JPS59124532A - Method and device for cutting off and chamfering pipe - Google Patents

Abstract

PURPOSE:To accurately and uniformly chamfer pipes of prescribed length, by conveying the pipes one after another at an interval in a direction perpendicular to the axial direction of each pipe, to cut off the pipe to the prescribed length and chamfer its cuf-off end. CONSTITUTION:Pipes A to be processed are brought one after another from a pipe supply section 3 onto a lop conveyor 11 so that the pipes are put on the pillows 12b of pipe placing portions 12 provided at prescribed intervals on the conveyor. The pipe A on the pillow 12a is pushed and locked by a push lever 12b, which is turned by causing a cam roller 12e to go on the lifting part S of a cam 13 as chains 11a revolve. The locked pipe A conveyed to a pipe cutoff section 1 is cut off at a prescribed part by a grindstone 1a. After that, the cut-off end of the pipe is ground for chamfering by the wire brushes 2a of a first and a second chamfering sections 2, 2. The pipe A is thereafter released from the push lever 12b so that the pipe rolls down onto a support roll 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method and apparatus for cutting a tube into a certain length and polishing and chamfering the cut surface.

In this conventional cutting device, a large number of pipes to be cut are held horizontally in parallel with small pinches, and then a cutting grindstone and a chamfering wire plan are moved relative to a fixed member.

In the case of small-diameter pipes, such conventional equipment not only does not transfer the pipe smoothly to the pipe device members, but also requires the removal of heavy materials such as cutting wheels and chamfering wheels. There were problems such as chips and dust reaching the moving parts and causing premature wear. Furthermore, when a large number of pipes are pushed and rimmed at the same time, the cutting edge surface of the grindstone escapes and the cut surface becomes oblique with respect to the pipe axis. Furthermore, since a large number of wires are chamfered at the same time, there are places that cannot be reached by the wire brush, making it difficult to chamfer uniformly.

The present invention eliminates the above-mentioned drawbacks, and ensures that the tube to be processed can be transferred to the tube foot rest of the conveyor regardless of the diameter of the tube, is less prone to failure, and the cut surface is aligned with the axis of the tube. It is an object of the present invention to provide a method and a device for making the edges accurately at right angles and uniformly chamfering the edges.

In order to achieve all of the above objects, the first invention provides a step of feeding the tubes one by one at intervals, a step of cutting the limb tubes into a predetermined length, and a cut surface of the cut tubes. This is a method for cutting and chamfering a pipe, including the step of recessing the pipe.

The second invention is a loop conveyor that conveys tubes one by one at intervals, and an energy-saving device that grips and fixes the tubes held at 5 degrees at the upstream portion of the conveyance surface of the conveyor and releases them at the downstream end. The pipe cutting part and the pipe chamfering part are installed in order from the upstream side to the downstream side of the conveyor in the feeding direction.

Furthermore, the third invention includes a rotating drum having a horizontal axis of rotation for transporting water at an interval of one water dropout, and a pipe that is transferred at an upstream portion of an upper half conveying surface of the rotating drum and is gripped and fixed, and released at a downstream portion. The apparatus includes a power-saving placing part, and a pipe cutting part and a pipe chamfering part which are installed in order from the upstream side to the downstream side of the rotary drum in the feeding direction.

The present invention will be explained below based on an embodiment shown in the drawings.

In FIGS. 1 and 2, the apparatus 10 according to the second embodiment of the invention includes a loop conveyor 11 for conveying the pipes A to be processed at a constant interval of one water drop, and a loop conveyor 11 for transporting the pipes A to be processed at a constant interval, and a power saving unit 12 that is gripped and fixed at the downstream end of the conveyor 11 and released at the downstream end; a pipe cutting unit l provided on the upstream side of the conveyor 11 in the feeding direction;
It has a plurality of pipe chamfered parts 2, 2 disposed on the downstream side thereof. Therefore, the loop conveyor 11 has a chain wheel 11bK.
The loubution chain 11a is driven by the loupe chain 11a, and the power-saving parts 12 are attached at regular intervals to the loubutien 11a. This power-saving unit 12 is fixed to one chain link IIC of the f-enlla, and includes a pillow member 12a having a V-shaped groove in which a pipe can be placed, and a pin 12C pivoted to the pillow member 12a in a lever-like manner. and one end thereof is the pillow member 12a.
A pressure lever 12b that presses the upper vA, a spring 12d that is provided between the pressure lever 12b and the chain link IIC and biases the suppression lever +1 in the direction of pressing, and a spring 12d that is provided at the end of the pressure lever 12b. cam roller 12e. The surface on which the cam roller 12e rolls is located at the upstream end along the backward movement direction of the conveyor 11.
It is a fixed lever operating cam 18 that converts to a large lift and returns to the original small lift at the downstream end.

A disk-shaped cutting wheel 1a is provided in the tube cutting section 1 and is rotated by a motor 1b.

The pipe chamfered part 2 consists of eight disk-shaped chamfered shear brushes 2a which are rotated by a motor 2b and arranged at the apex positions of an equilateral triangle so as to revolve around the axis of the motor 2b. .

Further upstream of the loop conveyor 110, there are provided a plurality of parallel positioning loops 31 and a tube supply section 3 (see FIG. 4) consisting of a positioning plate 32 provided on the side of the roller. 'The positioning roller 31 is rotated in the direction in which the tube to be processed A placed thereon is moved to the positioning plate 82.

In addition, 4 shown in FIG. 1 is a chamfering head having a cutting tool for removing any burrs remaining from cutting the bone A after the above-mentioned processing, and 5 is an operation of the chamfering head 4. Middle tube A
A divisible drum-shaped support roll 6 is a transport roll that transports the product along the tube axis direction.

The above-mentioned loubutien lla and the power saving unit 12 are provided in pairs on the left and right sides, respectively, with respect to the direction of movement of the tube.

Next, the axis method will be explained. In the present invention, the tube A has 1 water dead space 15? Cutting of the tube W, which includes a step of cutting the limb tube A into a predetermined length, and a step of chamfering the cut surface of the cut tube. , which is a chamfering method. That is,
The pipe A to be processed is fed by the pipe supply section 3 so that one end thereof is connected to the plate 3.
The pillow members 12a are aligned in contact with the pillow members 12a and are sequentially supplied onto the loop conveyor 11 along the inclination of the supply section 3.
will be placed on. After the tube A is supplied onto the pillow member 12a,
As the Louboutin lla circulates, the cam roller 1.28 of the suppression lever 12a is pushed open by the lifting lift section (S in Fig. 2) provided upstream of the lever operating cam 13, suppressing the pipe A on the pillow member 12a. Fix it. While maintaining this state, the pipe A is moved downstream and reaches the pipe cutting section 1, where it is cut at a predetermined location by the cutting grindstone 1a. And the next one. Proceeding to the second management section 2, 2, the cut surface of the tube is polished and chamfered by a wire brush 2a. In this way, when the chamfering on the loop conveyor 11 is completed, the pressure exerted by the pressure lever 12b is released by the downward lift part t provided at the downstream end of the pipe A, and the pipe A is released from the pillow member 12a. It falls off and slides down to the next support roll 5.

The support roll 5 is divided into two parts at the smallest diameter part, and when the left half separates and retreats downward, the product is fed to the transport roll 6.

8 and 4 show an embodiment of the eighth invention. According to the apparatus 20 of this embodiment, a rotating drum 21 is used in place of the loop conveyor 11 of the first example, and a holding section 22 is provided around the rotating drum 21. That is,
This embodiment includes a rotating drum 21 having a horizontal axis of rotation for feeding the tubes A at intervals of one tree length, and a rotating drum 21 that grips and fixes the fed tubes A at an upstream portion of the transport surface of the upper half of the rotating drum 21. The tube cutting section 1 and the tube chamfering section 2 are installed in order from the upstream side to the downstream side of the rotary drum 21 in the feeding direction.

The rotating drum 21 has an end plate 21a that is rotationally driven by a rotation 9 of a horizontal fixed drum shaft 21d, and one left and right end plates 21a, 21a.
The connecting rod 21C that is integrally assembled is removed.

The positive positioning section 22 includes a suppression lever 22b, a bottle 22C, a bar 22d, and a-ra 2 similar to those in the second example embodiment.
2e, and actuates 1.2e against the suppressing portion of the lever 22b. Okay, well, the piston cylinder mechanism 22, which is commonly used in 2.
Consists of a. A lever actuating cam 28 fixed to the drum shaft 21d has a generally circular shape that is close to and parallel to the rotating drum 21a, and has an ascending lift portion S and a downstream portion located at a position corresponding to the upstream portion of the conveying surface of the upper half of the rotating drum 21. It has a descending lift part t at a position corresponding to .

The pipe A to be processed is fed by the pipe supply section 3 so that one end thereof is connected to the plate 32.
The material is aligned in contact with the drum, and is sequentially supplied to the holding part 22 provided on the outer peripheral surface of the rotating drum 21 at the upstream part of the rotating drum 21 on the inclined surface of the supplying part. This positive placement part 22
Immediately after the pipe A is supplied to the air cylinder 22a,
operates to push up the chain pipe A, and at the same time, the upward lift S of the lever actuating cam 23 operates, and the pressing lever 22b
The pressing part is pushed down, and the entire tube A is gripped and fixed between these two parts. Then, as the rotating drum 21 rotates,
After being cut at the tube cutting section 1, the pipe is chamfered to the tube chamfer section 2. The pipe that has been cut and chamfered in this way is carried to the downstream part along the surface of the rotating drum, and the lever suppressing part is opened at the lowering part t, and at the same time, the air cylinder 22a is also moved back and is gripped and fixed. The tube is released and flowed to the next process. In this embodiment, the cam lift S and the air cylinder 22a sandwich the pipe, so it is very strongly fixed. However, since the cutting and chamfering is performed during one revolution of the rotating drum 21, the entire device is compact. It doesn't take up much space.

Since the present invention is constructed as described above, it is possible to easily and reliably fix the workpiece 'W' at the fixed position regardless of the size of the pipe diameter, and when cutting, the workpiece 'W' can be cut at right angles to the axis of the pipe. In addition, the chamfering after cutting can be performed correctly and uniformly, improving the quality of the product.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the No. 1 Hatsuo, Fig. 2 is an enlarged side view of the main parts thereof, and Fig. 3 is a side view of an embodiment of the No. 1 Hatsuo.
Figure 4 is a plan view. A... Pipe, 10... Second invention device, 11... Loop conveyor, 12, 22... Positive placement part, ta, 2a.
...Shibar operating cam, 2o...Third invention device, 21.
... Rotating drum, 1... Pipe cutting section, 2... Pipe chamfering section, 3... Pipe supply section, 4... Bit chamfering head, 5.
...Support roll, 6...Transportation roll Agent: Patent attorney Shinpei Inukai

Claims (3)

[Claims] (1) Cutting the tube, which includes the steps of feeding the tubes one by one at intervals, cutting the limbs to a predetermined length, and chamfering the cut surface of the cut tube. Shiratatori method. (2) a loop conveyor that conveys the tubes one by one at intervals, and a tube holding section that grips and fixes the delivered tubes at the upstream end of the conveyance surface of the conveyor and releases them at the downstream end; A pipe cutting and chamfering device including a pipe cutting part and a pipe chamfering part installed from the upstream side to the downstream side in the feeding direction of the conveyor. (3) A rotating drum with a horizontal axis of rotation that transports pipes at intervals of one tree length, grips and fixes the delivered pipes at the upstream part of the upper half of the transport surface of the rotating drum, and holds and fixes the pipes at the downstream part. A pipe cutting and chamfering device comprising: a pipe fixing part that releases the pipe; and a pipe cutting part and a pipe chamfering part which are sequentially installed from the upstream side to the downstream side of the rotary drum in the feeding direction.