Differential case blank forging forming die

Abstract

The invention relates to the technical field of forging forming dies, in particular to a differential case blank forging forming die which comprises a working platform, a die shell is fixedly mounted in the working platform, a die inner core is arranged above the die shell, and the die inner core is connected with the working platform through a lifting mechanism. A cavity is formed in the mold inner core, a rotatable cross rod is arranged in the cavity, stamping parts are installed at the two ends of the outer surface of the cross rod through sliding structures, stamping holes are formed in the outer surface of the mold inner core, and the stamping parts are connected with the mold inner core through a moving mechanism. The outer surface of the stamping part is fixedly sleeved with a polishing part. According to the differential case blank forging forming die, through the arrangement of the die inner core, under the cooperation of the cross rod and the stamping part, the die inner core can conduct stamping forming on a workpiece, the stamping part can conduct stamping on the side edge of the formed workpiece, and the differential case forging cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forging forming die, in particular to a differential housing blank forging forming die. BACKGROUND

[0002] The differential housing is one of the important components of the differential, which is a kind of approximate rotary shell. The smaller end of the differential housing is a cylindrical end, and the other end is a bowl-shaped large disc. The large disc is used to support the main parts of the differential. The bottom of the large disc has a through hole along the axis of the cylindrical end, which is used to pass through the transmission shaft.

[0003] When the differential housing is forged, the raw material is first heated to the forging temperature, then the blank making process is carried out, the material volume is preliminarily formed and reasonably distributed, the workpiece after blank making is put into the final forging die, and the complex curved surface and internal structure of the differential housing are formed by high pressure once, so as to meet the design requirements. After final forging, the flash is removed and punching is carried out.

[0004] The existing differential housing cannot directly punch the side edge during forging, and needs to punch the side edge of the differential housing through a punching device, which not only increases the cost of forging the differential housing, but also causes the differential housing to deform during punching, affecting the quality of the differential housing. SUMMARY

[0005] The purpose of the present application is to provide a differential housing blank forging forming die to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a differential housing blank forging forming die, comprising a workbench, a die shell is fixedly installed inside the workbench, the die shell is open upward, a die core is arranged above the die shell, the die core is connected with the workbench through a lifting mechanism, a cavity is formed in the inside of the die core, a punching mechanism is arranged below the die core, a rotatable cross rod is arranged in the inside of the cavity, the cross rod is connected with the die core through a mounting structure, a punching piece is mounted on the outer surface of the cross rod through a sliding structure at both ends, a punching hole is formed in the outer surface of the die core, the punching hole and the punching piece are slidingly connected, the punching piece is connected with the die core through a moving mechanism, and a grinding piece is fixedly sleeved on the outer surface of the punching piece.

[0007] Preferably, the mounting structure comprises a swivel ring, the swivel ring is rotatably sleeved on the outer surface of the cross rod, an installation plate is fixedly installed on the outer surface of the swivel ring, and the installation plate is fixedly connected with the die core.

[0008] Preferably, the sliding structure comprises a sliding groove and a sliding block, the sliding groove is arranged on the outer surface of the cross bar, the sliding block is slidingly installed in the sliding groove, and the sliding block and the stamping part are fixedly connected.

[0009] Preferably, the moving mechanism comprises a pressing plate, the pressing plate is connected with the lifting mechanism, the pressing plate is located above the cross bar, push plates are rotatably installed on the two sides of the pressing plate, a push block is rotatably installed at the end of the push plate away from the pressing plate, the push block is rotatably connected with the cross bar, and the push block is connected with the stamping part through a rotating structure.

[0010] Preferably, the rotating structure comprises a rotating seat, the rotating seat is fixedly installed on the side of the push block close to the stamping part, an active groove is arranged on the outer surface of the stamping part, and the active groove is rotatably connected with the rotating seat.

[0011] Preferably, the lifting mechanism comprises a fixing frame, the fixing frame is fixedly installed above the working platform, a motorized push rod is fixedly installed above the fixing frame, the output end of the motorized push rod penetrates through the mold shell and extends into the cavity, the output end of the motorized push rod is fixedly connected with the pressing plate, a supporting plate is fixedly installed on the outer surface of the mold inner core, guide grooves are arranged on the two sides of the fixing frame, and the guide grooves are slidingly connected with the supporting plate.

[0012] Preferably, a rack is fixedly installed below the pressing plate, a gear ring is fixedly sleeved on the outer surface of the cross bar, the gear ring is engaged with the rack, and a limiting mechanism is arranged below the rack.

[0013] Preferably, the limiting mechanism comprises a mounting block and a fixed plate, the mounting block is fixedly installed below the rack, the fixed plate is fixedly installed in the cavity, a groove is arranged in the side of the mounting block close to the fixed plate, a first spring is fixedly installed in the groove, a limiting block is fixedly installed at the end of the first spring close to the fixed plate, the limiting block is slidingly connected with the groove, a limiting hole is arranged in the fixed plate, and the limiting hole is insertedly and matchingly connected with the limiting block.

[0014] Preferably, the stamping mechanism comprises a through hole, the through hole is arranged below the mold inner core, a punch is slidingly penetrated in the through hole, the punch is connected with the limiting block through an adjusting structure, and a recess is arranged at the bottom of the mold shell.

[0015] Preferably, the adjusting structure comprises a stand column, the stand column is fixedly installed in the cavity, an adjusting block is slidingly sleeved on the outer surface of the stand column, the adjusting block is fixedly connected with the punch, the side of the adjusting block close to the limiting block is inclined, the adjusting block is in contact with the limiting block, a second spring is movably sleeved on the outer surface of the stand column, and the second spring is fixedly connected with the adjusting block.

[0016] Compared with the prior art, the present application has the beneficial effects of:

[0017] 1、By setting the mold core, the mold core can be used for stamping forming of the workpiece under the cooperation of the cross bar and the stamping part, and the stamping part can be used for stamping the side edge of the formed workpiece, so that the workpiece does not need to be punched by the stamping mechanism, which is beneficial to reduce the cost of differential gear housing forging, and the workpiece is not easy to deform during punching, which is beneficial to ensure the quality of the differential gear housing.

[0018] 2、By setting the rotatable cross bar, the cross bar can drive the stamping part to rotate when rotating, so that the stressed part is uniformly stressed, which is beneficial to improve the stamping efficiency, and under the cooperation of the grinding part, the inner wall of the punched hole can be ground to improve the stamping effect.

[0019] 3、By setting the punch, the punch first contacts the workpiece to extrude the workpiece, and under the cooperation of the adjusting block, the restriction of the pressing plate can be released, so that the workpiece can be punched by the pressing plate after forming, which avoids deformation of the workpiece during punching, and is beneficial to improve the punching efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the overall structure of the present application;

[0021] Figure 2 is a structural cross-sectional view of the present application;

[0022] Figure 3 is a cross-sectional view of the internal structure of the mold core of the present application;

[0023] Figure 4 is a cross-sectional view of part of the structure of the present application;

[0024] Figure 5 is a cross-sectional view of the limiting mechanism structure of the present application;

[0025] Figure 6 is a cross-sectional view of the local structure inside the mold core of the present application;

[0026] Figure 7 is a cross-sectional view of the local structure of the present application;

[0027] Figure 8 is an enlarged view of A of the present application. Figure 7

[0028] ​The components represented by the numbers in the drawings are listed as follows: 1, work platform; 2, fixing frame; 3, electric push rod; 4, die shell; 5, die inner core; 6, support plate; 7, guide groove; 8, cavity; 9, punch; 10, through hole; 11, recess; 12, cross rod; 13, rotating ring; 14, mounting plate; 15, stamping hole; 16, stamping piece; 17, polishing piece; 18, sliding groove; 19, sliding block; 20, push block; 21, movable slot; 22, rotating seat; 23, pressing plate; 24, push plate; 25, gear ring; 26, rack; 27, mounting block; 28, fixing plate; 29, limiting hole; 30, limiting block; 31, groove body; 32, No. 1 spring; 33, adjusting block; 34, stand column; 35, No. 2 spring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] Please refer to Figures 1-8 , a kind of differential shell blank forging forming die is shown in the drawing, including work platform 1, the inside of work platform 1 is fixedly installed with die shell 4, die shell 4 opens upwards, the top of die shell 4 is provided with die inner core 5, die inner core 5 is connected with work platform 1 by lifting mechanism, the inside of die inner core 5 is provided with cavity 8, the bottom of die inner core 5 is provided with stamping mechanism, the inside of cavity 8 is provided with rotatable cross rod 12, cross rod 12 is connected with die inner core 5 by mounting structure, the outer surface of cross rod 12 is slidably provided with stamping piece 16 at both ends, the outer surface of die inner core 5 is provided with stamping hole 15, stamping hole 15 and stamping piece 16 are slidably connected, stamping piece 16 is connected with die inner core 5 by moving mechanism, the outer surface of stamping piece 16 is fixedly provided with polishing piece 17.

[0031] The workpiece is placed in the inside of the mold shell 4, under the action of the workbench 1, the lifting mechanism drives the mold inner core 5 to lift above the workbench 1, when the mold inner core 5 moves downward, the workpiece in the inside of the mold shell 4 can be extruded, under the action of the cross bar 12, the moving mechanism drives the stamping part 16 to move from the inside of the cavity 8 to the outside of the mold inner core 5, at this time, the stamping part 16 moves in the stamping hole 15, the stamping part 16 can stamp the workpiece, because the cross bar 12 can rotate, and the cross bar 12 is connected with the stamping part 16 through the sliding structure, so the cross bar 12 can drive the stamping part 16 to rotate, so that the stamping part 16 can cut the workpiece when stamping, so that the stress of the stamped part is more uniform, which is beneficial to improve the stamping effect, and under the cooperation of the polishing part 17, the hole after stamping can be polished, which is beneficial to improve the stamping efficiency.

[0032] The mounting structure comprises a rotating ring 13, the rotating ring 13 is rotatably sleeved on the outer surface of the cross bar 12, the outer surface of the rotating ring 13 is fixedly installed with a mounting plate 14, and the mounting plate 14 is fixedly connected with the mold inner core 5.

[0033] Specifically, under the action of the mounting plate 14, the cross bar 12 can rotate in the inside of the rotating ring 13, which is beneficial to increase the stability of the cross bar 12 when rotating.

[0034] The sliding structure comprises a sliding groove 18 and a sliding block 19, the sliding groove 18 is opened in the outer surface of the cross bar 12, and the sliding block 19 is slidingly installed in the inside of the sliding groove 18 and is fixedly connected with the stamping part 16.

[0035] Specifically, when the stamping part 16 moves on the outer surface of the cross bar 12, the stamping part 16 drives the sliding block 19 to move synchronously, at this time, the sliding block 19 moves in the sliding groove 18, so that the stamping part 16 can only reciprocate along the length direction of the cross bar 12, and the cross bar 12 can drive the stamping part 16 to rotate synchronously when rotating.

[0036] The moving mechanism comprises a pressing plate 23, the pressing plate 23 is connected with the lifting mechanism, the pressing plate 23 is located above the cross bar 12, pushing plates 24 are rotatably installed on the two sides of the pressing plate 23, a pushing block 20 is rotatably installed at the end of the pushing plate 24 away from the pressing plate 23, the pushing block 20 is rotatably connected with the cross bar 12, and the pushing block 20 is connected with the stamping part 16 through the rotating structure.

[0037] The rotating structure comprises a rotating seat 22, the rotating seat 22 is fixedly installed on one side of the pushing block 20 close to the stamping part 16, an active groove 21 is opened in the outer surface of the stamping part 16, and the active groove 21 is rotatably connected with the rotating seat 22.

[0038] Under the action of the lifting mechanism, the pressing plate 23 can move up and down inside the cavity 8, when the pressing plate 23 moves downward, the pressing plate 23 drives the push plate 24 to rotate, the push plate 24 drives the push block 20 to move along the length direction of the cross rod 12 on the surface of the cross rod 12, at this time, the two groups of push blocks 20 are away from each other, under the cooperation of the rotating seat 22 and the movable groove 21, the push block 20 can drive the stamping part 16 to move synchronously, and meanwhile, the rotation of the stamping part 16 is not limited.

[0039] The lifting mechanism comprises a fixing frame 2 fixedly installed above the working platform 1, an electric push rod 3 fixedly installed above the fixing frame 2, the output end of the electric push rod 3 penetrating through the mold shell 4 and extending into the inside of the cavity 8, and the output end of the electric push rod 3 being fixedly connected with the pressing plate 23, a supporting plate 6 fixedly installed on the outer surface of the mold inner core 5, and guide grooves 7 opened on both sides of the fixing frame 2 and being in sliding connection with the supporting plate 6.

[0040] Specifically, under the action of the fixing frame 2, the electric push rod 3 is connected with an external power supply, the electric push rod 3 drives the pressing plate 23 to move downward, and simultaneously drives the mold inner core 5 to move downward, the mold inner core 5 drives the supporting plate 6 to move inside the guide groove 7, so that the mold inner core 5 is more stable during movement.

[0041] A gear rack 26 is fixedly installed below the pressing plate 23, a gear ring 25 is fixedly sleeved on the outer surface of the cross rod 12, the gear ring 25 is in engagement with the gear rack 26, and a limiting mechanism is arranged below the gear rack 26.

[0042] The pressing plate 23 can drive the gear rack 26 to move synchronously during movement, when the gear rack 26 moves downward, the gear rack 26 can drive the cross rod 12 to rotate through the gear ring 25 due to the engagement between the gear rack 26 and the gear ring 25.

[0043] The limiting mechanism comprises a mounting block 27 and a fixed plate 28, the mounting block 27 is fixedly installed below the gear rack 26, the fixed plate 28 is fixedly installed inside the cavity 8, a groove 31 is opened in the inside of the side of the mounting block 27 close to the fixed plate 28, a No. 1 spring 32 is fixedly installed inside the groove 31, a limiting block 30 is fixedly installed at the end of the No. 1 spring 32 close to the fixed plate 28, the limiting block 30 is in sliding connection with the groove 31, a limiting hole 29 is opened in the inside of the fixed plate 28, and the limiting hole 29 is in plug-in assembly cooperation with the limiting block 30.

[0044] In the initial state, the No. 1 spring 32 pushes the limiting block 30 out of the inside of the groove 31, so that the limiting block 30 can penetrate through the limiting hole 29, thereby fixing the mounting block 27 and the fixed plate 28 together, at this time, the gear rack 26 and the pressing plate 23 cannot move, the electric push rod 3 cannot drive the pressing plate 23 to move alone, and the electric push rod 3 can only drive the mold inner core 5 to move through the pressing plate 23.

[0045] The stamping mechanism comprises a through hole 10 arranged below the inner core 5 of the mold, a punch 9 slidingly penetrating the through hole 10, the punch 9 being connected through an adjusting structure and a limiting block 30, and a groove 11 arranged at the bottom of the mold shell 4.

[0046] The adjusting structure comprises a column 34 fixedly arranged in the cavity 8, an adjusting block 33 slidingly sleeved on the outer surface of the column 34, the adjusting block 33 being fixedly connected with the punch 9, the side upper end face of the adjusting block 33 close to the limiting block 30 being inclined, the adjusting block 33 being in contact with the limiting block 30, and a second spring 35 movably sleeved on the outer surface of the column 34, the second spring 35 being fixedly connected with the adjusting block 33.

[0047] Specifically, under the elastic force of the second spring 35, in the initial state, the punch 9 extends to the outside of the inner core 5 of the mold, when the inner core 5 of the mold moves downward, the punch 9 first contacts the workpiece, and when the punch 9 contacts the inner wall below the mold shell 4, the punch 9 stops moving, in this process, the workpiece at the bottom of the mold shell 4 can be extruded to the upper side, and under the action of the punch 9, the workpiece can be extruded into a hole, at this time, the inner core 5 of the mold continues to move downward, the punch 9 drives the adjusting block 33 to move upward on the outer surface of the column 34, at this time, the second spring 35 is deformed under stress, the inner core 5 of the mold can further extrude the workpiece, a part of the workpiece below the inner core 5 of the mold is extruded into the groove 11, so that the lower tubular part of the workpiece is extended, the adjusting block 33 contacts the limiting block 30 when moving, and pushes the limiting block 30 into the groove body 31, so that the limiting block 30 is separated from the limiting hole 29, thereby being able to contact the limit between the mounting block 27 and the fixed plate 28, at this time, the electric push rod 3 can drive the rack 26 to move through the pressing plate 23.

[0048] Working principle: in the initial state, the first spring 32 pushes the limiting block 30 out of the groove body 31, so that the limiting block 30 penetrates the limiting hole 29, thereby fixing the mounting block 27 and the fixed plate 28 together, at this time, the rack 26 and the pressing plate 23 cannot move, the electric push rod 3 cannot move the pressing plate 23 alone, and the electric push rod 3 can only move the inner core 5 of the mold through the pressing plate 23.

[0049] Under the action of the fixing frame 2, the electric push rod 3 is connected with the external power supply, the electric push rod 3 drives the pressing plate 23 to move downward, and at the same time, can drive the inner core 5 of the mold to move downward, the inner core 5 of the mold drives the supporting plate 6 to move in the guide groove 7, so that the inner core 5 of the mold is more stable when moving.

[0050] Under the elastic force of the second spring 35, the punch 9 extends to the outside of the die inner core 5 in the initial state, the workpiece is placed in the inside of the die shell 4, the die inner core 5 moves downward, the punch 9 first contacts the workpiece, when the punch 9 contacts the lower inner wall of the die shell 4, the punch 9 stops moving, in this process, the workpiece at the bottom of the die shell 4 can be extruded to the upper side, under the action of the punch 9, it can be extruded into a hole, at this time, the die inner core 5 continues to move downward, the punch 9 drives the adjusting block 33 to move upward on the outer surface of the column 34, at this time, the second spring 35 is deformed under stress, the die inner core 5 can further extrude the workpiece, part of the workpiece inside the die shell 4 is extruded to the inside of the groove 11, so that the lower tubular part of the workpiece is extended, the adjusting block 33 contacts the limiting block 30 when moving, and pushes the limiting block 30 to the inside of the groove 31, so that the limiting block 30 and the limiting hole 29 are separated, so as to contact the limit between the mounting block 27 and the fixed plate 28, at this time, the electric push rod 3 can drive the rack 26 to move through the pressing plate 23.

[0051] When the pressing plate 23 moves downward, the pressing plate 23 drives the push plate 24 to rotate, the push plate 24 drives the push block 20 to move along the length direction of the horizontal rod 12 on the surface of the horizontal rod 12, at this time, the two groups of push blocks 20 are away from each other, under the cooperation of the rotating seat 22 and the movable groove 21, the push block 20 can drive the stamping part 16 to move synchronously.

[0052] The pressing plate 23 can drive the rack 26 to move synchronously when moving, when the rack 26 moves downward, since the rack 26 and the gear ring 25 are engaged, the rack 26 can drive the horizontal rod 12 to rotate through the gear ring 25, under the action of the mounting plate 14, the horizontal rod 12 can rotate in the inside of the rotating ring 13, which is beneficial to increase the stability of the horizontal rod 12 when rotating.

[0053] When the stamping part 16 moves on the outer surface of the horizontal rod 12, the stamping part 16 drives the sliding block 19 to move synchronously, at this time, the sliding block 19 moves in the inside of the sliding groove 18, so that the stamping part 16 can only reciprocate along the length direction of the horizontal rod 12, the horizontal rod 12 can drive the stamping part 16 to rotate synchronously when rotating, under the cooperation of the polishing part 17, the polished hole can be polished.

[0054] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0055] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A differential case blank forging forming die comprising a work table (1), characterized in that: The inside of the working platform (1) is fixedly provided with a mold shell (4), the mold shell (4) is upwardly open, a mold inner core (5) is arranged above the mold shell (4), the mold inner core (5) is connected with the working platform (1) through a lifting mechanism, a cavity (8) is formed in the inside of the mold inner core (5), a stamping mechanism is arranged below the mold inner core (5), a rotatable cross rod (12) is arranged in the cavity (8), the cross rod (12) is connected with the mold inner core (5) through a mounting structure, stamping pieces (16) are arranged at both ends of the outer surface of the cross rod (12) through sliding structures, a stamping hole (15) is formed in the outer surface of the mold inner core (5), the stamping hole (15) and the stamping pieces (16) are in sliding connection, the stamping pieces (16) are connected with the mold inner core (5) through a moving mechanism, and grinding pieces (17) are fixedly arranged on the outer surface of the stamping pieces (16).

2. A differential case blank swage forming die according to claim 1, characterized in that: The mounting structure comprises a rotating ring (13), the rotating ring (13) is rotatably arranged on the outer surface of the cross rod (12), and an installation plate (14) is fixedly arranged on the outer surface of the rotating ring (13) and fixedly connected with the mold inner core (5).

3. A differential case blank swage forming die according to claim 1, characterized in that: The sliding structure comprises a sliding groove (18) and a sliding block (19), the sliding groove (18) is formed in the outer surface of the cross rod (12), and the sliding block (19) is slidingly arranged in the sliding groove (18) and fixedly connected with the stamping pieces (16).

4. The differential case blank swage forming die of claim 1, wherein: The moving mechanism comprises a pressing plate (23), the pressing plate (23) is connected with the lifting mechanism, the pressing plate (23) is arranged above the cross rod (12), push plates (24) are rotatably arranged at the two sides of the pressing plate (23), push blocks (20) are rotatably arranged at the ends, away from the pressing plate (23), of the push plates (24), the push blocks (20) are rotatably connected with the cross rod (12) and connected with the stamping pieces (16) through a rotating structure.

5. A differential case blank swage forming die according to claim 4, characterized in that: The rotating structure comprises a rotating seat (22), the rotating seat (22) is fixedly arranged on the side, close to the stamping pieces (16), of the push block (20), and an active groove (21) is formed in the outer surface of the stamping pieces (16) and rotatably connected with the rotating seat (22).

6. A differential case blank swage forming die according to claim 4 wherein: The lifting mechanism comprises a fixed frame (2), the fixed frame (2) is fixedly arranged above the working platform (1), an electric push rod (3) is fixedly arranged above the fixed frame (2), the output end of the electric push rod (3) penetrates through the mold shell (4) and extends into the cavity (8), the output end of the electric push rod (3) is fixedly connected with the pressing plate (23), a supporting plate (6) is fixedly arranged on the outer surface of the mold inner core (5), and guide grooves (7) are formed at the two sides of the fixed frame (2) and in sliding connection with the supporting plate (6).

7. A differential case blank swage forming die according to claim 4 wherein: The lower part of the pressing plate (23) is fixedly provided with a rack (26), the outer surface of the cross rod (12) is fixedly provided with a gear ring (25), the gear ring (25) and the rack (26) are engaged, and the lower part of the rack (26) is provided with a limiting mechanism.

8. A differential case blank swage forming die according to claim 7, characterized in that: The limiting mechanism comprises a mounting block (27) and a fixed plate (28), the mounting block (27) is fixedly installed below the rack (26), the fixed plate (28) is fixedly installed inside the cavity (8), a groove (31) is formed in the inner side of the mounting block (27) close to the fixed plate (28), a No. 1 spring (32) is fixedly installed inside the groove (31), a limiting block (30) is fixedly installed at one end of the No. 1 spring (32) close to the fixed plate (28), the limiting block (30) and the groove (31) are in sliding connection, and a limiting hole (29) is formed in the inner side of the fixed plate (28) and is in plug-in fit with the limiting block (30).

9. A differential case blank swage forming die according to claim 8, characterized in that: The punching mechanism comprises a through hole (10) formed below the inner core (5) of the mold, the punching pin (9) is slidably penetrated into the through hole (10), the punching pin (9) is connected with the limiting block (30) through the adjusting structure, and the bottom of the mold shell (4) is provided with a groove (11).

10. A differential case blank swage forming die according to claim 9, characterized in that: The adjusting structure comprises a stand column (34) fixedly installed inside the cavity (8), the outer surface of the stand column (34) is slidably provided with an adjusting block (33), the adjusting block (33) is fixedly connected with the punching pin (9), the upper end face of the side of the adjusting block (33) close to the limiting block (30) is inclined, the adjusting block (33) and the limiting block (30) are in contact fit, the outer surface of the stand column (34) is movably provided with a No. 2 spring (35), and the No. 2 spring (35) is fixedly connected with the adjusting block (33).

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