JPH01199712A - Milling type pipe cutting device - Google Patents

Abstract

PURPOSE:To prevent the oscillation of even a small diameter pipe and reduce a carry-in/carry-out time by pressing a pipe to be cut against reference rollers by means of pressing rollers in positions separate from and close to a cutter across the cutter to perform positioning and carrying out cutting from the reference roller side. CONSTITUTION:Arms 8C, 8A are oscillated by means of front and rear and center oscillating devices 9C, 9A and a pipe P to be cut is supported by pressing rollers 10A, 10B, 10C and pushed up to be positioned, and clamped in positions close to and separate from a cutter 5. After lowering the cutter 5 down to the outer periphery of the pipe P by means of a lifting device 4, cutting is carried out through a rotating device 6 and reference rollers 7C and pressing rollers 10C are rotated by means of motors 16 via belts 17 to rotatingly feed the pipe P. Since the pipe P is pressed against the reference rollers 7A, 7B, 7C with the cutter 5 carrying out a cutting operation from the reference rollers 7A, 7B, 7C side, any unexpected behavior of the pipe P against the cutter 5 can be prevented. Accordingly, since the pipe P is also supported in close positions to the cutter 5, even a small diameter pipe can undergo rotating cutting without causing oscillation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a milling-type pipe cutting Igr device that rotationally cuts a pipe to be cut, such as a steel pipe, with a milling cutter.

[Conventional technology and its problems]

Conventionally, this type of milling-type pipe cutting device has a pair of tunnel-structured pipe rotary clamp devices arranged in series in a pipe conveying path consisting of a V-roller conveyor, and a plurality of pipes to be cut are arranged at equal angular intervals around the outer circumference of the pipe rotating clamp device. The material is clamped and supported by two chucks and rotated while floating above the conveyance path and cut with a milling cutter between the clamp devices.

With this conventional device, there is no unexpected behavior in the relative positional relationship between the milling cutter and the pipe to be cut during cutting.
High-efficiency cutting with a milling cutter is possible with no blade spillage, but when handling the pipe to be cut, the procedure is as follows: After cutting, the split pipe must be carried out through a rotary clamp device with a tunnel structure. After this, a new long pipe must be inserted from one end into a rotary clamp device with a tunnel structure, and it takes a lot of time to handle these pipes.
Cutting machines have been forced to stop working, which is an obstacle to improving operating rates.

In addition, in the conventional device, the rotary clamp device is large-scale, and since the cutter head is placed between the rotary clamp devices, the distance between the pair of rotary clamp devices is large, and when rotating a small diameter pipe, The pipe is easily bent by being pushed by the milling cutter, and vibrations are generated when the pipe is rotated and cut.This vibration causes the milling cutter to chip, resulting in a shortened cutter life.

[Purpose of the invention]

The present invention was made in order to solve the above-mentioned problems of the conventional art, and enables cutting of small-diameter pipes using a milling cutter while rotating stably without causing vibration, and also enables quick cutting of pipes. The purpose is to improve the operating rate of milling-type pipe cutting equipment by enabling loading and unloading.

[Means for Solving the Problems] The milling-type pipe cutting device of the present invention includes a cutting machine frame provided with a milling cutter, at a position separated across the milling cutter and at a position near both sides of the milling cutter.
A freely rotatable reference roller is provided so that the reference rollers form a series of the same reference surface, and the cutting machine frame is provided with a pressing mechanism that rotates while pressing the pipe to be cut against the reference roller and moves toward and away from the reference roller. The milling cutter is provided with a roller, the milling cutter is moved back and forth toward the pipe to be cut from the reference roller side, and the reference roller or the pressing roller is rotationally driven.

〔Example〕

In the figure, reference numeral 1 denotes a cutter head, which is mounted on a saddle 3 provided on a cutting machine frame 2 so as to be able to rise and fall, and is raised and lowered by a lifting device 4.

Reference numeral 5 denotes a milling cutter, which is provided on the canterhead l and is rotated around a horizontal axis by a rotating device 6.

7 (7A, 7B, 7C) are reference row arms, which are rotatably attached to the cutting machine frame 2 and are used for milling cutter 5.
They are placed at positions separated from each other in the direction perpendicular to the two sides.

8 (8A, 8C) is a pair of arms, and each reference roller 7 ( 7A, 7B or 7C), and the cutting machine frame 2 is placed on the milling cutter 5 side.
It is pivotally attached to and is swung by a swiveling device 9 (9A or 9C) (a cylinder in the embodiment).

10 (IOA, IOB, l0C) is pressed by a roller,
It is pivotally supported at the tip of each arm 8 (8A, 8C).

11 is a pulley coaxially connected to the reference roller 7C; 12
13 is a pressing pulley coaxially connected to the roller IOC.
is a pulley provided on the pivot pin of the arm 8c, 14 is a pulley pivotally supported on the cutter frame 2 between the pulleys 11 and 13, and 15 is attached to the output shaft of the motor 16 provided on the cutter frame 2. A belt 17 is wound around these pulleys so that the reference roller 7C and the pressing roller IOc can be rotated in the same direction.

Since the belt 17 loosens as the arm 8C swings, the cutting machine frame 2 is provided with a belt tensioning pulley 19 that can move forward and backward relative to the heald 17 using a cylinder 18 or the like to absorb the loosening. In addition, the reference roller 7c
and pressing the roller lOC with the belt transmission mechanism 11 to 15.1
7 has been described, but as a pipe rotation support mechanism in place of the roller 1O, a driving pulley 20 and a driven pulley 21 are installed at both ends of the arm 8C as shown in FIG. Provided, both pulleys 20,
The same effect can be obtained by winding the belt 22 between the arms 8C and providing a support roller 23 for supporting the pipe P to be cut via the belt 22 on the opposite side of the arm 8C.

7A and 7B are reference rollers, and the reference roller 7A is attached to the cutting machine frame 2 so that it has the same lower surface as the reference roller 7C.
Further, reference rollers 7B are freely rotatably supported by the cutter head 1, and are arranged near both sides of the milling cutter 5.

10A and IOB are pressed by rollers, which are arranged facing each other so as to approach or separate from each other across a straight line passing through the rotation centers of the milling cutter 5 and reference rollers 10A and 10B when viewed from the front, and are oscillated by a oscillating device 9A. A pair of arms 8A are pivotally connected to the cutting machine frame 2 on the side of the milling cutter 5.
It is an integrally constructed pressing roller that is pivotally supported at the tip and has a cutter release groove 10' formed in the middle part for allowing the milling cutter 5 to escape when cutting a small diameter pipe.

A plurality of cutting machines as described above are arranged at intervals on the same center line, so that one pipe P to be cut can be divided into a plurality of pieces at the same time.

Reference numeral 27 denotes a conveyance table, which is disposed below the cutting machine and is inclined from one side to the other side in a direction perpendicular to the cutting machine center line.

Reference numerals 28 and 28' denote stoppers, which are provided so as to be retractable from above the table surface so as to stop the pipe P to be cut rolling along the inclination of the conveyance table 27.

A lifter 29 is provided on the conveying table 27 so as to be able to lift the pipe P to be cut, which is stopped by a stopper 28'' directly below the reference rollers 7A, 7B, and 7C.

[For production]

After the pipe P to be cut is transferred on the conveyance table 27 and stopped by the stopper 28 at a position directly below the reference rollers 7.7B and 7C, the lifter 29 is raised, and the pipe P to be cut is transferred to the position directly below the reference rollers 7.7B and 7C. while being supported by the reference roller 7.
．． 7B.

It is raised to a position where it comes into contact with the lower surface of 7C or a position near it (carrying in).

Next, the arm 8 (
8A and 8C) are swung toward each other, and the pipe P to be cut is pressed by rollers IOA, IOB, and IOB.
The reference roller 7A is pushed up while being supported by the OC,
These rollers 7 and IOA, 7B and IOB, and 7C and I
The milling cutter 5 is clamped and supported at three locations by the OC, near and far away (positioning clamp).
.

Next, after the milling cutter 5 is fed with a downward stroke to a position in front of the outer circumference of the pipe P by the lifting device 4, the cutting feed is applied to the milling cutter 5 using the rotating device 6, so that the outer circumference of the milling cutter 5 is aligned with the inner circumferential surface of the pipe. The cutting operation only stops when the cutting edge passes through the hole. At this time,
The reference roller 7B supported by the cutter head 1 forms a series of reference lower surfaces with the other reference rollers 7A and 7C. Next, when the reference roller 7C and the pressing roller 10C are rotated by the motor 16 via the belt transmission mechanism 10 to 15.17, the pipe to be cut P is rotated and sent toward the milling cutter 5 which is being driven and rotated. When it rotates, the cutting is complete. In this case, the pipe P to be cut is the reference roller 7A.
, 78.7C, the position at which the milling cutter 5 starts cutting into the pipe P remains constant regardless of the pipe diameter. During this cutting, the cutter (cutting chip) is cut between the pipe P to be cut and the clamp roller, especially the reference roller 7 (7A, 7B).

7C), an unexpected behavior occurs in the relative positional relationship between the cutter 5 and the pipe P.

The cutting action is applied from the 7C) side, and the unexpected behavior of the pipe toward the cutter is controlled by the stationary reference roller 7 (7
A, 7B, and 7C), the cutter is not subjected to sudden feeding action and cutting by the milling cutter is maintained without any blade spillage. Furthermore, since the pipe P to be cut is clamped and supported near the milling cutter 5, vibrations do not occur in the case of small diameter pipes, and stable rotational cutting is performed.

After cutting, each cut pipe is unclamped by swinging the arms 8A and 8C away from each other in the reverse procedure to the above, and the divided pipe is transferred onto the lift 29 from its body side, Next, by the lowering operation of the lifter 29, it is transferred onto the conveyance table 27 and conveyed to the next process.

〔Effect of the invention〕

As described above, the present invention positions the pipe to be cut by pressing it against the reference roller by pressing and rowing at a remote position across the milling cutter and at a position near both sides of the milling cutter, and causes the milling cutter to perform cutting from the reference roller side. This prevents the rotary behavior of the pipe to be cut toward the milling cutter due to the cutter and the cutter press vibration in the case of small-diameter pipes, and allows the milling cutter to maintain light cutting without causing blade spillage. On the other hand, pressing moves the rollers closer and farther apart, so new long pipes and split pipes can be inserted into and removed from the rotary clamp device from the body of the pipe. This reduces the loading and unloading time and makes it easier to operate the milling type pipe cutting device. The rate could be significantly improved.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention; Fig. 2 is a front view taken along the line ■; Fig. 2 is a partially cutaway side view of Fig. 1; Fig. 3 is a plan view of Fig. 2; The figure shows the roller drive system, and is a front view taken along line 2 in Figure 2. Figure 5 is a schematic diagram showing a pipe rotating clamp mechanism according to another embodiment of the present invention.
FIG. 3 is a partial front view taken along the line ■ in the figure. 5...Milling cutter, 7A, 7B, 7C.
...Reference roller, E3A, 8C...Arm, 9A. 9C... Rocking device, IOA, IOB, IOC・
・・Pushing is done by roller, 11, 12, 13, 14, 15゜1
8...Pulley, 16...Motor, 17
...Belt, 20.21...Pulley,
22...Belt, 23...Support roller, 10゛...Cutter relief groove.

Claims (1)

[Claims] (1) Install freely rotatable reference rollers on the cutting machine frame equipped with the milling cutter at a position away from the milling cutter and at positions near both sides of the milling cutter so that these reference rollers form a series of identical reference surfaces. and the cutting machine frame is provided with a pressing roller that rotates and approaches and separates from the reference roller while pressing the pipe to be cut, and the milling cutter moves back and forth toward the pipe to be cut from the reference roller side. has been carried out, and
A milling type pipe cutting device characterized in that the reference roller or the pressing roller is rotationally driven.