Press fit steel wheel assembly jig

Abstract

The utility model discloses a kind of press-fitting type steel wheel assemblies, including upper die and lower die, upper die includes upper die seat, upper die pad and forming upper die;Lower die includes lower die plate, lower die pad, rectangular spring, middle guide column, forming lower die, positioning pin, spoke positioning disc and rim positioning disc, middle guide column lifting sliding is arranged in lower die pad, rectangular spring is arranged between middle guide column and lower die plate;Forming lower die is set at the top end of middle guide column, the center of forming lower die is provided with pin groove, the bottom end of positioning pin is clamped in pin groove, spoke positioning disc is sleeved in the periphery of positioning pin, rim positioning disc is sleeved in the periphery of lower die pad;The top end of forming lower die is set as annular inclined plane, the bottom end surface of forming upper die and the top end surface of forming lower die can be embedded.This utility model is characterized in that the spoke and rim of military card are pressed and fitted by the assembly die, and the spoke and rim still have high qualified rate after double-sided welding.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a press-fit steel wheel assembly vertical mold. Background Technology

[0002] The structure of military truck wheels differs significantly from that of conventional wheels, primarily in the spoke structure: military trucks, short for military-grade trucks, have spokes formed from flat, ring-shaped plates through a pressing process, resulting in a relatively small height; while conventional wheels, also formed from flat, ring-shaped plates, generally have a larger height. Military truck spokes are typically mounted at the bottom of the rim groove with a smaller offset, while conventional wheel spokes are mounted on locations other than the bottom of the groove with a larger offset. Military truck spokes are welded to the rim on both sides, resulting in a large heat input and a small spoke area, leading to significant thermal deformation; conventional wheels require only one welding step, resulting in a smaller heat input and a larger spoke area, leading to relatively less thermal deformation. Due to these significant structural differences and variations in heat input and thermal deformation during manufacturing, quality control in military truck manufacturing is considerably more challenging.

[0003] Traditional military truck manufacturing processes utilize conventional molds for machining the center hole and press-fitting. However, due to significant heat deformation during welding between the wheel spokes and rim, the spokes tend to arch towards the convex side after the vehicle cools to room temperature. This results in a high rate of defects in the center hole, flatness, end runout, and radial runout, necessitating improvements. Utility Model Content

[0004] The purpose of this utility model is to propose a press-fit steel wheel assembly mold, which completes the press-fit of the spokes and rims of military trucks. After the spokes and rims are welded on both sides and thermally deformed, the center hole, flatness, end runout and radial runout of the military truck still have a high pass rate.

[0005] This utility model proposes a press-fit steel wheel assembly mold, including an upper mold and a lower mold. The upper mold includes an upper mold base, an upper mold pad, and a forming upper mold. The upper mold pad is fixedly disposed at the bottom center of the upper mold base, and the forming upper mold is fixedly disposed at the bottom center of the upper mold pad. The lower mold includes a lower mold plate, a lower mold pad, a rectangular spring, a central guide post, a forming lower mold, a positioning pin, a spoke positioning plate, and a rim positioning plate. The lower mold pad is fixedly disposed on the lower mold plate. The central guide post is slidably disposed within the lower mold pad. The rectangular spring is disposed between the central guide post and the lower mold plate. The forming lower mold is fixedly disposed at the top center of the central guide post. A pin groove is formed through the center of the forming lower mold. The bottom end of the positioning pin is embedded in the pin groove. The spoke positioning plate is mounted on the forming lower mold and sleeved around the positioning pin. The rim positioning plate is sleeved around the lower mold pad. The top end of the forming lower mold is configured as an annular inclined surface, and the bottom end surface of the forming upper mold can be fitted with the top end surface of the forming lower mold.

[0006] Preferably, a positioning post is vertically fixed at the center of the lower template, and a spring groove is formed at the center of the bottom end of the middle guide post. The rectangular spring is sleeved around the positioning post and passes through the spring groove.

[0007] Preferably, a guide key is vertically fixed on one side of the middle guide post, and a guide groove is vertically opened through the side wall of the lower mold pad, with the guide key being embedded in the guide groove.

[0008] Preferably, the side wall of the central guide post is provided with an installation groove, the guide key is partially embedded in the installation groove, and the guide key and the central guide post are fixed together by bolts.

[0009] Preferably, a planar ring is provided between the lower template and the rim positioning plate. The planar ring is sleeved around the lower pad. Several receiving grooves are formed in the planar ring. Each receiving groove is provided with an adjusting spring. The top of each adjusting spring abuts against the rim positioning plate.

[0010] Preferably, the taper of the inclined surface at the top of the lower forming die is set to 3 degrees.

[0011] Preferably, the lower mold pad and the lower mold plate, as well as the lower forming mold and the middle guide post, are all fixed by bolts.

[0012] Preferably, a first positioning groove is formed at the bottom center of the upper mold base, and a first positioning platform is provided at the top center of the upper mold pad, with the first positioning platform being fitted into the first positioning groove.

[0013] Preferably, a second positioning groove is provided at the center of the top of the upper mold, and a second positioning platform is provided at the center of the bottom of the upper mold pad, with the second positioning platform being fitted into the second positioning groove.

[0014] Preferably, a plurality of guide posts are vertically arranged on the lower template, and a guide post guard is provided around each guide post and fixed to the lower template. A plurality of guide sleeves are vertically arranged at the bottom of the upper mold base, and each guide sleeve passes through the upper mold base, with the guide posts passing through the guide sleeves.

[0015] As can be seen from the above description of this utility model, this utility model has the following beneficial effects:

[0016] 1. The top surface of the lower forming die of this set of vertical molds is set as an annular inclined surface with a taper of 3 degrees. The bottom end of the corresponding upper forming die is set to fit into the top end of the lower forming die. The spokes and rims of the military truck are press-fitted by this set of vertical molds. After double-sided welding, the press-fitted spokes and rims still have a high pass rate. The size of the center hole, flatness, end runout and radial runout can all be kept within the standard range.

[0017] 2. A guide key is fixedly installed on one side of the central guide pillar, and a guide groove is vertically opened through the side wall of the lower mold plate, and the guide key on one side of the central guide pillar is embedded in the guide groove; thus, the central guide pillar can remain stable during the upgrading process to prevent relative rotation.

[0018] 3. A flat ring is provided between the lower template and the rim positioning plate. The flat ring is fitted around the lower pad and several receiving grooves are formed in the flat ring. Each receiving groove is provided with an adjusting spring. The rim positioning plate abuts against the inner wall of the rim under the elastic force of each adjusting spring. The setting of each adjusting spring at the bottom of the rim positioning plate allows the rim positioning plate to be adapted and positioned to fit different models of rims. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a press-fit steel wheel assembly vertical mold according to an embodiment;

[0020] Figure 2 This is a top view of a press-fit steel wheel assembly mold according to an embodiment;

[0021] Figure 3 This is an example. Figure 2 Sectional view at point AA;

[0022] Figure 4 This is an example. Figure 2 Sectional view at point BB;

[0023] Figure 5 This is a bottom view of the mold base in the embodiment;

[0024] Figure 6 This is a front view of the mold pad in the embodiment;

[0025] Figure 7 This is a cross-sectional view of the upper mold of the embodiment;

[0026] Figure 8 This is a schematic diagram of the structure of the guide post and guide slide key in the embodiment;

[0027] Figure 9 This is a schematic diagram of the structure of the mold pad in the embodiment;

[0028] Figure 10 This is a cross-sectional view of the mold in the embodiment;

[0029] Figure 11 This is a schematic diagram of the planar ring structure in the embodiment;

[0030] Figure 12 This is a cross-sectional view of the lower mold of the embodiment;

[0031] Figure 13 This is a schematic diagram showing the state of the spokes and rim during the press-fitting process in the embodiment.

[0032] Figure 14 This is a cross-sectional view of the press-fit steel wheel of the embodiment.

[0033] Reference numerals: 1. Upper mold; 11. Upper mold base; 111. First positioning groove; 112. Guide sleeve; 12. Upper mold pad; 121. First positioning platform; 122. Second positioning platform; 13. Forming upper mold; 131. Second positioning groove; 2. Lower mold; 21. Lower template; 211. Positioning post; 212. Guide post; 213. Guide post guard; 22. Flat ring; 221. Receiving groove; 222. Adjusting spring; 23. Lower mold pad; 231. Guide slide groove; 24. Rectangular spring; 25. Middle guide post; 251. Spring groove; 252. Guide slide key; 253. Mounting groove; 26. Forming lower mold; 261. Pin groove; 262. Inclined surface; 27. Positioning pin; 28. Wheel spoke positioning plate; 29. ​​Wheel rim positioning plate; 3. Wheel spoke; 4. Wheel rim; 5. Weld. Detailed Implementation

[0034] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer and more understandable, the following description is provided in conjunction with the appendix. Figure 1-14 The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0035] Reference Figures 1-7 A press-fit steel wheel assembly vertical mold includes an upper mold 1 and a lower mold 2. The upper mold 1 includes an upper mold base 11, an upper mold pad 12, and a forming upper mold 13. The upper mold pad 12 is fixedly disposed at the bottom center of the upper mold base 11, and the forming upper mold 13 is fixedly disposed at the bottom center of the upper mold pad 12. To ensure accurate installation of the upper mold pad 12 and the forming upper mold 13, a first positioning groove 111 is formed at the bottom center of the upper mold base 11, and a corresponding first positioning platform 121 is provided at the top center of the upper mold pad 12. The first positioning platform 121 is fitted into the first positioning groove 111 at the bottom of the upper mold base 11, and the upper mold pad 12 and the upper mold base 11 are fixed together by bolts. A second positioning platform 122 is provided at the bottom center of the upper mold pad 12, and a second positioning groove 131 is formed at the top center of the upper mold 13. The second positioning groove 131 of the upper mold 13 is fitted around the second positioning platform 122, and the upper mold 13 and the upper mold pad 12 are fixed together by bolts.

[0036] Reference Figure 3 and Figure 4The lower mold 2 includes a lower template 21, a flat ring 22, a lower mold pad 23, a rectangular spring 24, a central guide post 25, a forming lower mold 26, a positioning pin 27, a spoke positioning plate 28, and a rim positioning plate 29. The lower mold pad 23 is annular and is installed at the top center of the lower template 21, and is fixed to the lower template 21 with bolts. This bolt-fixing method not only provides a secure fixation but also facilitates easy disassembly. A positioning post 211 is vertically fixed at the center of the surface of the lower template 21, located inside the flat ring 22, and the rectangular spring 24 is sleeved around the positioning post 211.

[0037] Reference Figure 8 and Figure 9 The central guide post 25 is slidably positioned within the lower mold base plate 23. A spring groove 251 is formed at the bottom end of the central guide post 25, allowing a rectangular spring 24 to be engaged within it. In this way, under the action of the rectangular spring 24, the central guide post 25 protrudes from the top surface of the lower mold base plate 23 in its natural state. To prevent relative rotation of the central guide post 25 during lifting and lowering, a guide key 252 is fixedly provided on one side of the central guide post 25. Correspondingly, a guide groove 231 is vertically formed through the side wall of the lower mold base plate 23, allowing the guide key 252 to be engaged within and move up and down along the guide groove 231. To facilitate the disassembly and installation of the guide key 252 and the middle guide post 25, an installation groove 253 is formed on one side of the middle guide post 25. One side of the guide key 252 is inserted into the installation groove 253, and the guide key 252 and the middle guide post 25 are fixed together with bolts. After installation, the guide key 252 protrudes from the outer surface of the middle guide post 25.

[0038] Reference Figure 10 and Figure 11 The lower forming mold 26 is positioned at the center of the top of the central guide post 25, and the lower forming mold 26 and the central guide post 25 are fixed together with bolts. This bolt-fixing method not only provides a secure hold but also allows for easy disassembly. To ensure precise positioning of the spoke positioning disc 28, a pin groove 261 is formed through the center of the lower forming mold 26, and a positioning pin 27 is fitted into the pin groove 261, protruding from the surface of the lower forming mold 26. After the spoke positioning disc 28 is installed at the top of the lower forming mold 26, it is fitted around the positioning pin 27, thus ensuring accurate positioning of the spoke positioning disc 28.

[0039] A planar ring 22 is fitted around the lower mold pad 23, and several receiving grooves 221 are formed on the surface of the planar ring 22. These grooves are evenly distributed along the circumference of the planar ring 22, and an adjusting spring 222 is installed within each groove 221. A rim positioning disc 29 is fitted around the lower mold pad 23 and positioned above the planar ring 22, so that the rim positioning disc 29 abuts against each adjusting spring 222. When pressing the spokes 3 and rim 4 together, the rim 4 is fitted around the rim positioning disc 29, and the rim positioning disc 29 abuts against the inner wall of the rim 4 under the elastic force of the adjusting springs 222. The springs in the planar ring 22 allow the rim positioning disc 29 to accommodate different models of rim 4 for positioning and installation.

[0040] The upper mold 1 is lifted and lowered by a hydraulic device. To ensure stability during this process, several guide pillars 212 are vertically installed on the lower mold plate 21, and guide pillar supports 213 are fitted around each guide pillar 212, with each support fixed to the lower mold plate 21. Correspondingly, several guide sleeves 112 are fixedly installed at the bottom of the upper mold base 11, passing through the upper mold base 11 and allowing the guide pillars 212 to pass within them. During the lifting and lowering of the upper mold 1 by the hydraulic device, each guide sleeve 112 moves up and down along the guide pillars 212.

[0041] Reference Figure 10 and Figure 12 After welding the spokes 3 to the rim 4, significant thermal deformation occurs. To ensure the flatness of the spokes 3 meets the requirements after welding, the top surface of the lower forming die 26 is configured as an annular inclined surface 262, with the horizontal height of this inclined surface 262 gradually decreasing from the center of the top of the lower forming die 26 to the outer periphery. The taper of the top surface of the lower forming die 26 is set to 3 degrees, and the bottom surface of the upper forming die 13 is configured to fit into the top surface of the lower forming die 26. The spokes 3 are installed around the spoke positioning plate 28. As the hydraulic equipment drives the upper die 1 downward, the upper forming die 13 presses down on the spokes 3. Simultaneously, the guide post 25 slides down along the inner wall of the lower die pad 23 and gradually compresses the rectangular spring 24; until the spokes 3 and the rim 4 are press-fitted, the surface of the spokes 3 forms an inclined surface with a taper of 3 degrees.

[0042] Reference Figure 13 and Figure 14The specific implementation principle of this utility model is as follows: When it is necessary to press-fit the spokes 3 and the rim 4, the rim 4 is fitted onto the outer periphery of the rim positioning plate 29. Under the elastic force of each adjusting spring 222, the rim positioning plate 29 abuts against the inner wall of the rim 4, thereby completing the precise positioning and installation of the rim 4. Subsequently, the spokes 3 are fitted onto the outer periphery of the spoke positioning plate 28 and abut against the lower forming mold 26.

[0043] Subsequently, the hydraulic equipment drives the upper mold 1 downward, causing the bottom surface of the upper mold 13 to abut against the spoke 3. As the upper mold 13 continues to descend, the central guide post 25 slides down along the inner wall of the lower mold pad 23 and gradually compresses the rectangular spring 24 until the spoke 3 and the rim 4 are press-fitted. After the press-fitting is completed, the surface of the spoke 3 forms a 3-degree taper. Then, the spoke 3 and the rim 4 are double-sided welded to form two weld seams 5. After the spoke 3 and the rim 4 are welded together, the surface of the spoke 3 is prone to arching to the convex side due to the heat effect of welding. The slope formed by the press-fitting of the spoke 3 can neutralize the thermal deformation of the spoke 3, so that after the spoke 3 and the rim 4 are welded, the center hole, flatness, end runout and radial runout can still meet the standards.

[0044] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, shall be protected by the present invention.

Claims

1. A press fit steel wheel assembly mold characterized by: It includes an upper mold and a lower mold. The upper mold includes an upper mold base, an upper mold pad, and a forming upper mold. The upper mold pad is fixedly disposed at the center of the bottom end of the upper mold base, and the forming upper mold is fixedly disposed at the center of the bottom end of the upper mold pad. The lower mold includes a lower template, a lower mold pad, a rectangular spring, a central guide post, a forming lower mold, a positioning pin, a spoke positioning plate, and a rim positioning plate. The lower mold pad is fixedly mounted on the lower template, and the central guide post is slidably mounted within the lower mold pad. The rectangular spring is positioned between the central guide post and the lower template. The lower forming mold is fixedly set at the center of the top of the middle guide post. A pin groove is opened through the center of the lower forming mold. The bottom end of the positioning pin is embedded in the pin groove. The spoke positioning plate is installed on the lower forming mold and sleeved around the positioning pin. The rim positioning plate is sleeved around the lower mold pad. The top of the lower forming mold is set as an annular inclined surface, and the bottom surface of the upper forming mold can be fitted with the top surface of the lower forming mold.

2. The press-fitting steel wheel assembly mold according to claim 1, characterized in that: A positioning post is vertically fixed at the center of the lower template, and a spring groove is formed at the center of the bottom end of the middle guide post. The rectangular spring is sleeved around the positioning post and passes through the spring groove.

3. A press fit steel wheel assembly mold as defined in claim 1 wherein: A guide key is vertically fixed on one side of the central guide post, and a guide groove is vertically opened through the side wall of the lower mold pad, with the guide key being embedded in the guide groove.

4. A press fit steel wheel assembly jig according to claim 3 wherein: The middle guide post has an installation groove on its side wall, and the guide slide key is partially embedded in the installation groove. The guide slide key and the middle guide post are fixed together by bolts.

5. The press-fitting steel wheel assembly mold according to claim 1, characterized in that: A planar ring is provided between the lower template and the rim positioning plate. The planar ring is sleeved around the lower pad. Several receiving grooves are formed in the planar ring. Each receiving groove is provided with an adjusting spring. The top of each adjusting spring abuts against the rim positioning plate.

6. The press-fitting steel wheel assembly mold according to claim 1, characterized in that: The taper of the inclined surface at the top of the lower forming die is set to 3 degrees.

7. The press-fitting steel wheel assembly mold according to claim 1, characterized in that: The lower mold pad and the lower mold plate, as well as the forming lower mold and the middle guide post, are all fixed by bolts.

8. The press-fitting steel wheel assembly mold according to claim 1, characterized in that: A first positioning groove is formed at the bottom center of the upper mold base, and a first positioning platform is provided at the top center of the upper mold pad, with the first positioning platform being fitted into the first positioning groove.

9. A press fit steel wheel assembly mold in accordance with claim 1 wherein: A second positioning groove is provided at the center of the top of the upper mold, and a second positioning platform is provided at the center of the bottom of the upper mold pad. The second positioning platform is embedded in the second positioning groove.

10. A press fit steel wheel assembly mold in accordance with claim 1 wherein: The lower mold plate is vertically provided with several guide posts, and each guide post is surrounded by a guide post guard fixed to the lower mold plate. The bottom end of the upper mold base is vertically provided with several guide sleeves, each guide sleeve passing through the upper mold base, and the guide posts passing through the guide sleeves.

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