JPS59224248A - Method of polishing internal surface of pipe - Google Patents

Abstract

PURPOSE:To efficiently polish the inner surfaces of a plurality of pipes, by providing such an arrangement that a plurality of rod members attached, in the intermediate sections thereof, with polishing tools, are laid in parallel with each other, and the pipes inserted respectively onto the rod members are carried by a reciprocating carrier bed to be reciprocated. CONSTITUTION:Pipes (a) to be polished, to which polishing tools 7 having a diameter corresponding to the inner diameter of the pipe (a) are respectively attached from end hook 4 side of rod member 3 being fitted into holders 21 at both ends, are inserted onto rod members 3. Further both end holders 21 are fitted into pipe lock recesses 17 in front and rear support frames 15, 16 on a carrier bed frame 14, and as well the front end hooks 4 which project from opening ends of the pipes (a), are latched to hooks 5 on a rear frame 2. In this condition, by driving a motor to reciprocate the carrier bed frame 14 under the control of limit switches 24, 25, the inner surfaces of the pipes (a) are polished by the polishing tools 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of simultaneously and automatically polishing the inner peripheral surfaces of a plurality of tubes over their entire length.

Conventionally, as a method for polishing the inner surface of metal pipes such as steel pipes, there is a method of inserting a G-pole polishing device into the pipe, and even if such a method can polish large diameter pipes, it cannot polish fine pipes. Diameter pipe cannot be polished. For this reason, a method of polishing the inner surface of the tube by inserting a rod-shaped object with an abrasive tool with an appropriate diameter at the tip through the opening at one end of the tube has been practiced, but the abrasive tool is attached to the free end of the rod-like object. Because of this, when pushing the rod-like object into the tube, the polishing tool slides with a biased contact pressure toward a portion of the inner circumferential surface of the tube, making it impossible to perform uniform polishing.

Also, a method has been developed in which the polishing tool is connected to both ends of the polishing tool and circulated endlessly through the tube, thereby performing polishing by sliding the polishing tool through the tube. , 0-zu are circulated endlessly, so the distance through which the polishing tool passes through the pipe is short compared to the circulating distance, resulting in poor work efficiency and the equipment required to circulate in this manner is complicated. It is difficult to replace them, and it is also difficult to polish the inner surfaces of multiple tubes at the same time.

The present invention has been made in view of these problems, and consists of a plurality of 07 dors with a polishing tool attached to the center, stretched in parallel, and a sander between both ends of these 07 dors. , to provide a tube inner surface polishing method characterized in that a reciprocating table supporting a plurality of tubes inserted into each rad body is reciprocated and the inner circumferential surface of the tubes is polished by the polishing tool. It is.

Embodiments of the present invention will be explained with reference to the drawings: (1) (2)
) is a machine frame that is installed and fixed at a distance of more than twice the length of the steel pipe, etc. to be polished from front to back, and the front machine frame (1) has multiple hollow tubes made of small diameter pipes. Body (3) (3)...
- (3) are inserted and supported at appropriate intervals in the vertical direction, and the rear machine frame (2) has zero rods corresponding to each rod body (3).
A hook (5) that removably hooks a hook (4) attached to the tip of the rad body (3) is rotatably supported by a plurality of rads at regular intervals in the vertical direction. The body (3) can be stretched horizontally between the crosspiece frames (1) and (2) parallel to each other.

At the center of each rod body (3), a polishing sheet piece (
A polishing tool (7) made of an elastic cylindrical body such as rubber coated with
) is detachably attached, and both ends of this polishing tool (7) are sealed against the outer circumferential surface of the 0-rad body (3), and the inner space is placed in the center of the 0-rad body (3). It communicates with a plurality of vent holes (8).

To attach the polishing tool (7) to the zero-rad body (3), insert the polishing tool (7) from the hook-side end of the zero-rad body (3). i:
Insert the ventilation hole (8) in the center of the Orad body (3).
While covering the 0-rad body (3), use a linear object or appropriate metal fittings (9) to tightly attach the Showa 4 to the outer circumferential surface of the Orad body (3).
Alternatively, the zero rad body (3) may be divided into two from the center in advance, and a polishing tool (7) may be inserted between the divided ends.
) may be connected in an airtight manner.

Each hollow 0/νF body (3
) is connected and communicated with a compressed air supply source (not shown) via an on-off valve (10), and supplies compressed air to the o-y door body (3).
It is press-fitted into the polishing tool (7) through the ventilation hole (8) of the polishing tool (7) to give appropriate tension to the polishing tool (7).

(1υ is an air blocking member that closes off a proper place in the 0rad body (3), and is provided on the rear side from the ventilation hole (8).

Each of the hooks (
5) Gears (b) of the same diameter are integrally fixed to the base of the gearbox (b), and these gears (b) are sequentially meshed, and a transmission gear θ3 is reciprocated by a drive source (not shown) such as a t-tar. )
mesh with any gear (b).

θ4) is a movable frame that reciprocates back and forth on a rail (to) laid under the zero-rad body (3), and there is a distance less than the length W of the rod body (3) on the upper surface of its front and rear ends. and support frame part (1
5) (16) are integrally erected, and a pipe hooking recess 07) formed by cutting out diagonally downward from the - side end face of these support frame parts α5) (16) is arranged in parallel. The said tube (→
A plurality of them are provided in the vertical direction at intervals of G.

Both ends of the cable 08) are connected to the front and rear ends of the movable frame 04), and the cable 08) is made into an endless shape. It is designed to circulate back and forth in the length direction. In addition, the moving underframe 04)
It is also possible to install a Tanabata on the top and use the Tanabata to rotate the wheels of the movable frame 04).

- The means for installing and fixing the pipe (a) to the moving frame 04) is carried out by a short pipe-shaped holder 01) having a diameter of λ that can be inserted into the pipe retaining recess αη, as shown in FIG. A stopper (A) is provided around the inner peripheral surface of one end of this Holter ◇ to abut against the end surface of the tube (a), and the outer peripheral surface of the other end is brought into contact with the support frame part 05) or 06). It is made by surrounding the frame with a possible flashing part.

(C) is installed near both ends of the rail (to), or at Mitsui Sochi, detects the end of travel of the movable underframe (14) and reversely rotates the Tanabata. The direction of movement is reversed, the supply of compressed air to the hollow rod body (3) is temporarily stopped, and the rotation gear Qa) of the rod body (3) is electrically rotated by a certain angle. It is composed of

Now, after attaching the polishing tool (7) having a diameter corresponding to the inner diameter of the pipe (a) to be polished to the central part of the zero-rad body (3),
From the end hook (4) side of each rod body (3), insert the tube (a) with the Holter Qυ■υ attached to both ends into the rod body (3), and insert the Holter Qυ■υ at both ends into the rod body (3). Move the underframe (1 → front and rear support frame part 05) (+6) tube" and stop recess 0
At the same time, the tip hook (4) of the rod body (3) protruding from the open end of the tube (a) is engaged with the hook (5) of the rear machine frame (2).

At this time, when installing the pipe (a), the front part should be 0 rad body (3
) is bent downward with the front machine frame (1) as a fulcrum, so the 0rad body (
3) With the free end pulled together, the tube (a) can be easily inserted.

In this way, insert the latter half of each 0" J body (3) into the tube (a), and insert both ends of the container tube (a) into the Holter C2D.
The front and rear support frame parts (+s) (
+6) After supporting and fixing, start the Tanabata and move the moving platform 0xun forward.

When the movable frame 04) begins to move, the polishing tool (7) begins to be inserted into the front end opening of the tube (a), and the rear end! When the contact of the underframe 0-Y with the cut-off switch (c) is removed, compressed air is forced into the polishing tool (7) from the compressed air source through each 0-rad body (3), and the polishing tool (7) is brought into the specified contact position. It is brought into sliding contact with the inner peripheral surface of the tube (a) under pressure, and the inner peripheral surface of the tube (a) is polished as the movable frame 0→ moves forward.

- At the same time as the movable trolley 04) moves forward and the polishing tool (7) is removed from the rear end opening of the tube (a), the front mitsu switch (c) is activated to compress the zero rad body (3). The air supply is temporarily stopped and the transmission gear (13) is rotated by an appropriate angle, and the 0rad body (3
) and rotate each polishing tool (7) by a certain angle.

Furthermore, when the moving frame 0→ stops once due to the operation of the limit switch, and then begins to move backward and leaves the limit switch, the polishing tool (A) is stretched with compressed air in the same way as above. In this state, as the movable frame 04) moves backward, the inner circumferential surface of the tube is polished by the polishing tool (7) from the rear end to the front end of the container tube (a).

When the movable frame α4) comes into contact with the rear limit switch (c), the supply of compressed air is temporarily stopped and the polishing tool (7) rotates in the circumferential direction by a certain angle in the same manner as above, and then the movement is stopped once. The underframe θ4) begins to move forward again and the polishing tool (
7) Polish the inner peripheral surface of the tube.

In this way, the O-sodo body (
8) While the moving underframe Q-yu repeatedly moves back and forth between both ends,
Multiple beams a installed and supported in parallel on this movable frame 0 (1)
) is polished over its entire length with a polishing tool (7).

In the above embodiment, the zero rad body (3) was made hollow and compressed air was supplied to the polishing tool (7) to maintain a constant contact pressure against the inner circumferential surface of the pipe. Instead of using compressed air, the polishing tool (7) may be made of a solid elastic member and brought into sliding contact with the inner circumferential surface of the pipe with a constant contact pressure.

As described above, in the present invention, a plurality of pipes are arranged in parallel to a movable underframe, both ends of which are supported by both end support frame parts of the movable underframe, and a plurality of pipes are installed in the center with a polishing tool attached. The Rad bodies are inserted into the container tubes and stretched, and then the movable frame is reciprocated in the length direction of the Rad body, and the polishing tool attached to the Rad body is moved when the movable frame is moved forward. While one side of the tube is open, slide it inside the tube to the other open end, and when moving back, slide inside the tube from the other open end and polish the inner circumferential surface of the tube while moving relative to one open end. Since this method relates to a method for polishing the inner surface of a tube, it is possible to polish the inner surface of a plurality of tubes at the same time under the same conditions, which further improves efficiency compared to conventional polishing methods. The polishing tool slides on the inside of the tube both when the cart moves forward and backward, eliminating any polishing loss.Furthermore, the skeleton can be moved to the underframe with the tube inserted through the stretched zero-rad body. Since the rad body is reciprocated in the length direction by running, the sliding contact of the polishing tool against the inner circumferential surface of the pipe is stable, and the contact pressure is uniform during both forward and backward movements, resulting in a highly accurate finish. This allows for good polishing.

In addition, by attaching a polishing tool to the 0-rad body that corresponds to the diameter of the pipes, even if all the pipes have different diameters or one or several pipes have different diameters from other pipes, it can be polished at the same time. It can be subjected to polishing treatment.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a simplified side view with a part of the device in section, FIG. 2 is a front view of the support frame, and FIG. 3 is a rear view of the rear machine frame. FIG. 4 is an enlarged sectional view of the polishing tool attachment part, FIG. 5 is an enlarged sectional view of the tube support part, and FIG. 5 is an enlarged sectional view of the tube support part. (1) (2)...Machine frame, (3)...0rad body, (
7)... Polishing tool, 0 clauses... - Moving underframe, (15> (
IQ)...Support frame part, (a)...Tube.

Claims (1)

[Claims] ■ A plurality of tubes are placed parallel to the movable frame, and both ends of the tubes are supported by both end support frames of the movable frame, and a plurality of O-rad bodies with polishing tools attached to the center are attached to the container tubes. After that, the movable frame is moved back and forth in the length direction of the Q+y body, and the polishing tool attached to the zero body is inserted from one open end of the tube when the movable frame moves forward. It is characterized by polishing the inner circumferential surface of the tube by sliding inside the tube and polishing the other open end, and when moving backwards, sliding inside the tube from the other open end and moving relatively to one open end. A method for polishing the inner surface of a tube.