JPS639361Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] This invention relates to a tube end processing machine.

[Conventional technology]

When connecting steel pipes by welding, the ends of the pipes are cut into a tapered shape or a J-shape. A tube end processing machine is usually used to perform this cutting process. Figure 1 shows an example of this tube end processing machine. Reference numeral 1 denotes a base, which is fixed to the tube to be processed X by a clamp 2. A rotating body 3 is rotatably attached to this base 1. The rotating body 3 has a ring shape that surrounds the tube X from the outside, and a gear 4 is formed on the outside. A speed reducer 5 and a motor 6 are mounted on the base 1, and are configured to engage with the gear 4 to rotate the rotating body 3. A tool rest and a cutting tool are attached to this rotating body 3 to perform tube end processing. Figure 2 shows an enlarged view of the tool post and cutting tool. The tool rest 7 is provided with a ratchet gear 8 and a shaft 9 having a threaded part fixed to the ratchet gear 8, and the cutting tool 10 is mounted on a sliding base 11 having a female threaded part that fits into the shaft 9.
It is configured to move up and down in the vertical direction by rotation of the ratchet gear 8. The ratchet gear 8 is
It rotates by being caught on a half-moon-shaped protrusion 12 attached to the base 1. Therefore, each time the rotating body 3 rotates once, the ratchet gear 8 is rotated by the protrusion 12, which causes the slide table 11 and the cutting tool 10 to move downward, and the cutting tool is fed and the cutting progresses. ing.

[Problem that the invention attempts to solve]

However, in the case of a tube end processing machine with the above configuration,
Because the cutting tool is not configured to follow the pipe surface, it cannot respond to changes in the flatness of the pipe to be processed or changes in pipe wall thickness, and it is difficult to keep the root face constant, which is one of the most important factors in Uranami welding. cannot be processed. Further, since there is no route face setting mechanism, that is, a tool feed stop mechanism, there are drawbacks such as difficulty in obtaining a desired route face.

[Means for solving problems]

The present invention was made to improve the above-mentioned conventional drawbacks, and its basic features are a base fixed to the pipe to be processed, and a base attached to the base that covers the area around the pipe to be processed. In a pipe end processing machine that has a rotating body that rotates, and a tool rest that is attached to the rotating body and sends a cutting tool each time it rotates, the tool rest is attached to the rotating body, and the support body has a diameter of the pipe to be machined. A supporting member is attached to be able to slide in a direction, a copying roller is attached to the tip of the supporting member so as to be able to contact the inner surface of the pipe to be processed, and a copying roller is interposed between the support body and the supporting member, and the supporting member is attached to the pipe to be processed. It has a spring that presses the copying roller against the inner surface of the pipe by applying force outward in the radial direction, a threaded portion on one end, and a spline on the outer periphery of the other end so that the axis line is along the radial direction of the pipe to be machined. a shaft body rotatably attached to the support member; a slide table having a female threaded portion into which the threaded portion of the shaft body is screwed, and provided on the support body so as to be slidable in the radial direction of the pipe to be processed; It has a cutting tool for pipe end processing that is attached to the moving table, and a spline that removably engages with the spline of the shaft on the inner peripheral surface, and is fitted to the other end of the shaft so that it can slide in the axial direction. a cylindrical ratchet gear, one end of which is locked to the shaft body, and a spring that urges the ratchet gear outward in the radial direction of the workpiece pipe along the axial direction of the shaft body; and a spring fixed to the slide table;
In order to press the ratchet gear inward in the radial direction of the workpiece pipe along the axial direction of the shaft body by sliding the slide table inward in the workpiece pipe radial direction, the end of the ratchet gear is on the side in the direction in which the ratchet gear is biased by the spring. a locking member that comes into contact with the surface, and a locking member that engages with the ratchet gear for each rotation of the rotating body;
Its basic feature is that it has a protrusion that rotates it.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 3 is a front view of the tool rest of the tube end processing machine according to the present invention, and FIG. 4 is a side sectional view, and the state in which this tool rest is mounted on the rotating body 3 is as shown in FIG. The rest of the structure except for the tool post 20 is the same as the conventional one, so a description thereof will be omitted.

The above-mentioned tool rest 20 has the following configuration.

First, reference numeral 21 denotes a support which is the main body of the tool post, and the support 21 is attached to the rotating body 3.

A support member 31 is attached to the support body 21 so as to be slidable in the radial direction of the pipe to be processed. This support member 31 has a horizontal support plate 24 at the top of its main body. This horizontal support plate 24 is fixed to the support member main body with bolts 34.

Reference numeral 22 denotes a copying roller, and the copying roller 22 is rotatably attached to the tip of a support member 31 via a roller shaft 30. The copying roller 22 supported in this manner is positioned inside the tube end of the tube to be processed X during machining, and comes into contact with the inner surface of the tube.

Reference numeral 23 denotes a spring, which is interposed between the horizontal support plate 24 and the support body 21 constituting the support member, and its elastic force causes the support member 31 to move outward in the radial direction of the pipe to be machined (in FIG. 4). , upward), it acts to press the copying roller 22 against the inner surface of the tube. Note that as this spring, in addition to a coil spring, an air spring or the like can be used.

27 is a shaft body, and the shaft body 27 has a threaded portion 2 on one end side.
72, and is rotatably attached to the horizontal support plate 24 via a bearing 35 so that its axis extends in the radial direction of the pipe to be processed. This shaft body 27 has a cylinder body 271 fitted and fixed to the shaft body on the other end side, and a spline 271 is formed on the outer circumference of this cylinder body 271.
70a is formed.

28 is a ratchet gear, and the ratchet gear 2
8 is configured in a cylindrical shape, and has a spline 270a on the shaft body side and a spline 270b to be removably engaged with the spline 270a on the inner circumferential surface thereof, and the cylindrical body 271 forming a part of the shaft body has an axial direction. They are slidably fitted. A spring 32 is provided inside the ratchet gear 28, and each end of the spring 32 engages with the inner end of the ratchet gear and the end of the cylindrical body 271.

In such a structure, the ratchet gear 28 is urged outward in the radial direction of the pipe to be processed by the spring 32, and is engaged with the cylinder body 271, that is, the shaft body 27, via splines 270a and 270b. If an external force is applied in the direction of compressing the spring 32, the ratchet gear 28 will slide inward in the radial direction of the pipe to be machined, and the spline 270b will come off the spline 270a of the cylinder 271, and even if the ratchet gear 28 rotates, the shaft will 27 will no longer rotate. That is, the splines 270a and 270b constitute a clutch mechanism between the ratchet gear 28 and the shaft body 27.

Reference numeral 26 denotes a sliding base, and the sliding base 26 is slidably fitted to the support body 21, and the female threaded portion 2
The threaded portion 272 of the shaft body 27 is screwed into 60,
It is configured to slide in the radial direction of the pipe to be processed by rotation of the shaft body 27. From this sliding table 26, the third
As shown in the figure, L-shaped locking pieces 2 are attached from both sides.
61 and 261 extend above the ratchet gear 28. The locking pieces 261, 261 have screws 262, 262 at their tips, and these screws are attached to the end face of the ratchet gear 28, that is, the ratchet gear surface 2 on the side in which the ratchet gear is biased by the spring 32.
81. That is, as the sliding table 26 slides inward in the radial direction of the workpiece pipe due to the rotation of the ratchet gear 28, the locking piece 2
61 screws 262 sequentially push down the ratchet gear 28 in the same direction, and the splines 270a, 270b
It is configured to remove the

25 is a cutting tool, and the tooling tool 25 is the sliding table 2.
6 so that its protrusion amount can be adjusted. This slide table 26 is designed so that a tool support (not shown) can be attached together with the tool tool 25.

Note that 29 is a copying roller push-down tool attached to the support body 21, and is used when attaching and detaching the pipe end processing machine to and from the pipe to be processed. That is, the bolt 33 is tightened to push down the horizontal support plate 24, the spring 23 is compressed, and the copying roller 22 is inserted into the pipe with some clearance, and during cutting, the bolt 33 is loosened to bring the copying roller 22 into contact with the inner surface of the pipe. It is something. Further, 36 is a ratchet gear stopper.

The tool rest 20 configured as described above is attached to the rotating body 3 via the support body 21, as shown in FIG.

Next, the operation will be explained.

Driven by the motor 6, the rotating body 3 rotates around the tube to be processed X, and together with this, the tool post 20 also rotates, and the cutting tool 25 cuts the end of the tube. On this occasion,
Since the copying roller 22 copies the inner surface of the tube, the cutting tool 25 rotates while drawing a trajectory along the inner surface of the tube even if the tube to be processed is deformed or the wall thickness changes. When the tool rest 20 comes to the position of the protrusion 12, the ratchet gear 28 is hooked thereto and rotates, the shaft body 27 rotates, and the slide rest 26 moves inward in the radial direction of the workpiece pipe (as shown in FIG. 4).
(downward), and the bite is fed. When the slide table 26 moves with each rotation, the locking piece 2
61 moves in the same direction and comes into contact with the ratchet gear 28, pressing it inward in the radial direction of the pipe to be processed. Then, as the tool rest 20 rotates, the tool feed advances, and the locking piece 261 pushes the ratchet gear 28 inward in the radial direction of the workpiece pipe, and eventually the splines 270a and 270b disengage, leaving the ratchet gear 28 in a free state. become. This stops byte feeding. Therefore screw 26
2 can be adjusted appropriately, this feeding can be stopped when the cutting edge of the cutting tool 25 has been fed to a predetermined position, that is, a position where the desired root face is secured. The position of the tip of the cutting tool at which feeding is stopped is determined by the copying roller 22 with the inner surface of the tube as a reference, so it is not affected by flattening deformation or changes in wall thickness of the tube to be processed. is obtained.

[Effect of the invention]

As explained above, according to the present invention, cutting is performed following the inner surface of the tube, and the tool feed can be stopped at a desired position based on the inner surface of the tube, so that it is not affected by deformation of the tube or changes in wall thickness. Therefore, the desired root face can be obtained with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a tube end processing machine according to the present invention. Fig. 2 is a side sectional view showing the turret of a conventional tube end processing machine, Fig. 3 is a front view showing the turret of an embodiment of the pipe end processing machine according to the present invention, and Fig. 4
The figure is a side sectional view thereof. In the figure, 3 is a rotary table, 20 is a tool post, and 21
is a support, 22 is a copying roller, 23 is a spring, 24
is a horizontal support plate, 25 is a cutting tool, 26 is a sliding table, 2
7 is a shaft body, 28 is a ratchet gear, 31 is a support member, 32 is a spring, 260 is a female threaded portion, 261 is a locking piece, 270a, 270b are splines, 272
indicates each threaded part.

Claims (1)

[Scope of utility model registration request] A pipe end processing machine that has a base fixed to a pipe to be processed, a rotating body attached to the base and rotating around the pipe to be processed, and a tool rest attached to the rotating body and sending a cutting tool each time it rotates. , a support member on which the tool rest is attached to the rotating body, a support member attached to the support member so as to be slidable in the radial direction of the workpiece pipe, and a support member attached to the tip of the support member so as to be able to contact the inner surface of the workpiece pipe. a spring that is interposed between the support body and the support member and presses the copy roller against the inner surface of the pipe by urging the support member outward in the radial direction of the pipe to be processed; and a threaded portion on one end side. The shaft body has a spline on the outer periphery of the other end and is rotatably attached to the support member so that the axis line is along the diameter direction of the pipe to be processed, and a female threaded portion into which the threaded portion of the shaft body is screwed. and a sliding stand provided on the support body so as to be slidable in the radial direction of the pipe to be processed, a cutting tool for pipe end machining attached to the sliding stand, and a spline of the shaft body on the inner circumferential surface thereof, which can be engaged with and detached from the spline of the shaft body. A cylindrical ratchet gear that has an engaging spline and is fitted to the other end of the shaft so as to be slidable in the axial direction, and one end is locked to the shaft and the ratchet gear is machined along the axial direction of the shaft. A spring biases outward in the pipe radial direction and is fixed to a sliding base.
In order to press the ratchet gear inward in the radial direction of the workpiece pipe along the axial direction of the shaft body by sliding the slide table inward in the workpiece pipe radial direction, the end of the ratchet gear is on the side in the direction in which the ratchet gear is biased by the spring. a locking member that comes into contact with the surface, and a locking member that engages with the ratchet gear for each rotation of the rotating body;
A tube end processing machine characterized by being provided with a protrusion for rotating the pipe end.