CN106881634A - A kind of processing method of steel part bushing stepped hole axiality - Google Patents
A kind of processing method of steel part bushing stepped hole axiality Download PDFInfo
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- CN106881634A CN106881634A CN201510910570.9A CN201510910570A CN106881634A CN 106881634 A CN106881634 A CN 106881634A CN 201510910570 A CN201510910570 A CN 201510910570A CN 106881634 A CN106881634 A CN 106881634A
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- emery wheel
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- axiality
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention discloses a kind of processing method of steel part bushing stepped hole axiality, the method is used
S145
High-precision numerical control internal grinder is simultaneously combined
S145
The powerful programing function of high-precision numerical control internal grinder realizes the method that steel part bushing clamped one time processes two stepped holes, datum level is clamped with the cylindrical positioning for processing of part during clamping, from soft pawl fixture；And the soft pawl of reconditioning makes soft pawl bounce cannot be greater than the required precision of part；Size, roughness, cylindricity and axiality the requirement suitable emery wheel of selection according to part, it is using diamond pen that the equating of grinding wheel cylindrical surface is whole；Procedure is write, procedure is input into
S145
High-precision numerical control internal grinder,
S145
The three-dimensional coordinate of processing part is registered on high-precision numerical control internal grinder
0
Point position；Emery wheel is adjusted to three-dimensional coordinate
0
Point position, starts
S145
Numeral-controlled internal grinder is automatically performed processing according to program.The present invention makes the passing rate of processing of part by existing
10-60%
Bring up to
90%
More than.
Description
Technical field
The present invention relates to a kind of processing method of steel part bushing stepped hole axiality, belong to high-precision part process technology neck
Domain.
Background technology
In certain new product, there are a kind of steel part lining cover parts, its endoporus is two kinds of stepped holes of different-diameter, part pair
Axiality requirement between macropore and aperture is very high.The part higher for axiality requirement, processing method traditional at present
Mainly have following two：A kind of is the method using numerically controlled lathe or engine lathe clamped one time processing macropore and aperture；It is another
It is the method for using axiality mill amendment holes axiality or bounce to plant.Steel of the above two method for processing high-hardness
For material, crudy is very unstable, and time processing qualification rate can only achieve 10-60%, due to the hardness requirement of steel part bushing
Higher, heat treatment deformation is larger, and amendment of often being beated during final finishing does not reach requirement, and difficulty of processing is quite big.Cause to add
Work is stagnated, and task cannot pay.
The content of the invention
It is an object of the present invention to provide a kind of processing method of steel part bushing stepped hole axiality, to solve new product
Vital part qualification rate is low in development process, it is impossible to ensure the technical barrier that task is paid, so as to overcome the deficiencies in the prior art.
The technical proposal of the invention is realized in this way：
A kind of processing method of steel part bushing stepped hole axiality of the invention is that the method uses S145 high precision numerical control inner circles
Grinding machine and the powerful programing function with reference to S145 high-precision numerical control internal grinders realize that steel part bushing clamped one time processes two steps
The method in hole, to ensure the axiality of two stepped holes；Datum level is clamped with the cylindrical positioning for processing of part during clamping, from soft
Pawl fixture；And the soft pawl of reconditioning makes soft pawl bounce cannot be greater than the required precision of part；Size, roughness according to part, cylinder
Degree and the axiality requirement suitable emery wheel of selection, using diamond pen by the equating of grinding wheel cylindrical surface is whole can not be tapered；Write and add
Engineering sequence, is input into S145 high-precision numerical control internal grinders, and registered on S145 high-precision numerical control internal grinders by procedure
Process 0 position of three-dimensional coordinate of part；And by emery wheel position adjustment to 0 position of three-dimensional coordinate, start the high-precision number of degrees of S145
Control internal grinder is automatically performed process according to program.
In preceding method, it is that parts fixation is ground in S145 high precision numerical controls inner circle that the clamped one time processes two stepped holes
After on the soft pawl of bed, after processing a hole in two stepped holes, it is impossible to part is unloaded from soft pawl, second is directly carried out
The processing in individual hole, to ensure the axiality requirement of two stepped holes.
In preceding method, the suitable emery wheel of selection is the external diameter for selecting emery wheel, the diameter of pole wheel, the material of emery wheel
Material, the granularity of emery wheel material；Internal diameter selection of the external diameter of emery wheel according to two stepped holes in part；Processing φ 10mm above endoporus
When, emery wheel external diameter=（0.6~0.8）× processing aperture size；When processing the deep and long hole of below φ 10mm, using electroplating cubic nitrogen
Change the electroplating abrasion wheel of boron；The diameter of pole wheel should be 0.8~0.9 times of processing aperture size.
In preceding method, the material of the emery wheel is selected according to the material of processing part；The granularity of emery wheel material according to plus
The surface roughness requirements selection of work part；When Part Surface Roughness requirement is more than Ra0.4, selection granularity is 46-80's
Emery wheel；When Part Surface Roughness is less than Ra0.4, selection granularity is the emery wheel of 100-220.
In preceding method, the procedure of writing is mainly control grinding method and the amount of feeding；When allowance is more than
During 0.1mm, each amount of feeding is 0.05mm；When allowance is 0.05~0.1mm, each amount of feeding is 0.02mm；
When allowance is less than or equal to 0.05mm, each amount of feeding is 0.01mm.
In preceding method, the S145 high-precision numerical control internal grinders use coordinate direction to fix, and 0 point of coordinate is not true
Fixed moving coordinate system；During 0 position of three-dimensional coordinate of registration processing part, selection macropore outer face is the coordinate " 0 " of Z coordinate
Point, the horizontal plane where Central of the parts axis is Y-coordinate in coordinate " 0 " point, the line that grinding wheel cylindrical is contacted with inner bore of part surface
The vertical plane at place is coordinate " 0 " point of X-coordinate.
It is described that emery wheel position adjustment to 0 position of three-dimensional coordinate is used into manual adjusting style in preceding method；Pass through
The traverse speed of S145 high-precision numerical control internal grinders handle control emery wheel is by emery wheel outer face and part macropore outer face
Overlap 0 point of Z coordinate of registration；The position for adjusting emery wheel axis by handle overlaps with Central of the parts line, registers 0 point of Y-coordinate；Pass through
Handle controls the length feed speed of emery wheel, makes emery wheel outer rim and inner bore of part EDGE CONTACT, registers 0 point of X-coordinate.
In preceding method, during the registration X-coordinate 0, the actual size and grinding wheel cylindrical of part aperture are first measured
Actual size, calculates difference in size Δ D；After emery wheel enters aperture from small hole center, the Δ D/2-0.02mm that crosses feed carries out small
Hole examination processing；According to the variable quantity of hole size after examination processing, determine whether emery wheel touches aperture hole wall；It is interior after such as trying to process
Size unchanged then explanation emery wheel in hole repeats feed not in contact with to aperture hole wall, until hole size changes, by this moment
Coordinate value is set to 0 point of the X-coordinate of aperture.
By adopting the above-described technical solution, the present invention is compared with prior art, the present invention breaches steel part bushing step
Hole axiality processing can only be processed using traditional numerically controlled lathe or engine lathe clamped one time and repaiied using axiality mill
Positive holes axiality or the method for bounce, are that steel part bushing stepped hole axiality requirement part higher adds on numeral-controlled internal grinder
Work has explored a new manufacturing process.The passing rate of processing of part is set to have brought up to more than 90% by existing 10-60%.Protect
Card product quality, has saved processing cost.Realizing high accuracy steel part bushing stepped hole axiality no more than 0.005mm first will
The processing asked, the part processing of such axiality requirement specifies direction after being.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the structural representation of the embodiment of the present invention 2；
Fig. 3 is the structural representation of the embodiment of the present invention 3.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples, but not as to of the invention any
Limitation.
A kind of processing method of steel part bushing stepped hole axiality of the invention is that the method uses S145 high precision numerical controls
Internal grinder and the powerful programing function with reference to S145 high-precision numerical control internal grinders realize steel part bushing clamped one time processing two
The method of stepped hole, to ensure the axiality of two stepped holes；Datum level, choosing are clamped with the cylindrical positioning for processing of part during clamping
With soft pawl fixture；And the soft pawl of reconditioning makes soft pawl bounce cannot be greater than the required precision of part；Size, roughness according to part,
Cylindricity and the axiality requirement suitable emery wheel of selection, using diamond pen by the equating of grinding wheel cylindrical surface is whole can not be tapered；Compile
Procedure is write, procedure is input into S145 high-precision numerical control internal grinders, and on S145 high-precision numerical control internal grinders
0 position of three-dimensional coordinate of registration processing part；And by emery wheel position adjustment to 0 position of three-dimensional coordinate, start S145 high-precision
Degree digital control internal grinder is automatically performed process according to program.It is that parts fixation exists that the clamped one time processes two stepped holes
After on the soft pawl of S145 high-precision numerical control internal grinders, after processing a hole in two stepped holes, it is impossible to by part from soft
Unloaded on pawl, directly carry out second processing in hole, to ensure the axiality requirement of two stepped holes.The suitable emery wheel of selection
It is the external diameter for selecting emery wheel, the diameter of pole wheel, the material of emery wheel, the granularity of emery wheel material；The external diameter of emery wheel is according in part
The internal diameter selection of two stepped holes；During processing φ 10mm above endoporus, emery wheel external diameter=（0.6~0.8）× processing aperture size；Plus
During the deep and long hole of below work φ 10mm, using the electroplating abrasion wheel of electroplating cubic boron nitride；The diameter of pole wheel should be 0.8~0.9
Processing aperture size again.Material selection of the material of emery wheel according to processing part；The granularity of emery wheel material is according to processing part
Surface roughness requirements selection；When Part Surface Roughness requirement is more than Ra0.4, selection granularity is the emery wheel of 46-80；When
When Part Surface Roughness is less than Ra0.4, selection granularity is the emery wheel of 100-220.Write procedure and be mainly control grinding
Mode and the amount of feeding；When allowance is more than 0.1mm, each amount of feeding is 0.05mm；When allowance be 0.05~
During 0.1mm, each amount of feeding is 0.02mm；When allowance is less than or equal to 0.05mm, each amount of feeding is
0.01mm.S145 high-precision numerical control internal grinders use coordinate direction to fix, 0 point of uncertain moving coordinate system of coordinate；
During 0 position of three-dimensional coordinate of registration processing part, selection macropore outer face is coordinate " 0 " point of Z coordinate, Central of the parts axis
The horizontal plane at place be Y-coordinate in coordinate " 0 " point, the vertical plane where the line that grinding wheel cylindrical is contacted with inner bore of part surface is X
Coordinate " 0 " point of coordinate.It is described that emery wheel position adjustment to 0 position of three-dimensional coordinate is used into manual adjusting style；By S145
The traverse speed of high-precision numerical control internal grinder handle control emery wheel overlaps emery wheel outer face with part macropore outer face
0 point of Z coordinate of registration；The position for adjusting emery wheel axis by handle overlaps with Central of the parts line, registers 0 point of Y-coordinate；By handle
The length feed speed of emery wheel is controlled, makes emery wheel outer rim and inner bore of part EDGE CONTACT, register 0 point of X-coordinate.0 point of X-coordinate of registration
When, the actual size of part aperture and the actual size of grinding wheel cylindrical are first measured, calculate difference in size Δ D；Emery wheel is from aperture
After center enters aperture, the Δ D/2-0.02mm that crosses feed carries out aperture examination processing；According to the change of hole size after examination processing
Amount, determines whether emery wheel touches aperture hole wall；As after trying processing hole size it is unchanged if illustrate emery wheel not in contact with to aperture
Hole wall, repeats feed, until hole size changes, coordinate value at this moment is set to 0 point of the X-coordinate of aperture.
Processing method supplementary notes of the invention
1. prepare before processing
A, lathe, fixture and positioning method
Machine tool is numeral-controlled internal grinder, model：S145.The characteristics of structure and numeral-controlled internal grinder according to part, determines fixed
Position installation way：Datum level is clamped with the cylindrical positioning for processing of part, is fixture from soft pawl.The soft side of pawl one is used before processing
Face can avoid crushing part, it can in addition contain according to the soft pawl of centering situation boring after parts fixation.
, clamping centering
The soft pawl of benchmark peripheral milling is clamped by part, soft pawl bounce cannot be greater than 0.01mm.
By parts fixation on the grinding machine headstock.Must not note and crush part, folder deformation.
Within centering endoporus is to the bounce 0.01mm at center.If the requirement of skill bar is very high, and (axiality or bounce are required
0.005mm is maximum) part answer centering within 0.005mm.
, finishing emery wheel
Check whether the position of diamond pen installs correctly, whether nib is smooth.
Programming finishing emery wheel.
Note：If electroplating cubic boron nitride emery wheel does not carry out the finishing of emery wheel then.Because：1st, cubic boron nitride is hard
Degree is high, and diamond pen is not obvious to its finishing effect；2nd, the coating of electroplating abrasion wheel is very thin, generally unilateral only 0.3~0.5mm,
Repeatedly finishing abrasion of grinding wheel is fast.
Check the finishing situation of emery wheel.Answer equating whole in grinding wheel cylindrical surface, it is impossible to tapered.
The selection of numerical control internal grinder emery wheel
A, selection emery wheel：
Processing steel part class step bushing typically processes macropore and aperture respectively from two emery wheels.But when two bore dias are more or less the same
When, it is possible to use an emery wheel is ground to holes.
, emery wheel material selection
Material according to part to be processed selects the material of suitable emery wheel.
Table one：Conventional abrasive material and range of application
The selection of C, abrasive grain
The granularity of abrasive material represents the size of abrasive particulate size, and abrasive grain scope is represented with numeral（It is shown in Table two）.
Table two：Part granularity and the abrasive particle actual size table of comparisons
The granularity of emery wheel directly influences the surface roughness and grinding efficiency of part.In general, ground with the emery wheel of coarseness
Grinding efficiency is high when cutting, but the roughness of piece surface is poor；During with fine-grained wheel grinding, Part Surface Roughness is preferable,
But grinding efficiency is low.Therefore, on the premise of Part Surface Roughness requirement is met, should try one's best from the thicker emery wheel of granularity,
To ensure grinding efficiency higher.For Part Surface Roughness part of the requirement more than Ra0.4, it is proposed that selection granularity is 46-
80 emery wheel；Part for Part Surface Roughness less than Ra0.4, it is proposed that selection granularity is the emery wheel of 100-220.
Table three：Conventional granularity and the scope of application
Table four：Typical Steel material and the material and the granularity table of comparisons from emery wheel（For reference）
Remarks：“（）" in for CBN granularity.
, grinding wheel diameter selection
Grinding wheel diameter is an important elements for influenceing processing efficiency.In general, grinding wheel diameter is bigger, and cutting force is bigger, cuts
Cut speed faster, processing efficiency is higher.Suitable sand should be selected according to the hole size of part to be processed during selection emery wheel
Wheel is cylindrical.Generally, during the endoporus of processing φ more than 10, emery wheel external diameter=（0.6~0.8）× processing aperture size；Processing less than 10
Deep and long hole（The endoporus of interior hole length/diameter of bore >=7）, should be using the electroplating abrasion wheel of electroplating cubic boron nitride, the sand of emery wheel
Wheel bar should try one's best slightly（Generally 0.8~0.9 times of processing aperture size）, otherwise be ground when pole wheel insufficient strength, influence plus
Working medium amount.
The establishment of program
The selection of the amount of feeding and grinding method in A, program composition, is performed by table five.
Table five, steel part class step bushing machined parameters
The selection processing of program composition medium plain emery wheel tool path pattern, the not only linearity of part and ovality precision when the method is processed
It is higher, and the surface roughness of part is also fine, disclosure satisfy that the requirement of design.
, to knife
Registration coordinate " 0 " point
Mill uses coordinate direction to fix in numerical control, the uncertain moving coordinate system of coordinate " 0 " point.Generally select big outer end of hole
Face is Z coordinate " 0 " point, and the horizontal plane where Central of the parts axis is Y-coordinate " 0 " point, and grinding wheel cylindrical connects with inner bore of part surface
Vertical plane where tactile line is X-coordinate " 0 " point.Z coordinate mainly influences the stroke of emery wheel in S145, and Y-coordinate mainly influences sand
The height of wheel, X-coordinate mainly influences the length feed of emery wheel（"+" is withdrawing, and "-" is feed）.
Coordinate " 0 " point of each coordinate is registered, it is necessary to emery wheel is close to part, and is deep into inner bore of part.In this process
In in order to prevent emery wheel from knocking part, it is necessary to use process control unit（It is commonly called as handle）The speed of crossing feed of emery wheel is controlled manually
Degree.When emery wheel is away from more than part outer face 10mm, emery wheel translational speed is 0.1mm/ times；Emery wheel is away from 1~10mm of part outer face
When, emery wheel translational speed is 0.05mm/ times；When emery wheel is within the 1mm of part outer face, emery wheel translational speed is no more than
0.02mm/ times.When emery wheel is apart from 5~10mm of part, it is necessary to suspend emery wheel feed, with eye observation emery wheel near part
Situation.If it find that emery wheel may knock part, emery wheel should be resetted at once.Again feed after adjustment emery wheel location parameter, really
Protecting when emery wheel crosses feed can not knock part.When emery wheel outer face overlaps with part macropore outer face（Visually）When, registration Z sits
Mark " 0 " point.The position for adjusting emery wheel axis overlaps with Central of the parts line（Visually）, register Y-coordinate " 0 " point.Register the seat of X-coordinate
Mark " 0 " point is relatively difficult.Register coordinate " 0 " point of X-coordinate, it is necessary to which emery wheel is deep into inside endoporus to be processed.Registration
During coordinate " 0 " point of macropore X-coordinate, with the distance between eye observation grinding wheel cylindrical and inner bore of part L, emery wheel is controlled with handle
Length feed speed.During L >=0.3mm, feed velocity must not exceed 0.15mm/ times；During 0.05mm≤L ＜ 0.3mm, feed speed
Degree must not exceed 0.02mm/ times；During L ＜ 0.05mm, feed velocity must not exceed 0.01mm/ times.If visual emery wheel is touched
Part, then rotate the chuck of clamping parts, judges whether part is actual with inner bore of part surface and contacts.The X for having registered macropore sits
Emery wheel should be exited part after target coordinate " 0 " point, then can just carry out coordinate " 0 " the point registration of aperture X-coordinate.It is small registering
During coordinate " 0 " point of hole X-coordinate, emery wheel must enter aperture from small hole center.Because step aperture is typically located at what be can't see
Position, only from small hole center feed, just can guarantee that emery wheel discord part collision.During registration, the reality of part aperture is first measured
The actual size of border size and grinding wheel cylindrical, calculates difference in size Δ D.After emery wheel enters aperture from small hole center, cross feed
Δ D/2-0.02mm carries out aperture examination processing.Measure whether hole size changes on lathe after processing.If hole size is not
Become, illustrate emery wheel not in contact with to aperture, feed Δ t（The value of Δ t is relevant with allowance, is shown in Table six）After remeasure.Such as
Fruit hole size becomes big, illustrates that emery wheel is cut to inner bore of part, then coordinate value at this moment can be just set to the X-coordinate of aperture
Coordinate " 0 " point.
Table six：Δ t and the allowance table of comparisons（For reference）
| Allowance（mm） | ≤0.05 | 0.05~0.1 | ＞ 0.1 |
| Δt（mm） | 0.01 | 0.02 | 0.05 |
4. technological process method
Heat treatment -- → inner bore grinding → cylindrical grinding → deburring → mill endoporus；
Inner bore grinding and cylindrical grinding operation are that have an axiality preferably to clamp benchmark to grind endoporus, convenient when endoporus is ground
Centering part and the cylindricity to part improve a lot.
Embodiment 1
Quenching class part is as shown in figure 1, material is 9Cr18.Heat treatment requirements：Hardness >=56HRC.The part is thin-walled parts,
Easily it is deformed in process.Using the qualification rate of processing method part of the invention more than 98%.
Embodiment 2
Carburizing class part is as shown in Fig. 2 material：12CrNi3A, heat treatment requirements：0.6~0.8mm of carburizing depth（Design drawing will
Seek 0.4~0.7mm）, hardness >=56HRC.The processing difficulties of the part are that the holes of φ 4 are very small, and axiality is difficult to, it is difficult to
Ensure.Using processing method of the invention, the cylindricity and macropore of part macropore disclosure satisfy that technique will to the jitter values of aperture
Ask, and crudy stabilization.Because the aperture positions of φ 4 are deep, it is necessary to the length of pole wheel is than larger, therefore, pole wheel
Toughness is poor, causes the cylindricity and surface roughness in the holes of φ 4 poor, need to stay certain allowance（Usual needs 0.02~
0.03mm）Uprighting is ground in 100 operations.Qualification rate is 96%.
Embodiment 3
Nitriding class part is as shown in figure 3, material：4Cr14Ni14W2Mo, heat treatment requirements：Depth of nitration >=0.1mm（Design will
Depth of nitration is asked to be not less than 0.07mm）, hardness >=700HV.The processing difficulties of this kind of part are the surpluses of inner bore of part after nitriding
Very little（Unilateral balance of 0.03~0.05mm）If part nitriding deformation is excessive, it is easy to cause inner bore of part to grind not,
Cause part rejection.Therefore, control part nitriding deformation is very crucial.By the cold and hot coordination with hotlist subsidiary factory, machine bonus point factory
Ensure axiality φ 0.01 before heat treatment, hotlist subsidiary factory ensures axiality φ 0.03 after heat treatment.By in numerical control after heat treatment
Mill is by the correction of part axiality in φ 0.005max.The axiality of holes disclosure satisfy that design drawing requirement after grinding out.
After using technical scheme, the steel part bushing high-precision processing of inner bore of step axiality is finally realized,
The examination and test of products is qualified and is delivered for use.Follow-up zero meets design requirement by double gap precision pair low temperature manoeuvring test.
Technical scheme reasonably make use of the existing process equipment of unit, overcome extraneous difficulty, not only make
Product timely processes payment, and the also machining process ability aspect to unit is made that contribution, makes adding for steel part bushing stepped hole
Work is no longer limited to traditional lathe and grinding, it is ensured that crudy, has saved processing cost.Most great meaning is：
The processing of high accuracy steel part bushing stepped hole axiality no more than 0.005mm requirements, such axiality after being are realized first
It is required that part processing specify direction.
Claims (8)
1. a kind of processing method of steel part bushing stepped hole axiality, it is characterised in that：The method uses S145 high precision numerical controls
Internal grinder and the powerful programing function with reference to S145 high-precision numerical control internal grinders realize steel part bushing clamped one time processing two
The method of stepped hole, to ensure the axiality of two stepped holes；Datum level, choosing are clamped with the cylindrical positioning for processing of part during clamping
With soft pawl fixture；And the soft pawl of reconditioning makes soft pawl bounce cannot be greater than the required precision of part；Size, roughness according to part,
Cylindricity and the axiality requirement suitable emery wheel of selection, using diamond pen by the equating of grinding wheel cylindrical surface is whole can not be tapered；Compile
Procedure is write, procedure is input into S145 high-precision numerical control internal grinders, and on S145 high-precision numerical control internal grinders
0 position of three-dimensional coordinate of registration processing part；And by emery wheel position adjustment to 0 position of three-dimensional coordinate, start S145 high-precision
Degree digital control internal grinder is automatically performed process according to program.
2. the processing method of steel part bushing stepped hole axiality according to claim 1, it is characterised in that：The clamped one time
Process two stepped holes be by parts fixation on the soft pawl of S145 high-precision numerical control internal grinders after, in processing two stepped holes
After one hole, it is impossible to part is unloaded from soft pawl, second processing in hole is directly carried out, to ensure the coaxial of two stepped holes
Degree is required.
3. the processing method of steel part bushing stepped hole axiality according to claim 2, it is characterised in that：The selection is suitable
Emery wheel be select emery wheel external diameter, the diameter of pole wheel, the material of emery wheel, the granularity of emery wheel material；The external diameter of emery wheel according to
The internal diameter selection of two stepped holes in part；During processing φ 10mm above endoporus, emery wheel external diameter=（0.6~0.8）× processing aperture chi
It is very little；When processing the deep and long hole of below φ 10mm, using the electroplating abrasion wheel of electroplating cubic boron nitride；The diameter of pole wheel should be 0.8
~0.9 times of processing aperture size.
4. the processing method of steel part bushing stepped hole axiality according to claim 3, it is characterised in that：The material of the emery wheel
Expect the material selection according to processing part；Surface roughness requirements selection of the granularity of emery wheel material according to processing part；When zero
When part surface roughness requirements are more than Ra0.4, selection granularity is the emery wheel of 46-80；When Part Surface Roughness is less than Ra0.4
When, selection granularity is the emery wheel of 100-220.
5. the processing method of steel part bushing stepped hole axiality according to claim 4, it is characterised in that：It is described to write processing
Program is mainly control grinding method and the amount of feeding；When allowance is more than 0.1mm, each amount of feeding is 0.05mm；When
When allowance is 0.05~0.1mm, each amount of feeding is 0.02mm；When allowance is less than or equal to 0.05mm, often
The secondary amount of feeding is 0.01mm.
6. the processing method of steel part bushing stepped hole axiality according to claim 5, it is characterised in that：The S145 is high-precision
Degree digital control internal grinder uses coordinate direction to fix, 0 point of uncertain moving coordinate system of coordinate；The three of registration processing part
During 0 position of dimension coordinate, selection macropore outer face is coordinate " 0 " point of Z coordinate, and the horizontal plane where Central of the parts axis is Y
Coordinate is coordinate " 0 " point of X-coordinate in coordinate " 0 " point, the vertical plane where the line that grinding wheel cylindrical is contacted with inner bore of part surface.
7. the processing method of steel part bushing stepped hole axiality according to claim 6, it is characterised in that：It is described by emery wheel position
Put to adjust to 0 position of three-dimensional coordinate and use manual adjusting style；Sand is controlled by S145 high-precision numerical control internal grinders handle
Emery wheel outer face is overlapped and registers 0 point of Z coordinate by the traverse speed of wheel with part macropore outer face；Emery wheel is adjusted by handle
The position of axis overlaps with Central of the parts line, registers 0 point of Y-coordinate；The length feed speed of emery wheel is controlled by handle, makes emery wheel
Outer rim and inner bore of part EDGE CONTACT, register 0 point of X-coordinate.
8. the processing method of steel part bushing stepped hole axiality according to claim 7, it is characterised in that：The registration X sits
When marking at 0, the actual size of part aperture and the actual size of grinding wheel cylindrical are first measured, calculate difference in size Δ D；Emery wheel from
After small hole center enters aperture, the Δ D/2-0.02mm that crosses feed carries out aperture examination processing；According to hole size after examination processing
Variable quantity, determines whether emery wheel touches aperture hole wall；Hole size is unchanged after trying processing, illustrates emery wheel not in contact with arriving
Aperture hole wall, repeats feed, until hole size changes, coordinate value at this moment is set to 0 point of the X-coordinate of aperture.
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| CN107491039A (en) * | 2017-08-17 | 2017-12-19 | 长治清华机械厂 | A kind of process technology for ensureing servo valve body inner bore axiality |
| CN109551308A (en) * | 2018-12-04 | 2019-04-02 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of processing method of high-precision valve component |
| CN110202422A (en) * | 2019-06-21 | 2019-09-06 | 大连理工大学 | Big aspect ratio stepped hole grinding processing method |
| CN110202423A (en) * | 2019-06-21 | 2019-09-06 | 大连理工大学 | A kind of big aspect ratio ladder hole forming method |
| CN110509115A (en) * | 2019-08-27 | 2019-11-29 | 江阴塞特精密工具有限公司 | A kind of the high-precision grinding technique and application of elongated shaft |
| CN110666586A (en) * | 2019-10-18 | 2020-01-10 | 上海临港新兴产业企业服务有限公司 | Numerical control machine tool machining zero-defect inspection method |
| CN113635147A (en) * | 2021-07-20 | 2021-11-12 | 江苏华东砂轮有限公司 | Finish machining device and finish machining method for inner circle and outer circle of grinding wheel |
| CN114932463A (en) * | 2022-07-08 | 2022-08-23 | 重庆红江机械有限责任公司 | Method for grinding interrupted cylindrical surface |
| CN116460546A (en) * | 2023-05-23 | 2023-07-21 | 宜昌宇能精密科技有限公司 | Machining method for spindle stepped hole with window |
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| CN113635147A (en) * | 2021-07-20 | 2021-11-12 | 江苏华东砂轮有限公司 | Finish machining device and finish machining method for inner circle and outer circle of grinding wheel |
| CN114932463A (en) * | 2022-07-08 | 2022-08-23 | 重庆红江机械有限责任公司 | Method for grinding interrupted cylindrical surface |
| CN114932463B (en) * | 2022-07-08 | 2024-01-30 | 重庆红江机械有限责任公司 | Intermittent cylindrical surface grinding method |
| CN116460546A (en) * | 2023-05-23 | 2023-07-21 | 宜昌宇能精密科技有限公司 | Machining method for spindle stepped hole with window |
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