Axle housing forming die

Abstract

The utility model discloses an axle housing forming die which comprises a first die, a second die, a third die and a fourth die, a square blank sequentially passes through the four dies to be punched to form an axle housing shape, and the axle housing is integrally formed in the punching process. After being processed by the die, the axle housing is integrally formed by stamping and deforming a whole steel plate, so that tailor-welded parts of parts are reduced, enough high strength of the parts can be guaranteed, the welding process is simplified, the risk of oil leakage caused by welding defects is greatly reduced, and the problems that the number of welding points of an existing automobile axle housing is large, and the cost is low are effectively solved. And damage is easy to occur.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge housing production equipment, and particularly relates to a bridge housing forming die. Background Art

[0002] The traditional automobile drive bridge housing adopts a welded structure of upper and lower half shells, a cap shell, triangular plates, etc. Since this structure has a large number of welding points, it is difficult to avoid stress, deformation and welding defects of parts, and welding defects are likely to occur during later use, resulting in oil leakage. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a bridge housing forming die to solve the problems of many welding points and easy damage of the automobile bridge housing.

[0004] To solve the above problems, the utility model adopts the following technical solutions:

[0005] A bridge housing forming die includes a first die, which has a first female die and a first male die that are closed together to form a first die cavity. The first die cavity is adapted to the circular convex bulge in the middle upper part of the bridge housing;

[0006] A second die, which has a second female die and a second male die that are closed together to form a second die cavity. A first punch for trimming the blank and a second punch for punching the oil hole are arranged on the second male die. A blanking table adapted to the first punch is arranged on the second female die, and a blanking hole adapted to the second punch is arranged on the second female die;

[0007] A third die, which has a third female die and a third male die that are closed together to form a third die cavity. A punching groove adapted to the upper half of the bridge housing is arranged on the third female die, and a flanging protrusion adapted to the punching groove is arranged on the third male die;

[0008] A fourth die, which has a fourth female die and a fourth male die that are closed together to form a fourth die cavity. The fourth die cavity is adapted to the outer shape of the bridge housing.

[0009] Furthermore, a semi-circular deformation protrusion is arranged on the first male die. A stepped groove is arranged on the deformation protrusion, and a groove adapted to the shape of the deformation protrusion is arranged on the first female die.

[0010] Furthermore, a positioning punch for punching positioning holes at both ends of the blank is arranged on the second female die.

[0011] Furthermore, a blank stop is arranged around the blank on the first die.

[0012] Further, a forming block for vertically flanging both sides of the circular convex hull is provided in the middle of the fourth punch. A guiding slope is provided on the opposite side of the fourth die from the forming block. The guiding slope is used to bend the vertical flanges on both sides of the circular convex hull inward; arc-shaped grooves adapted to the long U-shaped blanks 16 at both ends of the circular convex hull are provided at both ends in the middle of the fourth punch 11; a V-shaped groove corresponding to the arc-shaped groove on the fourth punch 11 is provided on the fourth die 10.

[0013] Further, the trimming shape of the first punch is adapted to the unfolded shape of the part of the axle housing located below the circular convex hull.

[0014] Further, a positioning projection adapted to the circular convex hull on the axle housing is provided on the second die, and a positioning groove adapted to the positioning projection is provided on the second punch.

[0015] The remarkable beneficial effects achieved by the present utility model:

[0016] In this application, after being processed by the above-mentioned die, the entire axle housing is formed by stamping and deforming a whole steel plate, reducing the part welding joints. It can not only ensure that the parts have sufficient strength but also simplify the welding process, thus greatly reducing the risk of oil leakage caused by welding defects and effectively solving the problem of many welding points and easy damage in the current automobile axle housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 is a schematic cross-sectional view of the first die of the present invention;

[0018] Attached Figure 2 is a schematic cross-sectional view of the second die of the present invention;

[0019] Attached Figure 3 is a schematic bottom view of the second punch of the present invention;

[0020] Attached Figure 4 is a schematic first axonometric three-dimensional structure view of the third die of the present invention;

[0021] Attached Figure 5 is a schematic second axonometric three-dimensional structure view of the third die of the present invention;

[0022] Attached Figure 6 is a schematic first axonometric three-dimensional structure view of the fourth die of the present invention;

[0023] Attached Figure 7 is a schematic second axonometric three-dimensional structure view of the fourth die of the present invention.

[0024] In the attached drawings, 1 is the first female die; 2 is the first male die; 3 is the second female die; 4 is the second male die; 5 is the first punch; 6 is the second punch; 7 is the third female die; 8 is the third male die; 9 is the flanging bulge; 10 is the fourth female die; 11 is the fourth male die; 12 is the positioning punch; 13 is the blank stop; 14 is the forming block; 15 is the guiding slope; 16 is the blank; 17 is the positioning post; 18 is the floating pressure plate. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] Embodiment 1

[0027] As Figures 1 - 7 shown, the processing die for the integral rear axle housing of an automobile includes a first die, which has a first female die 1 and a first male die 2 that are closed together to form a first die cavity. The first die cavity is adapted to the circular convex bulge on the upper side of the middle part of the rear axle housing. By placing the blank 16 between the first female die 1 and the first male die 2 for stamping, a bulge adapted to the circular convex bulge on the upper side of the rear axle housing is formed on the plate-shaped square blank 16. A stepped groove is provided on the semi-circular deformation bulge on the first male die 2 to make the circular convex bulge after stamping adapted to the bulge on the rear part of the rear axle housing through the setting of the stepped groove. A groove adapted to the deformation bulge is provided on the first female die 1. The first die is used to punch out a circular convex bulge on the square blank 16 that is the same as the upper part of the rear axle housing;

[0028] The second die, which has a second female die 3 and a second male die 4 that close together to form a second die cavity. The second male die 4 is provided with a first punch 5 for trimming the blank shape and a second punch 6 for punching oil holes. The second female die 3 is provided with a blanking table adapted to the first punch 5 and a blanking hole adapted to the second punch 6. The second female die 3 is provided with a positioning protrusion adapted to the circular convex hull, and the second male die 4 is provided with a floating pressure plate 18. The floating pressure plate 18 is movably connected to the first punch 5 and is adapted to the shape of the lower side part of the circular convex hull in the bridge shell after unfolding. The floating pressure plate 18 is provided with a groove adapted to the positioning protrusion, and the second punch 6 is arranged on the floating pressure plate 18. When stamping the blank 16, the blank 16 is placed on the second female die 3, and the floating pressure plate 18 on the second male die 4 first contacts the blank 16. As the second male die 4 moves downward, the second female die 3 and the second male die 4 close, and the first punch 5 and the second punch 6 cut the blank 16. The cut blank 16 is adapted to the shape of the lower half of the bridge shell after unfolding, and at the same time, oil holes are punched on the circular convex hull of the blank 16.

[0029] The third die, which has a third female die 7 and a third male die 8 that close together to form a third die cavity. The third female die 7 is provided with a punching groove adapted to the upper part of the bridge shell, and the third male die 8 is provided with a flanging protrusion 9 adapted to the punching groove. The upper part of the flanging protrusion 9 is provided with an arc protrusion having the same radius as the tube body in the bridge shell. After stamping by the third die, the vertical flanging distance on both sides of the end of the circular convex hull is the same as the tube diameter, and the vertical flanging distance on both sides in the length direction of the circular convex hull is greater than the diameter of the circular convex hull. The setting of the third die is used to stamp the plate-shaped blank 16 with a circular convex hull into a long U-shaped blank 16, which is convenient for subsequent processing into a bridge shell.

[0030] The fourth die, which has a fourth female die 10 and a fourth male die 11 that close together to form a fourth die cavity. The middle part of the fourth male die 11 is provided with a forming block 14 for forming the vertical flanges on both sides of the circular convex hull. The opposite side of the fourth female die 10 and the forming block 14 is provided with a guiding slope 15, which is used to guide the vertical flanges on both sides of the circular convex hull to bend inward when the fourth female die 10 and the fourth male die 11 close. The two ends of the middle part of the fourth male die 11 are provided with arc grooves adapted to the long U-shaped blanks 16 at both ends of the circular convex hull. The fourth female die 10 is provided with V-shaped grooves corresponding to the arc grooves on the fourth male die 11, so as to close the openings of the long U-shaped blanks 16 at both ends of the circular convex hull, which is convenient for subsequent processing. It should be noted that after the blank 16 completes the vertical flanging, the blank 16 is placed into the fourth male die 11 with the circular convex hull facing down, and then the forming block 14 is placed on the upper side of the inner circular convex hull of the blank 16 to prevent additional deformation of the vertical flanges on both sides of the circular convex hull when the fourth die closes.

[0031] Combined with the above, after being processed by the above-mentioned die in the present application, the overall axle housing is formed by stamping and deforming a whole steel plate, reducing the part welding joint positions, which can not only ensure that the parts have sufficient strength but also simplify the welding process, thus greatly reducing the risk of oil leakage caused by welding defects and effectively solving the problem that there are many welding points on the current automobile axle housing and it is easy to be damaged.

[0032] It should be noted that the trimming shape of the first punch is adapted to the unfolded shape of the part under the circular convex hull in the axle housing, and the unfolded shape refers to the unfolding along the neutral line in the length direction of the axle housing.

[0033] Embodiment 2

[0034] As Figure 1 shown, in order to further facilitate the first die to stamp the blank 16, as another implementation manner, a blank stop 13 is provided on the first die around the blank 16, and the position of the blank 16 is limited by the setting of the blank stop 13 to prevent the blank 16 from shifting.

[0035] Embodiment 3

[0036] As Figure 3 shown, in order to facilitate the third die to vertically flanging the blank 16, a positioning punch 12 for punching positioning holes at both ends of the blank 16 is provided on the second female die 3. The trimmed blank 16 is positioned on the third die conveniently through the setting of the positioning holes, facilitating vertical flanging. Similarly, a positioning post 17 adapted to the positioning holes is provided on the third die to position the blank 16, facilitating vertical flanging.

[0037] (It should be noted that the positioning holes are semicircular. After the third die performs vertical flanging, the redundant blanks 16 on both sides of the positioning holes will be trimmed to make both ends of the blank 16 flat.)

[0038] Combined with the above embodiments, the processing technology of the axle housing includes the following steps:

[0039] S1: Stamping a square blank 16 with the first die, and punching out the circular convex hull on the upper part of the axle housing through the stamping of the first die;

[0040] S2: Using the second die to trim the square blank 16 into a shape adapted to the unfolded axle housing, and punching an oil hole on the circular convex hull. It should be noted that the so-called unfolding of the axle housing in this embodiment is the splitting and unfolding of the axle housing from the opposite side of the circular convex hull along the midline in the length direction. At this time, the width of the square blank 16 is equal to the width of the unfolded axle housing;

[0041] S3: Use the third die to press down both sides of the blank 16 in the length direction for vertical flanging, so that the cross-section of the entire blank 16 is U-shaped. The vertical flanging spacing on both sides of the circular convex hull is greater than the diameter of the circular convex hull, the vertical flanging spacing at both ends of the circular convex hull is less than the diameter of the circular convex hull, and the maximum spacing of the vertical flanging at both ends of the connecting circular convex hull is equal to the diameter of both ends of the axle housing.

[0042] S4: Use the fourth die to bend the long U-shaped blank 16 at both ends of the circular convex hull to close it into a tube body. The fourth die simultaneously closes the vertical flanging at both ends of the circular convex hull inward; the vertical flanging at both ends of the circular convex hull and the vertical flanging on both sides of the circular convex hull have an arc transition.

[0043] S5: Use a hydraulic press to shape the bent blank 16 to make the blank 16 flat and smooth as a whole.

[0044] S6: Weld the diamond-shaped sealing plate with connection holes to the diamond-shaped opening on the opposite side of the circular convex hull, and weld and seal the gap of the tube body closed on both sides of the circular convex hull.

[0045] The axle housing produced by the above process and die includes a circular convex hull and connecting pipes at both ends of the circular convex hull. The connecting pipes are connected to both ends of the circular convex hull. The connection between the circular convex hull and the connecting pipes has an arc transition and is integrally formed. There is a diamond-shaped opening on one side of the circular convex hull, a diamond-shaped sealing plate is arranged on the diamond-shaped opening, and connection holes are arranged on the diamond-shaped sealing plate; there are few welds throughout the body, and the main body is integrally stamped and formed, with high strength, effectively solving the problem of many welding points and easy damage in the current automobile axle housing.

Claims

1. A bridge housing forming mold, characterized in that: It comprises a first mold, having a first concave mold (1) and a first convex mold (2) which are closed together to form a first mold cavity, and the first mold cavity is adapted to the round convex hull at the middle upper part of the bridge housing; The second mold comprises a second female mold (3) and a second male mold (4) which are closed together to form a second mold cavity, the second male mold (4) is provided with a first punch (5) for trimming the blank (16) and a second punch (6) for punching the oil hole, the second female mold (3) is provided with a blanking table matched with the first punch (5), and the second female mold (3) is provided with a blanking hole matched with the second punch (6); A third mold, comprising a third concave mold (7) and a third convex mold (8) which are closed together to form a third mold cavity, the third concave mold (7) being provided with a punching groove matching the upper half of the bridge housing, and the third convex mold (8) being provided with a flanging protrusion (9) matching the punching groove; The fourth mold comprises a fourth concave mold (10) and a fourth convex mold (11) which are closed together to form a fourth mold cavity, and the fourth mold cavity is adapted to the outer shape of the bridge housing.

2. The bridge housing forming mold according to claim 1, characterized in that: The first male mold (2) is provided with a semicircular deformation protrusion, the deformation protrusion is provided with a stepped groove, and the first female mold (1) is provided with a groove matching the shape of the deformation protrusion.

3. The bridge housing forming mold according to claim 2, characterized in that: The second die (3) is provided with a positioning punch (12) for punching positioning holes at both ends of the blank (16).

4. The bridge housing forming mold according to claim 3, characterized in that: The first mold is provided with a material blocking plate (13) located around the blank (16).

5. The bridge housing forming mold according to claim 4, characterized in that: A forming block (14) is provided in the middle of the fourth punch (11) for forming vertical flanges on both sides of the round convex bulge; a guide slope (15) is provided on the opposite side of the fourth die (10) and the forming block (14); the guide slope (15) is used to bend the vertical flanges on both sides of the round convex bulge inward; arc grooves are provided at both ends of the middle of the fourth punch (11) to match the long U-shaped blanks (16) at both ends of the round convex bulge; and a V-shaped groove corresponding to the arc groove on the fourth punch (11) is provided on the fourth die (10).

6. The bridge housing forming mold according to claim 5, characterized in that: The trimming shape of the first punch (5) is adapted to the unfolded shape of the portion of the bridge housing located at the lower side of the circular convex bulge.

7. The bridge housing forming mold according to claim 6, characterized in that: The second concave mold (3) is provided with a positioning protrusion matched with the round convex bump on the bridge housing, and the second convex mold (4) is provided with a positioning groove matched with the positioning protrusion.

Images