CN106955960A - Cold upsetting die of car and its processing technology - Google Patents
Cold upsetting die of car and its processing technology Download PDFInfo
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- CN106955960A CN106955960A CN201710354935.3A CN201710354935A CN106955960A CN 106955960 A CN106955960 A CN 106955960A CN 201710354935 A CN201710354935 A CN 201710354935A CN 106955960 A CN106955960 A CN 106955960A
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- endoporus
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- 238000012545 processing Methods 0.000 title claims abstract description 38
- 238000005516 engineering process Methods 0.000 title claims abstract description 27
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 75
- 238000009415 formwork Methods 0.000 claims abstract description 55
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 claims abstract description 7
- 238000005496 tempering Methods 0.000 claims description 20
- 238000005520 cutting process Methods 0.000 claims description 19
- 238000010791 quenching Methods 0.000 claims description 19
- 230000000171 quenching effect Effects 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 238000005255 carburizing Methods 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000007514 turning Methods 0.000 claims description 16
- 238000003754 machining Methods 0.000 claims description 12
- 238000005242 forging Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 101000712974 Homo sapiens Ras association domain-containing protein 7 Proteins 0.000 claims description 4
- 102100033241 Ras association domain-containing protein 7 Human genes 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000010892 electric spark Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000012536 packaging technology Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000010009 beating Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010273 cold forging Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of cold heading die and its processing technology.The cold-heading grinding tool includes housing and internal model, the housing includes formwork, the shoulder hole of two end faces of insertion formwork is provided with formwork, the small end end of shoulder hole is provided with conical section, conical section is in the upper surface of formwork, the big end of shoulder hole is in the lower surface of formwork, internal model includes the reinforcing ring of the taper coordinated with conical section inwall, interior die is installed in reinforcing ring, reinforcing ring side is provided with the axial cut-outs of insertion reinforcing ring surfaces externally and internally, it is provided with after the internal model contradicted with internal model lower end and pads in shoulder hole below internal model, pad lower section is provided with the screw element being threadedly coupled with housing after internal model, screw element, which pushes against pad after internal model, to be shunk reinforcing ring and clamps interior die.The cold upsetting die of car can realize the disassembly and assembly between core rod and formwork more conveniently, while having higher precision.The processing technology of the mould can be processed to all parts of mould more conveniently, make die life longer.
Description
Technical field
The present invention relates to mould, more particularly to a kind of cold heading die and its processing technology.
Background technology
The continuous lifting to process velocity and Investment in fastener industry high-end customer pair with cold-heading production manufacturing equipment
The continuous improvement of product technology requirement, cold upsetting die of car is original, which to manufacture and design precision and loss situation, can not meet existing
Quick production, it is quick remodel and process manufacturing capacity the need for.
At present, the U of Publication No. CN 202387902 Chinese patent discloses a kind of manufacture different length specification product and fallen
The cold upsetting die of car and processing method at angle, it includes core rod, die sleeve, swivel nut and push rod, and core rod includes mold core head, cushion block, core rod
Forming section and core rod afterbody, core rod each several part are provided with through hole.This cold upsetting die of car core rod is arranged on mould by interference fit
In-core, will make core rod and die sleeve keep preferable concentricity to load, if concentricity is present between core rod and die sleeve when installing core rod
Larger deviation, on the one hand can influence the quality of the product of cold-heading molding, on the other hand can influence the use longevity of core rod and die sleeve
Life.Additionally due to core rod is consumable accessory, need to use larger thrust by core rod from die sleeve after larger abrasion occurs for core rod
Inside exit and then change core rod from new again.Due to being interference fit between core rod and die sleeve, so also holding in Renewal process
It is easily caused die sleeve to destroy, assembly precision and actual life between influence core rod and die sleeve.
The content of the invention
In view of the shortcomings of the prior art, first purpose of the invention is to provide a kind of cold upsetting die of car, can be more
The disassembly and assembly between core rod and formwork is conveniently realized, while having higher precision.
The present invention above-mentioned technical purpose technical scheme is that：A kind of cold upsetting die of car, including shell
Body and internal model, it is characterized in that：The housing includes the shoulder hole that two end faces of insertion formwork are provided with formwork, formwork, ladder
The small end end in hole is provided with conical section, and conical section is in the upper surface of formwork, and the big end of shoulder hole is in the lower surface of formwork, interior
Mould includes being provided with interior die in the reinforcing ring of the taper coordinated with conical section inwall, reinforcing ring, and reinforcing ring side, which is provided with, to be passed through
It is provided with after the internal model contradicted with internal model lower end and pads in shoulder hole below the axial cut-outs of logical reinforcing ring surfaces externally and internally, internal model,
Pad lower section is provided with the screw element being threadedly coupled with housing after internal model, and screw element, which pushes against pad after internal model, makes reinforcing ring shrink and clamp
Interior die.
By above-mentioned technical proposal, reinforcing ring lateral surface is that insertion its surfaces externally and internally is provided with taper, and reinforcing ring
Otch, so during reinforcing ring loads conical section and is moved to small end from the big end of conical section, the outside of reinforcing ring
Surface can be pushed against with taper section surface, shrink reinforcing ring, so that the diameter generation of reinforcing ring inner ring is a certain degree of
Reduce, due to interior die be arranged on reinforcing ring in, when reinforcing ring shrinks, interior die can be clamped gradually, interior die lower end and with
Pad and contradict after internal model, internal model benevolence can so effectively fixed.So it is not required between the reinforcing ring endoporus of setting internal model Renhe
Also can preferably it be fixed between the two using interference fit.So set when needing die in replacing simultaneously, as long as
Reinforcing ring is exited into conical section, reinforcing ring can reset, increase its endoporus, easily can take out interior die, no
Destruction can be produced in itself to reinforcing ring.Simultaneously because the lateral surface of reinforcing ring is taper, the axial cross section of conical section is also cone
Shape, when gradually compressing between the two, preferable concentricity is ensure that, it is ensured that precision between the two, while tearing open repeatedly
Situations such as unloading, will not occur larger abrasion each other in assembling process, can extend the physical life of the mould.
It is preferred that, the diameter of bore that the interior die is divided into die in multistage, every section is different.
Because cold-heading is generally used for the component of rod category such as production screw, bolt, rivet, and such part generally comprises a head
Portion and the ladder shaft part with its integrally connected, when processing ladder shaft part, the interior die upper surface meeting at the place that changed in the diameter of axle
Occur larger abrasion, make its relatively interior die be more easy to elsewhere wear and tear.Interior die is so segmented, can be according to each
The actual wear situation of die, is changed to die in each section in section, while the upper and lower ends face of interior die can also be changed,
To improve the service life of same interior die.
It is preferred that, interior the die end face and its lateral surface are provided with oil groove.
By above-mentioned technical proposal, oil groove set lubricating oil that can conveniently in process in mould addition and
Discharge, to improve the product quality that cold-heading goes out, while reducing die wear and wire drawing.
It is preferred that, it is provided with the shoulder hole in the formwork on annular groove, annular groove and is provided with steam vent.
By above-mentioned technical proposal, the air in interior die can be discharged by stomata in process, it is to avoid due to
Die cavity in interior die causes the air in during cold-heading in die by Fast Compression due to the presence of air, causes cold-heading
When noise increase.
It is preferred that, it is provided with chamfering or fillet on the interior die end face.
, can be with by the material of cold-heading when the setting of fillet or chamfering can facilitate cold-heading by above-mentioned technical proposal
More swimmingly enter in the endoporus of interior die, while it is outer peripheral broken to reduce interior die end face to a certain extent
It is bad.
It is preferred that, it is provided with locating slot on the formwork outer surface.
By above-mentioned technical proposal, the setting of locating slot can facilitate the fixation and positioning of formwork, when fixing formwork more
Plus firmly.
It is preferred that, the height of the reinforcing ring is more than the height of interior die, and interior die is in the lower end of reinforcing ring.
By above-mentioned technical proposal, a shaping can be formed between interior die upper surface and reinforcing ring endoporus in cold-heading
Chamber, when processing the parts such as screw, the screw that this forming cavity is processed to the parts such as screw is first-class.
Another object of the present invention is with providing a kind of processing method for processing above-mentioned cold upsetting die of car, including formwork
Processing technology,
S1, from the trade mark be SKD61 forging round steel, using large-scale cutting machine carry out blank,
S2, machining, it is rough turn cylindrical, in CNC machining center fine turning outer circles, rough turn endoporus, smart car endoporus, rough turn internal thread,
S3, heat treatment, are carried out carburizing and quenching by industry control multipurpose furnace, are tempered using industry control large-scale vacuum tempering furnace, make work
The integral hardness of part reaches HRC46 ~ 48,
S4, cylindrical, the fine cylindrical of corase grind, roughly grind endoporus, refine endoporus, smart car internal thread；
The processing technology of reinforcing ring,
S1, the forging round steel from the SKD11 trades mark, blank is carried out using cutting machine,
It is S2, rough turn cylindrical, then carry out rough turn endoporus successively in CNC machining centers, smart car endoporus, fine turning outer circle,
S3, using industry control multipurpose furnace carry out carburizing and quenching, be then tempered using industry control large-scale vacuum tempering furnace, make workpiece whole
Body hardness reaches HRC60 ~ 61,
S4, corase grind endoporus, fine grinding endoporus, then roughly grind cylindrical, fine cylindrical,
S5, slotted using wire cutting in reinforcing ring lateral surface；
The processing technology of interior die,
S1, the mould wolfram steel from the trade mark in the range of VA80 ~ VA95, blank is carried out by wire cutting,
S2, corase grind endoporus, fine grinding endoporus, roughly grind cylindrical, fine cylindrical,
S3, using spark discharge chamfering is carried out to endoporus, electric spark is processed to oil groove,
S4, polishing, then internal die surface carry out special coating treatment U.S. long, 0.5 ~ 0.8um of coating layer thickness；
The processing technology padded after internal model,
S1, the forging round steel from the SKD61 trades mark, blank is carried out using cutting machine,
It is S2, rough turn cylindrical, then in CNC machining centers successively fine turning outer circle, rough turn endoporus, smart car endoporus；
S3, carburizing and quenching carried out by industry control multipurpose furnace, then practical industry control large-scale vacuum tempering furnace is tempered, and makes workpiece whole
Body hardness reaches HRC46 ~ 48,
S4, fine turning outer circle, smart car endoporus；
The processing technology of screw element,
S1, the forging round steel from the SKD61 trades mark, using cutting machine blanking,
It is S2, rough turn cylindrical, carry out smart car processing in CNC machining centers, fine turning outer circle, rough turn endoporus, smart car endoporus, milling flat,
External threading,
S3, carburizing and quenching carried out by industry control multipurpose furnace, then practical industry control large-scale vacuum tempering furnace is tempered, and makes workpiece whole
Body hardness reaches HRC44 ~ 46,
S4, fine turning outer circle, smart car endoporus, smart car external screw thread.
It is preferred that, after to formwork, screw element and internal model pad quench when, workpiece heat temperature to 870 DEG C ~ 890 DEG C,
Insulation 1.4 ~ 1.6 hours, after to formwork, screw element and internal model pad be tempered when workpiece temperature be maintained at 350 ~ 500 DEG C it
Between, workpiece hardness of the soaking time according to needed for after the workpiece hardness after carburizing and quenching and tempering often reduces HRC1 tempering times and increased
Plus 5 ~ 10 minutes.
It is preferred that, also including packaging technology,
S1, by interior die load reinforcing ring,
S2, will after interior die, internal model pad, screw element be sequentially loaded into from formwork rear end in shoulder hole, then utilize four post moulding press
In the conical section of pad press-in shoulder hole, reinforcing ring will be made concordant with formwork upper surface after reinforcing ring, interior die, internal model,
S3, rotation screw element, by mold-locked.
By above-mentioned technical proposal, all parts of the cold upsetting die of car can be made to keep preferable physical life, in processing
During be not susceptible to the phenomenons such as excessive deformation, rupture failure, while more convenient when being processed, assembling to mould.
Brief description of the drawings
Fig. 1 is the schematic cross-section of embodiment one；
Fig. 2 is the structural representation of reinforcing ring in embodiment one；
Fig. 3 is the structural representation of interior die in embodiment one；
Fig. 4 is the structural representation of embodiment two.
Reference：1st, formwork；11st, steam vent；12nd, locating slot；13rd, retainer ring；14th, screw hole；15th, annular groove；2、
Reinforcing ring；21st, otch；22nd, chamfering；3rd, interior die；31st, upper benevolence；32nd, middle benevolence；33rd, lower benevolence；34th, oil groove；4th, padded after internal model；5、
Screw element.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification without creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
Embodiment one, a kind of cold upsetting die of car,
As shown in Figure 1 to Figure 3, a kind of cold upsetting die of car, includes the formwork 1 of cylinder, and the lateral surface of formwork 1 is provided with one with positioning
Groove 12, locating slot 12 is formed by wire cutting cutting, and locating slot 12 includes a face axially vertical with formwork 1 and an inclined-plane,
Angle between inclined-plane and the axis of formwork 1 is 15 °.Setting for locating slot 12 can coordinate with the fiber component on cold headers, prevent
Only mould is encased in after cold headers and rotated.It is provided with formwork 1 on the shoulder hole of an axial direction, shoulder hole insertion formwork 1
Lower two end faces, shoulder hole small end is conical section, and is connected with the upper surface of formwork 1, and the axial cross section of conical section is taper；Ladder
The big end in hole is cylindrical section, and cylindrical section is provided with internal thread on lower end.
Internal model is installed, internal model includes reinforcing ring 2 and interior die 3 in conical section.The lateral surface of reinforcing ring 2 is circular cone shape,
The medial surface of reinforcing ring 2 is that the axis direction of reinforcing ring 2 is provided with otch 21, the connection reinforcing ring of otch 21 on cylinder, reinforcing ring 2
2 interior lateral surface, makes whole reinforcing ring 2 C-shaped.Otch 21 is formed by linear cutter, and excuse width is left in 0.6 ~ 1.0mm
It is right.Elastic deformation can occur for reinforcing ring 2 during reinforcing ring 2 is moved from the big end of conical section to conical ring small end, make reinforcement
Ring 2 is overall to be shunk, and the diameter of the medial surface of reinforcing ring 2 is occurred certain diminish.Reinforcing ring 2 is internally provided with interior die
3, reinforcing ring 2 is set on interior die 3, and when reinforcing ring 2 deforms, reinforcing ring 2 clamps interior die 3；When reinforcing ring 2 does not have
When deforming, interior die 3 can be slided in reinforcing ring 2 along the medial surface of reinforcing ring 2 is smooth.
Oil groove 34 is both provided with two end faces up and down and its lateral surface of interior die 3, oil groove 34 is by electrical discharge machining
Into, mould inside can be entered during cold-heading to be used in the fluid of lubrication, the internal surface of die 3 is lubricated, with
Reduce the physical life of die 3 in the friction that material occurs during cold-heading molding between interior die 3, extension.Interior die 3
End face on be additionally provided with chamfering 22 or be rounded down so that the raw material of processing workpiece is being entered in the endoporus of interior die 3
Make more smooth, the destruction that the intersection of the endoporus of die 3 and end face is received in continuous process in reduction.Interior die 3
Occur towards on surface from the beginning the destruction during Ren Dui is general, another surface of interior die 3 base during cold-heading
Originally it will not destroy, simultaneously because not being by interference fit, the ratio of dismounting between the two between interior die 3 and reinforcing ring 2
It is more convenient, when the upper surface of interior die 3 is being destroyed during cold-heading, can by exchanging in die 3 towards from the beginning
Direction makes the purpose of mould normal work again to reach.It can so economize on resources, resource utilization is reached maximum.
It is in ladder shaft-like that pad 4 after pad 4 after the internal model contradicted with its lower surface, internal model is provided with below internal model, and interior rear pad is inserted
It is located in shoulder hole, end face and the internal model lower surface at its big end are contradicted.It is provided with after internal model in pad 4 and the endoporus in interior die 3
The through hole of connection.The small end outer sheath of pad 4 is provided with screw element 5 after internal model.The upper end of screw element 5 and the lower surface of pad 4 after internal model are contradicted,
The external screw thread for the screw-internal thread fit being provided with the lateral surface of screw element 5 on the endoporus of formwork 1.During assembling, screw element 5 is threaded in
The lower end of the shoulder hole of formwork 1, and compressing pad 4 after internal model makes reinforcing ring 2 be in conical section and in compressive state.Now strengthen
Ring 2 clamps interior die 3, while reinforcing ring 2 and the rear surface of interior die 3 are pushed against after internal model on pad 4.
The stomata connected with the outside of formwork 1 is provided between conical section and cylindrical section on shoulder hole, when punch die is by raw material
When pouring interior die 3, air can be discharged by stomata in the interior endoporus of die 3, it is to avoid the air in interior die 3 adds in workpiece
By Repeated Compression during work, larger noise is produced.The height of reinforcing sleeve can be more than the height of interior die 3 simultaneously, and make
Interior die 3 is in the lower end of reinforcing ring 2.So when the bar to processing part carries out cold-heading, the upper end of bar, which can be in, to be added
In the forming cavity that the strong medial surface of ring 2 and the upper surface of interior die 3 are constituted together, the head of the parts such as screw is formed.It can so enter
One step simplifies the structure of the cold upsetting die of car, reduces the endoporus hop count in interior die 3.
Other independent interior die 3 can be additionally set after internal model on the upper surface of pad 4, two interior dies 3 it is interior
Bore dia is different, the different sections of the generation processing part such as correspondence bolt.Interior 3 points of die can reduce the processing of interior die 3 for two sections
Difficulty, while being not required to change all interior dies 3 when destroying for a certain section of interior die 3.
Embodiment two, a kind of cold-heading grinding tool,
As shown in figure 4, the difference of embodiment two and embodiment one is formwork 1 and interior die 3.The outside of formwork 1 of embodiment two
A circle retainer ring 13 is provided with the middle part of face, what retainer ring 13 and formwork 1 were integrated.Multiple screw holes are provided with retainer ring 13
14, formwork 1 is fixed on cold headers with facilitating.Also set up simultaneously between the conical section and cylindrical section in the inner step hole of formwork 1
There is an annular groove 15, steam vent 11 is located on annular groove 15.After the completion of mould installion, padded behind the lower surface of internal model and internal model
4 upper surface is in annular groove 15.During cold-heading, the air on the interior endoporus of die 3 can be passed in and out from steam vent 11.
The internal model hole of embodiment two is divided into benevolence 31, middle benevolence 32 and lower benevolence 33.It is upper benevolence 31, middle benevolence 32, interior in lower benevolence 33
Bore dia is reduced successively.Upper benevolence 31, middle benevolence 32 and lower benevolence 33 are installed in reinforcing ring 2 simultaneously, to further facilitate interior die 3
Each section of replacing.
Simultaneously in embodiment two can also by internal model after pad 4 and screw element 5 be wholely set, during reprocessing screw element 5, directly
Connect that pad after internal model 4 is integrally manufactured in the upper end of screw element 5, on the one hand reduce manufacturing procedure, on the other hand further simplify mould
Structure.Embodiment three, a kind of manufacturing procedure of cold forging die,
A kind of manufacturing procedure of cold forging die, including the processing technology of formwork, the processing technology of reinforcing ring, the processing work of interior die
The processing technology and the processing technology of screw element padded after skill, internal model.
The processing technology of formwork includes：
S1, blanking：From the forging round steel that the trade mark is SKD61, blank is carried out using large-scale cutting machine,
S2, machining：Rough turn cylindrical, then in CNC machining centers successively fine turning outer circle, rough turn endoporus, smart car endoporus is rough turn interior
Screw thread,
S3, heat treatment：Carburizing and quenching is carried out by industry control multipurpose furnace, using the method for gas carburizing, by workpiece heat to 880
DEG C, 1.5 hours then are incubated, then workpiece is taken out and quenched.The workpiece after quenching is returned using industry control large-scale vacuum again
Stove is tempered, and the temperature of workpiece first is heated into 430 DEG C, then according to the hardness after workpiece quenching and required tempering
Hardness afterwards determines tempering time, increases the soaking time of 7 minutes generally according to every reduction HRC1, reaches the integral hardness of workpiece
To HRC46 ~ 48.
S4, finishing：Cylindrical, fine cylindrical is roughly ground, endoporus is roughly ground, endoporus, smart car internal thread is refined.Required after finishing
The required precision of formwork outside dimension is between -0.05 ~ 0mm, and the size of shoulder hole is between 0 ~ 0.01mm, and axiality and circularity will
Ask within 0.01mm, depth of parallelism requirement is 0.02, mm, and linearity requirement is within 0.01mm, and endoporus circle beating degree exists
Within 0.02mm.
The processing technology of reinforcing ring：
S1, the forging round steel from the SKD11 trades mark, blank is carried out using cutting machine.
It is S2, rough turn cylindrical, then rough turn endoporus, smart car endoporus, fine turning outer circle, in essence are carried out successively in CNC machining centers
During in-car hole, while internally bore ends carry out chamfering.
S3, using industry control multipurpose furnace carburizing and quenching is carried out, using the method for gas carburizing, by workpiece heat to 880 DEG C, so
1.5 hours are incubated afterwards, then workpiece is taken out and quenched.The workpiece after quenching is entered using industry control large-scale vacuum tempering furnace again
Row tempering, is first heated to 430 DEG C, then according to hard after the hardness after workpiece quenching and required tempering by the temperature of workpiece
Degree determines tempering time, generally according to every reduction HRC1 increase soaking times of 7 minutes, make workpiece integral hardness reach HRC60 ~
61,
S4, corase grind endoporus, fine grinding endoporus, then roughly grind cylindrical, fine cylindrical.After finishing, the external dimensions precision of reinforcing ring
Between -0.01 ~ 0mm, inner hole precision is between 0 ~ 0.01mm, and the depth of parallelism is within 0.01mm, and axiality is in 0.01mm, endoporus
Linearity is in 0.01mm, and endoporus justifies beating degree within 0.01mm, and inner bore chamfering angle factory is ± 0.5 °.
S5, slotted using wire cutting in reinforcing ring lateral surface, kerf width is 0.8 ± 0.05mm.
The processing technology of interior die：
S1, the mould wolfram steel from the trade mark in the range of VA80 ~ VA95, blank is carried out by wire cutting.On generally
In Renhe benevolence use the VA95 trades mark mould wolfram steel, lower benevolence using the VA80 trades mark mould wolfram steel.Simultaneously to the hard of material
Degree is detected, it is desirable to which within the scope of the hardness requirement of benevolence is HRA81.5 ~ 82.5 in upper Renhe, the hardness requirement of lower benevolence exists
HRA84~86。
S2, corase grind endoporus, fine grinding endoporus, roughly grind cylindrical, fine cylindrical.
S3, using spark discharge to endoporus carry out chamfering, electric spark oil groove is processed oil groove a diameter of 0.3 ±
0.05mm。
S4, polishing, then internal die surface carry out special coating treatment U.S. long, 0.5 ~ 0.8um of coating layer thickness.Machine
The outside dimension precision of interior die is between -0.01 ~ 0mm afterwards, and inside dimension precision is between 0 ~ 00.005mm, and the depth of parallelism exists
0.005mm, axiality 0.005mm, circularity 0.005mm, endoporus linearity 0.005mm, endoporus circle beating degree 0.008mm.
The processing technology of screw element：
S1, the forging round steel from the SKD61 trades mark, use cutting machine blanking.
It is S2, rough turn cylindrical, smart car processing is carried out in CNC machining centers, fine turning outer circle, rough turn endoporus, smart car endoporus, milling is put down
Face, external threading,
S3, carburizing and quenching carried out by industry control multipurpose furnace, then practical industry control large-scale vacuum tempering furnace is tempered, and makes workpiece whole
Body hardness reaches HRC44 ~ 46.The step can be using the carburizing and quenching and the technological requirement of tempering with shell.
S4, fine turning outer circle, smart car endoporus, smart car external screw thread.
The outside dimension precision for finishing rear thread part is -0.02 ~ 0mm, and inside dimension precision is 0 ~ 0.05mm, and the depth of parallelism is
0.02mm, linearity 0.01mm, endoporus beating degree 0.03mm.
After all parts of the cold upsetting die of car are machined, first die in Shang Ren, middle benevolence and lower benevolence etc. is filled successively
Enter into reinforcing ring, then load reinforcing ring in conical section from the big end of conical section.Then pad after internal model is loaded into formwork again
In shoulder hole, then screw element is set in the small end padded after internal model again.Then the cold upsetting die of car tentatively assembled is put into four
On post moulding press, four post moulding press is padded lower surface after being respectively acting on formwork upper surface and internal model, make on reinforcing ring and formwork
End face is concordant.Then screw element is tightened, by cold upsetting die of car integral locking.
The above is only the exemplary embodiment of the present invention, not for limiting the scope of the invention, this hair
Bright protection domain is determined by appended claim.
Claims (10)
1. a kind of cold upsetting die of car, including housing and internal model, it is characterized in that：The housing includes being provided with insertion in formwork, formwork
The shoulder hole of two end faces of formwork, the small end end of shoulder hole is provided with conical section, and conical section is in the upper surface of formwork, shoulder hole
Big end be in the lower surface of formwork, internal model includes being provided with the reinforcing ring of the taper coordinated with conical section inwall, reinforcing ring
Interior die, reinforcing ring side is provided with the shoulder hole below the axial cut-outs of insertion reinforcing ring surfaces externally and internally, internal model and is provided with
Padded after the internal model contradicted with internal model lower end, pad lower section is provided with the screw element being threadedly coupled with housing after internal model, screw element is pushed against
Pad shrinks reinforcing ring and clamps interior die after internal model.
2. cold upsetting die of car according to claim 1, it is characterized in that：The interior die is divided into the interior of die in multistage, every section
Bore dia is different.
3. cold upsetting die of car according to claim 1, it is characterized in that：The interior die end face and its lateral surface are provided with oil
Groove.
4. cold upsetting die of car according to claim 3, it is characterized in that：Annular groove is provided with shoulder hole in the formwork,
Steam vent is provided with annular groove.
5. cold upsetting die of car according to claim 1, it is characterized in that：Chamfering or circle are provided with the interior die end face
Angle.
6. cold upsetting die of car according to claim 1, it is characterized in that：Locating slot is provided with the formwork outer surface.
7. cold upsetting die of car according to claim 1, it is characterized in that：The height of the reinforcing ring is more than the height of interior die,
Interior die is in the lower end of reinforcing ring.
8. one kind is used for the processing technology for processing cold upsetting die of car described in claim 1 ~ 8, its feature with：Adding including formwork
Work technique,
S1, from the trade mark be SKD61 forging round steel, using large-scale cutting machine carry out blank,
S2, machining, it is rough turn cylindrical, in CNC machining center fine turning outer circles, rough turn endoporus, smart car endoporus, rough turn internal thread,
S3, heat treatment, are carried out carburizing and quenching by industry control multipurpose furnace, are tempered using industry control large-scale vacuum tempering furnace, make work
The integral hardness of part reaches HRC46 ~ 48,
S4, cylindrical, the fine cylindrical of corase grind, roughly grind endoporus, refine endoporus, smart car internal thread；
The processing technology of reinforcing ring,
S1, the forging round steel from the SKD11 trades mark, blank is carried out using cutting machine,
It is S2, rough turn cylindrical, then carry out rough turn endoporus successively in CNC machining centers, smart car endoporus, fine turning outer circle,
S3, using industry control multipurpose furnace carry out carburizing and quenching, be then tempered using industry control large-scale vacuum tempering furnace, make workpiece whole
Body hardness reaches HRC60 ~ 61,
S4, corase grind endoporus, fine grinding endoporus, then roughly grind cylindrical, fine cylindrical,
S5, slotted using wire cutting in reinforcing ring lateral surface；
The processing technology of interior die,
S1, the mould wolfram steel from the trade mark in the range of VA80 ~ VA95, blank is carried out by wire cutting,
S2, corase grind endoporus, fine grinding endoporus, roughly grind cylindrical, fine cylindrical,
S3, using spark discharge chamfering is carried out to endoporus, electric spark is processed to oil groove,
S4, polishing, then internal die surface carry out special coating treatment U.S. long, 0.5 ~ 0.8um of coating layer thickness；
The processing technology padded after internal model,
S1, the forging round steel from the SKD61 trades mark, blank is carried out using cutting machine,
It is S2, rough turn cylindrical, then in CNC machining centers successively fine turning outer circle, rough turn endoporus, smart car endoporus；
S3, carburizing and quenching carried out by industry control multipurpose furnace, then practical industry control large-scale vacuum tempering furnace is tempered, and makes workpiece whole
Body hardness reaches HRC46 ~ 48,
S4, fine turning outer circle, smart car endoporus；
The processing technology of screw element,
S1, the forging round steel from the SKD61 trades mark, using cutting machine blanking,
It is S2, rough turn cylindrical, carry out smart car processing in CNC machining centers, fine turning outer circle, rough turn endoporus, smart car endoporus, milling flat,
External threading,
S3, carburizing and quenching carried out by industry control multipurpose furnace, then practical industry control large-scale vacuum tempering furnace is tempered, and makes workpiece whole
Body hardness reaches HRC44 ~ 46,
S4, fine turning outer circle, smart car endoporus, smart car external screw thread.
9. the processing technology of cold upsetting die of car according to claim 8, it is characterized in that：After to formwork, screw element and internal model
When pad is quenched, workpiece heat temperature is incubated 1.4 ~ 1.6 hours, to formwork, screw element and internal model to 870 DEG C ~ 890 DEG C
Afterwards pad when being tempered workpiece temperature be maintained between 350 ~ 500 DEG C, soaking time according to the workpiece hardness after carburizing and quenching and
Workpiece hardness needed for after tempering, which often reduces HRC1 tempering times, to be increased by 5 ~ 10 minutes.
10. the processing technology of cold upsetting die of car according to claim 8, it is characterized in that：Also include packaging technology,
S1, by interior die load reinforcing ring,
S2, will after interior die, internal model pad, screw element be sequentially loaded into from formwork rear end in shoulder hole, then utilize four post moulding press
In the conical section of pad press-in shoulder hole, reinforcing ring will be made concordant with formwork upper surface after reinforcing ring, interior die, internal model,
S3, rotation screw element, by mold-locked.
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| CN201710354935.3A CN106955960A (en) | 2017-05-19 | 2017-05-19 | Cold upsetting die of car and its processing technology |
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| CN201710354935.3A CN106955960A (en) | 2017-05-19 | 2017-05-19 | Cold upsetting die of car and its processing technology |
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| CN108160826A (en) * | 2018-02-09 | 2018-06-15 | 浙江俊荣五金工业有限公司 | For the molding die of trigonodont self-tapping screw |
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| CN107398746A (en) * | 2017-09-22 | 2017-11-28 | 重庆江增船舶重工有限公司 | A kind of cutting tool and processing method of nozzle outer shroud |
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| CN108941415B (en) * | 2018-09-12 | 2021-03-30 | 江苏东吉精密科技有限公司 | Combined type punching die for bolt head and manufacturing method thereof |
| CN108941415A (en) * | 2018-09-12 | 2018-12-07 | 盐城瑞能精密机械厂 | A kind of the combined type punch die and its manufacturing method of bolt head |
| CN109465611A (en) * | 2018-12-11 | 2019-03-15 | 江苏雨顺自动化科技有限公司 | It is a kind of for automate processing high-strength die preparation process |
| CN109551191A (en) * | 2018-12-11 | 2019-04-02 | 江苏雨顺自动化科技有限公司 | A kind of sealing ring mould processing technology |
| CN109940356A (en) * | 2019-03-11 | 2019-06-28 | 深圳航空标准件有限公司 | The manufacturing procedure of double trimming formers and its double trimming formers |
| CN111331324A (en) * | 2020-02-17 | 2020-06-26 | 四川科思精密模具有限公司 | Method for preventing corrosion pits from appearing in surface machining of die parts |
| CN111283385A (en) * | 2020-02-26 | 2020-06-16 | 盘起工业(大连)有限公司 | Ultra-precise die machining method and ultra-precise die |
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| CN112756536A (en) * | 2020-12-29 | 2021-05-07 | 铭昊汽车金属零部件(广州)有限公司 | Forging die for automobile step parts |
| CN113649512A (en) * | 2021-08-09 | 2021-11-16 | 宁波固强机械有限公司 | Mold for manufacturing automobile inner bushing and manufacturing method of automobile inner bushing |
| CN113649512B (en) * | 2021-08-09 | 2024-04-19 | 宁波固强机械有限公司 | Mold for manufacturing automobile lining sleeve and automobile lining sleeve manufacturing method |
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