JPH059799U - Press machine - Google Patents

Abstract

(57) [Abstract] [Purpose] In a press machine, when performing press work of different shapes at a plurality of locations at the same time, the posture changes of the movable ram and the fixed ram are suppressed as much as possible. [Structure] A plurality of fluid pressure actuators are arranged between a movable ram and a stripper, and the pressure of the working fluid supplied to each fluid pressure actuator is adjusted for each of these fluid pressure actuators. A pressure control means is provided in series to uniformize the reaction force acting on the movable ram during molding.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a press machine, and in particular, includes a plurality of punches and a plurality of dies. Yes, these multiple punches and dies allow multiple presses on the material at the same time. The present invention relates to a press machine that is designed to perform.

[0002]

[Prior art]

  Conventionally, as an example of a press machine, one having a structure shown in FIG. 1 is known.

[0003]   The press machine 1 includes a fixed ram 3 attached to a base body 2 and the fixed ram 3. Fixed to the fixed ram 3 and a movable ram 4 provided so as to be able to approach and separate from , A die holder 5 to which a plurality of dies (not shown) are attached, and the movable ram A punch holder 6 to which a plurality of punches (not shown) are attached and which are fixed to A stripper attached to the movable ram 4 so as to be relatively movable in the movable direction. -7 and the movable ram 4 are brought closer to the fixed ram 3, the stripper Fixing the movable ram 4 and the spring 8 that presses the 7 into the die holder 5 It is configured to include a pressurizing unit 9 that presses and moves toward the ram 3.

[0004]   Then, in the press machine 1 having such a configuration, the die holder 5 is After the plate-shaped material W is positioned and placed, the movable ram 4 is fixed by the pressing means 9. By moving it toward the movable ram 4 by moving it toward the movable ram 4. A plurality of punches of the chuck holder 6 and a plurality of daws attached to the fixed ram 3. Pressing (eg punching) multiple points of the material with the chair holder 5. Processing).

[0005]

[Problems to be solved by the device]

  By the way, as described above, in the case where a plurality of press workings are simultaneously performed, as shown in FIG. As shown in, if the individual press shapes A (A1 to A4) are different, The processing pressure in the movable ram 4 will be different due to the reaction force of this pressing force. It is pushed up with different force depending on the construction position, which causes the movable ram 4 to As indicated by the line, a phenomenon occurs in which the fixed ram 3 is tilted.

[0006]   When the movable ram 4 is tilted in this manner, it is fixed to the movable ram 4. Attached to this punch holder 6 and this punch holder 6 Each punch is tilted as well, so that each of these punches is tilted with respect to the die. It will be inserted in a slanted state, which may cause galling or uneven wear of the punch. It

[0007]   Therefore, in order to deal with such a problem, the punch holder 6 is conventionally used. Adjust the set load of multiple springs 8 provided between the stripper and the stripper 7. By doing so, it has been attempted to correct the inclination described above.

[0008]   That is, when the shape of the material to be processed is known, it acts on the punch holder 6. Since the distribution of the reaction force generated by the It acts on the punch holder 6 by applying a pressure difference between the punch holder 6 and the high The reaction force is made uniform to prevent the inclination.

[0009]   However, even with such a means, there are a large number of loaded loads of springs 8. The weight has to be adjusted individually, and the task is to replace the dies and punches Work is complicated because it has to be performed every time the press shape is changed. It causes a new problem that the setup time is prolonged. U

[0010]   Therefore, in the past, it has been desired to deal with these problems. Is to solve the problems that remain in the past.

[0011]

[Means for Solving the Problems]   The present invention is a press capable of effectively solving the above-mentioned problems remaining in the related art. The press machine according to claim 1, which is intended to provide a processing machine, is mounted on a substrate. Fixed ram and movable ram that can be moved toward and away from the fixed ram And a die holder fixed to the fixed ram and having a plurality of dies attached A punch holder fixed to the movable ram and having a plurality of punches attached thereto; A stripper attached to the movable ram so as to be movable relative to the movable ram. And when the movable ram approaches the fixed ram, the stripper A spring that presses against the chair holder and presses the movable ram toward the fixed ram. In a press machine equipped with a moving pressurizing means, the movable ram and strike Plural fluid pressure actuators are installed between the ripper and each of these fluid pressure actuators. The pressure of the working fluid supplied to each fluid pressure actuator is applied to the actuator. , That the pressure control means for adjusting each fluid pressure actuator is connected in series. Characterize.

[0012]   The press working machine according to claim 2 further comprises a fixed ram mounted on the base body, Fixed ram and movable ram that can be moved closer to and separated from the fixed ram Fixed to the movable ram and the die holder with multiple dies attached. Punch holder with multiple punches attached, and its movable The movable ram is fixed to the stripper attached so that it can move relative to each other. When the ram is approached, press the stripper into pressure contact with the die holder. A spring and a pressing means for pressing the movable ram toward the fixed ram. In a press machine provided, between the punch holder and the stripper, , Multiple fluid pressure actuators are installed, and each of these fluid pressure actuators The pressure of the working fluid supplied to each fluid pressure actuator. It is characterized in that a pressure control means for adjusting each user is connected in series.

[0013]   Further, the press machine according to claim 3 is the press according to claim 1 or claim 2. In the processing machine, the pressure control means is the pressure provided for each fluid pressure actuator. The force adjustment valve and the adjustment pressure signal is output to each of these pressure adjustment valves, and the die Immediately after the press work by the above is completed, the pressure of each fluid pressure actuator is released. It is composed of a controller that outputs a decompression signal to each pressure control valve It is characterized by

[0014]

[Action]

  In the press machine according to claim 1 of the present invention, according to the press shape of the material, , The pressure of the working fluid supplied to each fluid pressure actuator is adjusted by the pressure adjusting means. Are individually adjusted to correct the reaction force that acts on the movable ram during press working. It is made uniform regardless of the position.

[0015]   Further, in the press working machine according to claim 2, depending on the press shape of the material, The pressure of the working fluid supplied to each fluid pressure actuator is It is individually adjusted to compensate for the reaction force that acts on the punch holder during press working. It is made uniform regardless of the processing position.

[0016]   Further, in the press machine according to claim 3, the controller controls the pressure. A pressure signal corresponding to the press shape of the material is output to the control valve to activate each fluid pressure. The pressure of the working fluid supplied to the user is regulated, which allows the movable ram to move. The reaction force to the punch or punch holder is made uniform regardless of the machining position, and the -Less machining is completed and the fluid pressure actuator is activated when the reaction force is removed during machining. Therefore, the corrected reaction force is removed.

[0017]   As a result, the correction force of the fluid pressure actuator after machining is The non-uniformity of the reaction force on the movable ram or punch holder is eliminated.

[0018]

【Example】

  An embodiment of the present invention will be described below with reference to FIG. The following explanation In the description, the same parts as those in FIGS. 1 and 3 are designated by the same reference numerals to simplify the description. It

[0019]   The press machine 10 according to this embodiment includes a fixed ram 3 attached to a base body 2. , The movable ram 4 provided so as to be able to approach and separate from the fixed ram 3, A die holder 5 to which a plurality of dies (not shown) are fixed A punch ho that is fixed to the movable ram 4 and has a plurality of punches (not shown) attached thereto. Attached to the rudder 6 and the movable ram 4 so as to be relatively movable along the movable direction. When the movable strip ram 4 and the movable ram 4 are brought close to the fixed ram 3, A spring 8 for pressing the stripper 7 against the die holder 5; A pressing means 9 for pressing and moving the moving ram 4 toward the fixed ram 3, and the movable ram 4. A plurality of fluid pressure actuators 11 arranged between the stripper 7 and These fluid pressure actuators 11 are connected to each other, and each fluid pressure actuator 11 To adjust the pressure of the working fluid supplied to each fluid pressure actuator 11. It has a basic configuration including the force control means 12.

[0020]   Next, these will be described in detail. In this embodiment, a hydraulic cylinder is used, and an oil is used as its working fluid. Is used.

[0021]   The fluid pressure actuator 11 is connected to the four corners of the stripper 7. It is provided at four locations (only two locations are shown in Fig. 4) to accommodate each fluid. The pressure actuator 11 includes a hydraulic chamber 13 formed in the movable ram 4 and A piston 14 slidably mounted in the pressure chamber 13 in a liquid-tight state, and the piston 14 Is integrally attached to the movable ram 4 and the punch holder 6, and The punch holder 6 is movably penetrated and is provided outside the punch holder 6. It is constituted by a piston rod 15 fixed to the par 7.

[0022]   Further, inside the movable ram 4, oil passages 16 communicating with the hydraulic chamber 13 are provided. The fluid pressure actuator 11 is provided for each of the pressures, and the pressure is provided outside the movable ram 4. It is connected to the force adjusting means 12.

[0023]   The pressure adjusting means 12 is connected to the oil passage 16 as shown in FIG. The oil drain pipes 17, the pressure adjusting valves 18 attached to these oil supply and drain pipes 17, An oil pump 19 for supplying hydraulic oil to the pressure regulating valve 18 and the pressure regulating valve 1 8 and the oil drain pipes 20 and the oil pump 19 To the oil tank 21 communicating with the pressure adjusting valve 18 Immediately after the press work is completed (that is, in the punching process) Immediately after the material W is punched out), the oil supply and drain pipe 17 and the oil drain pipe 20 are connected to each other. In order to remove the pressure of each fluid pressure actuator 11, each pressure regulating valve 18 And a controller 22 that outputs a depressurization signal to.

[0024]   Then, the controller 22 is provided with a pattern of press working for the material W. Information of the reaction force distribution according to is stored in advance.

[0025]   Next, the operation of the present embodiment configured as described above will be described. After the material W is positioned and placed on the die holder 5, the pressing means 9 is operated. As a result, the movable ram 4 is fixed together with the punch holder 6 and the stripper 7. Moved towards ram 3.

[0026]   With such movement, the stripper 7 keeps a predetermined distance from the punch holder 6. It is moved toward the die holder 5 while keeping it separated, The material W is brought into contact with the placed material W, and the material W It is sandwiched between the dar 5 and the stripper 7.

[0027]   From this, if the above-mentioned movement is continued, the die holder 5 and the stripper are The clamping force of the material W by 7 and 7 is increased, and the material W is firmly fixed.

[0028]   Furthermore, if the movable ram 4 continues to move, the stripper 7 will move to the die holder. 5, the movement of the movable ram 4 and the punch holder is stopped because the movement of the ram 4 is stopped. The dart 6 is moved against the elastic force of each spring 8, and the punch holder 6 is moved. Move the punches attached to the To be

[0029]   By moving the movable ram 4 further than this, the punch and the die are Pressing of the material W is started by, but as shown in FIG. If the processed shape is different, The distribution of the reaction force on the chiholder 6 and the movable ram 4 becomes uneven.

[0030]   Here, the controller 22 responds to the pattern of the press working for the material W. Since the information of the reaction force distribution is stored in advance, Then, in order to make this reaction force distribution uniform, an adjustment signal is output to each pressure adjustment valve 18, The hydraulic oil having different regulated pressures is supplied to the fluid pressure actuator 11. This As a result, the apparent press pressure is made uniform, and the movable ram 4 and punch The reaction force on the holder 6 is also made uniform.

[0031]   Therefore, by moving the movable ram 4 further than this, the punch Although pressing with a die is performed, as described above, the punch holder 5 Since the reaction force against it is uniform regardless of the processing position, the punch can be used as a die. On the other hand, the press working is performed in a state where it is held in a regular posture.

[0032]   On the other hand, immediately after the press working, in other words, the processing from the material W is performed. When the reaction force disappears, the pressure is released from the controller 22 to the pressure control valve 18. A pressure signal is output and the oil supply / drain pipe 17 and the oil drain pipe 20 are brought into communication with each other.

[0033]   Along with this, the pressing force of each fluid pressure actuator 11 becomes zero, and the movable ram 4 The reaction force to the punch holder 6 or the punch holder 6 is the elastic force of only the plurality of springs 8. Since the elastic force of these springs 8 is set to a constant value, press work Even afterward, the movable ram 4 and the fixed ram 3 are held in a parallel state, and as a result, The punch and dice can also be moved relative to each other while maintaining their normal posture.

[0034]   As described above, according to the press working machine 10 of the present embodiment, the punch and the die are Is always maintained in a normal posture, and galling and uneven wear are suppressed, improving durability. It

[0035]   Also, for various types of processing, the correction pressure by the fluid pressure actuator 11 By storing the pattern of as a data, the pressure can be controlled even when the machining form is changed. It can be dealt with easily only by changing the control pattern of the means. Simplification and speedup are achieved.

[0036]   It should be noted that the shapes, dimensions, etc., of the respective constituent members shown in the above embodiment are examples, and Various changes can be made based on the requirements.

[0037]   For example, in the above embodiment, a hydraulic cylinder is used as the fluid pressure actuator. However, an actuator using gas as a working fluid may be used instead of this. Good.

[0038]   Also, an example using four fluid pressure actuators was shown. The pressure can be increased or decreased according to the form, and the individual pressure settings can be adjusted according to the movement of the internal piston. Set the pressure in anticipation of the pressure rise in the force chamber, or use the relief valve to set the pressure constantly. It is also possible to hold it at.

[0039]   Furthermore, be sure to perform depressurization operation of the fluid pressure actuator immediately after press molding. Is not necessary either. The point is to make the posture of the punch and die in the normal state during pressing. You just have to keep it.

[0040]   Furthermore, the fluid pressure actuator includes a stripper and a punch holder. It may be provided between the above and the above. The same effect as that of the embodiment can be obtained.

[0041]

[Effect of device]

  As described above, the press machine according to claim 1 and claim 2 of the present invention. According to this, when pressing different shapes at multiple locations simultaneously Also, by minimizing the change in posture between the movable ram and the fixed ram, During punching, hold the punch and die in a normal posture and bite both. And uneven wear can be suppressed, and durability can be significantly improved.

[0042]   Also, for various types of processing, the correction pressure by the fluid pressure actuator 11 By storing the pattern of as a data, the pressure can be controlled even when the machining form is changed. It can be dealt with easily only by changing the control pattern of the means. It is possible to simplify and speed up.

[Brief description of drawings]

FIG. 1 is a front view for schematically explaining a press molding machine.

FIG. 2 is a plan view showing an example of composite press working on a material.

FIG. 3 is an enlarged view for explaining the behavior of a movable ram during conventional composite press working.

FIG. 4 is a partially cutaway enlarged view showing a main part of the present invention.

[Explanation of symbols]

2 base 3 fixed ram 4 movable ram 5 dice holder 6 punch holders 7 strippers 8 springs 9 Pressurizing means 10 Press machine 11 Fluid pressure actuator 12 Pressure control means 18 Pressure regulating valve 22 Controller

Claims (3)

[Scope of utility model registration request] 1. A fixed ram attached to a base body, a movable ram provided so as to be able to approach and separate from the fixed ram, a die holder fixed to the fixed ram and having a plurality of dies attached thereto, A punch holder fixed to the movable ram and having a plurality of punches attached thereto, a stripper attached to the movable ram so as to be relatively movable along its movable direction, and when the movable ram is brought close to the fixed ram, In a press working machine comprising a spring for pressing the stripper into pressure contact with the die holder, and a pressurizing means for pressing the movable ram toward the fixed ram, between the movable ram and the stripper,
Plural fluid pressure actuators are provided, and each of these fluid pressure actuators is provided with pressure control means for adjusting the pressure of the working fluid supplied to each fluid pressure actuator for each fluid pressure actuator. Pressing machine characterized by 2. A fixed ram attached to a base body, a movable ram provided so as to be able to approach and separate from the fixed ram, a die holder fixed to the fixed ram and having a plurality of dies attached thereto, A punch holder fixed to the movable ram and having a plurality of punches attached thereto, a stripper attached to the movable ram so as to be relatively movable along its movable direction, and when the movable ram is brought close to the fixed ram, In a press machine comprising a spring for pressing the stripper into pressure contact with the die holder and a pressurizing means for pressing and moving the movable ram toward a fixed ram, a plurality of fluids are provided between the punch holder and the stripper. A pressure actuator is provided, and each of these fluid pressure actuators is supplied to each fluid pressure actuator. A press machine characterized in that pressure control means for adjusting the fluid pressure for each fluid pressure actuator is connected in series. 3. The pressure control means outputs a pressure adjusting valve provided for each fluid pressure actuator and an adjusting pressure signal to each of these pressure adjusting valves, and immediately after completion of press working by a die, The press working machine according to claim 1 or 2, further comprising: a controller that outputs a depressurization signal to each pressure control valve to remove the pressure of each fluid pressure actuator.