CN113399609B - Shaft-disc-fork force transmission key piece hot near forming control method - Google Patents
Shaft-disc-fork force transmission key piece hot near forming control method Download PDFInfo
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- CN113399609B CN113399609B CN202110640920.XA CN202110640920A CN113399609B CN 113399609 B CN113399609 B CN 113399609B CN 202110640920 A CN202110640920 A CN 202110640920A CN 113399609 B CN113399609 B CN 113399609B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 238000005242 forging Methods 0.000 claims abstract description 112
- 238000003825 pressing Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 21
- 239000002184 metal Substances 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 25
- 238000005520 cutting process Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000003856 thermoforming Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- B21J5/008—Incremental forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
-
- 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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- 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
- B21K29/00—Arrangements for heating or cooling during processing
-
- 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
- B21K7/00—Making railway appurtenances; Making vehicle parts
- B21K7/12—Making railway appurtenances; Making vehicle parts parts for locomotives or vehicles, e.g. frames, underframes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a method for controlling the hot near forming of a shaft-disc-fork-shaped force transmission key piece, which comprises the following steps: preparing a pretreated blank; upsetting the head of the pre-treated blank; drawing out the stem part of the pretreated blank; locally flattening the head of the pretreated blank; pre-forging; final forging; the upper die of the upsetting die is a flat anvil with a circular arc-shaped protuberance in the middle; the invention designs the middle part of the upsetting flat anvil into a circular arc-shaped protuberance, and distributes metal to the blank in advance in the upsetting process; compared with the traditional flat anvil, the problems of excessive flash and easy folding defect of the head of the pre-forging piece are effectively solved.
Description
Technical Field
The invention relates to the technical field of fork forging forming, in particular to a hot near forming control method for a shaft-disc-fork force transmission key piece.
Background
The key force transmission component is used as the main force bearing, force transmission and control component in the running of the transportation means, the running working condition is complex, and the key force transmission component not only supports the weight of the vehicle body, but also transmits the steering moment and bears the braking moment, so the key force transmission component has very strict requirements on the mechanical property and the shape structure, and has great manufacturing difficulty. In the traditional forging production process, the product is usually produced by adopting a vertical machine forging or horizontal hammer forging process after the rod part is drawn, but the process has the problems of low forging precision and material utilization rate, high labor intensity of workers, low production efficiency and the like. Meanwhile, the local streamline turbulence of the forge piece is easy to cause, and the problem of fracture failure occurs in the loaded concentrated area at the joint part of the flange plate and the rod part, so that the safety of vehicle operation is not facilitated.
In view of the above drawbacks, the present inventors have finally achieved the present invention through long-time studies and practices.
Disclosure of Invention
In order to solve the technical defects, the technical scheme adopted by the invention is that the invention provides a method for controlling the hot near forming of a shaft-disc-fork force transmission key piece, which is characterized by comprising the following steps:
s1, preparing a pretreated blank;
s2, upsetting the head of the pretreated blank;
s3, drawing out the rod part of the pretreated blank;
s4, locally flattening the head of the pretreated blank;
s5, pre-forging;
s6, final forging;
in step S2, the upsetting die upper die is a flat anvil with a circular arc-shaped protrusion in the middle.
Preferably, in step S1, the rod-shaped ingot is cut into a cylindrical ingot, and the surface scale is removed to obtain the pretreated ingot.
Preferably, in step S2, the pretreated blank is heated to 130-180 ℃, the surface of the pretreated blank is coated with an graphite solution, then the pretreated blank is continuously heated to 1200 ℃, the temperature is kept for 90 minutes, the upsetting die is heated to 200-400 ℃, the head of the pretreated blank is upset, and the rod-shaped part of the pretreated blank is kept in a rod shape.
Preferably, the arc radius of the arc-shaped protrusion is R50 to R200.
Preferably, in step S3, the rod portion is drawn, the drawing passes are 4 to 10 times, and the pressing amount of each pass is 5mm to 20mm.
Preferably, in step S4, the head is locally flattened, and the pressing amount is 5 mm-10 mm.
Preferably, in step S5, the blank obtained after the completion of step S4 is hot-die-forged by using a pre-forging die, wherein the temperature interval of the upper die and the lower die of the pre-forging die is 200 ℃ to 400 ℃, and the temperature interval of the blank is 800 ℃ to 1200 ℃.
Preferably, in step S6, the pre-forging and the final forging die are heated and kept at a temperature of 200-400 ℃, and the temperature of the pre-forged blank is 800-1200 ℃.
Preferably, in step S5, the pressing speed of the upper die of the pre-forging die is 30mm/S until the upper die and the lower die of the pre-forging die are completely closed, and the tonnage of pre-forging is 1250 tons.
Preferably, in step S6, the press-down speed of the upper die of the final forging die is 30mm/S for final forging, and the tonnage of the final forging is 1390 tons.
Compared with the prior art, the invention has the beneficial effects that: 1, designing the middle part of an upsetting flat anvil into a circular arc-shaped protrusion, and pre-distributing metal to blanks in the upsetting process; compared with the traditional flat anvil, the problems of excessive flash and easy folding defect of the head of the pre-forging piece are effectively solved; the invention precisely controls the metal flow direction and improves the local defect by controlling the forming temperature and the forming speed, thereby solving the problems that the rod part is difficult to form, and the fork part and the flange part are easy to have folding defects and streamline turbulence.
Drawings
FIG. 1 is a schematic diagram of a forging of the shaft-disc-fork force transfer key;
FIG. 2 is a flow chart of the shaft-disc-fork force transfer key thermoforming control method;
FIG. 3 is a finite element model diagram of the shaft disk fork force transfer key part during the hot near forming control method;
FIG. 4 is a schematic diagram of the upper die of the upsetting process;
FIG. 5 is a schematic view of the lower die of the upsetting process;
FIG. 6 is a schematic view of the structure of the pre-processed blank after upsetting;
FIG. 7 is a diagram showing the effect of the final forging completion comparison;
FIG. 8 is a comparative diagram of folding defects of a pre-forging with circular arc-shaped protrusions of different radii;
FIG. 9 is a graph of the plastic strain distribution of the shaft-disc-fork force transmission key prepared using the present invention;
FIG. 10 is an effective stress distribution diagram of the shaft-disc-fork force transmission key prepared using the present invention;
fig. 11 is a graph showing the temperature profile of the shaft-disc-fork force transmission key prepared using the present invention.
Detailed Description
The above and further technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, fig. 1 is a schematic diagram of a forging of the shaft-disc-fork force transmission key piece; FIG. 2 is a flow chart of the shaft-disc-fork force transfer key thermoforming control method; fig. 3 is a finite element model diagram during the shaft-disc-fork force transfer key thermoforming control method.
In fig. 2, (a) is a forging diagram of step S2, (b) is a forging diagram of step S3, (c) is a forging diagram of step S4, (f) is a forging diagram of step S5, and (e) is a forging diagram of step S6.
In fig. 3, (a) is a forging processing diagram of step S2, (b) is a forging processing diagram of step S5, and (c) is a forging processing diagram of step S6.
The method for controlling the hot near forming of the shaft-disc-fork-shaped force transmission key piece comprises the following steps:
s1, preparing an original bar-shaped blank: cutting the rod-shaped blank into a pretreated blank with a certain size specification;
s2, upsetting blank making: upsetting the pretreated blank, specifically heating the pretreated blank to 130-180 ℃, smearing graphite solution on the surface of the pretreated blank, continuously heating to 1200 ℃, preserving heat for 90 minutes, and heating an upsetting die to 200-400 ℃; upsetting the head of the bar-shaped blank, wherein the bar part still keeps bar-shaped, the middle part of the flat anvil mould is designed into a circular arc-shaped protrusion, and the radius of the circular arc is R50-R200;
s3, rod part lengthening: the pre-treated blank after head upsetting is subjected to rod part drawing, the drawing pass is 4-10 times, and the pressing amount of each pass is 5-20 mm;
s4, local flattening: locally flattening the head of the blank with the rod part pulled out, wherein the pressing amount is 5-10 mm;
s5, pre-forging: and (3) performing hot die forging forming on the blank obtained after the step (S4) is completed by using a pre-forging die, wherein the temperature interval of an upper die and a lower die of the pre-forging die is 200-400 ℃, and the temperature interval of the blank is 800-1200 ℃. Pressing down to the upper die and the lower die of the pre-forging die at a certain speed to close to obtain a pre-forging piece, cutting off blank flash of the obtained pre-forging piece, avoiding the influence of flash metal on the final forging process, and preparing for final forging;
s6, final forging: and heating and preserving the heat of the pre-forging and the final forging die, wherein the temperature interval of an upper die and a lower die of the final forging die is 200-400 ℃, the temperature interval of a pre-forged blank is 800-1200 ℃, pressing down the pre-forging and the final forging die at a certain speed until the upper die and the lower die of the final forging die are closed, and performing alkali washing and flash removal on the obtained final forging to obtain a qualified forging.
In the above embodiment, the raw bar-shaped ingot is cut into cylindrical ingot of Φ100mm×165mm in step S1, and the surface scale is removed to obtain the pretreated ingot. The processing is convenient for the subsequent blank making process and forging forming.
As shown in fig. 4 and 5, fig. 4 is a schematic diagram of an upper die of the upsetting process; FIG. 5 is a schematic view of the lower die of the upsetting process; in the upsetting blank manufacturing process, an upper die and a lower die shown in fig. 2 and 3 are used for upsetting, and the pretreated blank is heated to 1200 ℃ and is kept for 90 minutes. The radius of the circular arc of the flat anvil mould is selected from R100 and R150. As a preferred embodiment. As shown in fig. 6, fig. 6 is a schematic view of the structure of the pre-processed blank after upsetting; the metal is pre-distributed to the blank during upsetting by means of the circular arc projection.
In the step S3, the rod part is pulled out for 6 to 8 passes in total, and the pressing amount of each pass is 5 to 20mm.
In the step S4 of locally flattening, the head part of the blank with the rod part drawn is locally flattened, the pressing amount of the die is 8mm, and the purpose is to facilitate the positioning of the blank in the subsequent pre-forging process and prepare for the pre-forging process.
In the step S5, the blank obtained through the blank making process is pre-forged by using a pre-forging die, the center of the symmetrical splitting table is horizontally translated by 4mm by using an asymmetrical splitting table, the upper die, the lower die and the blank are heated, the upper die and the lower die are heated to 300 ℃, the blank is heated to 1200 ℃, the pressing speed of the upper die is 30mm/S, and the tonnage is about 1250 tons until the upper die and the lower die are completely closed.
And S6, in the final forging process, alkali washing and repairing are carried out on the blank obtained by the pre-forging, blank flash is removed, the influence on metal flow in the final forging process is avoided, a final forging die is used for forging the pre-forging blank, the pre-forged blank and the final forging die are heated, an upper die and a lower die are heated to 300 ℃, the blank is heated to 1200 ℃, the upper die is pressed down at a certain speed until the dies are closed, the flash is removed from the obtained forging, and the qualified forging can be obtained. The pressing speed of the upper die is 30mm/s, and final forging is carried out, wherein the tonnage of final forging is about 1390 tons.
As shown in fig. 7, fig. 7 (a) is a final forging completion effect diagram after upsetting a flat anvil provided with a circular arc-shaped protrusion in the middle; FIG. 7 (b) is a diagram showing the effect of finish forging after upsetting a conventional flat anvil; as can be seen from fig. 7, the part surface is free of forming defects and the number of flash edges is reduced with an arcuate anvil upset compared to an arcuate anvil upset.
The invention designs the middle part of the upsetting flat anvil into a circular arc-shaped protuberance, and distributes metal in advance to blanks in the upsetting process. Compared with the traditional flat anvil, the problems of excessive flash and easy folding defect of the head of the pre-forging piece are effectively solved.
FIG. 8 is a graph showing a comparison of folding defects of pre-forgings with circular arc-shaped protrusions with different radiuses; FIG. 8 (a) is a diagram of a folding defect of a pre-forging after upsetting a conventional flat anvil; FIG. 8 (b) is a diagram showing a folding defect of a pre-forging piece after upsetting a flat anvil with an R100 arc-shaped protrusion in the middle; fig. 8 (c) is a diagram showing a folding defect of the pre-forging after upsetting the flat anvil with the circular arc-shaped protrusion of R150 in the middle.
When the flat anvil die is used for upsetting, more folding occurs on the head flash, when the upper die with the circular arc-shaped protrusions is used for upsetting, folding defects are reduced, only a small amount of folding occurs on the edge of the head flash, and the fact that the circular arc-shaped protrusions of the upper die have an obvious shunting effect on the metal of the head of the forging piece is explained, so that the formation of the head folding defects is effectively reduced, and the forming quality is improved.
When upsetting is performed using a flat anvil die, the forming load is approximately 1520 tons, when upsetting is performed using an upper die having circular arc-shaped protrusions, the forming load is approximately 1250 tons when the radius of the circular arc is R100, and the forming load is approximately 1380 tons when the radius of the circular arc is R150. Upsetting by using an upper die with circular arc-shaped protrusions can effectively reduce forming load.
As shown in fig. 9, 10 and 11, fig. 9 is a plastic strain distribution diagram of the shaft-disc-fork force transmission key member prepared by the invention, fig. 10 is an effective stress distribution diagram of the shaft-disc-fork force transmission key member prepared by the invention, and fig. 11 is a temperature distribution diagram of the shaft-disc-fork force transmission key member prepared by the invention.
As can be seen from fig. 9, the overall strain of the part is relatively uniform, the metal flows vigorously in the middle of the two fork parts, the strain is relatively large, and then the metal converges in the transition area of the flange and the rod part, and the strain is relatively large. As can be seen from fig. 10, the two-fork structure is complex, and has more fillets and boss structures, so that local stress is larger at the fillets of the fork in the forming process, and metal flows smoothly at the flat surfaces of the fork, so that the deformation is more uniform and the stress is smaller. As can be seen from fig. 11, the overall temperature of the part is lower than the temperature of the starting forging stock, the local temperature is higher at the position where the metal flows severely at the fork part and the flange, the metal is more accumulated at the flash, and the temperature is increased. Therefore, the invention accurately controls the metal flow direction and improves the local defect by controlling the forming temperature and the forming speed, and solves the problems that the rod part is difficult to form, and the fork part and the flange part are easy to have folding defects and streamline turbulence.
The invention is an effective method for forming difficult because of the complex structure and high performance requirement of the fork-shaped force transmission key piece and the easy formation of folding defects at a plurality of positions in the forming process. The forked force transmission key piece formed by the method has high dimensional accuracy, good mechanical property, no forming defect and streamline turbulence phenomenon, and all properties meet the design requirements.
Example 1
S1, preparing an original bar-shaped blank: cutting the blank into bars with phi of 100mm multiplied by 165mm, and further processing to remove oxide skin on the surface of the blank;
s2, upsetting blank making: and (3) heating bars with phi of 100mm multiplied by 165mm to 1200 ℃, keeping the temperature for 90 minutes, heating an upper die and a lower die to 300 ℃, wherein the upper die adopts a flat anvil die with the arc radius of the middle part of R100, and upsetting to the shape shown in figure 4.
S3, rod part lengthening: and (3) rod part drawing is carried out on the upsetted blank, the blank is rotated for 90 degrees after each pass of drawing is completed, the total drawing is carried out for 6 passes, the two-pass pressing amount is 20mm, the three-five-pass pressing amount is 10mm, and the four-six-pass pressing amount is 5mm.
S4, local flattening: and (3) carrying out partial flattening on the head of the blank with the rod part pulled out, wherein the pressing amount of the die is 8mm.
S5, pre-forging: the blank is forged by using a pre-forging die, the blank after a plurality of blank making processes is heated to 1200 ℃, the pre-forging upper die and the pre-forging lower die are heated to 300 ℃, and the upper die is pressed down at a speed of 30mm/s until the upper die and the lower die are closed.
S6, final forging: cutting off redundant flash to avoid the influence of redundant flash to the final forging process, heating and preserving heat to the pre-forging and the final forging die, heating the upper die and the lower die to 300 ℃, heating the blank to 1200 ℃, pressing the final forging upper die to the die to be closed at the speed of 30tm/s, and performing alkali washing and flash removal to the obtained final forging, thereby obtaining the qualified forging which is complete in forming and free of quality defects.
Example two
S1, preparing an original bar-shaped blank: cutting the blank into bars with phi of 100mm multiplied by 165mm, and further processing to remove oxide skin on the surface of the blank;
s2, upsetting blank making: and (3) heating bars with phi of 100mm multiplied by 165mm to 1100 ℃, keeping the temperature for 90 minutes, heating an upper die and a lower die to 300 ℃, wherein the upper die adopts a flat anvil die with the arc radius of the middle part of R150, and upsetting to the shape shown in figure 4.
S3, rod part lengthening: and (3) rod part drawing is carried out on the upsetted blank, the blank is rotated for 90 degrees after each pass of drawing is completed, the total drawing is carried out for 6 passes, the two-pass pressing amount is 20mm, the three-five-pass pressing amount is 10mm, and the four-six-pass pressing amount is 5mm.
S4, local flattening: and (3) carrying out partial flattening on the head of the blank with the rod part pulled out, wherein the pressing amount of the die is 8mm.
S5, pre-forging: the blank is forged by using a pre-forging die, the blank after a plurality of blank making processes is heated to 1100 ℃, the pre-forging upper die and the pre-forging lower die are heated to 300 ℃, and the upper die is pressed down at a speed of 30mm/s until the upper die and the lower die are closed.
S6, final forging: cutting off redundant flash to avoid the influence of redundant flash to the final forging process, heating and preserving heat to the pre-forging and the final forging die, heating the upper die and the lower die to 300 ℃, heating the blank to 1100 ℃, pressing the final forging upper die down to the die to be closed at the speed of 30mm/s, and performing alkali washing and flash removal to the obtained final forging, thereby obtaining the qualified forging which is complete in forming and free of quality defects.
The forging pieces obtained in the first embodiment and the second embodiment have higher forming quality and forming precision, have no forming defects, have no streamline turbulence phenomenon on the surface of the forging piece, and meet the requirements.
The foregoing description of the preferred embodiment of the invention is merely illustrative of the invention and is not intended to be limiting. It will be appreciated by persons skilled in the art that many variations, modifications, and even equivalents may be made thereto without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A method for controlling the thermal proximal forming of a shaft-disc-fork-shaped force transmission key piece, which is characterized by comprising the following steps:
s1, preparing a pretreated blank;
s2, upsetting the head of the pretreated blank;
s3, drawing out the rod part of the pretreated blank;
s4, locally flattening the head of the pretreated blank;
s5, pre-forging;
s6, final forging;
in step S2, the upsetting die upper die is a flat anvil with a circular arc-shaped protrusion in the middle, and the circular arc radius of the circular arc-shaped protrusion is R100.
2. The method for controlling the thermal proximity of a shaft-disc-fork force transmission key according to claim 1, characterized in that in step S1, a bar-shaped blank is cut into a cylindrical blank and surface scale is removed, resulting in the pretreated blank.
3. The method for controlling the thermal approaching forming of the shaft-disc-fork force transmission key piece according to claim 1, wherein in the step S2, the pretreated blank is heated to 130-180 ℃, the graphite solution is smeared on the surface of the pretreated blank, the heating is continued to 1200 ℃, the temperature is kept for 90 minutes, the upsetting die is heated to 200-400 ℃, the head of the pretreated blank is upset, and the rod-shaped part of the pretreated blank is kept in a rod shape.
4. The method for controlling the thermal approaching forming of the shaft-disc-fork-shaped force transmission key piece according to claim 1, wherein in the step S3, the rod part is drawn out for 4-10 times, and the pressing amount of each time is 5-20 mm.
5. The method for controlling the thermal proximal forming of a shaft-disc-fork-shaped force transmission key member according to claim 1, wherein in step S4, the head is locally flattened, and the pressing amount is 5 mm-10 mm.
6. The control method for hot near forming of shaft-disc-fork force transmission key parts according to claim 1, wherein in step S5, the blank obtained after step S4 is hot-forged by a pre-forging die, wherein the upper die and the lower die of the pre-forging die have a temperature interval of 200 ℃ to 400 ℃ and the blank has a temperature interval of 800 ℃ to 1200 ℃.
7. The method for controlling the hot near forming of the shaft-disc-fork force transmission key piece according to claim 1, wherein in the step S6, a pre-forging piece and a final forging die are heated and kept at the temperature of 200-400 ℃ in the upper die and the lower die of the final forging die, and the temperature of a pre-forged blank is 800-1200 ℃.
8. The method for controlling the hot near forming of a shaft-disc-fork force transmission key according to claim 6, wherein in step S5, the upper die pressing speed of the pre-forging die is 30mm/S until the upper and lower dies of the pre-forging die are completely closed, and the tonnage of pre-forging is 1250 tons.
9. The method for controlling the hot near forming of a shaft-disc-fork force transmission key according to claim 7, wherein in step S6, the upper die pressing down speed of the final forging die is 30mm/S for final forging, and the tonnage of the final forging is 1390 tons.
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| CN116460240B (en) * | 2023-03-30 | 2023-12-12 | 日照市七星汽车部件股份有限公司 | Upsetting and material-dividing integrated die and forging method of automobile steering knuckle |
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| CN102489659A (en) * | 2011-11-16 | 2012-06-13 | 日照市七星汽车部件有限公司 | Method for forging steering knuckle |
| CN102672096A (en) * | 2012-05-30 | 2012-09-19 | 重庆理工大学 | Precision die forging and shaping technical method for automobile steering knuckle rough type parts |
| CN103121075A (en) * | 2013-03-07 | 2013-05-29 | 上海交通大学 | Hot forging method for transmission shaft yoke with horizontal yoke part |
| CN105880445A (en) * | 2014-09-26 | 2016-08-24 | 重庆凯恩机械制造股份有限公司 | A no-flash forging method for a Steyr steering knuckle using an electric screw press |
| CN106239069A (en) * | 2016-08-24 | 2016-12-21 | 江苏金源高端装备股份有限公司 | A kind of automobile middle shaft Forging Technology |
| JP2018089658A (en) * | 2016-12-02 | 2018-06-14 | トヨタ自動車株式会社 | Steering knuckle forging preliminary molding method |
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| CN113399609A (en) | 2021-09-17 |
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