CN106694789B - die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft - Google Patents
die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft Download PDFInfo
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- CN106694789B CN106694789B CN201710092512.9A CN201710092512A CN106694789B CN 106694789 B CN106694789 B CN 106694789B CN 201710092512 A CN201710092512 A CN 201710092512A CN 106694789 B CN106694789 B CN 106694789B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to a die forging process of an outer star wheel blank and an inner star wheel blank for an automobile transmission shaft, which is characterized by comprising the following steps of: s1, pre-forging: the shape between the upper mold core and the lower mold core of the pre-forging mold is a structure that an outer star wheel blank and an inner star wheel blank are connected into a whole, wherein the bottom of the outer star wheel blank and the upper part of the inner star wheel blank are connected into a whole; s2, finish forging: further forging and forming the blank after the pre-forging; s3, punching and dividing: and separating the inner star wheel blank and the outer star wheel blank of the blank after final forging in a stamping mode. The invention analyzes the shape, the size and the technical requirements of workpieces made of the same metal material, and scientifically formulates the forging process comprehensively so as to achieve the purposes of labor saving and material saving.
Description
Technical Field
The invention relates to a die forging process and die forging equipment, in particular to a die forging process and die forging equipment for blanks of an outer star wheel and an inner star wheel of an automobile transmission shaft, and belongs to the technical field of die forging processes of automobile transmission shaft parts.
Background
The inner star wheel and the outer star wheel of the automobile transmission shaft are assembled together, and transmission in the rotating direction is realized through the balls. The inner star wheel and the outer star wheel of the automobile transmission shaft are important parts of the automobile transmission shaft.
In the manufacturing process of the existing inner star wheel and the existing outer star wheel, blanks are respectively forged in a die forging mode, and then the blanks are machined.
In a transmission manufacturing mode, the single forgings of the inner star wheel blank and the outer star wheel blank are forged, and the connected skin is generated during punching, so that the production efficiency is low, the material utilization rate is low, and the workload is large in the production process; the outer star wheel and the inner star wheel for the automobile transmission shaft are provided with more punched holes, the material consumption of punched and skin-connected materials is more, the utilization rate of the materials is low, and the subsequent processing cost is high.
Disclosure of Invention
the purpose of the invention is: the single piece forging of the inner star wheel blank and the outer star wheel blank is changed into 2 pieces to be combined together for blanking and forging, so that better effects can be obtained from multiple aspects: the labor intensity of workers is reduced, the production efficiency is improved, metal materials are saved, and the energy consumption is reduced.
The invention adopts the following technical scheme:
The die forging process of the blank of the outer star wheel and the inner star wheel for the automobile transmission shaft is characterized by comprising the following steps of: s1, pre-forging: the shape between the upper mold core and the lower mold core of the pre-forging mold is a structure that an outer star wheel blank and an inner star wheel blank are connected into a whole, wherein the bottom of the outer star wheel blank and the upper part of the inner star wheel blank are connected into a whole; s2, finish forging: further forging and forming the blank after the pre-forging; s3, punching and dividing: and separating the inner star wheel blank and the outer star wheel blank of the blank after final forging in a stamping mode.
Further, in the final forging: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is A, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is B, the width of the connecting part of the inner star wheel and the outer star wheel is C, the height of the outer star wheel is F, and the height of the inner star wheel is H; when in pre-forging: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is D, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is E, the height of the outer star wheel is G, and the height of the inner star wheel is I; then: 3-4mm for A, 0-5mm for B, 0.5-0.8mm for C, A +1mm for D, B, F +1mm for G, and H +0.5mm for I.
Furthermore, when the punching and cutting are carried out, the connecting parts of the inner star wheel and the outer star wheel adopt direct punching and trimming.
The device for the die forging process of the blank of the outer star wheel and the inner star wheel for the automobile transmission shaft, which is characterized by comprising the following steps of: comprises a pre-forging device, a finish forging device and a stamping and cutting device; the space between the upper die core and the lower die core of the pre-forging equipment is in a pre-forging structure in which an outer star wheel blank and an inner star wheel blank are connected into a whole, wherein the bottom of the outer star wheel blank and the upper part of the inner star wheel blank are connected into a whole; the space between the upper die core and the lower die core of the final forging equipment is in a final forging structure formed by connecting an outer star wheel blank and an inner star wheel blank into a whole; the stamping and cutting equipment comprises a sleeve forging inner forging piece punching trimming punch 13 and a stripper plate 8, wherein the sleeve forging inner forging piece punching trimming punch is fixed below an upper die base 10; the stripper plate 8 is connected with the upper die base 10 through an elastic mechanism and corresponds to the upper part of the outer star wheel blank part of the blank to be forged; the sleeve forging inner forging piece punching and trimming punch 13 is fixedly connected with the upper die base 10 and corresponds to the upper part of the inner star wheel blank part of the blank to be forged.
Further, the outer diameter of the sleeve forging inner forging punching trimming punch 13 is slightly smaller than the minimum inner diameter of the outer star wheel blank part.
Further, the die cavity of the finish forging apparatus: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is A, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is B, the width of the connecting part of the inner star wheel and the outer star wheel is C, the height of the outer star wheel is F, and the height of the inner star wheel is H; die cavity of the pre-forging apparatus: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is D, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is E, the height of the outer star wheel is G, and the height of the inner star wheel is I; then: 3-4mm for a, 0-5mm for B, 0.5-0.8mm for C, 0.1 mm for D, (a +1) mm for E, (F +1) mm for G, and (H +0.5) mm for I.
furthermore, the pre-forging equipment and the final forging equipment are both of two-half type assembly structures.
The invention has the beneficial effects that:
1) The shape, the size and the technical requirements of workpieces made of the same metal material are analyzed, and the forging process is scientifically established comprehensively, so that the purposes of labor saving and material saving are achieved.
2) Compared with the traditional forging method, the machining allowance is reduced, the weight of a single-piece forging piece is reduced, the cutting machining is facilitated, the clamping times of a workpiece are reduced, and favorable conditions are created for the cutting machining;
3) the metal of the blanking saw cut is saved, the blanking working time is reduced, the twice heating is reduced, the oxidation is reduced, the quality of the forged piece is reduced, and the fuel is saved;
4) the quantity of the trimming waste is greatly reduced, the utilization rate of materials is improved, and the cost is reduced;
5) The single piece forging of the inner star wheel blank and the outer star wheel blank is changed into 2 pieces to be combined together for blanking and forging, so that better effects can be obtained from multiple aspects: the labor intensity of workers is reduced, the production efficiency is improved, metal materials are saved, and the energy consumption is reduced.
6) The elastic region adopts Hook law, the plastic region adopts Prandtl-reus constitutive equation and Mises yield criterion to analyze the problems of instability, yield and the like of the workpiece, technological parameters such as A, B, C, D, E, F, G, H, I and the like are optimized, the generation of defects is predicted, the forming quality is analyzed, the existing main problems are solved in the design stage, the quality of the sleeve forging forge piece is improved, and the economic benefit is improved.
7) On the premise of ensuring the forming of the forged piece, the material utilization rate is improved by more than 10 percent;
8) the labor efficiency is improved by more than 45%.
Drawings
Fig. 1 is a sectional view of an external star wheel for an automobile drive shaft.
fig. 2 is a front view of the external star wheel for the automobile propeller shaft corresponding to fig. 1.
Fig. 3 is a sectional view of an inner star wheel for an automobile transmission shaft, and the inner star wheel and an outer wheel are matched through marbles, so that synchronous rotation can be realized.
fig. 4 is a schematic view of a die structure of the forging apparatus or the finish forging apparatus.
FIG. 5 is a drawing of sleeve forging inner and outer forging pre-heated forgings.
FIG. 6 is a drawing of a finish forged hot forging of sleeve forged inner and outer forgings.
Fig. 7 is a schematic view of the sleeve forging of the upper and lower die cores of the blocker.
Fig. 8 is a schematic view of the upper and lower die cores of the sleeve forging finish forging die.
Fig. 9 is a schematic structural view of the die cutting apparatus.
In the drawing, 1, a lower die base, 2, a punch base left and right adjusting bolt, 3, a left support plate, 4, a heavy-duty rectangular spring, 5, a spring guide post, 6, a trimming female die left and right adjusting bolt, 7, a trimming female die adjusting bolt fixing frame, 8, a stripper, 9, a stripper spring, 10, an upper die base, 11, a punching trimming punch die handle fixing pin, 12, a punching trimming punch die handle, 13, a sleeve forging inner forging piece punching trimming punch, 14, a sleeve forging inner and outer forging piece, 15, a sleeve forging inner forging piece punching punch, 16, a sleeve forging inner forging piece lower pressing die cavity, 17, a trimming female die front and rear adjusting bolt, 18, a sleeve forging inner forging piece punching trimming die, 19, a lower pressing die, 20, a lower pressing die fixing plate guide block, 21, a lower pressing die fixing plate, 22, a right support plate, 23, a punching punch fixing seat, 24, an adjusting bolt fastening nut, 25, a punch base front and rear adjusting bolt, 26. the bolt supporting plate is adjusted forwards and backwards by the punch seat.
Detailed Description
the invention is further described with reference to the following figures and specific examples.
The first embodiment is as follows:
Referring to fig. 4-9, the die forging process of the blank of the outer star wheel and the inner star wheel for the automobile transmission shaft comprises the following steps: s1, pre-forging: the shape between the upper mold core and the lower mold core of the pre-forging mold is a structure that an outer star wheel blank and an inner star wheel blank are connected into a whole, wherein the bottom of the outer star wheel blank and the upper part of the inner star wheel blank are connected into a whole; s2, finish forging: further forging and forming the blank after the pre-forging; s3, punching and dividing: and separating the inner star wheel blank and the outer star wheel blank of the blank after final forging in a stamping mode.
Referring to fig. 5-6, at final forging: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is A, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is B, the width of the connecting part of the inner star wheel and the outer star wheel is C, the height of the outer star wheel is F, and the height of the inner star wheel is H; when in pre-forging: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is D, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is E, the height of the outer star wheel is G, and the height of the inner star wheel is I; then: 3-4mm for A, 0-5mm for B, 0.5-0.8mm for C, A +1mm for D, B, F +1mm for G, and H +0.5mm for I.
Referring to fig. 9, during the punching and cutting, the connecting part of the inner star wheel and the outer star wheel adopts direct punching and trimming.
Example two:
The equipment for the die forging process of the blank of the outer star wheel and the inner star wheel for the automobile transmission shaft comprises pre-forging equipment, finish forging equipment and stamping and cutting equipment; the space between the upper die core and the lower die core of the pre-forging equipment is in a pre-forging structure in which an outer star wheel blank and an inner star wheel blank are connected into a whole, wherein the bottom of the outer star wheel blank and the upper part of the inner star wheel blank are connected into a whole; the space between the upper die core and the lower die core of the final forging equipment is in a final forging structure formed by connecting an outer star wheel blank and an inner star wheel blank into a whole; the stamping and cutting equipment comprises a sleeve forging inner forging piece punching trimming punch 13 and a stripper plate 8, wherein the sleeve forging inner forging piece punching trimming punch is fixed below an upper die base 10; the stripper plate 8 is connected with the upper die base 10 through an elastic mechanism and corresponds to the upper part of the outer star wheel blank part of the blank to be forged; the sleeve forging inner forging piece punching and trimming punch 13 is fixedly connected with the upper die base 10 and corresponds to the upper part of the inner star wheel blank part of the blank to be forged.
Referring to fig. 9, the outer diameter of the sleeve forging inner forging punch trimming punch 13 is slightly smaller than the smallest inner diameter of the outer star wheel blank portion.
referring to fig. 5-6, the die cavity of the finish forging apparatus: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is A, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is B, the width of the connecting part of the inner star wheel and the outer star wheel is C, the height of the outer star wheel is F, and the height of the inner star wheel is H; die cavity of the pre-forging apparatus: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is D, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is E, the height of the outer star wheel is G, and the height of the inner star wheel is I; then: 3-4mm for a, 0-5mm for B, 0.5-0.8mm for C, 0.1 mm for D, (a +1) mm for E, (F +1) mm for G, and (H +0.5) mm for I.
The scheme simulates the process of forming the sleeve forging die forging technology from the blank to the forge piece based on Deform, observes and summarizes the metal flow law, calculates the stress field, the strain field and the load and energy required by deformation, and gives the change of the geometric shape, the size and the performance of the blank in the forming process. And (3) by combining practical discussion on the feasibility of the sleeve forging and comparing and verifying the simulation results of different process parameters with the experimental results, an optimal process scheme is worked out. The elastic region adopts Hook law, the plastic region adopts Pranddt l-reus constitutive equation and Mises yield criterion to analyze the problems of instability, yield and the like of the workpiece, technological parameters such as A, B, C, D, E, F, G, H, I and the like are optimized, the generation of defects is predicted, the forming quality is analyzed, the existing main problems are solved in the design stage, the quality of the sleeve forging forge piece is improved, and the economic benefit is improved.
The above is a preferred embodiment of the present invention, and those skilled in the art can make various changes or modifications thereto without departing from the general concept of the present invention, and such changes or modifications should fall within the scope of the claimed invention.
Claims (4)
1. The die forging process of the blank of the outer star wheel and the inner star wheel for the automobile transmission shaft is characterized by comprising the following steps of:
S1, pre-forging: the shape between the upper mold core and the lower mold core of the pre-forging mold is a structure that an outer star wheel blank and an inner star wheel blank are connected into a whole, wherein the bottom of the outer star wheel blank and the upper part of the inner star wheel blank are connected into a whole;
S2, finish forging: further forging and forming the blank after the pre-forging;
S3, punching and dividing: dividing an inner star wheel blank and an outer star wheel blank of the blank after final forging in a stamping mode;
And (3) during final forging: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is A, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is B, the width of the connecting part of the inner star wheel and the outer star wheel is C, the height of the outer star wheel is F, and the height of the inner star wheel is H;
when in pre-forging: the height of the connecting part of the inner star wheel blank and the outer star wheel blank is D, the distance from the connecting part of the inner star wheel and the outer star wheel to the upper end of the inner star wheel is E, the height of the outer star wheel is G, and the height of the inner star wheel is I;
Then: 3-4mm for a, 0-5mm for B, 0.5-0.8mm for C, 0.1 mm for D, E, F +1, and I, 0.5mm for H;
When the punching and cutting are carried out, the connecting parts of the inner star wheel and the outer star wheel adopt direct punching and trimming.
2. the device for the die forging process of the blank of the outer star wheel and the inner star wheel for the automobile transmission shaft, which is characterized by comprising the following steps of:
comprises a pre-forging device, a finish forging device and a stamping and cutting device;
The space between the upper die core and the lower die core of the pre-forging equipment is in a pre-forging structure in which an outer star wheel blank and an inner star wheel blank are connected into a whole, wherein the bottom of the outer star wheel blank and the upper part of the inner star wheel blank are connected into a whole;
the space between the upper die core and the lower die core of the final forging equipment is in a final forging structure formed by connecting an outer star wheel blank and an inner star wheel blank into a whole;
the stamping and cutting equipment comprises a sleeve forging inner forging piece punching trimming punch (13) and a stripper plate (8), wherein the sleeve forging inner forging piece punching trimming punch is fixed below an upper die holder (10);
The stripper plate (8) is connected with the upper die base (10) through an elastic mechanism and corresponds to the upper part of the outer star wheel blank part of the blank to be forged;
The sleeve forging inner forging piece punching and trimming punch (13) is fixedly connected with the upper die base (10) and corresponds to the upper part of the inner star wheel blank part of the blank to be forged.
3. The apparatus for the external star wheel and internal star wheel blank die forging process for the automobile transmission shaft according to claim 2, wherein: the outer diameter of the sleeve forging inner forging punching trimming punch (13) is slightly smaller than the minimum inner diameter of the outer star wheel blank part.
4. The apparatus for the external star wheel and internal star wheel blank die forging process for the automobile transmission shaft according to claim 2, wherein: the pre-forging equipment and the final forging equipment are both of two-half type assembly structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092512.9A CN106694789B (en) | 2017-02-21 | 2017-02-21 | die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092512.9A CN106694789B (en) | 2017-02-21 | 2017-02-21 | die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft |
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| Publication Number | Publication Date |
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| CN106694789A CN106694789A (en) | 2017-05-24 |
| CN106694789B true CN106694789B (en) | 2019-12-10 |
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| CN201710092512.9A Active CN106694789B (en) | 2017-02-21 | 2017-02-21 | die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238336A (en) * | 2019-07-24 | 2019-09-17 | 泰州浙华机械精锻有限公司 | A kind of high-precision forging closing forging technology |
| CN111266463A (en) * | 2020-03-20 | 2020-06-12 | 山中合金（宁波）有限公司 | Novel inner star wheel forming die structure |
| CN111451436A (en) * | 2020-05-13 | 2020-07-28 | 上海长特锻造有限公司 | Forging process of high-strength internal star wheel |
| CN112845795B (en) * | 2020-12-28 | 2023-03-21 | 浙江格洛博机械科技股份有限公司 | Continuous spline forming equipment for inner hub of gearbox brake |
| CN112474404A (en) * | 2021-01-12 | 2021-03-12 | 江苏南洋中京科技有限公司 | Screening device for forge piece raw material slot sawing machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008173661A (en) * | 2007-01-17 | 2008-07-31 | Ntn Corp | Die device for manufacturing hub ring, and method for manufacturing hub ring |
| CN201720382U (en) * | 2010-07-26 | 2011-01-26 | 上海爱知锻造有限公司 | Mold cavity for forging inner and outer star wheels |
| CN103419003B (en) * | 2013-09-18 | 2016-04-20 | 浙江向隆机械有限公司 | A kind of constant velocity driveshaft ball cage processing technology |
| CN104494067A (en) * | 2014-12-24 | 2015-04-08 | 天津市久跃科技有限公司 | Injection part sprue flash cutting device |
| CN104889300A (en) * | 2015-06-12 | 2015-09-09 | 南京国际船舶设备配件有限公司 | Closed die forging die for valve seat of diesel engine and processing technique of die |
| CN206550284U (en) * | 2017-02-21 | 2017-10-13 | 上海交大中京锻压有限公司 | Out star wheel used for vehicle transmission shaft, interior star-wheel blank forging equipment |
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Effective date of registration: 20180424 Address after: No. 508, Yong Yong Road, Qing Cun town, Fengxian District, Shanghai Applicant after: Shanghai JD Chukyo Forging & Stamping Co., Ltd. Applicant after: Jiangsu Nanyang Zhongjing science and Technology Co., Ltd. Address before: No. 508, Yong Yong Road, Qing Cun town, Fengxian District, Shanghai Applicant before: Shanghai JD Chukyo Forging & Stamping Co., Ltd. |
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