JPH0319719A - Pipe shearing device - Google Patents

Abstract

PURPOSE:To simplify a structure by fitting a pipe body serving for a stopper and an extrusion ember as well freely movably through a fitting pin to the oblong groove in the axial direction provided through on the outer peripheral face thereof and providing an abutting member and moving member on the outer periphery of a fixed core bar. CONSTITUTION:When a pipe (a) is delivered at a shearing position, the tip of the pipe (a) abuts on the tip of the abutting part 30 of an abutting pipe 29, is advanced along the outer periphery of a fixed core bar 19 while pushing a movable pipe 27 which becomes freely slidable to an oblong groove 28 through a fitting pin 22, the pipe (a) is stopped where the movement is stopped with the abutting body 32 of the movable pipe 27 abutting on an abutting roller 34 and a floating core bar 24 is pressed to the core bar 19 in a quil 5. In succession, when a work body 10 is moved to the discharging portions shown by a chain line, a cutter 12 is slided on the front face of the quil 5 with the tip face of the core bar 19 being slided on the tip face of the core bar 24 and the pipe (a) is sheared. The movable pipe 27 is then pushed according to the advance of a ram, the abutting part 30 comes into the cutter 12, the sheared pipe (a) is removed from the core bar 19 and pushed into a storage hole 6.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention aims at shearing a pipe fed to the front surface of a quill between a cutter that slides in sliding contact with the front surface of the quill and moves back and forth while reinforcing it with a metal core. The present invention relates to a pipe shearing device designed to do this, and in particular to a pipe shearing device in which improvements have been made to the structure of the stopper that stops the delivered pipe at a certain position, and the extrusion member that pushes out the sheared pipe and discharges it from the core metal. .

Prior Art and Problems to be Solved by the Invention Conventionally, as a pipe shearing device, a quill is attached to the delivery end of a material supply hole cut through a frame, and a reciprocating motion is made in front of the quill in a direction perpendicular to the axis of the quill. An annular cutter that slides in contact with the front surface of the quill is attached to the actuating body, and when the actuating body is in the shearing position where the cutter and quill are concentrically corresponding, the pipe is fed from the material supply hole to the front side of the quill, and the pipe is cut. The cutter is passed through the cutter while being fitted substantially tightly into the inner circumference and having its tip surface slidably in contact with the front surface of the quill. At the same time, the floating core bar, which is fitted almost tightly to the inner circumference of the pipe in the quill, is pressed against the fixed core bar by the frictional force caused by the feeding of the pipe, and the operating body is sheared. The pipe is sheared by sliding the cutter in front of the quill from the quill to the lateral discharge position, and in the discharge position, the sheared pipe is moved to the fixed core by advancing the extrusion member provided on the actuating body. Devices that discharge gold are known.

Such a core metal type pipe shearing device has the advantage of being able to shear the pipe without deforming the sheared part like a solid material, but it also has the advantage of being able to shear the pipe without deforming the sheared part like a solid material.・Since it is necessary to discharge the sheared pipe by hitting it against the splinter and removing it from the fixed core, the structure of this part is not suitable for the actuating body as described in JP-A-63-169211. A stopper mounting body is arranged at the rear of the cutter, and a stopper with three protrusions with flanges at the tips formed on the outer circumferential surface is installed in the mounting hole formed concentrically with the cutter. The fixing core bar is fitted into the boulder, and is attached to a support rod protruding from the center of the tip of the stopper, and between the stopper and the holder, there is a 4-piece length that fits into the protrusion of the stopper. The extruded pipe with the groove formed thereon is inserted freely in the recessed and retracted form, and is urged backward by the spring elasticity, and the tip flange is applied to the stepped part of the holder to restrict its movement, and the extruded pipe is firmly fitted onto the fixed core bar. The tip of the pipe fed through the cutter hits the stopper and the collar of the extruded tube to stop it, and after shearing, the extruded tube is moved forward against the spring elasticity.
The process involved discharging the sheared pipe from the fixed core metal, which is extremely complicated, and there was a strong desire to simplify it.

Means for Solving the Problems The pipe shearing device of the present invention was completed against the background of the above circumstances, and the rear end of the fixed core metal is formed at a position behind the cutter of the operating body. Push it through the mounting hole with clearance and fix it with a mounting pin that passes through the mounting hole in the radial direction, and at the same time attach a tube body that serves as a stopper and an extrusion member to the outer circumference of the fixed core bar. An abutting member that is inserted into a transparent long groove in the axial direction so that it can freely move forward and backward, hits the rear end of the tube at the shearing position and stops its retreat, and a movement that pushes the rear end of the tube at the ejection position to move it forward. It has a structure in which members are provided.

Functions and Effects of the Invention The present invention has the following structure, and when the pipe is fed out at the shearing position, it is fitted onto the fixed core in the cutter and moves forward while pushing the pipe backward, and the rear end of the pipe is pushed forward. The pipe also stops when it hits the abutment member, and when the pipe is sheared by moving the operating body to the discharge position, the moving member pushes the rear end of the pipe, and the sheared pipe is pushed out by the pipe. a stopper portion that acts to cause the pipe to be discharged from the fixed core pipe and is disposed on the operating body to stop the fed-out pipe;
The extrusion part that extrudes the sheared pipe and discharges it from the fixed core metal has a pipe body that serves both as a stopper and an extrusion member, and the length of the outer circumference is fixed to the fixed core metal that is fixed to the mounting hole of the operating body with a connecting pin. By passing through the mounting pin, the actuator moves backward until it hits the abutment member provided separately from the actuating member, and is simply fitted so that it can be moved forward using the movable member provided separately, resulting in a simple structure. It has the effect of being more robust due to its simpler structure.

Examples Below, the present invention will be described as a pipe 71 for forming a pipe by pressure forming.
An embodiment applied to a supply portion of a raw material pipe will be described based on the accompanying drawings.

In the figure, 1 is a main body frame on which heading dies are arranged in parallel, and between it and a punch attached to a retracting ram in front of the main frame, no heading forming is performed on the vipe a,
A material feeding hole 3 through which a continuous pipe a is fed from the rear side to the front side is provided in a shearing surface 2 provided at one end of the main body frame 1, and a quill 5 is fitted into the front end of this material feeding hole 3. At the same time, a storage hole 6 is formed on the side thereof to temporarily store the sheared pipe a, and a protruding rod 7 is fitted into the hole so that the pipe a does not protrude and the elasticity of the coil spring 8 is always maintained. The pipe a is urged backward so that the pipe a can be stored, and an actuating body 10 is installed in front of the shearing surface 2 of the main body frame I, which reciprocates along the shearing surface 2,
An annular cutter 2 for shearing the pipe a by slidingly contacting the front surface 7 of the quill 5 is fitted into the attachment hole II formed in the operating body 10, and a material supply hole 3 is fitted on the side thereof. Guide holes l3 are transparently provided at the same spacing as the spacing between the housing holes 6, and the actuating body 10 is placed at a shearing position where the cutter 2 corresponds to the front surface of the quill 5, and at a discharge position where the cutter 2 corresponds to the front surface of the housing hole 6. It is designed to reciprocate as described above between the two.

At the tip of the mounting arm l5 protruding from the rear surface of the operating body IO, a mounting hole 16 is formed concentrically behind the cutter 2, into which a holder 7 for mounting the fixed core bar 19 is fitted. The fixed core bar 19, which tightly fits into the inner periphery of the pipe a, is fitted with the mounting wJ20, which has an enlarged diameter at its rear end, into the holder 7 with a clearance, so that the tip surface is quilled. The mounting pin 22 is inserted into the cutter 2 so as to pass through the holder 7 through the insertion hole 2I provided in the mounting portion 20 in the radial direction when the cutter 2 is fitted in the cutter 2 so as to be able to make sliding contact with the front surface of the cutter 5.
On the other hand, on the above-mentioned quill 5 side, a floating core bar 24 with an O-ring 25 fitted on the outer periphery is tightly fitted into the hollow of the pipe a. When the pipe a is fed out, the floating core metal 24 is pressed against the fixed core metal 19 by the frictional force with the inner periphery of the pipe a.

Between the outer periphery of the attachment part 20 of the fixed core bar 19 and the inner periphery of the holder 17, there are two movable tubes 27 extending in the axial direction, which are transparently provided at an interval of 180 degrees on the outer circumferential surface of the movable tube 27. The cutter l2 is inserted into the movable tube 27 through the mounting pin 22 and fitted into the sliding thread in the axial direction of the fixed core bar 19, and is fitted tightly onto the outer periphery of the fixed core bar 19 at the tip of the movable tube 27. An abutment pipe 2 formed with an abutment part 30 having the same wall thickness as the pipe a, which can be fitted into the abutment pipe 2.
9 is screwed to the rear end of the movable tube 27, and a plug-shaped contact body 32 is screwed to the rear end of the movable tube 27.
7, it hits the abutting body 32 and stops its retreat.
The abutment roller 34 that determines the shearing length of the pipe a,
The movable tube 27 is installed so as to be adjustable in its forward and backward position, and as it moves forward, the movable tube 27 in the ejection position comes into contact with the side surface of the ram (not shown in FIG. 2). A suppressing body 36 that can suppress the body 32 forward is provided in a protruding manner.

Next, the operation of this embodiment will be explained.

As shown by the solid line in FIG. 1, when the operating body IO is moving to the shearing position where the cutter l2 is concentric with the quill 5, continuous pipe disturbances are sent forward inside the material supply hole 3. , the tip of the pipe a enters between the inner periphery of the cutter l2 and the outer periphery of the fixed core metal 19, hits the tip of the abutment part 30 of the abutment tube 29, and is slid freely through the long groove 28 through the mounting pin 22. While pushing the movable tube 27, the movable tube 27 is moved forward while being pushed into the outer periphery of the fixed core bar 19, and the abutting body 3 of the movable tube 27 is moved forward.
2 hits the abutment roller 34 and stops moving, the pipe a stops, and the floating core bar 24 fitted into the pipe a in the quill 5 is pressed against the fixed core bar 19, and then the operating body 10 moves to the ejection position shown by the chain line in the figure, the tip surface of the fixed core bar 19 touches the floating core bar 2.
The cutter 12 slides on the front surface of the quill 5 while sliding on the tip surface of the quill 5, and the pipe a is cut in front like a medium-pointed material.
Next, as the ram moves forward, as shown in FIG. Totoro 30
The pipe a is moved forward until it enters the cutter 12, and the sheared pipe a is removed from the fixed core bar 19 and pushed into the storage hole 6. Then, as the ram retreats, the immediate pressure body 36 retreats, and the pipe a is moved forward until it enters the cutter 12. As shown by the solid line in FIG. 3, when the actuating body IO moves back to the shearing position, the protruding rod 7 in the storage hole 6 guides the actuating body 10 against the elastic force J of the coil spring 8 by a cam member (not shown). The pipe a, which had been protruding through the hole 13 to the front surface thereof and housed in the storage hole 6, was protruded from the front surface of the guide hole 13 and was held by waiting fingers (not shown), and as the fingers continued to move, the pipe a As shown by the chain line, the material is transferred to the front of the heading die, and during this time, the protruding rod 7 moves back into the storage hole 6, and the continuous pipe a before shearing is sent forward through the material supply hole 3. ,
The movable tube 27 is not moved backward, but moves forward through the inner periphery of the cutter I2 while resting on the fixed core metal 19, and the abutment body 32 of the movable tube 27 hits the abutting roller 34, so that the pipe a stops. From then on, by repeating the above operations,
The pipe a is sheared into pieces of a certain size and sequentially supplied to the front of the heading die.

[Brief explanation of the drawing]

1 to 3 are perspective views for explaining the structure and operation of an embodiment of the present invention. I. Main body flange 24 Shear surface 3: Extended supply hole 5
: Quill 10, operating body l2, cutter 16: mounting hole
]7: Holder 19: Fixed core bar 20 = Mounting part 2 ■: Insertion hole 22: Mounting pin 24/floating core bar 27: Movable tube
28: Length 7llt29/Butt pipe 30: Butt part 34:
Abutting roller 36: Pressing body a/pipe

Claims (1)

[Scope of Claims] A quill is attached to the delivery end of a material supply hole provided through the frame, and the front surface of the quill is in sliding contact with an actuating body that reciprocates in a direction perpendicular to the axis of the quill in front of the quill. An annular cutter is attached, and when the actuating body is in a shearing position corresponding to concentricity of the cutter and the quill, the pipe is delivered from the material supply hole to the front surface of the quill, and the pipe is substantially tightly attached to the inner circumference of the pipe. mated, and
The cutter is passed through a fixed core metal fitted from the rear into the hollow of the cutter from the working body so that the tip surface is in sliding contact with the front surface of the quill, and the cutter is inserted into a stopper provided on the working body. At the same time, the floating mandrel, which is fitted almost tightly to the inner periphery of the pipe in the quill, is pressed against the fixed mandrel by the frictional force accompanying the feeding of the pipe, and the actuating body is moved from the shearing position to the side. The cutter is moved to the discharge position and slid on the front surface of the quill to shear the pipe, and at the discharge position, the extrusion member provided on the actuating body is advanced to remove the sheared pipe from the fixed core. In a pipe shearing device configured to discharge metal, the rear end portion of the fixed core bar is inserted into a mounting hole formed at a rear position of the cutter of the operating body with a clearance, and the diameter of the mounting hole is adjusted. At the same time, a tube body serving as the stopper and the extrusion member is attached to the outer periphery of the fixed core metal, and the attachment pin is inserted through a long groove in the axial direction formed transparently on the outer circumferential surface of the tube body, and the tube body is moved back and forth. The present invention is characterized by providing an abutment member that is freely fitted and hits the rear end of the tubular body in the shearing position to stop its retreat, and a moving member that pushes the rear end of the tubular body in the ejection position to move it forward. pipe shearing device