Spoke air hole chamfering die

Abstract

The utility model discloses a spoke air hole chamfering die. The spoke air hole chamfering die comprises an upper die, an upper punch, a protective sleeve, a lower die, a lower punch and a spoke installation assembly. The upper punch is detachably installed at the bottom end of the upper die, the protective sleeve is detachably installed at the bottom end of the upper punch, and the protective sleeve is made of metal with the hardness smaller than that of steel and iron materials. The lower punch is installed on the lower die and arranged under the upper punch, and the peripheral side of the top end of the lower punch is arranged to be in an arc shape used for forming an air hole chamfer. The spoke mounting assembly is mounted on the lower die and used for mounting and positioning a spoke, and an air hole of the spoke is located between the upper punch and the lower punch. The air hole chamfering device has the advantages that the protective sleeve made of metal materials with small hardness is arranged at the bottom end of the upper punch, the protective sleeve is driven by the upper punch to move downwards and abut against the surface of the spoke, and imprint cannot be generated on the surface of the spoke when air hole chamfering is carried out on the spoke.

Description

Technical Field

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

[0002] With the rapid development of the automobile industry, the product quality of wheel spokes has also attracted much attention. The spoke air holes are an important factor affecting the performance of the spokes. At present, the wheel factories process the spoke air holes by first fixing the center hole of the wheel spoke on the positioning protrusion of the punching die, and then punching the spokes with a single or double hole. However, in order to ensure the smoothness and aesthetics of the spoke surface and improve the fatigue mechanical properties of the wheel, the edges of the air holes on the spokes need to be ground or chamfered.

[0003] The upper punch of the existing spoke air hole chamfering die is made of steel material, and the upper punch directly chamfers the surface of the spoke, so that the surface of the spoke will be impressed during the chamfering, and improvement is needed. Utility Model Content

[0004] The utility model aims to provide an air hole chamfering die which can prevent imprints from being generated on the surface of the spoke when the air hole of the spoke is chamfered.

[0005] The utility model proposes a spoke air hole chamfering die, comprising: an upper die, an upper punch, a protective cover, a lower die, a lower punch and a spoke mounting assembly; the upper punch is detachably mounted on the bottom end of the upper die, the protective cover is detachably mounted on the bottom end of the upper punch, and the protective cover is made of metal with a hardness lower than that of steel; the lower punch is mounted on the lower die, and the lower punch is arranged directly below the upper punch, and the top circumference of the lower punch is arranged to be an arc for forming the air hole chamfer; the spoke mounting assembly is mounted on the lower die, and the spoke mounting assembly is used to install and position the spoke so that the air hole of the spoke is located between the upper punch and the lower punch.

[0006] Preferably, the protective sleeve is made of brass material, and the bottom end of the protective sleeve is configured as a curved surface adapted to the shape of the spokes.

[0007] Preferably, the upper mold includes an upper mold plate and an upper mold fixing part, the upper mold fixing part is fixed under the upper mold plate, and the upper mold fixing part is provided with an upper mounting through hole with openings at both ends in the vertical direction; the upper part of the upper punch is passed through the upper mounting through hole and is fixed to the upper punch by fasteners.

[0008] Preferably, the lower die includes a lower die plate, a lower die seat, a lower die fixing part and a rebound spring;

[0009] The lower die base is fixed on the lower die plate, the lower die fixing piece is fixedly arranged on the lower die base, and the lower die fixing piece is provided with a lower mounting through hole with two ends opened in the vertical direction;

[0010] The lower part of the lower punch is inserted into the lower mounting through hole, and a receiving groove is provided at the bottom end of the lower punch, in which the rebound spring is installed.

[0011] Preferably, the upper mold further comprises an upper mold pad, and the upper mold pad is fixedly arranged between the upper mold plate and the upper mold fixing member;

[0012] The lower die also includes a lower die pad, which is fixed between the lower die fixing member and the lower die seat.

[0013] Preferably, the spoke mounting assembly comprises:

[0014] A slide seat, the slide seat is located at one side of the lower die seat and can slide up and down along the side end of the lower die seat;

[0015] A turntable is rotatably connected to the slide seat, a positioning protrusion is provided at the center of the turntable, and a positioning pin is formed on the peripheral side of the upper surface of the turntable;

[0016] The return spring is connected between the bottom end of the slide seat and the lower mold plate, and the return spring is compressed when the slide seat slides downward along the side end of the lower mold seat.

[0017] Preferably, a sliding pressure plate is fixedly provided on the side of the slide seat facing the lower die seat, and a sliding groove is opened on the surface of the lower die seat facing the slide seat, the height dimension of the sliding groove is greater than the height dimension of the sliding pressure plate, the sliding pressure plate is embedded in the sliding groove, and limiting plates are fixedly provided on both sides of the sliding groove, and the sliding pressure plate is limited between the lower die seat and the limiting plates.

[0018] Preferably, the top end of the slide seat is arranged as an inclined surface which slopes downward from the outside to the inside.

[0019] Preferably, a mounting groove is provided on the upper portion of the protective cover, a second mounting hole is provided on the side wall of the protective cover, and the second mounting hole is communicated with the mounting groove;

[0020] A first mounting hole is formed on the lower side wall of the upper punch, and the lower portion of the upper punch is inserted into the mounting groove. Mounting bolts are screwed into the first mounting hole and the second mounting hole to connect the upper punch and the protective cover.

[0021] Preferably, a first anti-rotation surface is provided in the upper mounting through hole, and a second anti-rotation surface matching the first anti-rotation surface is provided on the upper portion of the upper punch;

[0022] A third anti-rotation surface is arranged in the lower mounting through hole, and a fourth anti-rotation surface matched with the third anti-rotation surface is arranged at the lower part of the lower punch.

[0023] From the above description of the utility model, it can be seen that the utility model has the following beneficial effects:

[0024] 1. A brass head is detachably installed at the bottom of the upper punch. The hardness of the brass head is lower than that of steel. When the upper punch moves downward to perform chamfering of the air holes on the spokes, it ensures that there is no embossing on the spoke surface.

[0025] 2. A positioning protrusion is formed at the center position of the turntable, and a positioning pin is provided on one side of the positioning protrusion on the turntable. When the spoke is positioned and installed, the positioning protrusion is embedded in the middle hole of the spoke, and the positioning pin is embedded in the screw hole of the spoke. Not only is the positioning accurate, but it can also be applied to the positioning and installation of various types of spokes.

[0026] 3. A return spring is arranged at the bottom end of the slide seat and the sliding block. After the chamfering of the air hole is completed, the slide seat and the sliding pressure plate are raised under the action of the return spring, so that the lower punch is separated from the air hole of the spoke, so as to facilitate the disassembly of the spoke.

[0027] 4. A rebound spring is installed in the receiving groove of the lower punch, which will rebound after each chamfering. In this way, workers can know whether the air hole is stuck in the lower punch by feel, which improves the efficiency of workers' chamfering and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a spoke air hole chamfering mold in an embodiment;

[0029] Figure 2 is a rear view of a spoke air hole chamfering mold of an embodiment;

[0030] Figure 3 is a top view of a spoke air hole chamfering mold in an embodiment;

[0031] Figure 4 It is an embodiment Figure 3 Middle AA section view;

[0032] Figure 5 It is an embodiment Figure 3 Middle BB section view;

[0033] Figure 6 2 is a schematic structural diagram of an upper mold fixing member of an embodiment;

[0034] Figure 7 It is a schematic structural diagram of the punch in the embodiment;

[0035] Figure 8 2 is a schematic structural diagram of a lower mold fixing member of an embodiment;

[0036] Fig. 9 is a schematic structural diagram of the lower punch in the embodiment;

[0037] Fig.10 It is a structural schematic diagram of the slide and the turntable of the embodiment;

[0038] Fig.11 is a schematic diagram of the embodiment after the workpiece is installed;

[0039] Fig.12 It is a schematic diagram of the structure of the punch, brass head and mounting bolts in the embodiment;

[0040] Fig.13 2. It is a schematic structural diagram of the lower die base and the sliding groove of the embodiment;

[0041] Fig.14 Schematic diagram of the structure of the slide seat, the sliding pressure plate and the return spring of the embodiment.

[0042] 1. The upper punch; 11. The first mounting hole; 12. The protective cover; 121. The second mounting hole; 122. The mounting groove; 13. The mounting bolt; 14. The second anti-rotation surface; 2. The upper mold 2; 21. The upper mold pad; 22. The upper mold fixing piece; 221. The fastener; 222. The upper mounting through hole; 223. The first anti-rotation surface; 3. The upper mold plate; 4. The lower punch; 41. The accommodating groove; 42. The fourth anti-rotation surface; 5. The lower mold; 51. The lower mold pad; 511. The rebound spring; 52. The lower mold fixing piece; 521. The lower mounting through hole; 522. The third anti-rotation surface; 6. The lower mold seat; 61. The sliding groove; 62. The limit plate; 7. The lower mold plate; 8. The spoke mounting assembly; 81. The turntable; 811. The positioning protrusion; 812. The positioning pin; 82. The slide seat; 83. The reset spring; 84. The sliding pressure plate. DETAILED DESCRIPTION

[0043] 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 1-14 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.

[0044] Reference Figure 1-Figure 9A spoke air hole chamfering die comprises an upper punch 1 and an upper die 2, wherein the upper die 2 comprises an upper die pad 21, an upper die fixing part 22 and an upper die plate 3, wherein the upper die pad 21 is fixedly arranged at the bottom center position of the upper die plate 3, the upper die fixing part 22 is fixedly arranged at the bottom end of the upper die pad 21, and the upper die fixing part 22 is provided with an upper mounting through hole 222 in the vertical direction, and one end of the upper punch 1 is inserted into the upper mounting through hole 222 of the upper die fixing part 22. In order to avoid relative rotation between the upper punch 1 and the upper die fixing part 22, a first anti-rotation surface 223 is arranged in the upper mounting through hole 222, and a second anti-rotation surface 14 matched with the first anti-rotation surface 223 is arranged on the upper part of the upper punch 1; when the upper punch is inserted into the upper mounting through hole 222 of the upper die fixing part 22, a fastener 221 is screwed on the side surface of the upper die fixing part 22, so that the fastener 221 and the upper punch 1 are tightly fixed against each other, and the fastener 221 can be set as a bolt, so that the upper punch 1 is firmly installed in the upper die fixing part 22 and is convenient for disassembly and replacement.

[0045] It also includes a lower punch 4 and a lower die 5. The lower die 5 includes a lower die pad 51, a lower die fixing member 52, a lower die seat 6 and a lower die plate 7. The lower die seat 6 is fixedly arranged at the center of the lower die plate 7. The lower die pad 51 is fixedly arranged on the lower die seat 6. The lower die fixing member 52 is fixedly arranged on the lower die pad 51 and a through lower mounting through hole 521 is arranged in the lower die fixing member 52 in the vertical direction. A third anti-rotation surface 522 is arranged in the lower mounting through hole 521, and a fourth anti-rotation surface 42 adapted to the third anti-rotation surface 521 is arranged at the lower part of the lower punch 4 to avoid relative rotation between the lower punch 4 and the lower die fixing member 52; the lower punch 4 is inserted into the lower mounting through hole 521 of the lower die fixing member 52, and the top peripheral side of the lower punch 4 is arranged in an arc shape to facilitate the chamfering of the spoke.

[0046] Reference Fig.10 and Fig.11 In order to accurately chamfer the air holes of the spokes, a spoke installation assembly 8 is provided on one side of the lower die seat 6. The spoke installation assembly 8 includes a slide 82 and a turntable 81, wherein the slide 82 is provided above the lower die plate 7, the top surface of the slide 82 is provided as an inclined surface inclined toward the lower die direction, and the turntable 81 is rotatably connected to the top of the slide 82. A positioning protrusion 811 corresponding to the middle hole of the spoke is formed at the center of the turntable 81, and a positioning pin 812 corresponding to the screw hole of the spoke is provided on the circumferential side of the surface of the turntable 81. When the air hole of the spoke needs to be chamfered, the spoke is installed on the turntable 81, so that the positioning protrusion 811 on the turntable 81 is embedded in the middle hole of the spoke, and the positioning pin 812 on the turntable 81 is embedded in the screw hole of the spoke, thereby accurately positioning the spoke on the turntable 81.

[0047] Reference Figure 5 , Fig. 9and Fig.12 After the spoke is positioned and installed on the turntable 81, one side of the spoke is located between the upper punch 1 and the lower punch 4, and the upper punch 1 and the lower punch 4 are molded together to chamfer the air holes of the spoke. In order to enable the upper punch 1 and the lower punch 4 to accurately chamfer the air holes of the spoke, a rebound spring 511 is fixedly provided on the lower die pad 51, and a corresponding receiving groove 41 is provided at the bottom end of the lower punch 4, so that when the lower punch 4 is embedded in the lower die fixing member 52, the end of the rebound spring 511 away from the lower die pad 51 is inserted into the receiving groove 41 and fixed between the lower punch 4, and the lower punch 4 is inserted into the air hole on one side of the spoke under the action of the rebound spring 511, thereby accurately positioning the air holes of the spoke with the lower punch 4 and the upper punch 1.

[0048] When the air holes of the spokes are chamfered, the upper punch 1 is lowered and inserted into the air holes of the spokes and is molded with the lower punch 4. While the upper punch 1 is chamfering the air holes of the spokes, the lower punch 4 is driven to squeeze the rebound spring 511. In order to prevent the upper punch 1 from imprinting the surface of the spokes when the air holes of the spokes are chamfered, a protective cover 12 is provided at the bottom end of the lower punch 1. The protective cover 12 can be selected as a brass head with a hardness lower than that of steel, and the bottom end of the brass head is curved. A mounting groove 122 is provided in the protective cover 12, so that the bottom end of the lower punch 1 is inserted into the mounting groove 122 of the protective cover 12. In order to fix the brass head and the upper punch 1, a first mounting hole 11 is provided on the side surface of the upper punch 1, and a second mounting hole 121 is provided on the side surface of the brass head. After the brass head is set on the periphery of the upper punch 1, mounting bolts 13 are screwed into the first mounting hole 11 and the second mounting hole 121, so that the brass body and the upper punch 1 are not only firmly fixed but also easy to disassemble.

[0049] Reference Fig.13 and Fig.14After the air hole chamfering die is used to chamfer the spoke, in order to facilitate the lower punch 4 to separate from the air hole of the spoke so as to disassemble the spoke, the spoke mounting assembly 8 also includes a plurality of return springs 83. A sliding plate 84 is fixedly arranged on the side of the slide seat 82 facing the lower die seat 6. The bottom end of the sliding plate 84 is flush with the bottom end of the slide seat 82. The plurality of return springs 83 are respectively arranged between the lower die plate 7 and the slide seat 82, or between the lower die plate 7 and the sliding plate 84. In order to keep the slide seat 82 stable during the lifting process, a sliding groove 61 is correspondingly formed on the side of the lower die seat 6 facing the slide seat 82. The height dimension of the sliding groove 61 is set to "H", and the height dimension of the sliding plate 84 is set to "D", and the height dimension "H" of the sliding groove 61 is greater than the height dimension "D" of the sliding plate 84. The sliding pressure plate 84 is inserted into the sliding groove 61, and a limit plate 62 is fixedly arranged on the side of the lower die seat 6 facing the slide seat 82. The limit plates 62 are located on both sides of the sliding groove 61 to limit the limit plates 62 between the lower die seat 6 and the limit plates 62. The upper punch 1 drives the spoke and the slide seat 82 downward to compress the return spring 83. After the air hole chamfering of the spoke is completed, the slide seat 82 and the spoke are raised under the action of the return spring 83. During the process of the spoke being raised, the air hole of the spoke is separated from the lower punch 4, so that the spoke can be removed from the air hole chamfering die.

[0050] The specific implementation principle of the embodiment of the present application is: when it is necessary to perform air hole chamfering on the spoke, select the upper punch 1 corresponding to the model of the air hole of the spoke to be processed, insert the selected upper punch 1 into the upper die fixing part 22 and install and fix it with the upper die fixing part 22, and select a brass head sleeve corresponding to the model of the upper punch 1 to be arranged on the outer periphery of the bottom end of the upper punch 1, and screw the mounting bolt 13 into the second mounting hole 121 of the brass head and the first mounting hole 11 of the upper punch 1, so that the brass head and the upper punch 1 are fixedly installed.

[0051] The spoke to be processed is installed on the turntable 81, so that the positioning protrusion 811 is embedded in the middle hole of the spoke, and the positioning pin 812 on the turntable 81 is embedded in the screw hole of the spoke, so that the spoke is accurately positioned and installed on the turntable 81. At this time, it is ensured that the top part of the lower punch 4 is inserted into the air hole of the spoke under the action of the rebound spring 511. As the upper punch 1 moves downward, the brass head abuts against the surface of the spoke and presses the spoke downward, so that the lower punch 4 is completely inserted into the air hole of the spoke, thereby completing the chamfering of the spoke air hole. While pressing the spoke downward, the slide 82 compresses the reset spring 83. Then the upper punch 1 moves upward, and the slide 82 drives the spoke upward under the elastic force of the reset spring 83. At this time, the sliding pressure plate 84 fixed to the slide 82 slides upward in the sliding groove 61 of the lower die seat 6, so that the spoke and the lower punch 4 are separated from each other, so as to facilitate the removal of the spoke from the turntable 81.

[0052] 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 air hole chamfering mold, characterized in that: include: Upper die, upper punch, protective cover, lower die, lower punch and spoke mounting assembly; The upper punch is detachably mounted on the bottom end of the upper die, and the protective cover is detachably mounted on the bottom end of the upper punch, wherein the protective cover is made of a metal having a hardness lower than that of steel; The lower punch is installed on the lower die, and the lower punch is arranged directly below the upper punch, and the top peripheral side of the lower punch is arranged to be an arc shape for forming the chamfer of the air hole; The spoke installation assembly is installed on the lower die, and the spoke installation assembly is used to install and position the spoke so that the air hole of the spoke is located between the upper punch and the lower punch.

2. A spoke air hole chamfering mold according to claim 1, characterized in that: The protective sleeve is made of brass material, and the bottom end of the protective sleeve is arranged to be a curved surface adapted to the shape of the spoke.

3. The spoke air hole chamfering mold according to claim 1, characterized in that: The upper die includes an upper die plate and an upper die fixing part, wherein the upper die fixing part is fixed below the upper die plate, and the upper die fixing part is provided with an upper mounting through hole with openings at both ends in the vertical direction; the upper part of the upper punch is passed through the upper mounting through hole and is fixed to the upper punch by a fastener.

4. A spoke air hole chamfering mold according to claim 3, characterized in that: The lower die comprises a lower die plate, a lower die seat, a lower die fixing part and a rebound spring; The lower die base is fixed on the lower die plate, the lower die fixing piece is fixedly arranged on the lower die base, and the lower die fixing piece is provided with a lower mounting through hole with two ends opened in the vertical direction; The lower part of the lower punch is inserted into the lower mounting through hole, and a receiving groove is provided at the bottom end of the lower punch, in which the rebound spring is installed.

5. A spoke air hole chamfering mold according to claim 4, characterized in that: The upper mold also includes an upper mold pad, which is fixedly arranged between the upper mold plate and the upper mold fixing member; The lower die also includes a lower die pad, which is fixed between the lower die fixing member and the lower die seat.

6. A spoke air hole chamfering mold according to claim 4, characterized in that: The spoke mounting assembly comprises: A slide seat, the slide seat is located at one side of the lower die seat and can slide up and down along the side end of the lower die seat; A turntable is rotatably connected to the slide seat, a positioning protrusion is provided at the center of the turntable, and a positioning pin is formed on the peripheral side of the upper surface of the turntable; The return spring is connected between the bottom end of the slide seat and the lower mold plate, and the return spring is compressed when the slide seat slides downward along the side end of the lower mold seat.

7. A spoke air hole chamfering mold according to claim 6, characterized in that: A sliding pressure plate is fixedly arranged on the side of the slide seat facing the lower die seat, and a sliding groove is opened on the surface of the lower die seat facing the slide seat. The height dimension of the sliding groove is greater than the height dimension of the sliding pressure plate. The sliding pressure plate is embedded in the sliding groove, and limiting plates are fixedly arranged on both sides of the sliding groove. The sliding pressure plate is limited between the lower die seat and the limiting plates.

8. The spoke air hole chamfering mold according to claim 7, characterized in that: The top end of the slide seat is arranged as an inclined surface which is inclined downward from the outside to the inside.

9. The spoke air hole chamfering mold according to claim 1, characterized in that: The upper part of the protective cover is provided with a mounting groove, and the side wall of the protective cover is provided with a second mounting hole, and the second mounting hole is communicated with the mounting groove; A first mounting hole is formed on the lower side wall of the upper punch, and the lower portion of the upper punch is inserted into the mounting groove. Mounting bolts are screwed into the first mounting hole and the second mounting hole to connect the upper punch and the protective cover.

10. The spoke air hole chamfering mold according to claim 4, characterized in that: A first anti-rotation surface is arranged in the upper mounting through hole, and a second anti-rotation surface matching the first anti-rotation surface is arranged on the upper portion of the upper punch; A third anti-rotation surface is arranged in the lower mounting through hole, and a fourth anti-rotation surface matched with the third anti-rotation surface is arranged at the lower part of the lower punch.

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