Workpiece high-strength riveting structure
By setting an auxiliary riveting part on the workpiece and using the inverted area design, the problem of gap between the welded column melting end and the workpiece is solved, the stability and strength of the connection between the injection molded parts is improved, and the problem of poor connection stability in the prior art is solved. .
Patent Information
- Application Number
- CN202421046781.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In the existing injection molded parts connection structure, gaps are prone to occur between the melted end of the welding column and the workpiece, resulting in insufficient connection stability and strength, especially in the high-demand automotive field, which will lead to abnormal noise and structural damage.
An auxiliary riveting part is provided on the second workpiece. The auxiliary riveting part is located on one side of the welding column. The end of the welding column and the auxiliary riveting part are connected by melting to ensure that the melted part of the welding column can be effectively fixed, and through multiple auxiliary riveting parts The uniform layout and inverted area design enhance the connection strength.
It effectively avoids the gap problem caused by insufficient melting length of welding columns, improves the stability and strength of workpiece connections, and ensures higher connection accuracy and use stability.
Smart Images
Figure CN222201743U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molded parts connection structures, in particular to a workpiece high-strength riveting structure. Background Art
[0002] At present, in the connection and fixing structure of injection molded parts, welding columns are usually used to fix two workpieces. Specifically, a welding column is integrally formed on the first workpiece, and a through hole matching the welding column is set on the second workpiece. When fixing the two workpieces, the first workpiece and the second workpiece are fitted together, and the welding column is passed through the through hole on the second workpiece. Then, the end of the welding column protruding from the through hole is melted by a melting device, and the melted part of the welding column forms an end head with a diameter larger than the diameter of the through hole, so that the second workpiece is limited and fixed between the first workpiece and the end head, thereby realizing the mutual fixation between the first workpiece and the second workpiece.
[0003] Although the existing welding column can connect two workpieces, in actual operation, when the end of the welding column protruding from the second workpiece is melted by a melting device to obtain a terminal, due to the influence of factors such as melting time and melting length, it is very easy for a gap to appear between the terminal and the second workpiece. Although the second workpiece can be fixed to the first workpiece by the terminal in this case, due to the gap between the terminal and the second workpiece, the second workpiece may shake and collide with the first workpiece during use, which is not allowed in products with high connection stability between the first and second workpieces, such as in the automotive field. This situation will cause problems such as abnormal noise during use and easy damage to the connection structure. Therefore, it is necessary to improve the existing workpiece structure to improve the accuracy, stability and strength of the workpiece connection. Utility Model Content
[0004] The utility model aims to provide a high-strength riveting structure for workpieces, so as to solve the problems of low connection strength and poor stability between workpieces connected and fixed by welding columns in the prior art.
[0005] To solve the above problems, the utility model adopts the following technical solution: a high-strength riveting structure for workpieces, comprising a first workpiece and a second workpiece that cooperate with each other, the first workpiece is provided with a welding column, the second workpiece is provided with a through hole that cooperates with the welding column, and the side of the second workpiece away from the first workpiece is provided with an auxiliary riveting portion that protrudes beyond the second workpiece, and the auxiliary riveting portion is located on one side of the welding column.
[0006] The principle and beneficial effects of the present solution are as follows: in the present application, an auxiliary riveting portion is provided outside the second workpiece, the auxiliary riveting portion protrudes out of the side of the second workpiece away from the first workpiece, and when the welding column is inserted into the via hole and the first workpiece and the second workpiece are fitted together, the melting tool in the prior art can be used to melt the end of the welding column to form an end cap. In the present application, since the auxiliary riveting portion is located on one side of the welding column, when the welding column is melted to form an end cap, in the process of the end of the welding column being reduced in length due to melting to form the end cap, the melted portion of the welding column can not only be connected and fixed to the side of the second workpiece away from the first workpiece, but also can be melted and connected and fixed to the auxiliary riveting portion.
[0007] On the one hand, since the auxiliary riveting portion protrudes beyond the second workpiece, when the end of the welding column is melted and connected to the second workpiece, the molten part of the welding column will first contact and melt with the auxiliary riveting portion, thereby effectively avoiding the situation where a gap appears between the end and the second workpiece due to insufficient melting length of the welding column, and effectively improving the stability of the connection between the first workpiece and the second workpiece.
[0008] On the other hand, in the prior art, the end of the welding column after melting is generally in the shape of a mushroom head with a large top and a small bottom. When the end is connected to the second workpiece, the small diameter end of the end contacts the second workpiece, so that the contact area between the end and the second workpiece is small, resulting in a low connection strength between the welding column and the second workpiece. In the present application, an auxiliary riveting part is provided, and when the end is melt-connected to the second workpiece, the end is also melt-connected to the auxiliary riveting part, and an undercut area is formed at the melt-connected position of the end and the auxiliary riveting part, so that the small diameter end of the end is connected to the auxiliary riveting part through the undercut area, thereby improving the connection strength between the end and the second workpiece, making the connection strength between the first workpiece and the second workpiece higher, and more stable when used.
[0009] Preferably, as an improvement, there are multiple auxiliary riveting parts, and the multiple auxiliary riveting parts are evenly arranged around the welding column along the central axis of the welding column.
[0010] In this solution, by providing a plurality of auxiliary riveting parts, the welding column can be connected with the plurality of auxiliary riveting parts after melting, so that when the first workpiece and the second workpiece are subjected to force, the force on the welding column is more uniform and the connection is more stable.
[0011] Preferably, as an improvement, the auxiliary riveting portion is a riveting protrusion integrally formed on the second workpiece.
[0012] In this solution, the auxiliary riveting part is a riveting protrusion integrally formed on the second workpiece. The riveting protrusion has a simple structure and is easy to form. It can be easily and stably melted with the welding column to form an end and then connected.
[0013] Preferably, as an improvement, the cross-section of the riveting protrusion is triangular, quadrilateral, semicircular or semi-elliptical.
[0014] In this solution, a suitable riveted protrusion structure can be selected according to actual needs, such as strength requirements, cost control, and molding difficulty requirements. For example, in order to facilitate the molding of the riveted protrusion, the cross-section of the riveted protrusion can be set to a semicircle. In order to obtain a greater connection strength, the cross-section of the riveted protrusion can be set to a quadrilateral, etc.
[0015] Preferably, as an improvement, the riveting protrusion is arranged along the radial direction of the through hole.
[0016] In this solution, the riveted protrusions are arranged along the radial direction of the through hole, so that each riveted protrusion can be set to a suitable length according to needs, adjacent riveted protrusions do not interfere with each other, and the structure is more reasonable.
[0017] Preferably, as an improvement, the height of the rivet protruding from the second workpiece is 1.0-1.2 mm, and the length of the welding column protruding from the second workpiece is 8-10 mm.
[0018] In this solution, the height of the riveting protrusion protruding from the second workpiece is set to 1.0-1.2 mm, that is, the thickness of the riveting protrusion is 1.0-1.2 mm, the structure is simple and the molding is convenient, and it can be effectively melt-connected with the welding column.
[0019] Preferably, as an improvement, the length of the riveting protrusion is 2.0-3.0 mm.
[0020] In this solution, the length of the rivet protrusion is set to 2.0-3.0 mm, that is, the length of the rivet protrusion extending along the radial direction of the through hole is 2.0-3.0 mm, so that after the welding column melts to form an end, the length of the rivet protrusion away from the welding column is long enough to extend outside the end and effectively form an undercut area with the end, thereby increasing the connection strength between the welding column and the second workpiece.
[0021] Preferably, as an improvement, the width of the riveting protrusion is 1.2-1.5 mm.
[0022] In this solution, the width of the rivet protrusion is set to 1.2-1.5 mm to ensure that the width of the rivet protrusion is large enough to melt with the welding column to form an undercut area that can improve the connection strength.
[0023] Preferably, as an improvement, the side surfaces of the riveting protrusions are provided with draft angles, and the range of the draft angles is 10-15°.
[0024] In this solution, a draft angle of 10-15° is set on the side of the riveting protrusion, so that the riveting protrusion can be formed conveniently and stably.
[0025] Preferably, as an improvement, connecting protrusions are provided between adjacent auxiliary riveting portions.
[0026] In this solution, by providing a connection protrusion between adjacent auxiliary riveting parts, the connection strength between adjacent auxiliary riveting parts is improved, and finally the connection strength between the second workpiece and the welding column is made stronger, thereby improving the stability of the connection between the first workpiece and the second workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model.
[0028] Figure 2 for Figure 1 Section view along AA.
[0029] Figure 3 for Figure 1 Exploded diagram.
[0030] Figure 4 It is a partial cross-sectional view of the welding column connected to the second workpiece after melting in the first embodiment of the utility model.
[0031] Figure 5 for Figure 3 A partial enlarged view of point A in the middle.
[0032] Figure 6 It is a schematic diagram of the riveted protrusion in the second embodiment of the utility model.
[0033] Figure 7 It is a schematic diagram of the connection between the riveting protrusion and the connecting protrusion in the third embodiment of the utility model. DETAILED DESCRIPTION
[0034] The following is further described in detail through specific implementation methods:
[0035] The reference numerals in the drawings of the specification include: a first workpiece 1 , a second workpiece 2 , a via hole 201 , a welding column 3 , an undercut area 301 , a riveting protrusion 4 , and a connecting protrusion 5 .
[0036] Embodiment 1
[0037] This embodiment is as shown in the attached Figure 1 As shown: A high-strength riveting structure of a workpiece includes a first workpiece 1 and a second workpiece 2 located on the top surface of the first workpiece 1. The top surface of the first workpiece 1 is integrally formed with a vertically arranged welding column 3. Figure 3 The second workpiece 2 is provided with a vertically penetrating through hole 201 cooperating with the welding column 3. The length of the welding column 3 protruding from the top surface of the second workpiece 2 is 8-10 mm, and preferably 10 mm in this embodiment.
[0038] Combination Figure 1 and Figure 2 , the top surface of the second workpiece 2 is provided with an auxiliary riveting portion protruding from the second workpiece 2. In this embodiment, the auxiliary riveting portion is a riveting protrusion 4 integrally formed on the second workpiece 2. The number of riveting protrusions 4 is multiple and the multiple riveting protrusions 4 are evenly arranged around the welding column 3 along the central axis of the welding column 3. In this embodiment, the number of riveting protrusions 4 corresponding to each welding column 3 is six, and each riveting protrusion 4 is arranged along the radial direction of the through hole 201. The cross-section of the riveting protrusion 4 is triangular, quadrilateral, semicircular or semi-elliptical. The length of the riveting protrusion 4 is 2.0-3.0 mm, the height protruding from the top surface of the second workpiece 2 is 1.0-1.2 mm, and the width of the riveting protrusion 4 is 1.2-1.5 mm. In this embodiment, the length of the riveting protrusion 4 (i.e. Figure 5 The L in the figure is preferably 2.3 mm, the height (i.e. Figure 5 The H in the figure is preferably 1.0 mm, the width (i.e. Figure 5 D) is preferably 1.4 mm; at the same time, in order to facilitate the manufacturing and forming of the riveting protrusion 4, combined with Figure 3 and Figure 5 The four sides of the riveting protrusion 4 are all provided with a draft angle in the range of 10-15°, and in this embodiment, 10° is preferred.
[0039] The specific implementation process is as follows:
[0040] In this embodiment, when the first workpiece 1 and the second workpiece 2 are connected, when the welding column 3 is melted by hot melting to connect the welding column 3 to the second workpiece 2, the portion of the welding column 3 protruding from the second workpiece 2 gradually melts, so that the length of the welding column 3 becomes shorter and the diameter increases, and finally the welding column 3 is formed. Figure 3 The end head shown is fused together with the top surface of the second workpiece 2, so that the welding column 3 is connected and fixed to the second workpiece 2, and finally the first workpiece 1 and the second workpiece 2 are connected and fixed by the connection of the welding column 3.
[0041] In this embodiment, since the riveting protrusion 4 is provided, when fixing the first workpiece 1 and the second workpiece 2, the riveting protrusion 4 is provided. Figure 4 The end formed after the welding column 3 is melted is in the shape of a mushroom head with a larger top and a smaller bottom. Due to the existence of the rivet protrusion 4, the small diameter end at the bottom of the end can be melted with the rivet protrusion 4 to form an undercut area 301, which not only makes it easier to connect the end to the second workpiece 2, but also improves the connection strength between the welding column 3 and the second workpiece 2, thereby effectively improving the stability and strength of the connection between the first workpiece 1 and the second workpiece 2.
[0042] Embodiment 2
[0043] The difference between the second embodiment and the first embodiment is that: in the first embodiment, the riveting protrusion 4 is a square column along the radial direction of the through hole 201, and in this embodiment, Figure 6 As shown, the riveting protrusion 4 can be set to a wave shape, a broken line shape, etc. At the same time, in other embodiments other than this embodiment, the riveting protrusion 4 can also be set to a round cake shape, which can also play a role in improving the connection strength, which will not be repeated in this embodiment.
[0044] Embodiment 3
[0045] The difference between the third embodiment and the first embodiment is that: Figure 7 As shown, in this embodiment, a connecting protrusion 5 is integrally formed between adjacent riveted protrusions 4. The connecting effect of the connecting protrusion 5 makes the connection between adjacent riveted protrusions 4 more stable, thereby making the connection between the welding column 3 and the second workpiece 2 more stable, and finally making the connection strength between the first workpiece 1 and the second workpiece 2 higher.
[0046] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A high-strength riveting structure for workpieces, comprising a first workpiece and a second workpiece that cooperate with each other, the first workpiece is provided with a welding column, and the second workpiece is provided with a through hole that cooperates with the welding column, characterized in that: An auxiliary riveting portion protruding out of the second workpiece is provided on a side of the second workpiece facing away from the first workpiece, and the auxiliary riveting portion is located on one side of the welding column.
2. A workpiece high-strength riveting structure according to claim 1, characterized in that: There are multiple auxiliary riveting parts, and the multiple auxiliary riveting parts are evenly arranged around the welding column along the central axis of the welding column.
3. A workpiece high-strength riveting structure according to claim 2, characterized in that: The auxiliary riveting portion is a riveting protrusion integrally formed on the second workpiece.
4. A workpiece high-strength riveting structure according to claim 3, characterized in that: The cross section of the riveting protrusion is triangular, quadrilateral, semicircular or semi-elliptical.
5. The high-strength riveting structure for workpieces according to claim 3, characterized in that: The riveting protrusion is arranged along the radial direction of the through hole.
6. A workpiece high-strength riveting structure according to claim 5, characterized in that: The height of the rivet protruding from the second workpiece is 1.0-1.2 mm, and the length of the welding column protruding from the second workpiece is 8-10 mm.
7. The high-strength riveted structure for workpieces according to claim 5, characterized in that: The length of the riveting protrusion is 2.0-3.0 mm.
8. The high-strength riveted structure for workpieces according to claim 5, characterized in that: The width of the riveting protrusion is 1.2-1.5 mm.
9. The high-strength riveted structure for workpieces according to claim 5, characterized in that: The side surfaces of the riveting protrusions are all provided with draft angles, and the range of the draft angles is 10-15°.
10. A workpiece high-strength riveted structure according to any one of claims 1 to 9, characterized in that: Connecting protrusions are arranged between adjacent auxiliary riveting parts.