JP2011051004A - Slide inclination preventive device of press machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slide inclination preventive device of a press machine capable of preventing any inclination of a slide during the press forming. <P>SOLUTION: The inclination preventive device of a slide 15 includes a slide guide 16 having a guide face 162 opposing a sliding face 152 of a side of the slide 15 and provided on a frame 13 to guide the slide 15, and a static pressure generating mechanism 30. In the longitudinal direction FB of a press machine 1, the guide face 162 is provided opposite to and across the slide 15 or the sliding face 152 is provided across and opposite to the slide guide 16. The guide face 162 is provided opposite to and across the slide 15 in the horizontal direction of the press machine 1. The static pressure generating mechanism 39 generates the static pressure between the guide face 162 and the sliding face 152. When the slide 15 is inclined with respect to the elevating/lowering direction of the slide 15, and a space between the guide face 162 and the sliding face 152 is narrowed, generating the reaction force in the space-increasing direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a slide tilt prevention device for a press machine.

  2. Description of the Related Art Conventionally, a press machine that performs press processing by transmitting power from a motor to a slide has been used. An upper mold is attached to the lower part of the slide of the press machine, and a lower mold is attached to the upper part of the bolster facing the slide. Then, as the slide moves up and down, the workpiece is pressed and molded with the upper mold and the lower mold.

In such a press machine, the slide gib is provided on the frame along the slide ascending / descending direction, and the side of the slide is configured to slide on the slide gib so that the slide elevating movement is guided by the slide gib. Things are known.
Also, cylindrical guide posts are provided at the four corners of the slide lower surface, and cylindrical guide members are provided on the bed corresponding to these guide posts so that the guide posts slide in the guide members. The structure which guides the raising / lowering motion of this is also known (for example, refer patent document 1).

JP-A-10-85997

  By the way, in a press machine, an eccentric load acts on a slide by a reaction force from a work accompanying press forming. At this time, the slide give restricts the tilt of the slide, but a gap is provided between the slide surface of the slide and the guide surface of the guide member to prevent seizure. Tolerate. The tilt of the slide not only affects the machining accuracy, but also impacts the entire press machine when a so-called breakthrough occurs in which the strain acting on the press machine is released at once as the workpiece is punched during press forming. Vibration will be applied, resulting in a worse working environment and a shorter machine life. For this reason, in a press machine, it is important to prevent the inclination of the slide at the time of press molding.

  Here, in Patent Document 1, a pocket chamber is formed on the guide surface in the guide member provided at the four corners on the bed below the slide, and the inside of the guide member slides by supplying pressure oil to the pocket chamber. The guide post is guided by a fluid bearing.

  However, the technology of Patent Document 1 is for suppressing the generation of frictional heat between the guide post and the guide member, and for preventing a reduction in processing accuracy due to the thermal expansion of the slide, and a configuration that takes into account the suppression of the tilt of the slide It is not. Specifically, a vertical groove is formed in the guide surface of the guide member, and when the gap between the guide surface and the sliding surface of the guide post is reduced, the pressure oil in the pocket chamber is The pressure that is discharged into the groove and acts on the guide post does not increase. For this reason, the technique of Patent Document 1 cannot prevent the tilt of the slide.

  An object of the present invention is to provide a slide tilt prevention device for a press machine that can prevent the slide tilt during press molding.

  A slide tilt prevention device for a press machine according to a first aspect of the present invention has a guide surface that opposes the slide surface of the slide side portion, and is provided on a frame of the press machine and guides the up and down movement of the slide. And a static pressure generating mechanism for generating a static pressure, and in the front-rear direction of the press machine, the guide surface is provided opposite to the slide, or the slide surface is provided with the slide give. The guide surface is provided to face the slide in the left-right direction of the press machine, and the static pressure generating mechanism is provided between the guide surface and the sliding surface. In addition to generating pressure, when the slide is inclined with respect to the ascending / descending direction of the slide and a gap between the guide surface and the sliding surface is narrowed, a reaction force in a direction to widen the gap is generated. Characterized in that to.

  According to a second invention, in the first invention, the static pressure generating mechanism has a pressure oil inflow hole for allowing pressure oil to flow in, and has a pocket section having a concave cross section formed in the guide surface or the sliding surface, A throttle provided in the pressure oil inflow hole, a pressure oil supply part for supplying pressure oil to the pocket part, and the pressure oil inflow hole, communicating between the pocket part and the pressure oil supply part, and And an oil passage communicating between the pocket portions.

  According to a third invention, in the second invention, the pocket portion is provided above and below the sliding surface in the ascending / descending direction, and the upper pocket portion is formed at an upper end portion of the sliding surface, The pocket portion is formed at a lower end portion of the sliding surface, and the upper pocket portion and the lower pocket portion are always opposed to the guide surface regardless of the position of the slide. To do.

  In a fourth aspect based on the second aspect, the pocket portions are provided above and below the guide surface in the ascending / descending direction, and the upper pocket portion is an upper end of the guide surface when the slide is at a bottom dead center. The lower pocket portion is formed at the lower end portion of the guide surface when the slide is at the top dead center, and the upper pocket portion and the lower pocket portion are formed on the slide. Regardless of the position, it always faces the sliding surface.

  According to a fifth invention, in the third or fourth invention, the pocket portion is provided at three or more locations on the guide surface or the sliding surface, and the pockets other than the upper pocket portion and the lower pocket portion. The portion is provided between the upper pocket portion and the lower pocket portion.

  In a sixth aspect based on the second aspect, the pocket portion, the restrictor, and the pressure oil inflow hole are formed in an integral block and fitted in a bottomed hole formed in the guide surface or the sliding surface. The bottomed hole is formed with an oil supply hole that communicates with the pressure oil inflow hole and constitutes the oil passage.

  A seventh invention is characterized in that, in any one of the first to sixth inventions, the guide surface and the sliding surface are provided so that the gap becomes smaller as going downward.

  According to the first invention, the tilt prevention device for the slide of the press machine includes a static pressure generating mechanism for generating a static pressure, and in the front-rear direction of the press machine, the guide surface is provided facing the slide, Alternatively, the sliding surfaces are provided to face each other with the slide gib interposed therebetween, and the guide surfaces are provided to face each other across the slide in the left-right direction of the press machine. The static pressure generation mechanism generates static pressure between the guide surface and the sliding surface, and when the slide is inclined with respect to the slide up / down direction and the gap between the guide surface and the sliding surface is narrowed, the gap is widened by a squeeze effect. Creates a reaction force in the direction. Thereby, since the slide is pushed back, the inclination of the slide at the time of press molding can be prevented. Accordingly, it is possible to improve the processing accuracy of the press machine and to suppress the impact and vibration of the press machine accompanying the occurrence of breakthrough during press forming.

  According to the second invention, the static pressure generating mechanism has a pressure oil inflow hole for allowing pressure oil to flow in, a pocket portion formed on the guide surface or the sliding surface, a throttle provided in the pressure oil inflow hole, Since the pressure oil supply section that supplies pressure oil to the pocket section and the oil passage that communicates between the pocket section and the pressure oil supply section and communicates between the pocket sections, the pressure oil supply section is provided outside. The pocket portion and the diaphragm may be formed on the guide surface of the slide give or the slide surface of the slide. For this reason, it is possible to equip the slide tilt prevention device without greatly changing the configuration of the conventional slide or slide give. Therefore, the cost can be reduced in installing the slide tilt prevention device.

According to the third invention, since the pocket portions constituting the static pressure generating mechanism are provided at the upper end portion and the lower end portion of the slide surface of the slide, the clearance between the slide surface and the guide surface when the slide is inclined. The pocket portion is provided at a position where the most changes. For this reason, when the slide is tilted, the static pressure greatly increases due to the squeeze effect, and accordingly, the reaction force in the direction of widening the gap between the sliding surface and the guide surface also increases. Therefore, the tilt of the slide can be prevented more effectively.
Further, since the pocket portion is provided on the slide, the pocket portion always faces the guide surface. Therefore, it is possible to always obtain an effect of preventing the tilt of the slide regardless of the position during the raising / lowering operation of the slide.

  According to the fourth invention, the pocket portion constituting the static pressure generating mechanism is formed on the upper end portion of the guide surface when the slide is at the bottom dead center and the lower end portion of the guide surface when the slide is at the top dead center. Since it is formed, the pocket portion always faces the guide surface regardless of the position of the slide. Further, the pocket portion is provided at a position where the gap between the sliding surface and the guide surface changes most in this case. Therefore, the reaction force in the direction of widening the gap between the sliding surface and the guide surface increases due to the increase in static pressure, regardless of the position during the raising / lowering operation of the slide, so that the inclination of the slide can always be prevented.

  Further, since the pocket portion is provided in the slide give, the pocket portion does not move in accordance with the lifting / lowering operation of the slide. For this reason, while being able to prevent the piping which comprises a part of oil path moving with the operation | movement of a slide, the length of the oil path between a pressure oil supply part and a pocket part can be shortened. Therefore, the degree of freedom in the layout of the oil passage can be improved.

  According to the fifth invention, the pocket portions are provided at the upper end portion and the lower end portion of the sliding surface of the slide, or the upper end portion of the guide surface and the slide are at the top dead center when the slide is at the bottom dead center. Since it is formed at the lower end of the guide surface and a pocket is provided between these pockets, all three pockets are always guided regardless of the slide position. Opposite. As a result, the number of places where the reaction force acts in the direction of widening the gap between the sliding surface and the guide surface increases, so that the tilt of the slide can be prevented more reliably.

  According to the sixth aspect of the invention, the pocket portion, the throttle, and the pressure oil inflow hole are formed in the integral block, so that the block is simply fitted and fixed to the bottomed hole formed in the guide surface or the sliding surface. A pocket portion can be provided on the guide surface or the sliding surface. In this case, since the pocket portion, the throttle, and the pressure oil inflow hole are blocked, they can be easily manufactured and the mass productivity of the static pressure generating mechanism can be improved.

  According to the seventh invention, since the guide surface and the sliding surface are provided so that the gap between the guide surface and the sliding surface becomes smaller as going downward, the static pressure generated by the static pressure generating mechanism is As the slide approaches the bottom dead center, it gradually rises due to the squeeze effect. Accordingly, the static pressure acting between the guide surface and the sliding surface can be easily increased by the lowering operation of the slide without increasing the pressure of the pressure oil from the pressure oil supply unit. Therefore, the effect of preventing the tilt of the slide can be enhanced with a simple configuration.

1 is an overall view showing a press machine according to a first embodiment of the present invention. FIG. 2 is a schematic view taken along line II-II in FIG. 1. FIG. 3 is a partially enlarged view around a slide give in FIG. 2. The figure which shows the relationship between the static pressure in a boquette part, and a clearance gap. The fragmentary sectional view around the slide give of the press machine according to the second embodiment of the present invention. The whole figure showing the press machine concerning a 3rd embodiment of the present invention. The fragmentary sectional view around the slide give of the press machine according to the third embodiment. The whole figure showing the press machine concerning a 4th embodiment of the present invention. FIG. 9 is a schematic diagram illustrating a partial cross section taken along line IX-IX in FIG. 8. FIG. 10 is a partially enlarged view around the slide give in FIG. 9. The schematic diagram which shows the effect | action of the inclination prevention apparatus of the slide of the press machine which concerns on 5th Embodiment of this invention. The schematic diagram which shows the slide part of the press machine which concerns on 6th Embodiment of this invention in cross section.

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the second and subsequent embodiments to be described later, the same components and components having the same functions as those in the first embodiment described below are denoted by the same reference numerals, and description thereof will be simplified or omitted.

[First Embodiment]
FIG. 1 shows an overall view of a press machine 1 according to the first embodiment of the present invention. In FIG. 1, the front-rear direction FB (see FIG. 2) of the press machine 1 refers to the short side direction of the moving bolster 17, and the left-right direction RL refers to the long side direction of the moving bolster 17.

  The press machine 1 has a so-called straight-side frame (also referred to as a portal frame) structure, and includes a bed 11, four columnar uprights 12 erected on the bed 11, and an upper portion of the upright 12. , A slide 15 provided below the crown 14, and a slide give 16 provided on the upright 12 along the up-and-down direction UD (see FIG. 1) of the slide 15. The frame of the press machine 1 includes an upright 12 and a crown 14.

  An upper mold (not shown) is attached to the lower surface of the slide 15. A moving bolster 17 is installed between the four uprights 12 on the bed 11, and a lower mold (not shown) is attached on the moving bolster 17. The slide 15 can be moved up and down by a slide drive mechanism 20 supported by the crown 14. When the slide 15 is moved up and down by driving the slide drive mechanism 20, the slide 15 is placed between the upper mold and the lower mold. The workpiece is pressed.

  FIG. 2 is a schematic diagram showing a cross section of the slide 15 portion of the press machine 1. As shown in FIG. 2, sliding portions 151 having an L-shaped cross section are provided at the four corners of the slide 15. A sliding surface 152 is formed at a portion of the sliding portion 151 facing the slide give 16, and when the slide 15 is raised or lowered, the slide surface 152 slides on the slide give 16 via the pressure oil. .

  The slide give 16 has a guide part 161 having a rectangular cross section, and the guide part 161 is provided with two guide surfaces 162 orthogonal to each other. The guide surface 162 is disposed to face the slide machine 15 in the front-rear direction FB of the press machine 1 and is also arranged to face the slide machine 15 in the left-right direction RL of the press machine 1.

  The sliding surface 152 and the guide surface 162 are arranged in parallel to each other along the ascending / descending direction UD of the slide 15, and the static pressure generated by the static pressure generating mechanism 30 is between the sliding surface 152 and the guide surface 162. Works. Then, the slide give 16 and the static pressure generating mechanism 30 are provided, and the tilt prevention device 40 for the slide 15 of the press machine 1 of the present invention is configured.

The static pressure generating mechanism 30 includes a hydraulic pump (pressure oil supply unit) 31, an oil passage 32, a pocket portion 33 (see FIGS. 1 and 3), and a throttle 34 (see FIG. 3).
The hydraulic pump 31 is driven by a drive source (not shown) and supplies pressure oil toward the pocket portion 33. As the type of oil to be used, for example, one having a viscosity as high as VG (Viscosity Grade) 150 is used. The hydraulic pump 31 and each pocket portion 33 are communicated with each other by an oil passage 32, and the pressure oil from the hydraulic pump 31 flows into each pocket portion 33 through the oil passage 32.

  The pocket portion 33 of the present embodiment includes an upper end portion of the guide surface 162 of the slide give 16 when the slide 15 is at a bottom dead center indicated by a two-dot chain line in FIG. It is provided in two places, upper and lower, with the lower end of the guide surface 162 when it is at a point. With this arrangement, the pocket portion 33 always faces the sliding surface 152 of the slide 15 regardless of the position of the slide 15.

  As shown in FIG. 3, the pocket portion 33 includes a pocket forming groove 331 formed in a concave shape in the guide surface 162 and a pressure oil inflow hole 332 that communicates with the pocket forming groove 331 and constitutes a part of the oil passage 32. The pocket forming groove 331 and the pressure oil inflow hole 332 communicate with each other through the throttle 34.

The throttle 34 is embedded in the pressure oil inflow hole 332 and adjusts the pressure of the pressure oil flowing into the pocket portion 33. In the throttle 34 of the present embodiment, a choke throttle whose ratio of the length dimension to the diameter dimension is relatively larger than that of the orifice is used, and is not easily affected by the viscosity of the oil. The pressure oil from the hydraulic pump 31 is adjusted to a predetermined pressure by the pressure loss in the throttle 34 and generates a static pressure in each pocket portion 33. The static pressure here is, for example, about 98 kPa (100 kg / cm ² ).

An operation of the tilt prevention device 40 of the slide 15 in the press machine 1 will be described.
First, the pressure oil from the hydraulic pump 31 flows into each pocket portion 33 and generates a static pressure in the pocket portion 33. Since the static pressure acts between the sliding surface 152 of the slide 15 and the guide surface 162 of the slide give 16, the slide 15 is guided in a non-contact state with respect to the slide give 16.
When the slide 15 descends to enter the forming zone and the forming of the work starts to form the workpiece, an eccentric load accompanying press forming acts on the slide 15 and the slide 15 tends to tilt with respect to the up-and-down direction UD. To do.

  Here, as shown in FIG. 4, when the gap between the sliding surface 152 and the guide surface 162 becomes smaller, the value of the static pressure in the pocket portion 33 becomes larger. For this reason, for example, when an eccentric load that tilts the slide 15 forward is applied during press molding, the gap between the slide surface 152 on the front side of the slide 15 and the guide surface 162 is reduced, and the pocket portion 33 is accordingly The value of static pressure increases. Further, when the sliding surface 152 suddenly approaches the guide surface 162 due to the inclination of the slide 15 during press molding, a squeeze effect is generated between the sliding surface 152 and the guide surface 162 due to the pressure generated by the viscous resistance of the pressure oil. The static pressure further increases.

Due to such an increase in static pressure, a reaction force that widens the gap between the sliding surface 152 and the guide surface 162 acts to push the slide 15 back. Such a static pressure action prevents the slide 15 from tilting.
Further, since static pressure always acts between the sliding surface 152 and the guide surface 162, the impact and vibration of the press machine accompanying the occurrence of breakthrough during press molding are absorbed and suppressed by the static pressure.

[Second Embodiment]
Next, a second embodiment of the present invention will be described based on FIG.
In the first embodiment described above, the pocket portion 33, the throttle 34, and the pressure oil inflow hole 332 are provided in the slide give 16. Further, the pocket portion 33 is composed of a pocket forming groove 331 formed in the guide surface 162 and a throttle 34 embedded in the pressure oil inflow hole 332 communicating with the pocket forming groove 331.

  On the other hand, in the second embodiment, as shown in FIG. 5, the pocket portion 33, the throttle 34, and the pressure oil inflow hole 332 are different in that they are provided on the slide 15. Further, the pocket portion 33 is formed into a block together with the aperture 34 using a block 35, and the block 35 is fitted and fixed to the slide 15.

  The pocket portion 33 according to the present embodiment includes a pocket forming groove 331 having a concave cross section and a pressure oil inflow hole 332 communicating with the pocket forming groove 331. Both the pocket forming groove 331 and the pressure oil inflow hole 332 are formed in the block 35, and a throttle 34 is embedded in the pressure oil inflow hole 332. As described above, the pocket portion 33 and the throttle 34 are integrally formed with the block 35 together with the pressure oil inflow hole 332.

  The pocket portion 33 configured in a block shape is provided at two locations, the upper and lower ends of the sliding surface 152 of the slide 15. Therefore, a bottomed hole 153 is formed in the sliding portion 151 of the slide 15, and the block 35 is fitted and fixed to the bottomed hole 153. An oil supply hole 155 communicating with the pressure oil inflow hole 332 is formed in the bottom surface portion 154 of the bottomed hole 153, and the oil supply hole 155 constitutes a part of the oil passage 32. Thereby, each pocket part 33 and the hydraulic pump 31 communicate with each other via the oil passage 32. Further, the surface of the block 35 where the pocket portion 33 is formed is opposed to the guide surface 162 of the slide give 16 and also functions as the slide surface 152 of the slide 15.

  In the tilt prevention device 40 of the slide 15 of the press machine 1 as described above, the same effects as those of the first embodiment described above can be obtained. Further, since the pocket portion 33, the throttle 34, and the pressure oil inflow hole 332 are blocked using the block 35, the block 35 is fitted and fixed to the bottomed hole 153 formed in the sliding surface 152 of the slide 15. Only by doing this, the pocket portion 33, the throttle 34, and the pressure oil inflow hole 332 can be easily provided in the slide 15.

[Third Embodiment]
Next, a third embodiment of the present invention will be described based on FIG. 6 and FIG.
In the first embodiment described above, the pocket portions 33 are provided at two locations, the upper and lower ends of the guide surface 162 of the slide give 16. Further, the pocket portion 33 is composed of a pocket forming groove 331 formed in the guide surface 162 and a throttle 34 embedded in the pressure oil inflow hole 332 communicating with the pocket forming groove 331.

  On the other hand, in 3rd Embodiment, as shown in FIG. 6, the point by which the pocket part 33 is provided in three places, the upper end part of the guide surface 162 of the slide give 16, the center part, and the lower end part, is different. Further, as shown in FIG. 7, the pocket portion 33, the throttle 34, and the pressure oil inflow hole 332 are formed into a block using a block 35 as in the second embodiment. The difference is that it is fitted and fixed to the bottom hole 163.

  Also in the press machine 1 as described above, the same effects as those of the first and second embodiments described above can be obtained. Moreover, since the pocket part 33 is provided in three places, the upper end part of the guide surface 162 of the slide give 16, the center part, and the lower end part, it is the direction of widening the clearance gap between the sliding surface 152 and the guide surface 162. The reaction force further increases and acts to further suppress the tilt of the slide.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described based on FIGS.
In the first to third embodiments described above, the press machine 1 has a straight-side frame structure.
In contrast, in the fourth embodiment, as shown in FIG. 8, the press machine 1 is different in that it has a so-called C-shaped frame structure that is C-shaped in a side view.

  In FIG. 8, the front-rear direction FB of the press machine 1 of the present embodiment refers to the extending direction of the bolster 17A, and the left-right direction RL refers to the direction orthogonal to the front-rear direction, that is, the facing direction of the side frames 13.

The press machine 1 includes a side frame 13, a crown 14 installed on the upper portion of the side frame 13, a slide 15 provided below the crown 14, and a front portion of the side frame 13 along the up / down direction UD of the slide 15. And a bolster 17 </ b> A provided below the slide 15.
Of these, the slide gibs 16 have pockets 33 that are located above and below the upper end of the guide surface 162 when the slide 15 is at the bottom dead center and the lower end of the guide surface 162 when the slide 15 is at the top dead center. It is provided in two places. Although not shown, an upper mold is attached to the lower surface of the slide 15, and a lower mold is attached to the bolster 17A.

In FIG. 9, which is a partial cross-section taken along line IX-IX in FIG. 8, a slide portion 151 having a rectangular cross section is provided on the side portion of the slide 15 in the left-right direction RL. A sliding surface 152 is formed at a portion facing 16.
Two slide gibs 16 are provided in front of each side frame 13. One slide gib 16 in each side frame 13 has a guide surface 162 facing the sliding surface 152 on the back side of the slide 15. The other slide give 16 has an L-shaped cross section, and its guide surface 162 faces the sliding surface 152 on the side portion side of the sliding portion 151 and the sliding surface 152 on the front portion side.

The static pressure generating mechanism 30 includes a hydraulic pump 31, an oil passage 32, a pocket portion 33 (see FIGS. 8 and 10), and a throttle 34 (see FIG. 10).
As shown in FIG. 10, the pocket portion 33 on the back side of the sliding portion 151 of the slide 15 communicates with an oil supply hole 131 formed in the side frame 13. Further, the side pocket portion 33 and the front pocket portion 33 of the sliding portion 151 are provided in the same slide gib 16, and the pressure oil inflow holes 332 communicate with each other in the slide gib 16. The pressure oil inflow hole 332 and the oil supply hole 131 are connected to the outside of the slide give 16 by a pipe 321 such as an OST steel pipe.

  Also in the press machine 1 as described above, the same effects as those of the first to third embodiments described above can be obtained. In particular, in the press machine 1 having the C-shaped frame structure as in the present embodiment, the longitudinal direction of the slide 15 is longer than that of the straight-side frame structure because of the frame structure in which the crown 14 is cantilevered from the rear. The inclination of FB tends to increase. For this reason, the tilt prevention effect of the slide 15 according to the present invention works extremely effectively.

[Fifth Embodiment]
Next, based on FIG. 11, 5th Embodiment of this invention is described.
In the first to fourth embodiments described above, the slide surface 152 of the slide 15 and the guide surface 162 of the slide give 16 are provided in parallel to each other along the ascending / descending direction UD of the slide 15.

  On the other hand, in the fifth embodiment, as shown in FIG. 11 schematically showing the slide 15 and the slide give 16, the sliding surface 152 and the guide surface 162 have different inclinations with respect to the ascending / descending direction UD of the slide 15. The difference is that it has corners. Although the inclination angles of the sliding surface 152 and the guide surface 162 are actually small values, in FIG. 11, the inclination angles are exaggerated for easy understanding.

  Similar to the first to fourth embodiments described above, the sliding surface 152 and the guide surface 162 are provided in pairs in each of the front-rear direction FB and the left-right direction RL of the press machine 1. . In addition, the pair of sliding surfaces 152 and the pair of guide surfaces 162 are formed so as to approach each other in the downward direction of the slide 15. The inclination angle of the sliding surface 152 and the guide surface 162 with respect to the ascending / descending direction UD of the slide 15 differs between the sliding surface 152 and the guide surface 162, and the inclination angle of the guide surface 162 is the inclination of the sliding surface 152. It is set larger than the angle.

  For this reason, as the slide 15 descends, the gap between the sliding surface 152 and the guide surface 162 gradually decreases, and accordingly, the static pressure of the pocket portion 33 gradually increases. Therefore, the static pressure acting between the sliding surface 152 and the guide surface 162 can be easily increased without increasing the pressure of the pressure oil from the hydraulic pump 31, and the effect of preventing the slide from tilting can be enhanced. .

[Sixth Embodiment]
Next, based on FIG. 12, 6th Embodiment of this invention is described.
In the first to fifth embodiments described above, the guide surface 162 of the slide give 16 is disposed so as to face the front-rear direction FB of the press machine 1 with the slide 15 interposed therebetween, and also in the left-right direction RL of the press machine 1. The slides 15 were arranged to face each other.

  On the other hand, in the sixth embodiment, as shown in FIG. 12, in the left-right direction RL of the press machine 1, the guide surface 162 is opposed to the slide 15, while the front-rear direction FB of the press machine 1. Is different in that the sliding surface 152 of the slide 15 is disposed opposite to the slide giving 16.

  In the present embodiment, the press machine 1 includes a side frame 13 provided between the uprights 12 in the front-rear direction, and the slide give 16 extends along the up / down direction UD of the slide 15 on the side frame 13 (see FIG. 1). Is provided.

  On the side of the slide 15 in the left-right direction RL, a sliding portion 151 having a plan view shape is provided. The sliding portion 151 is disposed so as to surround the periphery of the slide give 16, and a slide surface 152 is formed on a portion of the slide portion 151 facing the guide surface 162 of the slide give 16. Among these, the sliding surface 152 orthogonal to the front-rear direction FB of the press machine 1 is disposed opposite to the slide giving 16.

  One slide give 16 having a rectangular cross section is provided on each of the left and right side frames 13 on both sides of the press machine 1 in the left-right direction RL. The slide give 16 is provided with three guide surfaces 162, and the guide surfaces 162 orthogonal to the left-right direction RL of the press machine 1 are arranged to face each other with the slide 15 interposed therebetween.

  Also in the press machine 1 as described above, the same effects as those of the first to fifth embodiments described above can be obtained. Furthermore, in this embodiment, since the slide gibs 16 are provided one for each of the left and right side frames 13, the structure of the prevention device 40 for the slide 15 of the press machine 1 is simplified compared to the case where the slide gibs 16 are provided at four locations. Can be Therefore, the cost can be reduced when the prevention device 40 is installed.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the first embodiment, the slide give 16 is provided on the side frame 13 as long as it is provided at a position where the slide 15 can be guided. For example, the slide give 16 constitutes a frame of the press machine 1 together with the side frame 13. A slide give 16 may be provided on the upright 12.

In each of the above embodiments, the throttle 34 is embedded in the pressure oil inflow hole 332 formed in the slide give 16 or the block 35. However, the present invention is not limited to this. For example, the throttle 34 may be formed directly on the slide give 16 or the block 35. Good.
Further, the choke throttle is used as the throttle 34, but another throttle may be used as long as a predetermined static pressure can be generated in the pocket portion 33. For example, an orifice may be used.

  In each said embodiment, although the hydraulic pump 31 was used as a pressure oil supply part, it is not restricted to this, For example, you may use other pressure oil supply apparatuses, such as an accumulator.

  The present invention can be applied to a press machine of any frame structure having a slide.

  DESCRIPTION OF SYMBOLS 1 ... Press machine, 15 ... Slide, 16 ... Slide give, 30 ... Static pressure generating mechanism, 31 ... Hydraulic pump (pressure oil supply part), 32 ... Oil path, 33 ... Pocket part, 34 ... Restriction, 35 ... Block, 152 ... sliding surface, 153 ... bottomed hole, 155 ... oil supply hole, 162 ... guide surface, 163 ... bottomed hole, 332 ... pressure oil inflow hole, FB ... front and rear direction, RL ... left and right direction, UD ... up and down direction.

Claims (7)

An anti-slip device for a slide of a press machine,
A slide surface having a guide surface facing the sliding surface of the slide side portion, provided on a frame of the press machine and guiding the ascent and descent of the slide;
A static pressure generating mechanism for generating static pressure,
In the front-rear direction of the press machine, the guide surface is provided opposite to the slide, or the slide surface is provided opposite to the slide give,
In the left-right direction of the press machine, the guide surface is provided opposite to the slide,
The static pressure generating mechanism generates the static pressure between the guide surface and the sliding surface, and the slide is inclined with respect to the ascending / descending direction of the slide so that a gap between the guide surface and the sliding surface is present. A device for preventing tilting of a slide, characterized in that, when narrowed, a reaction force in a direction to widen the gap is generated. The apparatus for preventing tilting of a slide of a press machine according to claim 1,
The static pressure generating mechanism is
A pressure oil inflow hole through which pressure oil flows, and a pocket section having a concave cross section formed on the guide surface or the sliding surface;
A throttle provided in the pressure oil inflow hole;
A pressure oil supply section for supplying pressure oil to the pocket section;
An apparatus for preventing tilting of a slide, comprising: an oil passage that includes the pressure oil inflow hole, communicates between the pocket portion and the pressure oil supply portion, and communicates between the pocket portions. In the apparatus for preventing tilting of the slide of the press machine according to claim 2,
The pocket part is provided above and below the sliding direction on the sliding surface,
The upper pocket is formed at the upper end of the sliding surface,
The lower pocket portion is formed at the lower end of the sliding surface,
The device for preventing tilting of a slide, wherein the upper pocket portion and the lower pocket portion are always opposed to the guide surface regardless of the position of the slide. In the apparatus for preventing tilting of the slide of the press machine according to claim 2,
The pocket portions are provided above and below in the ascending / descending direction on the guide surface,
The upper pocket is formed at the upper end of the guide surface when the slide is at bottom dead center,
The lower pocket is formed at the lower end of the guide surface when the slide is at top dead center,
The device for preventing tilting of a slide, wherein the upper pocket portion and the lower pocket portion are always opposed to the sliding surface regardless of the position of the slide. In the inclination prevention apparatus of the slide of the press machine of Claim 3 or Claim 4,
The pocket portion is provided at three or more locations on the guide surface or the sliding surface,
The device for preventing tilting of a slide, wherein the pocket portions other than the upper pocket portion and the lower pocket portion are provided between the upper pocket portion and the lower pocket portion. In the apparatus for preventing tilting of the slide of the press machine according to claim 2,
The pocket portion, the throttle, and the pressure oil inflow hole are formed in an integral block, and are fitted and fixed to a bottomed hole formed in the guide surface or the sliding surface,
The bottomed hole is formed with an oil supply hole that communicates with the pressure oil inflow hole and constitutes the oil passage. In the inclination prevention apparatus of the slide of the press machine in any one of Claims 1-6,
The slide prevention device according to claim 1, wherein the guide surface and the sliding surface are provided so that the gap becomes smaller toward a lower side.

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