JPH0581387B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for mechanically polishing the inner circumferential surface of a cast iron bent pipe (elbow joint) used in public water works, etc. The present invention relates to a polishing device.

[Conventional technology]

Conventionally, there is no dedicated polishing device for polishing the inner peripheral surface of curved pipes, and polishing is done manually using an electric polisher (commonly known as a hand polishing tool). Polishing using this hand polishing tool has the disadvantage that it is extremely troublesome and time-consuming because the work involves inserting one's hand into a curved pipe, and is therefore inefficient.

Furthermore, polishing work on the inner circumferential surface of a curved pipe generates dust particles during the work, resulting in a poor work environment, and the current situation is that workers avoid polishing the work.

[Problem to be solved by the invention]

The present invention solves this problem, and the rotary abrasive member provided at the tip of the rotating main shaft that slides in the front-rear direction is brought into pressure contact with the inner circumferential surface of the curved pipe at a constant pressure. It is a technical problem to provide an apparatus for polishing the inner circumferential surface of a curved pipe, which has excellent workability and can mechanically polish the inner surface by turning the tube along the inner circumferential surface of the tube.

[Means to solve the problem]

The gist of the present invention will be explained with reference to the accompanying drawings.

A sliding table 2 configured to be slidable in the front-rear direction is provided, a receiver 3 is erected on the sliding table 2, and the receiver 3
The mounting body 2 rotates horizontally with respect to the receiver 3.
4, and the bearing sleeve 10 is pivotally attached to the mounting body 24 so that the bearing sleeve 10 can be slid in the vertical direction. Set it to the rear of the bisecting position,
The rotating main shaft 4 is inserted into the bearing sleeve 10, the rotary polishing member 6 is provided at the tip of the rotating main shaft 4, and the tip of the connecting body 29 fixed to the bearing sleeve 10 is protruded to the rear of the bearing sleeve 10, while the bearing A bearing tube 1 is installed on the rear end side of the tube 10.
A rotating body 17 is provided opposite to the rotating body 17, and a movable body 18 that moves in a radial direction from the center of the rotating body 17 by an appropriate means 19 is provided on the front surface of the rotating body 17, and the movable body 18 and the connection The present invention relates to an apparatus for polishing the inner circumferential surface of a curved pipe, characterized in that it is provided with a drive unit connected to the body 29 via a universal joint 30 and for rotating the rotating main shaft 4 and the rotating body 17.

[Effect]

Since the rotary body 17 rotates and the movable body 18 moves in the radial direction from the center of the rotary body 17 by the operation of the appropriate means 19, the rotary abrasive member 6 is placed in front of the rotary abrasive member 6 with a jig or the like. It rotates while being appropriately pressed against the inner peripheral surface 5a of the curved pipe 5 disposed in a fixed state (draws a circular locus along the inner peripheral surface 5a of the curved pipe 5),
The inner circumferential surface 5a is polished once by the rotating polishing member 6. When the rotary polishing member 6 is moved back and forth by sliding the sliding table 2 back and forth, the entire surface of the inner circumferential surface 5a of the curved tube 5, excluding the curved portion 5b, is polished efficiently (the curved portion 5b
is polished using a hand polishing tool. ).

Furthermore, since the pivot point between the mounting body 24 and the bearing sleeve 10 is set to the rear of the bisecting position of the bearing sleeve 10, the circular trajectory of the rotary abrasive member 6 can be maintained even if the degree of eccentricity of the movable body 18 is small. becomes larger, and the adjustment of the pressure contact force of the curved tube 5 and the adaptation to curved tubes 5 of various sizes become better.

〔Example〕

The drawings illustrate one embodiment of the invention, which will be described below.

The mechanism for sliding the slide table 2 is a table drive mechanism a. The table drive mechanism a uses a motor 7 as a driving force, rotates a threaded rod 8, and slides the slide table 2 in the front-rear direction. The movement of the slide table 2 is designed to match the size of the bent pipe 5, and when the slide table 2 slides to a predetermined position, it automatically stops and returns to the original position again.

9 is a bearing portion.

The rotating main shaft 4 is provided with a bearing sleeve 10 on the outside, and a rotary abrasive member 6 is detachably provided on the rotating main shaft 4 protruding from the tip of the bearing sleeve 10.

Although this rotary polishing member 6 is shown as a grinding wheel, it may also be a buffing wheel.

At the upper end of the receiver 3, a shaped mounting body 24 is attached to the shaft 11.
This mounting body 2 is provided so as to be rotatable in the horizontal direction.
The rear end portion of the bearing sleeve 10 is housed between the left and right walls 22 of 4, and the bearing sleeve 10 is attached to the mounting body 24 by the shaft 25.
The bearing sleeve 10 is pivotably mounted on the bearing sleeve 10 so as to be freely slidable in the vertical direction.

The mechanism for rotating the rotating main shaft 4 is the main shaft drive mechanism b.
It is. The main shaft drive mechanism b uses a motor 26 for driving force, and this motor 26 is fixed to the rear end of the bearing sleeve 10, and the pulley 12 of this motor 26 and the pulley 27 provided at the rear end of the rotating main shaft 4 are connected to each other. The main shaft 4 is rotated by suspending the belt 13.

The mechanism for rotating the rotary polishing member 6 is a main shaft rotating mechanism c. The main shaft turning mechanism c is provided on the sliding table 2 behind the rotating main shaft 4, uses a motor 28 for driving force, a reduction gear 15 is engaged with the gear 14 of this motor 28, and the reduction shaft 16 rotates. A moving body 17 is provided, and an air cylinder 19 with an air adjustment valve is provided in front of the rotating body 17.
A movable body 18 is provided at the tip of the rod 19' of 9, and the movable body 18 is provided so as to be movable in the radial direction from the center of the rotary body 17. The shaft portion 29' is connected via a rotary joint 30, and has a structure in which eccentric movement is applied to the rotating main shaft 4 by rotating the rotating body 17, and the rotating main shaft 4 is rotated.

In the figure, 20 is a support rod, 21 is a bearing, 23 is a stopper, 31 is a mounting shaft, and 1 is a machine base.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to mechanically polish the inner circumferential surface 5a of the curved pipe 5, and the work efficiency is extremely high compared to the manual polishing method using a conventional hand polishing tool. At the same time, the pressing force of the rotary abrasive member 6 is uniformly applied to the inner circumferential surface 5a of the curved tube 5, so even if the inner circumferential surface 5a of the curved tube 5 is not a perfect circle and is slightly deformed or has irregularities, it can be applied uniformly. Can be polished.

In addition, since the rotary abrasive member 6 is always pressed against the inner circumferential surface 5a of the curved pipe 5 at a constant pressure, the curved pipe 5 is
No unreasonable load is applied to the pipe, and the bent pipe 5 does not come off the jig. Furthermore, it has excellent features such as a good working environment since there is no need to worry about dust particles during work.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a front view of the device, Fig. 2 is a front view of the main parts, and Fig. 3 is a front view of the main part.
The figure is a side sectional view showing the polished state of the curved pipe, and FIG. 4 is a sectional view of the main part. 2...Sliding table, 3...Receiver, 4...Rotating main shaft,
6... Rotating polishing member, 10... Bearing tube, 17...
Rotating body, 18... Moving body, 19... Appropriate means,
24... Mounting body, 29... Connecting body, 30... Universal joint.

Claims (1)

[Claims] 1. A sliding table 2 configured to be slidable in the front-rear direction is provided, a receiver 3 is set upright on the sliding table 2, and the receiver 3 is rotated horizontally with respect to the receiver 3. A mounting body 24 is provided, and the bearing sleeve 10 is pivotally mounted to the mounting body 24 so that the bearing sleeve 10 can be slid in the vertical direction. 10, the rotating main shaft 4 is inserted into the bearing sleeve 10, and the rotary abrasive member 6 is provided at the tip of the rotating main shaft 4.
The leading end of the connecting body 29 fixed at 0 protrudes to the rear of the bushing 10, and a rotating body 17 is provided on the rear end side of the bushing 10 to face the bushing 10, and the front surface of the rotating body 17 is A movable body 18 that moves in a radial direction from the center of the rotating body 17 by an appropriate means 19.
An inner periphery of a curved pipe, characterized in that a drive unit is provided, which connects the moving body 18 and the connecting body 29 via a universal joint 30, and rotates the rotating main shaft 4 and the rotating body 17. Surface polishing equipment.