CN107971449B - A kind of assembly method of timing chain - Google Patents

Abstract

The invention discloses a kind of assembly methods of timing chain of chain mounting technology field, the following steps are included: sleeve choosing point, pin shaft blanking, centreless grinding, pin shaft choosing point, inside and outside piece blanking, inner sheet string is tested, chain assembly, section is pulled down in advance, survey length, ring head running-in, roll school, clean oiling and packaging, the present invention eliminates the raw material that there is defect on surface in the raw material choice phase, greatly improve again raw material production preliminary working stage qualification rate, by pulling down section in advance, ring head running-in and finished product survey long process, it ensure that the qualification rate of timing chain product, the interior outer plate and cover board of timing chain are riveted by cover plate, it ensure that the flexibility of each chain link of timing chain, place the generation of slippage phenomenon, the invention avoids traditional mode operation difficulty by pairing mark assembly chain is big, assembly efficiency is low, it be easy to cause maloperation The drawbacks of, assembly method is flexibly accurate, and assembly efficiency is high.

Description

A kind of assembly method of timing chain

Technical field

The present invention relates to chain mounting technology field, specially a kind of assembly method of timing chain.

Background technique

In recent years, the timing transmission of automobile engine uses chain drive system more and more widely, because it is with structure Compact, transmitting power height, reliability and the remarkable advantages such as wearability height, design type multiplicity, maintenance-free, overcome gear Certain inadequate natural endowments in transmission and belt transmission performance, and new use value is added to automobile end user, it is increasingly aobvious Its wide market application prospect is shown.The work of timing chain is then by high duty metal chain, by crankshaft and camshaft etc. The sprocket wheel of component connects and operates synchronously its holding.

For the port timing for matching engine, timing chain must satisfy camshaft timing drive sprocket and crankshaft when assembling The relative position of timing sprocket requires, by timing chain by the moving corner relationship of crankshaft and inlet and outlet camshaft and oil pump Solidification, the valve timing of camshaft is driven when guaranteeing that piston is in top dead centre, and the dynamic load in the transmission of reasonable disposition sprocket wheel disappears Except the overlaying influence of torque peak.The assembly of car engine timing chain at present, which mostly uses greatly, makes a mark on sprocket wheel, right The assembly mode that colour code is made on chain position is answered, this mode operation difficulty by pairing mark assembly chain is big, assembly efficiency It is low, it is be easy to cause maloperation, for this purpose, we have invented a kind of assembly methods of timing chain to come into operation, to solve above-mentioned ask Topic.

Summary of the invention

The purpose of the present invention is to provide a kind of assembly methods of timing chain, mentioned above in the background art to solve The problem of mode operation difficulty by pairing mark assembly chain is big, and assembly efficiency is low, be easy to cause maloperation.

To achieve the above object, the invention provides the following technical scheme: a kind of assembly method of timing chain, including it is following Step: sleeve choosing point, pin shaft blanking, centreless grinding, pin shaft choosing point, inside and outside piece blanking, inner sheet string test, chain assembly, in advance pull down section, It surveys length, ring head running-in, roll school, cleaning oiling and packaging, the assembly method of the timing chain, the specific steps are as follows:

S1: sleeve choosing point: sleeve is poured into string tryoff, after sealing in hand fork, is carried out range estimation and is selected, and crackle, big has been picked out The substandard product of gap, scabbing, point, rusty stain, embossing seal and askew sleeve surface defect in appearance, it is spare；

S2: pin shaft blanking: the big volume pin shaft silk of 70-90KG is changed to the rouleau pin shaft silk of 20-30KG simultaneously by operative employee by hand It is placed on the material frame of pin shaft blanking machine, is rasped away on silk head by head hand vice pinch off 5-10mm, then with small key files Burr and carry out chamfering, by the pin shaft silk of length 700-900mm smear directly, convenient for be sent into seal wire aligning mechanism in, after alignment Pin shaft silk is sent into cutting mould cavity part position and carries out high speed as the machine tool running of pin shaft blanking machine moves forward into the feeding roller of correcting Blank；

S3: centreless grinding: the pin shaft in step S2 is put on centerless grinding machine, and wherein the revolving speed of centerless grinding machine is 18-180r/ The revolving speed of min, grinding wheel and guide wheel is 120-130r/min, when carrying out the processing of pin shaft centreless grinding, roughly grinds stock removal 0.024- 0.026mm, fine grinding control is within 0.01mm, and part needs ovality≤0.01mm after grinding, and roughness reaches 0.2, determines and closes After lattice, can normally it be produced；

S4: pin shaft choosing point: it will carry out range estimation after centreless grinding treated pin shaft appearance screening plate marshalling and choose Choosing, picks out the too long or too short pin shaft of length, and both ends are uneven, collapse angle and burr appearance defect rejected product；

S5: blanking process inside and outside piece blanking: is carried out using the internal outer plate of press machine；

S6: inner sheet string is tested: carrier bar poured into machine for stringing and is cleaned, in the container without dirty impurity, installs after string tests fork and is switched on, Wait go here and there test fork string it is full after, put in V-groove on the table, make carrier bar is neat to sequence, estimated, pick out unfilled corner, embossing seal, Slit side, burr, bending deformation, rust staining, bonding die and jaundice be not complete, does not turn to be yellow and the carrier bar of piebald defect, forbid other kind of carrier bar It is mixed into；

S7: chain assembly: the carrier bar after string is tested is sent into assembly machine, and wherein the revolving speed of assembly machine is 50-60r/min, After assembly machine booting, operative employee is checked that chain link should rotate flexibly, and size meets by head inspection requirement to first carrier bar comprehensively Overall length standard requirements, interior spacing 3.17-3.19mm, outer link height 6.56-6.76mm, the depth of parallelism≤0.04mm, inner link dress Should not have after matching convex lining ring, burr, embossing seal, pry head, scratch, Short Item, machine wound, lining ring end face coining, parallelogram, piece with Lining ring out of plumb and lining ring are appeared inconsistent defect up and down, do not answer that jagged, machine wound, collapse a pin shaft, outer plate after outer link assembly Appear inconsistent and pin shaft of scratch, pin shaft out of plumb, pin shaft bends defect, can be produced after qualified；

S8: it pulls down section in advance: the qualified bundled chain of assembly is connected in pre- machine drawing, adjust reinforcing lever, applied by regulation The pretension for adding tensile load makes chain achieve the effect that shaping is regulatory, reduces the elongation of chain initial stage, and it is strong to improve chain fatigue Degree；

S9: it surveys length: first proofreading gauge, then the chain after prestretching is subjected to overall length measurement one by one, every 90-110 item is to one Lower gauge will adjust percentage meter reading when finding gauge and inconsistent percentage meter reading in time；

S10: ring head running-in: carrying out ring head for chain of the prestretching after qualified, be inserted in C mould and by hand one outer plate of lid, with having The outer plate of kerve is appeared nail pressing and hand hammer, and outer plate is struck to size requirement, adjusts running-in machine according to chain joint number, wherein running-in The running-in power 170-190N of machine, then by chain one by one on on running-in machine sprocket wheel, checking chain position whether in same level；

S11: it rolls school: sorted qualified chain will be measured, be pulled through one by one on flexibility verifier with slight hand-power, nothing Otherwise clamping stagnation and phenomenon side of dying for the sake of honour should be modified for qualification with correcting it, then the multiple drawing of row, until qualified；

S12: cleaning oiling: chain of total inspection after qualified is put into short sound wave cleaning machine, is added in rinse bath clean Or the kerosene after precipitating, 32# machinery oil is added in antirust oil groove and antirust oil presses the configured solution of 1:1, is opened later Machine cleaning；

S13: packaging: carries out length comparison with calliper on the table for the chain after drying, errorless hub disk around in rectangle, And be put into polybag, packing, which is carried out, with the Packaging Box of unified specification packs.

Preferably, in the step S2, the detailed process of pin shaft blanking are as follows:

S21: first carrying out multi-faceted inspection before booting to the lathe of pin shaft blanking machine, confirms ledger-plate and cutting blade Doffing mold and fallen the material and outer diameter of pin shaft silk；

S22: booting crawl examination is fallen, and checks the appearance of pin shaft, pin shaft surface should not have rust staining, machine to hurt defect, pin shaft silk Both ends of the surface answer smooth, intact recessed and tearing defect, pin shaft silk can be produced formally after carrying out first inspection, every time no less than 10 Only, rejected product is rejected through quality discrimination to pin shaft is shunt；

S23: during normal production, operative employee answers frequent self-test, and the appearance and size of selective examination detection pin shaft are no less than every time 10；

S24: operative employee will often detect from the pin shaft for connecing cargo bed and falling, in time discovery and cleaning rejected product, it is ensured that fall Expect the qualified product of pin shaft；

S25: carrying out batch management, and every 80KG is a batch, fills in work subpoena, indicates title, process, operator, date With outer diameter parameter, it is allowed for access after the assay was approved next procedure through technical staff.

Preferably, in the step S3, in centreless grinding process, the detailed process of centreless grinding are as follows:

S31: before booting, should check whether electric switch, hydraulic circuit, coolant liquid are normal, to the preceding 9- of processing when booting 11 progress self-tests, size as per advice require to process；

S32: part after grinding is carried out connecing goods with corbeil, can be poured into finished product box after self-test is qualified, rejected product falls Enter collecting receptacle, forbids to be mixed into qualified product；

S33: when size and undesirable roughness, should adjust the revolving speed of grinding wheel and guide wheel in time, repair grinding wheel and lead Wheel；

S34: replacing kind and when size, it is necessary to stringent site clearing, lathe and container, be not allow for different cultivars and Various sizes of part is at the scene；

S35: last 10-30 part cannot function as 10-30 part in addition to examining qualification and when replacement kind is shut down before being switched on Normal product should all import collecting receptacle.

Preferably, in the step S4, in pin shaft Separation process, specific steps are as follows:

S41: in predetermined region, sand sundries is first sifted out to the pin shaft through burnishing-in after centreless grinding processing, in operation must It must wear gloves, the part after burnishing-in is forbidden directly to be contacted with hand, prevents from getting rusty；

S42: the every case of product after screening is a batch, is sieved by the different location arbitrary extracting 5-7 of technical staff in the case Plate carry out item detection, have the unqualified criticism for qualification, two or more it is unqualified then criticism be it is unqualified, need to be returned Work.

Preferably, in the step S5, the concrete operation step of inside and outside piece blanking are as follows:

S51: an inspection is carried out to lathe by the inspection requirement of lathe point before booting, starts air pump, pressure reaches 0.2-0.4MPa When, can be switched on examination punching；

S52: when mold matches mould, paying attention to punch and pilot pin height dimension, checks steel band label and thickness width size, material Band stock shelf is fixed, and guarantees feeding controller reliably working, and steel band is smoothed by levelling machine, adjusts roll smoothing force with regulation handle Size, adjust feed length reach 13.15mm；

S53: when die-filling, mould bases is first adjacent to locating pin, briquetting compresses lower die, then runs to down slider of punch manually Dead point, and upper mold is compressed, punching machine closure height is adjusted, guarantees formed punch wedging cavity plate 1-2mm；

S54: in die trial, examination punching is carried out by 160-180 punching examination, and open coolant liquid water valve, cooling mold carries out simultaneously Head inspection, works normally 2-4 minutes after qualified, lathe jig frequency is adjusted to 260-280 beats/min.

Preferably, in the step S8, the concrete operations process for pulling down section in advance is as follows:

S81: when pre- machine drawing works normally, whether each sprocket wheel for answering running check to engage with chain is in same plane, no Allow chain to have scratch phenomenon, adjust reinforcing lever, guarantees prestretching fluctuation in 40-60N processing range；

S82: the chain after prestretching, every 500 are a batch, by technical staff different location arbitrary extracting 2-4 in the case Item is tested, and the chain being pulled through in advance first surveys its overall length, then again through prestretching, measures its overall length, front and back twice measured value it Difference be within 0.1mm it is normal, it is then unqualified more than 0.1mm, need to carry out reworked processing；

S83: every time after replacement roller, it is necessary to carry out examination again and draw.

Preferably, in the step S10, when carrying out ring head running-in, ring head piece will be beaten in place, must not be had and be thrown piece skew Chain after ring head is immersed 3-5min in machinery oil, carries out painting oil lubrication, prevent from burning, running-in to time must wait by phenomenon It comes to a complete stop to lathe and carries out replacement chain again, prevent hand clamping.

Preferably, in the step S11, during rolling school, detailed process are as follows:

S111: will be pulled through qualified chain and carry out visual examination one by one, discovery chain part have defect, crackle, machine wound, Burr, corrosion, coining, major and minor axis and collapse defect when, should remove and replace qualified part；

S112: carrying out pin shaft snap for the chain after Visual appearance one by one on rolling riveter, and 2-4 item, observation pin are rolled in first examination Whether axis riveter meets the requirement of the pin shaft outer diameter, two sides symmetry of expansion 2%-4% at 10-20, while not allowing There are de- riveting, leakage riveting phenomenon；

S113: will roll the chain after riveting and carry out ring head, cover nickel plating marker slip by hand, and label outward, mends riveting to size It is required that and guarantee that plunger both ends are lifted one's head uniformly, the flexibility at the position should not be destroyed；

S114: the chain after ring head is carried out to secondary drawing flexibility one by one, and requires both ends while stretching, is compared later Joint number, annular assembly rear chain joint number should be the standard joint number of various products, must not more piece or few section；

S115: chain is flown excessively, carries out visual examination to chain later, the inspection in inspection requirements and step S111 Look into require it is identical.

Preferably, in the step S12, cleaning oiling, specific step is as follows:

S121: it before booting, requires to carry out short sound wave cleaning machine an inspection according to the inspection of lathe point, current value is adjusted to 3.5-4.5A being then switched on；

S122: after booting, the chain qualified to total inspection is cleaned, and removes greasy dirt and iron filings sundries caused by after assembling, Chain hangs up shelf, and is put into cleaning basket, and cleaning basket is placed in the rinse bath of short sound wave cleaning machine, 3-5min is washed；

S123: the chain after cleaning immerses oiling in antirust oil groove after should dripping clean coal oil immediately, makes chain surface quilt completely Oil covering, uniformly coats antirust oil；

S124: the chain after oiling is put into progress 20-40s drying in drying tube, to guarantee the requirement of factory Storage period.

Compared with prior art, the beneficial effects of the present invention are: the present invention, which eliminates surface in the raw material choice phase, defect The raw material of disease greatly improves again raw material production preliminary working stage qualification rate, by pulling down in advance by the sampling observation of process layer by layer Section, ring head running-in and finished product survey long process, ensure that the qualification rate of timing chain product, by the interior outer plate and lid of timing chain Plate is riveted by cover plate, ensure that the flexibility of each chain link of timing chain, places the generation of slippage phenomenon, and the present invention is kept away To exempt from traditional big by the mode operation difficulty of pairing mark assembly chain, assembly efficiency is low, the drawbacks of be easy to causeing maloperation, Assembly method is flexibly accurate, and assembly efficiency is high.

Detailed description of the invention

Fig. 1 is invention work flow diagram.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Embodiment one

A kind of assembly method of timing chain, comprising the following steps: sleeve choosing point, the choosing of pin shaft blanking, centreless grinding, pin shaft Divide, inside and outside piece blanking, inner sheet string are tested, chain assembly, are pulled down section in advance, surveyed length, ring head running-in, roll school, cleaning oiling and packaging, institute State the assembly method of timing chain, the specific steps are as follows:

S1: sleeve choosing point: sleeve is poured into string tryoff, after sealing in hand fork, is carried out range estimation and is selected, and crackle, big has been picked out The substandard product of gap, scabbing, point, rusty stain, embossing seal and askew sleeve surface defect in appearance, it is spare；

S2: pin shaft blanking: the big volume pin shaft silk of 70KG is changed to the rouleau pin shaft silk of 20KG by hand and is placed on by operative employee On the material frame of pin shaft blanking machine, by head hand vice pinch off 5mm, then the burr on silk head is rasped away with small key files and is gone forward side by side Row chamfering smears the pin shaft silk of length 700mm directly, and convenient for being sent into seal wire aligning mechanism, the pin shaft silk after alignment is with pin shaft The machine tool running of blanker moves forward into the feeding roller of correcting and is sent into cutting mould cavity part position and carries out high speed blank, pin shaft blanking Detailed process are as follows:

S21: first carrying out multi-faceted inspection before booting to the lathe of pin shaft blanking machine, confirms ledger-plate and cutting blade Doffing mold and fallen the material and outer diameter of pin shaft silk；

S22: booting crawl examination is fallen, and checks the appearance of pin shaft, pin shaft surface should not have rust staining, machine to hurt defect, pin shaft silk Both ends of the surface answer smooth, intact recessed and tearing defect, pin shaft silk can be produced formally after carrying out first inspection, every time no less than 10 Only, rejected product is rejected through quality discrimination to pin shaft is shunt；

S23: during normal production, operative employee answers frequent self-test, and the appearance and size of selective examination detection pin shaft are no less than every time 10；

S24: operative employee will often detect from the pin shaft for connecing cargo bed and falling, in time discovery and cleaning rejected product, it is ensured that fall Expect the qualified product of pin shaft；

S25: carrying out batch management, and every 80KG is a batch, fills in work subpoena, indicates title, process, operator, date With outer diameter parameter, it is allowed for access after the assay was approved next procedure through technical staff；

S3: centreless grinding: the pin shaft in step S2 is put on centerless grinding machine, and wherein the revolving speed of centerless grinding machine is 18r/min, The revolving speed of grinding wheel and guide wheel is 120r/min, when carrying out the processing of pin shaft centreless grinding, roughly grinds stock removal 0.024mm, fine grinding control System is within 0.01mm, and part needs ovality≤0.01mm after grinding, and roughness reaches 0.2, after determining qualification, can carry out just Often production, in centreless grinding process, the specific workflow of centreless grinding are as follows:

S31: before booting, should check whether electric switch, hydraulic circuit, coolant liquid are normal, to first 9 of processing when booting Self-test is carried out, size as per advice requires to process；

S32: part after grinding is carried out connecing goods with corbeil, can be poured into finished product box after self-test is qualified, rejected product falls Enter collecting receptacle, forbids to be mixed into qualified product；

S33: when size and undesirable roughness, should adjust the revolving speed of grinding wheel and guide wheel in time, repair grinding wheel and lead Wheel；

S34: replacing kind and when size, it is necessary to stringent site clearing, lathe and container, be not allow for different cultivars and Various sizes of part is at the scene；

S35: preceding 10 of booting except examine it is qualified other than and when replacing kind shutdown last 10 cannot function as normal product, Collecting receptacle should all be imported；

S4: pin shaft choosing point: it will carry out range estimation after centreless grinding treated pin shaft appearance screening plate marshalling and choose Choosing, picks out the too long or too short pin shaft of length, and both ends are uneven, collapse angle and burr appearance defect rejected product, in pin shaft choosing point In the process, specific steps are as follows:

S41: in predetermined region, sand sundries is first sifted out to the pin shaft through burnishing-in after centreless grinding processing, in operation must It must wear gloves, the part after burnishing-in is forbidden directly to be contacted with hand, prevents from getting rusty；

S42: the every case of product after screening is a batch, by 5 sieve plate of different location arbitrary extracting of technical staff in the case Carry out item detection, have the unqualified criticism for qualification, two or more it is unqualified then criticism be it is unqualified, need to be returned Work；

S5: blanking process, the concrete operations of inside and outside piece blanking inside and outside piece blanking: are carried out using the internal outer plate of press machine Step are as follows:

S51: carrying out an inspection to lathe by the inspection requirement of lathe point before booting, start air pump, when pressure reaches 0.2MPa, side Can be switched on examination punching；

S52: when mold matches mould, paying attention to punch and pilot pin height dimension, checks steel band label and thickness width size, material Band stock shelf is fixed, and guarantees feeding controller reliably working, and steel band is smoothed by levelling machine, adjusts roll smoothing force with regulation handle Size, adjust feed length reach 13.15mm；

S53: when die-filling, mould bases is first adjacent to locating pin, briquetting compresses lower die, then runs to down slider of punch manually Dead point, and upper mold is compressed, punching machine closure height is adjusted, guarantees formed punch wedging cavity plate 1mm；

S54: in die trial, carrying out examination punching by 160 punching examinations, and open coolant liquid water valve, cooling mold, while carrying out head Inspection works normally 2 minutes after qualified, lathe jig frequency is adjusted to 260 beats/min；

S6: inner sheet string is tested: carrier bar poured into machine for stringing and is cleaned, in the container without dirty impurity, installs after string tests fork and is switched on, Wait go here and there test fork string it is full after, put in V-groove on the table, make carrier bar is neat to sequence, estimated, pick out unfilled corner, embossing seal, Slit side, burr, bending deformation, rust staining, bonding die and jaundice be not complete, does not turn to be yellow and the carrier bar of piebald defect, forbid other kind of carrier bar It is mixed into；

S7: chain assembly: the carrier bar after string is tested is sent into assembly machine, and wherein the revolving speed of assembly machine is 50r/min, is being filled After machine booting, operative employee is checked that chain link should rotate flexibly, and size meets overall length by head inspection requirement to first carrier bar comprehensively Standard requirements, interior spacing 3.17mm, outer link height 6.56mm, the depth of parallelism≤0.04mm should not have convex lining after inner link assembly Circle, burr, embossing seal, pry head, scratch, Short Item, machine wound, lining ring end face coining, parallelogram, piece and lining ring out of plumb and lining Inconsistent defect up and down of appearing is enclosed, jagged, machine wound, the scratch of the pin shaft that collapses, outer plate, pin shaft is not answered not to hang down after outer link assembly Directly, appear inconsistent and pin shaft of pin shaft bends defect, can be produced after qualified；

S8: it pulls down section in advance: the qualified bundled chain of assembly is connected in pre- machine drawing, adjust reinforcing lever, applied by regulation The pretension for adding tensile load makes chain achieve the effect that shaping is regulatory, reduces the elongation of chain initial stage, and it is strong to improve chain fatigue Degree, the concrete operations process for pulling down section in advance are as follows:

S81: when pre- machine drawing works normally, whether each sprocket wheel for answering running check to engage with chain is in same plane, no Allow chain to have scratch phenomenon, adjust reinforcing lever, guarantees prestretching fluctuation in 40N processing range；

S82: the chain after prestretching, every 500 are a batch, by technical staff different location arbitrary extracting 2 in the case It tests, the chain being pulled through in advance first surveys its overall length, then again through prestretching, measures its overall length, the difference of front and back measured value twice Within 0.1mm be it is normal, it is then unqualified more than 0.1mm, need to carry out reworked processing；

S83: every time after replacement roller, it is necessary to carry out examination again and draw；

S9: it surveys length: first proofreading gauge, then the chain after prestretching is subjected to overall length measurement one by one, every 90 to a subscript Object staff will adjust percentage meter reading when finding gauge and inconsistent percentage meter reading in time；

S10: ring head running-in: carrying out ring head for chain of the prestretching after qualified, be inserted in C mould and by hand one outer plate of lid, with having The outer plate of kerve is appeared nail pressing and hand hammer, and outer plate is struck to size requirement, adjusts running-in machine according to chain joint number, wherein running-in The running-in power 170N of machine, then by chain one by one on on running-in machine sprocket wheel, check chain position whether in same level, into When row ring head running-in, ring head piece will be beaten in place, must not be had and be thrown piece skew phenomenon, and the chain after ring head is immersed in machinery oil 3min carries out painting oil lubrication, prevents from burning, and running-in to time, which has to wait for lathe, comes to a complete stop and carry out replacement chain again, prevents from crushing Hand；

S11: it rolls school: sorted qualified chain will be measured, be pulled through one by one on flexibility verifier with slight hand-power, nothing Otherwise clamping stagnation and phenomenon side of dying for the sake of honour should be modified for qualification with correcting it, then the multiple drawing of row, until it is qualified, during rolling school, Its detailed process are as follows:

S111: will be pulled through qualified chain and carry out visual examination one by one, discovery chain part have defect, crackle, machine wound, Burr, corrosion, coining, major and minor axis and collapse defect when, should remove and replace qualified part；

S112: carrying out pin shaft snap for the chain after Visual appearance one by one on rolling riveter, and first examination rolls 2, observes pin shaft Whether riveter meets the requirement of the pin shaft outer diameter, two sides symmetry of expansion 2% at 10, while being not allow for de- riveting, leakage Riveting phenomenon；

S113: will roll the chain after riveting and carry out ring head, cover nickel plating marker slip by hand, and label outward, mends riveting to size It is required that and guarantee that plunger both ends are lifted one's head uniformly, the flexibility at the position should not be destroyed；

S114: the chain after ring head is carried out to secondary drawing flexibility one by one, and requires both ends while stretching, is compared later Joint number, annular assembly rear chain joint number should be the standard joint number of various products, must not more piece or few section；

S115: chain is flown excessively, carries out visual examination to chain later, the inspection in inspection requirements and step S111 Look into require it is identical；

S12: cleaning oiling: chain of total inspection after qualified is put into short sound wave cleaning machine, is added in rinse bath clean Or the kerosene after precipitating, 32# machinery oil is added in antirust oil groove and antirust oil presses the configured solution of 1:1, is opened later Machine cleaning, cleaning oiling, specific step is as follows:

S121: it before booting, requires to carry out short sound wave cleaning machine an inspection according to the inspection of lathe point, current value is adjusted to Then 3.5A is switched on；

S122: after booting, the chain qualified to total inspection is cleaned, and removes greasy dirt and iron filings sundries caused by after assembling, Chain hangs up shelf, and is put into cleaning basket, and cleaning basket is placed in the rinse bath of short sound wave cleaning machine, 3min is washed；

S123: the chain after cleaning immerses oiling in antirust oil groove after should dripping clean coal oil immediately, makes chain surface quilt completely Oil covering, uniformly coats antirust oil；

S124: the chain after oiling is put into progress 20s drying in drying tube, to guarantee the requirement of factory Storage period；

S13: packaging: carries out length comparison with calliper on the table for the chain after drying, errorless hub disk around in rectangle, And be put into polybag, packing, which is carried out, with the Packaging Box of unified specification packs.

Embodiment two

A kind of assembly method of timing chain, comprising the following steps: sleeve choosing point, the choosing of pin shaft blanking, centreless grinding, pin shaft Divide, inside and outside piece blanking, inner sheet string are tested, chain assembly, are pulled down section in advance, surveyed length, ring head running-in, roll school, cleaning oiling and packaging, institute State the assembly method of timing chain, the specific steps are as follows:

S1: sleeve choosing point: sleeve is poured into string tryoff, after sealing in hand fork, is carried out range estimation and is selected, and crackle, big has been picked out The substandard product of gap, scabbing, point, rusty stain, embossing seal and askew sleeve surface defect in appearance, it is spare；

S2: pin shaft blanking: the big volume pin shaft silk of 90KG is changed to the rouleau pin shaft silk of 30KG by hand and is placed on by operative employee On the material frame of pin shaft blanking machine, the burr on silk head is rasped away simultaneously by head hand vice pinch off 10mm, then with small key files Chamfering is carried out, the pin shaft silk of length 900mm is smeared directly, convenient for being sent into seal wire aligning mechanism, the pin shaft silk after alignment is with pin The machine tool running of axis blanker moves forward into the feeding roller of correcting and is sent into cutting mould cavity part position and carries out high speed blank, pin shaft blanking Detailed process are as follows:

S21: first carrying out multi-faceted inspection before booting to the lathe of pin shaft blanking machine, confirms ledger-plate and cutting blade Doffing mold and fallen the material and outer diameter of pin shaft silk；

S22: booting crawl examination is fallen, and checks the appearance of pin shaft, pin shaft surface should not have rust staining, machine to hurt defect, pin shaft silk Both ends of the surface answer smooth, intact recessed and tearing defect, pin shaft silk can be produced formally after carrying out first inspection, every time no less than 10 Only, rejected product is rejected through quality discrimination to pin shaft is shunt；

S23: during normal production, operative employee answers frequent self-test, and the appearance and size of selective examination detection pin shaft are no less than every time 10；

S24: operative employee will often detect from the pin shaft for connecing cargo bed and falling, in time discovery and cleaning rejected product, it is ensured that fall Expect the qualified product of pin shaft；

S25: carrying out batch management, and every 80KG is a batch, fills in work subpoena, indicates title, process, operator, date With outer diameter parameter, it is allowed for access after the assay was approved next procedure through technical staff；

S3: centreless grinding: the pin shaft in step S2 is put on centerless grinding machine, and wherein the revolving speed of centerless grinding machine is 180r/ The revolving speed of min, grinding wheel and guide wheel is 130r/min, when carrying out the processing of pin shaft centreless grinding, roughly grinds stock removal 0.026mm, essence Mill control is within 0.01mm, and part needs ovality≤0.01mm after grinding, and roughness reaches 0.2, after determining qualification, Fang Kejin The normal production of row, in centreless grinding process, the detailed process of centreless grinding are as follows:

S31: before booting, should check whether electric switch, hydraulic circuit, coolant liquid are normal, to the preceding 9- of processing when booting 11 progress self-tests, size as per advice require to process；

S32: part after grinding is carried out connecing goods with corbeil, can be poured into finished product box after self-test is qualified, rejected product falls Enter collecting receptacle, forbids to be mixed into qualified product；

S33: when size and undesirable roughness, should adjust the revolving speed of grinding wheel and guide wheel in time, repair grinding wheel and lead Wheel；

S34: replacing kind and when size, it is necessary to stringent site clearing, lathe and container, be not allow for different cultivars and Various sizes of part is at the scene；

S35: preceding 30 of booting except examine it is qualified other than and when replacing kind shutdown last 30 cannot function as normal product, Collecting receptacle should all be imported；

S4: pin shaft choosing point: it will carry out range estimation after centreless grinding treated pin shaft appearance screening plate marshalling and choose Choosing, picks out the too long or too short pin shaft of length, and both ends are uneven, collapse angle and burr appearance defect rejected product, in pin shaft choosing point In the process, specific steps are as follows:

S41: in predetermined region, sand sundries is first sifted out to the pin shaft through burnishing-in after centreless grinding processing, in operation must It must wear gloves, the part after burnishing-in is forbidden directly to be contacted with hand, prevents from getting rusty；

S42: the every case of product after screening is a batch, by 7 sieve plate of different location arbitrary extracting of technical staff in the case Carry out item detection, have the unqualified criticism for qualification, two or more it is unqualified then criticism be it is unqualified, need to be returned Work；

S5: blanking process, the concrete operations of inside and outside piece blanking inside and outside piece blanking: are carried out using the internal outer plate of press machine Step are as follows:

S51: carrying out an inspection to lathe by the inspection requirement of lathe point before booting, start air pump, when pressure reaches 0.4MPa, side Can be switched on examination punching；

S52: when mold matches mould, paying attention to punch and pilot pin height dimension, checks steel band label and thickness width size, material Band stock shelf is fixed, and guarantees feeding controller reliably working, and steel band is smoothed by levelling machine, adjusts roll smoothing force with regulation handle Size, adjust feed length reach 13.15mm；

S53: when die-filling, mould bases is first adjacent to locating pin, briquetting compresses lower die, then runs to down slider of punch manually Dead point, and upper mold is compressed, punching machine closure height is adjusted, guarantees formed punch wedging cavity plate 2mm；

S54: in die trial, carrying out examination punching by 180 punching examinations, and open coolant liquid water valve, cooling mold, while carrying out head Inspection works normally 4 minutes after qualified, lathe jig frequency is adjusted to 280 beats/min；

S6: inner sheet string is tested: carrier bar poured into machine for stringing and is cleaned, in the container without dirty impurity, installs after string tests fork and is switched on, Wait go here and there test fork string it is full after, put in V-groove on the table, make carrier bar is neat to sequence, estimated, pick out unfilled corner, embossing seal, Slit side, burr, bending deformation, rust staining, bonding die and jaundice be not complete, does not turn to be yellow and the carrier bar of piebald defect, forbid other kind of carrier bar It is mixed into；

S7: chain assembly: the carrier bar after string is tested is sent into assembly machine, and wherein the revolving speed of assembly machine is 60r/min, is being filled After machine booting, operative employee is checked that chain link should rotate flexibly, and size meets overall length by head inspection requirement to first carrier bar comprehensively Standard requirements, interior spacing 3.19mm, outer link height 6.76mm, the depth of parallelism≤0.04mm should not have convex lining after inner link assembly Circle, burr, embossing seal, pry head, scratch, Short Item, machine wound, lining ring end face coining, parallelogram, piece and lining ring out of plumb and lining Inconsistent defect up and down of appearing is enclosed, jagged, machine wound, the scratch of the pin shaft that collapses, outer plate, pin shaft is not answered not to hang down after outer link assembly Directly, appear inconsistent and pin shaft of pin shaft bends defect, can be produced after qualified；

S8: it pulls down section in advance: the qualified bundled chain of assembly is connected in pre- machine drawing, adjust reinforcing lever, applied by regulation The pretension for adding tensile load makes chain achieve the effect that shaping is regulatory, reduces the elongation of chain initial stage, and it is strong to improve chain fatigue Degree, the concrete operations process for pulling down section in advance are as follows:

S81: when pre- machine drawing works normally, whether each sprocket wheel for answering running check to engage with chain is in same plane, no Allow chain to have scratch phenomenon, adjust reinforcing lever, guarantees prestretching fluctuation in 60N processing range；

S82: the chain after prestretching, every 500 are a batch, by technical staff different location arbitrary extracting 4 in the case It tests, the chain being pulled through in advance first surveys its overall length, then again through prestretching, measures its overall length, the difference of front and back measured value twice Within 0.1mm be it is normal, it is then unqualified more than 0.1mm, need to carry out reworked processing；

S83: every time after replacement roller, it is necessary to carry out examination again and draw；

S9: it surveys length: first proofreading gauge, then the chain after prestretching is subjected to overall length measurement one by one, every 110 to a subscript Object staff will adjust percentage meter reading when finding gauge and inconsistent percentage meter reading in time；

S10: ring head running-in: carrying out ring head for chain of the prestretching after qualified, be inserted in C mould and by hand one outer plate of lid, with having The outer plate of kerve is appeared nail pressing and hand hammer, and outer plate is struck to size requirement, adjusts running-in machine according to chain joint number, wherein running-in The running-in power 190N of machine, then by chain one by one on on running-in machine sprocket wheel, check chain position whether in same level, into When row ring head running-in, ring head piece will be beaten in place, must not be had and be thrown piece skew phenomenon, and the chain after ring head is immersed in machinery oil 5min carries out painting oil lubrication, prevents from burning, and running-in to time, which has to wait for lathe, comes to a complete stop and carry out replacement chain again, prevents from crushing Hand；

S11: it rolls school: sorted qualified chain will be measured, be pulled through one by one on flexibility verifier with slight hand-power, nothing Otherwise clamping stagnation and phenomenon side of dying for the sake of honour should be modified for qualification with correcting it, then the multiple drawing of row, until it is qualified, during rolling school, Its detailed process are as follows:

S111: will be pulled through qualified chain and carry out visual examination one by one, discovery chain part have defect, crackle, machine wound, Burr, corrosion, coining, major and minor axis and collapse defect when, should remove and replace qualified part；

S112: carrying out pin shaft snap for the chain after Visual appearance one by one on rolling riveter, and first examination rolls 4, observes pin shaft Whether riveter meets the requirement of the pin shaft outer diameter, two sides symmetry of expansion 4% at 20, while being not allow for de- riveting, leakage Riveting phenomenon；

S113: will roll the chain after riveting and carry out ring head, cover nickel plating marker slip by hand, and label outward, mends riveting to size It is required that and guarantee that plunger both ends are lifted one's head uniformly, the flexibility at the position should not be destroyed；

S114: the chain after ring head is carried out to secondary drawing flexibility one by one, and requires both ends while stretching, is compared later Joint number, annular assembly rear chain joint number should be the standard joint number of various products, must not more piece or few section；

S115: chain is flown excessively, carries out visual examination to chain later, the inspection in inspection requirements and step S111 Look into require it is identical；

S12: cleaning oiling: chain of total inspection after qualified is put into short sound wave cleaning machine, is added in rinse bath clean Or the kerosene after precipitating, 32# machinery oil is added in antirust oil groove and antirust oil presses the configured solution of 1:1, is opened later Machine cleaning, cleaning oiling, specific step is as follows:

S121: it before booting, requires to carry out short sound wave cleaning machine an inspection according to the inspection of lathe point, current value is adjusted to Then 4.5A is switched on；

S122: after booting, the chain qualified to total inspection is cleaned, and removes greasy dirt and iron filings sundries caused by after assembling, Chain hangs up shelf, and is put into cleaning basket, and cleaning basket is placed in the rinse bath of short sound wave cleaning machine, 5min is washed；

S123: the chain after cleaning immerses oiling in antirust oil groove after should dripping clean coal oil immediately, makes chain surface quilt completely Oil covering, uniformly coats antirust oil；

S124: the chain after oiling is put into progress 40s drying in drying tube, to guarantee the requirement of factory Storage period；

S13: packaging: carries out length comparison with calliper on the table for the chain after drying, errorless hub disk around in rectangle, And be put into polybag, packing, which is carried out, with the Packaging Box of unified specification packs.

Embodiment three

A kind of assembly method of timing chain, comprising the following steps: sleeve choosing point, the choosing of pin shaft blanking, centreless grinding, pin shaft Divide, inside and outside piece blanking, inner sheet string are tested, chain assembly, are pulled down section in advance, surveyed length, ring head running-in, roll school, cleaning oiling and packaging, institute State the assembly method of timing chain, the specific steps are as follows:

S1: sleeve choosing point: sleeve is poured into string tryoff, after sealing in hand fork, is carried out range estimation and is selected, and crackle, big has been picked out The substandard product of gap, scabbing, point, rusty stain, embossing seal and askew sleeve surface defect in appearance, it is spare；

S2: pin shaft blanking: the big volume pin shaft silk of 80KG is changed to the rouleau pin shaft silk of 25KG by hand and is placed on by operative employee On the material frame of pin shaft blanking machine, by head hand vice pinch off 8mm, then the burr on silk head is rasped away with small key files and is gone forward side by side Row chamfering smears the pin shaft silk of length 800mm directly, and convenient for being sent into seal wire aligning mechanism, the pin shaft silk after alignment is with pin shaft The machine tool running of blanker moves forward into the feeding roller of correcting and is sent into cutting mould cavity part position and carries out high speed blank, pin shaft blanking Detailed process are as follows:

S21: first carrying out multi-faceted inspection before booting to the lathe of pin shaft blanking machine, confirms ledger-plate and cutting blade Doffing mold and fallen the material and outer diameter of pin shaft silk；

S22: booting crawl examination is fallen, and checks the appearance of pin shaft, pin shaft surface should not have rust staining, machine to hurt defect, pin shaft silk Both ends of the surface answer smooth, intact recessed and tearing defect, pin shaft silk can be produced formally after carrying out first inspection, every time no less than 10 Only, rejected product is rejected through quality discrimination to pin shaft is shunt；

S23: during normal production, operative employee answers frequent self-test, and the appearance and size of selective examination detection pin shaft are no less than every time 10；

S24: operative employee will often detect from the pin shaft for connecing cargo bed and falling, in time discovery and cleaning rejected product, it is ensured that fall Expect the qualified product of pin shaft；

S25: carrying out batch management, and every 80KG is a batch, fills in work subpoena, indicates title, process, operator, date With outer diameter parameter, it is allowed for access after the assay was approved next procedure through technical staff；

S3: centreless grinding: the pin shaft in step S2 is put on centerless grinding machine, and wherein the revolving speed of centerless grinding machine is 100r/ The revolving speed of min, grinding wheel and guide wheel is 125r/min, when carrying out the processing of pin shaft centreless grinding, roughly grinds stock removal 0.025mm, essence Mill control is within 0.01mm, and part needs ovality≤0.01mm after grinding, and roughness reaches 0.2, after determining qualification, Fang Kejin The normal production of row, in centreless grinding process, the detailed process of centreless grinding are as follows:

S31: before booting, should check whether electric switch, hydraulic circuit, coolant liquid are normal, to before processing 10 when booting Part carries out self-test, and size as per advice requires to process；

S32: part after grinding is carried out connecing goods with corbeil, can be poured into finished product box after self-test is qualified, rejected product falls Enter collecting receptacle, forbids to be mixed into qualified product；

S33: when size and undesirable roughness, should adjust the revolving speed of grinding wheel and guide wheel in time, repair grinding wheel and lead Wheel；

S34: replacing kind and when size, it is necessary to stringent site clearing, lathe and container, be not allow for different cultivars and Various sizes of part is at the scene；

S35: preceding 20 of booting except examine it is qualified other than and when replacing kind shutdown last 20 cannot function as normal product, Collecting receptacle should all be imported；

S4: pin shaft choosing point: it will carry out range estimation after centreless grinding treated pin shaft appearance screening plate marshalling and choose Choosing, picks out the too long or too short pin shaft of length, and both ends are uneven, collapse angle and burr appearance defect rejected product, in pin shaft choosing point In the process, specific steps are as follows:

S41: in predetermined region, sand sundries is first sifted out to the pin shaft through burnishing-in after centreless grinding processing, in operation must It must wear gloves, the part after burnishing-in is forbidden directly to be contacted with hand, prevents from getting rusty；

S42: the every case of product after screening is a batch, by 6 sieve plate of different location arbitrary extracting of technical staff in the case Carry out item detection, have the unqualified criticism for qualification, two or more it is unqualified then criticism be it is unqualified, need to be returned Work；

S5: blanking process, the concrete operations of inside and outside piece blanking inside and outside piece blanking: are carried out using the internal outer plate of press machine Step are as follows:

S51: carrying out an inspection to lathe by the inspection requirement of lathe point before booting, start air pump, when pressure reaches 0.3MPa, side Can be switched on examination punching；

S52: when mold matches mould, paying attention to punch and pilot pin height dimension, checks steel band label and thickness width size, material Band stock shelf is fixed, and guarantees feeding controller reliably working, and steel band is smoothed by levelling machine, adjusts roll smoothing force with regulation handle Size, adjust feed length reach 13.15mm；

S53: when die-filling, mould bases is first adjacent to locating pin, briquetting compresses lower die, then runs to down slider of punch manually Dead point, and upper mold is compressed, punching machine closure height is adjusted, guarantees formed punch wedging cavity plate 1.5mm；

S54: in die trial, carrying out examination punching by 170 punching examinations, and open coolant liquid water valve, cooling mold, while carrying out head Inspection works normally 3 minutes after qualified, lathe jig frequency is adjusted to 270 beats/min；

S6: inner sheet string is tested: carrier bar poured into machine for stringing and is cleaned, in the container without dirty impurity, installs after string tests fork and is switched on, Wait go here and there test fork string it is full after, put in V-groove on the table, make carrier bar is neat to sequence, estimated, pick out unfilled corner, embossing seal, Slit side, burr, bending deformation, rust staining, bonding die and jaundice be not complete, does not turn to be yellow and the carrier bar of piebald defect, forbid other kind of carrier bar It is mixed into；

S7: chain assembly: the carrier bar after string is tested is sent into assembly machine, and wherein the revolving speed of assembly machine is 55r/min, is being filled After machine booting, operative employee is checked that chain link should rotate flexibly, and size meets overall length by head inspection requirement to first carrier bar comprehensively Standard requirements, interior spacing 3.18mm, outer link height 6.66mm, the depth of parallelism≤0.04mm should not have convex lining after inner link assembly Circle, burr, embossing seal, pry head, scratch, Short Item, machine wound, lining ring end face coining, parallelogram, piece and lining ring out of plumb and lining Inconsistent defect up and down of appearing is enclosed, jagged, machine wound, the scratch of the pin shaft that collapses, outer plate, pin shaft is not answered not to hang down after outer link assembly Directly, appear inconsistent and pin shaft of pin shaft bends defect, can be produced after qualified；

S8: it pulls down section in advance: the qualified bundled chain of assembly is connected in pre- machine drawing, adjust reinforcing lever, applied by regulation The pretension for adding tensile load makes chain achieve the effect that shaping is regulatory, reduces the elongation of chain initial stage, and it is strong to improve chain fatigue Degree, the concrete operations process for pulling down section in advance are as follows:

S81: when pre- machine drawing works normally, whether each sprocket wheel for answering running check to engage with chain is in same plane, no Allow chain to have scratch phenomenon, adjust reinforcing lever, guarantees prestretching fluctuation in 50N processing range；

S82: the chain after prestretching, every 500 are a batch, by technical staff different location arbitrary extracting 3 in the case It tests, the chain being pulled through in advance first surveys its overall length, then again through prestretching, measures its overall length, the difference of front and back measured value twice Within 0.1mm be it is normal, it is then unqualified more than 0.1mm, need to carry out reworked processing；

S83: every time after replacement roller, it is necessary to carry out examination again and draw；

S9: it surveys length: first proofreading gauge, then the chain after prestretching is subjected to overall length measurement one by one, every 100 to a subscript Object staff will adjust percentage meter reading when finding gauge and inconsistent percentage meter reading in time；

S10: ring head running-in: carrying out ring head for chain of the prestretching after qualified, be inserted in C mould and by hand one outer plate of lid, with having The outer plate of kerve is appeared nail pressing and hand hammer, and outer plate is struck to size requirement, adjusts running-in machine according to chain joint number, wherein running-in The running-in power 180N of machine, then by chain one by one on on running-in machine sprocket wheel, check chain position whether in same level, into When row ring head running-in, ring head piece will be beaten in place, must not be had and be thrown piece skew phenomenon, and the chain after ring head is immersed in machinery oil 4min carries out painting oil lubrication, prevents from burning, and running-in to time, which has to wait for lathe, comes to a complete stop and carry out replacement chain again, prevents from crushing Hand；

S11: it rolls school: sorted qualified chain will be measured, be pulled through one by one on flexibility verifier with slight hand-power, nothing Otherwise clamping stagnation and phenomenon side of dying for the sake of honour should be modified for qualification with correcting it, then the multiple drawing of row, until it is qualified, during rolling school, Its detailed process are as follows:

S111: will be pulled through qualified chain and carry out visual examination one by one, discovery chain part have defect, crackle, machine wound, Burr, corrosion, coining, major and minor axis and collapse defect when, should remove and replace qualified part；

S112: carrying out pin shaft snap for the chain after Visual appearance one by one on rolling riveter, and first examination rolls 3, observes pin shaft Whether riveter meets the requirement of the pin shaft outer diameter, two sides symmetry of expansion 3% at 15, while being not allow for de- riveting, leakage Riveting phenomenon；

S113: will roll the chain after riveting and carry out ring head, cover nickel plating marker slip by hand, and label outward, mends riveting to size It is required that and guarantee that plunger both ends are lifted one's head uniformly, the flexibility at the position should not be destroyed；

S114: the chain after ring head is carried out to secondary drawing flexibility one by one, and requires both ends while stretching, is compared later Joint number, annular assembly rear chain joint number should be the standard joint number of various products, must not more piece or few section；

S115: chain is flown excessively, carries out visual examination to chain later, the inspection in inspection requirements and step S111 Look into require it is identical；

S12: cleaning oiling: chain of total inspection after qualified is put into short sound wave cleaning machine, is added in rinse bath clean Or the kerosene after precipitating, 32# machinery oil is added in antirust oil groove and antirust oil presses the configured solution of 1:1, is opened later Machine cleaning, cleaning oiling, specific step is as follows:

S121: it before booting, requires to carry out short sound wave cleaning machine an inspection according to the inspection of lathe point, current value is adjusted to Then 4A is switched on；

S122: after booting, the chain qualified to total inspection is cleaned, and removes greasy dirt and iron filings sundries caused by after assembling, Chain hangs up shelf, and is put into cleaning basket, and cleaning basket is placed in the rinse bath of short sound wave cleaning machine, 4min is washed；

S123: the chain after cleaning immerses oiling in antirust oil groove after should dripping clean coal oil immediately, makes chain surface quilt completely Oil covering, uniformly coats antirust oil；

S124: the chain after oiling is put into progress 30s drying in drying tube, to guarantee the requirement of factory Storage period；

S13: packaging: carries out length comparison with calliper on the table for the chain after drying, errorless hub disk around in rectangle, And be put into polybag, packing, which is carried out, with the Packaging Box of unified specification packs.

It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (9)

1. a kind of assembly method of timing chain, comprising the following steps: sleeve choosing divides, the choosing of pin shaft blanking, centreless grinding, pin shaft divides, Inside and outside piece blanking, inner sheet string are tested, chain assembly, pull down section in advance, survey length, ring head running-in, rolling school, cleaning oiling and packaging, special Sign is: the assembly method of the timing chain, the specific steps are as follows:

S1: sleeve choosing point: by sleeve pour into string tryoff in, after sealing in hand fork, carry out range estimation select, picked out crackle, big gap, The substandard product of scabbing, point, rusty stain, embossing seal and askew sleeve surface defect in appearance, it is spare；

S2: pin shaft blanking: the big volume pin shaft silk of 70-90KG is changed to the rouleau pin shaft silk of 20-30KG by hand and placed by operative employee On the material frame of pin shaft blanking machine, the hair on silk head is rasped away by head hand vice pinch off 5-10mm, then with small key files Chamfering is pierced and carried out, the pin shaft silk of length 700-900mm is smeared directly, convenient for being sent into seal wire aligning mechanism, the pin shaft after alignment Silk is sent into cutting mould cavity part position and carries out high speed blank as the machine tool running of pin shaft blanking machine moves forward into the feeding roller of correcting；

S3: centreless grinding: the pin shaft in step S2 is put on centerless grinding machine, and wherein the revolving speed of centerless grinding machine is 18-180r/min, The revolving speed of grinding wheel and guide wheel is 120-130r/min, when carrying out the processing of pin shaft centreless grinding, roughly grinds stock removal 0.024- 0.026mm, fine grinding control is within 0.01mm, and part needs ovality≤0.01mm after grinding, and roughness reaches 0.2, determines and closes After lattice, can normally it be produced；

S4: pin shaft choosing point: it will carry out range estimation after centreless grinding treated pin shaft appearance screening plate marshalling and select, pick The too long or too short pin shaft of length out, both ends are uneven, collapse angle and burr appearance defect rejected product；

S5: blanking process inside and outside piece blanking: is carried out using the internal outer plate of press machine；

S6: inner sheet string is tested: carrier bar being poured into machine for stringing and is cleaned, in the container without dirty impurity, installs after string tests fork and is switched on, wait go here and there It after testing fork string completely, puts in V-groove on the table, makes carrier bar is neat to sequence, estimated, pick out unfilled corner, embossing seal, slit Side, burr, bending deformation, rust staining, bonding die and jaundice be not complete, does not turn to be yellow and the carrier bar of piebald defect, forbids other kind of carrier bar mixed Enter；

S7: chain assembly: the carrier bar after string is tested is sent into assembly machine, and wherein the revolving speed of assembly machine is 50-60r/min, is being filled After machine booting, operative employee is checked that chain link should rotate flexibly, and size meets overall length by head inspection requirement to first carrier bar comprehensively Standard requirements, interior spacing 3.17-3.19mm, outer link height 6.56-6.76mm, the depth of parallelism≤0.04mm, after inner link assembly Should not there are convex lining ring, burr, embossing seal, pry head, scratch, Short Item, machine wound, lining ring end face coining, parallelogram, piece and lining ring Out of plumb and lining ring appear up and down inconsistent defect, outer link assembly after do not answer jagged, machine wound, the pin shaft that collapses, outer plate abrade, Appear inconsistent and pin shaft of pin shaft out of plumb, pin shaft bends defect, can be produced after qualified；

S8: it pulls down section in advance: the qualified bundled chain of assembly is connected in pre- machine drawing, adjust reinforcing lever, apply by regulation and draw The pretension for stretching load makes chain achieve the effect that shaping is regulatory, reduces the elongation of chain initial stage, improves chain fatigue strength；

S9: it surveys length: first proofreading gauge, then the chain after prestretching is subjected to overall length measurement one by one, every 90-110 item is to a subscript Object staff will adjust percentage meter reading when finding gauge and inconsistent percentage meter reading in time；

S10: ring head running-in: chain of the prestretching after qualified is subjected to ring head, C mould and by hand one outer plate of lid are inserted in, with kerve Outer plate appear nail pressing and hand hammer, outer plate is struck to size requirement, running-in machine is adjusted according to chain joint number, wherein running-in machine Running-in power 170-190N, then by chain one by one on on running-in machine sprocket wheel, checking chain position whether in same level；

S11: it rolls school: sorted qualified chain will be measured, be pulled through one by one on flexibility verifier with slight hand-power, no clamping stagnation And otherwise phenomenon side of dying for the sake of honour should be modified for qualification with correcting it, then the multiple drawing of row, until qualified；

S12: cleaning oiling: chain of total inspection after qualified is put into short sound wave cleaning machine, is added in rinse bath clean or heavy Kerosene behind shallow lake, is added 32# machinery oil in antirust oil groove and antirust oil presses the configured solution of 1:1, boots up later clear It washes；

S13: packaging: carries out length comparison with calliper on the table for the chain after drying, and errorless hub disk is put around in rectangle Enter in polybag, carries out packing with the Packaging Box of unified specification and pack.

2. a kind of assembly method of timing chain according to claim 1, it is characterised in that: in the step S2, pin shaft The detailed process of blanking are as follows:

S21: first carrying out multi-faceted inspection before booting to the lathe of pin shaft blanking machine, confirms the doffing of ledger-plate and cutting blade Mold and fallen the material and outer diameter of pin shaft silk；

S22: booting crawl examination is fallen, and checks the appearance of pin shaft, and pin shaft surface should not have rust staining, machine to hurt defect, and the two of pin shaft silk End face is answered smooth, and intact recessed and tearing defect, pin shaft silk can be produced formally after carrying out first inspection, every time no less than 10, Rejected product is rejected through quality discrimination to pin shaft is shunt；

S23: during normal production, operative employee answers frequent self-test, the appearance and size of selective examination detection pin shaft, and every time no less than 10 Only；

S24: operative employee will often detect from the pin shaft for connecing cargo bed and falling, in time discovery and cleaning rejected product, it is ensured that blanking pin The qualified product of axis；

S25: carrying out batch management, and every 80KG is a batch, fills in work subpoena, indicates title, process, operator, date and outer Diameter dimensional parameters are allowed for access next procedure after the assay was approved through technical staff.

3. a kind of assembly method of timing chain according to claim 1, it is characterised in that: in the step S3, in nothing In reduction process, the detailed process of centreless grinding are as follows:

S31: before booting, should check whether electric switch, hydraulic circuit, coolant liquid are normal, to the preceding 9-11 part of processing when booting Self-test is carried out, size as per advice requires to process；

S32: part after grinding is carried out connecing goods with corbeil, can be poured into finished product box after self-test is qualified, rejected product pours into useless Product case is forbidden to be mixed into qualified product；

S33: when size and undesirable roughness, the revolving speed of grinding wheel and guide wheel should be adjusted in time, repairs grinding wheel and guide wheel；

S34: when replacing kind and size, it is necessary to which stringent site clearing, lathe and container are not allow for different cultivars and difference The part of size is at the scene；

S35: last 10-30 part cannot function as normally 10-30 part in addition to examining qualification and when replacement kind is shut down before being switched on Product should all import collecting receptacle.

4. a kind of assembly method of timing chain according to claim 1, it is characterised in that: in the step S4, in pin In axis Separation process, specific steps are as follows:

S41: in predetermined region, first sifting out sand sundries to the pin shaft through burnishing-in after centreless grinding processing, in operation must band Upper gloves, the part after burnishing-in are forbidden directly to be contacted with hand, prevent from getting rusty；

S42: the every case of product after screening be a batch, by the different location arbitrary extracting 5-7 sieve plate of technical staff in the case into Row item detection, have the unqualified criticism for qualification, two or more it is unqualified then criticism be it is unqualified, need to do over again.

5. a kind of assembly method of timing chain according to claim 1, it is characterised in that: inside and outside in the step S5 The concrete operation step of piece blanking are as follows:

S51: carrying out an inspection to lathe by the inspection requirement of lathe point before booting, start air pump, when pressure reaches 0.2-0.4MPa, side Can be switched on examination punching；

S52: when mold matches mould, pay attention to punch and pilot pin height dimension, inspection steel band marks and thickness width size, on material strip Material frame is fixed, and guarantees feeding controller reliably working, and steel band is smoothed by levelling machine, adjusts the big of roll smoothing force with regulation handle It is small, it adjusts feed length and reaches 13.15mm；

S53: when die-filling, being first adjacent to locating pin for mould bases, and briquetting compresses lower die, then runs to slider of punch manually lower dead Point, and upper mold is compressed, punching machine closure height is adjusted, guarantees formed punch wedging cavity plate 1-2mm；

S54: in die trial, carrying out examination punching by 160-180 punching examination, and open coolant liquid water valve, cooling mold, while carrying out head Inspection works normally 2-4 minutes after qualified, lathe jig frequency is adjusted to 260-280 beats/min.

6. a kind of assembly method of timing chain according to claim 1, it is characterised in that: in the step S8, prestretching The concrete operations process of lower section is as follows:

S81: when pre- machine drawing works normally, whether each sprocket wheel for answering running check to engage with chain is in same plane, does not allow Chain has scratch phenomenon, adjusts reinforcing lever, guarantees prestretching fluctuation in 40-60N processing range；

S82: the chain after prestretching, every 500 for a batch, by technical staff in the case different location arbitrary extracting 2-4 item into Performing check, the chain being pulled through in advance first survey its overall length, then again through prestretching, measure its overall length, and the difference of front and back measured value twice exists Be within 0.1mm it is normal, it is then unqualified more than 0.1mm, need to carry out reworked processing；

S83: every time after replacement roller, it is necessary to carry out examination again and draw.

7. a kind of assembly method of timing chain according to claim 1, it is characterised in that: in the step S10, into When row ring head running-in, ring head piece will be beaten in place, must not be had and be thrown piece skew phenomenon, and the chain after ring head is immersed 3- in machinery oil 5min carries out painting oil lubrication, prevents from burning, and running-in to time, which has to wait for lathe, comes to a complete stop and carry out replacement chain again, prevents from crushing Hand.

8. a kind of assembly method of timing chain according to claim 1, it is characterised in that: in the step S11, rolling During school, detailed process are as follows:

S111: qualified chain will be pulled through and carried out visual examination one by one, discovery chain part has defect, crackle, machine wound, hair Thorn, corrosion, coining, major and minor axis and collapse defect when, should remove and replace qualified part；

S112: carrying out pin shaft snap for the chain after Visual appearance one by one on rolling riveter, and first 2-4 item is rolled in examination, observes pin shaft riveting Whether head meets the requirement of the pin shaft outer diameter, two sides symmetry of expansion 2%-4% at 10-20, while being not allow for taking off Riveting, leakage riveting phenomenon；

S113: will roll the chain after riveting and carry out ring head, cover nickel plating marker slip by hand, and label outward, is mended riveting and required to size, And guaranteeing that plunger both ends are lifted one's head uniformly, the flexibility at the position should not be destroyed；

Chain after ring head: being carried out secondary drawing flexibility one by one, and requires both ends while stretching by S114, later comparison section Number, annular assembly rear chain joint number should be the standard joint number of various products, must not more piece or few section；

S115: chain is flown excessively, carries out visual examination to chain later, and inspection requirements is wanted with the inspection in step S111 Ask identical.

9. a kind of assembly method of timing chain according to claim 1, it is characterised in that: in the step S12, cleaning Specific step is as follows for oiling:

S121: it before booting, requires to carry out short sound wave cleaning machine an inspection according to the inspection of lathe point, current value is adjusted to 3.5- Then 4.5A is switched on；

S122: after booting, the chain qualified to total inspection is cleaned, and removes greasy dirt and iron filings sundries caused by after assembling, chain Shelf is hung up, and is put into cleaning basket, cleaning basket is placed in the rinse bath of short sound wave cleaning machine, 3-5min is washed；

S123: the chain after cleaning immerses oiling in antirust oil groove after should dripping clean coal oil immediately, covers chain surface by oil completely Lid, uniformly coats antirust oil；

S124: the chain after oiling is put into progress 20-40s drying in drying tube, to guarantee the requirement of factory Storage period.