JPH0239640Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is used to hold a punch in a punch press device, and the punch press device has a central porous structure found on the cut end surface of a bloom produced by continuous casting. In order to prevent oxidation from progressing from the porous part to the porous part within the bloom, the pores in the porous part are closed at both end faces by pressing and indenting the bloom from both end faces with a hydraulically driven punch. It is something.

[Conventional technology]

A conventional punch press apparatus was previously proposed by the applicant as a method and apparatus for internal oxidation prevention treatment of cut ends of continuous casting materials (Japanese Patent Application No. 59-277978). It is as shown in Figure 3, with support stand 1
A bloom 2 cut from a continuous cast material is placed on top of the first bloom 2, which is movable in the longitudinal direction, and is fixed to a tool stand 4.
A tool 3 (fixed side punch) and a second tool 7 (driving side punch) opposing this with the bloom 2 in between are provided, and the second tool 7 is driven by a hydraulic cylinder 8 with an output of about 300 tons to form the first tool. The center porous portions of both cut end faces of the bloom are indented with the tips of the third and second tools 7, respectively. This closes the pores of the porous portion and provides a good internal oxidation prevention effect.

The tools 3 and 7 (hereinafter referred to as punches) used in this punch press device were as shown in FIG. Since the punches 3 and 7 are the same, one of the punches 3 will be explained: a tip 3a that is pushed into the end surface of the bloom 2, an enlarged portion 3b that is enlarged in steps following the tip,
It consists of a small diameter shank portion 3c following this. The holding part 9 of the punch 3 has a circular hole 9a that fits into the shank part 3c, and a pin hole 9c is provided through the holding part 9 and the shank part 3c inserted into the circular hole 9a.
This is a configuration in which a retaining pin 10 is inserted in 3d.

[Problem that the invention attempts to solve]

Conventional punch holding devices have a problem in that they often break due to cracking as shown by dotted line B in FIG. 2 due to use. This is thought to be because the enlarged portion 3b is subjected to shearing action due to the presence of the circular hole 9a. Further, there is a problem that burrs occur at the entrance portion 12 of the pin hole 3d in the figure, making it difficult to attach and detach the retaining pin 10 and the shank portion 3c. In addition, the process in which the punch press equipment is used is immediately after the continuous casting material cast by the continuous casting equipment is gas cut into the desired length, so the blooms are sent one after another to the punch press equipment. Because I'm coming
If it takes a long time to replace the punch due to breakage, etc., not only will the indentation treatment be delayed and cause a problem on the production line, but also the problem of oxidation progressing from the porous part of the cut end to the inside if bloom occurs without the punch being treated. arise.

[Means for solving problems]

The means of this invention is that, in the punch holding structure of the punch press device, the punch has a tip portion shaped to correspond to the recessed shape to be indented into the central porous portion of the end face of the bloom, and an intermediate portion following the tip portion. , the punch holding part has a recess provided on the distal end surface of the main body into which the base part is fitted, and the base part fitted into the recess. The punch member includes a presser member that abuts the step, and a locking means that locks the presser member to the punch holder main body while the presser member is in contact with the step.

[Effect]

The base part of the punch has a larger diameter than the middle part, and since this base part is fully supported in the recess, there is no part that is subjected to shearing action, and the middle part and base part are not damaged. . Since the presser member that holds the base part in the same direction as the load direction of the punch is used to hold the punch, the load from the punch press does not act on the presser member and its locking part during the punch press operation, so the punch can be removed and removed. It won't be difficult at all.

〔Example〕

FIG. 1 shows one embodiment of this invention. In the figure, 11 is a punch and 12 is a punch holding portion.

The punch 11 has a tip portion 13, an intermediate portion 14,
It consists of a base part 15. The tip portion 13 has a truncated conical shape, the width of which is determined in accordance with the width of the porous portion found at the center of both end surfaces of the bloom to be treated, and which tapers toward the tip. Middle part 14
is formed into an enlarged large-diameter portion with a step 16 following the tip portion 13, and has a slightly enlarged taper toward the rear for easy attachment and detachment. The base portion 15 is
Continuing from the intermediate portion 14, a step 17 is formed in a further enlarged large diameter portion, and has a flange shape.
A flat rear end surface 18 is formed.

The punch holding part 12 has a recess 19 and a presser member 2.
0 and a locking means 21. The recess 19 is large enough to fit the base portion 15 of the punch into the tip end surface 22a of the punch holding portion main body 22.
The bottom surface is flat. Pressing member 20
is annular with a circular hole slightly larger than the maximum outer diameter of the intermediate portion 14, and has a thickness smaller than the axial length of the intermediate portion 14 as shown in FIG. and the lower part of the locking means 2
1 is provided. The locking means 21 is connected to the holding part main body 22 in a hinged manner at the lower part with a pivot 24, with the holding member 21 positioned on the outer periphery of the intermediate part 14 of the punch and in contact with the step 17 of the base part 15. It can be opened and closed up and down, and can be connected to the holding part main body 22 by a removable pin 25 at the upper part of the holding member 20. To remove the punch 11 from the locked state shown, pin 25
, and then rotate the presser member 20 downward about the pivot 24.

By employing the structure of this embodiment, the punch replacement time was shortened from 5 minutes to 1 minute compared to that shown in FIG. Also, the punch was no longer damaged.

In the above embodiment, the locking means are provided on the upper and lower sides of the annular holding member, but they may be provided on the left and right sides, and the shape of the holding member does not necessarily have to be annular.

[Effect of idea]

According to this invention, in a punch press device, it is possible to provide a punch and a punch holding structure in which the punch and the punch holding part are hardly damaged by use, and there is no possibility that the punch will be difficult to attach and detach when replacing the punch. Therefore, the indentation treatment at both ends of the bloom is performed smoothly, and internal oxidation prevention is performed satisfactorily.

[Brief explanation of the drawing]

Fig. 1 shows one embodiment of this invention, a is a partial longitudinal side view, b is a front view, Fig. 2 is a partial longitudinal side view showing a conventional punch and punch holder, and Fig. 3 is a diagram of a punch press device. FIG. 2 is a side view showing a schematic configuration. DESCRIPTION OF SYMBOLS 11... Punch, 12... Holding part, 13... Tip part, 14... Intermediate part, 15... Base part, 17...
... Step, 19 ... Recess, 20 ... Pressing member, 21 ...
...Locking means, 22... Holding part main body.

Claims (1)

[Scope of utility model registration request] A punch is held in the punch holding parts provided opposite each other on both sides, and one punch holding part is hydraulically driven toward the other punch holding part to form a hole in the center of both end faces of the bloom that cuts the continuous cast material. In a punch holding structure of a punch press device for indenting each mass part with the punch, the punch has a tip portion having a shape corresponding to the indentation shape, an intermediate portion following the tip portion, and a stepped portion from the intermediate portion. and a base part enlarged to form an enlarged base part, and the punch holding part corresponds to a recess provided on the front end surface of the main body into which the base part fits, and the step of the base part fitted into the recess. A punch holding structure for a punch press device, comprising a presser member in contact with the stage, and a locking means for locking the presser member on the punch holding portion main body while the presser member is in contact with the step.