JP2613746B2 - Straightener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strain remover used for removing a strain generated on a metal plate or the like.

[0002]

2. Description of the Related Art For example, when a pin or the like is caulked or perforated on a metal plate, a load from one side acts on the metal plate placed on a support table. As a result, the metal plate is distorted such that the peripheral portion thereof jumps up.

Conventionally, a strain remover for removing the above-mentioned strain uses a hydraulic cylinder, and by extending this cylinder, a peripheral portion of a metal plate is pushed down to remove the strain.

[0004]

However, the use of a hydraulic cylinder requires a separate hydraulic pressure source, which increases the equipment cost, requires a large installation space, and presses the metal plate. There is a problem that fine adjustment of the stroke is difficult, and accurate distortion removal cannot be performed.

It is an object of the present invention to provide a straightening machine which can reduce distortion by using an electric motor as a drive source, can reduce the size and equipment cost, and can adjust the stroke with high accuracy. is there.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method in which a motor is directly connected to one end of a case.
The output shaft of this motor is fixed, and the feed screw shaft that is rotatably supported in the case and does not move in the axial direction is connected,
A nut member externally screwed onto the feed screw shaft so as to be movable in the axial direction, and a head mounting provided on the other end side in the case so as to be movable in the axial direction while being prevented from rotating by a spline. The shaft is housed in the case in a coaxial arrangement , one end is fixed to the nut member, and the other end is the head.
This adopts a configuration in which the movable member is connected so as to move integrally in the axial direction via a movable member connected to the mounting shaft .

[0007]

When the motor is started, the feed screw shaft connected to the output shaft rotates, and the nut member externally fitted to the screw shaft is connected to the head mounting shaft which is locked against the case. Therefore, the nut member cannot be rotated, so the nut member moves in the axial direction by the feed action of the feed screw shaft, and the head mounting shaft coupled with the nut member protrudes in the axial direction from the other end of the case, and By pressing the metal plate with the attached head, the distortion generated in the plate is removed.

By using a motor as a drive source for moving the head mounting shaft in the axial direction, stroke control can be performed with high precision.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the first example shown in FIGS. 1 (A) and 1 (B), a strain remover 1 connects a short cylindrical upper case 2 and a long cylindrical lower case 3 via a bearing support block 4. Coaxially connected, the motor 5 is fixed to the upper end of the upper case 2, and the feed screw shaft 6 housed in the upper part in the lower case 3.
The upper end extension 7 is rotatably supported by a bearing 8 fixed to the block 4, and a thrust bearing 10 is provided between the lower surface of the block 4 and the large-diameter step 9 provided on the extension 7, and a feed screw shaft 6 is provided. Are arranged so that they can rotate freely and do not move in the axial direction.

The feed screw shaft 6 connects the upper end of the extension 7 to the output shaft 11 of the motor 5 via a joint 12.
A forward / reverse rotation is applied by the motor 5 and a nut member 13 which is externally fitted to the feed screw shaft 6 and is movable in the axial direction is housed in the lower case 3. I have.

The nut member 13 and the feed screw shaft 6 may be formed by a combination of a male screw and a female screw in addition to a combination of a bolt nut and a ball screw shaft.

The lower end of the lower case 3 is formed in a spline hole 14, and the head mounting shaft 15 inserted in the lower end of the lower case 3 has the spline 16 on the outer peripheral surface fitted into the spline hole 14 and cannot rotate. A head 17 for pressing a metal plate is attached to the lower end of a head attachment shaft 15 projecting downward from the lower end surface of the lower case 3.

A movable member 18 having an outer diameter fitted into the lower case 3 and having a space for accommodating the feed screw shaft 6 therein is freely movable in the axial direction below the nut member 13 in the lower case 3. The upper end of the movable member 18 is externally fitted and fixed to the nut member 13, and the lower end of the movable member 18 is connected to the upper end of the head mounting shaft 15 via a knock pin 19.

The nut member 13 is fixed to the head mounting shaft 15 via the movable member 18. Since the head mounting shaft 15 is prevented from rotating by a spline structure, the nut member 13 is also prevented from rotating. As a result, the rotation of the feed screw shaft 6 causes an axial feed action on the nut member 13, and the nut member 13 and the head mounting shaft 15 move integrally.

The components described above are arranged coaxially, and have a vertically long circular axis shape as a whole.

Next, a second example shown in FIGS. 2A and 2B will be described. Note that the same parts as those in the first example are denoted by the same reference numerals, and description thereof will be omitted.

In the second example, the upper and lower limits of the vertical stroke of the head mounting shaft 15 are set by sensors, and the upper limit sensor 21 is located at the upper position on the outer surface of the lower case 3.
And a lower limit sensor 22 is attached to the lower position.

The two sensors 21 and 22 are, for example, movable member 1
The upper end of the motor 8 and the upper end of the concave portion 23 provided on the outer periphery of the movable member 18 are detected by a proximity switch, and the detection signal is used to control the stop and forward / reverse rotation of the motor 5.

FIG. 3 shows an example in which the straightening machine 31 of the present invention is used in combination with a caulking machine 31 for a shaft member B with respect to a metal plate A, and the caulking machine 31 is used. A support 33 for the shaft member B is provided on the table 32, and a caulking machine main body 34 is disposed above the support 33, and a forming shaft 35 that performs vertical and rotational movements is mounted on the support 33.
Of the blade A is inserted into the small diameter portion of the shaft member B erected on the support base 33, and the forming shaft 35 is lowered while rotating the forming shaft 35 in this state. To fix the shaft member B to the metal plate A by caulking.

The straightening machine 1 is mounted on both sides of the caulking machine main body 34 by brackets 36 so that the axes thereof are perpendicular to each other. The raised head 17 is positioned above the metal plate A.

When the shaft B is caulked at the time of caulking the shaft B by the caulking machine main body 34, a load is applied to the metal plate A in the direction of the pushing force. As shown by the dashed line, the peripheral portion is distorted as if it jumps up.

Then, the motor 5 of the strain removing machine 1 located above the portion where the jump has occurred is rotated forward.

The forward rotation of the feed screw shaft 6 connected to the output shaft 11 of the motor 5 causes the nut member 13 to move downward, and the head mounting shaft 15 connected to the nut member 13 to move downward from the lower end of the lower case 3, and the lower end thereof. The head 17 attached to the metal plate A
Touch the part that jumped up and push it down.

The pressing of the metal plate A by the head 17 is performed by taking into account the amount of distortion and the amount of elastic recovery, and this pressing amount can be controlled by the electric control of the motor 5. The head 17 is returned to the raised position by the reverse rotation of the nut member 13.

As described above, since the head 17 is moved up and down by the motor 5, the control of the up-and-down stroke can be performed easily and accurately, and the up-and-down movement can be performed by an electrical control. Becomes possible.

Although the straightening machine 1 is shown in combination with a caulking machine in the case of the drawing, it may be used solely exclusively for straightening.

[0028]

As described above, according to the present invention, the rotation of the motor is converted into linear motion by the feed screw shaft and the nut member, and the head mounting shaft is moved forward and backward in the axial direction. Strain relief can be performed as a source, and the control of the forward / backward stroke of the head mounting shaft is accurate, enabling highly accurate strain relief work. In addition, since only electrical control is required, the structure is simplified and the overall size is small. Can be achieved.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional front view showing a first example of a straightening machine, and FIG. 1B is a longitudinal sectional front view showing a state where a head mounting shaft is lowered.

FIG. 2 (A) is a vertical sectional front view showing a second example of the straightening machine, and FIG. 2 (B) is a vertical sectional front view showing a state where the head mounting shaft is lowered.

FIG. 3 is a longitudinal sectional front view showing a use state of the straightening machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Straightening machine 2 Upper case 3 Lower case 5 Motor 6 Feed screw shaft 11 Output shaft 12 Joint 13 Nut member 15 Head mounting shaft 16 Spline 17 Head 18 Movable member

Claims (1)

(57) [Claims] 1. A motor is directly fixed to one end of a case ,
The output shaft of the motor, and connect the feed screw shaft which is supported so as not to move to the rotatable axially within the case, the external fitting screwed nut member so that movement is possible in the axial direction to the feed screw shaft And a head mounting shaft provided so as to be movable in the axial direction in the other end side of the case so as to be prevented from rotating by a spline, is housed in a coaxial arrangement in the case ,
One end is fixed to the nut member, and the other end is
A strain remover that is connected to move integrally in the axial direction via a connected movable member.