JPS6076909A - Pipe cutting machine for pipe manufacturing line - Google Patents

Abstract

PURPOSE:To cut a pipe without stopping the move of a continuous pipe manufacturing line by grasping and cutting said pipe to length. CONSTITUTION:A pipe A runs at a constant speed and, in order to cut it to length in succession while it is running, a free roller (not shown in the figure) for detecting length is provided in front of a shearing unit 40, the length of the pipe is measured, and a cutting signal is given. The pipe A is grapsed due to this signal and, thereby, a carriage 50 is pushed by the pipe A moving in the running direction, and the pipe A is cut to length by means of a cutter 43a. When a cutting operation is over, the grasping is released, the cutter is raised, and the carriage is returned to its original position, to repeat the following cutting processes.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention does not stop the continuous movement of tube-forming fins;
This invention relates to a device that grips and cuts a tube to a predetermined length.

Conventionally, a tube gripping device +a and a cutting device have been installed on a truck that can freely run along a guide in parallel with a tube manufacturing line. Then, when the tube comes to the cutting position, the gripping device on the cart grips the tube 17, and the tube itself pushes the cart by holding it, and the cutting FM device holds the tube at a predetermined position. After that, the grip on the tube is released, and the temporary machine WK returns the cart to the starting point of operation.

In this case, since the weight of the cart on which the gripping device and cutting device are installed is large, the inertia force at the time of starting is large, so it takes the cart from a stationary state at the starting point of operation until it reaches a speed equal to that of the leakage pipe fin and starts cutting. , it is inevitable that a slight slippage will occur between the tube and the gripping device against the frictional force between them. Therefore, in consideration of this slippage, it was assumed that the slippage was zero. Adjustments were made such as starting the gripping operation in advance by the amount of slippage from the theoretical gripping position, but the surface condition of the tube Since the frictional force is not constant, the position at which the tube can be finally gripped and fixed is not constant, which causes a problem in that the cut length of the tube varies. In addition, since the inertia of the cart is large, in order to push the cart without buckling the tube, the wall thickness and diameter of the tube must be above a certain level, which limits the range in which pipes can be manufactured. was there.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an apparatus that has a constant tube cutting length and is capable of cutting even small-diameter tubes.

In order to achieve this object, the first structure of the present invention is to reciprocate the first cart 20 installed on the base lOO so as to be able to reciprocate in the axial direction of the tube A, and the first cart 20 to reciprocate. a traveling part 80 having a traveling drive source 82; and a cutting vr part 4 provided on the first truck 20 to cut the pipe A in the diametrical direction.
0, a $2 truck 50 installed on the first truck 20 so as to be able to reciprocate in the axial direction of the tube A, and a $2 truck 50 installed on the second truck 50 so as to grip the tube A in the diametrical direction. Instead of the traveling drive source 32 installed between the chuck portion 60, the first cart 20, and the second cart 50, which move the first cart 20 and the second cart 50 together and fixed therein, the first cart 2° is replaced by a pipe feeding system. The reason is that a travel drive source is provided that causes the vehicle to move backward in the opposite direction.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

- The base 10 is provided with first guide bars 11 on both sides along the axial direction of the pipe.

The first cart 20 includes a first rectangular frame 21 constructed on the base 10 so as to be movable back and forth in the narrow direction of the pipe A via a first sled 22 slidably inserted into the first guide bar 11. and,
It consists of second guide bars 23 provided on both sides of the first rectangular frame along the axial direction of the tube A. The LL8 (limit switch) 18 detects the contact between the first cart 20 and the base 10 at the start point of the operation of the first cart 20, and also buffers the first cart 20 with respect to the base 10 at the start point of the operation. Shock dampers 12 are each attached to the base 10.

In the traveling section 80, the first truck 20 is connected via a bracket 81.
a travel hydraulic motor 32 attached to the travel motor; a pinion 38 attached to the shaft end of the travel motor;
With the hook 84 fixed to W; 1, the carriage 20 is driven in the running direction of the pipe A, and is driven in the opposite direction by reversing the running direction.

The cutting section 40 connects a frame 41 which is swingably supported at one end on the first cart 20 via a pin along the 1#i right angle surface of the pipe A, and at the other end of the frame 41. A cutter feed section 42 supported on the first carriage 20 via a first cylinder 42a, and a cutter drive section 48 which is a hydraulic motor attached to the frame 41 so that the pipe A can be cut diametrically with a cutter 48a. Consisting of

Further, a second LS (') 24 is attached to the first truck 20 to detect the position of the frame 41 when the cutter 48a finishes cutting the pipe A.

The second truck 50 is mounted on the first truck 20 so as to be movable back and forth in the axial direction of the tube A via a second sleeve 62 that is slidably inserted into the second guide bar 23 of the first truck 20. It has a second rectangular frame 51 that is constructed.

In order to detect that the first truck 2o has contacted the rear end of the second truck 50, an 8L8 is attached to the rear end of the second truck 50.
6 B is installed.

A-14 Kamesu h ff/I/I mue-kAj-1 翳↓ya 1, 5λshi-H ~ The second
It consists of a first chuck claw 61a and a second chuck claw 61b which are disposed opposite to each other on the trolley 50, sandwiching the pipe A therebetween, and a fitting and disengaging mechanism 1N62 for fitting and removing the first chuck claw and the second chuck claw. In the fitting/detachment mechanism: the telescopic end of the second cylinder 62a attached to the second truck 50 is connected to the first
An M1 chuck 62b that is connected to the chuck claw 61a and extends below the second chuck claw 61b is directly connected to the first chuck claw 61a.
The hook 62-d is arranged oppositely and engages with the second hook 62-d.
di The second carriage 50 is held between a support roller 62e rotatably supported by the second carriage 50 and a pinion 62c.
It is directly connected to the chuck claw 61b.

The second truck lock cylinder 70 is attached to the first truck 20, and is fixed to the first truck 20 by pushing the second truck 50 with a piston rod.

Here, when the traveling motor 82 freely drives only the first truck 20, it gives the first truck a speed that is slightly faster than the traveling speed of the circular pipe A. Further, after the first cart 20 catches up and contacts the second cart 50 which is being moved by the pipe A by gripping the dA with the chuck portion 60, the driving force of the travel motor 82 is transferred to the chuck portion 60. The gripping force on the tube A is set to be smaller than that of the gripping force on the tube A. Therefore, the first truck 20 pushes the rear end of the second truck 50 with the driving force of the travel motor 82, and both move together at the same speed as the pipe A.

Next, the operating state will be explained above. At the cutting standby position (starting point of operation) for pipe A, the first truck 20 is in contact with the rear end of the second truck 50 and is in the combined position of both, but the operating position IM of the $2 truck lock cylinder 70 is when both are fixed. is released.

Bone A runs at a constant speed, and in order to sequentially cut it into predetermined lengths while running, a free roller for length detection is installed in the front stage of the cutting machine, and a bass generator is attached to this. By directly connecting it, measure the length of the vibrator and cut it to the point ff14.
detects this and issues a disconnect signal.

In response to the cutting signal for the pipe A, the chuck part fitting/disengaging mechanism 6
2 is activated, and the first chuck claw 618 and the second chuck claw 61b grip the tube A. In this case, first, the second cylinder 62a moves the first chuck claw 61a in the tube gripping direction, and at the same time the first hook 62b1 and pinion 62c move.

The second chuck 4-61b moves in the circular tube gripping direction via the second chuck 62d and grips the tube A.

By this grip, the second cart 6o is pushed by the circular tube A and starts moving in the running direction. This is it, -8th LS5B
detects the separation of the second truck 5o and the first truck 2o, and in response to this signal, the first truck 2o is moved by the running section 80 in the running direction of the circular pipe A, that is, the second truck 50. Start running at speed. Thus, the first truck 20 becomes the second truck 5.
When it catches up with O and then touches the green, the 8th LS5B detects this, and this signal activates the second bogie lock cylinder 70 to move the second bogie 6o between the first bogie and cut the cutter by the cutter drive unit 48. 488, the first V cylinder 42a of the cutter feeding section 42 is operated to cut the pipe A with the cutter 48a.

When the cutting is completed, the second LS 24 detects this and activates the cutter feed section 42 based on this signal, and the cutter 4
After pulling the tube 8a away from the pipe A and returning it to the cutting standby position, the chuck part 6o is activated to release the grip on the pipe A, and the first cart 20, with the second cart 50 still combined and fixed, is moved to the traveling section 80. to move it in the opposite direction of travel into the tube.

When the first truck 20 returns to the operation starting point, the first L818 detects this and stops/stops the traveling motor 82, and at the same time activates the second truck lock cylinder 70 to
The truck 50 is released from being fixed to the first truck 20. This state is a standby state for the next cycle, and when the next cutting start signal comes, the same operation as above is repeated.

In the traveling section 30, a traveling motor 82 and a chain, or a traveling cylinder whose base end is connected to the base 10 and whose tip end is connected to the first truck 20 may be attached. In this case, the pushing force of the traveling cylinder is smaller than the gripping force of the chuck part 60 on the pipe A, and the traveling cylinder is
The speed at which the tube A is moved is set to be slightly faster than the traveling speed of the tube A when the chuck section 60 grips the tube A. Thus, the travel cylinder is connected to the travel motor 82,
It can perform the same function as a combination of a binion and a rack, or a sprocket and a chino.

In addition, if the wall thickness and diameter of the pipe A are sufficiently large so that there is no risk of buckling, the s1 bogie 20 and the second bogie 60 may be fixed together with the second bogie lock V cylinder 70, and the bogie In the outgoing stroke, the connection between the running section 80 and the first truck may be released, and the truck may be sent by the pushing force of the pipe A. In this case, in the backward stroke, the truck is returned to its original position by the traveling section 80 or a dedicated drive source such as a cylinder.

As described above, the present invention has a small inertia force of the second cart, so that the chuck section grips the pipe with little slippage, and is less susceptible to changes in frictional force due to the surface condition of the pipe. The cutting location is constant, and the variation in cutting length is reduced compared to the conventional method. Furthermore, since the second truck has a small inertia, even if a tube with a smaller diameter is buckled, it can be cut while pushing the second truck.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a front view,
FIG. 3 is an enlarged sectional view of n[-111 in FIG. 2. A...Pipe, 10...Base, 20...First truck, 8
0... Traveling section, 82... Traveling motor, 40... Cutting section, 50... Second machine! , 60... Chuck part, 7
0-...Lock cylinder applicant: Nisshin Steel Co., Ltd. agent Patent attorney Shinpei Inukai

Claims (3)

[Claims] (1) The base 10 is designed so that it can freely reciprocate in the axial direction of the custodian.
A first truck 20 installed thereon, a traveling section 80 having a traveling drive source 82 for reciprocating the first truck 20, and a pipe A.
a cutting section 40 provided on the first cart 20 to cut the pipe A in the diametrical direction; and a second cart 50 installed on the first cart 20 so as to be able to reciprocate in the axial direction of the tube A. and,
A chuck part 60 is provided on @origin part 2 containing wheel 50 so as to grip the pipe A in the diametrical direction, and the first cart 20 and the second
A tube cutting machine for tube making fins, characterized in that it includes a second truck lock cylinder 70 installed between the truck 50 and the truck 50 so as to be fixed together. (2) The first truck 20 is installed on the base 10 so as to be able to reciprocate in the axial direction of the pipe A, and the 4#1 necessary market 9^ is reciprocated in the axial direction of the pipe A. A traveling part 80 having a traveling drive source 82, a cutting part 40 provided on the first cart 20 to cut the pipe A in the diametrical direction, and a cutting part 40 that can freely reciprocate in the axial direction of the pipe A. A second truck 50 installed on the first truck, a chuck part 60 provided on the second truck 50 to grip fA in the diametrical direction, a front E3 first truck 20 and a second truck 50. A pipe cutting machine for a pipe production line, characterized in that it includes a second carriage lock cylinder 70 installed between the two so as to unite and fix the two. (3) A pre-cutting machine for a pipe-making line according to claim 1, wherein the traveling drive source 82 is a hydraulic motor.