A reaming device for riveting nuts

Abstract

The utility model relates to riveting nut reaming technical field, especially in a kind of reaming device for riveting nut, including bolt and conical bushing;The middle part of bolt has external thread, and bottom is held by internal thread handle;The through hole A with internal thread is set in the center of conical bushing, and is matched with the external thread of bolt, and conical bushing includes the positioning portion of equal thick and the reaming portion of conical inner collection, and the taper of reaming portion matches with the upper end of riveting nut to be reamed, and the vertical downward movement of bolt is reamed to the outside to the vertical along of being reamed to be carried out.External thread is matched with the external thread of bolt, and conical bushing includes the positioning portion of equal thick and the reaming portion of conical inner collection, and the taper of reaming portion matches with the upper end of riveting nut to be reamed, and the vertical downward movement of bolt is reamed to the outside to the vertical along of being reamed to be carried out.The utility model uses the mode of pressure forming instead of stamping mode, and force is evenly distributed in reaming process, and the crack caused by traditional stamping mode can be effectively reduced, the difficulty of reaming in narrow space by traditional general tool is effectively reduced, efficiency is greatly improved, and the surface roughness of assembly part is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of hole enlargement technology for riveting nuts, and in particular to a hole enlargement device for riveting nuts. Background Technology

[0002] The engine's internal and external conical housings and other components have complex structures. Their main shape is a conical rotating structure, which is generally made of materials such as stainless steel, titanium alloy and high-temperature alloy through welding and assembly. During assembly, the connection is often achieved by expanding the hole and riveting the nut. Expanding the hole and riveting the nut is often used in confined spaces, which is extremely difficult to implement with traditional general tools. At the same time, the stamping method is prone to causing quality defects such as cracks and surface scratches. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model discloses a hole-expanding device for riveting nuts.

[0004] The specific technical solution is as follows:

[0005] A hole-expanding device for riveting nuts includes a bolt and a tapered bushing; the bolt has an external thread in the middle and is held at the bottom by an internal thread handle; the tapered bushing has a through hole A with an internal thread in the center, which mates with the external thread of the bolt; the tapered bushing includes a positioning part of equal thickness and a tapered expanding part, the taper of which matches the vertical edge of the hole to be expanded at the upper end of the riveting nut; the vertical edge of the hole to be expanded is expanded outward by the vertical downward movement of the bolt.

[0006] The internal thread handle is plate-shaped, with one end having a transitional shape between a circular arc segment and a straight line segment, and a through hole B is opened on the circular arc segment.

[0007] A washer is added between the internal thread handle and the rivet nut.

[0008] The washer has a through hole C in the center and is fitted onto the bottom of the external thread of the bolt.

[0009] The washer is made of aluminum alloy.

[0010] Compared with the prior art, the present invention has the following beneficial technical effects:

[0011] This utility model provides positioning for a tapered bushing with a bolt. The bushing and the bolt, which provides pressure, form a structure that ensures linear movement of the tapered bushing without relative movement to the surface of the formed, enlarged-hole riveting nut. An internally threaded handle, working with the bolt in a confined space, provides pressure to hold the bottom of the tapered bushing. A washer is added between the internally threaded handle and the nut to prevent the handle from scratching the riveting nut during pressure forming.

[0012] This invention uses pressure forming instead of stamping, resulting in uniform force during hole enlargement, which effectively reduces cracks caused by traditional stamping. It also effectively reduces the difficulty of enlarging holes in confined spaces using traditional general-purpose tools, greatly improving efficiency, and also effectively improves the surface roughness of the assembly. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the hole-expanding device of this utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the bolt of this utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the conical bushing of this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the internal thread handle of this utility model;

[0017] In the diagram, 1. Bolt; 2. Tapered bushing; 21. Through hole A; 22. Enlarged hole section; 23. Positioning section; 3. Internal thread handle; 31. Arc segment; 32. Straight segment; 33. Through hole B; 4. Washer; 41. Through hole C; 5. Narrow space; 6. Riveted nut; 61. Screw hole; 62. Vertical edge to be enlarged. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the hole-expanding device of this utility model. Figure 2 This is a three-dimensional structural diagram of the bolt of this utility model. Figure 3 This is a three-dimensional structural diagram of the conical bushing of this utility model. Figure 4 The figure shows a three-dimensional structural diagram of the internal thread handle of this utility model:

[0020] The present invention proposes a hole-expanding device for riveting nuts, comprising a bolt 1 and a tapered bushing 2. The bolt 1 has an external thread in the middle and is held at the bottom by an internal thread handle 3. The internal thread handle 3 is plate-shaped, with one end having a transition shape between an arc segment 31 and a straight segment 32. A through hole B33 is opened on the arc segment 31. A washer 4 is added between the internal thread handle 3 and the riveting nut 6 to prevent the handle from scratching the riveting nut 6 during pressure forming. A through hole C41 is opened in the center of the washer 4, which is fitted onto the bottom of the external thread of the bolt. The tapered bushing 2 has a through hole A21 with an internal thread in the center, which mates with the external thread of the bolt 1. The tapered bushing 2 includes a positioning part 23 of equal thickness and a tapered expanding part 22. The taper of the expanding part 22 matches the vertical edge 62 of the hole to be expanded at the upper end of the riveting nut 6. The vertical downward movement of the bolt 1 expands the vertical edge 62 of the hole to be expanded.

[0021] In use, place the tapered bushing 2 with its enlarged portion 22 facing downwards inside the upper edge of the rivet nut 6. Then, screw the bolt 1 into the through hole A21 of the tapered bushing 2 and vertically insert it into the threaded hole 61 of the rivet nut 6 to be enlarged, so that the enlarged portion 22 matches and aligns with the vertical edge 62 to be enlarged. The bolt 1 provides positioning for the tapered bushing 2. Next, in the confined space 5, use the internal thread handle 3 and washers 4 to hold the bottom of the tapered bushing 2 from the bottom, which, together with the bolt 1, provides pressure. Finally, screw the bolt 1 from the top, causing the tapered bushing 2 to move linearly downwards without relative movement to the surface of the rivet nut 6 to be enlarged, thus completing the enlargement of the vertical edge 62 at the upper end of the rivet nut 6.

Claims

1. A hole-reaming device for riveting nuts, characterized in that: It includes a bolt and a tapered bushing; the bolt has an external thread in the middle and is held by an internal thread handle at the bottom; the tapered bushing has a through hole A with an internal thread in the center, which mates with the external thread of the bolt; the tapered bushing includes a positioning part of equal thickness and a tapered enlarging part, the taper of which matches the upper edge of the hole to be enlarged of the rivet nut; and the vertical downward movement of the bolt expands the edge of the hole to be enlarged outward.

2. The hole-reaming device for riveting nuts according to claim 1, characterized in that: The internal thread handle is plate-shaped, with one end having a transitional shape between a circular arc segment and a straight line segment, and a through hole B is opened on the circular arc segment.

3. The hole-reaming device for riveting nuts according to claim 1, characterized in that: A washer is added between the internal thread handle and the rivet nut.

4. The hole-reaming device for riveting nuts according to claim 3, characterized in that: The washer has a through hole C in the center and is fitted onto the bottom of the external thread of the bolt.

5. The hole-reaming device for riveting nuts according to claim 3, characterized in that: The washer is made of aluminum alloy.

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