Riveting tool and riveting method

Abstract

The invention provides a riveting tool and a riveting method, and relates to the technical field of valve device production, according to the riveting tool, axial movement of an ejector rod is converted into lateral sliding of a sliding block through an obliquely-arranged driving face, the lateral sliding of the sliding block is used for abutting against a to-be-riveted part to generate expansion deformation, riveting is achieved, and in the riveting process, the riveting efficiency is greatly improved. The riveting tool does not elastically deform, so that the riveting tool is not prone to damage, and the consistency of the riveting amount of riveted products is easily guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of valve device production, and particularly relates to a riveting tooling and a riveting method. Background Art

[0002] Common riveting tooling rivets the valve body and the connecting pipe of the valve device together. During riveting, the riveting tooling undergoes elastic deformation. After riveting is completed, the riveting tooling resets. Repeated elastic deformation causes the riveting tooling to be easily damaged, and the riveting tooling needs to be frequently replaced, resulting in a high assembly cost of the valve device. Moreover, after repeated elastic deformation, the deformation ability of the riveting tooling decreases, resulting in poor consistency of the riveting amount of the valve device.

[0003] In view of this, how to improve the riveting tooling is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] To solve the above technical problems, this application provides a riveting tooling, which includes:

[0005] A joint, the joint is provided with a jacking portion and a plurality of mounting hole portions. The jacking portion extends along the axial direction of the joint. Each mounting hole portion is sequentially arranged at intervals in the circumferential direction of the joint. The mounting hole portion is located on the side of the jacking portion. One side of the mounting hole portion close to the jacking portion is communicated with the jacking portion, and a through port portion is provided on the side of the mounting hole portion far from the jacking portion;

[0006] A slider, one slider is assembled in each mounting hole portion. The slider can slide laterally along the mounting hole portion, and one side of the slider far from the jacking portion can pass through the through port portion;

[0007] A ejector rod, the ejector rod includes a tip portion. The tip portion is inserted into the jacking portion. The tip portion can move axially along the jacking portion. A driving surface is provided on the outer periphery of the tip portion. The driving surface is inclined relative to the central axis of the jacking portion. The driving surface can abut against one side of the slider close to the jacking portion to drive the slider to slide laterally along the mounting hole portion.

[0008] This application also provides a riveting method, which is realized based on the riveting tooling provided by this application. The riveting method includes the following steps:

[0009] Insert a first workpiece to be riveted into a second workpiece to be riveted, and insert the joint and the slider of the riveting tooling into the first workpiece to be riveted;

[0010] Then drive the ejector rod of the riveting tooling to move forward along the jacking portion of the joint until the slider reaches the target sliding amount;

[0011] Then drive the ejector rod to move in the reverse direction along the jacking hole portion, so as to reset the slider in the direction close to the jacking hole portion.

[0012] The riveting tooling provided by this application uses an inclined driving surface to convert the axial movement of the ejector rod into the lateral sliding of the slider, and uses the lateral sliding of the slider to press against the workpiece to be riveted to cause expansion deformation to achieve riveting. During the riveting process, the riveting tooling does not undergo elastic deformation, making the riveting tooling not easily damaged and facilitating ensuring the consistency of the riveting amount of the riveted product. Description of the Drawings

[0013] Figure 1 It is a perspective view of the first embodiment of the riveting tooling provided by this application;

[0014] Figure 2 It is a perspective view of the joint, ejector rod and slider in the first embodiment;

[0015] Figure 3 is Figure 2 a cross-sectional view of

[0016] Figure 4 It is a perspective view of the joint in the first embodiment;

[0017] Figure 5 It is a perspective view of a single slider in the first embodiment;

[0018] Figure 6 It is a cross-sectional view of the ejector rod in the first embodiment;

[0019] Figure 7 It is a perspective view of the joint in the second embodiment of the riveting tooling provided by this application;

[0020] Figure 8 It is a perspective view of a single slider in the second embodiment;

[0021] Figure 9 It is a perspective view of using the riveting tooling shown in the first embodiment to rivet the valve body and the pipe joint;

[0022] Figure 10 is Figure 9 a partial cross-sectional view of

[0023] The reference numerals are explained as follows:

[0024] 1 Riveting tooling; 11 Joint, 111 Socket part, 112 Mounting hole part, 1121 Top wall part, 1122 Bottom wall part, 113 Step surface, 114 Limiting part; 12 Slide block, 121 Fitting surface, 122 Pressing surface, 123 Top end surface, 124 Bottom end surface, 125 Chamfer part; 13 Ejector rod, 131 Tip part, 1311 Driving surface, 132 Shank part, 1321 Axial hole part, 1322 Radial threaded hole part; 14 First positioning part; 15 Second positioning part; 16 Power element; 17 Bracket.

[0025] 2 Valve body.

[0026] 3 Connecting pipe. Specific implementation manner

[0027] In order to enable those skilled in the art of the present technology to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0028] The present application provides a riveting tooling 1.

[0029] As Figures 1 - 8 shown, the riveting tooling 1 provided by the present application includes a joint 11, a slide block 12 and an ejector rod 13.

[0030] The joint 11 is provided with a socket part 111 and a plurality of mounting hole parts 112. The socket part 111 extends along the axial direction of the joint 11. Each mounting hole part 112 is sequentially arranged at intervals in the circumferential direction of the joint 11. More specifically, each mounting hole part 112 can be arranged at equal angular intervals on the entire circumference of the joint 11.

[0031] The mounting hole part 112 is located on the side of the socket part 111. The side of the mounting hole part 112 close to the socket part 111 is communicated with the socket part 111. The side of the mounting hole part 112 far from the socket part 111 is provided with a through port.

[0032] One slide block 12 is assembled in each mounting hole part 112. The slide block 12 can slide laterally along the mounting hole part 112, and the side of the slide block 12 far from the socket part 111 can pass through the through port.

[0033] The ejector rod 13 includes a tip part 131. The tip part 131 is inserted into the socket part 111. The tip part 131 can move axially along the socket part 111. A driving surface 1311 is provided on the outer periphery of the tip part 131. The driving surface 1311 is inclined relative to the central axis of the socket part 111. The driving surface 1311 can abut against the side of the slide block 12 close to the socket part 111 to drive the slide block 12 to slide laterally along the mounting hole part 112.

[0034] More specifically, the joint 11, the slide block 12 and the ejector rod 13 can all be made of steel material, for example, 65Mn spring steel material.

[0035] The present application also provides a riveting method, which is implemented based on the riveting tooling 1 provided by the present application. As Figure 9 and Figure 10 shown, the riveting method includes the following steps:

[0036] Insert the first workpiece to be riveted into the second workpiece to be riveted, and insert the joint 11 and the slider 12 of the riveting tooling 1 into the first workpiece to be riveted.

[0037] Then drive the ejector rod 13 of the riveting tooling 1 to move forward along the insertion hole portion 111 (move upward in the figure). At this time, the driving surface 1311 will gradually push against the slider 12 to slide toward the side away from the insertion hole portion 111, so that the side of the slider 12 away from the insertion hole portion 111 gradually passes through the through hole portion to press against the first workpiece to be riveted to expand and deform, so that the first workpiece to be riveted is gradually riveted tightly to the second workpiece to be riveted. This process continues until the slider 12 reaches the target sliding amount.

[0038] Then drive the tip portion 131 to move backward along the insertion hole portion 111 (move downward in the figure) so that the slider 12 can reset toward the direction close to the insertion hole portion 111.

[0039] More specifically, in the illustrated embodiment, the first workpiece to be riveted is the connecting pipe 3 of the valve device, and the second workpiece to be riveted is the valve body 2 of the valve device. After the connecting pipe 3 and the valve body 2 are riveted, welding can be further performed along the circumferential direction of the connecting pipe 2.

[0040] More specifically, the reverse movement distance of the tip portion 131 can be controlled so that the tip portion 131 is not lower than the top hole of the insertion hole portion 111 after the reverse movement. For example, the tip portion 131 can be higher than the top hole of the insertion hole portion 111 by more than 2 mm after the reverse movement, so as to avoid the problem that the tip portion 131 is not easy to move between the sliders 12 during the re-riveting due to the slider 12 resetting too much toward the direction close to the insertion hole portion 111.

[0041] As can be seen from the above description, the riveting tooling 1 provided by the present application converts the axial movement of the ejector rod 13 into the lateral sliding of the slider 12 by using the inclined driving surface 1311, and uses the lateral sliding of the slider 12 to press against the workpiece to be riveted to expand and deform to achieve riveting. During the riveting process, the riveting tooling 1 does not undergo elastic deformation, so that the riveting tooling 1 is not easily damaged and it is easy to ensure the consistency of the riveting amount of the riveted product.

[0042] In addition, after the connecting pipe 3 and the valve body 2 of the valve device are riveted by using the above-mentioned riveting tooling 1, the gap between the connecting pipe 3 and the valve body 2 is small, which makes it easy to operate during the subsequent circumferential welding along the connecting pipe 3, and the weld width after welding is small. Therefore, the connection reliability is high.

[0043] In one embodiment, the slope of the driving surface 1311 is configured such that 6° ≤ α ≤ 8°. Within this range, the stroke of the ejector rod 13 does not need to be too large to enable the slider 12 to reach the target sliding amount, which is conducive to ensuring a high riveting efficiency. Moreover, when the ejector rod 13 moves a small distance, the sliding amount of the slider 12 will not be too large, so that the slider 12 can gradually reach the target sliding amount smoothly without suddenly exceeding the target sliding amount.

[0044] In one embodiment, the maximum sliding amount of the slider 12 is designed to be not less than 0.8 mm. This range can ensure sufficient riveting amount, thereby ensuring riveting tightness. More specifically, taking the illustrated perspective as an example, when the tip 131 moves upward from below the slider 12, the upper end of the driving surface 1311 first abuts against the slider 12, then the lower end of the driving surface 1311 abuts against the slider 12, and then the lower end of the driving surface 1311 separates from the slider 12. The maximum sliding amount of the slider 12 refers to the lateral sliding amount of the slider 12 within the stroke from when the upper end of the driving surface 1311 abuts against the slider 12 to when the lower end of the driving surface 1311 separates from the slider 12. The maximum sliding amount of the slider 12 is determined by the length and slope of the driving surface 1311.

[0045] In one embodiment, the driving surface 1311 is a conical driving surface. In the illustrated first and second embodiments, the driving surface 1311 is a conical driving surface. The conical driving surface is relatively convenient to machine and can abut against multiple sliders 12 simultaneously.

[0046] In one embodiment, the driving surface 1311 is an inclined plane driving surface. When it is an inclined plane driving surface, multiple inclined plane driving surfaces need to be arranged at intervals along the circumference of the joint 11, and each inclined plane driving surface correspondingly abuts against a slider 12.

[0047] In one embodiment, a mating surface 121 is provided on the side of the slider 12 close to the jack portion 111. The mating surface 121 is inclined relative to the central axis of the jack portion 111, and the inclination direction and slope are the same as those of the driving surface 1311. The mating surface 121 is tangent to or fits with the driving surface 1311. For a conical driving surface, to make the mating surface 121 fit with it, the mating surface 121 needs to be an arc surface. Making the mating surface 121 tangent to or fit with the driving surface 1311 can enable the axial movement of the ejector rod 13 to be more smoothly converted into the lateral sliding of the slider 12.

[0048] More specifically, the mating surface 121 can be an inclined plane or an arc surface. For example, in the illustrated first embodiment, the mating surface 121 is an inclined plane, and in the illustrated second embodiment, the mating surface 121 is an arc surface.

[0049] In one embodiment, a pressing surface 122 is provided on a side of the slider 12 away from the jack portion 111, and the pressing surface 122 is an arc surface. During riveting, the pressing surface 122 presses the workpiece to be riveted, and setting the pressing surface 122 as an arc surface is not likely to damage the workpiece to be riveted.

[0050] More specifically, in the illustrated first embodiment, the slider 12 is a hexahedron, and the above-mentioned mating surface 121 and pressing surface 122 are two side surfaces of the hexahedron. In the illustrated second embodiment, the slider 12 is a cone, and the above-mentioned mating surface 121 and pressing surface 122 both belong to the conical surface of the cone.

[0051] In one embodiment, the top end surface 123 of the slider 12 and the bottom end surface 124 of the slider 12 are respectively in guiding fit with the top wall portion 1121 and the bottom wall portion 1122 of the mounting hole portion 112. The guiding fit clearance is preferably 0.05 mm - 0.15 mm, so as to guide the lateral sliding of the slider 12 and improve the sliding smoothness of the slider 12.

[0052] In one embodiment, a chamfer portion 125 is provided between the pressing surface 122 on the side of the slider 12 away from the jack portion 111 and the top end surface 123 of the slider 12. In this way, during riveting, the chamfer portion 125 can play a guiding role, making it easier for the joint 11 assembled with the slider 12 to be inserted into the first workpiece to be riveted. More specifically, the chamfer portion 125 can be a rounded chamfer or an inclined chamfer.

[0053] In one embodiment, a step surface 113 is provided on the outer periphery of the joint 11. During riveting, one end of the first workpiece to be riveted abuts against the step surface 113 (see Figure 10 , one end of the sleeve 3 abuts against the step surface 113), thereby limiting the depth of insertion of the joint 11 into the first workpiece to be riveted.

[0054] In one embodiment, as Figure 4 or Figure 7 shown, in the axial direction of the joint 11, the top wall portion 1121 of the mounting hole portion 112 is higher than the step surface 113, and the bottom wall portion 1122 of the mounting hole portion 112 is lower than the step surface 113. More specifically, from the illustrated perspective, the top wall portion 1121 of the mounting hole portion 112 is located above the step surface 113, and the bottom wall portion 1122 of the mounting hole portion 112 is located below the step surface 113. With this design, during riveting, the port of the first workpiece to be riveted can also be effectively pressed, thereby improving the riveting tightness.

[0055] In one embodiment, the joint 11 can also be provided with a limiting portion 114. During riveting, the joint 11 is also inserted into the second workpiece to be riveted and is in limiting fit with the second workpiece to be riveted (see Figure 10 , the limiting portion 114 of the joint 11 is in limiting fit with the valve body 2), thereby limiting the relative position of the joint 11 and the second workpiece to be riveted.

[0056] In one embodiment, the ejector rod 13 further includes a handle portion 132. The tip portion 131 and the handle portion 132 are separately provided and detachably assembled together. In this way, after the tip portion 131 is worn, only the tip portion 131 needs to be replaced without replacing the handle portion 132.

[0057] More specifically, as Figure 6 shown, the diameter of the handle portion 132 is larger than that of the tip portion 131. An axial hole portion 1321 and a radial threaded hole portion 1322 can be provided on the handle portion 132. One end of the tip portion 131 is inserted into the axial hole portion 1321, and a screw (not shown in the figure) is connected in the radial threaded hole portion 1322 to press the outer periphery of the tip portion 131.

[0058] In one embodiment, both the tip portion 131 and the slider 12 have magnetism, and the tip portion 131 and the slider 12 attract each other. With such a design, when the tip portion 131 moves in the reverse direction, it can attract each slider 12 to reset in the direction close to the jack portion 111. More specifically, a magnetizer can be used to strongly magnetize the tip portion 131 and the slider 12 so that they have magnetism.

[0059] In one embodiment, the riveting tooling 1 further includes a first positioning portion 14, a second positioning portion 15, a power element 16 and a bracket 17. The first positioning portion 14 is used to position the first workpiece to be riveted. The second positioning portion 15 is used to position the second workpiece to be riveted. The first positioning portion 14, the second positioning portion 15 and the joint 11 are all fixed to the bracket 17. The power element 16 is connected to the ejector rod 13 to drive the ejector rod 13 to move axially along the jack portion 111.

[0060] More specifically, the power element 16 can be a cylinder, and the piston rod of the cylinder is connected to the handle portion 132 of the ejector rod 13.

[0061] More specifically, when the first workpiece to be riveted is the connecting pipe 3 of the valve device, the first positioning portion 14 can include a positioning column adapted to the inner circumference of the connecting pipe 3. During riveting, one end of the connecting pipe 3 is sleeved outside the positioning column, and the other end of the connecting pipe 3 is inserted into the valve body 2 of the valve device. When the second workpiece to be riveted is the valve body 2 of the valve device, the first positioning portion 14 can include a positioning groove adapted to the outer circumference of the valve body 2, and the valve body 2 is supported on the first positioning portion 14 and sinks into the positioning groove.

[0062] The above embodiments can be freely combined without conflict.

[0063] The above uses specific examples to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A riveting tooling, characterized in that, The riveting tooling includes: A joint, the joint is provided with a jack portion and a plurality of mounting hole portions. The jack portion extends along the axial direction of the joint. Each of the mounting hole portions is sequentially arranged at intervals in the circumferential direction of the joint. The mounting hole portions are located on the side of the jack portion. One side of the mounting hole portion close to the jack portion is communicated with the jack portion, and a through port portion is provided on the side of the mounting hole portion far from the jack portion; Sliders, one slider is assembled in each of the mounting hole portions. The slider can slide laterally along the mounting hole portion. One side of the slider far from the jack portion can pass through the through port portion; A ejector rod, the ejector rod includes a tip portion. The tip portion is inserted into the jack portion. The tip portion can move axially along the jack portion. A driving surface is provided on the outer periphery of the tip portion. The driving surface is inclined relative to the central axis of the jack portion. The driving surface can abut against one side of the slider close to the jack portion to drive the slider to slide laterally along the mounting hole portion.

2. The riveting tooling according to claim 1, wherein The range of the slope α of the driving surface is: 6° ≤ α ≤ 8°.

3. The riveting tooling according to claim 1, wherein The driving surface is a conical driving surface.

4. The riveting tooling according to claim 1, characterized in that, One side of the slider close to the jack portion is provided with a mating surface. The mating surface is inclined relative to the central axis of the jack portion and has the same inclination direction and slope as the driving surface. The mating surface is tangent to or abuts against the driving surface.

5. The riveting tooling according to claim 4, wherein One side of the slider far from the jack portion is provided with a pressing surface. The pressing surface is an arc surface. During riveting, the workpiece to be riveted is pressed by the pressing surface.

6. The riveting tooling according to claim 5, characterized in that, The slider is a hexahedron, and the mating surface and the pressing surface are respectively two side surfaces of the hexahedron; or the slider is a cone, and the mating surface and the pressing surface both belong to the outer conical surface of the cone.

7. The riveting tooling according to any one of claims 1-6, characterized in that, The maximum lateral sliding amount of the slider is not less than 0.8 mm.

8. The riveting tooling according to any one of claims 1-6, characterized in that A step surface is provided on the outer periphery of the joint. During riveting, the workpiece to be riveted abuts against the step surface.

9. The riveting tooling according to claim 8, wherein Axially on the joint, the top wall portion of the mounting hole portion is higher than the step surface, and the bottom wall portion of the mounting hole portion is lower than the step surface.

10. The riveting tooling according to any one of claims 1-6, characterized in that, One side of the slider far from the jack portion is provided with a pressing surface, and a chamfer portion is provided between the top surface of the slider and the pressing surface of the slider.

11. The riveting tooling according to any one of claims 1-6, characterized in that, The ejector rod further includes a handle portion. The tip portion and the handle portion are separately provided and can be detachably assembled together.

12. The riveting tooling according to any one of claims 1-6, characterized in that, Both the tip portion and the slider have magnetism, and the tip portion and the slider attract each other.

13. The riveting tooling according to any one of claims 1-6, characterized in that, The riveting tooling further includes a first positioning portion, a second positioning portion, a power element and a bracket. The first positioning portion, the second positioning portion and the joint are all fixed on the bracket. The first positioning portion and the second positioning portion are respectively used for positioning a first workpiece to be riveted and a second workpiece to be riveted. The power element is connected to the ejector rod to drive the ejector rod to move axially along the jack portion.

14. Riveting method, characterized in that, Based on the riveting tooling according to any one of claims 1-13, the riveting method includes the following steps: Insert the first workpiece to be riveted into the second workpiece to be riveted, and insert the joint and the slider of the riveting tooling into the first workpiece to be riveted; Then drive the ejector rod of the riveting tooling to move forward along the jack portion of the joint until the slider reaches the target sliding amount; Then drive the ejector rod to move reversely along the jacking hole portion, so as to reset the slider in the direction close to the jacking hole portion.

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