JPH11342417A - Extrusion member starting point location device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extrusion member starting point location device which automatically locates the start of an extrusion member and makes an unmanned extrusion pressing possible. SOLUTION: This device comprises a guide tube 1 which is arranged inside a platen 9 of an extrusion press P and guides the extrusion member being pushed out immediately after the dies are exchanged, a guide means 8 which slidably supports the guide tube 1, guide tube sliding means 2, 3 which slide the guide tube 1 synchronizing with a push out velocity of the extrusion member, and a line sensor 6 installed at a discharge port of the platen 9 to detect a tip end of the extrusion member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cueing extruded material extruded immediately after a die change.

[0002]

2. Description of the Related Art Conventionally, at the start of pushing of an extrusion press immediately after a die change, a person holds a tip of an extruded material using a special tool and guides the extruded material to a platen outlet so that the extruded material is not clogged in the platen. I was

[0003]

As described above, in the prior art, since the cueing operation immediately after the die exchange was performed manually, this was a bottleneck in achieving full automation of the extrusion press. In addition, when the capacity of the extrusion press increases, the cross section of the extruded material increases, so that there is a limit to the cueing operation by human power. It is also quite hard work.

On the other hand, a fixed guide may be provided on the end platen surface and thereafter. However, since equipment such as a cutting machine and a puller is densely provided near the end platen, there is always space for installing the fixed guide. There is no. The present invention
An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an extruded material cueing apparatus which does not have the above-mentioned disadvantages.

[0005]

According to the present invention, an extruded material cueing apparatus capable of achieving the above-mentioned object comprises: a) an extruded material which is disposed in a platen of an extrusion press and which is extruded immediately after a die change; A guide tube for guiding to an outlet, b) guide means for slidably supporting the guide tube, c) guide tube sliding means for sliding the guide tube in synchronization with the extrusion speed of the extruded material, d) at an outlet of the platen And a line sensor for detecting the tip of the extruded material.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a platen portion of an extrusion press, in which a guide tube 1 is provided in a hole 14 in a longitudinal direction (front-back direction) provided on a platen 9 of an extrusion press P.

As shown in FIG. 2, the guide tube 1 is
A pair of left and right linear guides 7 is provided on the outside thereof, and each of the linear guides 7 is slidably supported by two linear guide rails 8 attached to the inner surface of the hole 14, respectively. As shown in FIG. 1, the linear guide rail 8 is provided in the longitudinal direction (the front-rear direction) of the extrusion press P, and its distal end projects forward by a predetermined length from the end platen surface 10. I have.

The guide tube 1 is provided with one rack 2 in the longitudinal direction, and a pinion 3 is engaged with the rack 2. Therefore, in FIG. 1, when the pinion 3 rotates clockwise, the guide tube 1 moves forward along the linear guide rail 8, and when the pinion 3 rotates counterclockwise, the guide tube 1 moves along the linear guide rail 8. fall back.

The pinion 3 meshes with a gear 15 mounted on the drive shaft 4, and the drive shaft 4 is driven by a servomotor 5 which is synchronized with the extrusion speed of an extruded material (not shown). I have. Further, on the front surface of the platen 9, that is, on the front surface of the end platen surface 10, two sets of photoelectric sensors 6 are installed so as to apparently cross each other.

In the drawings, reference numeral 11 denotes a pressure ring, 12 denotes a bolster, and 13 denotes a die ring. Next, the operation of the cueing device will be described. As shown in FIG. 1, the guide tube 1 is
In a state in which the extruded material is completely returned into the die 4, the extruded material (not shown) is extruded from the dice (not shown) immediately after the die replacement.

The extruded material extruded from the die advances in the guide tube 1, and when its tip comes out of the front end of the guide tube 1, it is detected by the photoelectric sensor 6, and its signal is not shown. It is transmitted to the controller. When the servo motor 5 is driven by the controller, the pinion 3 rotates clockwise via the gear 15 and the guide tube 1 moves forward in the direction of arrow a at a predetermined speed. The advance speed of the guide tube 1 is adjusted in advance to be the same as the speed of the extruded material.

That is, in general, the speed of the extruded material substantially coincides with the product of the ram speed of the extrusion press P and the extrusion ratio, and therefore, the servo motor is determined based on the product of the ram speed of the extrusion press P and the extrusion ratio. The speed of 5 can be controlled. When the guide tube 1 reaches the exit end, as indicated by the two-dot chain line, the extrusion of the extruded material is temporarily stopped, while when the guide tube 1 is retracted to the initial position, only the tip of the extruded material enters the platen outlet 10. Will be left.

Thereafter, the tip of the extruded material is cut into a predetermined length and lifted by a lifter (not shown).
Then, it is chucked by a puller and extrusion is started.
In the above description, the case where a linear guide is used as a method of guiding the guide tube has been described. However, for example, a similar effect can be obtained by a roller guide method.

Although the guide tube is driven by the rack and the pinion, the guide tube can be driven by, for example, a wire or a sheave. Further, although a servomotor is used for driving the guide tube, any combination of an encoder and an inverter motor, an encoder and a hydraulic or pneumatic cylinder, or the like can be used as long as it has a speed tuning function.

Although the photoelectric sensor is used to detect the tip of the extruded material, if a leak can be detected, for example,
Other sensors, such as limit switches and proximity switches, can also be used.

[0016]

As described above, according to the present invention, the cueing of the extruded material can be automatically performed. By automating the extruded material cueing operation, the extrusion press can be completely unmanned, and the number of operators can be reduced by one.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an extruded material cueing device according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Guide tube 2, 3 Guide tube sliding means 6 Line sensor 8 Guide means 9 Platen 10 Exit of extrusion press P Extrusion press

Claims (1)

[Claims] A) disposed in a platen of an extrusion press;
A guide tube for guiding the extruded material extruded immediately after the die exchange to the outlet of the extrusion press; b) guide means for slidably supporting the guide tube; c) sliding the guide tube in synchronization with the extrusion speed of the extruded material. An extruded material cueing device, comprising: a guide tube sliding means; and d) a line sensor installed at an outlet of the platen for detecting a tip of the extruded material.