Spoke forming die

Abstract

The utility model discloses a spoke forming die which comprises an upper die, an upper section die and an upper pressing die, the upper section die is arranged in the center of the bottom end of the upper die in a lifting and sliding mode, and the upper pressing die is annular and arranged on the periphery of the upper section die in a sleeved mode. The device further comprises a lower die and a lower section die, the lower section die is fixedly arranged in the center of the top end of the lower die, the surface of the top end of the lower section die and the surface of the bottom end of the upper section die are complementary in shape and are matched with the surfaces of the two sides of the spoke in shape respectively, and the spoke is positively installed on the lower section die through appearance positioning. The peripheral side surface of the lower section mold inclines inwards from the top end to the bottom end, and the upper pressing mold moves downwards so that the peripheral side of the spoke can be bent inwards to be attached to the peripheral side surface of the lower section mold. The spoke forming die has the advantages that the peripheral side surface of the lower forming die inclines inwards from the top end to the bottom end, so that the peripheral side of a spoke can still be kept in a vertical state after being formed and rebounded, and the formed spoke has better anti-fatigue performance.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel production, in particular to a spoke forming die. Background Art

[0002] At present, the main processes for producing steel wheel spokes include: blanking, drawing, reverse drawing, primary forming, trimming, flanging, punching screw holes, extruding screw holes, punching center holes and punching air holes. The production of steel wheel spokes generally involves first shearing long sheets into spoke sheets through a shearing and blanking process, and then processing the sheets into spokes through multiple stamping processes.

[0003] After the spoke is flanged, the spoke's circumference will rebound, so that the spoke's circumference cannot remain vertical after flanged. This results in the spoke having poor fatigue resistance after flanged, and this needs to be improved. Utility Model Content

[0004] The utility model aims to provide a spoke forming die which enables the spoke to have better fatigue resistance after forming.

[0005] The utility model proposes a spoke forming mold, comprising an upper mold, an upper mold and an upper pressure mold, wherein the upper mold is lifted and slidably arranged at the bottom center of the upper mold, and the upper pressure mold is ring-shaped and sleeved on the periphery of the upper mold; it also includes a lower mold and a lower mold, wherein the lower mold is fixedly arranged at the top center of the lower mold, the top surface of the lower mold and the bottom surface of the upper mold are complementary in shape and respectively match the surface shapes of both sides of the spoke, and the spoke is mounted on the lower mold by using the outer shape positioning; the peripheral side surface of the lower mold is inclined inwardly from the top to the bottom, and the upper pressure mold is moved downward to bend the peripheral side of the spoke inwardly to fit with the peripheral side surface of the lower mold.

[0006] Preferably, a first through hole is formed at the center of the upper die, a second through hole is formed at the center of the lower die, and a center hole punch is fixedly provided at the center of the bottom end of the upper die, and the center hole punch is inserted into the first through hole.

[0007] Preferably, bolts are used to lock the center hole punch and the upper die to achieve removable installation and fixation.

[0008] Preferably, a positioning rod is fixedly provided at the center of the bottom end of the upper die, a positioning hole is formed on the surface of the center hole punch, and the positioning rod is inserted into the positioning hole of the center hole punch.

[0009] Preferably, a plurality of material withdrawal holes are formed on the surface of the upper mold, a material withdrawal rod is inserted into each of the material withdrawal holes, a limiting portion is formed at the top end of the material withdrawal rod, and one end of each material withdrawal rod away from the limiting portion is fixed to the upper mold.

[0010] Preferably, the inclination angle between the peripheral surface of the lower mold and the inner surface of the lower die is set to C, and satisfies C=3 degrees.

[0011] Preferably, the upper die includes an upper die base, an upper fixed pad and an upper fixed plate, and the upper fixed pad is fixedly arranged between the upper die base and the upper fixed plate; the upper pressure die includes an upper pad and a lower pressure block, and the upper pad is arranged between the upper die base and the lower pressure block, and the upper pad, the upper die base and the lower pressure block are fixed by bolts.

[0012] Preferably, the lower die includes a lower die base and a lower pad, the lower pad is located at the center of the top end of the lower die base, a mounting groove is formed on the surface of the lower pad, a mounting portion is provided at the bottom end of the lower mold, the mounting portion at the bottom end of the lower mold is embedded in the mounting groove, and the lower die base, the lower pad and the lower mold are fixed by bolts.

[0013] From the above description of the utility model, it can be seen that the utility model has the following beneficial effects:

[0014] 1. The circumferential surface of the lower mold is set to be inclined inward from the top to the bottom. After the spoke is formed by the spoke forming mold, the circumferential surface of the spoke can still maintain a vertical state after rebound, and the formed spoke has better fatigue resistance.

[0015] 2. The top surface of the lower mold and the bottom surface of the upper mold complement each other and match the two side surfaces of the spoke respectively. The spoke is installed in the spoke forming mold through shape positioning, which has the advantage of precise installation and positioning.

[0016] 3. A center hole punch is detachably mounted and fixedly provided at the bottom of the upper die, and can be replaced according to spokes with center holes of different models, so that the spoke forming die has the advantage of a wide range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of a spoke forming mold in an embodiment;

[0018] Figure 2 is a cross-sectional view of a spoke forming die of an embodiment;

[0019] Figure 3 2 is a schematic structural diagram of an upper mold and a positioning rod in an embodiment;

[0020] Figure 4 is a cross-sectional view of a stripper rod and an upper mold of an embodiment;

[0021] Figure 5 Schematic diagram of the structure of the hole punch in the embodiment;

[0022] Figure 6 It is a structural schematic diagram of the mold under the embodiment;

[0023] Figure 7 is a schematic structural diagram of a bottom pad of an embodiment;

[0024] Figure 8 It is an embodiment Figure 2 A partial enlarged view of point A in the middle.

[0025] 1. Upper die; 11. Upper die seat; 12. Upper fixed pad; 13. Upper fixed plate; 131. Positioning rod; 14. Material withdrawal hole; 2. Upper mold; 21. Material withdrawal rod; 211. Limiting portion; 22. First through hole; 3. Upper pressure die; 31. Upper pad; 32. Lower pressure block; 4. Lower die; 41. Lower die seat; 42. Lower pad; 421. Mounting groove; 5. Lower mold; 51. Second through hole; 52. Mounting portion; 6. Center hole punch; 61. Positioning hole. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-8 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Reference Figure 1-Figure 4 A spoke forming mold comprises an upper mold 1, an upper mold 2, an upper pressure mold 3, a lower mold 4 and a lower mold 5, wherein the upper mold 1 comprises an upper mold base 11, an upper fixed pad 12 and an upper fixed plate 13, wherein the upper fixed pad 12 is arranged at the bottom center of the upper mold base 11, and the upper fixed plate 13 is arranged at the bottom center of the upper fixed pad 12, and the upper mold base 11, the upper fixed pad 12 and the upper fixed plate 13 are fixed by bolts. The upper mold 2 is set at the bottom of the upper fixed plate 13 for lifting and sliding movement, and a plurality of material withdrawal holes 14 are formed on the surface of the upper mold 1. Each material withdrawal hole 14 completely penetrates the upper mold base 11, the upper fixed pad 12 and the upper fixed plate 13, and a material withdrawal rod 21 is passed through each material withdrawal hole 14, and a limiting portion 211 is set at one end of the material withdrawal rod 21, and the limiting portion 211 abuts against the upper mold base 11, and the end of the material withdrawal rod 21 away from the limiting portion 211 is fixed to the upper mold 2, so that the upper mold 2 and the upper mold 1 maintain a lifting and sliding connection.

[0028] Reference Figure 4 , Figure 5 and Figure 6In the process of forming the spoke, in order to form the center hole in the spoke synchronously. A positioning rod 131 is fixedly arranged at the center of the bottom end of the upper fixing plate 13, and a center hole punch 6 is arranged at the bottom end of the upper fixing plate 13. A positioning hole 61 is formed on the surface of the center hole punch 6. The positioning hole 61 is opened in the vertical direction of the center hole punch 6, and the diameter of the positioning hole 61 opened on the surface of each center hole punch 6 is the same as the diameter of the positioning rod 131. When installing the center hole punch 6, the positioning rod 131 at the bottom end of the upper fixing plate 13 is inserted into the positioning hole 61 of the center hole punch 6, and the center hole punch 6 and the upper fixing plate 13 are fixed by bolts. In this way, the center hole punch 6 and the upper fixing plate 13 are detachably installed, so that different types of center hole punches 6 can be replaced, so that different types of spokes can be formed. A first through hole 22 is formed at the center position of the surface of the upper mold 2, and a second through hole 51 is formed at the center position of the surface of the lower mold 5. The size of the first through hole 22 on the surface of the upper mold 2 and the second through hole 51 on the surface of the lower mold 5 correspond to the size of the center hole punch 6, so that the center hole punch 6 is inserted into the first through hole 22.

[0029] Reference Figure 6 and Figure 7 The lower die 4 includes a lower die seat 41 and a lower pad 42, wherein the lower pad 42 is arranged at the top center of the lower die seat 41, the lower mold 5 is installed on the lower pad 42, and the lower die seat 41, the lower pad 42 and the lower mold 5 are fixed by bolts, so that the lower mold 5 can be detachably installed on the lower pad 42. When it is necessary to form spokes of different types, the lower mold 5 corresponding to the spoke type is selected, and a mounting groove 421 is formed on the surface of the lower pad 42, and a mounting portion 52 is correspondingly formed at the bottom end of the lower mold 5, so that the mounting portion 52 at the bottom end of the lower mold 5 is embedded in the mounting groove 421 on the surface of the lower pad 42, so that the lower mold 5 can be accurately positioned and installed on the lower pad 42. In the spoke forming mold, the bottom surface shape of the upper mold 2 and the top surface shape of the lower mold 5 complement each other, and the bottom surface of the upper mold 2 and the top surface shape of the lower mold 5 match the shapes of the two side surfaces of the spoke respectively. When the spoke to be formed is formed by the spoke forming die, the spoke is positioned on the lower die 5 according to its shape, and the upper die 2 abuts against the spoke under the action of its own weight, thereby facilitating the stamping and forming of the spoke.

[0030] Reference Figure 1 and Figure 8The upper die 3 includes an upper pad 31 and a lower pad 32, both of which are annular. The upper pad 31 is arranged at the bottom end of the upper die seat 11, and the upper pad 31 is sleeved on the outer periphery of the upper fixed plate 13 and the upper fixed pad 12. The lower pad 32 is arranged at the bottom end of the upper pad 31, and the lower pad 32, the upper pad 31 and the upper die seat 11 are fixed by bolts. When the lower pad 32 is removed from the bottom end of the upper pad 31, it is convenient to remove and replace the upper die 2 and the middle hole punch 6. Since the circumference of the spoke will rebound after being bent and formed. Therefore, the circumferential surface of the lower die 5 is set to be inclined inward from the top to the bottom, and the inclination angle between the circumferential surface of the lower die 5 and the lower pad 32 is set to C, and the inclination angle satisfies C=3 degrees. As a result, the circumferential side of the spoke is bent and formed to tilt inward, and then rebounds to make the circumferential side of the spoke in a vertical state, so that the formed spoke has better fatigue resistance.

[0031] The specific implementation principle of the embodiment of the present application is: when it is necessary to use the spoke forming mold to form the spoke, select the lower mold 5 corresponding to the model of the spoke to be formed and fixedly installed on the lower mold base 41, select the middle hole punch 6 corresponding to the model of the spoke air hole to be formed and sleeve it on the periphery of the positioning rod 131, and sleeve the upper mold 2 on the periphery of the middle hole punch 6 and fix it to the return rod 21. Finally, the upper die 3 can be fixedly installed on the bottom end of the upper die base 11, so that the periphery of the upper die 3 is sleeved on the periphery of the upper fixed pad 12 and the upper fixed plate 13.

[0032] When installing the spoke, lift the ejector rod 21 to raise the upper die 2, install the spoke on the lower die 5, and use the shape of the spoke to achieve positioning and installation between it and the lower die 5. Then the upper die 2 abuts against the spoke under the action of gravity, so as to achieve accurate positioning and installation of the spoke to be formed. As the upper die 1, the center hole punch 6 and the lower die go down, the center hole punch 6 punches the surface of the spoke to form a center hole, and the lower die goes down to bend the circumference of the spoke to fit the circumference of the lower die 5. Then the circumference of the spoke rebounds to maintain a vertical state, so that the formed spoke has better fatigue resistance.

[0033] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all protected by the utility model.

Claims

1. A spoke forming die, characterized in that: It includes an upper die, an upper mold and an upper pressing die, wherein the upper mold is lifted and slidably arranged at the bottom center of the upper die, and the upper pressing die is annular and sleeved on the periphery of the upper mold; It also includes a lower mold and a lower mold, wherein the lower mold is fixedly arranged at the center of the top end of the lower mold, the top end surface of the lower mold and the bottom end surface of the upper mold complement each other and match the shapes of the two side surfaces of the spokes respectively, and the spokes are mounted on the lower mold by using the shape positioning; The peripheral side surface of the lower mold is inclined inward from the top to the bottom, and the upper pressing mold moves downward to bend the peripheral side of the spoke inward to fit with the peripheral side surface of the lower mold.

2. A spoke forming mold according to claim 1, characterized in that: A first through hole is formed at the center of the upper die, a second through hole is formed at the center of the lower die, and a center hole punch is fixedly arranged at the center of the bottom end of the upper die, and the center hole punch is inserted into the first through hole.

3. A spoke forming mold according to claim 2, characterized in that: The middle hole punch and the upper die are locked with bolts to achieve detachable installation and fixation.

4. A spoke forming mold according to claim 2, characterized in that: A positioning rod is fixedly arranged at the center of the bottom end of the upper die, a positioning hole is formed on the surface of the center hole punch, and the positioning rod is penetrated into the positioning hole of the center hole punch.

5. The spoke forming mold according to claim 1, characterized in that: A plurality of material withdrawal holes are formed on the surface of the upper mold, and a material withdrawal rod is inserted into each of the material withdrawal holes. A limiting portion is formed at the top of the material withdrawal rod, and one end of each material withdrawal rod away from the limiting portion is fixed to the upper mold.

6. The spoke forming mold according to claim 1, characterized in that: The inclination angle between the peripheral surface of the lower mold and the inner surface of the lower die is set to C, and satisfies C=3 degrees.

7. The spoke forming mold according to claim 1, characterized in that: The upper die includes an upper die base, an upper fixed pad and an upper fixed plate, wherein the upper fixed pad is fixedly arranged between the upper die base and the upper fixed plate; the upper pressure die includes an upper pad and a lower pressure block, wherein the upper pad is arranged between the upper die base and the lower pressure block, and the upper pad, the upper die base and the lower pressure block are fixed by bolts.

8. The spoke forming mold according to claim 1, characterized in that: The lower die includes a lower die base and a lower pad, the lower pad is located at the center of the top end of the lower die base, a mounting groove is formed on the surface of the lower pad, a mounting portion is provided at the bottom end of the lower mold, the mounting portion at the bottom end of the lower mold is embedded in the mounting groove, and the lower die base, the lower pad and the lower mold are fixed by bolts.

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