JPS60234718A - Device for drawing pipe - Google Patents

Abstract

PURPOSE:To improve the safeness of working and production efficiency by inserting a pipe into a mandrel bar outside a pipe drawing line and then drawing a pipe with feeding onto a pipe drawing line. CONSTITUTION:A mandrel bar 4 is set to the prescribed position with a transferring device 18 from a feeding table 17 and also a pipe 2 on a table 19 is moved with its being held between by a pinch roll 20 and inserted into the mandrel bar 4 outside the drawing line. The mandrel bar 4 in which the pipe 2 is inserted is set on a guiding device 3 and the tip of the pipe 2 is engaged with the holding tool of a drawing carriage 26. By a plug and die stand 1 successively the pipe 2 is formed to a product. Due to the insertion of the pipe 2 being performed outside the drawing line, safeness is elevated and production efficiency is improved because of the next pipe 2 being able to be inserted during drawing.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a pipe drawing device that improves production efficiency and safety by inserting a pipe into a mandrel bar outside the pipe drawing line. It is something.

[Prior Art] In conventional pipe drawing equipment, a mandrel bar is fixed in a pipe drawing line, and a worker must manually insert a pipe material into the fixed mandrel bar. There wasn't. For this reason, there was a problem that the work was dangerous and the work efficiency was low.

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention uses the mandrel bar in circulation without being fixed to the pipe drawing line, and inserts the material pipe into the mandrel bar outside the pipe drawing line. The purpose of this invention is to provide a pipe pulling device that improves safety and production efficiency.

[Means for Solving the Problems 1] The present invention provides a device for inserting a pipe into a mandrel bar outside a pipe drawing line, a device for feeding the mandrel bar into which the pipe is inserted into the pipe drawing line, and a mandrel bar from which the pipe has been drawn. - a device for taking out the pipe to the outside of the pipe drawing line.

[Operation] In the present invention, a mandrel with a pipe inserted outside the pipe drawing line is fed into the line and drawn out, and the mandrel bar with the pipe pulled out is carried out of the see-in.

[Example] Embodiments of the present invention will be described below with reference to the accompanying drawings.

A guide device 3 is disposed on the upstream side of the die stand 1 so that the pipe 2 can be fed into the die stand 1, and a mandrel end is provided at the upstream end of the guide device 3 to prevent the mandrel bar 4 from moving when the pipe is pulled out. 5 are arranged.

The guide device 3 includes a lever 7 which can be swung back and forth via a rod 27 by a hydraulic cylinder 6, and the lever 1.
It is equipped with a roller 8 for guiding the pipe 2, a jack 9 whose height can be adjusted by adjusting the angle of the lever 7, and the like.

Details of the mandrel end 5 are shown in FIG. 3, and a hollow body 12 is screwed into the threaded portion of a nut 11 rotatably supported within a frame 10.
A shaft 14 having an engaging member 13 fixed to its tip which engages with the protrusion 22 at the rear end of the mandrel bar 4 is fitted so as to be able to slide in the axial direction, and is fitted into the hollow part of the hollow body 12 so as to surround the shaft 14. The shaft 14 is always urged toward the mandrel bar 4 by the fitted spring 15. Further, a gear 16 is fixed to the outer periphery of the nut 11, and is engaged with a pinion rotated by a suitable drive device, so that by rotating the nut 11 via the gear 16, the hollow body 12 can be moved in the axial direction. It has become.

An example of the guide device @3 includes a transfer device 18 that transfers the mandrel bar 4 on the mandrel bar supply table 17 to the pipe insertion position, and a mandrel bar that sets the pipe 2 on the pipe placement tilt pull 19 to the pipe insertion position. Vinci roll device 20 for insertion into -4, mandrel bar -4
A positioning device 21 moves the mandrel bar 4 into which the positioned pipe 2 is inserted in a direction perpendicular to the pipe pulling direction, sets the mandrel bar 4 into which the pipe 2 is inserted onto the transport device 3, and moves the mandrel bar 4 into which the pipe 2 is inserted into the mandrel bar 4. -4 A walking beam type transfer device 23 for engaging the protrusion 22 at the rear end with the engagement member 13 of the mandrel end 5 is provided. A mandrel bar discharge table 24 is disposed on the other side of the guide device 3, and the mandrel bar 4 with the pipe 2 pulled out is transferred from the guide device 3 to the mandrel bar discharge table 24 by a walking beam type transfer device 25. I'm starting to get it.

In the figure, reference numeral 26 denotes a draw carriage that grabs the tip of the pipe and pulls out the pipe by moving while being pulled by a chain.

When pulling out a pipe, the mandrel bar 4 is transferred from the mandrel bar supply table 11 by the transfer device 18 and set at a predetermined position, and its rear end is positioned by the positioning device 21.
The upper pipe 2 is held by the pinch roll device f20 and moved in the opposite direction to the pipe drawing direction, and the pipe 2 is inserted into the mandrel bar 4 outside the pipe drawing line.

Next, the mandrel bar 4 into which the pipe 2 has been inserted by the transfer device 23 is transferred together with the pipe 2 to the guide device 3 side, and the protrusion 22 at the rear end of the mandrel bar 4 is connected to the engagement member 13 of the mandrel end 5. engage. Note that when setting the mandrel bar 4 on the guide device 3, the nut 11 is rotated via the gear 16, the hollow body 12 moves forward or backward, and the engaging member 13 is moved to the protrusion of the mandrel bar 4. The position of the roller 8 of the guide device 3 is adjusted so that the portion 22 can be smoothly engaged, and the roller 8 of the guide device 3 is moved by the mandrel bar by the transfer device 23.
4 and the fluid pressure cylinder 6 so as not to hinder the transfer of the pipe 2.
It is located at the lowest position.

When the mandrel bar 4 and the pipe 2 are set on the guide device 3, the hydraulic cylinder 6 pulls the rod 27, which rotates the lever 7 and raises the roller 8.
The pipe 2 is supported by. The upper end position of the roller 8 needs to be adjusted according to the diameter of the pipe 2 to be pulled out, but this is done by adjusting the position of the shaft tip of the jack 9 so that the side of the lever 1 on the most upstream side is at the tip of the jack 9 shaft. This is done by changing the upright angle of the lever 1 when it makes contact.

Once the mandrel bar 4 and pipe 2 are set on the guide device 3 in a predetermined state, tighten the nut 11 of the mandrel end 5.
The hollow body 12 is advanced by rotating, the tip of the pipe 2 is projected forward from the die of the die stand 1, the tip of the pipe 2 is grabbed by the gripper of the draw carriage 26, and the draw carriage 26 is hooked on the chain. advance. Therefore, the pipe 2 is formed into a predetermined size by the plug at the tip of the mandrel bar 4 and the die of the die stand 1 to become a product pipe. When the pipe 2 is completely removed from the mandrel bar 4, the shock is generated by the spring 15 of the mandrel end 5.
absorbed by.

When the pipe 2 is pulled out from the mandrel bar 4, it is removed from the mandrel bar 4 by a walking beam type transfer device @25.
The protrusion 22 at the rear end is removed from the engagement member 13 and conveyed to the mandrel bar discharge table 24. mandrel bar
The mandrel bar 4 taken out to the discharge table 24 is returned to the mandrel bar supply table 17 by appropriate means.

In addition, in the embodiments of the present invention, the case where the position adjustment of the engaging member of the mandrel end is performed using screws has been explained, but it is also possible to adjust the position using a fluid pressure cylinder. Of course, various changes may be made within the scope.

[Effects of the Invention] According to the pipe drawing device of the present invention, the pipe can be inserted into the mandrel bar outside the pipe drawing line, so work safety is improved, and during drawing, the pipe to be drawn next can be inserted into the mandrel bar outside the pipe drawing line. Since the mandrel bar can be inserted, production efficiency can be improved, and since the mandrel bar is circulated, automation can be facilitated, and various other excellent effects can be achieved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a detailed diagram of a mandrel end used in the present invention. In the figure, 1 is a die stand, 2 is a pipe, 3 is a guide device, 4
is the mandrel bar - 15 is the mandrel end, 18, 23
．． 25 is a transfer device, and 26 is a draw carriage. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) In a pipe drawing device that grips and draws a pipe inserted into a mandrel bar with a draw carriage, and forms the pipe using a plug at the tip of the mandrel bar and a die provided on a die stand, the pipe is inserted into the mandrel bar outside the pipe drawing line. A device for inserting a pipe into the pipe, a device for feeding a mandrel bar into which a pipe has been inserted into a pipe drawing line, and a device for taking out the mandrel bar from which the pipe has been pulled out from the pipe drawing line.