JPS6034409Y2 - Tool clamping device for stems, punches, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for clamping tools such as stems and punches, and more specifically, the present invention relates to a device for clamping tools such as stems and punches, and more specifically, the present invention relates to a clamping device for tools such as stems and punches, and more specifically, it is used to clamp processing tools such as extrusion press pressure stems, die stems, and upsetter punches by using a crosshead,
This invention relates to an improvement in a device that clamps a fixed base such as a press frame using tension bolts, footers, hydraulic jacks, etc.

A device for clamping the stem of a metal extrusion press using a tension bolt, hydraulic jack, etc.
It is well known from Publication No. 666 and the like.

That is, as shown in Figs. 1 and 2, the fixing (
Installation) A holder receiving part 11 surrounding the outer peripheral surfaces of the cylindrical tool holder 2 and the cylindrical tool holder 3 is formed at the tip of the base body 1, and the tool holder 2 and the tool holder 3 are respectively fitted into the receiving part 11. In addition, a plurality of tension bolts 7 (equally spaced in the circumferential direction) are provided to fasten the tool holder 3 and the tool holder 2 to the fixed base 1, and the bolts 7 are provided between the fixed base 1 and the tool holder 3. A tension bolt 7 is provided on the base body 1 side to fix the root portion of the tool 10 indicated by a pressure stem with a tool holding fitting 5 fitted to the inner circumferential surface of the tool holder 3. The tool holder 3 is held through elastic shrinkage deformation, and the fitting surface of the tool holder 3 and the holding fitting 5 is provided with a pair of upper and lower clasps 6 that can be freely inserted and removed in a direction orthogonal to the pressing direction. The clamping force is determined by the elastic compressive force of the tension bolt 7, and the clamping force is determined by the elastic compression force of the tension bolt 7, and the clamping force is held by the bolt 6. On the other hand, in order to replace the tool 10, hydraulic pressure is applied to the hydraulic jack 4 to extend the bolt 7. This can be done by pulling out the kotsuta 6 in the state that it is in the same position.

In Fig. 1, the tension bolt 7 is a through-bolt type, and in Fig. 2, there is no bolt engagement part, so it is fixed with a deep screw, and the clamping force is determined by the bolt axial length Ll, L. ! determined by

The clamping device shown in Figures 1 and 2 is easier to attach and detach than a wedge connection that allows the tool to be inserted and removed freely, and it prevents the phenomenon that the tip of the tool tends to sag due to its own weight when attaching the tool. Although it has the basic advantage of improving alignment, since the clamping force is proportional to the length of the bolt, it is necessary to use long bolts, and it is difficult to apply it to base materials where such bolts are difficult to use. ,
As a result, it sometimes became difficult to insert and remove the cock.

The present invention utilizes the advantages based on the basic configuration of the conventional example described above, and makes it possible to avoid reducing the uncocking allowance even if the bolt length of the tension bolt is shortened. In addition to fitting an elastic compression member that can be elastically deformed (compression deformed) in the axial direction,
The present invention is characterized in that an engaging body that maintains the axial position of the member is attached to a tension bolt.

Some of the embodiments in which the present invention is applied to the pressurizing stem of a hollow material extrusion press are described with reference to FIGS. 3 to 7.
Some embodiments in which the present invention is applied to an upsetter punch will be described with reference to FIGS. 10 to 10.

In addition, in FIGS. 1 and 2, 8 is a mandrel hole,
Reference numeral 9 indicates a mandrel, and the above-mentioned members, including the members necessary for the hollow material extrusion press, are the same in basic configuration as the embodiment of the present invention, and hereinafter, in Figs. The same members as in Figure 1.2 are designated by the same reference numerals.

In the first embodiment shown in FIG. 3, a bottomed hole 12 is bored in the base body 1 of the extension of the tension bolt 7, and an elastic compression member 14 shown as a sleeve 13 is fitted over the extension of the tension bolt 7.
The axial retention of the member 14 is ensured by attaching an engaging body 15, which is a nut screwed together with a washer, to the end of the bolt.

In the embodiment shown in FIG. 3, the length 11 of the sleeve 13 is added to the length L3 of the tension bolt 7 as elastic deflection. Therefore, it is possible to provide a margin for removing the cotter 6 while ensuring the lamp force.

In the embodiment of FIG. 4, in addition to the elastic compression member 14 formed by the sleeve 13 shown in FIG.
4 are arranged in a row on the bolt, and in addition to the length 12 of the sleeve 13, the row length 13 of the disc spring 16 is added as elastic deflection, making it more effective.

In the embodiment shown in FIG. 5, a part of the sleeve 13 in the embodiment shown in FIG. 3 is fitted into the tool receiver 2, and in the embodiment shown in FIG.
is inserted into the tool holder 3.

The embodiment shown in FIG. 7 is a combination of the embodiment shown in FIG. 6 and an elastic compression member shown by a disc spring 16.

Next, the case where the present invention is applied to the upsetter shown in FIG. 8 will be explained. In FIG. 8, 24 is a bed;
Reference numeral 5 denotes tongs, both of which are pivotally connected via a horizontal shaft 26 so as to be openable and closable.

The bed 24 and the tongs 25 have an upper mold 31 and a lower mold 31A on their opposing surfaces on the opening and closing sides, respectively.

The bed 24 and the tongue 25 are connected via a pair of left and right pull rods 27, and a grip ring 27A.
It can be opened and closed by a drive device 28 via a connecting rod 27 or the like.

Reference numeral 29 denotes a slide, which is the aforementioned fixed base body, and a punch 30 is attached to the tip of the slide 29 with wedges 32 and 33.
, is detachably attached via a clamp block 34, etc., and by providing the punch 30 so as to move forward and backward in relation to the opening/closing operations of the upper and lower molds 31.31A, upsetting of pipe materials can be carried out.

In the upsetter, which is rejected in the present invention, the clamping (attachment) device for the punch, which is a tool, is made as shown in FIGS. 8 and 9.

That is, the tool receiver 2 and the tool holder 3 are fitted into the holder receiving portion 11 of the slide 29 (hereinafter referred to as the fixed base body 1) in the same manner as shown in FIG. The punch 30 (hereinafter referred to as tool 1
At that time, in FIG. 9, an elastic compression member 14 shown as a sleeve 13 is fitted onto the tension bolt 7 extending into the bottomed hole 12 of the fixed base body 1, and an engaging body 15 is attached. In Fig. 10, the sleeve 13 is inserted into the tool receiver 2, and in the embodiments shown in Figs. 9 and 10, although the axial length of the tension bolt 7 is made small, The necessary elastic deflection can be obtained.

In addition, in the illustrated example above, the elastic compression member 14 may be constructed only by disposing disc springs in a row, and the examples in FIGS. 4, 6, and 7 are applied to the examples in FIGS. 9 and 10. You can also.

Furthermore, although the illustrated example shows a pressure stem and a punch as target tools, the target tool may also be a die stem in an indirect extrusion press, a guide slide in a hydrostatic extrusion press, or a press. Regardless of the model, it is sufficient to install a press tool.

Of the above-mentioned embodiments, FIGS. 3, 4, 5,
The tool receivers 2 shown in FIGS. 9 and 10 are both fixed to the fixed base body 1 by bolts (not shown), which are well known.

Further, in each embodiment, the hydraulic jack 4 and the tension bolt 7 are arranged with their phases shifted in the circumferential direction.

In summary, the present invention forms a holder receiving part 11 surrounding the outer peripheral surface of the tool holder 3 at the tip of the fixed base body 1, fits the tool holder 3 into the holder receiving part 11, and is fastened to the fixed base body 1 with a tension bolt 7, and a hydraulic jack 4 is provided between the fixed base body 1 and the tool holder 3 to extend the tension bolt 7,
A tool holding fitting 5 fitted to the inner circumferential surface of the tool holder 3
The tool 10 is held on the fixed base body 1 side by the tool holder 3.
In the clamping device in which a removable locking member 6 is provided on the fitting surface of the tool retainer 5, the hydraulic jack 4 and the tension bolt 7 are arranged with a phase shift in the circumferential direction, and further , an elastic compression member 14 that can be elastically compressed in the axial direction is fitted around the tension bolt 7, and an engaging body 15 that maintains the axial position of the elastic compression member 14 is attached to the tension bolt 7. Therefore, it has the following advantages.

In addition to the basic effect of being able to easily and quickly replace the tool 10 while ensuring good installation accuracy, it is also possible to ensure necessary and sufficient elastic deflection even though the axial length of the tension bolt 7 is kept small. There are few restrictions on the structure of the fixed base body 1.

In addition, in the case where the sleeve 13 is used as the elastic compression member 14, the elastic deflection can be easily and easily controlled by its cross-sectional area, and in the case where the disc spring 16 is used, the elastic deflection can be easily and easily controlled by the number of arrayed springs. Adjustments can be changed freely.

Furthermore, since the hydraulic jack 4 and the tension bolt 7 are arranged so as to be out of phase with each other in the circumferential direction, so to speak, both 4 and 7 are installed independently.
The plural disc springs 16 and the sleeve 13 as the elastic compression member 14 fitted over the sleeve 13 can be freely used in combination or exclusively.

This allows the elastic deflection to be easily adjusted and changed.

Therefore, the present invention is very useful as a clamping device for tools such as extrusion press stems and upsetter punches.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing the conventional example, FIG. 3 is a cross-sectional view of the first embodiment of the present invention, and FIG. 4 is a cross-sectional view of the second embodiment of the present invention.
Fig. 5 is a sectional view of the third embodiment, Fig. 6 is a sectional view of the fourth embodiment, Fig. 7 is a sectional view of the main part of the fifth embodiment, and Fig. 8 is a sectional view to which the present invention can be applied. Cross-sectional view of a pipe upsetter, No. 9
The figure is a sectional view of the sixth embodiment of the present invention, and FIG. 10 is a sectional view of the seventh embodiment. 1... fixed base body, 3... tool holder,
4...Hydraulic jack, 5...Tool retainer, 6...Tension bolt, 7...Tension bolt, 10...Work L 13...
Sleeve, 14... Elastic compression body, 15...
...Engagement body, 16... Disc spring.

Claims (1)

[Claims for Utility Model Registration] 1. A holder receiving portion 11 surrounding the outer peripheral surface of the tool holder 3 is formed at the tip of the fixed base body 1, the tool holder 3 is fitted into the holder receiving portion 11, and the tool Fix the holder 3 to the base 1
is fastened to the tension bolt 7 via the tension bolt 7, and
A hydraulic jack 4 for extending the tension bolt 7 is provided between the fixed base body side 1 and the tool holder 3, and the tool 10 is fixed on the base body 1 with a tool holding fitting 5 fitted on the inner peripheral surface of the tool holder 3. In the clamp device, the hydraulic jack 4 and the tension bolt 7 are out of phase in the circumferential direction. are arranged in a staggered manner,
Furthermore, an elastic compression member 14 that can be elastically compressed in the axial direction is fitted around the tension bolt 7, and an engaging body 15 that maintains the axial position of the elastic compression member 14 is attached to the tension bolt 7. Tool clamping device for stems, punches, etc. 2. A tool clamping device for a stem, punch, etc. according to claim 1, wherein the elastic compression member 14 is a sleeve 13 that can be elastically compressed in the axial direction. 3. The stem, punch, etc. described in claim 1 of the utility model registration claim, wherein the elastic compression member 14 is an assembly of a plurality of disc springs 16 arranged in an axial direction on the tension bolt 7. Tool clamping device. 4. Utility model registration claim characterized in that the elastic compression member 14 is an assembly of a sleeve 13 that can be elastically compressed in the axial direction and a plurality of disc springs 16 arranged in a row in the axial direction on the tension bolt 7. A tool clamping device for stems, punches, etc. as described in scope 1.