JP2001079696A - Press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press machine capable of attaining precise forming by preventing deformation of the press main body and capable to reducing noise by damping vibration in forming. SOLUTION: In a press machine in which a slide is elevated or lowered by a slide drive mechanism arranged in a crown of a press main body 1 upper part and a work is formed between an upper die mounted on the lower face of the slide and a lower die mounted on a bed or a bolster, a deformation prevention member 5 divided into sections is horizontally arranged between side frames 1a arranged at the left/right sides of the press main body, the end part of the divided side frames 1a are fixed to the side frames 1a, and the deformation prevention member 5 divided into sections is fitted in the horizontal direction with a prescribed clearance 8. The deformation prevention member 5 prevents the deformation in the horizontal direction of the side frames 1a, thereby making precise forming possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine in which a deformation preventing member is suspended between left and right side frames constituting a press body to prevent deformation of the press body.

[0002]

2. Description of the Related Art In a conventional press machine, a slide drive mechanism is provided at an upper portion of a press body, and the slide drive mechanism moves the slide up and down, thereby forming a die (upper die) attached to a lower surface of the slide. ) And a mold (lower mold) installed on a bed or a bolster.

[0003] Also, relatively small press machines include a C-type press in which a C-type frame is arranged on both sides of a press body, and a straight side press in which side frames are arranged on both sides of the press body. In any press machine, if the press body is deformed by the molding load during molding, high-precision molding cannot be performed, or the mold will wear out early and the mold life will be shortened. Measures have been taken. For example, JP-A-10-34397
In the publication, a vertical tie rod is provided on the front surface of a C-type frame constituting the press body to prevent the opening of the C-type frame due to a forming load, and at the same time, the left and right C-type frames are connected by a horizontal tie rod, C by molding load
There has been proposed a press machine in which a mold frame is prevented from being deformed in a horizontal direction.

[0004]

However, when the left and right frames are connected by horizontal tie rods as in the press machine disclosed in the above publication, there is an effect of preventing deformation of the left and right frames.
At the same time, there are the following problems.

That is, the press body is provided with a slide gib for guiding the vertical movement of the slide, and an appropriate gap is provided between the slide and the slide gib for the slide to move up and down smoothly. However, in the press machine disclosed in the above-mentioned publication, a horizontal tie rod is suspended between left and right frames, and both ends of the horizontal tie rod are fixed to the left and right frames by fixing means such as bolts or welding. When fixing the horizontal tie rod to the frame,
The gap between the slide and the slide gib fluctuates, making it impossible to maintain an appropriate gap.As a result, smooth vertical movement of the slide is hindered, and high-precision molding cannot be performed. There are inconveniences such as seizure of the sliding contact portion and abnormal wear, making the operation impossible, and shortening the life of the liner provided between the slide and the slide early.

Further, since the left and right frames are fixed by horizontal tie rods, the vibration generated in the left and right frames propagates to the opposite frame to increase the vibration, thereby causing a problem such as causing noise.

[0007] The present invention has been made in order to improve such conventional problems, and is intended to prevent deformation of the press body,
It is an object of the present invention to provide a press machine that enables high-precision molding and attenuates vibration during molding to reduce noise.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, the slide is moved up and down by a slide drive mechanism provided in a crown at an upper portion of a press body, and a lower surface of the slide is provided. In a press machine for forming a work between an upper mold attached to a lower mold and a lower mold installed on a bed or a bolster, a plurality of deformations are formed between side frames arranged on the left and right sides of the press body. The prevention member is suspended horizontally, and the side frame side end of the plurality of divided deformation prevention members is fixed to the side frame, and a predetermined gap is horizontally provided between the plurality of divided deformation prevention members. They are fitted.

With the above structure, the deformation preventing member bridged between the left and right side frames suppresses the horizontal deformation of the left and right side frames due to the molding load applied to the press body at the time of molding. Is possible, and the gap between the slide and the slide gib does not fluctuate.
Seizure and abnormal wear can be prevented from occurring in the sliding contact portion between the slide and the slide gib, whereby the life of the liner provided between the slide and the slide gib can be improved.

[0010] Further, since the vibration generated during molding can be attenuated by the friction of the fitting portions of the plurality of deformation preventing members, noise due to the vibration can be reduced.

Further, since the deformation preventing member suppresses the amount of horizontal deformation generated in the left and right side frames due to the eccentric load generated during molding, it is possible to prevent the parallelism between the lower surface of the slide and the upper surface of the bed or the upper surface of the bolster from decreasing. It is possible to do this for molding where eccentric load occurs
High-precision processing becomes possible.

In order to achieve the above object, according to the present invention, the horizontal gap between the plurality of divided deformation preventing members is adjusted by a fixing tool such as a shim or a bolt.

According to the above configuration, the horizontal gap of the plurality of deformation preventing members can be easily adjusted in a short time, and the gap of the press body fluctuates due to the deformation of the press body during long-term use. Even so, by adjusting the shim or the fixing tool, it is possible to easily adjust the gap to an appropriate value.

According to a third aspect of the present invention, a friction generating member made of an elastic material is provided at a sliding contact portion of a plurality of deformation preventing members.

According to the above configuration, since the friction of the sliding portion of the plurality of divided deformation preventing members is greatly increased by the friction generating member, a large vibration generated at the time of breakthrough can be efficiently attenuated. Noise can be greatly reduced.

According to a fourth aspect of the present invention, an upper die mounted on a lower surface of a slide is formed by moving a slide up and down by a slide drive mechanism provided in a crown at an upper portion of a press body. Alternatively, in a press machine for forming a work between lower dies installed on a bolster, a plurality of divided deformation preventing members are laid horizontally between side frames arranged on the left and right sides of the press body, and a plurality of The side end of the divided deformation preventing member on the side frame side is fixed to the side frame, and the plurality of divided deformation preventing members are fitted with a predetermined gap in the horizontal direction, and are divided into a plurality of parts. The deformation preventing members are connected by a joint.

[0017] With the above structure, the deformation preventing member bridged between the left and right side frames suppresses the horizontal deformation of the left and right side frames due to the molding load applied to the press body at the time of molding. Is possible, and the gap between the slide and the slide gib does not fluctuate.
Seizure and abnormal wear can be prevented from occurring in the sliding contact portion between the slide and the slide gib, whereby the life of the liner provided between the slide and the slide gib can be improved.

Further, vibration generated during molding can be attenuated by friction between the plurality of divided deformation preventing members and the fitting portion of the joint, so that noise due to the vibration can be reduced and the joint is divided into a plurality of parts by the joint. Because the connection part of the deformation prevention member is strengthened and the rigidity of the deformation prevention member increases,
The deformation of the press body can be prevented even with a larger forming load.

Furthermore, since the deformation preventing member suppresses the amount of horizontal deformation generated in the left and right side frames due to the eccentric load generated during molding, it is possible to prevent the parallelism between the lower surface of the slide and the upper surface of the bed or the bolster from being reduced. It is possible to do this for molding where eccentric load occurs
High-precision processing becomes possible.

In order to achieve the above object, according to the fifth aspect of the present invention, a horizontal gap between the plurality of divided deformation preventing members is adjusted by a fixing tool such as a shim or a bolt.

With the above structure, the horizontal gap of the plurality of deformation preventing members can be easily adjusted in a short time, and the gap of the press body fluctuates due to the deformation of the press body during long-term use. Even so, by adjusting the shim or the fixing tool, it is possible to easily adjust the gap to an appropriate value.

According to a sixth aspect of the present invention, a friction generating member made of an elastic material is provided at a sliding contact portion of a plurality of deformation preventing members and a joint.

With the above structure, the friction between the deformation preventing member and the sliding portion of the joint, which are divided into a plurality of parts, is greatly increased by the friction generating member, so that the large vibration generated at the time of breakthrough can be efficiently attenuated. Noise due to through can be significantly reduced.

[0024]

Embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view of a press machine, FIG. 2 is an enlarged sectional view of a deformation preventing member, FIG. 3 and FIG.
FIG. 5 et seq. Are explanatory views showing modified examples of the deformation preventing member.

In these figures, reference numeral 1 denotes a press body, which comprises side frames 1a arranged on the left and right, a bed 1b provided between the lower portions of these side frames 1a, and a crown 1c provided between the upper portions. 1a and between both ends of bed 1b and left and right side frames 1a
The two ends of the crown 1c are connected to each other by a fixing tool such as a bolt or welding means such as welding, so that the left and right side frames 1a, the bed 1b, and the crown 1c are integrated.

A bolster 2 is provided on the bed 1b, and a slide 3 is provided above the bolster 2 by a slide drive mechanism (not shown) provided in the crown 1c. . The slide 3 is supported slidably up and down by a slide gib 4 laid up and down on the opposing surfaces of the left and right side frames 1a. The slide 3 is moved up and down by the slide drive mechanism. Work can be formed between an upper die attached to the lower surface and a lower die (both not shown) installed on the bolster 2.

On the other hand, between the left and right side frames 1a, a deformation preventing the horizontal deformation of the press body 1, especially the side frame 1a, is provided at a position which does not hinder the pressing operation, for example, at a position slightly higher than the top dead center of the slide 3. The prevention member 5 is suspended. The deformation preventing member 5 is formed in a columnar or prismatic shape by a steel material having a cross-sectional area having sufficient rigidity to prevent horizontal deformation of the left and right side frames 1a, and has a central member 5a and both end members. 5b. The center member 5a has fitting recesses 5c at both end faces.
Are formed in the fitting recesses 5c.
The fitting projection 5d of b is fitted with a predetermined fit.

Each of the two end members 5b has a flange-like mounting portion 5e, and the fitting projection 5d projects from the mounting portion 5e. The other end member 5b is fixed to the opposing surface of the other side frame 1a via a shim 7 by a fixing tool 6. Then, with both end members 5b fixed to the left and right side frames 1a, a gap 8 smaller than the gap between the slide 3 and the slide gib 4 is formed between both end surfaces of the central member 5a and the mounting portions 5e of the both end members 5b. It has become. The gap 8 is adjusted to a predetermined value by the shim 7.

Next, the operation of the press machine constructed as described above will be described. The slide 3 is lowered by a slide drive mechanism provided in the crown 1c, and the upper die and the bolster 2 mounted on the lower surface of the slide 3 are moved. When the forming of the work is started between the set lower dies, the left and right side frames 1a are deformed inward and horizontally by the forming load F acting between the bed 1a and the crown 1c as shown in FIG. try to.

However, between the left and right side frames 1a,
When the deformation preventing member 5 is laid horizontally and the left and right side frames 1a attempt to deform in the horizontal direction, first, the center member 5
3a and the mounting portion 5e of the both end members 5b closely contact each other to eliminate the gap 8, and thereafter, as shown in FIG.
The central member 5a and both end members 5b are integrated to prevent horizontal deformation of the left and right side frames 1a, so that deformation of the press body 1 due to a forming load is suppressed, thereby enabling highly accurate forming. Since an appropriate gap is maintained between the slide 3 and the slide gib 4, the smooth deformation of the press body 1 prevents the vertical movement of the slide 3 or seizes on the sliding contact portion between the slide 3 and the slide gib 4. And abnormal wear can be prevented from occurring.

When an eccentric load is generated during press forming as shown in FIG. 4A, the left and right side frames 1a
Of the horizontal direction changes, the parallelism between the lower surface of the slide 3 and the upper surface of the bolster 2 decreases, and the molding accuracy also decreases. However, since the deformation preventing member 5 is horizontally laid between the left and right side frames 1a, the difference in the amount of horizontal deformation of the left and right side frames 1a due to the eccentric load is corrected as shown in FIG. As a result, it is possible to prevent a reduction in molding accuracy due to an eccentric load.

On the other hand, when the molding of the work is completed, the slide 3
Starts rising from the bottom dead center, the forming load acting on the press body 1 is instantaneously released, and the press body 1 that has been deformed by the forming load attempts to return to the original state.

In particular, when a work is punched out, a breakthrough occurs at the same time as the work is punched out, and the press body 1 vibrates and causes noise. However, the work is suspended horizontally between the left and right side frames 1a. Deformation prevention member 5
In this example, the vibration of the left and right side frames 1a is suppressed as follows to reduce noise caused by the vibration. That is, both end members 5b and the center member 5a fixed to the left and right side frames 1a are fitted with an appropriate fit, and a frictional force is generated between the two.

When the left and right side frames 1a, which have been deformed in the horizontal direction due to the forming load, attempt to return to the original position, a sudden return is suppressed by the frictional force between the both end members 5b and the center member 5a. Vibration of the press body 1 due to through can be suppressed, and thereby noise due to breakthrough can be significantly reduced.

FIG. 5 shows a modification of the deformation preventing member 5. As shown in FIG. 5A, a fitting projection 5d is provided on the center member 5a side, and fitting recesses 5c are provided on both end members 5b. The central member 5a may be provided as shown in FIG.
May be provided with a fitting concave portion 5c at one end and a fitting convex portion 5d at the other end, and the deformation preventing member 5 is divided into two, and the divided portions of each member 5 are fitted to each other, The left and right side frames 1
a.

FIG. 6A shows a state in which a friction generating member 9 made of an elastic material such as rubber or resin is filled in a fitting portion and a gap 8 between the center member 5a and both end members 5b.
A modified example in which vibration is attenuated using the frictional force of
6 (b) shows the friction between the sliding member 10a of the center member 5a and the joint 10 and the sliding member 10b of the both members 5b and the joint 10 with the joint 10 interposed between the center member 5a and both end members 5b. This shows a modified example in which vibration is attenuated by force. The joint between the joint 10 and the central member 5a is loosely fitted with a fixing member 12 such as a bolt in a through hole 5f opened in the central member 5a. Have been.

In this modification, the joint between the center member 5a and the both end members 5b is strengthened by the joint 10, and the rigidity of the deformation preventing member 5 is increased. In this modification and the modification in which the deformation preventing member 5 is divided into two parts, the center member 5a, both end members 5b, the sliding portion of the joint 10,
By interposing the friction generating member 9 made of an elastic material in the sliding portion of the divided member, even a large vibration can be efficiently attenuated by the friction generating member 9.

Although not shown, the center member 5a and both end members 5b may be screwed together. In the case of a screw, a gap is provided between the male screw and the female screw in advance, and there is a frictional force between the two. Therefore, vibration can be attenuated in the same manner as in the above-described modification.

[Brief description of the drawings]

FIG. 1 is a front view of a press machine according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a deformation preventing member provided in the press machine according to the embodiment of the present invention.

FIGS. 3A and 3B are explanatory views of the operation of the press machine according to the embodiment of the present invention.

FIGS. 4A and 4B are explanatory diagrams of the operation of the press machine according to the embodiment of the present invention.

FIGS. 5A and 5B are explanatory views showing a modification of the deformation preventing member provided in the press machine according to the embodiment of the present invention.

FIGS. 6A and 6B are explanatory views showing a modification of the deformation preventing member provided in the press machine according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Press body 1a ... Side frame 1b ... Bed 1c ... Crown 2 ... Bolster 3 ... Slide 5 ... Deformation prevention member 7 ... Shim 8 ... Gap 9 ... Friction generating member 10 ... Joint

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshitaka Nishihara 5 Yokaichi Town, Komatsu City, Ishikawa Prefecture Inside Komatsu Plant Co., Ltd. (72) Inventor Matsumoto sequentially 5 Yokaichi Town, Komatsu City, Ishikawa Prefecture Komatsu Industries Co., Ltd. F term in Komatsu factory (reference) 4E088 AA04 AB01

Claims (6)

[Claims] 1. A crown (1) on an upper part of a press body (1).
c) The slide (3) is moved up and down by a slide drive mechanism provided in (c), and the upper die mounted on the lower surface of the slide (3) and the lower die mounted on the bed (1b) or the bolster (2). In a press machine for forming a work between dies, a plurality of divided deformation preventing members (5) are laterally suspended between side frames (1a) arranged on the left and right sides of the press body (1), and A side frame (1a) -side end of the plurality of divided deformation preventing members (5) is fixed to the side frame (1a), and a predetermined horizontal gap is provided between the plurality of divided deformation preventing members (5). (8) A press machine characterized in that the press machine is fitted with existence. 2. The press machine according to claim 1, wherein a horizontal gap (8) between the plurality of divided deformation preventing members (5) is adjusted by a fixing tool such as a shim (7) or a bolt. 3. The press machine according to claim 1, wherein a friction generating member (9) made of an elastic material is provided at a sliding contact portion of the plurality of divided deformation preventing members (5). 4. The crown (1) on the upper part of the press body (1).
c) The slide (3) is moved up and down by a slide drive mechanism provided in (c), and the upper die mounted on the lower surface of the slide (3) and the lower die mounted on the bed (1b) or the bolster (2). In a press machine for forming a work between dies, a plurality of divided deformation preventing members (5) are laterally suspended between side frames (1a) arranged on the left and right sides of the press body (1), and A side frame (1a) -side end of the plurality of divided deformation preventing members (5) is fixed to the side frame (1a), and a predetermined horizontal gap is provided between the plurality of divided deformation preventing members (5). A press machine characterized in that (8) is fitted, and a plurality of divided deformation preventing members (5) are connected by a joint (10). 5. The press machine according to claim 4, wherein a horizontal gap (8) between the plurality of divided deformation preventing members (5) is adjusted by a fixing tool such as a shim (7) or a bolt. 6. The press machine according to claim 4, wherein a friction generating member (9) made of an elastic material is provided at a sliding contact portion of the plurality of divided deformation preventing members (5) and the joint (10).