Vertical multi-station pre-forming die for automobile half axle

Abstract

The utility model discloses a vertical multi-station preforming die for an automobile half axle, which comprises an upper die part and a lower die part, the upper die part comprises a first upper die block, a second upper die block and a third upper die block, the first upper die block, the second upper die block and the third upper die block are linearly arranged along the sliding direction of the upper die block, and the lower die part comprises a lower die. The lower die is fixedly arranged on the workbench through a lower die plate, the first upper die block, the second upper die block and the third upper die block are each provided with a forming cavity, the lower die is provided with a containing cavity, the forming cavities can correspond to the containing cavities respectively, and the upper ends of bars placed in the containing cavities correspond to the forming cavities. According to the utility model, a die and die frame system with a single lower die and a plurality of upper dies is designed, the upper dies only need to be moved for a certain step pitch before each time of pressing, so that forging forming of different stations can be realized, and compared with other processing modes in the prior art, the device investment is less, the material utilization rate is high, the processing cost is low, and the processing efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts production, in particular to a vertical multi-station preforming die for an automobile semi-axle. Background Art

[0002] The half shaft of a commercial vehicle is the drive shaft in the drive axle unit that connects the wheels and the driven gear of the main reducer to achieve wheel drive and differential turning. It usually has an external spline at one end and a flange at the other end. The flange is connected to the wheel hub by bolts, and the external spline engages with the internal spline of the driven gear of the main reducer.

[0003] The flange at the upper end of the existing half-axle structure is a relatively complex rotating body structure, and the overall processing method of the half-axle is relatively complicated. The existing forming method of processing the flange on the shaft is generally through multi-station forming of a flat forging machine and swing rolling after blanking. Blanking is generally made by heating and gathering materials with an electric upsetting machine or wedge-cross rolling. Equipment such as flat forging machines and electric upsetting machines are expensive and costly. Wedge-cross rolling blanks require a large amount of excess material to be reserved at both ends before processing for subsequent processing, resulting in low material utilization and low processing efficiency.

[0004] In view of the above-mentioned defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the above-mentioned technical defects, the technical solution adopted by the utility model is to provide a vertical multi-station pre-forming mold for an automobile half-axle, including an upper mold part and a lower mold part, the upper mold part includes a first upper module, a second upper module and a third upper module, the first upper module, the second upper module and the third upper module are all fixedly arranged on the upper template, the upper template is slidably arranged on a sliding assembly, the first upper module, the second upper module and the third upper module are arranged in a straight line along the sliding direction of the upper module, the lower mold part includes a lower mold, the lower mold is fixedly arranged on a workbench through the lower mold, the first upper module, the second upper module and the third upper module are all provided with a forming cavity, the lower mold is provided with a placing cavity, each of the forming cavities can be respectively arranged corresponding to the placing cavity, and the upper end of the bar placed in the placing cavity is arranged corresponding to the forming cavity.

[0006] Preferably, the sliding assembly includes a slide plate, a slide and a fixed plate, the upper template is fixedly arranged on the slide plate, the slide plate is slidably connected to the slide plate, the slide plate can slide linearly along the slide plate, the slide plate is fixedly arranged on the fixed plate, and the fixed plate is connected to the pressing block of the press.

[0007] Preferably, the forming cavities are all configured as cylindrical cone-shaped structures, and the diameter of the upper end of the forming cavity is smaller than the diameter of the lower end of the forming cavity.

[0008] Preferably, the depths of the forming cavities of the first upper module, the second upper module and the third upper module decrease successively, and the maximum cross-sectional diameters of the forming cavities of the first upper module, the second upper module and the third upper module increase successively.

[0009] Preferably, the lower end surfaces of the first upper module, the second upper module and the third upper module are at the same height.

[0010] Preferably, the lower mold includes a lower mold barrel, a first lower module and a second lower module, the first lower module and the second lower module are arranged in sequence from top to bottom in the lower mold barrel, the first lower module and the second lower module are fixed on the lower template through the lower mold barrel, the placement cavity includes a forming section and a fixing section, the forming section is arranged at the upper part of the first lower module, the fixing section is arranged on the second lower module, the fixing section is arranged to be cylindrical, and the cross-sectional diameter of the fixing section is consistent with the cross-sectional diameter of the bar.

[0011] Preferably, the lower template is provided with a blanking hole corresponding to the placement cavity, and the diameter of the blanking hole is larger than the cross-sectional diameter of the fixed section.

[0012] Preferably, the lower mold part also includes a barrel, and the barrel is fixedly arranged on the workbench. A discharge hole is vertically arranged in the barrel, and the discharge hole is arranged corresponding to the placement cavity. The diameter of the discharge hole is larger than the cross-sectional diameter of the fixed section.

[0013] Preferably, a top material hole is provided at the bottom of the discharge hole, a top material hole is provided with a top rod, and the top rod can move vertically.

[0014] Preferably, a limiting block is provided at the upper end of the ejector rod, a limiting cavity is provided at the upper end of the ejector hole, the diameter of the limiting cavity is smaller than the diameter of the discharge hole, and the diameter of the limiting block is larger than the diameter of the ejector hole and smaller than the diameter of the limiting cavity.

[0015] Compared with the prior art, the beneficial effect of the utility model is that: the utility model adopts a vertical multi-station forming process, using conventional forging equipment hydraulic press and electric screw press to realize the forging of commercial vehicle half-axles. In order to realize this forming process, the utility model designs a mold frame system with a single lower mold and multiple upper molds. Before each pressing, only the upper mold needs to be moved a certain step distance to realize the forging forming at different stations. Compared with other processing methods in the prior art, the equipment investment is small, the material utilization rate is high, the processing cost is low and the processing efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural view of the automobile half shaft;

[0017] Figure 2 This is a structural view of the vertical multi-station preforming mold for the automobile half-axle;

[0018] Figure 3 This is a schematic diagram of the structure before processing;

[0019] Figure 4 This is a schematic diagram of the structure of the first upper module during processing;

[0020] Figure 5 This is a schematic diagram of the structure of the second upper module during processing;

[0021] Figure 6 This is a schematic diagram of the structure during processing of the third upper module.

[0022] The numbers in the figure represent:

[0023] 1-automobile half shaft; 2-upper mold part; 3-lower mold part; 11-spline part; 12-flange part; 21-first upper module; 22-second upper module; 23-third upper module; 24-upper template; 25-sliding assembly; 31-lower mold; 32-lower template; 33-workbench; 34-barrel; 35-elevator; 211-forming cavity; 251-slide plate; 252-slide table; 253-fixed plate; 311-placing cavity; 312-lower mold barrel; 313-first lower module; 314-second lower module; 315-forming protrusion; 321-dropping hole; 341-discharging hole; 342-elevating hole; 351-limiting block. DETAILED DESCRIPTION

[0024] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0025] Embodiment 1

[0026] like Figure 1 As shown, Figure 1 The vertical multi-station preforming die for the automobile half-axle of the utility model is used for processing the automobile half-axle, and the two ends of the automobile half-axle 1 are respectively provided with a spline part 11 and a flange part 12.

[0027] like Figure 2 As shown, Figure 2The structural view of the vertical multi-station preforming mold for the semi-axle of the automobile. The vertical multi-station preforming mold for the semi-axle of the automobile of the utility model comprises an upper mold part 2 and a lower mold part 3, wherein the upper mold part 2 comprises a first upper module 21, a second upper module 22 and a third upper module 23, wherein the first upper module 21, the second upper module 22 and the third upper module 23 are all fixedly arranged on an upper template 24, wherein the upper template 24 is slidably arranged on a sliding assembly 25, wherein the first upper module 21, the second upper module 22 and the third upper module 23 are arranged in a straight line along the sliding direction of the upper module, wherein the lower mold part 3 comprises a lower mold 31, wherein the lower mold 31 is fixedly arranged on a workbench 33 through the lower mold 32, wherein the first upper module 21, the second upper module 22 and the third upper module 23 are all provided with a forming cavity 211, wherein the lower mold 31 is provided with a placement cavity 311, wherein each of the forming cavities 211 can be respectively arranged corresponding to the placement cavity 311, and the upper end of the bar material placed in the placement cavity 311 is arranged corresponding to the forming cavity 211.

[0028] like Figures 3 to 6 As shown, Figure 3 This is a schematic diagram of the structure before processing; Figure 4 This is a schematic diagram of the structure of the first upper module during processing; Figure 5 This is a schematic diagram of the structure of the second upper module during processing; Figure 6 This is a schematic diagram of the structure during processing of the third upper module.

[0029] The sliding assembly 25 includes a slide plate 251, a slide table 252 and a fixed plate 253. The upper mold plate 24 is fixedly arranged on the slide plate 251. The slide plate 251 is slidably connected to the slide table 252. The slide plate 251 can slide linearly along the slide table 252. The slide table 252 is fixedly arranged on the fixed plate 253. The fixed plate 253 is connected to the pressing block of the press. The press is used to apply pressure to realize the pressing operation of the upper mold part 2 to the lower mold part 3, thereby realizing the top upsetting operation of the forming cavity 211 on the upper end of the bar material.

[0030] The upper mold part 2 is provided with a plurality of workstations. Under the control and drive of the hydraulic or electric control system of the press, the first upper mold block 21, the second upper mold block 22 and the third upper mold block 23 are moved forward and backward by a preset distance so that the upper mold of each workstation is aligned with the lower mold 31.

[0031] The utility model adopts a vertical multi-station forming process, and utilizes conventional forging equipment hydraulic press and electric screw press to realize the forging of commercial vehicle half-axles. To realize this forming process, the utility model designs a mold frame system with a single lower mold and multiple upper molds. Before each pressing, it is only necessary to move the upper mold by a certain step distance to realize forging forming at different stations. Compared with other processing methods in the prior art, the equipment investment is small, the material utilization rate is high, the processing cost is low and the processing efficiency is high.

[0032] Generally, the forming cavity 211 is configured as a cylindrical structure, and the upper end diameter of the forming cavity 211 is smaller than the lower end diameter of the forming cavity 211, so as to achieve the top upsetting operation of the upper end of the bar material. The lower end of the forming cavity 211 and the lower end surfaces of the first upper module 21, the second upper module 22 and the third upper module 23 are connected by an arc transition.

[0033] Preferably, the depths of the forming cavities 211 of the first upper module 21, the second upper module 22 and the third upper module 23 decrease successively, and the maximum cross-sectional diameters of the forming cavities 211 of the first upper module 21, the second upper module 22 and the third upper module 23 increase successively, thereby gradually forming a pre-forged billet of a desired shape and size through the first upper module 21, the second upper module 22 and the third upper module 23 successively.

[0034] Generally, the lower end surfaces of the first upper module 21, the second upper module 22 and the third upper module 23 are at the same height, so as to ensure that when the first upper module 21, the second upper module 22 and the third upper module 23 are clamping the lower die 31, the downward stroke of the upper die part 2 driven by the press is consistent, which is more convenient for continuous processing. The first upper module 21, the second upper module 22 and the third upper module 23 are all provided with an upper die seat, and the upper die seat and the corresponding upper die are designed as an assembly. The upper die seat of each station is made into a stepped height. By adjusting the height of the upper die of each station, the goal of ensuring the consistency of the height of the upper die seat and the upper die assembly is achieved.

[0035] Embodiment 2

[0036] The lower mold 31 includes a lower mold barrel 312, a first lower module 313 and a second lower module 314, the first lower module 313 and the second lower module 314 are arranged in sequence from top to bottom in the lower mold barrel 312, the first lower module 313 and the second lower module 314 are fixedly arranged on the lower template 32 through the lower mold barrel 312, the placement cavity 311 includes a forming section and a fixing section, the forming section is arranged on the upper part of the first lower module 313, the fixing section is arranged on the second lower module 314, and a forming protrusion 315 is also arranged on the upper surface of the first lower module 313, the shape structure of the forming section and the forming protrusion 315 corresponds to the end structure of the automobile half shaft 1, so as to form the flange portion 12 and the connecting portion of the automobile half shaft 1.

[0037] Generally, the forming section is configured as a cylindrical cone shape, so that the diameter of the automobile half-axle 1 gradually increases when the end portion extends toward the flange portion 12 to improve the connection strength between the flange portion 12 and the automobile half-axle 1, and the forming protrusion 315 is arranged on the upper edge of the placement cavity 311, and the forming protrusion 315 is configured as a circular ring structure with a circular arc cross-section, thereby forming an annular groove structure of the flange portion 12, which is used to reduce the contact between the flange and the mounting surface to facilitate debugging during installation.

[0038] The fixing section is configured to be cylindrical, and the cross-sectional diameter of the fixing section is consistent with the cross-sectional diameter of the bar material, thereby facilitating the fixing of the bar material in the lower die 31 .

[0039] The lower template 32 is provided with a blanking hole 321 corresponding to the placement cavity 311 , and the diameter of the blanking hole 321 is larger than the cross-sectional diameter of the fixed section, so that waste oxide scale etc. generated by processing can be more easily leaked downward from the blanking hole 321 .

[0040] The lower die part 3 further includes a barrel 34, which is fixedly arranged on the workbench 33. A discharge hole 341 is vertically arranged in the barrel 34. The discharge hole 341 is arranged corresponding to the placement cavity 311. The diameter of the discharge hole 341 is larger than the cross-sectional diameter of the fixed section. The barrel 34 can be arranged to facilitate the placement of long-sized bars in the lower die part 3. The fixed section can ensure that the state of the bars in the lower die part 3 is stable. The size design of the discharge hole 341 is more convenient for placing long-sized bars in the lower die part 3. The lower die part 3 is provided with the barrel 34 for placing the bars, which can withstand the forming force during the top upsetting of the materials.

[0041] Preferably, a ejection hole 342 is provided at the bottom of the discharge hole 341, and a ejection rod 35 is provided in the ejection hole 342. The ejection rod 35 can move vertically, and the rod in the discharge hole 341 can be ejected by the ejection operation of the ejection rod 35, so as to facilitate the removal of the processed rod.

[0042] Generally, a limiting block 351 is provided at the upper end of the push rod 35, and a limiting cavity is provided at the upper end of the push hole 342. The diameter of the limiting cavity is smaller than the diameter of the discharge hole 341. The diameter of the limiting block 351 is larger than the diameter of the push hole 342 and smaller than the diameter of the limiting cavity. When the rod is normally placed in the discharge hole 341, the limiting block 351 is arranged in the limiting cavity to avoid the influence of the limiting block 351 on the bottom of the rod, thereby ensuring that the rod is stably placed in the discharge hole 341.

[0043] The utility model provides a vertical multi-station top upsetting die frame structure, the key is that the upper die of each station can be moved to a specified position according to a preset program, and at the same time the barrel 34 is pre-buried in the workbench 33, and the space below the press workbench 33 is utilized to realize the vertical forging of 1.5-meter-long rods.

[0044] Embodiment 3

[0045] The main operating steps of the vertical multi-station preforming mold for automobile half-axles of the utility model are:

[0046] Mold transfer and preparation for loading and unloading: the upper mold part 2 is moved up to the loading and unloading position to prepare for robot loading;

[0047] Cleaning oxide scale: Use compressed air to clean the oxide scale on the mold surface and inside the barrel 34 to keep the mold free of foreign matter;

[0048] Spray lubricant: Use a spray gun to evenly spray lubrication on the upper and lower mold cavities;

[0049] Local induction heating: Use medium frequency furnace to carry out local induction heating on the part to be formed. The heating length range is determined according to the material volume of 12 parts of the flange part, generally 350mm~500mm, and the heating temperature is 1200℃±30℃;

[0050] Loading: The robot grabs the locally heated bar material and places it in the lower die part 3, and the bottom of the barrel 34 receives the bar material;

[0051] Primary upsetting die transfer forming: the upper die part 2 is pushed to the primary upsetting station, so that the first upper die block 21 is aligned with the lower die part 3, and the upper die part 2 moves downward to upset the bar material in the first upper die block 21. After the forming is completed, the upper die part 2 moves upward to a preset position;

[0052] Intermediate upsetting die transfer forming: the upper die part 2 is pushed to the intermediate upsetting station, so that the second upper die block 22 is aligned with the lower die part 3, and the upper die part 2 moves downward to upset the bar material in the second upper die block 22. After the forming is completed, the upper die part 2 moves upward to a preset position;

[0053] Final upsetting and die-shifting forming: the upper die part 2 is pushed to the final upsetting station, so that the third upper die block 23 is aligned with the lower die part 3, and the upper die part 2 moves downward to upset the bar material in the third upper die block 23. After the forming is completed, the upper die part 2 moves upward to a preset position;

[0054] Unloading: The upper die part 2 moves to the loading and unloading position, and the ejector rod 35 pushes the workpiece to the unloading position, where it is grabbed and removed by the robot.

[0055] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. A vertical multi-station preforming mold for an automobile half-axle, characterized in that: The invention comprises an upper die part and a lower die part, wherein the upper die part comprises a first upper module, a second upper module and a third upper module, wherein the first upper module, the second upper module and the third upper module are all fixedly arranged on the upper template, and the upper template is slidably arranged on a sliding assembly, and the first upper module, the second upper module and the third upper module are arranged in a straight line along the sliding direction of the upper module, and the lower die part comprises a lower die, and the lower die is fixedly arranged on a workbench through the lower template, and the first upper module, the second upper module and the third upper module are all provided with a forming cavity, and the lower die is provided with a placing cavity, and each of the forming cavities can be respectively arranged corresponding to the placing cavity, and the upper end of the bar placed in the placing cavity is arranged corresponding to the forming cavity.

2. The vertical multi-station preforming mold for an automobile half-axle according to claim 1, characterized in that: The sliding assembly includes a slide plate, a slide table and a fixed plate. The upper template is fixedly arranged on the slide plate. The slide plate is slidably connected to the slide table. The slide plate can slide linearly along the slide table. The slide table is fixedly arranged on the fixed plate. The fixed plate is connected to the pressing block of the press.

3. The vertical multi-station preforming mold for an automobile half-axle according to claim 1, characterized in that: The forming cavities are all configured as cylindrical table structures, and the diameter of the upper end of the forming cavity is smaller than the diameter of the lower end of the forming cavity.

4. The vertical multi-station preforming mold for an automobile half-axle as claimed in claim 3, characterized in that: The depths of the forming cavities of the first upper module, the second upper module and the third upper module decrease sequentially, and the maximum cross-sectional diameters of the forming cavities of the first upper module, the second upper module and the third upper module increase sequentially.

5. The vertical multi-station preforming mold for an automobile half-axle according to claim 4, characterized in that: The lower end surfaces of the first upper module, the second upper module and the third upper module are at the same height.

6. The vertical multi-station preforming mold for an automobile half-axle according to claim 1, characterized in that: The lower mold includes a lower mold barrel, a first lower module and a second lower module, the first lower module and the second lower module are arranged in sequence from top to bottom in the lower mold barrel, the first lower module and the second lower module are fixed on the lower template through the lower mold barrel, the placement cavity includes a forming section and a fixing section, the forming section is arranged at the upper part of the first lower module, the fixing section is arranged on the second lower module, the fixing section is arranged to be cylindrical, and the cross-sectional diameter of the fixing section is consistent with the cross-sectional diameter of the bar material.

7. The vertical multi-station preforming die for an automobile half-axle according to claim 6, characterized in that: The lower template is provided with a blanking hole corresponding to the placement cavity, and the diameter of the blanking hole is larger than the cross-sectional diameter of the fixed section.

8. The vertical multi-station preforming die for an automobile half-axle according to claim 6, characterized in that: The lower mold part also includes a barrel, which is fixedly arranged on the workbench. A discharge hole is vertically arranged in the barrel, and the discharge hole is arranged corresponding to the placement cavity. The diameter of the discharge hole is larger than the cross-sectional diameter of the fixed section.

9. The vertical multi-station preforming die for an automobile half-axle according to claim 8, characterized in that: A material ejection hole is arranged at the bottom of the material discharge hole, a ejection rod is arranged in the material ejection hole, and the ejection rod can move vertically.

10. The vertical multi-station preforming die for an automobile half-axle according to claim 9, characterized in that: A limiting block is arranged at the upper end of the ejector rod, a limiting cavity is arranged at the upper end of the ejector hole, the diameter of the limiting cavity is smaller than the diameter of the discharge hole, the diameter of the limiting block is larger than the diameter of the ejector hole and smaller than the diameter of the limiting cavity.

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