JPH02187223A - Caulking device for sheet metal - Google Patents

Abstract

PURPOSE:To correct the position of a sheet metal before it is caulked by making a holding sheet metal forcedly and variably advancing a pressure member before the sheet metal is caulked. CONSTITUTION:When the sheet metal 3 is caulked, a holding cylinder 13 abuts with the sheet metal 3 before the pressure head 15 abuts with it and the sheet metal 3 is inserted and held freely slidably between a supporting member 7 and the holding cylinder 13. Then, a pressure head 15 abuts with the caulking position of the sheet metal 3. Consequently, the time to move the desired caulking position on the sheet metal 3 to the actual caulking position is secured further to the difference between the times for which the holding cylinder 13 and the pressure head 15 respectively are abutted with the sheet metal 3. Thus, the position of the sheet metal can be corrected before the sheet metal is caulked.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet metal caulking device, and more particularly to an improvement of a rivetless sheet metal caulking device that can caulk a sheet metal itself by plastically deforming it.

[Prior art]

In the conventional glue bedless caulking device as described above, the two sheet metals to be overlapped are supported on a support member toward a predetermined caulking device, and are pressed against the support member by a pressure member operated by a hydraulic piston mechanism. sandwiched between. Then, as the pressure member continues to press the sheet metal, the two sheet metals are caulked according to the shape of the caulking groove formed on the sheet metal support surface of the support member, and 1, are joined to each other.

In this way, the conventional glue bedless sheet metal caulking device can plastically deform the sheet metal itself for caulking, eliminating the need for rivets as caulking members and eliminating the need to drill pilot holes into the sheet metal to insert the rivets. Since there is no hole, there is no need for the step of forming a pilot hole, and there is no punching residue.Therefore, the above sheet metal crimping device
It was excellent in that it did not contaminate the working environment and was easy to work with.

[Problem to be solved by the invention]

However, in the conventional sheet metal caulking device as described above, since the caulking operation is performed at the same time as the sheet metal is supported by the support member, there is no time to accurately align the caulking position with the position held by the support member, and the caulking point The disadvantage was that the positioning accuracy was poor. Furthermore, since the sheet metal is only manually attached to the support member, there is a problem in that the sheet metal moves slightly just before the caulking operation and may be worn away from the desired caulking position.

As described above, the sheet metal caulking device described above has the problem that the positioning accuracy is not sufficient, and furthermore, the labor and effort required to compensate for the positioning accuracy is increased.

Therefore, the purpose of the present invention is to create a simple display,
To provide a sheet metal crimping device capable of slidably holding a sheet metal with a relatively weak force before crimping operation and having high positioning accuracy.

[Means to solve the problem]

In order to achieve the above object, the main means adopted by the present invention are: a pressurizing part body; a cradle body connected to the cradle body, and a pedestal body provided on the pressurizing part body side,
A pressure member that reciprocates so as to press two sheet metals inserted in an overlapping manner between the pressure unit main body and the cradle body, and a pressure member that is provided on the cradle body side and that is similar to the pressure member. A sheet metal caulking device comprising: a pedestal shaft; and a support member disposed at the tip of the pedestal shaft for holding the sheet metal between the pressing member and tightening the sheet metal to each other. , a holding member that is slidably provided between the inner wall of the pressure section main body and the pressure member and that holds the sheet metal between the support member and the support member when the sheet metal is caulked; In this case, the holding member is provided with a time difference clamping means for clamping the sheet metal before the pressing member, and a pressing force setting means for setting the pressing force of the pressing member against the sheet metal to be larger than the pressing force of the holding member. This is a sheet metal caulking device characterized by the following.

[Effect]

According to the present invention, when hydraulic pressure is applied within the pressurizing section main body, the pressurizing force applied to the pressurizing member and the holding member urges each of them in the caulking direction.

Here, the holding member clamps the sheet metal prior to the pressing member by the time difference clamping means. Further, since the pressing force applied to the sheet metal by the holding member is weak, the sheet metal can be freely slid while being clamped by the holding member, and the caulking position of the sheet metal can be set with high accuracy by visual inspection. Thereafter, the pressing member presses the sheet metal between the pressing member and the supporting member with a large force set by the pressing force setting means, and the caulking operation is completed once.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following examples are examples embodying the present invention, and are not intended to limit the technical scope of the present invention.

Here, FIG. 1 is a side sectional view of a sheet metal caulking device according to an embodiment of the present invention, FIG. 2 is a side sectional view of the sheet metal caulking device showing a state in which the holding cylinder is in contact with the sheet metal, and FIG. State explanatory diagram showing the state in which the sheet metal is caulked by the pressure head, No. 4
The figure is a side sectional view of a sheet metal caulking device according to another embodiment of the present invention.

As shown in FIG. 1, the sheet metal caulking device 1 according to the present embodiment includes a pressurizing section main body 2 that houses pressurized oil used in a hydraulic operating mechanism, and presses two sheet metals 3 with the pressurizing force of the pressurized oil. A pressure member 4 that crimps the sheet metal 3, a holding member 5 that holds the sheet metal 3 stationary immediately before crimping, and a support member 7 that supports the sheet metal 3.
, a pedestal shaft 8 whose tip crushes the sheet metal between the tip of the pressure member 4, and a pedestal main body 9 which pivotally supports the pedestal shaft 8;
The pressure member 4. The above-mentioned holding member 5. A connecting portion 11 that faces and integrally connects the pressure section main body 2 and the pedestal main body 9 so that the respective axes of the support member 7 and the pedestal shaft 8 are located concentrically. It is composed of.

In the above elements, the pressure member 4 and the holding member 5 constitute the pressure member 6, and the support member 7. The pedestal shaft 8 and the pedestal main body 9 constitute a pedestal portion IO.

Furthermore, in this embodiment, the holding member 5 is made up of a first piston 12 operated by pressure oil and a holding cylinder 13 disposed at the tip of the first piston 12. It consists of a second piston 14 that is hydraulically operated, and a pressure hand 15 placed at the tip of the second piston 14.

In this embodiment, the pressurizing section main body 2 has a cylindrical cylinder structure, and the first piston 12 is slidably inserted into the inner wall thereof.

The first piston 12 is made up of two cylindrical parts with different inner diameters and outer diameters, a step part 16 is formed on the inner diameter side of the boundary part of each part, and a ring 17 is attached to the inner diameter side end of the large diameter cylindrical part. ing.

The holder 1'1i13 is a cylindrical body whose outer diameter at its tip is equal to or larger than the outer diameter of the support member 7, and is screwed onto the tip of the first piston 12 in the caulking direction (arrow 18).

The second piston 14 is a cylindrical body that opens toward the upstream side in the caulking direction, and has a screw 19 at its inner bottom.
is screwed and slidably inserted into the inner wall of the first piston 12, and one end is locked to a bottle 21 pivotally supported by the oil inlet/outlet nozzle 20, and the other end is locked to a screw 19. It is urged toward the upstream side in the caulking direction by a spring 22.

At this time, the first piston 12 has a second piston attached to its ring 17.
The ends of the piston 14 in the biasing direction come into contact and elastically bias the second piston 14 in the upstream direction (1) in the caulking direction. Here, 23 and 24 are seal members, respectively.

The pressure head 15 is a substantially cylindrical body with a thin tip, and is slidably inscribed in the inner circumferential surface of the holding cylinder 13.
The second piston 14 is screwed to the downstream (II) end in the caulking direction.

Further, a second piston 12 with respect to the first piston 12 is provided on the upstream side in the caulking direction of the stepped portion 16 of the first piston 12 and between the inner circumferential surface of the first piston 12 and the outer circumferential surface of the second piston 14.
A movement allowance 25 for the piston 14 is formed. The length of the moving member 25 in the axial direction is the same as that of the first piston 12.
The moving distance of the second piston 14 relative to the distance is defined.

The pedestal shaft 8 is formed to be thin on the upstream side in the caulking direction and thick on the downstream side, and a support flange 26 protrudes perpendicularly to the axial direction along the outer periphery of the large shaft portion at the boundary between the thin shaft portion and the thick shaft portion. It is formed by The pedestal shaft 8 is located approximately at the center of the thin shaft portion in the axial direction so as to be parallel to the support collar 26.
While the fitting collar 27 is formed, its thick shaft portion is attached to the cylindrical cradle main body 9? ! The tip of the li is inserted into the nut 28
It is fixed by.

The support member 7 is a cylindrical body that can be freely divided into two parts in the axial direction, and has a ring groove 29 formed along its outer circumferential direction. The ring 629 accommodates an elastic ring 30 that is configured to bias toward the axis in order to unite the support member 7 that can be divided into two. A fitting i$131 is formed along the inner circumferential direction of the support member 7.

The fitting groove 31 is formed to fit into the fitting collar 27 of the pedestal shaft 8. Furthermore, the pedestal part 1O and the pressure part 6 have arms bent in a substantially C-shape on the side, and a connecting part 11 having a thick reinforcing edge 32 formed on the edge allows the shafts of each to be fixed. They are integrally connected so that

The time difference pressing means in this embodiment is such that when the sheet metal 3 is caulked, the holding member 5 presses the sheet metal 3 before the pressing member 4 does.
upward in the caulking direction so as to pinch the f! The support member 7 is constructed to protrude from the pedestal shaft 8 toward the L side, that is, a caulking groove portion 33 is formed between the support member 7 and the pedestal shaft 8.

Further, the pressurizing force setting means includes a pressurizing member 4 against the sheet metal 3.
The pressure-receiving cross-sectional area of the second piston 14 is designed to be much larger than that of the first piston 12 so that the pressing force of the second piston 14 is set to be larger than the pressing force of the holding member 5.

In the sheet metal caulking device l configured as described above,
When caulking the sheet metals 3, the two superimposed sheet metals 3 are first placed on the upper surface of the support member 7 (on the upstream side in the caulking direction) so that the preset caulking position is located at the axis of the pedestal shaft 8. surface).

Then, when the pressure oil is gradually injected into the pressurizing section main body 2 from the oil outlet nozzle 20, a pressurizing force in the caulking direction is generated on each of the first piston 12 and the second piston 14. However, at this time, the second piston 14 is urged toward the upstream side in the caulking direction by the spring 22, and the first piston 12
The second piston 1 described above is slidable with respect to the piston 14 and is not subjected to resistance in the caulking direction.
When the pressing force applied to the second piston 14 exceeds the biasing force of the spring 22, the second piston 14 begins to move in the caulking direction. The first piston 12, which has a relatively small resistance compared to the second piston 14, has a ring 17 that is connected to the second piston 12.
While in contact with the upstream end of the piston 14 in the caulking direction,
In other words, the respective tips of the holding cylinder 13 and the pressurizing head 15 move toward the sheet metal 3 placed on the support member 7 while being substantially flush with each other in the caulking direction.

When the holding cylinder 13 and the pressure head 15 further descend, the second
As shown in the figure, the respective tips of the holding cylinder 13 and the pressure head 15 come into contact with the sheet metal 3 at almost the same time, and the holding cylinder 13 first presses the sheet metal 3 between it and the support member 7. Hold.

At this time, since the pressure receiving area of the first piston 12 is much smaller than the pressure receiving area of the second piston 14, the holding member 13
The pressurizing force on the sheet metal 3 is relatively small, and the sheet metal 3 held as described above has its caulking position a at the pressurizing head 1.
5, the position can be slid and moved while not being significantly plastically deformed. That is, even if the portion on the sheet metal 3 that the holding cylinder 13 abuts is at a position where it has been worn away from the desired preset caulking position, the actual caulking position a
It can be modified and moved. This improves the positioning accuracy of the caulking work.

If the supply of pressure oil is continued in this state, the second piston 1
4! l! ! 1 descends relative to the piston 12,
The pressure head 15 at the tip presses down the caulking position a.

In this way, the pressing head 15 presses the sheet metal 3 with a much larger pressing force than the holding cylinder 13.

As a result, the two superimposed sheet metals 3 fit into the caulking groove 33 of the support member 7 together with the tip of the pressure head 15, are plastically deformed, are squeezed between the tip of the pedestal shaft 8, and , crushed and caulked.

At this time, the support member 7 is divided into two parts, each of which is retracted by the thickness of the plastically deformed sheet metal 3 in the outer radial direction (FIG. 3).

Therefore, the sheet metal 3 is not sheared in the caulking groove portion 33, and the hydraulic pressure is released and the first and second pistons 1
Even after pulling up 2.14, it can be easily removed from the support member 7. After the sheet metal 3 is removed, the support member 7 is assembled by an elastic ring 30 that urges it in the axial direction.

In the embodiment described above, the tips of the holding cylinder 13 and the pressurizing rod 15 are substantially flush with each other in the direction of caulking, but the sheet metal caulking device 18 according to another embodiment is As shown in the figure.

Here, the sheet metal caulking device 11 according to this embodiment has a first
The difference from the sheet metal caulking device 1 according to the embodiment is that the pressurizing member 4. When the ends of the holding fli 13 come into contact with each other, the tip of the holding fli 13 is in a state where it has advanced further toward the pedestal portion lO than the tip of the pressurizing rod 15°.

When caulking the sheet metal 3, the holding cylinder 13 is moved by the pressure head 15. 0, which comes into contact with the sheet metal 3 prior to and holds the sheet metal 3 by pressing it with the supporting member 7 so as to be slidable.
The pressure head 151 comes into contact with the caulking position 3 of the sheet metal 3.

Thereby, more time is secured for moving the desired caulking position on the sheet metal 3 to the actual caulking position by the difference in time during which the holding cylinder 13 and the pressurizing head 15m contact the sheet metal, respectively.

In each of the above-mentioned examples, two superimposed sheet metals 3 were caulked, but the number of superposed sheet metals 3 was three.
It should be noted that even if the sheet metals 3 are made of sheets, each sheet metal 3 can be firmly caulked in one direction with a constant degree of caulking.

〔Effect of the invention〕

As described above, the present invention provides a pressurizing section main body, a pedestal main body disposed opposite to the pressurizing section main body and integrally connected to the pressurizing section main body, and a pressurizing section main body. a pressure member that is provided on the side and moves back and forth so as to press two sheet metals that are overlapped and inserted between the pressure section main body and the pedestal main body;
A pedestal shaft is provided on the pedestal main body side and is connected to the pressure member; A sheet metal caulking device comprising a support member for caulking, which is slidably provided between an inner wall of the pressurizing section main body and the pressurizing member, and the support member is provided when caulking the sheet metal. a holding member that clamps the sheet metal between the sheet metal; a time difference pressing means for the holding member to clamp the sheet metal before the pressing member when caulking the sheet metal; and a holding member that applies the pressing force of the pressing member to the sheet metal. The sheet metal crimping device is characterized in that it is equipped with a pressing force setting means that is set to be larger than the pressing force of the sheet metal crimping device.
Since the holding member displaceably presses the sheet metal prior to the pressing member before caulking the sheet metal, the position of the sheet metal can be corrected before caulking.

Furthermore, even when the sheet metal is caulked, the holding member always performs a constant caulking operation of the sheet metal, so that variations in the degree of caulking of the sheet metal are reduced.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a sheet metal caulking device according to an embodiment of the present invention, FIG. 2 is a side sectional view of the sheet metal caulking device showing a state in which the holding cylinder is in contact with the sheet metal, and FIG. 3 is a pressurized A state where the sheet metal is caulked by the head! ! FIG. 4 is a side sectional view of a sheet metal caulking device according to another embodiment of the present invention. [Explanation of symbols] 1.1. ... Sheet metal caulking device 2 ... Pressure section main body 3 ... Sheet metal 4.4□ ...
- Pressure member 5... Holding member 7... Supporting member 8...
- Cradle shaft 9... Cradle body 11... Connection portion 12... First piston 13... Holding cylinder 14... Second piston 15.15. ...
Pressure head 22...spring.

Claims (1)

[Claims] 1. A pressurizing section main body, a pedestal main body disposed opposite to the pressurizing section main body and integrally connected to the pressurizing section main body, and a side of the pressurizing section main body. a pressure member provided on the side of the pedestal body and reciprocating so as to press two sheet metals inserted overlappingly between the pressure part body and the pedestal body; A pedestal shaft coaxial with the pressure member, and a support member disposed at the tip of the pedestal shaft for holding the sheet metal between the pressure member and caulking each other. In the sheet metal caulking device, the holding member is slidably provided between the inner wall of the pressure section main body and the pressure member, and holds the sheet metal between the support member and the support member when the sheet metal is caulked. , time difference clamping means in which the holding member clamps the sheet metal before the pressing member when caulking the sheet metal; and pressure setting means for setting the pressing force of the pressing member against the sheet metal to be larger than the pressing force of the holding member. A sheet metal caulking device comprising: