Riveting damage drill bit
By designing the opening and positioning needle structure of the drill bit, the serious problem of rivet damage when ordinary drill bits are disassembled and riveted is solved, and the retention of rivet column materials and the stability of riveting are improved.
Patent Information
- Application Number
- CN202421924438.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-09
AI Technical Summary
When disassembling riveted parts, the rivet columns are severely damaged, resulting in weak rivet heads during reassembly, affecting riveting stability.
A riveting damage drill bit is designed. The end of the drill bit body is equipped with openings and teeth, and the positioning needles and fillers are set in the opening. The edge of the rivet head is cut off by rotating the drill bit body, and the rivet column glue is retained to avoid excessive damage to the rivet column and rivet head.
Reduce damage to the rivet head and rivet column, ensuring that there is enough glue on the rivet column for re-rive, and improves the stability and quality of the rivet.
Smart Images
Figure CN223145901U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of maintenance tools, in particular to a riveting destruction drill bit. Background Technique
[0002] Plastic riveting is a common fixed connection method for two parts of an automobile, and it can realize the connection between plastic and metal, and plastic and plastic in the form of plastic rivets. During riveting, the plastic riveting post on one part passes through the riveting hole on the other part, and then the end of the riveting post passing through the riveting hole is heated to make it melt, and then the end of the riveting post is pressed into a riveting head, and then it is cooled to make the riveting head solidify. At this time, the riveting head presses around the riveting hole, realizing the plastic riveting of the two parts.
[0003] When repairing automobile parts, sometimes it is necessary to disassemble two riveted parts, so it is necessary to damage the riveted part. At present, the way to damage the riveted part is to use an ordinary drill bit to drill and damage the riveting head, so that the riveting head falls off from the riveting post, so that the two parts are released from riveting. However, when this ordinary drill bit damages the riveting head, it will cause more damage to the riveting post. When the two parts are reassembled later, there is no extra glue on the riveting post that can melt to form a riveting head, thus affecting the reassembly and fixation of the two parts. Even if the end of the riveting post can still form a riveting head, but the damaged part of the riveting post is more, and the remaining glue of the riveting post is less. In this way, the volume and thickness of the newly formed riveting head are smaller, the riveting head is weak, and the riveting stability is greatly affected. Content of the Utility Model
[0004] The utility model aims to provide a riveting destruction drill bit, which can reduce the damage to the riveting post and the riveting head compared with using an ordinary drill bit to damage the riveting head, so that more glue is retained on the riveting post.
[0005] To achieve the above object, the utility model adopts the following technical scheme: a riveting destruction drill bit, including a drill bit body, an opening is provided at the end of the drill bit body, the opening and the drill bit body share the same center line, the inner side wall of the opening is circular, and a plurality of teeth are provided at the edge of the opening.
[0006] The principle and advantages of this solution are as follows: When damaging the riveting head, the end of the drill bit body acts vertically on the riveting head, and then the drill bit body rotates. The opening at the end of the drill bit body damages the riveting head, and the teeth of the opening cut off the part of the riveting head located outside the edge of the rivet hole, thus achieving the damage of the riveting head, and the riveting post can be removed from the rivet hole. During the rotation of the drill bit body, the opening can accommodate the remaining part of the riveting head that has not been cut off, and the remaining part in the middle of the riveting head and the riveting post will not be damaged. In this way, more adhesive material will remain on the riveting post, which can ensure that there is enough adhesive when the riveting post and the remaining part of the riveting head are remelted for riveting later, guarantee the stability of the newly formed riveting head and the firmness of the riveting, and is conducive to ensuring the quality of subsequent riveting.
[0007] Preferably, as an improvement, the thickness of the edge of the opening is 0.2 - 0.8 mm. Thus, the edge of the opening is relatively thin, which can cause less damage to the riveting head and cut off less material around the riveting head. In this way, while cutting off the material around the riveting head, the removal of excess adhesive material on the riveting head is reduced, so that more adhesive material remains on the remaining part of the riveting head.
[0008] Preferably, as an improvement, a positioning pin is provided inside the opening, and the positioning pin is located at the center of the opening.
[0009] In the prior art, after the riveting head is formed, there will be a hole in the middle of the surface of the riveting head. Therefore, in this solution, a positioning pin is provided inside the opening. In this way, when damaging the riveting head, the positioning pin is inserted into the hole of the riveting head, which has a positioning effect on the rotation of the drill bit body, so that the drill bit body will not move laterally when damaging the riveting head, improving the accuracy of damaging the riveting head.
[0010] Preferably, as an improvement, a filler is filled inside the opening and is located between the positioning pin and the inner wall of the opening.
[0011] Thus, the filler is located inside the opening. The filler plays a role in filling the inside of the opening, can fix the positioning pin, and prevent the positioning pin from tipping over. At the same time, the filler also plays a role in limiting the depth of downward damage. During the process of damaging the riveting head, when the filler abuts against the riveting head entering the opening, the downward movement of the drill bit body is blocked at this time, preventing the drill bit body from moving too deep downward and damaging the part provided with the rivet hole.
[0012] Preferably, as an improvement, the distance between the filler and the edge of the opening is 2 - 4 mm.
[0013] It is more appropriate to set the distance between the filler and the edge of the opening to 2 - 4 mm. If the distance is too large, the limiting effect of the filler will not be obvious, and the drill bit body will damage the part; if the distance is too small, the edge part of the riveting head will not be cut off.
[0014] Preferably, as an improvement, the diameter of the positioning pin is ≤ 2 mm.
[0015] Therefore, the positioning pin cannot be too thick, otherwise it cannot be inserted into the hole of the riveting head and cannot play the positioning role of the positioning pin.
[0016] Preferably, as an improvement, the diameter of the inner wall of the opening is 5 - 10 mm. Thus, the opening with a diameter of 5 - 10 mm is adapted to the size of the riveting head. If the diameter of the opening is smaller than the above range, the opening will be smaller and more parts of the riveting head need to be cut off. If the diameter of the opening is larger than the above range, the opening will be larger and the edge part of the riveting head will still get stuck on the part after being cut off.
[0017] Preferably, as an improvement, the filling material is AB glue.
[0018] Preferably, as an improvement, the drill bit body includes an outer cylinder and an insertion rod. One end of the insertion rod is inserted inside the outer cylinder, and the other end of the insertion rod is located outside the outer cylinder. The insertion rod and the outer cylinder are fixed; the teeth are located on the edge of the end of the outer cylinder away from the insertion rod.
[0019] Therefore, the drill bit body is assembled by two parts, namely the outer cylinder and the insertion rod. Both the outer cylinder and the insertion rod can be processed and manufactured separately, and then the two can be assembled. The whole drill bit body is manufactured in two parts separately, which is beneficial to reducing the processing and manufacturing difficulty of the whole drill bit body. At the same time, the end of the insertion rod located inside the outer cylinder plays a role in limiting the depth of damage to the drill bit body.
[0020] Preferably, as an improvement, the inner wall of the outer cylinder is provided with an axial slot, and the outer wall of the insertion rod is provided with an axial rib, and the rib is stuck in the slot. Thus, when the insertion rod is inserted into the outer cylinder, the positioning of the outer cylinder and the insertion rod is achieved by the rib being located in the slot, and the outer cylinder and the insertion rod will not rotate relative to each other, which is convenient for further fixing the outer cylinder and the insertion rod with screws. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic structural diagram of a riveting destruction drill bit in Embodiment 1.
[0022] Figure 2 It is a schematic structural diagram of a riveting destruction drill bit in Embodiment 2.
[0023] Figure 3 It is a schematic structural diagram of the insertion rod.
[0024] Figure 4 It is a schematic structural diagram of the outer cylinder.
[0025] Figure 5 It is a schematic diagram of the structure of the riveting head. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The following is a further detailed description through specific embodiments:
[0027] The reference numerals in the accompanying drawings of the specification include: drill bit body 1, opening 2, filler 3, teeth 4, positioning pin 5, positioning end 6, spline 7, insertion rod 11, insertion portion 12, outer cylinder 13, clamping strip 14, fixing hole 15, card slot 16, notch 17, riveting post 18, riveting head 19, edge portion 20.
[0028] Embodiment 1
[0029] Basically as shown in the appendix Figure 1 shown: A riveting-destruction drill bit includes a drill bit body 1. The drill bit body 1 is made of hard metal material, and the shape of the drill bit body 1 is rod-shaped. Figure 1 The bottom end of the drill bit body 1 in the figure is used to be inserted on the rotating end of the electric drill, and the drill bit in this embodiment is driven to rotate by the electric drill. The fixed connection method between the drill bit and the electric drill in this embodiment is the prior art, and the fixed method of the ordinary drill bit and the electric drill can be referred to, and will not be elaborated here.
[0030] In this embodiment, an opening 2 is provided at the top of the drill bit body 1. The opening 2 and the drill bit body 1 are coaxial in the vertical direction. The inner side wall of the opening 2 is circular, and a plurality of teeth 4 are provided at the edge of the opening 2 (the edge of the top of the drill bit body 1). The setting of the teeth 4 facilitates the destruction of the riveting head. In this embodiment, the thickness of the edge of the opening 2 is 0.2 - 0.8 mm, for example, the thickness of the edge of the opening 2 is 0.3 mm. The inner wall diameter of the opening 2 is 5 - 10 mm, for example, it is set to 7 mm. When destroying riveting heads of different sizes, the drill bit can be set to different specifications.
[0031] Thus, during use, the drill bit in this embodiment ( Figure 1 the bottom of the drill bit in the figure) is installed on the rotating end of the electric drill. This is the prior art and will not be elaborated in this patent. Combining Figure 5 shown, when destroying the riveting part, the end of the drill bit body 1 provided with the opening 2 is vertically applied to the riveting head 19, and then the electric drill is rotated. The electric drill drives the drill bit to rotate, and the drill bit body 1 cuts off the edge portion 20 of the riveting head 19. The uncut portion on the riveting head 19 is received in the opening 2 and is still connected to the riveting post 18.
[0032] After the edge portion 20 of the riveting head 19 is cut off in this way, the edge portion 20 of the riveting head 19 no longer presses around the edge of the riveting hole of the part, and the part provided with the riveting hole can be removed from the riveting post 18. At the same time, since the central portion of the riveting head 19 (the remaining portion after the edge portion 20 of the riveting head 19 is cut off) and the riveting post 18 are not damaged, after the subsequent reassembly of the two parts, the riveting post 18 can still pass through the riveting hole on the part, and the remaining portion of the riveting head 19 or the riveting post is heated to melt to form a new riveting head 19, so as to realize the re-stable riveting of the two parts.
[0033] In this embodiment, the drill bit body is set with the above parameters. The volume of the upper edge part 20 of the riveting head 19 cut off is moderate, which will not result in too many cut-off parts or too much remaining part of the riveting head 19. At the same time, it will not make the volume of the cut-off part of the edge part 20 too small, ensuring that the two parts can be normally disassembled after the edge part 20 is cut off.
[0034] Combined with Figure 1 As shown, in other embodiments, a vertical positioning pin 5 is provided inside the opening 2. The positioning pin 5 is located at the center of the opening 2, and the top of the positioning pin 5 is a positioning end 6. The diameter of the positioning pin 5 ≤ 2 mm, such as 1.5 mm. The opening 2 is filled with a filler 3 located between the positioning pin 5 and the inner wall of the opening 2. The filler 3 can specifically be AB glue in this embodiment, and can also be other materials in other embodiments, such as plastics, etc. Figure 1 The distance between the top of the filler 3 and the edge of the opening 2 is 2 - 4 mm, such as 3 mm.
[0035] Combined with Figure 5 As shown, a hole is provided in the middle of the riveting head 19 in the prior art. Therefore, the inventor sets a positioning pin 5 inside the opening 2. When the riveting head 19 is damaged, the positioning pin 5 is inserted into the hole of the riveting head 19, thus playing a role in positioning the drill bit. The drill bit will not move laterally when damaging the riveting head 19, ensuring the accuracy of the damage. At the same time, during the downward movement of the end of the drill bit body 1, when the edge part 20 of the riveting head 19 is cut off from the riveting head 19, the filler 3 abuts against the riveting head 19 that enters the opening 2, so that the drill bit body 1 can no longer move downward. The filler 3 plays a role in limiting the downward damage of the drill bit body 1 to the riveting head 19, avoiding excessive downward movement of the drill bit body 1 and damaging the parts below the riveting head 19.
[0036] In addition, in other embodiments, a slot is provided at the bottom of the opening 2. The slot is a spline groove, and a spline 7 is provided at the bottom of the positioning pin 5. In this way, the positioning pin 5 is inserted into the slot, and the assembly of the positioning pin 5 into the slot in the opening 2 plays a role in positioning the positioning pin 5. At the same time, through the cooperation of the spline 7 and the spline groove, the stability of the positioning pin 5 in the opening 2 is improved.
[0037] Embodiment 2
[0038] This embodiment provides a riveting damage drill bit with another structure. Combined with Figures 2 - 4As shown, the drill bit body 1 includes an outer cylinder 13 and a plug rod 11, and both the outer cylinder 13 and the plug rod 11 are made of hard metal materials. The plug rod 11 includes an insertion part 12, and a positioning pin 5 is integrally formed at the central part of the end of the insertion part 12. In this embodiment, the insertion part 12 is used to be inserted into the outer cylinder 13, and a notch 17 is provided on the outer wall of the insertion part 12 for accommodating the outer cylinder 13. After the insertion part 12 of the plug rod 11 is inserted into the inner part of the outer cylinder 13, the other end of the plug rod 11 is located outside the outer cylinder 13. At this time, the bottom end part of the outer cylinder 13 is in contact with Figure 3 the bottom of the notch 17 in it. The plug rod 11 and the outer cylinder 13 are fixed. Specifically, fixing holes 15 are provided on both the insertion part 12 of the plug rod 11 and the outer cylinder 13. The two fixing holes 15 face each other, and then they are fixed by screwing a screw into the two fixing holes 15.
[0039] In this embodiment, the tooth 4 is located on the edge of the end of the outer cylinder 13 away from the plug rod 11. Figure 2 The distance between the end of the insertion part 12 and the edge of the outer cylinder 13 in it is 2 - 4 mm, for example, 3 mm. The diameter of the positioning pin 5 is 1.5 mm, and the edge thickness of the outer cylinder 13 is 0.3 mm.
[0040] In addition, in order to facilitate the fixing of the outer cylinder 13 and the plug rod 11 by screws, two axial clamping grooves 16 are provided on the inner wall of the outer cylinder 13, and two axial clamping strips 14 are provided on the outer wall of the insertion part 12. When the insertion part 12 is inserted into the outer cylinder 13, the clamping strips 14 are clamped in the clamping grooves 16, so that the outer cylinder 13 and the plug rod 11 will not rotate relative to each other, and the two fixing holes 15 remain opposite, and then they can be fixed by using screws.
[0041] When destroying the riveting head 19 in this embodiment, refer to the usage method in Embodiment 1, which will not be elaborated here. In this embodiment, during the downward movement of the end of the drill bit body 1, when the edge part 20 of the riveting head 19 is cut off from the riveting head 19, the end of the insertion part 12 in the opening 2 abuts against the riveting head 19 that enters the opening 2, so that the drill bit body 1 can no longer move downward, avoiding excessive downward movement of the drill bit body 1 and causing damage to the part provided with the riveting hole.
[0042] The above are only the embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics known in the solutions are 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 present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners in the specification and other records can be used to interpret the content of the claims.
Claims
1. A riveting failure drill bit, comprising a drill bit body, characterized in that: The end of the drill bit body is provided with an opening. The opening and the drill bit body share the same center line. The inner side wall of the opening is circular, and multiple teeth are provided at the edge of the opening.
2. The riveting failure drill bit according to claim 1, characterized in that: The thickness of the edge of the opening is 0.2 - 0.8 mm.
3. A riveting failure drill bit according to claim 1, characterized in that: A positioning pin is provided inside the opening, and the positioning pin is located at the center of the opening.
4. A riveting failure drill bit according to claim 3, characterized in that: The opening is filled with a filler located between the positioning pin and the inner wall of the opening.
5. The riveting failure drill bit according to claim 4, characterized in that: The distance between the filler and the edge of the opening is 2 - 4 mm.
6. The riveting failure drill bit according to claim 3, wherein: The diameter of the positioning pin is ≤ 2 mm.
7. A riveting failure drill bit according to claim 1, characterized in that: The diameter of the inner wall of the opening is 5 - 10 mm.
8. A riveting failure drill bit according to claim 4, characterized in that: The filler is AB glue.
9. A riveting failure drill bit according to any one of claims 1-3, 6-7, characterized in that: The drill bit body includes an outer cylinder and an insertion rod. One end of the insertion rod is inserted inside the outer cylinder, and the other end of the insertion rod is located outside the outer cylinder. The insertion rod and the outer cylinder are fixed; the teeth are located on the edge of the end of the outer cylinder away from the insertion rod.
10. A riveting failure drill bit according to claim 9, characterized in that: Axial grooves are provided on the inner wall of the outer cylinder, and axial strips are provided on the outer wall of the insertion rod. The strips are stuck in the grooves.