JP4956383B2 - Press pressure correction device and correction method for transfer press - Google Patents

Description

  The present invention relates to a press pressure correction device and a correction method for a transfer press.

Conventionally, a bed, a bolster attached to the bed and supporting a lower mold of the mold, a plurality of columnar uprights rising from an end of the bed, a crown attached to an upper portion of each upright, In a hydraulic press that is supported by an upright so that it can move up and down and is driven up and down by a plunger of a driving mechanism provided on the crown, the press quality is improved by suppressing the bending of each upright during press molding. There is what was planned (for example, refer to Patent Document 1).
JP 09-052200 A

Here, among the hydraulic presses, there is a transfer press that supports a plurality of dies with respect to a single slide, and performs press processing step by step while sequentially transporting workpieces between processing positions by the dies. is there. The upper mold of each mold is individually supported on the main slide (the slide) via the sub slide.
By the way, in the transfer press, the plunger of the drive mechanism is not provided for each mold, and is usually provided in a pair on both sides of the main slide. In this case, the press reaction force tends to concentrate on the central part of the main slide without the plunger, and the central part may bend upward so that a sufficient pressing pressure may not be applied to the mold located below the die. There is a problem that molding defects occur due to being less than the specified value.
In addition, it is conceivable to increase the pressing force from the plunger in order to apply a sufficient pressing pressure to the central portion of the main slide. In this case, however, the pressing reaction force concentrated on the central portion of the main slide is also increased. There are problems such as inducing damage to the main slide and mold, generating repair costs and man-hours, and shortening the equipment life.
Accordingly, the present invention provides a press pressure correction device and a correction method for a transfer press that can apply a sufficient press pressure to the central portion of the main slide while suppressing the influence of the pressing reaction force on the central portion of the main slide.

  As a means for solving the above problems, the invention described in claim 1 includes a bed (for example, the bed 2 in the embodiment) and a plurality of molds (for example, the molds 10a, 10b, and 10c in the embodiment) mounted on the bed. ) Bolster (for example, bolster 3 in the embodiment) for supporting the lower mold (for example, lower molds 12a, 12b, 12c in the embodiment), and a plurality of columnar uprights (for example, upright 4 in the embodiment) rising from the end of the bed. ), A crown (for example, the crown 5 in the embodiment) attached to the upper portion of each upright, and a plunger of the driving mechanism (for example, the plunger 6 in the embodiment) that is supported by the respective uprights so as to be movable up and down. Main slide (for example, main slide 7 in the embodiment) driven up and down by An upper portion (for example, the upper wall 31 in the embodiment) is provided on the support wall (for example, the support wall 25 in the embodiment) of the main slide to support the upper mold (for example, the upper molds 11a, 11b, and 11c in the embodiment). In a press pressure correction device of a transfer press (for example, the transfer press 1 in the embodiment) including a plurality of sub slides (for example, the sub slides 8a, 8b, and 8c in the embodiment), the upper mold in each of the sub slides is An outer periphery of a lower portion to be supported (for example, the lower wall 32 in the embodiment), and a lower end of an outer peripheral wall (for example, the outer peripheral wall 23 in the embodiment) that extends below the support wall in the main slide and surrounds the outer periphery of each sub-slide. A plurality of hydraulic cylinders (for example, the hydraulic cylinder 40 in the embodiment) are disposed between Through the respective hydraulic cylinders, characterized by supporting a lower portion of each of the sub-slide on the outer peripheral wall of the main slide.

  The invention described in claim 2 is a bed (for example, the bed 2 in the embodiment) and a lower mold (for example, the embodiment) attached to the bed (for example, the molds 10a, 10b, and 10c in the embodiment). A bolster (e.g., bolster 3 in the embodiment) that supports the lower molds 12a, 12b, and 12c) in the example, a plurality of columnar uprights (e.g., upright 4 in the embodiment) that rise from the end of the bed, A main body driven up and down by a crown (for example, the crown 5 in the embodiment) attached to the upper portion and a plunger (for example, a plunger 6 in the embodiment) of the driving mechanism provided on the crown and supported by the uprights so as to be movable up and down. Slide (for example, main slide 7 in the embodiment) and upper mold (for example, embodiment) of each mold A plurality of sub-slides (for example, the upper wall 31 in the embodiment) are supported by the support wall (for example, the support wall 25 in the embodiment) of the main slide so as to support the upper molds 11a, 11b, and 11c) In a press pressure correction method of a transfer press (for example, transfer press 1 in the embodiment) including the sub slides 8a, 8b, and 8c in the embodiment, a lower portion (for example, a bottom in the embodiment) that supports the upper mold in each of the sub slides. A plurality of hydraulic cylinders between the outer periphery of the wall 32) and the lower end of the outer peripheral wall (for example, the outer peripheral wall 23 in the embodiment) that extends below the support wall of the main slide and surrounds the outer periphery of each sub-slide. (For example, the hydraulic cylinder 40 in the embodiment) is disposed, and the respective molds are removed. A pressure measuring device (for example, a load cell 73 in the embodiment) is disposed at the position where the molds are disposed on the bolster or each sub-slide, and the main slide is lowered to a predetermined lower end position and the hydraulic pressure is increased. A predetermined hydraulic pressure is supplied to the cylinder, and the lower end position of the main slide and the hydraulic pressure of each hydraulic cylinder are adjusted so that the pressing forces applied to the pressure measuring devices are uniform and appropriate to each other. It is characterized by adjusting.

  According to the first aspect of the present invention, the outer periphery of the lower part supporting the upper mold in each sub-slide is supported on the lower end of the outer peripheral wall surrounding the outer periphery of each sub-slide in the main slide via a plurality of hydraulic cylinders. As a result, the press reaction force input to the main slide via the upper die and the sub-slide is distributed and supported by the support wall and the outer peripheral wall, and a buffering action by the hydraulic pressure of the hydraulic cylinder also occurs. Therefore, the pressing force from the plunger against the main slide and thus the press reaction force is not increased, and in particular, the deformation at the center portion of the main slide where the press reaction force tends to concentrate is suppressed, and the center portion is also sufficient. The press quality can be increased by adding press pressure, and the life of the main slide, mold, and thus the entire equipment can be extended. That.

  According to the second aspect of the present invention, the lower end position of the main slide and the operating hydraulic pressure of each of the hydraulic cylinders are adjusted so that the press pressures at the positions where the molds are disposed have uniform and appropriate values. In this way, the pressing force from the plunger against the main slide and thus the press reaction force is not increased. The pressure can be applied to improve the press quality, and the life of the main slide, the mold, and the entire equipment can be extended.

  Embodiments of the present invention will be described below with reference to the drawings. In the figure, the arrow FR indicates the front, the arrow LH indicates the left side, and the arrow UP indicates the upper side.

  FIG. 1 is a front view of a transfer press 1 according to this embodiment. The transfer press 1 includes a bed 2 installed on a factory floor and a plurality of molds 10a, 10b, 10c attached on the bed 2. A bolster 3 that supports the lower molds 12a, 12b, and 12c, a pair of columnar uprights 4 that rise from the left and right ends of the bed 2, a crown 5 that is attached between the upper portions of the uprights 4, and the uprights 4 The main slide 7 is driven up and down by a pair of left and right plungers 6 of a drive mechanism (not shown) supported on the crown 5 so as to be slidable up and down, and the upper molds 11a and 11b of the molds 10a, 10b and 10c. , 11c, a plurality of (three) sub-slides 8a, 8b, 8c supported below the support wall 25 at the top of the main slide 7, respectively. Ete made.

Referring also to FIG. 2, the sub-slides 8a, 8b, and 8c have substantially the same configuration and are arranged in a line on the left and right. Hereinafter, the sub slides 8a, 8b, and 8c are referred to as a first sub slide 8a, a second sub slide 8b, and a third sub slide 8c in order from the left.
In addition, the space under the main slide 7 is roughly divided into left and right, and the lower portions of the sub-slides 8a, 8b, and 8c and the molds 10a, 10b, and 10c are disposed at the respective positions. Hereinafter, the space under the main slide 7 is referred to as a first machining position 9a, a second machining position 9b, and a third machining position 9c in order from the left.

  The lower walls of a pair of left and right support rods 13 are coupled to the upper wall 31 of each sub-slide 8a, 8b, 8c via a fastening member 14, and the upper portions of the left and right support rods 13 are respectively connected to the main slide via a ball screw mechanism 15. 7 are supported by the support walls 25 of the respective members. By moving the support rods 13 up and down by driving the ball screw mechanism 15, the vertical positions of the sub-slides 8a, 8b, and 8c can be adjusted, and the upper molds 11a, 10b, and 10c of the molds 10a, 10b, and 10c can be adjusted. The heights of 11b and 11c can be adjusted. As a result, different molds 10a, 10b, and 10c are arranged for the respective processing positions 9a, 9b, and 9c, and press molding can be performed simultaneously and at a constant pressure.

  The main slide 7 has rectangular upper and lower walls 21 and 22 that are long in the arrangement direction (left and right direction) of the sub slides 8a, 8b, and 8c, and an outer peripheral wall provided between the outer peripheries of the upper and lower walls 21 and 22. 23 and a left and right partition wall 24 that divides the space inside the outer peripheral wall 23 into left and right substantially equally. The lower wall 22 is formed larger than the upper wall 21. Hereinafter, the spaces partitioned by the partition walls 24 inside the outer peripheral wall 23 are referred to as a first space 24a, a second space 24b, and a third space 24c in order from the left.

  In each of the spaces 24a, 24b, 24c, the support wall 25 having a square shape in plan view is fixed to the upper wall 21, and each of the sub-slides 8a, 8b, 8c having the same square shape in plan view is fixed. Each upper part is faced. Hereinafter, each configuration surrounding the outer periphery of each space 24a, 24b, 24c by the outer peripheral wall 23 and each partition wall 24 may be referred to as a first outer peripheral wall 23a, a second outer peripheral wall 23b, and a third outer peripheral wall 23c in order from the left. . In addition, although the support wall 25 is divided | segmented for each space 24a, 24b, 24c, of course, these may be integrated.

  Each of the sub-slides 8a, 8b, and 8c is integrally formed with upper and lower walls 31 and 32 having a rectangular shape in plan view and an outer peripheral wall 33 provided between the outer peripheries of the upper and lower walls 31 and 32. The lower wall 32 is larger than the upper wall 31, and the ram cushion plate 16 is attached below the lower wall 32 so as to overlap therewith. The upper molds 11a, 11b, 11c of the molds 10a, 10b, 10c are supported under the lower wall 32 through the ram cushion plate 16.

  The lower wall 22 of the main slide 7 is formed with a plurality of rectangular openings 26 in plan view through which the sub-slides 8a, 8b, and 8c can be inserted, and the sub-slides 8a, 8b, and 8c are formed through the openings 26. The upper part faces the main slide 7. The lower wall 22 of the main slide 7 is only joined to the outer peripheral wall 23 and the lower end surfaces of the partition walls 24 by forming the openings 26 and remains in a frame shape.

  Guide rails 27 extending vertically are integrally provided on the left and right inner surfaces of the outer peripheral walls 23a, 23b, and 23c of the main slide 7, and on the left and right sides of the outer peripheral wall 33 of the sub slides 8a, 8b, and 8c, Guide members 28 are integrally provided on the guide rails 27 so as to be slidable up and down.

  Each plunger 6 of the drive mechanism is located above the central portion of the first and third sub-slides 8a and 8c in plan view, and each plunger 6 extends below the crown 5 so that the upper wall of the main slide 7 21, and the lower end thereof is integrally coupled to the support wall 25. That is, the plunger of the drive mechanism is not disposed above the second sub-slide 8b (above the central portion in the longitudinal direction of the main slide 7 that is long in the direction in which the sub-slides 8a, 8b, and 8c are arranged).

  In the transfer press 1, when a workpiece is conveyed to the first machining position 9a by a workpiece conveying means (not shown), and each plunger 6 is stroked downward by the operation of the driving device, the main slide 7 is lowered. 7, the sub-slides 8 a, 8 b, 8 c and the upper molds 11 a, 11 b, 11 c are lowered, and the workpiece is first subjected to predetermined pressing at the first machining position 9 a.

  Thereafter, the workpiece is conveyed to the second machining position 9b by the workpiece conveying means and a new workpiece is conveyed to the first machining position 9a, and a predetermined press is applied to each workpiece at the first and second machining positions 9a, 9b. After machining, the workpieces are further conveyed to the second and third machining positions 9b and 9c, and a new workpiece is conveyed to the first machining position 9a. The workpieces are moved to the machining positions 9a, 9b, and 9c. A predetermined pressing process is performed. The work after the press working at the third working position 9c is taken out of the transfer press 1 by the work carrying means, and a new work in place thereof is carried to the first working position 9a. By repeating the above steps, it is possible to perform press work step by step while sequentially transferring the workpiece between the respective machining positions 9a, 9b, 9c.

  Here, the outer periphery of the lower wall 32 that supports the upper molds 11a, 11b, and 11c of the molds 10a, 10b, and 10c in the sub-slides 8a, 8b, and 8c, and the lower surface of the lower wall 22 of the main slide 7 There are a plurality of hydraulic cylinders 40 (four each for each sub-slide 8a, 8b, 8c) with the stroke axis line extending in the vertical direction (in detail, between the lower surface of the lower wall 22 remaining in a frame shape). Arranged.

  Each hydraulic cylinder 40 is positioned in the vicinity of the four corners on the lower wall 32 of each sub-slide 8a, 8b, 8c, and its cylinder body 41 projects outward from the outer peripheral wall 33 of each sub-slide 8a, 8b, 8c. The piston rod 42 is installed on the lower wall 32 and extends upward (outer peripheral wall 23) from the cylinder body 41. The receiving portion 43 at the tip of the piston rod 42 is abutted against the lower surface of the lower wall 22 of the main slide 7.

  Each hydraulic cylinder 40 is connected to a relay 44 provided for each sub-slide 8a, 8b, 8c via a branch hydraulic path 45, respectively. Each relay 44 is connected to a hydraulic pump mechanism 50 provided for each of the sub-slides 8a, 8b, and 8c via a collective hydraulic path 46, respectively. Each relay 44 is provided with a hydraulic pressure gauge 47, and the hydraulic pressure gauge 47 is electrically (communicatably) connected to the transfer press control mechanism 48.

  As shown in FIG. 3, the hydraulic pump mechanism 50 includes, for example, a pair of oil pumps 53 to which an air pressure path 52 extending from the air pressure source 51 is connected, and a collective oil pressure of the relay 44 from the discharge port of each oil pump 53. A pair of hydraulic paths 54 leading to the path 46, a pair of hold valves 55 provided in the middle of each hydraulic path 54, and a pair of branch pneumatic paths branching from the pneumatic path 52 to each hold valve 55 56 and a pair of solenoid valves 57 respectively provided in the middle of each branch air pressure path 56.

In the figure, reference numerals 58 and 59 denote an air filter and an air pressure regulator provided in the pneumatic path 52, reference numeral 61 denotes a sub air filter provided in the branch air pressure path 56, and reference numeral 62 denotes hydraulic oil for each hydraulic cylinder 40. Reference numeral 63 denotes a relief valve that branches from the vicinity of the oil pump 53 of each hydraulic path 54, and reference numeral 64 denotes a communication path that allows the oil pump 53 side to communicate with each other rather than the hold valve 55 of each hydraulic path 54. Reference numeral 65 denotes a second relief valve provided at the end of the communication path 64, and reference numeral 66 denotes a hydraulic regulator connected to the relay 44 side of the hold valve 55 of each hydraulic path 54.
The operation of each hydraulic regulator 66 and the like is controlled by the transfer press control mechanism 48, and a predetermined operating oil pressure can be supplied to each hydraulic cylinder 40 in accordance with the measured value of the hydraulic pressure gauge 47 or the like.

  Each oil pump 53 is driven by the air pressure from the air pressure source 51 and discharges the hydraulic oil in the oil tank 62 sucked through the strainer 67 to the relay 44 side. Each hold valve 55 normally shuts off the hydraulic path 54 and opens when the air pressure is supplied from the air pressure source 51 to open each hydraulic path 54 and supply the hydraulic pressure from each oil pump 53 to the relay 44 side. Make it possible. The electromagnetic valve 57 normally shuts off the branch air pressure path 56 and opens when the current is supplied from the outside to open the branch air pressure path 56 so that air pressure from the air pressure source 51 can be supplied to each hold valve 55 side. To do.

  The hydraulic pressure supplied from the collective hydraulic path 46 to the relay 44 is equally supplied to the hydraulic cylinders 40 via the branch hydraulic paths 45. This hydraulic pressure is introduced into the hydraulic chamber 42b below the piston 42a in the cylinder body 41 of each hydraulic cylinder 40, and the hydraulic pressure presses the piston rod 42 upward.

  The outer periphery of the lower wall 32 of each sub-slide 8a, 8b, 8c is supported by the lower surface of the lower wall 22 of the main slide 7 through these hydraulic cylinders 40 (see FIG. 4). That is, the upper walls 31 of the sub-slides 8a, 8b, and 8c are supported by the support wall 25 of the main slide 7 via the support rods 13, and the lower wall 32 is supported by the lower wall 22 of the main slide 7. It is supported via each hydraulic cylinder 40.

  1 and 2, in the transfer press 1, each plunger 6 of the drive mechanism is located above the first and third sub-slides 8a and 8c, and thus above the second sub-slide 8b ( No pressing force is applied from above the central portion of the main slide 7. For this reason, when the press reaction force acting on each of the sub-slides 8a, 8b, and 8c is supported only by the support wall 25 of the main slide 7, the center portion is concentrated due to the concentration of the press reaction force on the center portion of the main slide 7. Is easy to bend upward, and a sufficient pressing pressure may not be applied to the mold 10b located therebelow.

  On the other hand, in the transfer press 1, the outer periphery of the lower wall 32 that supports the upper molds 11a, 11b, and 11c of the molds 10a, 10b, and 10c in the sub-slides 8a, 8b, and 8c is respectively connected to the hydraulic cylinder 40. The press reaction force acting on each sub-slide 8a, 8b, 8c can be dispersed and supported on the support wall 25 and the outer peripheral wall 23 of the main slide 7 by supporting the lower slide 22 on the lower surface 22 of the main slide 7 via At the same time, by obtaining a buffering action by the hydraulic pressure of the hydraulic cylinder 40, it is possible to suppress the bending at the central portion of the main slide 7 in particular, and to easily secure the press pressure to the mold 10b located below the main slide 7.

  Further, by improving the support balance for each sub-slide 8a, 8b, 8c, the bending of the sub-slides 8a, 8b, 8c and the main slide 7 for each processing position 9a, 9b, 9c is suppressed, and Even if bending occurs at each processing position 9a, 9b, 9c, each hydraulic cylinder 40 communicates with each other via the relay 44, so that the hydraulic pressure of each hydraulic cylinder 40 is kept uniform, and each sub-slide The support balance of 8a, 8b, 8c is kept good.

Next, a method for setting the hydraulic pressure of the hydraulic cylinder 40 will be described.
First, as shown in FIG. 5, the molds 10a, 10b, 10c are removed from the processing positions 9a, 9b, 9c, and the lower molds 12a, 12b, 12c of the molds 10a, 10b, 10c on the bolster 3, for example. Abutment base 71 having a predetermined height is disposed at the disposition position, and a load cell 73 is disposed on each of the thrust bases 71 via a height adjustment block 72, respectively. The height of each load cell 73 with respect to the bolster 3 is adjusted by the height adjustment block 72 according to the molds 10a, 10b, and 10c to be supported.

  Next, the height of each sub-slide 8a, 8b, 8c with respect to the main slide 7 is individually adjusted according to the mold to be supported, and a predetermined operating oil pressure is supplied to each hydraulic cylinder 40. As shown, the drive unit is operated to lower the main slide 7 to a predetermined lower end position, and the ram cushion plates 16 of the sub-slides 8a, 8b, 8c are brought into contact with the load cells 73 and pressed. The predetermined lower end position of the main slide 7 and the predetermined operating hydraulic pressure of the hydraulic cylinder 40 are set to a desired pressing pressure without considering the bending of the main slide 7 and the sub-slides 8a, 8b, 8c and the like. It is a value calculated to obtain.

  When each load cell 73 is pressed, the press reaction force concentrates on the central portion of the main slide 7 as in the case of press molding. This reaction force is distributed and supported on the support wall 25 and the outer peripheral wall 23 of the main slide 7 as described above, and also causes a buffering action by the hydraulic pressure of the hydraulic cylinder 40, so that the central portion of the main slide 7 is bent. Although it is suppressed, the measured value of the load cell 73 below the central portion (that is, the press pressure at the second processing position 9b) is smaller than the other because it bends slightly upward with respect to both side portions of the main slide 7. Slightly lower.

  Therefore, in a state where the main slide 7 is lowered, the deformation of the main slide 7 is minimized, that is, the pressing force applied to each load cell 73 is uniform with each other, and these are the appropriate pressing pressures. Thus, the hydraulic pressure of each hydraulic cylinder 40 for each sub-slide 8a, 8b, 8c, the lower end position of the main slide 7, etc. are adjusted. Adjustment of the hydraulic pressure of each hydraulic cylinder 40 is performed by controlling the hydraulic regulator 66 and the like by an external operation of the transfer press control mechanism 48.

After completing the initial setting of the hydraulic pressure of each hydraulic cylinder 40 in this way, a predetermined mold is supported at each processing position 9a, 9b, 9c, and press molding is performed using each mold. Is possible.
That is, the pressing force from the plunger 6 on the main slide 7 and thus the increase of the press reaction force is suppressed, and in particular, the deformation at the central portion of the main slide 7 where the press reaction force is likely to concentrate is suppressed. Of course, it is possible to perform the above-described setting by disposing the load cell 73 at the disposition position of the upper molds 11a, 11b, 11c of the molds 10a, 10b, 10c below the sub-slides 8a, 8b, 8c. .

  If the press working is continued after the initial setting of the hydraulic pressure of each hydraulic cylinder 40, the main slide 7 or each of the main cylinders 7 or each of the hydraulic cylinders 40 may be worn due to wear of the drive system connecting portion such as the plunger 6, the guide rail 27, and the guide member 28. A press pressure eccentric to the sub-slides 8a, 8b, and 8c is applied to some of the hydraulic cylinders 40. If the eccentric press pressure is detected by the transfer press control mechanism 48 via the hydraulic pressure gauge 47 and the pressure is dissociated from the initial set pressure by a predetermined pressure, a warning display or alarm is issued. It becomes possible to take appropriate repair measures before.

  As described above, the press pressure correction device of the transfer press in the above embodiment supports the bed 2 and the lower molds 12a, 12b, 12c attached to the bed 2 and the plurality of molds 10a, 10b, 10c. The bolster 3, the plurality of columnar uprights 4 rising from the end of the bed 2, the crown 5 attached to the top of each upright 4, and supported by the uprights 4 so as to be vertically movable. A main slide 7 that is driven up and down by a plunger 6 of the provided driving mechanism and an upper part on the support wall 25 of the main slide 7 to support the upper molds 11a, 11b, and 11c of the molds 10a, 10b, and 10c, respectively. Applied to transfer press 1 having a plurality of sub-slides 8a, 8b, 8c on which (upper wall 31) is supported In each of the sub-slides 8a, 8b, and 8c, an outer periphery of a lower portion (lower wall 32) that supports the upper molds 11a, 11b, and 11c, and a lower portion of the support wall 25 in the main slide 7 are extended to A plurality of hydraulic cylinders 40 are disposed between the lower surfaces of the lower walls 22 formed at the lower ends of the outer peripheral walls 23 surrounding the outer peripheries of the sub slides 8a, 8b, and 8c. The lower portions of the sub-slides 8a, 8b, and 8c are supported on the outer peripheral wall 23 of the main slide 7.

  According to this configuration, the outer periphery of the lower part supporting the upper molds 11a, 11b, and 11c in each of the sub slides 8a, 8b, and 8c is the outer peripheral wall 23 that surrounds the outer periphery of each of the sub slides 8a, 8b, and 8c in the main slide 7. Input to the main slide 7 via the upper molds 11a, 11b, 11c and the sub slides 8a, 8b, 8c by being supported on the lower surface of the lower wall 22 formed at the lower end via a plurality of hydraulic cylinders 40, respectively. The pressed reaction force is distributed and supported by the support wall 25 and the outer peripheral wall 23 and also has a buffering action due to the hydraulic pressure of the hydraulic cylinder 40. Therefore, the pressing force from the plunger 6 against the main slide 7 As a result, without increasing the press reaction force, the deformation at the center of the main slide 7 where the press reaction force tends to concentrate is suppressed. , Thereby improving the press quality as possible additional sufficient pressing pressure to the central part, can be extended main slide 7 and the mold 10a, 10b, and 10c thus facilities entire lifetime.

  The method for correcting the press pressure of the transfer press 1 in the above embodiment is applied to the above-described transfer press 1, and supports the upper molds 11a, 11b, 11c in the sub-slides 8a, 8b, 8c. A plurality of hydraulic cylinders 40 are respectively provided between the outer periphery of the lower part and the lower end of the outer peripheral wall 23 that extends below the support wall 25 of the main slide 7 and surrounds the outer periphery of each of the sub-slides 8a, 8b, 8c. With the molds 10a, 10b, and 10c removed, load cells 73 are respectively provided at the positions of the molds 10a, 10b, and 10c on the bolster 3 or the sub-slides 8a, 8b, and 8c. And lowering the main slide 7 to a predetermined lower end position and supplying a predetermined hydraulic pressure to each hydraulic cylinder 40. And, wherein as the pressing force applied to each load cell 73 is mutually uniform and proper pressing pressure and adjusts the hydraulic pressure of the falling edge position and the respective hydraulic cylinders 40 of the main slide 7.

  According to this configuration, the lower end position of the main slide 7 and the operating hydraulic pressure of each of the hydraulic cylinders 40 are adjusted so that the press pressures at the positions where the molds 10a, 10b, and 10c are arranged have uniform and appropriate values. By adjusting, without suppressing the pressing force from the plunger 6 against the main slide 7 and hence the press reaction force, the center portion of the main slide 7 where the press reaction force is likely to concentrate is suppressed. In addition, a sufficient press pressure can be applied to improve the press quality, and the life of the main slide 7 and the molds 10a, 10b, 10c and the entire equipment can be extended.

  The configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the spirit of the present invention, including the component configuration, structure, shape, size, number, arrangement, and the like. Needless to say.

It is a front view of the transfer press in the Example of this invention. It is a top view of the principal part of the said transfer press. It is a block diagram of the hydraulic pump mechanism of the said transfer press. It is a perspective view which shows arrangement | positioning of the hydraulic cylinder of the said transfer press. It is a front view equivalent to FIG. 1 which shows the 1st procedure at the time of the initial setting of the working hydraulic pressure of the said hydraulic cylinder. It is a front view equivalent to FIG. 1 which shows the 2nd procedure at the time of the initial setting of the working hydraulic pressure of the said hydraulic cylinder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer press 2 Bed 3 Bolster 4 Upright 5 Crown 6 Plunger 7 Main slide 8a, 8b, 8c Sub slide 23 Outer peripheral wall 25 Support wall 31 Upper wall (upper part)
32 Lower wall (lower part)
40 Hydraulic cylinder 73 Load cell (pressure measuring device)

Claims (2)

A bed, a bolster attached to the bed and supporting a lower mold of the plurality of molds, a plurality of columnar uprights rising from an end of the bed, a crown attached to an upper portion of each upright, The main slide is supported by the upright so that it can be moved up and down and is driven up and down by the plunger of the drive mechanism provided on the crown, and the upper part is supported by the support wall of the main slide to support the upper mold of each mold. In the press pressure correction device of the transfer press comprising a plurality of sub-slides,
A plurality of hydraulic cylinders between the outer periphery of the lower part supporting the upper mold in each sub-slide and the lower end of the outer peripheral wall that extends below the support wall and surrounds the outer periphery of each sub-slide in the main slide Arrange
A press pressure correction device for a transfer press, wherein the lower part of each sub-slide is supported on the outer peripheral wall of the main slide via each hydraulic cylinder. A bed, a bolster attached to the bed and supporting a lower mold of the plurality of molds, a plurality of columnar uprights rising from an end of the bed, a crown attached to an upper portion of each upright, The main slide is supported by the upright so that it can be moved up and down and is driven up and down by the plunger of the drive mechanism provided on the crown, and the upper part is supported by the support wall of the main slide to support the upper mold of each mold. In a method for correcting the press pressure of a transfer press comprising a plurality of sub-slides,
A plurality of hydraulic cylinders between the outer periphery of the lower part supporting the upper mold in each sub-slide and the lower end of the outer peripheral wall that extends below the support wall and surrounds the outer periphery of each sub-slide in the main slide Arrange
With each mold removed, a pressure measuring device is disposed at each mold placement position on the bolster or each sub-slide,
Lowering the main slide to a predetermined lower end position and supplying a predetermined hydraulic pressure to each hydraulic cylinder;
The transfer press characterized in that the lower end position of the main slide and the hydraulic pressure of each hydraulic cylinder are adjusted so that the pressing forces applied to the pressure measuring devices are uniform and appropriate to each other. Press pressure correction method.

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