TWM461708U - Caulking hole structure with spurs-reduced - Google Patents

Description

Reduces the burr hole structure of the burr

The invention relates to a riveting joint technology, in particular to a riveting hole structure capable of reducing burrs to improve the quality of the riveted joint object.

Riveting is a commonly used bonding method, which can firmly combine two objects. However, the existing riveting is mainly to provide riveting holes on the object, and then a riveting column is passed through the riveting holes, and an end of the stud is formed by punching or the like. The part is used to combine the two objects, and the existing object is drilled by the drill when the riveting hole is provided, and the punching is also used.

When the rivet hole is formed by punching, the burr 52 is easily formed around the inner end of the existing rivet hole 50 when the rivet hole 50 is formed by punching the object with a tool such as a punch. When the object is coupled with the rivet, the burr 52 may be separated from the rivet hole 50 by the pushing of the rivet, thereby forming debris, so that the debris may fall from the object from time to time, thus easily affecting the object combination. At the same time, if the riveted object is an object with a circuit layout such as a circuit board, a lead frame and a heat sink, the fallen debris is more likely to affect the electrical connection between the combined objects, thereby causing electrical problems. There is a need to improve.

In order to solve the shortcomings and limitations of the existing rivet hole structure and use, the main purpose of the present invention is to propose a rivet hole knot which can reduce burrs. The structure can reduce the burrs formed by the rivet holes during molding, and avoid the burrs from falling randomly, so as to achieve the purpose of improving the quality of the riveted joint of the objects.

The present invention solves the prior art problem and can reduce the burr staking hole structure. The rivet hole is disposed on the body of the object and penetrates the body. The rivet hole includes a riveting section and an enlarged section, and the enlarged section is formed. The one end of the riveting section is located on one side of the body, and the inner diameter of the enlarged section is larger than the inner diameter of the riveting section, and a difference step is formed between the riveting section and the enlarged section.

The technical means of the novel can utilize the setting of the enlarged section to make the burr formed by the rivet hole compact during the molding to reduce the burr, and can avoid the burr arbitrarily falling off after the object is riveted and joint, thereby affecting the quality of the object combination. .

"This New Type"

10‧‧‧First object

11‧‧‧Ontology

20‧‧‧Riveted holes

22‧‧‧Riveting section

24‧‧‧ Expanded paragraph

30‧‧‧Second objects

32‧‧‧ Rivet

Prior Technology

50‧‧‧Riveted holes

52‧‧‧ burrs

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of a preferred embodiment of the present invention and a studed article.

2 is a perspective, cross-sectional view of the preferred embodiment of the present invention in combination with a stud object.

Figure 3 is a cross-sectional view of the preferred embodiment of the present invention in combination with a stud object.

Figure 4 is a schematic cross-sectional view showing the preferred embodiment of the present invention.

Figure 5 is a partially enlarged cross-sectional view of the preferred embodiment of the present invention.

Fig. 6 is a partially enlarged cross-sectional view showing a conventional staking hole.

In order to understand the technical features and practical functions of the present invention in detail, and in accordance with the contents of the specification, the following is further described in detail with reference to the preferred embodiment shown in the drawings: The new type can be seen from the figure The rivet hole 20 is mainly disposed on the body 11 of the first object 10 and extends through the body 11 , wherein the rivet hole 20 includes a rivet section 22 and an enlarged section 24 , and the enlarged section 24 is formed on the rivet section 22 . One end is located on one side of the body 11, the inner diameter of the enlarged section 24 is larger than the inner diameter of the riveting section 22, and a difference is formed between the riveting section 22 and the enlarged section 24, and the inner diameter of the enlarged section 24 is The boundary is between 0.8 and 1.5 mm, and the depth of the enlarged section 24 can be between 0.01 and 0.10 mm, and the ratio of the inner diameter to the depth of the enlarged section 24 (ie, the inner diameter/depth) is 8 to 150. good.

When forming the riveting hole of the present invention, please refer to FIG. 4 and FIG. 5, and a riveting section 22 penetrating the body 11 may be formed on the body 11 by means of punching, and then another punch is used to cooperate with the punching method. An enlarged section 24 is formed on one side of the rivet section 22 on one side of the rivet section 22, and the burr formed around the rivet section 22 can be used to reduce the burr downwardly and inwardly by the second punching during the first press forming. And make the loose burrs firm and not easy to fall.

Therefore, when the first object 10 having the rivet hole 20 of the present invention combines the two objects 10, 30 by the rivet 32 of the second object 30, the burr formed in the rivet hole 20 is compacted. Therefore, it is not easy to loosen and fall due to the pushing of the stud 32, especially when the object with circuit or electrical connection is combined, for example, the first object 10 can be a copper lead frame, and the second object 30 is a heat sink. Or the circuit board, etc., it will not affect the electrical connection of the object due to the falling of the burr, which can improve the quality of the riveting of the object, and avoid the burr falling and affect the normal operation of the object. In addition, the rivet hole 20 of the new enlarged section 24 can be applied to various items and occasions which are riveted to each other such as a stud or a rivet, and the utility model of the present invention can be improved.

It is apparent that the various modifications and changes can be made without departing from the spirit and novel concept of the present invention, and the specific embodiments disclosed herein are not intended to limit the present invention. All modifications in the scope of the appended patent application.

10‧‧‧First object

11‧‧‧Ontology

20‧‧‧Riveted holes

22‧‧‧Riveting section

24‧‧‧ Expanded paragraph

30‧‧‧Second objects

32‧‧‧ Rivet

Claims (6)

A riveting hole structure for reducing burrs, the rivet hole is disposed on a body of the object and penetrates the body, the rivet hole includes a riveting section and an enlarged section, and the enlarged section is formed at one end of the riveting section and is located at On one side of the body, the inner diameter of the enlarged section is larger than the inner diameter of the riveting section, and a difference is formed between the riveting section and the enlarged section. The riveted hole structure of the burr according to claim 1, wherein the ratio of the inner diameter to the depth of the enlarged section is 8 to 150. The riveting hole structure of the burr according to claim 1, wherein the inner diameter of the enlarged section is between 0.8 and 1.5 mm, and the depth of the enlarged section is between 0.01 and 0.10 mm. The riveted hole structure of the burr according to claim 2, wherein the inner diameter of the enlarged section is between 0.8 and 1.5 mm, and the depth of the enlarged section is between 0.01 and 0.10 mm. The riveted hole structure of the burr according to any one of claims 1 to 4, wherein the object is a lead frame. The riveted hole structure of the burr can be reduced as described in claim 5, wherein the object is a lead frame made of copper.