JPS63126628A - Joining body for plate like member - Google Patents

Abstract

PURPOSE:To improve the efficiency in joining by forming a cylindrical insert body on a 1st plate like member by burring, forming a fitting hole on a 2nd plate like member as well, then, expanding the insert body by pressing it to the counter sinking part of the fitting hole. CONSTITUTION:The insert body 5 having the thickness t2 equivalent to a plate thickness t1 by burring on a 1st plate like member 4 and plural slits 6 are formed at its tip. A fitting hole 2 is provided by punching on the last member 1 and a groove 3 is radially formed as well, further, a counter sink part 20 is worked by a press. In case of joining the plate like member 4 and 1, the insert body 5 of the member 4 is inserted into the fitting hole 2 of the member 2 and expanded by pressing it with the movable die 7 fitted to the press to perform the joining. A strong joining without any deformation can be performed with the presence of the slit 6 and groove 3. Moreover, the joining work time is shortened as well and the joining efficiency and intensity are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joined body of plate-like members such as metal plates.

[Conventional technology and its problems]

Conventionally, the methods for joining plate-shaped members include: (1) If the plate-shaped members are metal, they are joined together by welding; (2) Through-holes are formed between the plate-shaped members, and the through-holes are overlapped and rivets are inserted and then tightened. ■A screw hole is formed in one plate member, a through hole is provided in the other plate member, the screw hole and the through hole are overlapped, a screw is inserted, and the screws are joined by tightening the screw. be.

However, when the two metal plates are joined by welding as described in (1) above, distortion occurs in both metal plates due to welding heat, making it impossible to obtain dimensional accuracy.

In addition, the method (2) of inserting and tightening the studs not only requires a large pressing force to crush the studs when tightening, but also requires a large number of steps and parts for inserting the studs. In addition, in the case of thin plates, the pressure applied during squeezing causes distortion in metal plates, and in the case of brittle materials, chips and cracks occur.

Furthermore, the joining method by screw tightening (■) requires machining an internal thread on one member, which not only requires a long machining time, but also requires a screwing process to connect the two members with a countersunk screw. There were major problems in terms of improving work efficiency, such as the need for steps such as inserting spring washers and applying adhesive to prevent screws from loosening.

[Object 1 of the present invention] In view of the above-mentioned problems, the present invention provides a joined body of plate-like members that is easy to process and has stable joint strength, while reducing the steps required for joining plate-like members and the number of parts required for joining. A cylindrical insert in which a suitable number of cuts are made at the tip by applying burring by pressing to the joint of a first plate-like member made of a material that can be plastically deformed by machining, such as metal. a mounting hole is formed in the joint portion of the second plate-like member made of metal or other material at a position corresponding to the insert of the first plate-like member, and the mounting hole is formed on the opposite side of the joint surface. A countersunk portion is provided in the hole, the insert of the first plate-like member is inserted into the mounting hole, and the tip of the insert is pressed and expanded in the countersunk portion of the mounting hole. , characterized in that the first and second plate members are joined to each other.

〔Example〕

The present invention will be explained in more detail with reference to embodiments shown in the drawings.

1 is a plan view of a holding frame for positioning an electromagnet fixed core used in an electromagnetic contactor, and FIG. 2 is a sectional view taken along line 1-1 in FIG. 1.

The code (1) is a holding frame for positioning the fixed core, and the holding frame (
1) shows the case where a steel plate is used in this case, and mounting holes (2) are provided at four locations by punching with a press. This mounting hole (2) is provided with grooves (3) at four radial locations. The groove (3) is used in the holding frame (1) as a relief for the excess thickness of the part that bulges and deforms due to compression when one inner edge of the mounting hole (2) provided in the steel plate is countersunk by pressing.
This prevents the outer surface from swelling and ensures component accuracy.

A countersunk portion (20) is formed by pressing on the inner edge of the mounting hole (2) on the surface side. FIG. 3 is a plan view of the substrate to be joined to the holding frame, and FIG. 4 is a cross-sectional view taken along the line ■--■ in FIG. In this case, a steel plate is used for the substrate (4), and a cylindrical insert (5) having a thickness t2 approximately equal to the plate thickness t1 of the substrate (4) is inserted by burring into the mounting hole (1) of the holding frame (1). 2), and insert the inserts (
Cuts (6) are provided at four locations at the tip of 5). This cut (6) allows the insert (5) to be easily pushed and expanded by the movable mold (7) of the press when the insert (5) provided on the substrate (4) is pressed and expanded. When the insert body (5) is inserted, its tips are split equally and engaged and crimped, so that the outer peripheral surface (9) of the insert body (5) is connected to the inner surface (8) of the countersunk portion (20) of the holding frame (1). This is to ensure that it is in close contact with the In this case, the height of the insert (5) is set to be approximately the same as the thickness t3 of the holding frame (1).

The number of cuts (6) can be selected arbitrarily depending on the shape of the joint,
Arrangement 4 is also arbitrary, but an arrangement that divides the lake into equal parts is preferable because the shark strength is averaged.

Fig. 5 is a cross-sectional view of the insert (5) provided on the board fitted into the mounting hole (2) provided in the holding frame (1), and Fig. 6 is a cross-sectional view of the insert (5) fitted into the mounting hole (2) provided on the holding frame (1). FIG. 3 is a cross-sectional view showing a state in which the holding frame is joined. As shown in Figure 5, the insert (5) provided on the substrate (4) is fitted into the mounting hole (2) provided on the holding frame (1), and from this state the holding frame (1) is attached to the press.
A movable mold (7) having a conical shape θ2 equal to the countersunk angle θ1 of the countersunk portion (20) moves in the Y direction.

Push out the insert (5) provided on the board (4) and attach it to the holding frame (
The outer peripheral surface (9) of the insert (5) is brought into close contact with the countersunk surface (8) of the countersink hole (2) provided in step 1) to complete the joining of the substrate and the holding frame.

The tip end of the insert (5) is dimensionally adjusted or press-worked so as not to touch the outer surface (1a) of the joint part of the holding frame (1).

In the above, if the holding frame (1) is a metal plate such as a steel plate, the countersinking part is created by cutting, because the punching process using a press, the countersunking process using a drill press, and the processing machine are different. In this case, press forming is used because there is a time loss in transporting the parts between the two processes, which hinders the improvement of drawing efficiency. That is,
A mounting hole with an arbitrary number of grooves on the inner periphery is formed by punching the plate-like member of the holding frame (1) with a press, and one inner edge of the mounting hole is further pressed with a press to create a taper. It is something to do. Note that generally the holding frame (1
) If the plate-like member corresponding to () is made of a non-metallic material such as a molded insulator, the above consideration is not necessary since the countersunk portion is formed by molding.

In the above example, the holding frame (1) and the substrate (4)
The explanation has been given mainly on the case of a metal plate, but in the present invention, the substrate (4) is a first plate-like member made of a material that can be plastically deformed by machining, such as a metal. , is generally applied when the holding frame (1) is used as a second plate-like member made of metal or other general material, and the first and second plate-like members are joined to form an integrated body. It is something that

〔Effect of the invention〕

As is clear from the above description, the joined body of plate-like members according to the present invention is a cylindrical insert in which a first plate-like member is subjected to a purling process using a press to provide an appropriate number of cuts at the tip. forming a body, and attaching the first plate member to the joint part of the second plate member.
forming a mounting hole at a position corresponding to the insert of the plate-like member;
A countersunk part is provided in the mounting hole on the opposite side of the joint surface, the insert body is inserted into the mounting hole, the tip of the insert body is fitted in the countersunk part of the mounting hole, and the first and second plates Since the shaped members are joined to each other, there is a process of aligning the through holes and inserting a rivet, or a process of carving a screw hole in one of the through holes, and then aligning the through holes and inserting a screw and tightening it. This is a joined body of plate-like members that does not require the above, shortens the joining work time, increases the joining efficiency of plate-like members, is easy to process during joining, and has stable joint strength. In addition, the insertion body was press-processed so that it could be easily pressed and expanded by making an appropriate number of cuts at the tip of the insert body, and did not come out from the outer surface of the member, making it easy to assemble this joined body with other parts. It can prevent harmful protrusions from forming when attaching, and
This has the effect of ensuring component accuracy.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a fixed core holding frame used in an electromagnetic contactor, Fig. 2 is a sectional view taken along line 1-1 in Fig. 1, and Fig. 3 is a plan view of the substrate to be joined to the holding frame. Figure 4 shows n-n in Figure 3.
A cross-sectional view along the line, Figure 5 is a cross-sectional view of the insert provided on the board fitted into the mounting hole provided in the holding frame, and Figure 6 is a cross-sectional view of the insert provided on the board fitted into the mounting hole provided in the holding frame, and Fig. 6 is a press processing of the insert to join the board and the holding frame. FIG. (1): Holding frame (second plate member) (2): Mounting hole (2
0) : Countersunk part (3) : Groove (4) Two substrates (first plate member) (5) : Insert (6)
：Cut

Claims (1)

[Scope of Claims] 1. A cylindrical shape in which an appropriate number of cuts are made at the tip by applying burring by pressing to the joint portion of the first plate member made of a material that can be plastically deformed by machining, such as metal. A mounting hole is formed in the joint part of the second plate-like member made of metal or other material at a position corresponding to the insert of the first plate-like member, and a mounting hole is formed on the opposite side of the joint surface. A countersunk portion is provided in the mounting hole, the insert of the first plate-like member is inserted into the mounting hole, and the tip of the insert is pressed and expanded in the countersunk portion of the mounting hole. A joined body of plate-like members, characterized in that the first and second plate-like members are joined together by pressing. 2. The joined body of plate-like members according to claim 1, wherein the caulking tip of the insert is pressed so that it does not protrude from the countersunk portion of the mounting hole.