JPH05277802A - Chamfering device of pipe etc - Google Patents

Abstract

PURPOSE:To provide efficiently a chamfered end face of high quality by means of tool cutting, by holding a tool holder having a chamfering tool for the end face of a pipe rotatably around an axial line practically concentric to the central axial line of the pipe, and by arranging the tool holder freely advancing to and retreating from the end face of the pipe. CONSTITUTION:Many pipes A are fed in parallel to each other by means of pipe feeding parts 10. And the pipe feeding parts 10 stop when the pipes A are positioned immediately in front of chuck parts 21 and 22. Next, the piston cylinder of the bottom chuck part 22 operates and a chuck piece rises to hold both ends of the pipes A by means of the upper chuck part 21. And then the rotating motor of a rotary driving part 50 is started to rotate the rotary axis of a tool holding part 30. In this condition, the cutting motor of a cutting driving unit 40 is driven to rotate a feeding screw rod, so that a feeding nut may be fed to make a supporting cylinder to approach the end faces of the pipes A. And the tool continues cutting. After finishing chamfering, a tool holder 31 retreats by operation of a cutting motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering device for pipes and the like.

[0002]

2. Description of the Related Art In a conventional apparatus of this type, a wire brush which rotates at a high speed is concentrically applied to the end surface of a horizontally laid pipe to perform chamfering.

[0003]

However, although the burr can be removed, the end face is rounded, so when high quality is required, the end face is cut again.

An object of the present invention is to solve the above problems and to provide a chamfering device for pipes or the like that can obtain a high quality end face and does not require recutting.

[0005]

In order to solve the above problems, the first structure of the present invention is as follows. That is, a plurality of horizontally laid pipes, etc. are installed in the vicinity of both ends of the pipe feeding part that feeds intermittently while maintaining parallel to each other and the pipe fed by the pipe feeding part, and while the pipe is stopped, A pipe chuck part that is gripped from above and below, and a bite holder that is installed facing both ends of the pipe that is gripped by the pipe chuck part and that has a chamfering bite on the end face of the pipe is substantially the center axis of the pipe. A cutting tool having a cutting tool that is rotatably held around a concentric rotation axis and is capable of advancing and retracting toward the pipe end surface, and a cutting motor that advances and retracts the cutting tool retention section toward the pipe end surface. And a rotary drive unit coupled to the bite holder of the bite holder and having a rotary motor for rotating the bite holder.

In the second configuration, in addition to the first configuration, the bite holding portion passes through a bite holder, a hollow rotary shaft to which the bite holder is detachably attached at the tip, and a central hole of the rotary shaft. A holder attachment / detachment rod that comes into contact with the end of the bite holder, a means for axially operating the holder attachment / detachment rod, and a support cylinder that receives the rotary shaft are included.

[0007]

Function: A large number of pipes are sent in parallel by the pipe feeding section. Then, when they are located immediately before the chuck section, the pipe feeding section stops. Next, the piston cylinder of the lower chuck portion is activated to raise the chuck piece, and both ends of the pipe are gripped by the upper chuck portion and the lower chuck portion.

Next, the rotary motor of the rotary drive unit is started,
The rotating shaft of the tool holder rotates. In this state, the cutting motor is driven, the feed screw rod rotates, the feed nut is fed, and the support cylinder approaches the pipe end surface. And the bite cuts. When chamfering is completed, the cutting motor reverses and the bite holder retracts.

[0009]

Embodiments of the present invention will be described below based on an embodiment shown in the drawings.

First, the outline of this apparatus will be described with reference to FIG. A pair of left and right first carriages 60 are mounted on the base frame 1 extending left and right.
60 are movable, and the chain loop conveyor 10 is installed in them. And these conveyors 10, 1
A large number of pipes A lying horizontally on 0 are fed parallel to each other and forward and backward in the same horizontal plane (direction perpendicular to the plane of the drawing).

The pipe chuck portion 20 installed on the first carriage 60 is located near both ends of the pipe A fed by the pipe feeding portion 10, and grips it from above and below while the pipe is stopped. The bite holder 30 is installed opposite to both ends of the pipe A gripped by the pipe chuck 20, and a bite holder 31 having a chamfering bite on the end face of the pipe is substantially concentric with the central axis of the pipe. It is held rotatably around the rotation axis and is movable back and forth toward the end face of the pipe.

The cutting drive unit 40 has a cutting motor 46 so as to move the cutting tool holding unit 30 forward and backward toward the pipe end surface.

The rotation driving section 50 is provided with the bite holding section 30.
Has a rotary motor 52 to rotate it.

The details will be described below. In Figures 4 and 5,
A pair of left and right second carriages 70 is movable left and right on the left and right portions of the base frame 1, and the frame 3 is provided thereon. The chuck portion 20 is provided on the front surface of the frame 3. That is,
An upper chuck portion 21 is provided in the middle stage of the frame 3, and a lower chuck portion 22 is attached to the lower frame. The lower chuck portion 22 is composed of an elevating guide 22a, a chuck piece 22b that moves up and down along the guide 22a, and a piston cylinder 22c that drives the chuck piece 22b.

The bite holder 30 is provided on the middle frame of the frame 3 in FIGS. Tool holder 31
Is a known one, and as shown in FIGS.
On the end face of the pipe A, a first cutting tool 31b for chamfering the outer circumference of the pipe A and second and third cutting tools 31c, 31 for chamfering the inner circumference.
d is detachably attached. The bite holder 31 is detachably attached to the tip of a hollow rotary shaft 32.

A holder attachment / detachment bar 33 for attaching / detaching the bite holder 31 to / from the rotary shaft 32 is provided so as to penetrate the center hole of the rotary shaft 32, and a removable piston cylinder 34 is coupled to the end thereof. That is, in the detachable piston cylinder 34, the spline 3 is attached to the outer periphery of the rotating shaft 32 near the end.
2a is provided, and a cylinder 34a having a spline 34b that meshes therewith is axially slidably fitted into the outer circumference. As a result, the cylinder 34a is rotated integrally with the rotary shaft 32. A piston rod 34d extending leftward from a piston 34c of the cylinder 34a is a cylinder support cylinder 34c.
It penetrates inside freely. In addition, this cylinder support cylinder 3
4c is concentrically fixed to the end of the cylinder 34a, and is rotatably supported by a bracket 34f.

A spring receiver 35 is fixed near the end of the holder attaching / detaching bar 33, and a compression spring 36 is interposed between the spring receiving 35 and the rotating shaft large diameter hole 32b. It is biased in the direction of coupling with 32. The rotary shaft 32 is rotatable in a support cylinder 37 via a bearing, and the support cylinder 37 is a linear motion bearing (L
It is supported by the frame 3 via an M guide) 38 so as to be slidable in the axial direction. An arm 39 (FIG. 4) is provided on the outer surface of the support cylinder 37.
Are fixed, extend upward, and are coupled to a feed nut member 43 described later.

As shown in FIG. 4, the cutting tool holding section 30 is moved forward and backward by the cutting drive section 40 as a whole toward the end surface of the pipe. That is, the support cylinder 38 is slidably guided to the lower surface of the slide guide 41 provided on the frame 3 via the linear bearing 42, and the feed nut (ball screw) 43 fixed to the upper end of the arm 39. Is screwed into a feed screw rod (ball screw) 44, and the feed screw rod 44 is rotated by a cutting motor 46 via a reduction gear 45.

As shown in FIG. 4, the rotary drive unit 50 is rotated by the rotary motor 32 installed at the upper stage of the frame 3 via the transmission means (timing belt and timing pulley) 51 at the end of the rotary shaft 32. It

The first and second carriages 60 and 70 are the vehicle body 6 respectively.
1, 71, wheels 62, 72, drive means 63, 73 (motors 63a, 73a, gears 63b, 73b, rack 63)
c, 73c).

The operation state will be described above. A large number of pipes A are fed in parallel by the pipe feeding unit 10. Then, when they are positioned immediately before the chuck section 20, the pipe feeding section 10 is stopped. Next, the piston cylinder 22c of the lower chuck portion 22 is actuated to move the chuck piece 2
2b rises, and both ends of the pipe A are gripped by the upper chuck portion 21 and the lower chuck portion 22. This fixes the three pipes at the same time.

Next, the rotary motor 52 of the rotary drive unit 50 is started, and the rotary shafts 32 of the bite holding unit 30 of three sets each on the left and right, totaling six sets, rotate. In this state, the cutting motor 46 is driven, the feed screw rod 44 rotates, the feed nut 43 is fed, and the support cylinder 38 approaches the pipe end surface. And byte 3
1b, 31c, and 31d cut in. When the chamfering is completed, the cutting motor 46 rotates in the reverse direction and the bite holder 31 retracts. Next, the chuck portion 20 is released, the pipe feeding portion 10 is driven to feed the pipe, and when the next new pipe comes, the pipe feeding portion 10 is stopped again and the chamfering work is performed as described above. Be seen.

Next, when exchanging the bytes, the procedure is as follows. Compressed air is supplied to the detachable piston cylinder 34 with the bite holding portion 30 separated from the pipe end surface. That is, when compressed air is supplied through the flow path 34e of the piston rod 34d and the rotary joint 34h, the piston 34c is pushed to the right and pushes the end of the holder attaching / detaching rod 33. The holder attachment / detachment bar 33 moves forward and pushes the end of the bite holder 31. At the same time, the cutting motor 46 reversely rotates, the support cylinder 38 slides on the outer circumference of the cylinder 34a, and the bite holding portion 30 retracts. As a result, the bite holder 31 comes out of the rotary shaft 32.

Since the upper and lower chuck pieces 21, 22b are as close as possible to the end faces of the pipe, the pipes do not vibrate, and their gripping surfaces are close to a perfect circle. Therefore, when the pipe A is strongly gripped, the pipe itself is straightened, so that the chamfered surface (line) of the end face of the pipe is also concentric or nearly concentric with the pipe. The present invention is also applicable to a long body such as a solid round bar.

The present invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.

[0026]

According to the first structure of the present invention, it is possible to obtain a high quality chamfered end face by cutting with a high efficiency.

With the second structure, the bite holder can be easily and quickly replaced in a short distance from the end face of a pipe or the like.
The tool holder exchange can be automated easily.

[Brief description of drawings]

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

FIG. 2 is an enlarged view of a main part (pipe feeding part) of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is an enlarged view of a main part of FIG.

5 is a right side view of FIG. 4. FIG.

6 is an enlarged vertical cross-sectional view of the right half of the main part (bite holding part) of FIG.

7 is an enlarged vertical cross-sectional view of the left half of the main part (bite holding part) of FIG.

[Explanation of symbols]

 A pipe 1 basic frame 2 rails 3 frame (left and right pair) 10 pipe feed part (left and right pair) chain loop conveyor 20 pipe chuck part (left and right pair) (front and rear 3 sets) 21 upper chuck part 22 lower chuck part 22a lift guide 22b chuck One piece 22c Piston cylinder 30 Tool holder (left and right pair) (front and rear 3 pairs) 31 Tool holder 31a Main body 31b 1st tool 31c 2nd tool 31d 3rd tool 32 Rotating shaft 32a Spline 32b Large diameter hole 33 Holder removable rod 34 Detachable piston Cylinder 34a Cylinder (rotation) 34b Spline 34c Piston 34e Flow path 34f Cylinder support cylinder (rotation) 34g Bracket 34h Rotary joint 35 Spring bearing 36 Spring 37 Direct acting bearing 38 Support cylinder 39 Arm 40 Notch drive part (left) Right pair) (3 pairs of front and rear) 41 Slide guide 42 Direct acting bearing 43 Feed nut 44 Feed screw rod 45 Reducer 46 Cutting motor 50 Rotation drive part (left and right pair) (3 pairs of front and rear) 51 Transmission means 52 Rotation motor 60 1 bogie (left and right pair) 61 vehicle body 62 wheels 63 drive means 63a motor 63b gear 63c rack 70 second truck (left and right pair) 71 vehicle body 72 wheels 73 drive means 73a motor 73b gear 73c rack

Claims (2)

[Claims] 1. A pipe feed unit for feeding a plurality of horizontally lying pipes and the like intermittently while keeping them parallel to each other, and a pipe feed unit installed near both ends of the pipe fed by the pipe feed unit and stopping the pipe. Inside, a pipe chuck part that is gripped from above and below, and a bite holder that is installed so as to face both ends of the pipe gripped by the pipe chuck part and that has a chamfering bite on the end face of the pipe is the central axis of the pipe. A bite holding portion that is rotatably held about a substantially concentric rotation axis and is capable of advancing and retracting toward the pipe end surface, and a cutting motor that advances and retracts the bite holding portion toward the pipe end surface. And a rotary drive unit having a rotary motor connected to the bite holder of the bite holder to rotate the bite holder. Chamfering device. 2. The tool holding portion has a tool holder, a hollow rotating shaft to which the tool holder is detachably attached at a tip thereof, and a holder attaching / detaching rod which penetrates a center hole of the rotating shaft and abuts on an end of the tool holder. 2. A chamfering device for a pipe or the like according to claim 1, further comprising: a means for activating the holder attaching / detaching rod in an axial direction; and a support cylinder for receiving the rotating shaft.