JP2006224155A - Press machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press machine which is easily and efficiently operated and can reliably and precisely perform shearing work and hole-punching work of a workpiece to be processed. <P>SOLUTION: The machine comprises one metal die 20a on which the workpiece to be pressed is placed, a table 22 on which the die 20a can be fixed, and a pair of slide rails 16 on which the table 22 can slidably be installed. On both sides in the horizontal direction of the table 22 which slides on the slide rails 16, two connecting supports 54 and a guide support 56 located therebetween are arranged respectively on each side of the table 22. A die fixing plate 60 is spanned slidably in the vertical direction and positioned by three supports 54, 56 on each side. The other die 20b fixed on the die fixing plate 60 and a cylinder shaft 68 of an air cylinder 70 jointed to the center of the die fixing plate 60 are provided so that the die fixing plate 60 is moved vertically by the air cylinder 70. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a press apparatus that performs cutting, drilling, bending, and the like on a workpiece by press working.

Conventionally, when a small part such as a resin switch button used for an electronic device or a toy is formed by injection molding, a molded body is formed integrally with the gate. In general, in order to separate a small molded body from a gate, it is separated using a dedicated hand press as disclosed in Patent Document 1 or using a tool such as a nipper. In addition, when processing such as drilling, bending, cutting excess parts, etc. on the work piece, shearing is performed by attaching a processing die to a hand press that is relatively easy to handle. .
JP-A-8-2247441 Japanese Patent Laid-Open No. 11-151596

  In the case of the above conventional technique, in order to separate the molded body from the gate, a working mold is attached to the hand press, the molded body with the gate is placed on the lower mold, and the lever of the hand press is manually operated. The molded body was separated from the gate. However, the molded body may not be completely separated from the gate due to inaccurate work such as when the lever is not sufficiently pushed down. At this time, if the molded body is forcibly torn, there are problems that burrs are generated in the molded body and unevenness remains in the cross section.

  In addition, when pressing a workpiece, a relatively strong force is required for pressing as compared with the case of cutting a gate. For this reason, the hand press has a problem that the force for pressing the workpiece is insufficient, burrs remain in the processed cross section, and the workpiece is wasted due to deformation during processing. Further, in press processing by hand press, when cutting processing is performed with high accuracy, variation is likely to occur depending on the skill level of the operator who operates, and efficiency is not good.

  On the other hand, a press device using fluid pressure such as an air cylinder is often used, but there is a problem that the device is generally complicated and expensive. In addition, in the case of a device having a simple configuration as disclosed in Patent Document 2, there is a variation in the movement and positioning of the upper mold, and it cannot be used for precise driving, and is used for processing parts that require dimensional accuracy. It was impossible.

  The present invention has been made in view of the above-described problems of the prior art, and is capable of reliably and precisely performing a cutting process and a drilling process on a workpiece, and an easy-to-operate and efficient press device. The purpose is to provide.

  The present invention includes one mold on which a workpiece to be pressed is placed, a table to which the mold can be attached, a pair of slide rails on which the table is slidable, and the slide Three each composed of two connecting struts provided on each side of the table sandwiched between the tables sliding on the rail, and one guide strut therebetween provided on each side sandwiching the table A mold fixing plate that is positioned by three columns on each side and slidably laid in the vertical direction, the other mold fixed to the mold fixing plate, And a cylinder shaft of an air cylinder connected to the center of the mold fixing plate, wherein the mold fixing plate moves up and down by the air cylinder.

  The two connecting struts on one side pass through the mold fixing plate and are fixed at both ends, and the guide strut is fixed at the lower end to the base so as to resist sliding of the mold fixing plate. The coil spring arrange | positioned in is inserted.

  The air cylinder is connected to an activation button for starting the supply of air. By depressing the activation button, an operation check valve or a delay device for delaying the operation is used to lower the press of the mold fixing plate to press and rise. Is a series of automatic operations.

  According to the press device of the present invention, even when drilling, cutting, bending or the like is performed on a workpiece, it can be precisely processed. In addition, since the press work is automatically performed by operating the start button, the operation is easy, and it is efficient with no variation regardless of the skill level of the operator.

  Hereinafter, an embodiment of a press apparatus according to the present invention will be described with reference to FIGS. The press device 10 of this embodiment is used when performing press working such as separation from a gate of an injection-molded molded body such as a resin switch part, drilling or bending of a workpiece.

  As shown in FIG. 1, the press device 10 of this embodiment has a pair of slide rails 16 parallel to the longitudinal direction on a rectangular base 14 in which four legs 12 are screwed so that the height can be adjusted. Is provided. The slide rails 16 are respectively fixed to the base 14 via rail bases 18. On the slide rail 16, a table 22 that is formed in a rectangular shape and to which a lower mold 20 a can be attached is slidably mounted via a rail grip portion 24.

  As shown in FIG. 2 and the like, a handle 26 is provided on one side surface of the table 22, and a side lock member 30 provided with a through hole 28 is attached to one side surface parallel to the slide rail 16. Yes. Further, on the base 14 in the vicinity of the side lock member 30, a push button type start button 32 having a switching valve inside is provided. As shown in FIG. 2, a press receiving portion 36 is provided on the side surface of the table 22 opposite to the side surface to which the side lock member 30 is attached. Further, a pressing metal fitting 38 a that is in contact with the pressing receiving portion 36 is attached to the base 14, and the front end of the pressing receiving portion 36 is positioned in contact with the front stopper 37.

  As shown in FIG. 1, the table 22 is provided with an abutting bolt 44 on the rear side surface of the table 22. The base 14 is provided with an abutting adjustment bolt 46 that comes into contact with the abutting bolt 44 when the table 22 is slid from the mounting position a to the press position b which is the rear end portion of the slide rail 16. It has been.

  Further, when the table 22 is in the press position b, a side lock air cylinder 50 provided with a side lock pin 48 that can be fitted into the through hole 28 of the side lock member 30 is attached to the base 14 via a mounting bracket. It has been. Further, a pressing metal fitting 38 b capable of coming into contact with the pressing receiving portion 36 of the table 22 is attached to the base 14. Further, as shown in FIG. 2, when the table 22 slides to the press position b, a backward end limit valve 52 with a roller capable of contacting the end of the table 22 is provided.

  Further, in the vicinity of both sides of the slide rail 16 at both ends in the short direction of the base 14, there are three support columns each including two connection columns 54 provided on each side and one guide column 56 therebetween. Is provided. Each of the connecting columns 54 is fixed to the base 14 at the lower end, and one connecting plate 58 is fixed to the upper end. The connecting plate 58 is fixed by two connecting struts 58 penetrating on both sides of the connecting plate 58, and a male screw is cut at the tip and fixed by a nut. And the guide support | pillar 56 is standingly fixed to the base 14 only in the lower end part.

  Mold fixing plates 60 are inserted into the four corners of the four connecting columns 54 on both sides of the base 14 so as to be slidable in parallel with the lower surface of the connecting plate 58. Guide cylinders 61 are inserted and fixed at the four corners of the mold fixing plate 60, and each connecting support post 54 is inserted through the guide cylinder 61. In addition, a guide cylinder 64 fixed to the mold fixing plate 60 is fitted in the guide pillar 56 between the connection pillars 54. The guide cylinder 64 provided on the mold fixing plate 60 includes a precise bearing 62, and the guide cylinder 64 is fitted to the distal end portion of the guide column 56 via the bearing 62 so as to be slidable without resistance. ing. Further, a compressed coil spring 66 with one end abutting against the bearing 62 is fitted into the guide column 56. The mold fixing plate 60 is formed so that the upper mold 20b can be attached as shown in FIG.

  An air cylinder 70 connected via a cylinder shaft 68 is provided on the connection plate 58 straddling the connection columns 54 on both sides so as to be positioned at the center of the mold fixing plate 60. A mold fixing plate 60 is provided so as to be vertically slidable. A bottom dead center check member 72 is attached to one end of the mold fixing plate 60, and a roller is attached so that the bottom dead center check member 72 contacts and swings in a state where the bottom dead center check member 72 is lowered until the press of the workpiece is completed. A bottom dead center detection valve 74 provided with a detection piece is attached to the base 14 via an attachment fitting.

  Between the slide rails 16 on the base 14 side of the table 22 at the press position b, as shown in FIG. 3, a pair of table support brackets 76 that prevent rail deformation at the time of pressing are parallel to the rails. Is provided. In addition, a pair of base reinforcing members 78 are provided in parallel with the short side direction of the base 14 just behind the base 14 on the back side of the base 14.

  An air supply member including a filter regulator 88 and the like is attached to the end portion of the connecting plate 58 via an L-shaped fitting 80 as shown in FIG. The air supply member includes a pipe connecting portion 82 to which pressurized air is connected, a residual pressure release valve 86 with a lever as shown in FIGS. 2 and 3, and the like, and a pipe (not shown) is provided. In the vicinity of the residual pressure release valve 86, a bottom dead center detection valve 74 is located, and an operation delay device including a throttle (not shown) is attached. The air cylinder 70 and the side lock air cylinder 50 are connected to a 5-port switching valve 90. The 5-port switching valve 90 switches the activation button 32 via a seating detection valve (not shown) or a cover confirmation valve 94 described later. Connected to the valve.

  Further, as shown in FIG. 1, a cover 92 is provided so as to cover the vicinity of the connecting column 54, the guide column 56, and the supply adjusting unit 82 that constitute the press device 10. Then, as shown in FIG. 4, the cover confirmation valve 94 is attached to the upper portion of the base 14 via a mounting bracket at a position where it can contact the inside of the cover 92.

  Next, operation | movement of the press apparatus 10 of this embodiment is demonstrated. First, a pipe for supplying air from an air compressor (not shown) is connected to the pipe connecting portion 82. Then, as shown in FIG. 3, the molds 20a and 20b are fixed to the table 22 and the mold fixing plate 60, respectively. At this time, a mold fixing bolt (not shown) of the mold fixing plate 60 is tightened so that the mold 20a moves slightly. Next, the table 22 is slid and moved from the placement position a to the press position b on the slide rail 16, and the filter regulator 88 is adjusted as appropriate so as to supply weak air. Subsequently, the start button 32 is pressed down to lower the mold fixing plate 60 so that the molds 20a and 20b are fitted. As a result, the positions of the upper and lower molds 20a and 20b are accurately determined from each other. Therefore, the mounting position of the mold 20b is fixed by tightening the mold fixing bolts.

  Next, the pressing operation will be described. First, a workpiece (not shown) is placed on a mold 20 a attached to a table 22 at the placement position 20. And the handle 26 of the table 22 is pushed, and the table 22 is slid to the press position b. Subsequently, the start button 32 is pressed. Then, the air supplied from the pipe connection part 82 passes through the residual pressure release valve 86, the valve in the start button 32, the cover confirmation control valve 94, and the reverse end limit valve 52, and the side lock air from the 5-port switching valve 90. The cylinder 50 and the air cylinder 70 are operated. At this time, since the supplied air pressure is the same pressure, the side lock air cylinder 50 having the smaller inner diameter first fits the side lock pin 48 to the side lock member 30, and then the air cylinder 70 is moved to the mold fixing plate 58. Descent.

  When the mold fixing plate 60 is lowered by the air cylinder 70, the bottom dead center check member 72 pushes the roller portion of the bottom dead center detection valve 74 to operate it at an appropriate position. Then, the delay device switching valve of the delay device is switched by a delay device (not shown) so that the side lock pin 48 is released and the mold fixing plate 60 is moved in the upward direction after a predetermined delay time. By this switching, the 5-port switching valve 90 switches the air flow, retracts the side lock air cylinder 50, and raises the air cylinder 70. Then, holding the handle 26, the table 22 is slid from the press position b to the placement position a, and the press work of the workpiece is completed.

  According to the press device of this embodiment, the mold fixing plate 60 is supported by the three support posts 54 including the two connection support posts 54 and the guide support post 56 therebetween. Become. Further, since the guide column 56 is moved up and down by the guide cylinder 64 and the precision bearing 62, the precision can be slid without rattling and the press working can be performed precisely. Furthermore, since the press work is automatically performed by operating the start button 32, the operation is easy, and variations do not occur regardless of the skill level of the operator who operates the press device 10. In addition, since only air is used for the power source of the press device 10 and no electric power is used, power saving is possible and economical.

  Further, since the coil spring 66 is fitted and inserted into the guide column 56, the mold fixing plate 60 does not descend and maintains the raised position even when air is not sent to the air cylinder 70. There is no possibility that 20a and 20b collide accidentally. Furthermore, when performing a press work, it has a protective effect of a workpiece to be pressed or the like due to an appropriate buffer property. In addition, since the cover confirmation control valve 94 does not malfunction when the cover is not completely attached, the safety is high.

  In addition, the press apparatus of this invention is not limited to the said embodiment, Since the metal mold | die fixed to a table and the metal mold | die fixed to a metal mold fixing plate should just be formed in a pair, it is a cutting process. It can handle a variety of press work, from punching to bending.

It is a schematic side view of the press apparatus of one Embodiment of this invention. It is a schematic plan view of the press apparatus of this embodiment. It is a schematic front view of the press apparatus of this embodiment. It is a schematic rear view of the press apparatus of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Press apparatus 14 Base 16 Slide rail 20a, 20b Mold 22 Table 32 Starting button 54 Connection support column 56 Guide support column 58 Connection plate 60 Mold fixing plate 61, 64 Guide cylinder 62 Bearing 66 Coil spring 68 Cylinder shaft 70 Air cylinder 82 Piping Connection 90 5-port switching valve a Placement position b Press position

Claims (3)

  One mold on which a workpiece to be pressed is placed, a table to which the mold can be attached, a pair of slide rails on which the table is slidable, and a slide on the slide rail Three struts each provided with two connecting struts and one guide strut therebetween provided on both sides in the horizontal direction across the moving table; A mold fixing plate positioned by three columns on one side and slidable in the vertical direction, the other mold fixed to the mold fixing plate, and the mold fixing plate And a cylinder shaft of an air cylinder connected to the center, and the mold fixing plate moves up and down by the air cylinder.   The two connecting struts on one side pass through the mold fixing plate and are fixed at both ends, and the guide strut is fixed to the base at the lower end and arranged to resist sliding of the mold fixing plate The press apparatus according to claim 1, wherein a coil spring is inserted and inserted. The air cylinder is connected to an activation button for starting the supply of air, and when the activation button is depressed, the operation from the lowering of the mold fixing plate to the pressing and the raising is automatically performed via an operation check valve and a delay device. 3. The press device according to claim 1, wherein the press device operates in a series.

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