JPH07100253B2 - Pipe shearing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pipe fed to the front of a quill, which is reinforced by a core metal and sheared between a quill and a cutter that reciprocates in sliding contact with the front. The present invention relates to a pipe shearing device, and more particularly to a pipe shearing device in which the structure of a stopper for stopping a fed pipe at a fixed position and an extruding member for pushing out a sheared pipe and discharging it from a core metal is improved.

2. Description of the Related Art Problems to be Solved by the Related Art and Invention Conventionally, as a pipe shearing device, a quill is attached to a delivery end of a material supply hole provided through a frame, and a reciprocating motion is performed in front of the quill in a direction perpendicular to an axis of the quill. Attach a ring-shaped cutter that slidably contacts the front of the quill to the actuating body, and when the actuating body is in the shearing position where the cutter and the quill are concentric, feed the pipe from the material supply hole to the front of the quill, and It fits tightly around the circumference, and the cutter penetrates the fixed cored bar that is inserted from the back into the hollow of the cutter from the actuating body so that the tip surface slides on the front surface of the quill. While striking the stopper provided on the body, the floating core metal that is fitted almost tightly to the inner circumference of the pipe in the quill is pressed against the fixed core metal by the frictional force associated with the delivery of the pipe. By moving the operating body from the shearing position to the side discharge position and sliding the cutter on the front surface of the quill, the pipe is sheared, and the pushing member provided on the operating body is advanced at the discharging position. There is known a device which discharges a sheared pipe from a fixed cored bar.

Although such a core bar type pipe shearing device has an advantage that it can be sheared without deformation of the sheared portion like a solid material of the pipe, it is mounted on the stopper while fitting the delivered pipe onto the fixed cored bar. Since it is necessary to discharge the pipe that has been abutted and sheared while removing it from the fixed core metal, the structure of this part is, for example, as described in Japanese Patent Laid-Open No. Sho 63-169211, behind the cutter of the operating body. A stopper mounting body is arranged at a position, and a stopper having three protruding ridges provided with flanges on the outer peripheral surface is housed in a holder in a mounting hole formed concentrically with the cutter. A fixed cored bar is attached to a support rod protruding from the center of the stopper's tip surface, and an extruded tube with a long groove that fits into the stopper's ridge is inserted between the stopper and holder so that the spring can move forward and backward. Resilience is urged by the elasticity and the collar at the tip is The movement is regulated by hitting the stepped part of the da, and the tip of the pipe sent out through the inside of the cutter while fitting on the fixed cored bar is abutted against the stopper of the stopper and the flange of the extruded pipe to stop, and after shearing, Ejecting the sheared pipe from the fixed core by advancing the extruded pipe against the spring resilience has been extremely complicated, and a simplification thereof has been desired.

Means for Solving the Problems The pipe shearing device of the present invention has been completed in view of such circumstances, and the rear end portion of the fixed core metal is formed at the rear position of the cutter of the operating body. Insert it with a clearance in the mounting hole, fix the mounting hole with a mounting pin that penetrates in the radial direction, and at the outer periphery of the fixed cored bar, use a tube that also functions as a stopper and an extruding member. Push the rear end of the pipe at the discharge position, and the abutment member that fits freely into the transparent axial long groove through the mounting pin and hits the rear end of the pipe at the shearing position. The moving member for moving forward is provided.

The operation and effect of the present invention has the above-described configuration, and when the pipe is fed out at the shearing position, the pipe is forward fitted while being fitted onto the fixed cored bar in the cutter and pushing the pipe body backward, and the rear end of the pipe body is projected. When the pipe stops when it hits this member and the pipe is sheared by the movement of the operating body to the discharge position, the moving member pushes the rear end of the pipe body and the sheared pipe is pushed out by the pipe body. And the stopper part that acts to be discharged from the fixed core bar and that is installed in the actuating body and that stops the sent-out pipe,
The extruded part that pushes out the sheared pipe and discharges it from the fixed core bar, attaches the long groove on the outer periphery to the fixed core bar that fixes the tube body that doubles as the stopper and the extruding member with the connecting pin in the mounting hole of the operating body By passing through the pin, the structure is simply retracted until it hits an abutting member provided separately from the actuating body, and is also fitted so that it can be advanced by a moving member also provided separately, which simplifies the structure. In addition, it has the effect of being robust because of its simple structure.

Examples Hereinafter, one example in which the present invention is applied to a material pipe supply portion of a pipe forma for forming a pipe will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 is a main body frame in which forging dies are arranged in parallel, and the pipe a is subjected to forging forming between a main frame and a punch attached to a ram moving forward and backward.
A continuous pipe a is sent from the rear surface to the front surface on a shearing surface 2 provided at one end of the main body frame 1, and a material supply hole 3 is provided.
The quill 5 is fitted to the front end portion of the material supply hole 3, and a storage hole 6 for temporarily storing the sheared pipe a is formed on the side of the quill 5, and the pipe a is provided therein. A protruding rod 7 is attached, and is constantly biased backward by the elasticity of the coil spring 8 so that the pipe a can be stored.
An operating body 10 that reciprocates along the shearing surface 2 is installed on the front surface of the shearing surface 2 of the main body frame 1, and the quill 5 of the quill 5 is installed in a mounting hole 11 formed in the operating body 10. A ring-shaped cutter 12 for slidingly contacting the front surface and shearing the pipe a is fitted, and a guide hole 13 is provided on the side thereof at the same interval as the interval between the material supply hole 3 and the storage hole 6, and the actuating body 10 is , Katsura 12
Is reciprocated between the shearing position corresponding to the front surface of the quill 5 and the discharging position corresponding to the front surface of the storage hole 6 as described above.

At the tip of the mounting arm 15 protruding from the rear surface of the actuating body 10,
A mounting hole 16 is formed concentrically behind the cutter 12,
The holder 17 of the mounting hole of the fixed cored bar 19 is fitted therein, and the fixed cored bar 19 that fits tightly to the inner circumference of the pipe a has the enlarged mounting part 20 at the rear end thereof as described above. When the tip of the holder 17 is fitted in the holder 17 with a clearance, and the tip end surface is fitted in the cutter 12 so as to be slidably contactable with the front surface of the quill 5, the holder 17 is inserted into the insertion hole 21 radially provided in the mounting portion 20. The wick 5 is fixed by passing through the mounting pin 22 so as to pass through, and on the other hand, on the quill 5 side, a floating core in which an O-ring 25 is fitted on the outer circumference is inside the hollow of the pipe a. Gold 24
Are fitted tightly and the floating core metal 24
Is pressed against the fixed core metal 19 by the frictional force with the inner circumference of the pipe a.

Between the outer circumference of the mounting portion 20 of the fixed cored bar 19 and the inner circumference of the holder 17, a movable tube 27 is provided with two axially long grooves 28 which are provided on the outer circumferential surface thereof at intervals of 180 degrees. Within the above mounting pins
A pipe a that is slidably fitted in the axial direction of the fixed cored bar 19 through 22 and can be fitted into the cutter 12 by tightly fitting the outer periphery of the fixed cored bar 19 at the tip of the movable tube 27. An abutment pipe 29 having an abutting portion 30 of the same thickness is screwed, and a plug-shaped contact body 32 is screwed to the rear end of the movable pipe 27, so that the movable pipe 27 is in the shear position. At the rear of the pipe 27, an abutment roller 34 that abuts against the abutment body 32 and stops its retreat and determines the shear length of the pipe a is installed so that the position of the movable pipe 27 in the advancing / retreating direction can be adjusted. With the side of the ram mentioned above, the second
As shown in the figure, a pressing body 36 capable of pressing the abutting body 32 of the movable tube 27 at the discharge position forward is provided in a protruding manner with the advance thereof.

Next, the operation of this embodiment will be described.

As shown by the solid line in FIG. 1, when the operating body 10 is moved to the shearing position where the cutter 12 is concentric with the quill 5, when the continuous pipe a is fed forward in the material supply hole 3. The tip of the pipe a is inserted between the inner circumference of the cutter 12 and the outer circumference of the fixed cored bar 19 and hits the tip of the abutting portion 30 of the abutting tube 29, and is freely slidable through the mounting pin 22 in the long groove 28. The movable pipe 27 is pushed forward while advancing along the outer periphery of the fixed cored bar 19, and when the contact body 32 of the movable pipe 27 hits the abutting roller 34 and the movement is stopped, the pipe a stops and the quill 5 moves. Floating cored bar fitted inside the pipe a
When 24 is pressed against the fixed cored bar 19 and then the actuating body 10 moves to the discharge position shown by the chain line in the figure, the tip surface of the fixed cored bar 19 slides on the tip surface of the floating cored bar 24, 1 slides on the front surface of the quill 5, and the pipe a is sheared like a solid material. Then, as the ram advances, as shown in FIG. Is the contact body 32 of the movable tube 27.
By pushing, the movable pipe 27 and the abutting pipe 29 are advanced until the abutting portion 30 thereof enters the inside of the cutter 12, the sheared pipe a is removed from the fixed cored bar 19 and is pushed into the storage hole 6, and Then, as the ram retracts, the pressing body 36 retreats, and when the operating body 10 returns to the shearing position as shown by the solid line in FIG. 3, the protruding rod 7 in the storage hole 6 causes the cam member (not shown) to move. Thus, the pipe a that has been housed in the housing hole 6 is projected to the front surface of the guide hole 13 by passing through the guide hole 13 of the actuating body 10 and protruding to the front surface thereof against the elasticity of the coil spring 8.
It is clamped by a finger (not shown) that has been waiting, and is transferred to the front surface of the forging die as shown by the chain line in the figure by the subsequent movement of the finger.
While continuing to move inward, a continuous pipe a before shearing is sent forward in the material supply hole 3 and is fitted onto the fixed cored bar 19 through the inner circumference of the cutter 12 while retracting the movable tube 27. While moving forward, the abutment body 32 of the movable tube 27 hits the abutment roller 34 to stop the pipe a, and thereafter, by repeating the above operation, the pipe a is sheared into a certain size and sequentially. It is supplied to the front of the forging die.

[Brief description of drawings]

1 to 3 are partial sectional views for explaining the structure and operation of one embodiment of the present invention. 1: Main body frame, 2: Shear surface, 3: Material supply hole, 5: Quill,
10: Actuator, 12: Cutter, 16: Mounting hole, 17: Holder, 19: Fixed core metal, 20: Mounting part, 21: Insertion hole, 22: Mounting pin, 24: Floating core metal, 27: Movable tube, 28: long groove, 29: abutting pipe, 30: abutting part, 3
4: Impact roller, 36: Pressing body, a: Pipe

Claims (1)

[Claims] Claims: 1. A quill having a quill attached to the delivery end of a material supply hole formed through a frame, and an annular body slidably contacting the front face of the quill with an actuating member that reciprocates in front of the quill in a direction perpendicular to the axis of the quill. When the actuator is in a shearing position where the cutter and the quill correspond to each other in a concentric manner, the pipe is fed from the material supply hole to the front face of the quill, and is fitted tightly to the inner periphery of the pipe. And, while allowing the tip to slide on the front surface of the quill, while penetrating the cutter while externally fitting from the actuating body to the fixed cored bar that is inserted from the rear into the hollow of the cutter, While abutting against the stopper provided, a floating cored bar that is fitted substantially tightly to the inner circumference of the pipe in the quill is pressed against the fixed cored bar by the frictional force accompanying the delivery of the pipe, The moving body is moved from the shearing position to a side discharge position and the cutter is slid on the front surface of the quill to shear the pipe, and the pushing member provided on the actuating body is advanced at the discharge position. In the pipe shearing device configured to discharge the sheared pipe from the fixed core metal, a rear end portion of the fixed core metal is provided with a clearance in a mounting hole formed at a rear position of the cutter of the actuation body. A shaft that is inserted and fixed with a mounting pin that penetrates the mounting hole in the radial direction, and a tubular body that doubles as the stopper and the extruding member is provided on the outer peripheral surface of the fixed cored bar through the outer peripheral surface thereof. An abutment member that fits freely into the long groove in the direction through the mounting pin and moves back and forth, hits the rear end of the pipe body at the shearing position and stops the retreat, and the rear end of the pipe body at the discharge position. Push Pipe shearing device, characterized in that a moving member for advancing