JPH0739075B2 - Wrapping machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lapping machine used for finishing gas valves, hydraulic switching valves and other valves, cocks and the like.

[Conventional technology]

For example, in the case of a gas valve, a cone-shaped rotary plug is fitted into a main body having a tapered seat in an airtight state, but conventionally there has been no device for automatically performing the tight fitting work of the rotary plug.

[Problems to be Solved by the Invention]

Conventionally, since there was no device for automatically performing the work of tightly fitting the rotary plug into the valve body, the work efficiency was poor.

Therefore, an object of the present invention is to provide a lapping machine that can automatically perform the above work.

[Means for Solving the Problems]

According to the present invention, an oscillating actuator for oscillating and rotating a jig for holding a cone-shaped insert and an oscillating cylinder for vertically moving the jig are provided on an upper portion of a frame, and a table is mounted on an apron on a lower portion of the frame. Equipped with a table levitation cylinder to further levitate, on the table,
The pedestal on which the workpiece into which the cone-shaped insert is inserted is placed in a movable state can be fixed, and is lowered along with the lowering of the jig on the upper part of the pillar standing on the apron. The above problem is solved by a lapping machine provided with a clamp plate provided with a clamp member for clamping the workpiece.

[Action]

The pedestal is fixed on the table, and the work piece is placed on the pedestal. Meanwhile, attach the cone-shaped insert to the jig and turn on the switch. Then, first, the direct-acting cylinder that raises and lowers the jig and the table levitation cylinder are activated, and the workpiece rises and the cone-shaped insert descends, so that the cone-shaped insert enters the tapered hole of the workpiece. enter in. At that time, if the work piece in the movable state is displaced on the pedestal, the work piece is displaced in the normal position direction as the cone-shaped insert enters, so that centering is performed. . After that, the jig is further lowered to press down the clamp plate, and the lower part of the clamp member is exposed to the inside of the workpiece to clamp the workpiece. In that state, the lapping agent is supplied into the workpiece, and lapping is performed until the operation of the oscillating actuator is started. In the meantime, by performing an operation that distorts the balance between the pressing force of the linear motion cylinder and the pressing force of the table floating cylinder, favorable lapping is performed, so that the cone-shaped insert is securely fitted tightly in the work piece. It

〔Example〕

A preferred embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a frame, which is symmetrical and has two swing type actuators 2 and two linear motion cylinders 3 accommodated in the upper part thereof. The direct acting cylinder 3 is fixed to a front plate 4 standing upright in the frame 1, and the swing actuator 2 is attached to a bracket 5 fixed to a rod of the direct acting cylinder 3. Therefore, as the direct-acting cylinder 3 operates, the oscillating actuator 2 and each of the parts to be described later attached to its output shaft move up and down. A universal joint 6 is attached to the tip of the output shaft of the swing actuator 2 via a coupling 7. Reference numeral 8 denotes a jig provided on the universal joint 6 for holding the cone-shaped rotary plug 26. Reference numeral 9 is an apron, and 10 is a table, which is accommodated in a circular hole 9a provided in the apron 9 and floats from that position. On the top of the table 10,
An inverted T-shaped pedestal fixing groove 11 is formed radially. 12
Is a pedestal of the valve body 25, and as shown in FIG. 4 and FIG. 5, a receiving plate 14 provided with a V-shaped receiving groove 14a is provided on both sides of the base 13 so as to face the base 13. The four corners are fixed by T-slot bolts 11a inserted into the pedestal fixing groove 11. Four columns 15 stand on the apron 9 so as to surround the table 10. Each column 15 is provided with a spring 15a which acts to push up the clamp plate 16. A clamp member 17 is installed in the center of the back side of the clamp plate 16. The lower portion of the clamp member 17 has a small diameter so that it can be fitted into the upper insertion opening of the valve body 25. A circular hole 18 is formed from the clamp plate 16 to the clamp member 17 and has a diameter smaller than that of the jig 8 and which allows the rotary plug to come in and out. Reference numeral 19 denotes a table levitation cylinder, the rod of which is connected to the mandrel 21 of the table 10 via a universal joint 20.

In the above structure, first, the pedestal 12 that fits the valve body 25
Is fixed on the table 10 with the T-slot bolt 11a, and the pedestal 1
The valve body 25 is placed in the second receiving groove 14a. Then, the rotary plug 26 is attached to the jig 8 and then started. Then, the table floating cylinder 19 moves up to lift the table 10, the valve body 25 moves up, and the linear cylinder 3 moves down to lower the rotary plug 26. Swivel stopper
26 enters the valve body 25 through the circular hole 18 of the clamp plate 16. At that time, if the valve body 25 is deviated, the peripheral edge of the bottom surface of the rotary plug 26 comes into contact with the tapered surface of the insertion port of the valve body 25, and the valve body 25 is moved in the normal position in accordance with the entry. The valve body 25
Is centered. When the rotary plug 26 enters the valve body 25 to some extent, the jig 8 having a diameter larger than that of the circular hole 18 is formed.
Then, the clamp plate 16 is pushed down. with this,
By fitting the lower small diameter portion of the clamp member 17 into the valve body 25, the valve body 25 is held in the normal position. At this point, the wrapping agent is supplied and the oscillating actuator 2 is actuated to oscillate and rotate the rotary plug 26 in the valve body 25 so that lapping is performed, and the rotary plug 26 gradually becomes familiar with the valve body 25. Then, they are closely fitted.
During that time, the lap pressure is adjusted by hydraulically operating so as to upset the pressure balance between the pushing force of the rotary plug 26 by the linear cylinder 3 and the pushing force of the valve body 25 by the table floating cylinder 19. Thus, the wrapping in a good condition is efficiently performed.

〔The invention's effect〕

The present invention is as described above, and has an effect that the work of closely fitting the cone-shaped insert into the workpiece having the tapered hole can be automatically and accurately performed.

[Brief description of drawings]

1 is a front view of an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a cross-sectional view thereof, FIG. 4 is a front view of a clamp plate and a pedestal portion, and FIG. 5 is a pedestal. FIG. Explanation of symbols 1 …… Frame 2 …… Oscillating actuator 3 …… Direct-acting cylinder, 8 …… Jig 9 …… Apron, 10 …… Table 12 …… Bed, 15 …… Stand 16 …… Clamp plate , 17 …… Clamping member 19 …… Table floating cylinder

Claims (1)

[Claims] 1. An oscillating actuator for oscillating and rotating a jig for holding a cone-shaped insert on an upper portion of a frame, and
With a linear cylinder that raises and lowers the jig,
A table levitation cylinder that floats the table above the apron is provided in the lower portion of the frame, and a pedestal for movably mounting a workpiece into which the cone-shaped insert is inserted can be fixed on the table. A lapping machine, which is provided with a clamp plate having a clamp member that is lowered as the jig is lowered and clamps the workpiece, on the upper part of a pillar standing on the apron.