Stamping part nut riveting device
By designing the guide surface, root cleaning groove, and centering surface structure of the upper and lower riveting heads, the problem of inaccurate positioning of the lower riveting head was solved, thereby improving the positioning accuracy and riveting effect of the riveting device and increasing the product qualification rate.
Patent Information
- Application Number
- CN202423136657.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-19
AI Technical Summary
In the existing technology, inaccurate positioning of the lower rivet head leads to unsatisfactory nut flange during riveting with the upper rivet head, resulting in a low pass rate.
A stamping nut riveting device was designed, which adopts a special structure of upper and lower riveting heads, including a guide surface, a root cleaning groove and a centering surface. The guide surface guides the riveting nut to be coaxial, the root cleaning groove ensures stable contact, and the upper riveting head makes circumferential contact with the edge of the first blind hole to eliminate fit error and achieve accurate positioning.
This improves the flanging effect and product qualification rate of rivet nuts, ensuring the accuracy and stability of the riveting process.
Smart Images
Figure CN223670041U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to riveting tool technical field, especially relate to a stamping nut riveting device. BACKGROUND
[0002] In the automobile manufacturing industry, the aluminum body riveting sheet metal part is pre-stamped with a round hole, when the sheet metal part is riveted with the nut, the riveting nut needs to be put into the lower riveting head hole of the riveting equipment first, the sheet metal part is sleeved on the nut through the round hole, then the upper riveting head of the riveting equipment is downwardly displaced to exert pressure on the nut to make it flange, so as to complete the riveting between the sheet metal part and the nut, the cooperation of the upper riveting head and the lower riveting head used in the prior art is unreasonable, the lower riveting head is not accurately positioned, so that the nut cannot be flanged or the flanging effect is not ideal when the upper riveting head is riveted, the technical requirements cannot be met, and the qualified rate is low.
[0003] Therefore, in view of the above problems, the utility model provides a stamping nut riveting device which has stable flanging effect and is helpful to improve the product qualified rate. UTILITY MODEL CONTENT
[0004] The utility model discloses a stamping nut riveting device which overcomes the defects of the prior art and solves the problem of inaccurate positioning of the lower riveting head, which leads to unsatisfactory flanging of the nut when the upper riveting head is riveted and low qualified rate.
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] The utility model discloses a stamping nut riveting device which overcomes the defects of the prior art and solves the problem of inaccurate positioning of the lower riveting head, which leads to unsatisfactory flanging of the nut when the upper riveting head is riveted and low qualified rate.
[0007] The upper riveting head and the lower riveting head:
[0008] The upper riveting head is formed with a riveting boss at the bottom end;
[0009] The lower riveting head is provided with a positioning hole matched with the riveting nut gap, and the positioning hole is sequentially formed with a first blind hole and a second blind hole from top to bottom;
[0010] The first blind hole side wall bottom end and the bottom wall connecting position are formed with a guide surface with a guide inclination angle a, and the first blind hole bottom wall is provided with a root cleaning groove at the bottom end position of the guide surface;
[0011] The upper riveting head is formed with a taper structure above the riveting boss, and the centering surface can be in circumferential contact with the first blind hole top end edge position.
[0012] Further, the included angle b between the centering surface and the upper riveting head end face is 110°-130°.
[0013] Further, the guide angle a of the guide surface is 135°.
[0014] Further, the width of the root cleaning groove is 2-4mm, and the depth is 0.5mm.
[0015] Further, a 45° right-angle chamfer is processed at the connecting position of the first blind hole bottom wall and the second blind hole side wall.
[0016] In the above technical solution, the stamping nut riveting device has the beneficial effects that:
[0017] The lower riveting head is designed, the first blind hole is guided by the guide surface to guide the riveting nut to be coaxial with the second blind hole, and the matching error is eliminated, the root cleaning groove is used to ensure that the riveting nut end surface is in stable contact with the first blind hole bottom wall, the upper riveting head is in circumferential contact with the first blind hole top end edge position through the centering surface, the coaxiality of the riveting boss of the upper riveting head and the positioning hole of the lower riveting head can be pre-adjusted before riveting, and the matching error is further eliminated, and the riveting device realizes accurate positioning, and effectively improves the riveting effect and the qualified rate of the riveting nut. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.
[0019] Figure 1 is a whole structure schematic view of the stamping nut riveting device disclosed by the present application;
[0020] Figure 2 is a partial enlarged view of the lower riveting head of the stamping nut riveting device disclosed by the present application;
[0021] Figure 3 is a centering state schematic view of the upper riveting head and the lower riveting head of the stamping nut riveting device disclosed by the present application.
[0022] MARKED DESCRIPTION OF DRAWINGS:
[0023] 1, upper riveting head; 2, riveting boss; 3, centering surface; 4, lower riveting head; 5, first blind hole; 6, second blind hole; 7, guide surface; 8, root cleaning groove; 9, chamfer; 10, riveting nut; 11, sheet metal part. DETAILED DESCRIPTION
[0024] In order to make those skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.
[0025] Referring to Figure 1 as shown;
[0026] The utility model punch nut riveting device is used for riveting the flanged riveting nut 10, and the riveting device comprises an upper riveting head 1 and a lower riveting head 4:
[0027] The upper riveting head 1 is fixedly connected with the riveting equipment at the top end and is formed with a riveting boss 2 at the bottom end, and the riveting nut 10 is made to complete the riveting with the sheet metal part 11 through the riveting boss 2;
[0028] The lower riveting head 4 is provided with a positioning hole in clearance fit with the riveting nut 10, the positioning hole is sequentially formed with a first blind hole 5 and a second blind hole 6 from top to bottom, the second blind hole 6 is in small clearance fit with the riveting nut 10, the fit clearance of the second blind hole 6 with the riveting nut 10 is smaller than that of the first blind hole 5, a guide surface 7 with a guide angle a is formed at the position of the bottom end of the side wall of the first blind hole 5 and the bottom wall in connection, for guiding the riveting nut 10 to be coaxial with the second blind hole 6, eliminating the fit error, realizing accurate positioning, improving the riveting effect of the riveting nut, thereby improving the qualified rate, and a root cleaning groove 8 is formed at the position of the bottom end of the guide surface 7 on the bottom wall of the first blind hole 5, the edge corner position of the riveting nut 10 is avoided through the root cleaning groove 8, and the phenomenon that the end face is not in stable contact with the bottom wall of the first blind hole 5 due to the inconsistent or edge of the riveting nut 10 is avoided;
[0029] The upper riveting head 1 is fixedly connected with the riveting equipment at the top end and is formed with a riveting boss 2 at the bottom end, and the riveting nut 10 is made to complete the riveting with the sheet metal part 11 through the riveting boss 2; Figure 3 The upper riveting head 1 is in circumferential contact with the top edge position of the first blind hole 5 through the centering surface 3, and the coaxiality of the riveting boss of the upper riveting head 1 and the positioning hole of the lower riveting head 4 can be pre-calibrated before riveting, so that the fit error can be further eliminated.
[0030] Preferably, the upper riveting head 1 is in cylindrical structure, the upper riveting head 1 is formed with the centering surface 3 above the riveting boss 2, the small end diameter of the centering surface 3 is smaller than the diameter of the first blind hole 5, and the large end diameter is larger than the diameter of the first blind hole 5, the position of the lower riveting head 4 on the workbench of the riveting equipment is adjusted through the centering surface 3, so that the riveting boss 2 of the upper riveting head 1 and the positioning hole of the lower riveting head 4 are concentric.
[0031] Preferably, the included angle b between the centering surface 3 and the end surface of the upper riveting head 1 is 110-130°, and specifically 120°.
[0032] Preferably, the guide angle a of the guide surface 7 is 135°.
[0033] Preferably, the width of the root cleaning groove 8 is 2-4mm, and specifically 3mm, and the depth of the root cleaning groove 8 is 0.5mm.
[0034] Preferably, a 45° right-angle chamfer 9 is formed at the position where the bottom wall of the first blind hole 5 is connected with the side wall of the second blind hole 6.
[0035] In the above technical solution, the stamping nut riveting device has the beneficial effects that:
[0036] The lower riveting head is first coaxial with the riveting nut and the second blind hole through the guiding surface of the first blind hole, and the matching error is eliminated; secondly, the end surface of the riveting nut is stably contacted with the bottom wall of the first blind hole 5 through the root cleaning groove; and thirdly, the upper riveting head is circumferentially contacted with the first blind hole 5 through the centering surface 3 and the top edge position of the first blind hole 5, and the coaxiality of the riveting boss of the upper riveting head 1 and the positioning hole of the lower riveting head 4 can be pre-adjusted before riveting, so that the matching error is further eliminated, and the riveting device is accurate in positioning, and the riveting effect and the qualified rate of the riveting nut are effectively improved.
[0037] The above only describes some exemplary embodiments of the utility model in a manner of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the utility model for ordinary skilled in the art. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.
Claims
1. A punch nut riveting device, characterized by, The utility model relates to a riveting device, including: Upper riveting head (1) and lower riveting head (4): The bottom end of the upper riveting head (1) is formed with a riveting boss (2); The lower riveting head (4) is provided with a positioning hole matched with a riveting nut (10) in clearance, and the positioning hole is sequentially formed with a first blind hole (5) and a second blind hole (6) from top to bottom; The first blind hole (5) is formed with a guide surface (7) with a guide inclination angle a at the position where the side wall bottom end of the first blind hole (5) is connected with the bottom wall; Wherein, the upper riveting head (1) is formed with a centering surface (3) with a conical structure above the riveting boss (2) and can be in contact with the edge position of the top end of the first blind hole (5) in the circumferential direction.
2. The punch nut riveting device of claim 1, Its characteristics are that: The included angle b between the centering surface (3) and the end surface of the upper riveting head (1) is 110-130 degrees.
3. The punch nut riveting device of claim 1, wherein ； The guide inclination angle a of the guide surface (7) is 135 degrees.
4. The punch nut riveting device of claim 1, wherein ； The width of the root cleaning groove (8) is 2-4 mm, and the depth is 0.5 mm.
5. The punch nut riveting device of claim 1, wherein ； A 45-degree right-angle chamfer (9) is processed at the position where the bottom wall of the first blind hole (5) is connected with the side wall of the second blind hole (6).