JPS6350038Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> The present invention involves inserting a cylindrical part of a second part into a cylindrical part with a bottom of the first part, and cutting the edge of the cylindrical part with a bottom of the first part. The present invention relates to a crimping device that allows the crimping force and crimping height to be respectively defined when fixing a second component by crimping.

<Prior Art> As a conventional crimping device, there is one shown in FIG. 1, for example. This is used when inserting and caulking the cylindrical part 2a of the second part 2 into the bottomed cylindrical part 1a of the first part 1, and the second part 2 is housed in the lower part of the frame 10. 1st part 1
A guide 11 is provided for holding the. Further, a hydraulic cylinder 12 is provided at the upper part of the frame 10, and a rod 14 is configured to stroke in the vertical direction together with a piston 13 of the hydraulic cylinder 12. 15 is an adjustable stopper. And Rod 14
The end edge 1b of the bottomed cylindrical portion 1a of the first component 1 is caulked by the taper at the lower end of the cylindrical caulking portion 16 formed at the lower end.

However, in the case of such conventional caulking devices, the height after caulking (for example, the height H from the reference plane as shown in Fig. 2) is kept constant, and the caulking force (rotational torque) is kept constant. I couldn't keep it constant. This is because if you specify the crimping height, the crimping force will fluctuate, and if you specify the crimping force,
This is because the caulking height changes. Therefore, if the height is specified and the rotational torque after caulking is specified, it is difficult to satisfy both requirements.

<Purpose of the invention> In view of the above-mentioned conventional problems, it is an object of the present invention to provide a crimping device that can independently define the crimping force and the crimping height.

<Configuration of the invention> For this reason, the present invention uses a hydraulic cylinder to
A cylindrical first caulking member that strokes in the axial direction of the bottomed cylindrical part of the part and has a taper or radius on its tip surface that acts on the end edge thereof, and a separate hydraulic cylinder independently of the first caulking member. and a second caulking member that strokes the inner side in the same direction and acts on the tip of the edge, and the first caulking member defines the caulking force, and the second caulking member defines the caulking height. This is what I did.

<Example> An example shown in FIGS. 2 and 3 will be described below.

First, the workpiece will be explained with reference to FIG. The first component 1 is, for example, a nozzle holder for a fuel injector, and has a bottomed cylindrical portion 1a at one end. The second component 2 is, for example, a nozzle body, and has a cylindrical portion 2a. And the first part 1
The cylindrical part 2a of the second part 2 is attached to the bottomed cylindrical part 1a of
It is now possible to insert . In addition, the first part 1
A third component 3, which is a stopper plate, for example, is inserted between the bottom of the bottomed cylindrical portion 1a (more specifically, the stepped portion) and the second component 2. Then, the end edge 1b of the bottomed cylindrical portion 1a of the first component 1 is caulked to fix the second component 2. At this time, the caulking force (rotational torque) must be constant and the It is required that the caulking height H from the flange portion 1c (reference plane) to the tip portion 1d of the caulked edge 1b be constant.

Next, the crimping device will be explained with reference to FIG.

A guide 11 is provided at the bottom of the frame 10, and a first
Part 1 is now set.

A hydraulic cylinder 12 is fixed to the upper part of the frame 10, and a rod 14 integrated with a piston 13 disposed within the hydraulic cylinder 12 is connected to the hydraulic cylinder 1.
It passes through 2 from top to bottom. An adjustable stopper 15 is provided at the upper end of the rod 14.

A piston 17 is integrally attached to the lower end of the rod 14, and a movable hydraulic cylinder 18 is slidably attached to the piston 17.

Here, a first caulking part 19 having an annular taper or radius is formed around the penetrating part of the rod 14 (second caulking part 21 described later in detail) on the lower end surface of the movable hydraulic cylinder 18, and this first caulking part 19 is the end edge 1 of the bottomed cylindrical portion 1a of the first part 1
It has become relative to b. Therefore, the lower chamber 2 with respect to the piston 17 of the movable hydraulic cylinder 18
By supplying hydraulic pressure to 0, the movable hydraulic cylinder 18
When it moves downward, caulking is performed.

The lower end of the rod 14 passing through the lower end of the movable hydraulic cylinder 18 has a cylindrical shape, and a second crimped portion 21 is formed on the lower end. It is adapted to face the tip of the slanted edge 1b. Therefore, the piston 1 of the hydraulic cylinder 12
When the rod 14 is moved downward by supplying hydraulic pressure to the upper chamber 22 than the rod 14, caulking is performed.

Thus, when performing caulking work, a certain amount of hydraulic pressure is supplied to the hydraulic chamber 20 of the movable hydraulic cylinder 18 to move the movable hydraulic cylinder 18 downward, and the first caulking part 19 closes the bottomed part of the first part 1. Cylindrical part 1
Caulk the edge 1b of a.

Next, hydraulic pressure is supplied to the hydraulic chamber 22 of the hydraulic cylinder 12 to move the rod 14 downward until it is regulated by the stopper 15. The tip portion 1d is caulked, and at this time, the caulking height H is defined.

Next, hydraulic pressure is supplied to the hydraulic chamber 20 of the movable cylinder 18 again to move the movable hydraulic cylinder 18 downward,
The end edge 1b is caulked again by the first caulking portion 19, and at this time the caulking force is defined. Of course, this step may be omitted and the crimping force may be determined during the initial crimping by the first crimping portion 19.

If it is above, the caulking height and the caulking force can be kept constant.

<Effects of the invention> As explained above, according to the invention, the part that defines the crimping force and the part that defines the crimping height are divided, so that the crimping force and the crimping height can be adjusted to the respective desired values. The effect is that the value can be set to .

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a conventional crimping device. 2 and 3 show an embodiment of the present invention, in which FIG. 2 is a sectional view of a workpiece, and FIG. 3 is a schematic sectional view of a caulking device. 1... First part, 1a... Bottomed cylindrical part, 1b
...Edge, 2...Second part, 2a...Cylindrical part,
12... Hydraulic cylinder, 14... Rod, 18...
...Movable hydraulic cylinder, 19...First caulking part, 2
1...Second caulking part.

Claims (1)

[Scope of utility model registration request] A device for fixing the bottomed cylindrical part of the first part by caulking the end edge of the bottomed cylindrical part of the first part in a state where the cylindrical part of the second part is inserted into the bottomed cylindrical part of the first part. a cylindrical first caulking member that strokes in the axial direction of the bottomed cylindrical portion of the component and has a taper or radius on its tip surface that acts on the edge of the bottomed cylindrical portion to maintain constant caulking force; A caulking device comprising: a second caulking member that strokes the inside of the first caulking member in the same direction independently of the first caulking member by a hydraulic cylinder and acts on the tip of the edge to maintain a constant caulking height.