CN103639675A - Machining method and forming die of overrunning clutch inner raceway surface - Google Patents
Machining method and forming die of overrunning clutch inner raceway surface Download PDFInfo
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- CN103639675A CN103639675A CN201310645960.9A CN201310645960A CN103639675A CN 103639675 A CN103639675 A CN 103639675A CN 201310645960 A CN201310645960 A CN 201310645960A CN 103639675 A CN103639675 A CN 103639675A
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- die
- freewheel clutch
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- 238000000034 method Methods 0.000 title abstract description 23
- 238000003754 machining Methods 0.000 title abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 23
- 238000003672 processing method Methods 0.000 claims description 19
- 238000007493 shaping process Methods 0.000 claims description 19
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000001291 vacuum drying Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 4
- 238000007514 turning Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000000137 annealing Methods 0.000 abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- 238000005422 blasting Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 239000011574 phosphorus Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000007127 saponification reaction Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 5
- 238000010273 cold forging Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/20—Making uncoated products by backward extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
Abstract
The invention discloses a machining method and a forming die of an overrunning clutch inner raceway surface. The machining method includes the steps of (01) carrying out feeding and blank forming, (02) carrying out annealing on preformed blanks, (03) carrying out shot blasting and phosphorus saponification processing on the blanks, (04) carrying out upsetting on the blanks, (05) drilling and boring technique holes in the blanks, and (06) placing the blanks on a female die body of the forming die, and reversely squeezing the blanks through a male die body so as to form the overrunning clutch inner raceway surface in a one-time plastic forming mode. By means of the method, a short process route, high production efficiency and high strength can be achieved, precision of obtained products is high, precision consistency is good, and the service life of an overrunning clutch is prolonged.
Description
Technical field
The present invention relates to metal machining and the metal stamping field of essentially no cutting, more specifically, relate to the accurate cold forging forming technology of curve surface of raceway in freewheel clutch.
Background technology
Freewheel clutch is one of mechanically operated basic part, for the vitals of transmission of power between prime mover and working machine or between machine intimate driving shaft and driven shaft and separation function.Freewheel clutch is the conversion that utilizes velocity variations or the direction of rotation of driving and driven parts, has a kind of clutch of clutch function voluntarily, of many uses.
At present, in freewheel clutch, the manufacture of curve surface of raceway mainly adopts cutting working method.There is following defect in this manufacture method: (one) process route is longer, generally will forge the multiple tracks machining processes such as base, thick finish turning processing, shaping; (2) production efficiency is lower; (3) curve surface of raceway precision uniformity is poor; (4) during due to shaping, must leave grinding undercut, product structure be increased, strength decreased.
Summary of the invention
In order to overcome existing technical problem, the present invention proposes curve surface of raceway processing method in a kind of freewheel clutch, adopts curve surface of raceway in cold forging backward extrusion technology processing freewheel clutch.
According to an aspect of the present invention, provide the processing method of curve surface of raceway in a kind of freewheel clutch, comprise the following steps:
Step 01: blanking base;
Step 02: the blank of making is annealed;
Step 03: blank is carried out to ball blast and phospholeumization processing;
Step 04: blank is carried out to jumping-up;
Step 05: blank is bored to boring fabrication hole; With
Step 06: blank is placed in the die of shaping dies and by punch reverse extrusion, to form the interior curve surface of raceway of freewheel clutch by a Plastic Forming.
Further, described step 02 comprises the following steps: blank is heated in vacuum drying oven to 710～740 ℃; Be incubated 200～300 minutes with to blank spheroidizing; With the temperature in vacuum drying oven is down to after 530～580 ℃, blank come out of the stove and air cooling to room temperature.
In step 01, blanking diameter be freewheel clutch finished product maximum gauge 75%～85%, cutting stock weight be freewheel clutch finished product weight 105%～110%.
Step 01 also comprises that turning turned blank is to remove groove and the crackle of blank surface.
In step 04, jumping-up rate is less than 55%.
According to another aspect of the present invention, provide a kind of shaping dies for curve surface of raceway processing method in described freewheel clutch, described shaping dies comprises punch assemblies and die assembly.Punch assemblies comprises: punch, and described punch is provided with through hole; Punch case, described punch case is arranged on upper bed-plate; Fairlead, described fairlead is arranged on punch case and is enclosed within on punch; And punch insert, described punch insert interference fits is in the through hole of punch and coaxial with punch.Die assembly comprises: pressure block, and described pressure block is arranged on lower bottom base and is provided with through hole; Die, described die is arranged on pressure block; Die plate insert, described die plate insert interference fits is in the die cavity of die and coaxial with die, and blank is being placed between processing period on die plate insert; Material returned slide block, described material returned slide block is arranged in the through hole of pressure block and is positioned on lower bottom base, and material returned slide block is provided with through hole; And stripping attachment, described stripping attachment passes the through hole of material returned slide block and is arranged in pressure block for the material returned.
The land effective width of punch is between 2～3.5mm.
Punch land and basic mode transition cone angle 4～6 degree.
Die adopts three ply stress circle combined interferences to join pressure and forms, 0.3～0.4% of the appearance and size that the magnitude of interference is freewheel clutch.
Preferably, punch is made by high speed die steel material.
According to curve surface of raceway processing method in freewheel clutch of the present invention, there is following beneficial effect: (1) is because cold forging carries out pressure processing at normal temperatures, metal surface can not produce oxidation, therefore, can produce the metal parts that approaches net shape, material and the energy have been saved, reduce manufacturing procedure and equipment, increased substantially production efficiency; (2) because processing products obtained therefrom is once to complete the Plastic Forming of curve surface of raceway by reverse extrusion, so metal streamline is by its shape continuous distributed, dense structure, steady quality, intensity and the life-span of having improved product; (3) in freewheel clutch during curve surface of raceway product design without design grinding undercut, and can realize the contact of roller total length curved surface; (4) improved the precision of curve surface of raceway in freewheel clutch, and the high conformity of precision.
Accompanying drawing explanation
Above-mentioned and other side of the present invention and feature are by from presenting the explanation of embodiment is clear below in conjunction with accompanying drawing, in the accompanying drawings:
Fig. 1 is according to the process chart of curve surface of raceway processing method in freewheel clutch of the present invention;
Fig. 2 a-g is the change in shape procedure chart of application the inventive method products obtained therefrom, wherein Fig. 2 a and Fig. 2 b represent blanking base, Fig. 2 c represents the state after blank jumping-up, Fig. 2 d and Fig. 2 e represent that blank bores the state after boring fabrication hole, and Fig. 2 f and Fig. 2 g are the schematic diagrames that shows the interior curve surface of raceway of the freewheel clutch after curve surface of raceway in backward extrusion; And
Fig. 3 is the structure cutaway view schematically showing according to shaping dies of the present invention.
The specific embodiment
Describe with reference to the accompanying drawings illustrative of the present invention, non-limiting example in detail, processing method and the shaping dies of curve surface of raceway in freewheel clutch according to the present invention are further described.
Existing freewheel clutch mainly adopts cutting working method, and the operation of this method is more and production efficiency is low.Therefore, adopt cold reverse extrusion manufacturing process to manufacture curve surface of raceway in freewheel clutch and become a kind of trend.
Below, with reference to Fig. 1 and Fig. 2, illustrate according to curve surface of raceway processing method in freewheel clutch of the present invention.In described freewheel clutch, curve surface of raceway processing method comprises:
Step 01: blanking base;
Step 02: the blank of making is annealed;
Step 03: blank is carried out to ball blast and phospholeumization processing, and this step is conventional operation is mainly to improve blank surface quality and lubricated;
Step 04: blank is carried out to jumping-up;
Step 05: blank is bored to boring fabrication hole; With
Step 06: blank is placed in the die of shaping dies and by punch reverse extrusion, to form the interior curve surface of raceway of freewheel clutch by a Plastic Forming.
Preferably, further comprising the steps according to the step 02 of processing method of the present invention: blank is heated in vacuum drying oven to 710～740 ℃, for example, by blank heating to 725 ℃; Be incubated 200～300 minutes with to blank spheroidizing, be preferably incubated 250 minutes; With the furnace temperature of vacuum drying oven is down to after 530～580 ℃, blank come out of the stove and air cooling to room temperature.For example, the furnace temperature of vacuum drying oven can be down to after 555 ℃, by blank come out of the stove and air cooling to room temperature.In the present invention, by as mentioned above the temperature of annealing in process and temperature retention time being controlled, can make the hardness of blank be less than rockwell b scale chi 85 MPas, thereby contribute to follow-up processing so that the interior curve surface of raceway of the final freewheel clutch obtaining has high accuracy.
According to a preferred embodiment of the present invention, in step 01, blanking diameter be freewheel clutch finished product maximum gauge 75%～85%, cutting stock weight is 105%～110% of freewheel clutch finished weight.More preferably, blanking diameter is 80% of finished product maximum gauge, and cutting stock weight is finished weight 107.5%.For example, if the maximum gauge of freewheel clutch slide finished product is 60mm, the control range of blanking diameter is 45mm～51mm, if freewheel clutch slide finished weight is 1385 grams, the control range of cutting stock weight is 1454 grams～1524 grams.By blanking diameter and cutting stock weight are controlled to the precision that can further improve curve surface of raceway in freewheel clutch.In addition, step 01 preferably can also comprise and adopts method for turning to process blank, to remove groove and the crackle of blank surface.
According to a further advantageous embodiment of the invention, the jumping-up rate of the jumping-up of blank being processed is less than 55%.Generally, the jumping-up rate allowable of material is 60%, and the processing method of the present invention rate of urging controls to and be less than 55%, can avoid like this material surface in upsetting process to occur crackle.
In freewheel clutch of the present invention, curve surface of raceway processing method, by accurate cold forging, adopts reverse extrusion, once completes the Plastic Forming of curve surface of raceway in freewheel clutch, and can obtain the interior curve surface of raceway that meets high dimensional accuracy requirement.
Illustrate below according to the concrete example of curve surface of raceway in said method processing freewheel clutch, this example is only in order more clearly to describe the present invention, rather than the present invention is limited.
Take with curve surface of raceway in 20 Cr-Mn-Ti material precision form M350 freewheel clutches is example, and its technological process is:
1. blanking base, selecting diameter is the hot rolling round bar of φ 50mm, material trademark is 20 Cr-Mn-Tis, 1495 grams of cutting stock weights.Heart carrier is contained in behind cylindrical one end of workpiece, with top two centre bores that withstand.Rough turn outside diameter is between φ 48.10mm-φ 48.25mm and 2 * 45 ° of end-bevelings, reverse end for end again heart carrier to be contained in other one end of cylindrical of workpiece, with top two centre bores that withstand, rough turn other end outside diameter is between φ 48.10mm-φ 48.25mm and 2 * 45 ° of end-bevelings.
2. annealing is heated to blank 710～740 ℃ in vacuum drying oven, is incubated 200～300 minutes spheroidizings, and furnace temperature is down to 530～580 ℃, and the air cooling of coming out of the stove, to room temperature, makes blank hardness be less than rockwell b scale chi 85 MPas.
3. conventional ball blast and phospholeumization are processed, and improve blank surface quality and lubricated.
4. jumping-up, under jumping-up, outer round surface part is to φ
be highly 32mm, and guarantee upper outer round surface part φ
be highly
5. bore boring fabrication hole to φ
6. curve surface of raceway in anti-squeezing, is placed on die center by blank, by punch, adopts reverse extrusion, once completes the Plastic Forming of curve surface of raceway in freewheel clutch.
Next, the shaping dies for curve surface of raceway processing method in above-described freewheel clutch with reference to Fig. 3 explanation.Described shaping dies comprises punch assemblies and die assembly.
Punch assemblies comprises punch case 1, fairlead 2, punch 3 and punch insert 4.Punch case 1 is arranged on the upper bed-plate 10 of mould bases, so that punch is fixed to mould bases, and can add and protect man-hour punch not sustain damage at hydraulic press.Fairlead 2 is arranged on punch case 1 and is enclosed within on punch 3, thereby during curve surface of raceway, guarantees that interior curve surface of raceway and cylindrical are coaxial in processing freewheel clutch.Punch 3 has the gabarit shape corresponding with the shape of the interior curve surface of raceway of freewheel clutch for completing the shaping of interior curve surface of raceway, and is provided with through hole.Preferably, punch 3 is made by high tenacity and anti abrasive high speed die steel material, for example YXR3, DC53 and similar material.Punch insert 4 interference fits in the through hole of punch and coaxial with punch 3, thereby improve punch stress state in the course of the work, the mould being integrally formed with punch with traditional punch insert is compared, and the working life of punch can be improved to 50%.
Die assembly comprises die 5, die plate insert 6, stripping attachment 7, pressure block 8 and material returned slide block 9.As shown in Figure 3, pressure block 8 is arranged on the lower bottom base 11 of mould bases and is provided with through hole, and die 5 is arranged on pressure block 8, makes pressure block 8 support dies 5.Die plate insert 6 interference fits in the die cavity of die and coaxial with die 5, thereby improve die stress state in the course of the work, the mould being integrally formed with die with traditional die plate insert is compared, and the working life of die can be improved to 50%.For supporting the material returned slide block 9 of stripping attachment 7, be arranged on the through hole of pressure block 8 and be positioned at lower bottom base 11, and being provided with through hole.Stripping attachment 7 passes the through hole of material returned slide block 9, and is arranged in pressure block 8 for the material returned.
According to one embodiment of present invention, the land effective width of punch is between 2～3.5mm.Punch land and basic mode transition cone angle are 4～6 degree.In order to guarantee curved surface equal indicative, punch machining accuracy is not less than 2 '.The die cavity of die 5 has the shape corresponding with the profile of freewheel clutch, and blank is being placed between processing period on die plate insert 6.Die adopts three ply stress circle combined interferences to join to press and forms, and 0.3～0.4% of the appearance and size that the magnitude of interference is freewheel clutch is calculated, so that the strain when reducing die and being shaped, thereby the service life of effectively improving die.
The present invention contain any made within the spirit and scope of the present invention substitute, modification, equivalent way and scheme.In order to make those skilled in the art that the present invention is had thoroughly and be understood, in the preferred embodiment of the present invention, describe concrete details in detail, and do not have for a person skilled in the art the description of these details also can understand the present invention completely.In addition, for fear of essence of the present invention is caused to unnecessary obscuring, do not describe well-known method, process and flow process etc. in detail.
Finally it should be noted that above embodiment is only illustratively in order to describe technical scheme of the present invention rather than to limit the invention.Obviously it will be understood by those skilled in the art that in the situation that not deviating from spirit of the present invention and principle and can change, its scope claims with and equivalent in limit.
Claims (10)
1. a processing method for curve surface of raceway in freewheel clutch, comprises the following steps:
Step 01: blanking base;
Step 02: the blank of making is annealed;
Step 03: blank is carried out to ball blast and phospholeumization processing;
Step 04: blank is carried out to jumping-up;
Step 05: blank is bored to boring fabrication hole; With
Step 06: blank is placed in the die of shaping dies and by punch reverse extrusion, to form the interior curve surface of raceway of freewheel clutch by a Plastic Forming.
2. processing method according to claim 1, described step 02 comprises the following steps:
Blank is heated in vacuum drying oven to 710～740 ℃;
Be incubated 200～300 minutes with to blank spheroidizing; With
Temperature in described vacuum drying oven is down to after 530～580 ℃, blank come out of the stove and air cooling to room temperature.
3. processing method according to claim 1, wherein, in described step 01, blanking diameter be freewheel clutch finished product maximum gauge 75%～85%, cutting stock weight be freewheel clutch finished product weight 105%～110%.
4. processing method according to claim 1, wherein, described step 01 also comprises that turning turned blank is to remove groove and the crackle of blank surface.
5. processing method according to claim 1, wherein, in described step 04, jumping-up rate is less than 55%.
6. for a shaping dies for the processing method described in claim 1-5 any one, described shaping dies comprises punch assemblies and die assembly, wherein:
Described punch assemblies comprises:
Punch, described punch is provided with through hole;
Punch case, described punch case is arranged on upper bed-plate;
Fairlead, described fairlead is arranged on described punch case and is enclosed within on described punch; With
Punch insert, described punch insert interference fits is in the through hole of described punch and coaxial with described punch; Described die assembly comprises:
Pressure block, described pressure block is arranged on lower bottom base and is provided with through hole;
Die, described die is arranged on described pressure block;
Die plate insert, described die plate insert interference fits is in the die cavity of described die and coaxial with described die, and described blank is being placed between processing period on described die plate insert;
Material returned slide block, described material returned slide block is arranged in the through hole of described pressure block and is positioned on described lower bottom base, and described material returned slide block is provided with through hole; With
Stripping attachment, described stripping attachment passes the through hole of described material returned slide block and is arranged in described pressure block for the material returned.
7. shaping dies according to claim 6, wherein, the land effective width of described punch is between 2～3.5mm.
8. shaping dies according to claim 6, wherein, punch land and basic mode transition cone angle are 4～6 degree.
9. shaping dies according to claim 6, wherein, described die adopts three ply stress circle combined interferences to join to press and forms, 0.3～0.4% of the appearance and size that the magnitude of interference is freewheel clutch.
10. shaping dies according to claim 6, wherein, described punch is made by high speed die steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310645960.9A CN103639675B (en) | 2013-12-03 | 2013-12-03 | The processing method of curve surface of raceway and shaping dies in freewheel clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310645960.9A CN103639675B (en) | 2013-12-03 | 2013-12-03 | The processing method of curve surface of raceway and shaping dies in freewheel clutch |
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| Publication Number | Publication Date |
|---|---|
| CN103639675A true CN103639675A (en) | 2014-03-19 |
| CN103639675B CN103639675B (en) | 2016-07-06 |
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| CN201310645960.9A Expired - Fee Related CN103639675B (en) | 2013-12-03 | 2013-12-03 | The processing method of curve surface of raceway and shaping dies in freewheel clutch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108457A (en) * | 2015-09-08 | 2015-12-02 | 丹阳市恒基工具有限公司 | Processing method of overall passive plate |
| CN108213834A (en) * | 2018-01-09 | 2018-06-29 | 盐城工学院 | A kind of roll processing device and system |
| CN114289536A (en) * | 2021-12-31 | 2022-04-08 | 玉环普天单向器有限公司 | Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02211925A (en) * | 1989-02-13 | 1990-08-23 | Honda Motor Co Ltd | Continuous cold forming method for cup-shaped part |
| CN101306442A (en) * | 2007-05-15 | 2008-11-19 | 张华文 | Process method of tripod ball inner sliding sleeve capable of axially moving and back extrusion concave die |
| KR20080102033A (en) * | 2007-05-17 | 2008-11-24 | 한국기계연구원 | Manufacturing method using of back pressure forming type cold working device for extruded forging workpiece |
| CN101214510B (en) * | 2008-01-08 | 2010-10-13 | 江苏森威集团有限责任公司 | Blind hole internal gear precision forming method and internal tooth forming mold |
| CN103341737A (en) * | 2013-07-12 | 2013-10-09 | 盐城工学院 | Machining method for improving coaxiality of special-shaped cavity and internal spline of start guide cylinder |
-
2013
- 2013-12-03 CN CN201310645960.9A patent/CN103639675B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02211925A (en) * | 1989-02-13 | 1990-08-23 | Honda Motor Co Ltd | Continuous cold forming method for cup-shaped part |
| CN101306442A (en) * | 2007-05-15 | 2008-11-19 | 张华文 | Process method of tripod ball inner sliding sleeve capable of axially moving and back extrusion concave die |
| KR20080102033A (en) * | 2007-05-17 | 2008-11-24 | 한국기계연구원 | Manufacturing method using of back pressure forming type cold working device for extruded forging workpiece |
| CN101214510B (en) * | 2008-01-08 | 2010-10-13 | 江苏森威集团有限责任公司 | Blind hole internal gear precision forming method and internal tooth forming mold |
| CN103341737A (en) * | 2013-07-12 | 2013-10-09 | 盐城工学院 | Machining method for improving coaxiality of special-shaped cavity and internal spline of start guide cylinder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108457A (en) * | 2015-09-08 | 2015-12-02 | 丹阳市恒基工具有限公司 | Processing method of overall passive plate |
| CN105108457B (en) * | 2015-09-08 | 2017-06-30 | 丹阳市恒基工具有限公司 | The processing method of overall driven disc |
| CN108213834A (en) * | 2018-01-09 | 2018-06-29 | 盐城工学院 | A kind of roll processing device and system |
| CN114289536A (en) * | 2021-12-31 | 2022-04-08 | 玉环普天单向器有限公司 | Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof |
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|---|---|
| CN103639675B (en) | 2016-07-06 |
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