CN108247286A - Automobile clutch overall waveform machining process - Google Patents
Automobile clutch overall waveform machining process Download PDFInfo
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- CN108247286A CN108247286A CN201711325177.9A CN201711325177A CN108247286A CN 108247286 A CN108247286 A CN 108247286A CN 201711325177 A CN201711325177 A CN 201711325177A CN 108247286 A CN108247286 A CN 108247286A
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- 238000003754 machining Methods 0.000 title claims abstract description 7
- 238000005496 tempering Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000004140 cleaning Methods 0.000 claims abstract description 26
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 238000010791 quenching Methods 0.000 claims abstract description 11
- 238000009499 grossing Methods 0.000 claims abstract description 10
- 238000004080 punching Methods 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 230000002000 scavenging effect Effects 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 12
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A kind of automobile clutch overall waveform machining process, belongs to clutch processing technique field.The step of the present invention is to prepare spheroidizing state 65Mn steel bands, and process rushes centre bore blanking for punching jet-bedding；Overall waveform piece quenches：Feeding cleaning, quenching, rear cleaning, tempering smoothing, tempering molding, antirust treatment.It is an advantage of the invention that：8 waveforms on overall waveform piece circumference, type high energy meet the requirement of consistency.The overall waveform piece processed with former technique is compared by being compressed axially long duration test, and tired attenuation decreases.
Description
Technical field
The invention belongs to clutch processing technique fields.
Background technology
One of effect of clutch is to ensure automobile smooth-going starting, and corrugated sheet plays axial subtract in the cohesive process of clutch
Bestir oneself use, and corrugated sheet is divided into two kinds in structure, monoblock type and split type.Corrugated sheet is primarily subjected to alternating load, and impact carries
Lotus, shear stress, therefore fatigue attenuation is easily generated, vehicle starting is caused to shake.Material used in corrugated sheet is 65Mn,
It is required that it has higher elastic limit, yield strength and fatigue strength.
Overall waveform machining process rushes centre bore-blanking forming-tempering heat treatment-antirust for punching-jet-bedding-at present,
Raw material be heat- treated steel band, width 226mm, thickness 0.8mm, hardness 440-485 HV30.It completes to rush using conventional punch mode
Hole, jet-bedding rush centre bore process acquisition process part processing.The workpiece for completing to rush centre bore is put into mold, makes by blanking forming process
Workpiece positioning is carried out with the positioning pin on the location hole and lower mould on workpiece, die punch and Die Design are drop shape
Ensure that corrugated sheet can be molded to drop during punching press, starting device carries out carry out blanking forming, and blanking forming process need to meet outer
Circular diameter, flatness and the high requirement of type.Tempering heat treatment：350 ± 10 DEG C of temperature, the time need to meet 120min.Antirust：Immersion oil
Base antirust oil carries out antirust treatment, it is desirable that workpiece must be completely submerged in antirust oil, stand 10 seconds, then natural air drying.With
It is upper description technique the problem is that, quenching spring steel band is there are certain hardness, in the forming process of blanking forming process
Can generate certain springback capacity, springback capacity and using steel band thickness width there are correlation, and the entire circle of overall waveform piece
In circumferential direction, steel band machine direction be it is inconsistent, in order to can guarantee the consistency between each waveform of overall waveform piece, usually
It needs to adjust the type face drop size for being molded process mould, heavy workload repeatedly.Overall waveform piece after punch forming, exists
Moulding stress, 350 DEG C of the tempering mentioned in above-mentioned technical process, belongs to average tempering, in order not to change the synthesis of raw material
Performance, it is impossible to improve temperature again and carry out destressing tempering, as a result can lead to corrugated sheet axial deflection in use
A degree of attenuation is had, automobile can be caused to be trembled when starting after the attenuation of corrugated sheet axial deflection is excessive
It is dynamic.
Invention content
The purpose of the present invention is meet the high coherence request of type and as possible by overall waveform machining process mode
Reduce the automobile clutch overall waveform machining process of corrugated sheet axial deflection fatigue attenuation.
The present invention step be：
（1）Prepare spheroidizing state 65Mn steel bands, width 226mm, thickness 0.80mm, hardness 100-130HV30；
（2）The tablet of punch process level state carries out tablet processing using conventional punch mode, and process is in punching-jet-bedding-punching
Heart hole-blanking；
（3）Overall waveform piece quenches：
A, feeding cleans：The workpiece that punching press is completed by 500 per stove interval is uniformly through on load bearing beam, ensures the punching of workpiece
The load bearing beam for putting on workpiece is placed on heated jig, is sent the heated jig for filling workpiece with delivery vehicle towards identical by direction
To washing station, cleaning machine front door is opened, the heated jig for filling workpiece is pushed into cleaning machine by the material-pulling device in delivery vehicle
Interior, cleaning solution is LW-1 cleaner for metal, sets scavenging period 20min, and starting device button starts to clean；
B, it quenches：It cleans after terminating and the heated jig equipped with part is pulled out into cleaning machine with delivery vehicle, be transported to sealed-box type
Furnaceman position, sets 830 ± 5 DEG C of heating temperature, carbon potential 0.65 ± 0.05%, 12 ± 1m of RX gases3/ h, heating time 30min, quenches
120 ± 5 DEG C of kerosene temperature, cool time 15min, starting device is quenched, and hardness meets 650-780HV after quenching30；
C, rear cleaning：After quenching, the heated jig for filling workpiece is sent to washing station with delivery vehicle, before opening cleaning machine
Door by the material-pulling device in delivery vehicle by the heated jig push-in cleaning machine for filling workpiece, sets scavenging period 20min, opens
Dynamic device button starts to clean, and cleaning goes to down workpiece to process after terminating；
（4）Tempering smoothing：It takes quenching and cleans the overall waveform piece of completion on tempering mould mandrel, overall waveform piece is by becoming
The layering of shape direction is alternately put, and 100 are filled per column, and the clump weight of upper end counterweight 40kg sets 430 ± 5 DEG C of temperature, treats stove
After interior temperature reaches set temperature, the tempering mould for installing workpiece is put into tempering furnace, 5 columns are put per stove, sets tempering time
120min starts tempering furnace, and workpiece natural cooling after tempering, hardness meets 440-540 HV after tempering smoothing30, plane
Spend satisfaction≤0.2mm；
（5）Tempering molding：Equipment manual mode sets 540 DEG C, heating time 4min of heating temperature, equipment pressure 80kgf/cm2,
Starting device heats up, and after mold temperature to be formed reaches requirement, equipment is adjusted to auto state, fetch fire smoothing after
Overall waveform piece, every group 5, overall waveform piece placing direction is consistent, by 5 simultaneously be put into molding die, starting device into
Row tempering molding, workpiece natural cooling after molding, workpiece must be disposed vertically during cooling, and workpiece two sides cannot contact other works
Position utensil avoids being deformed when cooling, and the rear profile height of tempering molding meets 0.7 ± 0.1mm, and hardness meets 390-510
HV30；
（6）Antirust treatment：The corrugated sheet after igneous type is fetched, corrugated sheet is immersed in antirust oil groove using special fixture,
5-10 parts are taken every time, stand 10 seconds, are taken out workpiece and are placed on natural air drying in container.
It is an advantage of the invention that：8 waveforms on overall waveform piece circumference, type high energy meet the requirement of consistency.With original
The overall waveform piece that technique processes is compared by being compressed axially long duration test, and tired attenuation decreases.
Description of the drawings
The heat treatment process figure of Fig. 1 present invention.
Specific embodiment
The present invention step be：
（1）Prepare spheroidizing state 65Mn steel bands, width 226mm, thickness 0.80mm, hardness 100-130HV30。
（2）The tablet of punch process level state carries out tablet processing using conventional punch mode, process for punching-jet-bedding-
Rush centre bore-blanking；Overall waveform piece is carried out not needed to when last sequence blanking with the different place of former technique
Molding.Just specifically blanking is described in detail below.
（3）Overall waveform piece quenches：
A, feeding cleans：The workpiece that punching press is completed by 500 per stove interval is uniformly through on load bearing beam, ensures the punching of workpiece
The load bearing beam for putting on workpiece is placed on heated jig, is sent the heated jig for filling workpiece with delivery vehicle towards identical by direction
To washing station, cleaning machine front door is opened, the heated jig for filling workpiece is pushed into cleaning machine by the material-pulling device in delivery vehicle
Interior, cleaning solution is LW-1 cleaner for metal, sets scavenging period 20min, and starting device button starts to clean.
B, it quenches：It cleans after terminating and the heated jig equipped with part is pulled out into cleaning machine with delivery vehicle, be transported to sealing
Batch-type furnace station sets 830 ± 5 DEG C of heating temperature, carbon potential 0.65 ± 0.05%, 12 ± 1m of RX gases3/ h, heating time
30min quenches 120 ± 5 DEG C of oil temperature, and cool time 15min, starting device is quenched, and hardness meets 650- after quenching
780HV30。
C, rear cleaning：After quenching, the heated jig for filling workpiece is sent to washing station with delivery vehicle, opens cleaning
Machine front door by the material-pulling device in delivery vehicle by the heated jig push-in cleaning machine for filling workpiece, sets scavenging period
20min, starting device button start to clean, and cleaning goes to down workpiece to process after terminating.
（4）Tempering smoothing：It takes quenching and cleans the overall waveform piece of completion on tempering mould mandrel, overall waveform piece
It is alternately put by deformation direction layering, 100 is filled per column, the clump weight of upper end counterweight 40kg sets 430 ± 5 DEG C of temperature,
After in-furnace temperature reaches set temperature, the tempering mould for installing workpiece is put into tempering furnace, 5 columns, setting tempering are put per stove
Time 120min starts tempering furnace, and workpiece natural cooling after tempering, hardness meets 440-540 HV after tempering smoothing30,
Flatness satisfaction≤0.2mm.
（5）Tempering molding：Equipment manual mode sets 540 DEG C, heating time 4min of heating temperature, equipment pressure 80kgf/
cm2, starting device heats up, and after mold temperature to be formed reaches requirement, equipment is adjusted to auto state, fetches fiery smoothing
Overall waveform piece afterwards, every group 5, overall waveform piece placing direction is consistent, 5 is put into molding die simultaneously, startup is set
Standby to carry out tempering molding, workpiece natural cooling after molding, workpiece must be disposed vertically during cooling, and workpiece two sides cannot contact it
His working position apparatus avoids being deformed when cooling, is tempered rear profile height 0.7 ± 0.1mm of satisfaction of molding, and hardness meets 390-
510 HV30。
（6）Antirust treatment：The corrugated sheet after igneous type is fetched, corrugated sheet is immersed in antirust oil groove using special fixture
It is interior, 5-10 parts are taken every time, stand 10 seconds, are taken out workpiece and are placed on natural air drying in container.
The advantageous effect that technical solution of the present invention is brought
By taking 215 specification clutch product overall waveform pieces of φ as an example, corrugated sheet axial deflection requirement 0.6-0.9mm, 500,000 times
Long duration test requirement axial deflection attenuation rate is compressed axially no more than 20%.Take former technique processing overall waveform piece and the present invention
Technique processes each 20 groups of overall waveform piece, every group 5, after assembling clutch drived disk assy, detects and records axial deformation numerical quantity
（It is shown in Table 1）, then carry out being compressed axially fatigue endurance test.
1）By clutch drived disk assy loaded on testing machine, testing machine is compressed axially for the production of Zhong Yan testing equipments research institute
Durability-testing machines.
2）Set test frequency 3HZ, test number (TN) 5 × 105It is secondary, firing test equipment.
3）It detects after the test and records axial deformation numerical quantity.
It is obtained by more than Experimental Comparison, former process processing corrugated sheet axial deflection distribution 0.62-
0.8mm, attenuation rate 10.0%-14.9%, present invention process corrugated sheet axial deflection distribution 0.65-0.79mm, attenuation rate
5.4%-9.6%, attenuation rate smaller more stable for axial deflection new process.
1 data comparison of table：
Claims (1)
1. a kind of automobile clutch overall waveform machining process, step are：
（1）Prepare spheroidizing state 65Mn steel bands, width 226mm, thickness 0.80mm, hardness 100-130HV30；
（2）The tablet of punch process level state carries out tablet processing using conventional punch mode, and process is in punching-jet-bedding-punching
Heart hole-blanking；
It is characterized in that：
（3）Overall waveform piece quenches：
A, feeding cleans：The workpiece that punching press is completed by 500 per stove interval is uniformly through on load bearing beam, ensures the punching of workpiece
The load bearing beam for putting on workpiece is placed on heated jig, is sent the heated jig for filling workpiece with delivery vehicle towards identical by direction
To washing station, cleaning machine front door is opened, the heated jig for filling workpiece is pushed into cleaning machine by the material-pulling device in delivery vehicle
Interior, cleaning solution is LW-1 cleaner for metal, sets scavenging period 20min, and starting device button starts to clean；
B, it quenches：It cleans after terminating and the heated jig equipped with part is pulled out into cleaning machine with delivery vehicle, be transported to sealed-box type
Furnaceman position, sets 830 ± 5 DEG C of heating temperature, carbon potential 0.65 ± 0.05%, 12 ± 1m of RX gases3/ h, heating time 30min, quenches
120 ± 5 DEG C of kerosene temperature, cool time 15min, starting device is quenched, and hardness meets 650-780HV after quenching30；
C, rear cleaning：After quenching, the heated jig for filling workpiece is sent to washing station with delivery vehicle, before opening cleaning machine
Door by the material-pulling device in delivery vehicle by the heated jig push-in cleaning machine for filling workpiece, sets scavenging period 20min, opens
Dynamic device button starts to clean, and cleaning goes to down workpiece to process after terminating；
（4）Tempering smoothing：It takes quenching and cleans the overall waveform piece of completion on tempering mould mandrel, overall waveform piece is by becoming
The layering of shape direction is alternately put, and 100 are filled per column, and the clump weight of upper end counterweight 40kg sets 430 ± 5 DEG C of temperature, treats stove
After interior temperature reaches set temperature, the tempering mould for installing workpiece is put into tempering furnace, 5 columns are put per stove, sets tempering time
120min starts tempering furnace, and workpiece natural cooling after tempering, hardness meets 440-540 HV after tempering smoothing30, plane
Spend satisfaction≤0.2mm；
（5）Tempering molding：Equipment manual mode sets 540 DEG C, heating time 4min of heating temperature, equipment pressure 80kgf/cm2,
Starting device heats up, and after mold temperature to be formed reaches requirement, equipment is adjusted to auto state, fetch fire smoothing after
Overall waveform piece, every group 5, overall waveform piece placing direction is consistent, by 5 simultaneously be put into molding die, starting device into
Row tempering molding, workpiece natural cooling after molding, workpiece must be disposed vertically during cooling, and workpiece two sides cannot contact other works
Position utensil avoids being deformed when cooling, and the rear profile height of tempering molding meets 0.7 ± 0.1mm, and hardness meets 390-510
HV30；
（6）Antirust treatment：The corrugated sheet after igneous type is fetched, corrugated sheet is immersed in antirust oil groove using special fixture,
5-10 parts are taken every time, stand 10 seconds, are taken out workpiece and are placed on natural air drying in container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711325177.9A CN108247286A (en) | 2017-12-13 | 2017-12-13 | Automobile clutch overall waveform machining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711325177.9A CN108247286A (en) | 2017-12-13 | 2017-12-13 | Automobile clutch overall waveform machining process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108247286A true CN108247286A (en) | 2018-07-06 |
Family
ID=62722616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711325177.9A Pending CN108247286A (en) | 2017-12-13 | 2017-12-13 | Automobile clutch overall waveform machining process |
Country Status (1)
| Country | Link |
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| CN (1) | CN108247286A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108866302A (en) * | 2018-07-27 | 2018-11-23 | 苏州市润凯汽车配件制造有限公司 | A kind of heat setting process of butterfly spring |
| CN110026752A (en) * | 2019-05-21 | 2019-07-19 | 浙江隆中机械股份有限公司 | A kind of production technology of bicycle brake hull |
| CN110153646A (en) * | 2019-04-30 | 2019-08-23 | 海盐猛凌汽车配件有限公司 | A kind of engagement hub of a spool bracing strut processing technology |
| CN110218848A (en) * | 2019-07-05 | 2019-09-10 | 桂林福达股份有限公司 | A kind of corrugated sheet forming quenching mould and forming process for quenching |
| CN110227857A (en) * | 2019-06-11 | 2019-09-13 | 来安县鸿鼎机械制造有限公司 | A kind of saw blade Manufacture Technology of Semi-finished Products |
| CN112941275A (en) * | 2021-02-03 | 2021-06-11 | 鑫光热处理工业(昆山)有限公司 | Anti-deformation salt bath quenching process for clutch reinforcing disc |
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| US20060226584A1 (en) * | 2005-04-06 | 2006-10-12 | Ntn Corporation | Steel-member manufacturing facility, thin bearing-member and thrust bearing |
| CN201368145Y (en) * | 2009-02-18 | 2009-12-23 | 中国重汽集团济南动力有限公司 | Clutch driven disk for heavy vehicle |
| CN102383135A (en) * | 2011-10-24 | 2012-03-21 | 靖江巨成汽车配件有限公司 | Thermal-treatment manufacture process for clutch plate |
| CN103014254A (en) * | 2012-12-25 | 2013-04-03 | 长春一东离合器股份有限公司 | Heat treatment processing process for drive plate |
| CN203679032U (en) * | 2013-12-31 | 2014-07-02 | 南京法雷奥离合器有限公司 | Tempering forming die of corrugated sheet of clutch |
| CN204082976U (en) * | 2014-08-14 | 2015-01-07 | 无锡联信离合器有限公司 | Vehicle clutch driven disc assembly corrugated sheet |
| CN106048195A (en) * | 2016-08-23 | 2016-10-26 | 常州新区河海热处理工程有限公司 | Heat treatment technology for reducing deformation of GCr15 thin-wall conical ring |
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2017
- 2017-12-13 CN CN201711325177.9A patent/CN108247286A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060226584A1 (en) * | 2005-04-06 | 2006-10-12 | Ntn Corporation | Steel-member manufacturing facility, thin bearing-member and thrust bearing |
| CN201368145Y (en) * | 2009-02-18 | 2009-12-23 | 中国重汽集团济南动力有限公司 | Clutch driven disk for heavy vehicle |
| CN102383135A (en) * | 2011-10-24 | 2012-03-21 | 靖江巨成汽车配件有限公司 | Thermal-treatment manufacture process for clutch plate |
| CN103014254A (en) * | 2012-12-25 | 2013-04-03 | 长春一东离合器股份有限公司 | Heat treatment processing process for drive plate |
| CN203679032U (en) * | 2013-12-31 | 2014-07-02 | 南京法雷奥离合器有限公司 | Tempering forming die of corrugated sheet of clutch |
| CN204082976U (en) * | 2014-08-14 | 2015-01-07 | 无锡联信离合器有限公司 | Vehicle clutch driven disc assembly corrugated sheet |
| CN106048195A (en) * | 2016-08-23 | 2016-10-26 | 常州新区河海热处理工程有限公司 | Heat treatment technology for reducing deformation of GCr15 thin-wall conical ring |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108866302A (en) * | 2018-07-27 | 2018-11-23 | 苏州市润凯汽车配件制造有限公司 | A kind of heat setting process of butterfly spring |
| CN110153646A (en) * | 2019-04-30 | 2019-08-23 | 海盐猛凌汽车配件有限公司 | A kind of engagement hub of a spool bracing strut processing technology |
| CN110026752A (en) * | 2019-05-21 | 2019-07-19 | 浙江隆中机械股份有限公司 | A kind of production technology of bicycle brake hull |
| CN110227857A (en) * | 2019-06-11 | 2019-09-13 | 来安县鸿鼎机械制造有限公司 | A kind of saw blade Manufacture Technology of Semi-finished Products |
| CN110218848A (en) * | 2019-07-05 | 2019-09-10 | 桂林福达股份有限公司 | A kind of corrugated sheet forming quenching mould and forming process for quenching |
| CN112941275A (en) * | 2021-02-03 | 2021-06-11 | 鑫光热处理工业(昆山)有限公司 | Anti-deformation salt bath quenching process for clutch reinforcing disc |
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