Spoke forming combined die

Abstract

The utility model discloses a spoke forming combined die which comprises a pre-forming die and a forming die, and the pre-forming die comprises a first upper die, a first upper section die, a first lower die and a first lower section die; the surface shape of the top end of the first lower section mold is complementary to the surface shape of the bottom end of the first upper section mold, a positioning ring is fixedly arranged at the top end of the first lower section mold, and the inner diameter size of the positioning ring is equal to the diameter size of the first upper section mold; the forming mold comprises a second upper mold, a second upper section mold, an annular lower pressing mold, a second lower mold and a second lower section mold, the second upper section mold is arranged at the bottom end of the second upper mold in a lifting and sliding mode, the lower pressing mold is fixedly arranged at the bottom end of the second upper mold and arranged on the periphery of the second upper section mold in a sleeving mode, and the second lower section mold is fixedly arranged on the second lower mold; and a spoke semi-finished product is positioned and mounted between the second upper section mold and the second lower section mold. The combined die has the advantages that the forming precision of the spoke formed by the combined die is high, and the phenomenon of disqualification is not easy to occur.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel production, in particular to a spoke forming combined 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] In the production process of existing spokes, a single mold is usually used to form the spokes in one step. The one-step forming of the spokes has the disadvantage of low forming precision, and the spokes are prone to unqualified forming, which needs to be improved. Utility Model Content

[0004] The utility model aims to provide a spoke forming combined die with high forming precision and spokes that are not prone to unqualified phenomena.

[0005] The utility model provides a spoke forming combined die, comprising a preforming die and a forming die, wherein the preforming die processes a round flat steel plate into a spoke semi-finished product, and the forming die processes the spoke semi-finished product into a spoke finished product, wherein the preforming die comprises a first upper die, a first upper mold, a first lower mold and a first lower mold, wherein the first upper mold is fixedly arranged at the bottom end of the first upper mold, and the first lower mold is fixedly arranged at the top end of the first lower mold; the top end surface shape of the first lower mold is complementary to the bottom end surface shape of the first upper mold, and a positioning ring is fixedly arranged at the top end of the first lower mold, and the inner diameter size of the positioning ring is the same as the diameter size of the first upper mold. The round flat steel plate is positioned and installed in the positioning ring, and pre-forming is achieved by combining the first lower mold and the first upper mold; the forming mold includes a second upper mold, a second upper mold, a ring-shaped lower pressure mold, a second lower mold and a second lower mold, the second upper mold is lifted and slidably arranged at the bottom end of the second upper mold, the lower pressure mold is fixedly arranged at the bottom end of the second upper mold and sleeved on the outer periphery of the second upper mold, and the second lower mold is fixedly arranged on the second lower mold; the spoke semi-finished product is positioned and installed between the second upper mold and the second lower mold, the second upper mold descends to drive the lower pressure mold to bend the circumferential side of the spoke semi-finished product to fit with the circumferential side surface of the second lower mold.

[0006] Preferably, a ring-shaped mounting platform is formed on the peripheral side of the top surface of the first lower mold, the positioning ring is installed on the mounting platform, and the positioning ring is fixed to the first lower mold by bolts.

[0007] Preferably, the top surface of the first lower mold has an annular inclined surface located on the inner circumferential side of the positioning ring, and the horizontal position height of the inclined surface near the positioning ring is lower than that of the inclined surface far from the positioning ring.

[0008] Preferably, the included angle between the inclined surface and the horizontal plane is set to "N", satisfying 8 degrees < N < 12 degrees.

[0009] Preferably, the first lower mold includes a first lower template and a first lower backing plate. The first lower backing plate is installed on the first lower template, and the first lower mold is positioned and installed on the first lower backing plate. The first lower mold, the first lower backing plate, and the first lower template are fixed by bolt locking.

[0010] Preferably, a positioning groove is formed on the surface of the first lower backing plate, and a corresponding positioning portion is formed at the bottom end of the first lower mold. The positioning portion is snap-fitted into the positioning groove.

[0011] Preferably, a first through hole is formed at the center of the second upper mold, and a second through hole is formed at the center of the second lower mold. A center punch is fixedly provided at the center of the bottom end of the second upper mold, and the center punch passes through the first through hole.

[0012] Preferably, a positioning rod is fixedly provided at the center of the bottom end of the second upper mold. A positioning hole is formed on the surface of the center punch, and the positioning rod passes through the positioning hole of the center punch. The center punch and the second upper mold are fixed by bolt locking for detachable installation.

[0013] Preferably, a plurality of knockout holes are formed on the surface of the second upper mold, and knockout rods are inserted into the knockout holes. A limiting portion is formed at the top end of each knockout rod, and one end of each knockout rod far from the limiting portion is fixed to the second upper mold.

[0014] Preferably, the lower press mold includes an upper cushion block and a lower press block. The upper cushion block is arranged between the second upper mold and the lower press block, and the upper cushion block, the second upper mold, and the lower press block are fixed by bolt locking.

[0015] As can be seen from the above description of the present invention, the present invention has the following beneficial effects:

[0016] 1. The advantage of the present invention is that the spoke is preformed by a preforming mold first, and then the spoke is formed by a forming mold, so that the formed spoke has high forming accuracy and is not prone to unqualified phenomena.

[0017] 2. An annular mounting platform is formed on the peripheral side of the top surface of the first lower mold, on which a positioning ring is fixedly arranged, and the circular flat steel plate is positioned and installed through the inner diameter of the positioning ring, which has the advantage of precise positioning.

[0018] 3. A positioning groove is formed on the surface of the first lower pad, and a corresponding positioning portion is provided at the bottom end of the first lower mold. The positioning portion is embedded in the positioning groove, so that the first lower mold is accurately positioned and installed on the surface of the first lower pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a schematic diagram of the overall structure of the preforming mold of the embodiment;

[0020] Figure 2 is a cross-sectional view of a preforming die of an embodiment;

[0021] Figure 3 is a cross-sectional view of a first lower die and a first lower mold of an embodiment;

[0022] Figure 4 is an exploded schematic diagram of the first lower die, the first lower mold and the positioning ring of the embodiment;

[0023] Figure 5 is a bottom view of the first lower mold of the embodiment;

[0024] Figure 6 Schematic diagram of the overall structure of the molding die in the embodiment;

[0025] Figure 7 is a cross-sectional view of a molding die of an embodiment;

[0026] Figure 8 is a schematic structural diagram of the second upper mold of the embodiment;

[0027] Fig. 9 is a cross-sectional view of a second upper mold and a stripper rod of the embodiment;

[0028] Fig.10 Schematic diagram of the structure of the hole punch in the embodiment;

[0029] Fig.11 It is a schematic structural diagram of the second lower mold of the embodiment.

[0030] 1. Pre-forming mold; 11. First upper mold; 12. First upper die; 13. First lower mold; 131. First lower mold plate; 132. First lower pad; 133. Positioning groove; 14. First lower die; 141. Mounting table; 142. Inclined surface; 143. Positioning portion; 15. Positioning ring; 2. Forming mold; 21. Second upper mold; 211. Ejection hole; 22. Second upper die; 221. Positioning rod; 222. First through hole; 23. Lower pressing mold; 231. Upper pad; 232. Lower pressing block; 24. Second lower mold; 25. Second lower mold; 251. Second through hole; 26. Center hole punch; 261. Positioning hole; 27. Ejection rod; 271. Limiting portion. DETAILED DESCRIPTION

[0031] 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 1-11 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.

[0032] Reference Figure 1 , Figure 2 and Figure 3 A spoke forming combined die comprises a preforming die 1 and a forming die 2. The preforming die 1 is used to process a round flat steel plate into a spoke semi-finished product, and the forming die 2 is used to process the spoke semi-finished product into a spoke finished product. The preforming mold 1 includes a first upper mold 11, a first upper die 12, a first lower mold 13 and a first lower mold 14. The first upper mold 12 is fixedly arranged at the bottom center of the first upper mold 11, and the first lower mold 14 is fixedly arranged at the top of the first lower mold 13. The bottom end of the first upper mold 12 and the top end surface shape of the first lower mold 14 complement each other; a mounting platform 141 is formed on the peripheral side of the top end surface of the first lower mold 14, and the mounting platform 141 is annular. A positioning ring 15 is arranged on the mounting platform 141 of the first lower mold 14. The inner diameter of the positioning ring 15 is equal to the diameter of the first upper mold 12. The positioning ring 15 and the first lower mold 14 are fixed by bolts, and the top end surface of the positioning ring 15 is higher than the top end surface of the first lower mold 14.

[0033] On the top surface of the first lower mold 14, an annular inclined surface 142 is formed. The inclined surface 142 is located inside the positioning ring 15, and the height of the position of the inclined surface 142 close to the positioning ring 15 is lower than the height of the position of the inclined surface 142 far from the positioning ring 15. The included angle between the inclined surface 142 and the horizontal plane is set to "N", and the included angle between the inclined surface 142 and the horizontal plane satisfies 8 degrees < N < 12 degrees. When the round cake flat steel plate is processed between the first lower mold 14 and the first upper mold 12 to form a spoke semi-finished product, since the top surface of the first lower mold 14 is formed as the inclined surface 142, a bend of 8 degrees - 12 degrees can be generated on the circumferential side of the processed spoke semi-finished product, so as to continue to be formed into a spoke finished product in the forming mold 2.

[0034] Refer to Figure 4 and Figure 5 , the first lower mold 13 includes a first lower template 131 and a first lower backing plate 132. The first lower backing plate 132 is arranged on the first lower template 131. A positioning groove 133 is formed on the surface of the first lower backing plate 132. Correspondingly, a positioning portion 143 is formed at the bottom end of the first lower mold 14. When the first lower mold 14 is arranged on the first lower backing plate 132, the positioning portion 143 at the bottom end of the first lower mold 14 is clamped in the installation groove on the surface of the first lower backing plate 132, so that the first lower mold 14 is accurately positioned and installed on the first lower backing plate 132, and the first lower mold 14, the first lower backing plate 132 and the first lower template 131 are fixed by bolt locking.

[0035] Refer to Figure 6 and Figure 7 , the forming mold 2 includes a second upper mold 21, a second upper mold 22, a lower pressing mold 23, a second lower mold 24 and a second lower mold 25. The first upper mold 12 is arranged to be lifted and lowered at the bottom end of the second upper mold 21. The lower pressing mold 23 is annular. The lower pressing mold 23 is fixedly arranged at the bottom end of the second upper mold 21 and sleeved around the second upper mold 22; the lower pressing mold 23 is composed of an upper cushion block 231 and a lower pressing block 232. The upper cushion block 231 is arranged between the second upper mold 21 and the lower pressing block 232, and the second upper mold 21, the upper cushion block 231 and the lower pressing block 232 are fixed by bolt locking. The second lower mold 25 is fixedly arranged on the second lower mold 24. The shape between the top surface of the second lower mold 25 and the bottom surface of the second upper mold 22 complements each other and matches the shapes of both sides of the spoke semi-finished product respectively.

[0036] Refer to Figure 8 and Fig. 9In order to realize the lifting and lowering installation between the second upper mold 22 and the second upper mold 21, a plurality of material withdrawal holes 211 are formed on the surface of the second upper mold 21, and a material withdrawal rod 27 is inserted in each material withdrawal hole 211. A limiting portion 271 is formed at the top of the material withdrawal rod 27, and one end of each material withdrawal rod 27 away from the limiting portion 271 is fixedly connected to the second upper mold 22. When the spoke semi-finished product needs to be positioned and installed on the forming mold 2, the material withdrawal rod 27 is lifted to make the second upper mold 22 rise, and the spoke semi-finished product is placed on the second lower mold 25. Then, the second upper mold 22 abuts against the spoke semi-finished product under the action of gravity, so that the spoke semi-finished product is positioned and installed between the second upper mold 22 and the second lower mold 25.

[0037] Reference Fig.10 and Fig.11 In addition, a positioning rod 221 is fixedly provided at the center of the bottom end of the second upper die 21, and a positioning hole 261 is formed on the surface of the center hole punch 26. According to the size of the center hole of the spoke to be processed, the corresponding center hole punch 26 is selected and installed at the bottom end of the second upper die 21, so that the positioning rod 221 is inserted into the positioning hole 261 of the center hole punch 26, and the center hole punch 26 and the second upper die 21 are fixed by bolts. In addition, a first through hole 222 is formed at the center of the surface of the second upper die 22, and a second through hole 251 is formed at the center of the surface of the second lower die 25. The center hole punch 26 is inserted into the first through hole 222 on the surface of the second upper die 22. The arrangement of the center hole punch 26 at the bottom end of the second upper die 21 enables the center hole processing of the surface of the spoke to be performed during the process of forming the spoke.

[0038] The specific implementation principle of the embodiment of the present application is: when it is necessary to process the circular flat steel plate into a finished spoke, the circular flat steel plate is positioned and installed on the first lower mold 14 of the preforming mold 1, and the circular flat steel plate is positioned using the inner diameter of the positioning ring 15. As the first upper mold 11 and the first upper mold 12 descend, the circular flat steel plate is bent to form a semi-finished spoke. Since the peripheral side of the top surface of the upper mold is an inclined surface 142, the peripheral side of the formed spoke semi-finished product is slightly inclined downward.

[0039] Then, the second upper die 22 in the forming die 2 is lifted, and the processed spoke semi-finished product is placed on the second lower die 25. The second upper die 22 abuts against the spoke semi-finished product under the action of gravity, so that the spoke semi-finished product is positioned between the second upper die 22 and the second lower die 25 by its shape. The second upper die 21 and the lower die 23 move downward, so that the second upper die 22 presses the spoke semi-finished product against the second lower die 25, thereby simultaneously completing the punching of the middle hole on the surface of the spoke semi-finished product by the center hole punch 26 at the bottom end of the second upper die 21; the lower die 23 moves downward to bend the circumference of the spoke semi-finished product to abut against the circumference surface of the second lower die 25. The round flat steel plate is processed and formed into a spoke finished product twice by the preforming die 1 and the forming die 2, which has the advantage of high forming accuracy.

[0040] 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 assembly die, characterized in that: It includes a preforming die and a forming die. The preforming die processes a flat circular steel plate into a semi-finished spoke, and the forming die processes the semi-finished spoke into a finished spoke. The preforming die includes a first upper die, a first upper mold, a first lower die, and a first lower mold. The first upper mold is fixedly arranged at the bottom end of the first upper die, and the first lower mold is fixedly arranged at the top end of the first lower die; The shape of the top surface of the first lower mold is complementary to the shape of the bottom surface of the first upper mold. A positioning ring is fixedly arranged at the top end of the first lower mold. The inner diameter of the positioning ring is equal to the diameter of the first upper mold. The flat circular steel plate is positioned and installed in the positioning ring, and the preforming is realized by closing the first lower mold and the first upper mold; The forming die includes a second upper die, a second upper mold, a ring-shaped lower pressing die, a second lower die, and a second lower mold. The second upper mold is arranged to lift and slide at the bottom end of the second upper die. The lower pressing die is fixedly arranged at the bottom end of the second upper die and sleeved around the second upper mold. The second lower mold is fixedly arranged on the second lower die; The semi-finished spoke is positioned and installed between the second upper mold and the second lower mold. The second upper die descends to drive the lower pressing die to bend the periphery of the semi-finished spoke to fit with the peripheral surface of the second lower mold.

2. The spoke forming assembly mold according to claim 1, characterized in that: An annular installation table is formed by opening on the peripheral side of the top surface of the first lower mold. The positioning ring is installed on the installation table, and the positioning ring is fixed to the first lower mold by bolt locking.

3. The spoke forming assembly mold according to claim 2, characterized in that: An annular inclined surface is arranged on the top surface of the first lower mold. The inclined surface is located on the inner peripheral side of the positioning ring. The horizontal position height of the inclined surface near the positioning ring is lower than the horizontal position height of the inclined surface far from the positioning ring.

4. The spoke forming assembly mold according to claim 3, characterized in that: The included angle between the inclined surface and the horizontal plane is set to "N", and it satisfies 8 degrees < N < 12 degrees.

5. The spoke forming assembly mold according to claim 1, characterized in that: The first lower die includes a first lower template and a first lower backing plate. The first lower backing plate is installed on the first lower template. The first lower mold is positioned and installed on the first lower backing plate. The first lower mold, the first lower backing plate, and the first lower template are fixed by bolt locking.

6. The spoke forming assembly mold according to claim 5, characterized in that: A positioning groove is formed by opening on the surface of the first lower backing plate. A corresponding positioning part is formed at the bottom end of the first lower mold. The positioning part is snap-fitted and installed in the positioning groove.

7. The spoke forming assembly mold according to claim 1, characterized in that: A first through hole is formed by opening at the center of the second upper mold. A second through hole is formed by opening at the center of the second lower mold. A middle hole punch is fixedly arranged at the center of the bottom end of the second upper die. The middle hole punch passes through the first through hole.

8. The spoke forming assembly mold according to claim 7, characterized in that: A positioning rod is fixedly arranged at the center of the bottom end of the second upper die. A positioning hole is formed by opening on the surface of the middle hole punch. The positioning rod passes through the positioning hole of the middle hole punch. The middle hole punch and the second upper die are fixed by bolt locking to achieve detachable installation and fixation.

9. The spoke forming assembly mold according to claim 1, characterized in that: A plurality of material discharging holes are formed by opening on the surface of the second upper die. A material discharging rod is inserted into each material discharging hole. A limiting part is formed at the top end of the material discharging rod. One end of each material discharging rod far from the limiting part is fixed to the second upper mold.

10. The spoke forming assembly mold according to claim 1, characterized in that: The lower pressing die comprises an upper cushion block and a lower pressing block, wherein the upper cushion block is arranged between the second upper die and the lower pressing block, and the upper cushion block, the second upper die and the lower pressing block are fixed by bolts.

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