JPH08155805A - Beveling machine - Google Patents

Abstract

PURPOSE: To allow a leveling machine to be fixed easily and positively to a pipe by inserting the leveling machine into the end part of the pipe and positioning it, then rotating a clamp screw to move each slider longitudinally, and moving a movable leg up by a crank to fix the leveling machine to the pipe in cooperation with a fixed leg. CONSTITUTION: When a cut joint angle is other than 0 deg., for instance, at the time of executing edge preparation in order to weld a pipe well, a positioning pin 28 is pulled out first, and a spindle 13 is rotated around a rotary shaft 26 by a required angle while confirming the dial 16 of a spindle holder 14 by the index 15 of the spindle 13 so as to fix the guide part 19 of the spindle 13 to the spindle guide face 21 of a spindle holder 14 by plural bolts 27. A leveling machine 1 is then inserted into the end part of the pipe from the rear end frame 9 side, and the clamp screw 10 of a clamp part 2 is rotated to move up a movable leg 5 so as to temporarily fix the edge preparing machine 1 to the pipe in cooperation with a fixed leg 4. Each slider 11 is then moved longitudinally. The movable leg 4 is thereby moved up by a crank 12 to fix the leveling machine 1 to the inner surface of the pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beveling machine for performing a beveling process when joining steel pipes used for underground buried pipes, for example.

[0002]

2. Description of the Related Art When connecting steel pipes used for gas pipes and water and sewer pipes buried in the ground by circumferential welding, in order to form a good welding bead, the pipe end portion to be connected is formed. It is necessary to accurately process the groove. Conventionally, when performing this groove processing at a construction site, an operator performs the groove processing while holding a portable grinder by hand, and then finishes it into a predetermined shape using a file.

[0003]

As described above, when the operator is carrying out the groove processing while holding the portable grinder by hand, it is not easy to process it into a uniform shape and it takes a lot of time. At the same time, the operator required a high degree of skill.
Further, it took a lot of time to finish the product into a predetermined shape by hand using a file after processing with a grinder.

The present invention has been made to solve the above disadvantages, and an object of the present invention is to obtain a groove processing machine capable of performing groove processing accurately in a short time.

[0005]

A groove processing machine according to the present invention has a clamp part and a tool holding part, the clamp part has a fixed leg, a movable leg and a movable leg elevating part, and the fixed leg is The front leg and the rear frame connected by a plurality of columns are attached to the lower parts of the respective frames, and the movable legs are respectively attached to the upper portions of the front frame and the rear frame so as to be vertically movable. The left and right screws are provided on the front and rear of the movable leg as it goes through the center, and the clamp screw is rotatably attached to the front and rear frames, and the left and right screws of the clamp screw. It has two sets of sliders respectively engaged with the screws, and a crank connected between each slider and the movable leg, and the tool holding part is rotatably attached to the center parts of the front end frame and the rear end frame, A tool positioning part is provided on the front part protruding from the front frame. It characterized by having a main shaft.

The tool holding portion has a guide portion having a flat guide surface at the rear end portion and a positioning hole orthogonal to the guide surface, a main shaft having a tool positioning portion at the front portion, and a front end portion. It is rotatably attached to the center of the frame and the rear frame, and has a spindle guide surface that imitates the guide surface of the spindle and a positioning portion that engages with the positioning hole of the spindle at the center in the longitudinal direction. And a spindle holder that rotatably holds the spindle with a rotary shaft that is attached to a front end portion in a direction orthogonal to the longitudinal direction of the spindle.
It is preferable to provide an index provided at the tip of the guide portion of the spindle and a scale plate provided on the spindle guide surface of the spindle holder.

[0007]

According to the present invention, the insert screw is inserted into the pipe end portion of the pipe for processing the groove processing machine and positioned, and then the clamp screw of the clamp portion is rotated to move the two sets of sliders back and forth,
A crank connected between the slider and the movable leg raises the movable leg to press the movable leg against the inner surface of the pipe, and the fixed leg and the movable leg fix the groove processing machine to the inner surface of the pipe. In this state, a desk grinder, which is a machining tool, is attached to the spindle of the tool holder, and the pipe end is machined by the desk grinder while rotating the spindle.

Further, a guide portion having a flat guide surface is provided at the rear end portion of the main spindle rotatably held by a rotary shaft attached to the main spindle holder of the tool holding portion in a direction orthogonal to the longitudinal direction, and the guide portion is provided. The guide surface of the main shaft holder is made to follow the main shaft guide surface of the main shaft holder, and the main shaft is rotated and positioned around the rotary shaft, and the angle between the desk grinder attached to the main shaft and the pipe end surface is set arbitrarily to perform groove processing. Set the cutting angle arbitrarily.

[0009]

1 and 2 show the structure of an embodiment of the present invention. FIG. 1 is a front view and FIG. 2 is a side view. As shown in the figure, the groove processing machine 1 has a clamp part 2 and a tool holding part 3. The clamp part 2 has a fixed leg 4, a movable leg 5, and a movable leg elevating part 6. Two fixed legs 4 are attached to each of the lower side portions of the front frame 8 and the rear frame 9 connected by a plurality of columns 7, and the movable legs 5 are attached to the movable legs 5 and the rear frame 8. Each of them is attached to the upper part of the frame 9 so as to be vertically movable. As shown in the sectional view of FIG. 3 and the perspective view of FIG. 4, the movable leg elevating part 6 has a clamp screw 10, two sets of sliders 11 and a crank 12. The clamp screw 10 is provided with a left-handed screw and a right-handed square screw before and after sandwiching the central portion, and is rotatably attached to the front end frame 8 and the rear end frame 9. The two sets of sliders 11 have screws that engage the left screw and the right screw of the clamp screw 10, and move in opposite directions by rotating the clamp screw 10. The crank 12 is connected between each slider 11 and the movable leg 5, and the movable leg 5 is moved up and down by the movement of each slider 11.

The tool holder 3 includes a spindle 13 and a spindle holder 14.
And an index 15 and a scale plate 16. As shown in the sectional view of FIG. 5, the spindle 13 has a flat guide surface 17 at the rear end.
A guide portion 19 having a plurality of positioning holes 18a and guide pin holes 18b orthogonal to the guide surface 17 is provided, and a tool positioning portion 20 is provided at the front portion protruding from the front end frame 8. The main spindle holder 14 is rotatably attached to the central portions of the front end frame 8 and the rear end frame 9, and has a main spindle guide surface 21 for imitating the guide surface 17 of the main spindle 13 at the central portion in the longitudinal direction, and a main spindle. Is provided with a long groove 22 that engages with the positioning hole 18a, a pin hole 23 that engages with the guide pin hole 18b and determines a reference position, and a positioning portion 25 having a tightening and fixing portion 24, and the front end portion of the spindle 13 is provided. A main shaft 13 is rotatably held by a rotary shaft 26 mounted in a direction orthogonal to the longitudinal direction, and a guide portion 19 of the main shaft 13 is positioned and fixed on a main shaft guide surface 21 by a plurality of bolts 27 and positioning pins 28. An index 15 is attached to the tip of the guide portion 19 of the main shaft 13, and a scale plate 16 indicating an angle scale based on the position of the rotary shaft 26 is attached to the main spindle guide surface 21 of the main spindle holder 14.
Is installed.

The operation when the groove processing is performed on the pipe end using the groove processing machine 1 configured as described above will be described according to the construction process.

First, when the groove is processed, the cutting angle of the groove is set. When the pipe end to be processed is processed so as to be orthogonal to the axial center of the pipe, that is, when the cutting angle is "0 degree", a plurality of positioning pins 28 are attached to the spindle 13 and the spindle holder 14. The guide portion 19 of the spindle 13 is fixed to the spindle guide surface 21 of the spindle holder 14 with the bolt 27 of
Then, the spindle center of the spindle holder 14 and the spindle center of the spindle 13 are aligned with each other. When the cutting angle is other than "0 degree", the positioning pin 27 is removed, and the spindle 13 is rotated while confirming the angular scale of the scale plate 16 attached to the spindle holder 14 by the index 15 attached to the spindle 13. The guide portion 19 of the main spindle 13 is fixed to the main spindle guide surface 21 of the main spindle holder 14 with a plurality of bolts 27 by rotating about 26 as an angle according to the cutting angle.

Next, a pipe 31 to be processed as shown in FIG.
The groove processing machine 1 is inserted from the rear end frame 9 side into the pipe end of the above, the head 10a of the clamp screw 10 of the clamp part 2 is rotated to raise the movable leg 5, and the fixed leg 4 and the movable leg. Tube 3 at 5
The groove processing machine 1 is temporarily fixed to 1. After that, a positioning jig 33 having a pointer 32 that can move in the vertical direction and the front-back direction is inserted into the spindle 13, and the positioning jig 33 is fixed to the tool positioning portion 20 of the spindle 13. Then, the groove processing machine 1 is positioned so that the pointer 32 of the positioning jig 33 comes to a position corresponding to the grinding amount to be processed, and then the clamp screw 10 is rotated to press the movable leg 5 against the inner surface of the pipe 31. The groove processing machine 1 is fixed to the pipe 31 by the fixed leg 4 and the movable leg 5. When fixing the groove processing machine 1 to the pipe 31 as described above, the clamp screw 10 of the clamp portion 2 is rotated to move the two sets of sliders 11 back and forth, so that between the slider 11 and the movable leg 4. Since the movable leg 4 is raised by the connected crank 12 to press the movable leg 4 against the inner surface of the pipe, the groove processing machine 1 can be easily and firmly fixed to the inner surface of the pipe 31.

After the groove processing machine 1 is fixed to the inner surface of the pipe 31, from the tool positioning portion 20 of the spindle 13 to the positioning jig 3
3 is removed, and as shown in FIG.
A commercially available desk grinder 34 is attached to and a handle 35 is attached to the spindle 13. And with the handle 35, the spindle 13
Drive the desk grinder 34 while rotating the
Process the end of 1. When performing this processing, the desk grinder 34 is positioned at a fixed position by the main shaft 13, so that the end portion of the pipe 31 can be uniformly processed at a predetermined angle.

After the groove processing is completed, the handle 35 and the desk grinder 34 are removed from the main shaft 13, the clamp screw 10 of the clamp portion 2 is rotated to process the movable leg 5, and the groove processing machine 1 is taken out from the pipe 31. .

In the above embodiment, the main shaft 13 is rotatable with respect to the main shaft holder 14 so that the cutting angle can be arbitrarily changed. In the case of processing at a predetermined fixed angle, the main shaft 13 may be rotatably attached directly to the front end frame 8 and the rear end frame 9. By omitting the mechanism for changing the cutting angle in this way, the structure of the groove processing machine 1 can be simplified and the weight can be reduced.

[0017]

As described above, according to the present invention, the two sets of sliders are moved back and forth by rotating the clamp screw of the clamp portion after inserting and positioning the pipe into the pipe end portion of the pipe for processing the groove processing machine. After moving, the crank connected between the slider and the movable leg raises the movable leg to press the movable leg against the inner surface of the pipe, and the fixed leg and the movable leg fix the groove processing machine to the inner surface of the pipe. The pre-machining machine can be fixed to the inner surface of the pipe for easy and strong machining, and it is possible to prevent misalignment of the groove-machining machine during machining.

Since the machining tool is mounted on the spindle of the groove machining machine thus firmly fixed and the pipe end is machined by the machining tool while rotating the spindle, the machining tool is positioned at a fixed position with respect to the pipe end. It is possible to process while positioning the tube, and the tube end can be uniformly processed in a short time.

Further, a guide portion having a flat guide surface is provided at the rear end portion of the main spindle rotatably held by a rotary shaft attached to the main spindle holder of the tool holding portion in a direction orthogonal to the longitudinal direction, and the guide portion is provided. By rotating the spindle around the rotation axis and positioning the spindle while following the guide surface of the spindle guide surface of the spindle holder, the angle between the machining tool mounted on the spindle and the pipe end surface can be set arbitrarily. The cutting angle of the groove processing can be set arbitrarily.

[Brief description of drawings]

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

FIG. 2 is a side view of the above embodiment.

FIG. 3 is a cross-sectional view showing a configuration of a clamp portion of the above embodiment.

FIG. 4 is a perspective view showing the clamp portion.

FIG. 5 is a cross-sectional view showing a configuration of a tool holding portion of the above embodiment.

FIG. 6 is a cross-sectional view showing a clamping process of the above embodiment.

FIG. 7 is a cross-sectional view showing a processing step of the above embodiment.

[Explanation of symbols]

 1 Beveling machine 2 Clamping part 3 Tool holding part 4 Fixed leg 5 Movable leg 6 Movable leg lifting part 8 Front end frame 9 Rear end frame 10 Clamp screw 11 Slider 12 Crank 13 Spindle 14 Spindle holder 15 Index 16 Scale Board

Claims (2)

[Claims] 1. A clamp part and a tool holding part are provided, and the clamp part has a fixed leg, a movable leg, and a movable leg elevating part,
The fixed legs are respectively attached to the lower parts of the front and rear frames connected by a plurality of columns, and the movable legs are vertically movable above and below the front and rear frames, respectively. The left and right screws are attached to the front and rear of the movable leg ascending / descending the center part, and the front end frame and the rear end frame are attached.
The tool holding part has a clamp screw rotatably attached to the frame, two sets of sliders that mesh with the left and right screws of the clamp screw, and a crank connected between each slider and the movable leg. A groove processing machine having a main shaft that is rotatably attached to the center of a frame and a rear end frame, and has a tool positioning portion provided on the front portion protruding from the front end frame. 2. The tool holding portion has a guide portion having a flat guide surface at a rear end portion and a positioning hole orthogonal to the guide surface, and a spindle having a tool positioning portion at a front portion. , Rotatably mounted at the center of the front and rear frames, and a spindle guide surface that imitates the guide surface of the spindle at the center in the longitudinal direction, and positioning that engages with the positioning hole of the spindle. Spindle holder, which has a rotary shaft attached to the front end of the spindle in a direction orthogonal to the longitudinal direction of the spindle, rotatably holds the spindle, an index provided at the tip of the guide portion of the spindle, and a spindle guide for the spindle holder. The groove processing machine according to claim 1, further comprising a scale plate provided on the surface.