JPH06126551A - Insert press-in device - Google Patents

Abstract

PURPOSE:To facilitate quality gurantee by stabilizing a press fitting distance to a fixed one. CONSTITUTION:An insert press-fitting device is provided with a workpiece support bed 2 for setting the workpiece 1 to the upper part, a press-in shaft 4 vertically driven above the workpiece support bed 2 to press fit an insert part removably held on the lower end into a workpiece 1 when the shaft is moved downward and a position sensor 5 fixed to the press-in shaft 4 to detect a displacement distance between the shaft and the workpiece support bed 2. The position sensor 5 detects the displacement distance between the workpiece support bed 2 and the press-in shaft 4 to detect a moving-down distance of the workpiece support bed 2. A press-fitting distance of the insert part 3 in the workpiece 1 is controlled by controlling the moving-down distance of the workpiece support bed 2 on the basis of the detection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert press-fitting device for press-fitting insert parts such as nuts into a work such as a molded product.

[0002]

2. Description of the Related Art An insert part such as a nut is press-fitted into a press-fitting hole formed in a work such as a molded product so that the insert part is embedded in the work and attached. When press-fitting the insert parts into the work, the insert press-fitting device is equipped with a work support base for setting the work on the upper part and a press-fit shaft arranged above the work support base and vertically driven by a hand press, an air press, or the like. Can be done using. That is, this insert press-fitting device sets the work on the work support and holds the insert part at the lower end of the press-fitting shaft so that it can be detached, and then moves the press-fitting shaft downward to press-fit the insert part into the press-fitting hole of the work. It was done like this.

[0003]

However, when press-fitting an insert part into a work using the insert press-fitting device as described above, the distance of press-fitting the insert part into the work (press-fitting depth) is controlled to be constant. However, there is a problem that the quality cannot be guaranteed because the insert parts fall off if the press-fitting distance is insufficient, or the work cracks if the press-fitting distance is too deep.

The present invention has been made in view of the above points, and an object of the present invention is to provide an insert press-fitting device which can stabilize the press-fitting distance constant and facilitate quality assurance.

[0005]

An insert press-fitting device according to the present invention is a work support base 2 on which a work 1 is set, and a work support base 2 which is vertically moved above the work support base 2 and is detachably attached to a lower end thereof when the work support base 2 is moved downward. It is characterized by comprising a press-fitting shaft 4 for press-fitting the insert part 3 held in the work 1 into the work 1, and a position sensor 5 fixed to the press-fitting shaft 4 for detecting a displacement distance between the work support base 2. It is a thing.

[0006]

When the insert part 3 is pressed into the work 1 on the work support base 2 by moving the press-fitting shaft 4 downward, the work sensor is supported by detecting the displacement distance between the work support base 2 and the position sensor 5. The lower moving distance of the base 2 can be detected, and the press-fit distance of the insert part 3 into the work 1 can be controlled by controlling the lower moving distance of the work support base 2 based on this detection.

[0007]

EXAMPLES The present invention will be described in detail below with reference to examples. The work support base 2 is mounted on the other end of the load cell 9 whose one end is fixed to the fixed base 11 provided on the table 10a of the base 10, and the work supporting base 2 holds the work 1 on the upper surface thereof. A receiving portion 13 is provided.

A press-fitting shaft 4 is arranged directly above the work support base 2. A mounting sleeve 14 is fixed to the outer periphery of the press-fitting shaft 4, and a slider 16 is vertically slidably attached to a guide rail 15 vertically fixed to a column 10b of a base 10 and the mounting sleeve 14 is attached to the slider. 1
It is attached to 6. Therefore, the press-fitting shaft 4 is the guide rail 1
It is movable up and down along 5. Further, the press-fitting shaft 4 is formed in a hollow cylindrical shape, and a suction port 17 is formed in the opening at the lower end thereof, and a suction hose 18 connected to a vacuum pump or the like is connected to the opening at the upper end.

The press-fitting shaft 4 is vertically driven by a cylinder device. For example, by connecting a cylinder rod (not shown) of the cylinder device to the upper end of the press-fitting shaft 4, the press-fitting shaft 4 can be driven up and down. As the cylinder device, it is possible to use a so-called motor cylinder (power cylinder) in which a motor is used as a drive source and its rotational drive force is transmitted as a reciprocating drive force to a cylinder rod to operate. The reciprocating drive speed of the cylinder rod can be controlled by variably controlling the rotation speed of the motor by the electric power converted by the inverter, and the reciprocating drive speed of the press-fitting shaft 4 can be freely changed. .

A fixing member 19 is fixed to a mounting sleeve 14 on the outer periphery of the press-fitting shaft 4 so as to project horizontally to the side, and a position sensor 5 facing vertically downward is fixed to the tip of the fixing member 19. . The position sensor 5 is formed by a photoelectric type distance sensor (displacement sensor) or the like, and when the press-fitting shaft 4 is moved up and down, the position sensor 5 moves up and down along with this and the upper surface of the work support base 2 is a reference. The displacement of the distance from the surface 2a can be detected.

In the insert press-fitting device formed as described above, by supplying the insert part 3 such as a nut having a knurled outer periphery to the suction port 17 at the lower end of the press-fitting shaft 4 while sucking from the suction hose 18. The insert part 3 is held in the suction port 17 by the suction force. Then, after setting the work 1 such as a molded product in the work receiving portion 13 of the work support base 2, the cylinder device is operated to press the press-fitting shaft 4
Can be driven downward, and the insert part 3 held at the lower end of the press-fitting shaft 4 can be press-fitted into the insert hole 20 formed in the work 1 for insertion.

In this way, the press-fitting shaft 4 is moved downward to move the work 1
When press-fitting the insert part 3 into the insert, the position sensor 5 and the reference surface 2 on the upper surface of the work support base 2
The insert is carried out while detecting the displacement of the distance from a with the position sensor 5. The position sensor 5 is connected to a control arithmetic processing unit composed of a sequencer or the like. The position sensor 5 reads the displacement data of the distance between the position sensor 5 and the reference plane 2a on the upper surface of the work support base 2 to press-fit the shaft 4. It is possible to detect the downward movement distance of. Therefore, by controlling the cylinder device with the control arithmetic processing unit based on the detection data from the position sensor 5, the downward movement distance of the press-fitting shaft 4 can be precisely controlled, and the insert part 3 to the work piece 1 can be controlled. The press-fitting distance (press-fitting depth) can be controlled. In this way, the operation of the press-fitting shaft 4 can be automatically controlled based on the data detected by the position sensor 5, and it is possible to automate the insertion work of the insert part 3 into the work 1. In addition, the accuracy of the press-fit distance can be up to about ± 0.01 mm.

Further, when the insert part 3 is press-fitted into the work piece 1 for insertion as described above, the press-fitting pressure for press-fitting the insert part 3 is applied by the press-fitting shaft 4.
The work supporting table 2 receives the pressing force as a load, and the pressing force is received by the load cell 9 as a load and detected. Therefore, the pressure acting on the work support base 2 from the press-fitting shaft 4 is detected by the load cell 9 to detect the press-fitting pressure of the insert part 3 into the work 1, and based on this detection data, the control arithmetic processing unit controls the cylinder device By controlling the output, the insert part 3 can be press-fitted into the work 1 by controlling to a predetermined good press-fitting pressure, and the press-fitting pressure is insufficient, and the press-fitting strength of the insert part 3 into the work 1 is high. Insulation is insufficient, and the pressure of press-fitting becomes excessive so that cracks and the like do not occur in the work 1 and it is possible to make the press-fitting pressure conditions constant and to ensure a high quality of press-fitting. Is.

[0014]

As described above, according to the present invention, the work supporting base for setting the work on the upper part and the insert part which is vertically detachably held above the work supporting base and detachably held at the lower end when the work is moved down are mounted on the work. Since the press-fitting shaft that is press-fitted and the position sensor that is fixed to the press-fitting shaft and that detects the displacement distance between the work-supporting base are equipped, the press-fitting shaft is moved downward to press-insert the insert part into the work on the work-supporting base. At this time, it is possible to detect the downward movement distance of the workpiece support base by detecting the displacement distance between the workpiece support base and the position sensor, and control the downward movement distance of the workpiece support base based on this detection. This makes it possible to control the press-fitting distance of the insert part to the work, which makes the press-fitting distance constant and stable and facilitates quality assurance.

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of the present invention.

[Explanation of symbols]

 1 Work 2 Work support 3 Insert parts 4 Press-fit shaft 5 Position sensor

Claims (1)

[Claims] 1. A work support base for setting a work on an upper part, a press-fitting shaft for press-fitting an insert part detachably held at a lower end to a work when the work support is vertically moved above the work support base, and a press-fitting shaft. An insert press-fitting device, comprising: a position sensor fixed to the work support base to detect a displacement distance between the work support base and the work support base.