Hollow pin riveting head die and hollow pin riveting head device for chain

Abstract

The utility model relates to the field of chain machining, and particularly discloses a hollow pin riveting head die and a hollow pin riveting head device for a chain. The hollow pin rivet head die comprises a forming block and a guide nail, a forming female die is arranged on the forming block, and the guide nail is arranged in the center of the forming female die. A plurality of forming surfaces are arranged in the forming female die, are planes and are annularly distributed around the guide nail; and the forming surface is inclined inwards from the edge of the forming female die to the center. According to the hollow pin riveting head die, the hollow pin shaft can be positioned, deformation of the pin shaft is guided in the head riveting process, and the head riveting quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of chain processing, in particular to a hollow pin rivet head mold and a hollow pin rivet head device for a chain. Background Art

[0002] A chain is a chain-shaped mechanical component used for mechanical transmission, offering reliable transmission and high load transfer. A chain typically consists of inner links, outer plates, and pins. The inner links are connected by outer plates and pins, which are typically riveted.

[0003] The chain pins come in two types: hollow and solid. The riveting operation of solid pins is relatively simple, while the riveting of hollow pins is more difficult and is prone to deformation, shrinkage and other problems, which affect the quality of the chain.

[0004] This application is aimed at the above-mentioned problems in the hollow pin riveting process, and provides a hollow pin rivet head mold to ensure the smooth progress of the hollow pin riveting process. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a hollow pin rivet head mold and a hollow pin rivet head device for a chain, which can position the hollow pin shaft and guide the deformation of the pin shaft during the riveting process, thereby improving the quality of the rivet head.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a hollow pin rivet head mold, including a forming block and a guide pin, the forming block is provided with a forming die, and the guide pin is arranged in the center of the forming die; a plurality of forming surfaces are provided in the forming die, and the forming surfaces are plane and distributed in a ring around the guide pin; the forming surfaces are arranged to be inclined inward from the edge of the forming die to the center.

[0007] When processing the rivet head, the guide pin is first inserted into the pin shaft to position the subsequent relative movement between the pin shaft and the forming block. At the same time, the guide pin can provide internal support for the pin shaft to prevent the pin shaft from deforming inward and shrinking.

[0008] Because each forming surface is flat and arranged in a ring around the guide pin, forming a pyramidal shape, when the flat pin end contacts the forming surface, it initially forms a multi-point contact pattern. Compared to surface contact, point contact has a smaller contact area and a correspondingly higher pressure. The pin requires a higher initial deformation pressure during the rivet head, allowing for smooth initial deformation and providing excellent guidance for deformation, ensuring the quality of the rivet head.

[0009] Preferably, the forming block and the guide pin are integrally provided.

[0010] Preferably, the forming block is provided with a mounting through hole, the mounting through hole is located in the center of the forming die, and the mounting through hole is provided with a limiting countersunk hole at one end away from the forming die; the guide pin is separately provided with the forming block, one end of the guide pin is provided with a stopper, the guide pin is provided through the mounting through hole, and the stopper matches the limiting hole;

[0011] It also includes a mold handle and a fixing seat, and the mold handle and the fixing seat clamp the forming block.

[0012] The forming blocks and guide pins can be replaced to meet the rivet head requirements of pins of different specifications, and the maintainability is very good.

[0013] Preferably, the number of the forming surfaces is 3 to 5.

[0014] Preferably, the end of the guide pin extends out of the forming die.

[0015] This ensures that the guide pin is inserted into the pin before the forming block contacts the chain, thereby improving positioning reliability.

[0016] A hollow pin rivet head device for a chain comprises a base plate, a rivet head assembly and a chain feeding assembly, wherein the base plate is provided with a chain feeding channel, and the chain feeding channel is provided with a rivet head station;

[0017] The rivet head assembly includes an upper die and a lower die, the upper die and the lower die are arranged opposite to each other at the rivet head station, and the upper die and the lower die are both hollow pin rivet head dies as described above;

[0018] The chain feeding assembly is used to drive the chain to move along the chain feeding channel.

[0019] Preferably, the chain feeding assembly includes a tooth plate, a longitudinal drive assembly and a transverse drive assembly, and the tooth plate is located on one side of the chain feeding channel; the longitudinal drive assembly includes a longitudinal drive unit, and the longitudinal drive unit is used to drive the tooth plate to move in a direction perpendicular to the chain feeding channel; the transverse drive assembly includes a transition slider and a transverse drive unit, and the longitudinal drive member is arranged on the transition slider, and the transverse drive unit is used to drive the transition slider to move along the extension direction of the chain feeding channel.

[0020] Preferably, a damping assembly is further included, wherein the damping assembly includes an elastic pressure head and an elastic member, the elastic pressure head is connected to the bottom plate via the elastic member, and the elastic pressure head is located on one side of the chain feeding channel.

[0021] The damping assembly limits the chain while also allowing it to pass smoothly. The chain is kept straight between the damping assembly and the tooth plate, which reliably maintains the chain's position and ensures smooth automated chain feeding and rivet head processing.

[0022] Preferably, the rivet head assembly further includes a riveting drive mechanism, and the riveting drive mechanism is used to drive the upper die and the lower die to move up and down respectively.

[0023] During the riveting process, the chain and the pin remain stationary, and the riveting operation is completed by the upper and lower dies moving up and down relative to each other. After the riveting process is completed, the upper and lower dies can be reset and separated from the pin without affecting the feed movement of the chain.

[0024] Preferably, the lower mold is fixedly arranged on the bottom plate; a floating mechanism is also provided on the bottom plate, and the chain feeding channel is arranged on the bottom plate through the floating mechanism.

[0025] During the riveting process, the lower die can be fixed. When the upper die presses down, the chain floats downward synchronously, cooperating with the lower die to complete the riveting process. After the riveting is completed, the upper die returns to its original position, and the chain separates from the lower die under the push of the floating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a hollow pin rivet head device for a chain according to this embodiment;

[0027] Figure 2 This is a top view of the hollow pin rivet head device for the chain according to this embodiment;

[0028] Figure 3 Schematic diagram of the structure of the hollow pin rivet head mold in the hollow pin rivet head device for chains in this embodiment;

[0029] Figure 4 This is an exploded view of a hollow pin rivet head mold in a hollow pin rivet head device for a chain according to this embodiment;

[0030] Figure 5 2 is a cross-sectional view of a hollow pin rivet head mold in a hollow pin rivet head device for a chain according to this embodiment;

[0031] Figure 6 for Figure 5 A partial enlarged view of point A in the middle;

[0032] Figure 7 This is a schematic structural diagram of the cooperation between the forming block and the guide pin in the hollow pin rivet head device for the chain in this embodiment. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0034] like Figure 1 and Figure 2 As shown, a hollow pin rivet head device for a chain includes a base plate 3, a rivet head assembly and a chain feeding assembly 2. The base plate 3 is provided with a chain feeding channel 4, and the chain feeding channel 4 is provided with a rivet head station.

[0035] like Figure 1 and Figure 2 As shown, the rivet head assembly includes an upper die 1 and a lower die, and the upper die 1 and the lower die are opposite to each other at the rivet head station, and the upper die 1 and the lower die are both hollow pin rivet head molds. Figure 3-Figure 7 As shown, the hollow pin rivet head mold includes a forming block 12 and a guide pin 13. The forming block 12 is provided with a forming die 121, and the guide pin 13 is located at the center of the forming die 121. The forming die 121 is provided with three to five forming surfaces 1211. The forming surfaces 1211 are planar and distributed in an annular manner around the guide pin 13. The forming surfaces 1211 are arranged inwardly from the edge to the center of the forming die 121.

[0036] The forming block 12 and the guide pin 13 may be integrally provided or separately provided.

[0037] like Figure 3-Figure 5 As shown, specifically, when the guide pin 13 and the forming block 12 are separately provided, the forming block 12 is provided with a mounting through hole, the mounting through hole is located in the center of the forming die 121, and the mounting through hole is provided with a limiting countersunk hole at one end away from the forming die 121. The guide pin 13 and the forming block 12, one end of the guide pin 13 is provided with a stopper, the guide pin 13 is provided through the mounting through hole, and the stopper matches the limiting hole. It also includes a mold handle 11 and a fixing seat 14, and the mold handle 11 and the fixing seat 14 are provided to clamp the forming block 12. The forming block 12 and the guide pin 13 can be replaced to meet the rivet head requirements of pins of different specifications, and the maintainability is very good.

[0038] As a specific implementation method, Figure 6 As shown, the end of the guide pin 13 extends out of the forming die 121 to ensure that the guide pin 13 is inserted into the pin before the forming block 12 contacts the chain 5, thereby improving positioning reliability.

[0039] When processing the rivet head, the guide pin 13 is first inserted into the pin shaft to position the subsequent relative movement between the pin shaft and the forming block 12. At the same time, the guide pin 13 can provide internal support for the pin shaft to prevent the pin shaft from deforming inward and shrinking.

[0040] Because each forming surface 1211 is planar and arranged in a ring around the guide pin 13, forming a pyramidal surface, when the planar pin end contacts the forming surface 1211, it initially forms a multi-point contact pattern. Compared to surface contact, point contact has a smaller contact area and a correspondingly higher pressure. The initial deformation pressure required by the pin during the rivet head is relatively high, allowing the pin to begin deforming smoothly, effectively guiding the deformation and ensuring the quality of the rivet head.

[0041] like Figure 1 and Figure 2 As shown, the chain feeding assembly 2 is used to drive the chain to move along the chain feeding channel 4. Specifically, the chain feeding assembly 2 includes a tooth plate 24, a longitudinal drive assembly 23, and a transverse drive assembly 22. The tooth plate 24 is located on one side of the chain feeding channel 4. The longitudinal drive assembly 23 includes a longitudinal drive unit, which is used to drive the tooth plate 24 to move in a direction perpendicular to the chain feeding channel 4. The transverse drive assembly 22 includes a transition slider and a transverse drive unit. The longitudinal drive member is provided on the transition slider, and the transverse drive unit is used to drive the transition slider to move along the extension direction of the chain feeding channel 4.

[0042] like Figure 1 and Figure 2 As shown, the chain further includes a damping assembly 21, which comprises an elastic pressure head and an elastic member. The elastic pressure head is connected to the base plate 3 via the elastic member and is located on one side of the chain feed channel 4. The damping assembly 21 provides a certain position limit for the chain while also allowing the chain to pass smoothly. The portion of the chain between the damping assembly 21 and the tooth plate 24 is kept straight, which reliably maintains the chain's condition and ensures smooth automated chain feeding and rivet head processing.

[0043] As a specific embodiment, the rivet head assembly further includes a riveting drive mechanism, and the riveting drive mechanism is used to drive the upper die 1 and the lower die to move up and down respectively.

[0044] During the riveting process, the chain 5 and the pin remain stationary, and the riveting operation is completed by the upper die 1 and the lower die moving up and down relative to each other. After the riveting process is completed, the upper die 1 and the lower die can be reset and separated from the pin without affecting the feeding movement of the chain.

[0045] As another specific embodiment, the lower mold is fixedly arranged on the bottom plate 3; a floating mechanism is also provided on the bottom plate 3, and the chain feeding channel 4 is arranged on the bottom plate 3 through the floating mechanism.

[0046] During the riveting process, the lower die can be fixed. When the upper die 1 is pressed down, the chain floats downward synchronously, cooperating with the lower die to complete the riveting process. After the riveting is completed, the upper die 1 returns to its original position, and the chain separates from the lower die under the push of the floating mechanism.

[0047] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hollow pin rivet head mold, characterized by: It includes a forming block and a guide pin. The forming block is provided with a forming die, and the guide pin is arranged at the center of the forming die. The forming die is provided with a plurality of forming surfaces, which are planes and are distributed in a ring around the guide pin. The forming surfaces are arranged to be inclined inward from the edge to the center of the forming die.

2. The hollow pin rivet head mold according to claim 1, characterized in that: The forming block and the guide pin are integrally arranged.

3. The hollow pin rivet head mold according to claim 1, characterized in that: The forming block is provided with a mounting through hole, the mounting through hole is located in the center of the forming die, and the mounting through hole is provided with a limiting countersunk hole at one end away from the forming die; the guide pin is provided separately from the forming block, one end of the guide pin is provided with a stopper, the guide pin is provided through the mounting through hole, and the stopper matches the limiting hole; It also includes a mold handle and a fixing seat, and the mold handle and the fixing seat clamp the forming block.

4. The hollow pin rivet head mold according to claim 1, characterized in that: The number of the forming surfaces is 3 to 5.

5. The hollow pin rivet head mold according to claim 1, characterized in that: The end of the guide pin extends out of the forming die.

6. A hollow pin rivet head device for a chain, characterized by: It includes a base plate, a rivet head assembly and a chain feeding assembly, wherein the base plate is provided with a chain feeding channel, and the chain feeding channel is provided with a rivet head station; The rivet head assembly includes an upper die and a lower die, the upper die and the lower die are arranged opposite to each other at the rivet head station, and the upper die and the lower die are hollow pin rivet head dies according to any one of claims 1 to 5; The chain feeding assembly is used to drive the chain to move along the chain feeding channel.

7. The hollow pin rivet head device according to claim 6, characterized in that: The chain feeding assembly includes a tooth plate, a longitudinal drive assembly and a transverse drive assembly, and the tooth plate is located on one side of the chain feeding channel; the longitudinal drive assembly includes a longitudinal drive unit, and the longitudinal drive unit is used to drive the tooth plate to move in a direction perpendicular to the chain feeding channel; the transverse drive assembly includes a transition slider and a transverse drive unit, and the longitudinal drive assembly is arranged on the transition slider, and the transverse drive unit is used to drive the transition slider to move along the extension direction of the chain feeding channel.

8. The hollow pin rivet head device according to claim 7, characterized in that: It also includes a damping component, which includes an elastic pressure head and an elastic member. The elastic pressure head is connected to the bottom plate through the elastic member, and the elastic pressure head is located on one side of the chain feeding channel.

9. The hollow pin rivet head device according to any one of claims 6 to 8, characterized in that: The rivet head assembly further comprises a riveting drive mechanism, which is used to drive the upper die and the lower die to move up and down respectively.

10. The hollow pin rivet head device according to any one of claims 6 to 8, characterized in that: The lower die is fixedly arranged on the bottom plate; a floating mechanism is also provided on the bottom plate, and the chain feeding channel is arranged on the bottom plate through the floating mechanism.

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