CN104551288A - Combination welding connection method for mandrels and end type parts of camshafts - Google Patents
Combination welding connection method for mandrels and end type parts of camshafts Download PDFInfo
- Publication number
- CN104551288A CN104551288A CN201410843458.3A CN201410843458A CN104551288A CN 104551288 A CN104551288 A CN 104551288A CN 201410843458 A CN201410843458 A CN 201410843458A CN 104551288 A CN104551288 A CN 104551288A
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- Prior art keywords
- mandrel
- class part
- solder
- welding
- solder ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000003466 welding Methods 0.000 title claims abstract description 40
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 229910000679 solder Inorganic materials 0.000 claims description 65
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 239000010930 yellow gold Substances 0.000 claims description 2
- 229910001097 yellow gold Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract 3
- 238000009825 accumulation Methods 0.000 abstract 1
- 238000002845 discoloration Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/005—Camshafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention belongs to the technical field of machining of parts, in particular to a combination welding connection method for mandrels and end type parts of camshafts. The method includes: abutting the end type part and the mandrel by means of cooperation of shaft holes, wherein a gap is reserved between butt-joint faces of the end type part and the mandrel; sleeving an annular welding flux in the butt-joint gap between the end type part and the mandrel, and performing high-temperature treatment; enabling molten welding flux to fill the connection gap between the end type part and the mandrel under the action of a capillary tube so as to realize firm metallurgical welding. Compared with traditional end welding processes such as laser welding, friction welding and the like, the method has the advantages of easiness in operation, high technical stability, low cost and the like, and the problems of oxidation discoloration, spattering and accumulation nonuniformity of welding fluxes in welding areas are avoided. When the method is used for sintered camshafts, welding of 'ends and mandrels' and welding of 'camshafts and mandrels' can be simultaneously completed during sintering, so that technical process is effectively shortened, and superiority is obvious.
Description
Technical field
The invention belongs to parts machining technical field, particularly the Combination Welding method of attachment of a kind of camshaft termination class part and mandrel.
Background technology
Camshaft belongs to engine air distribution system key components and parts.The common preparation technology of camshaft comprises casting, forging and assembled camshaft preparation technology.Wherein, assembled camshaft, it is a kind of novel camshaft combined type design preparation theory, first camshaft is resolved into several parts (as shown in Figure 1) such as mandrel 2, termination class part 1, cam 3, axle journal 4, end axle journal 5, carry out Material selec-tion and fine finishining respectively, through special process, each parts and mandrel are interconnected, obtain Combined hollow camshaft.Compared with traditional casting, forging method, assembled camshaft advantage is huge, comprising: 1) easily realize hollow structure, and loss of weight is obvious; 2) flexible design, production flexibility; 3) dimensional accuracy is high, and following process surplus is little.
The core technology of assembled camshaft is the interconnection technique of each parts and mandrel.At present, conventional interconnection technique can be divided into mechanical connection and metallurgical weld two class.Relative to mechanical connection (such as annular knurl assembling, hot charging, expand tube etc.), the feature of metallurgical weld is through high-temperature process, forms metallurgical binding between each parts and mandrel, and bonding strength is high, good reliability.
The representative technique of metallurgical weld technology is powder metallurgy combined sintering technique.The all parts of powder metallurgy combined sintering formula camshaft and the connection of mandrel are metallurgical weld mode.Wherein, the parts such as cam, axle journal are prepared by powdered metallurgical material, in sintering process, can produce liquid phase, and with mandrel close contact, form firmly metallurgical binding.And termination base part generally adopts steel (such as 45# steel), do not possess the ability producing liquid phase in sintering process, therefore cannot produce metallurgical weld with mandrel.For this termination base part, be generally use the techniques such as follow-up laser weld, friction welding (FW) or argon arc welding to weld termination.This extra welding sequence extends technological process on the one hand, add the demand of equipment, manpower, improve cost, on the other hand, oxidation blackening, the stacked solder of welding region are uneven, solder sputter causes the problem that camshaft aesthetic measure declines, time serious, also need to carry out extra processing grinding process.
Summary of the invention
The present invention is directed in prior art, the complex procedures in the welding procedure of termination base part and mandrel, cost be high, the problem of appearance poor, the Combination Welding method of attachment of a kind of low cost, easy-operating camshaft termination class part and mandrel is proposed.
The technical solution used in the present invention, specifically comprises the steps:
(1) solder is prepared into ring-type, obtains solder ring;
(2) termination class part and mandrel are processed into the form of shaft hole matching, and combine with solder ring, make solder ring be positioned at the inside of termination class part and mandrel docking site, do not expose;
(3) above stated assembly is carried out high-temperature process more than the melting temperature of solder used, make solder fusing, solder is entered between termination class part and the fit clearance of mandrel by capillarity and forms firmly metallurgical weld; And 5 ~ 120min is incubated in vacuum or reducing atmosphere;
(4) be cooled to room temperature, complete welding.
In described step (2), the assembled scheme of termination class part and mandrel, solder ring is: process one end of termination class part, makes it have protruding spindle nose; One end of mandrel processes a hole of matching with the spindle nose of above-mentioned projection, and in one end that this hole contacts with termination class part, processes one can hold chamfering in solder ring; Then, by the root of solder ring set at the spindle nose of above-mentioned projection, and spindle nose is inserted the hole of described mandrel, make solder ring be positioned at the position of core axle hole chamfering.
In described step (2), the assembled scheme of termination class part and mandrel, solder ring is: process one end of termination class part, make it have a blind hole; One end of mandrel and the blind hole of described termination class part form gap or interference fit, and process outer chamfering in one end that mandrel coordinates with described blind hole, in solder ring can be contained in by the size of this outer chamfering; Then, solder ring is placed in the blind via bottom of described termination class part, and this blind hole is inserted in the one end that mandrel be machined outer chamfering, make solder ring be positioned at the outer chamfering position of mandrel.
Described solder ring adopts solder wire to make, and the value footpath of solder wire is no more than the wall thickness of mandrel.
Described solder is fine copper, ormolu or yellow gold; The forming technology of solder ring is casting, extrusion molding, powder pressing or the directly curling shaping of use solder wire.
High-temperature process in described step (3) carries out in vacuum drying oven, tube furnace, net belt type sintering furnace or heat-treatment furnace.
Beneficial effect of the present invention is:
The advantages such as the method compares the termination welding procedures such as traditional Laser Welding, friction welding (FW), and have technique easy to operate, technology stability is good, and cost is low, and welding region does not exist problem of appearance such as stacked solder is irregular, splashing, oxidation stain.
It should be noted that, for powder metallurgy sintered formula camshaft, if when fusing point is used for lower than the solder of sintering temperature the welding method that this patent proposes, the welding of " termination-mandrel " and being welded in sintering circuit of " P/M cam/axle journal-mandrel " can be completed simultaneously, compare the termination welding procedure that Laser Welding, friction welding (FW) etc. are extra, technological process obtains to be shortened, cost reduces, and the problem of appearance such as stacked solder is irregular, splashing, oxidation stain that welding region does not exist, with the obvious advantage.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of camshaft involved in the present invention;
Fig. 2 is the assembling schematic diagram of the first scheme of method of attachment step (2) proposed by the invention.
Fig. 3 is the assembling schematic diagram of the first scheme of method of attachment step (2) proposed by the invention;
Fig. 4 is the welding assembly schematic diagram of the embodiment of the present invention.
Number in the figure:
1-termination class part; 2-mandrel; 3-cam; 4-axle journal; 5-end axle journal; 6-solder ring.
Detailed description of the invention
The invention provides the Combination Welding method of attachment of a kind of camshaft termination class part and mandrel, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
This is welded to connect method and adopts following steps:
(1) solder is prepared into ring-type, obtains solder ring 6;
(2) termination class part 1 and mandrel 2 are processed into the form of shaft hole matching, and combine with solder ring 6, make solder ring 6 be positioned at termination class part 1 and the inside of mandrel 2 docking site, do not expose;
(3) above stated assembly is carried out high-temperature process more than the melting temperature of solder used, make solder fusing, solder is entered between termination class part 1 and the fit clearance of mandrel 2 by capillarity and forms firmly metallurgical weld; And 5 ~ 120min is incubated in vacuum or reducing atmosphere;
(4) be cooled to room temperature, complete welding.
As shown in Figure 2, in step (2), termination class part 1 with the assembled scheme of mandrel 2, solder ring 6 can be: process one end of termination class part 1, makes it have protruding spindle nose; One end of mandrel 2 processes a hole of matching with the spindle nose of above-mentioned projection, and in one end that this hole contacts with termination class part, processes one can hold chamfering in solder ring 6; Then, solder ring 6 is enclosed within the root of the spindle nose of above-mentioned projection, and spindle nose is inserted the hole of described mandrel, make solder ring 6 be positioned at the position of core axle hole chamfering.
As shown in Figure 3, in step (2), termination class part 1 with the assembled scheme of mandrel 2, solder ring 6 can also be: process one end of termination class part 1, make it have a blind hole; One end of mandrel 2 and the blind hole of described termination class part 1 form gap or interference fit, and process outer chamfering in one end that mandrel 2 coordinates with described blind hole, in solder ring 6 can be contained in by the size of this outer chamfering; Then, solder ring 6 is placed in the blind via bottom of described termination class part 1, and this blind hole is inserted in the one end that mandrel 2 be machined outer chamfering, make solder ring 6 be positioned at the outer chamfering position of mandrel.
Fig. 4 is the welding assembly schematic diagram of the embodiment of the present invention.End axle journal 5 is positioned at one end of camshaft, and its material is 45# steel, can not produce liquid phase in sintering, therefore this end axle journal 5 can be considered as termination class part 1.According to this patent, first adopt the copper wire of diameter 1.50mm, blocked and bend to circular, for subsequent use as solder ring 6.Then, one end of end axle journal 5 is processed blind hole, blind hole internal diameter 24.05mm, degree of depth 12.00mm; Mandrel 2 one end of external diameter 24.00mm is processed the outer chamfering of a 2.50mm.Solder ring 6 is placed in end axle journal blind via bottom, then mandrel 2 is processed this blind hole of end insertion, until bottom, make solder ring 6 be positioned at the position of the outer chamfering of mandrel processing end.Finally, the parts after combinations thereof are put into net belt type sintering furnace and carries out high temperature sintering, sintering temperature 1100 DEG C, temperature retention time 60min, protective atmosphere is hydrogen, and after being cooled to room temperature, above-mentioned end axle journal 5 and mandrel 6 have formed firmly metallurgical weld.
Claims (6)
1. a Combination Welding method of attachment for camshaft termination class part and mandrel, it is characterized in that, the method comprises the steps:
(1) solder is prepared into ring-type, obtains solder ring;
(2) termination class part and mandrel are processed into the form of shaft hole matching, and combine with solder ring, make solder ring be positioned at the inside of termination class part and mandrel docking site, do not expose;
(3) above stated assembly is carried out high-temperature process more than the melting temperature of solder used, make solder fusing; And 5 ~ 120min is incubated in vacuum or reducing atmosphere;
(4) be cooled to room temperature, complete welding.
2. the Combination Welding method of attachment of a kind of camshaft termination class part and mandrel according to claim 1, it is characterized in that: in described step (2), the assembled scheme of termination class part and mandrel, solder ring is: process one end of termination class part, makes it have protruding spindle nose; One end of mandrel processes a hole of matching with the spindle nose of above-mentioned projection, and in one end that this hole contacts with termination class part, processes one can hold chamfering in solder ring; Then, by the root of solder ring set at the spindle nose of above-mentioned projection, and spindle nose is inserted the hole of described mandrel, make solder ring be positioned at the position of core axle hole chamfering.
3. the Combination Welding method of attachment of a kind of camshaft termination class part and mandrel according to claim 1, it is characterized in that: in described step (2), the assembled scheme of termination class part and mandrel, solder ring is: process one end of termination class part, make it have a blind hole; One end of mandrel and the blind hole of described termination class part form gap or interference fit, and process outer chamfering in one end that mandrel coordinates with described blind hole, in solder ring can be contained in by the size of this outer chamfering; Then, solder ring is placed in the blind via bottom of described termination class part, and this blind hole is inserted in the one end that mandrel be machined outer chamfering, make solder ring be positioned at the outer chamfering position of mandrel.
4. the Combination Welding method of attachment of a kind of camshaft termination class part and mandrel according to claim 1, is characterized in that: described solder ring adopts solder wire to make, and the value footpath of solder wire is no more than the wall thickness of mandrel.
5. the Combination Welding method of attachment of a kind of camshaft termination class part and mandrel according to claim 1, is characterized in that: described solder is fine copper, ormolu or yellow gold; The forming technology of solder ring is casting, extrusion molding, powder pressing or the directly curling shaping of use solder wire.
6. the Combination Welding method of attachment of a kind of camshaft termination class part and mandrel according to claim 1, is characterized in that: the high-temperature process in described step (3) carries out in vacuum drying oven, tube furnace, net belt type sintering furnace or heat-treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843458.3A CN104551288A (en) | 2014-12-30 | 2014-12-30 | Combination welding connection method for mandrels and end type parts of camshafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843458.3A CN104551288A (en) | 2014-12-30 | 2014-12-30 | Combination welding connection method for mandrels and end type parts of camshafts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104551288A true CN104551288A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410843458.3A Pending CN104551288A (en) | 2014-12-30 | 2014-12-30 | Combination welding connection method for mandrels and end type parts of camshafts |
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| CN (1) | CN104551288A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880771A (en) * | 2016-05-31 | 2016-08-24 | 广东东睦新材料有限公司 | Sintering welding process of high-air-tightness powder metallurgical part |
| CN106624321A (en) * | 2016-11-30 | 2017-05-10 | 中航动力股份有限公司 | Double-layer tube structure air conduit electron beam welding butt joint structure |
| CN107350473A (en) * | 2017-07-24 | 2017-11-17 | 重庆江洲粉末冶金科技有限公司 | A kind of method for improving powder metallurgical helical gear intensity |
| CN107876781A (en) * | 2017-12-11 | 2018-04-06 | 上海魁殊自动化科技有限公司 | It is a kind of based on powder sintered axial workpiece composite manufacturing method |
| CN107931619A (en) * | 2017-12-11 | 2018-04-20 | 上海魁殊自动化科技有限公司 | Cam pre-sintering base and its application method |
| CN111673220A (en) * | 2020-06-23 | 2020-09-18 | 西北有色金属研究院 | A kind of method for brazing and sealing of palladium alloy thin-walled tube |
| CN112620848A (en) * | 2020-12-25 | 2021-04-09 | 西安成立航空制造有限公司 | Vacuum brazing method for slender weld joint of hole shaft matched part |
| CN112761930A (en) * | 2019-11-04 | 2021-05-07 | 上海海立电器有限公司 | Connecting joint structure and compressor assembling method |
| CN112855304A (en) * | 2021-01-06 | 2021-05-28 | 北京有研粉末新材料研究院有限公司 | Camshaft signal panel combined structure and preparation method thereof |
| CN113369823A (en) * | 2021-06-30 | 2021-09-10 | 西安远航真空钎焊技术有限公司 | Method for preparing mosaic lamination based on vacuum brazing |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880771B (en) * | 2016-05-31 | 2018-09-11 | 广东东睦新材料有限公司 | A kind of high-air-tightness powdered metal parts sintering and welding process |
| CN105880771A (en) * | 2016-05-31 | 2016-08-24 | 广东东睦新材料有限公司 | Sintering welding process of high-air-tightness powder metallurgical part |
| CN106624321A (en) * | 2016-11-30 | 2017-05-10 | 中航动力股份有限公司 | Double-layer tube structure air conduit electron beam welding butt joint structure |
| CN106624321B (en) * | 2016-11-30 | 2019-05-17 | 中航动力股份有限公司 | A kind of double-layer barrel structural gap conduit electron beam welding banjo fixing butt jointing structure |
| CN107350473A (en) * | 2017-07-24 | 2017-11-17 | 重庆江洲粉末冶金科技有限公司 | A kind of method for improving powder metallurgical helical gear intensity |
| CN107876781A (en) * | 2017-12-11 | 2018-04-06 | 上海魁殊自动化科技有限公司 | It is a kind of based on powder sintered axial workpiece composite manufacturing method |
| CN107931619A (en) * | 2017-12-11 | 2018-04-20 | 上海魁殊自动化科技有限公司 | Cam pre-sintering base and its application method |
| CN107931619B (en) * | 2017-12-11 | 2019-11-29 | 温岭市鼎力标准件有限公司 | Cam is pre-sintered base and its application method |
| CN112761930A (en) * | 2019-11-04 | 2021-05-07 | 上海海立电器有限公司 | Connecting joint structure and compressor assembling method |
| CN111673220A (en) * | 2020-06-23 | 2020-09-18 | 西北有色金属研究院 | A kind of method for brazing and sealing of palladium alloy thin-walled tube |
| CN112620848A (en) * | 2020-12-25 | 2021-04-09 | 西安成立航空制造有限公司 | Vacuum brazing method for slender weld joint of hole shaft matched part |
| CN112855304A (en) * | 2021-01-06 | 2021-05-28 | 北京有研粉末新材料研究院有限公司 | Camshaft signal panel combined structure and preparation method thereof |
| CN113369823A (en) * | 2021-06-30 | 2021-09-10 | 西安远航真空钎焊技术有限公司 | Method for preparing mosaic lamination based on vacuum brazing |
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Application publication date: 20150429 |