One-time forming riveting process for pressing crankset into crankset connecting piece

Abstract

A one-time forming riveting process for pressing a crankset into a crankset connecting piece belongs to the technical field of crankset manufacturing, and comprises the following steps: (1) producing the crankset connecting piece through a connecting piece mold; (2) the formed crankset connecting piece is conveyed to a crankset body production mold; the chain wheel body production die is provided with a press riveting station, and the chain wheel body and the chain wheel connecting piece are formed in a press riveting mode through the press riveting station. And (3) a formed product obtained after press riveting is input into a product receiving box. On one hand, assembly line automatic production of the crankset body and the crankset connecting piece can be achieved, on the other hand, assembly line production of a forming piece for connecting and fixing the crankset body and the crankset connecting piece can be achieved, the production efficiency is greatly improved, and the production difficulty and the production cost are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of crankset manufacturing, and in particular relates to a one-step forming riveting process for pressing a crankset into a crankset connector. Background Art

[0002] The most basic structure of a crankset is the combination of the crankset body and the crankset connector. In the existing technology, there are two ways to combine the crankset body and the crankset connector, one of which is welding, and the other is riveting and flanging. The defects of these two methods are:

[0003] 1. Welding method: (1) The product is prone to deformation; (2) Low production efficiency; (3) High cost.

[0004] 2. Flanging riveting method: (1) High product manufacturing cost; (2) Complex process.

[0005] The prior art still lacks a process capable of producing the crankset body and the crankset connectors by assembly line operation to connect and fix the molded parts. Summary of the invention

[0006] The invention discloses a one-step forming riveting process for pressing a crankset into a crankset connector, aiming to solve the problems 1 and 2 in the prior art, thereby realizing assembly line production of formed parts.

[0007] To achieve the above purpose, the technical solution of the present invention is:

[0008] A one-step riveting process for pressing a crankset into a crankset connector comprises the following steps:

[0009] (1) Producing a crankset connector by a connector mold;

[0010] (2) conveying the formed crankset connector to a crankset body production mold; the crankset body production mold is provided with a riveting station, through which the crankset body and the crankset connector are riveted into shape;

[0011] (3) The formed products after riveting are input into the product receiving box.

[0012] Preferably, in the step (2), the finished product output end of the connector mold is connected to a chainring connector slide plate, and the bottom end of the chainring connector slide plate is connected to a receiving box, which transfers the chainring connector to the vibration plate via a first conveyor belt, and the vibration plate inputs the chainring connector into the chainring body production mold via a conveying device.

[0013] Preferably, in step (2), the riveting station presses the free end of the crankshaft connector into the through hole reserved in the crankshaft body during the downward pressing of the punch, and then rivets the top of the free end through a rivet block, thereby firmly connecting the crankshaft body and the crankshaft connector through riveting.

[0014] Preferably, in step (2), the vibration plate is provided with an output guide rail, and the posture of the chainring connector is adjusted by the output guide rail and then input into a conveying device, and the conveying device maintains the posture of the chainring connector and inputs it into a riveting station of a chainring body production mold.

[0015] Preferably, in the step (2), a spiral track is provided in the vibration plate, and the chainring connector enters the bottom of the spiral track through the first conveyor belt, and the chainring connector collides with each other and with the inner wall of the spiral track. During this process, the chainring connector moves from bottom to top and gradually corrects its posture through continuous collisions in the spiral track. An output guide rail designed according to the outer dimensions of the chainring connector is provided in the upper section of the spiral track. The chainring connector adjusted to a set posture enters the output guide rail, and the chainring connector not adjusted to the set posture enters the descending section of the spiral track and is transported upward again through the spiral track. The chainring connector entering the output guide rail flows into the slide rail and is then sent into the chainring body production mold through the conveying device.

[0016] Preferably, in the step (2), the crankset body production mold is provided with an input rail groove, and three positioning components are provided at the riveting station for positioning the crankset connector, of which two positioning components are provided on the left and right sides, and one positioning component is provided on the rear side, forming a U-shaped limit frame as a whole, and the opening of the U-shaped limit frame is butt-jointed with the end of the input rail groove; the conveying device comprises a cylinder 1, a cylinder 2, a blanking seat, and an induction switch, the blanking seat is provided at the starting end of the input guide groove, the cylinder 2 is provided on the outside of the blanking seat, and the end of the piston rod of the cylinder 2 is connected with a feeding tongue 2 , the feeding tongue 2 is used to input the toothed disc connector in the blanking seat into the U-shaped limit frame along the input guide groove under the drive of the cylinder 2; the cylinder 1 is arranged on the side of the blanking seat close to the slide rail, the piston rod end of the cylinder 1 is connected with the feeding tongue 1, and a connecting plate is provided at the end of the slide rail, and the feeding tongue 1 is used to transport the slide rail to the toothed disc connector on the connecting plate to the blanking seat, and the blanking seat is provided with an induction switch on the side away from the cylinder 1, and the induction switch is connected to a control mechanism through a wire, and the control mechanism is configured to control the actions of the cylinder 1 and the cylinder 2;

[0017] When the chainring connector slides onto the connecting plate through the slide rail, cylinder one drives feeding tongue one to send it to the blanking seat. After the induction switch detects that the chainring connector is sent to the correct position of the blanking seat, cylinder two is actuated to send the chainring connector along the input track groove to the U-shaped limit frame formed by the positioning assembly through feeding tongue two, thereby completing the conveying and positioning of the chainring connector.

[0018] Preferably, in the step (2), after the crankset connector is positioned at the positioning assembly, the crankset body workpiece in the crankset body production mold is moved along the strip steel moving track to the specified position on the top of the crankset connector, and then the free end of the crankset connector is pressed into the through hole reserved in the crankset body by a punch, and then the top of the exposed free end is riveted by a rivet block, and the free end is expanded and interference fit with the through hole by riveting. The cross-section of the strip steel moving track from the position of the positioning assembly is an inverted convex structure, and the position where the crankset connector is positioned is located at the bottom of the strip steel moving track.

[0019] Preferably, in the step (2), after the riveting forming, the positioning assembly releases the positioning of the crankset connector, and the connection between the crankset body and the strip steel is cut off by the tooth cutting punch of the crankset body production mold. The molded product of the crankset body and the crankset connector continues to move forward in the strip steel moving track to the blanking hole position of the crankset body production mold, and falls onto the second conveyor belt through the blanking hole; the adjacent crankset connector at the rear is transported to the designated position where the positioning assembly is located; and the strip steel waste used to produce the crankset body is discharged through the waste discharge chute at the end of the crankset body production mold.

[0020] Preferably, in the step (3), the molded product is connected to the product receiving box via a second conveyor belt.

[0021] The beneficial effects of the one-step forming riveting process of the crankset press-into-crankset connector of the present invention are as follows:

[0022] 1. The present invention can realize the automated production of the crankset body and the crankset connector on one hand, and can realize the automated production of the molded parts that the crankset body and the crankset connector are connected and fixed on the other hand, which is specifically embodied in the following aspects: a. The crankset connector is produced by a connector mold assembly line, and the crankset body is produced by a crankset body production mold assembly line; b. By improving the riveting station in the crankset body production mold, it can be combined with the connector mold in combination with automated conveying means to form a complete set of automated production lines, thereby realizing the automated production of molded parts; through the above improvements, the production efficiency can be greatly improved.

[0023] 2. Compared with the existing technical means, the present invention can reduce the difficulty of riveting and ensure the connection quality between the crankset body and the crankset connector. At the same time, since no flanging is required, the material of the free end of the crankset connector can be saved to a great extent. There is no need to use additional equipment to connect the formed crankset body and the crankset connector, which saves equipment costs and simplifies the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 , a schematic diagram of the assembly line structure of the present invention.

[0025] Figure 2 , a schematic diagram of the structure of the crankset body and the crankset connecting piece during the riveting process of the present invention.

[0026] Figure 3 , a schematic diagram of the structure of the crankset body and the crankset connecting piece after riveting.

[0027] Figure 4 , schematic diagram of the three-dimensional structure of the crankset connector.

[0028] Figure 5-Figure 6 , schematic diagram of the vibration plate adjusting the posture of the chainring connector, where Figure 5 is the front view, Figure 6 This is a top view.

[0029] Figure 7 , schematic diagram of positioning the chainring connector inside the chainring body production mold, realizing riveting and final blanking.

[0030] Figure 8 , a schematic diagram of the structure of the conveying device of the present invention from a top view.

[0031] Fig. 9 , a schematic diagram of the side structure of the conveying device of the present invention.

[0032] In the figure: 1. Connector mold; 2. Slide plate of toothed disc connector; 3. Receiving box; 4. First conveyor belt; 5. Vibrating disc; 6. Conveying device; 7. Production mold of toothed disc body; 8. Waste discharge slide; 9. Second conveyor belt; 10. Product receiving box; 11. Toothed disc body; 12. Toothed disc connector; 13. Free end of toothed disc connector; 14. Spiral track; 15. Output guide rail; 16. Positioning assembly; 17. Strip moving track; 18. Tooth cutting punch; 19. Blanking hole position; 20. Riveting block; 21. Input track groove; 22. Slide rail; 23. Blanking seat; 24. Cylinder one; 25. Cylinder two; 26. Feed tongue two; 27. Feed tongue one; 28. Connecting plate; 29. ​​Induction switch. DETAILED DESCRIPTION

[0033] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0034] The following embodiments may be understood as individually expressing a part of a local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.

[0035] Example 1

[0036] A one-step riveting process for pressing a tooth plate into a tooth plate connector, such as Figure 1-9 As shown, the following steps are included:

[0037] (1) producing a toothed disc connector by a connector mold 1;

[0038] (2) conveying the formed crankset connector 12 to the crankset body production mold 7; the crankset body production mold 7 is provided with a riveting station, through which the crankset body 11 and the crankset connector 12 are riveted into shape;

[0039] (3) The formed product after riveting is input into the product receiving box 10.

[0040] In this embodiment, Figure 1 , 2 As shown in FIG. 4 , the connector mold 1 is used to produce the crankset connector 12. The connector mold 1 and the crankset connector 12 are prior art products, and the detailed structure is not described in detail. After the crankset connector 12 enters the crankset body production mold 7, it is riveted with the crankset body 11 to form a molded product, and the molded product is input into the product receiving box 10, so that the assembly line automation operation is realized.

[0041] Example 2

[0042] Based on Example 1, this embodiment discloses:

[0043] In the step (2), Figure 1-6 As shown, the finished product output end of the connector mold 1 is connected to a chainring connector slide plate 2, and the bottom end of the chainring connector slide plate 2 is connected to a receiving box 3. The receiving box 3 transmits the chainring connector 12 to the vibration plate 5 through the first conveyor belt 4, and the vibration plate 5 inputs the chainring connector into the chainring body production mold 7 through the conveying device 6.

[0044] like Figure 7As shown, during the pressing process of the punch (not shown) of the riveting station, the free end 13 of the crankset connector is pressed into the through hole reserved in the crankset body 11, and then the top of the free end 13 of the crankset connector is riveted by the riveting block 20, so that the crankset body 11 and the crankset connector 12 are firmly connected by riveting.

[0045] Example 3

[0046] Based on Example 2, this embodiment discloses:

[0047] In the step (2), Figure 5 , 6 As shown, the vibration plate 5 is provided with a spiral track 14, the toothed disc connector 12 enters the bottom of the spiral track through the first conveyor belt 4, and the toothed disc connectors 11 collide with each other and with the inner wall of the spiral track. During this process, the toothed disc connector 11 moves from bottom to top, and gradually corrects its posture through continuous collisions in the spiral track 14. An output guide rail designed according to the outer dimensions of the toothed disc connector is provided on the upper section of the spiral track, as shown in FIG. Figure 6 As shown, the crankset connector 12 adjusted to the set posture enters the output guide rail 15, and the crankset connector 12 not adjusted to the set posture re-enters the downward section of the spiral track 14 and is transported upward through the spiral track again, and the crankset connector entering the output guide rail 15 flows into the slide rail 22, and is then sent into the crankset body production mold 7 through the conveying device 6. The slide rail 22 is still designed according to the shape and size of the crankset connector to maintain the posture of the crankset connector.

[0048] Example 4

[0049] Based on Example 3, this embodiment discloses:

[0050] In the step (2), Figure 7-9As shown, the crankset body production mold 7 is provided with an input rail groove 21, and three positioning components 16 are provided at the riveting station for positioning the crankset connector 12. Among the three positioning components 16: two positioning components are provided on the left and right sides, and one positioning component is provided on the rear side, forming a U-shaped limit frame as a whole, and the opening of the U-shaped limit frame is butted with the end of the input rail groove 21; the conveying device 6 includes a cylinder 1 24, a cylinder 2 25, a blanking seat 23, and an induction switch 29. The blanking seat 23 is provided at the starting end of the input guide groove 21, the cylinder 2 25 is provided on the outside of the blanking seat, the piston rod end of the cylinder 2 is connected with a feeding tongue 26, and the The feeding tongue 26 is used to input the toothed disc connector 12 in the blanking seat 23 into the U-shaped limit frame along the input guide groove 21 under the drive of the cylinder 2; the cylinder 1 24 is arranged on the side of the blanking seat close to the slide rail 22, and the end of the piston rod of the cylinder 1 is connected with the feeding tongue 1 27, and a connecting plate is provided at the end of the slide rail 22. The feeding tongue 1 27 is used to transport the slide rail 22 to the toothed disc connector on the connecting plate 28 and transport it to the blanking seat. The side of the blanking seat away from the cylinder 1 is provided with an induction switch 29, and the induction switch 29 is connected to a control mechanism through a wire, and the control mechanism is configured to control the actions of the cylinder 1 and the cylinder 2;

[0051] When the chainring connector 12 slides onto the connecting plate 28 through the slide rail 22, the cylinder 1 24 drives the feeding tongue 1 27 to send it to the blanking seat 23. After the induction switch detects that the chainring connector is sent to the correct position of the blanking seat, the cylinder 2 25 is actuated to send the chainring connector 12 along the input track groove 21 to the U-shaped limit frame formed by the positioning assembly through the feeding tongue 2 26, thereby completing the transportation and positioning of the chainring connector.

[0052] Example 5

[0053] Based on Example 4, this embodiment discloses:

[0054] like Figure 7 As shown, in the step (2), after the crankset connector 12 is positioned at the positioning assembly, the crankset body 11 workpiece in the crankset body production mold 7 is moved along the steel strip moving track to the specified position on the top of the crankset connector, and then the free end of the crankset connector is pressed into the through hole reserved in the crankset body by a punch, and then the top of the exposed free end is riveted by the rivet block 20, and the free end is expanded and interference fit with the through hole by riveting. The cross-section of the steel strip moving track 17 starting from the position of the positioning assembly is an inverted convex structure (to facilitate the riveting of the crankset connector and the crankset body and the movement of the riveted product), and the position of the crankset connector is located at the bottom of the steel strip moving track.

[0055] In this embodiment, the strip steel is the material for producing the crankset body, and the crankset body production mold 7 is a common technology, the principle of which is to input the strip steel into the preset strip steel moving track in the mold, and then use a common punching tool to punch holes or teeth. The present invention is different from the crankset body production mold 7 in that it is improved based on the basic structure of the crankset body production mold 7, and a groove is opened under the strip steel moving track to accommodate the limit assembly and the crankset connector and provide space for the movement of the finished product (that is, the cross-section of the strip steel moving track 17 is an inverted convex structure, such as Figure 6 A top view is given), the open end of the U-shaped limit frame formed by the limit assembly is connected to the input track groove, the starting end of the input track groove is connected to the blanking seat, a connecting plate is arranged on one side of the blanking seat, and then combined with the cooperation of cylinder 1, cylinder 2, induction switch and control mechanism, and by arranging a punch and a rivet block in the chainring body production mold 7, the assembly line operation of connecting and fixing the chainring connector to the chainring body is realized.

[0056] Example 6

[0057] Based on Example 5, this embodiment discloses:

[0058] In the step (2), Figure 7 As shown, after riveting, the positioning assembly releases the positioning of the crankset connector (the positioning assembly can be driven by a cylinder), and the connection between the crankset body and the strip steel is cut off by the tooth cutting punch 18 of the crankset body production mold 7. The molded product of the crankset body and the crankset connector continues to move forward in the strip steel moving track 17 to the blanking hole position 19 of the crankset body production mold, and falls onto the second conveyor belt 9 through the blanking hole, and the adjacent crankset connector at the rear is transported to the designated position at the positioning assembly; the strip steel waste used to produce the crankset body is discharged through the waste discharge chute 8 at the end of the crankset body production mold 7.

[0059] Example 7

[0060] Based on Example 6, this embodiment discloses that, Figure 1 As shown, in the step (3), the molded product is connected to the product receiving box 10 via the second conveyor belt 9.

Claims

1. A one-step riveting process for pressing a crankset into a crankset connector, characterized by comprising the following steps: (1) Producing a crankset connector by a connector mold; (2) conveying the formed crankset connector to a crankset body production mold; the crankset body production mold is provided with a riveting station, through which the crankset body and the crankset connector are riveted into shape; (3) The formed products after riveting are input into the product receiving box.

2. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 1, characterized in that: In the step (2), the finished product output end of the connector mold is connected to a chainring connector slide plate, and the bottom end of the chainring connector slide plate is connected to a receiving box, which transfers the chainring connector to the vibration plate via a first conveyor belt, and the vibration plate inputs the chainring connector into the chainring body production mold via a conveying device.

3. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 2, characterized in that: In the step (2), the riveting station presses the free end of the crankshaft connector into the through hole reserved in the crankshaft body during the downward pressing of the punch, and then rivets the top of the free end through the riveting block, so that the crankshaft body and the crankshaft connector are firmly connected through riveting.

4. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 3, characterized in that: In the step (2), the vibration plate is provided with an output guide rail, and the posture of the chainring connector is adjusted by the output guide rail and then input into the conveying device. The conveying device maintains the posture of the chainring connector and inputs it into the riveting station of the chainring body production mold.

5. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 4, characterized in that: In the step (2), a spiral track is provided in the vibration plate, and the chainring connector enters the bottom of the spiral track through the first conveyor belt. The chainring connector collides with each other and with the inner wall of the spiral track. During this process, the chainring connector moves from bottom to top and gradually corrects its posture through continuous collisions in the spiral track. An output guide rail designed according to the outer dimensions of the chainring connector is provided in the upper section of the spiral track. The chainring connector adjusted to the set posture enters the output guide rail, and the chainring connector not adjusted to the set posture enters the descending section of the spiral track and is transported upward again through the spiral track. The chainring connector entering the output guide rail flows into the slide rail and is then sent into the chainring body production mold through the conveying device.

6. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 5, characterized in that: In the step (2), the crankset body production mold is provided with an input rail groove, and three positioning components are provided at the riveting station for positioning the crankset connector, of which two positioning components are provided on the left and right sides, and one positioning component is provided on the rear side, forming a U-shaped limit frame as a whole, and the opening of the U-shaped limit frame is butted against the end of the input rail groove; the conveying device comprises a cylinder 1, a cylinder 2, a blanking seat, and an induction switch, the blanking seat is provided at the starting end of the input guide groove, the cylinder 2 is provided on the outside of the blanking seat, the piston rod end of the cylinder 2 is connected with a feeding tongue 2, and the The feeding tongue 2 is used to input the toothed disc connector in the blanking seat into the U-shaped limit frame along the input guide rail groove under the drive of the cylinder 2; the cylinder 1 is arranged on the side of the blanking seat close to the slide rail, the piston rod end of the cylinder 1 is connected with the feeding tongue 1, and a connecting plate is provided at the end of the slide rail. The feeding tongue 1 is used to transport the slide rail to the toothed disc connector on the connecting plate and transport it to the blanking seat. The blanking seat is provided with an induction switch on the side away from the cylinder 1, and the induction switch is connected to a control mechanism through a wire, and the control mechanism is configured to control the actions of the cylinder 1 and the cylinder 2; When the chainring connector slides onto the connecting plate through the slide rail, cylinder one drives feeding tongue one to send it to the blanking seat. After the induction switch detects that the chainring connector is sent to the correct position of the blanking seat, cylinder two is actuated to send the chainring connector along the input track groove to the U-shaped limit frame formed by the positioning assembly through feeding tongue two, thereby completing the conveying and positioning of the chainring connector.

7. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 6, characterized in that: In the step (2), after the crankset connector is positioned at the positioning assembly, the crankset body workpiece in the crankset body production mold is moved along the strip steel moving track to the specified position on the top of the crankset connector. Then, the free end of the crankset connector is pressed into the through hole reserved in the crankset body by a punch, and then the top of the exposed free end is riveted by a rivet block. The free end is expanded by riveting and interference fits with the through hole. The cross-section of the strip steel moving track from the position of the positioning assembly is an inverted convex structure, and the position where the crankset connector is positioned is located at the bottom of the strip steel moving track.

8. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 7, characterized in that: In the step (2), after the riveting forming, the positioning assembly releases the positioning of the crankset connector, and the connection between the crankset body and the strip steel is cut off by the tooth cutting punch of the crankset body production mold. The molded product of the crankset body and the crankset connector continues to move in the strip steel moving track to the blanking hole position of the crankset body production mold, and falls onto the second conveyor belt through the blanking hole; the adjacent crankset connector at the rear is transported to the designated position where the positioning assembly is located; the strip steel waste used to produce the crankset body is discharged through the waste discharge chute at the end of the crankset body production mold.

9. A one-step riveting process for pressing a crankset into a crankset connector as claimed in claim 8, characterized in that: In the step (3), the molded product is connected to the product receiving box via a second conveyor belt.

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