JP2015188896A - Press device, compressor and factory system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press device capable of generating compressed air as well in addition to press forming without causing deterioration of workability and an increase in power consumption, etc.SOLUTION: A press device (1) comprises: a reciprocating movable die (11); a stationary die (12) which is arranged oppositely to the movable die, and forms a work piece (w) by pressing the work piece between the stationary die (12) and the movable die; and driving means (13) for reciprocating the movable die, and further comprises a compressor (2) which is driven linked with the movable die, and generates compressed air. The compressor comprises, for example: a cylindrical cylinder (20) with a bottom; a piston (21) which reciprocates linked with the movable die in the cylinder; an air intake valve (241) which permits air intake from an outside world to an inner space sectioned by the cylinder and the piston; and a discharge valve (242) which permits discharge of the compressed air from the inner space to a surge tank (25).

Description

  The present invention relates to a compressor that generates compressed gas in conjunction with a movable mold of a press apparatus, a press apparatus that includes the compressor, and a factory system that supplies the compressed gas obtained thereby to the factory.

  A wide variety of machine tools are arranged in the factory, and these machine tools process a workpiece into a desired shape while consuming a large amount of electric power. In particular, the press device reciprocates a heavy metal mold and applies a large processing force to the workpiece near the bottom dead center so as to make the workpiece a desired shape. However, the energy required for processing the workpiece is very small compared to the energy required for the operation of the press device, and the difference energy between them is not utilized effectively, and most of it is dissipated into the atmosphere as thermal energy. .

  It is conceivable to reuse (regenerate) at least a part of the differential energy generated in such a machine tool. For example, the following patent document has a related proposal.

JP 2004-106119 A JP 2011-83782 A

  Patent Document 1 proposes a machine tool that can effectively use the regenerative power generated when the moving body is decelerated for cooling the headstock. Patent Document 2 proposes a die cushion device for a press machine provided with a linear drive device capable of energy regeneration.

  These machines and devices only regenerate a small amount of energy for the purpose of suppressing their own power consumption, and do not develop into energy saving for the whole factory. By the way, there are few proposals for machine tools with energy regeneration in the first place.

  The present invention has been made in view of such circumstances, and without increasing input energy (power consumption), a press device that can be used more effectively than before and a device attached to the press device. It is an object of the present invention to provide a compressor that can perform energy saving and a factory system that can use them to save energy.

  As a result of extensive research and trial and error, the present inventor has made a large surplus that hardly contributes to the processing of the workpiece in the process from the top dead center to the bottom dead center as a result of repeated trial and error. Focusing on the fact that there is energy, I came up with the idea of using this surplus energy to generate the compressed air needed for processing. By developing this idea, the present invention described below has been completed.

<Pressing equipment>
(1) A press apparatus according to the present invention includes a movable die that reciprocates, a fixed die that is disposed to face the movable die and presses a workpiece between the movable die, and the movable die. And a drive unit that reciprocates the compressor, and further includes a compressor that is driven in conjunction with the movable mold to generate compressed gas.

(2) Since the press apparatus of the present invention includes a compressor that operates in conjunction with a movable mold, it can also generate compressed gas (particularly compressed air) concurrently with processing of the workpiece. A large amount of energy is usually input to a press device to drive a large and heavy metal mold (movable mold) and its support (slider, etc.). It is only a part of the input energy. In other words, most of the input energy is surplus energy. According to the press device of the present invention, since the compressor is operated using the surplus energy effectively, compressed gas can be generated without substantially increasing the input energy (power consumption).

  Such compressed gas may be consumed in the press apparatus, supplied to other machine tools and processing machines, or supplied to other work places in the factory using piping. In any case, energy (power consumption) to be input to a dedicated compressor that supplies compressed gas to various parts of the factory can be reduced.

  In addition, when compressed gas is generated in units of press devices, piping for supplying compressed gas to the press device or its surrounding machine tools and work locations can be shortened and simplified, and as a result it is stretched around the factory. It may be possible to shorten, simplify, or even eliminate the air piping that has been used.

  In addition, as the case where the press device itself provided with the compressor consumes the compressed gas generated by the compressor, it adheres to the mold surface or the periphery of the mold (movable mold or fixed mold), the processed product after pressing, etc. This is the case of pressing while removing chips, chips and the like with an air stream (that is, blowing them off).

(3) The press device consumes a large amount of energy when the heavy movable mold is returned from the bottom dead center to the top dead center. In the process of returning from the bottom dead center to the top dead center, it is not preferable to further apply a driving load of the compressor because it increases the input energy (power consumption) to the press device.

  On the other hand, in the forward movement process where the movable type moves from top dead center to bottom dead center (immediately before), no large energy is required for moving the movable type, and the energy consumed for processing the workpiece is bottom dead center. Limited to neighborhood. This forward movement process is a process in which a large potential energy is released. Even if the compressor is driven in conjunction with the movable type, the power consumption of the press device is not substantially increased, and the work material It is possible to generate compressed gas with almost no influence on workability. Therefore, it is preferable that the compressor according to the present invention performs a compression operation that requires a corresponding driving force when the movable type moves from the top dead center to the bottom dead center. In the vicinity of the bottom dead center where the workpiece is substantially processed, the compressed gas is discharged, so that the internal pressure of the compression chamber becomes excessive and the workability is hardly adversely affected.

  The type of the compressor according to the present invention is not limited. For example, if a movable reciprocating motion is converted into a rotational motion using a gear train such as a rack and pinion, a scroll type compressor can also be used. Further, by interposing a reduction gear, the compressor can be operated at an appropriate rotational speed, torque, or the like. However, if the compressor is a reciprocating type, it can be easily linked to a reciprocating movable type, and the excess energy of the press device can be efficiently regenerated to generate compressed gas. Therefore, a compressor according to the present invention includes a bottomed cylindrical cylinder, a piston that is fitted and inserted from the opening side of the cylinder, and reciprocates in conjunction with the movable mold, and the cylinder and the piston. It is preferable to include an intake valve that allows intake into the inner space partitioned by the above and a discharge valve that allows discharge of the compressed gas from the inner space. Note that it is preferable to provide a surge tank (storage tank) that stores compressed gas discharged from the compressor because the compressed gas can be stably supplied.

《Compressor》
The present invention can be grasped not only as the press device described above but also as a compressor attached to the press device. That is, the present invention includes a movable mold that reciprocates, a fixed mold that is disposed opposite to the movable mold and that is formed by pressing a workpiece between the movable mold, and a drive unit that reciprocates the movable mold. It is attached to the press apparatus provided with this, The compressor characterized by producing | generating compressed gas by interlocking | operating with this movable mold | type may be sufficient.

  The compressor of the present invention may be installed in the press device from the beginning, or may be retrofitted to an existing press device. In any case, it is only necessary to interlock with a reciprocating movable mold, so that the mounting is easy. In addition, if the type, capacity, and the like of the compressor are appropriately selected, it is easy to generate compressed gas and adjust the pressure.

《Factory system》
Furthermore, this invention can be grasped | ascertained also as a factory system characterized by including the press apparatus mentioned above and piping which guide | induces the said compressed gas produced | generated with this press apparatus to the other place in a factory.

  According to the factory system of the present invention, the compressed gas generated by the press device can be supplied to other machine tools and other work locations through the piping. As a result, it is possible to shorten and simplify the air piping and the like in the factory, and it is possible to reduce the load or power consumption of the existing air compressor, and to eliminate it. Therefore, according to the factory system of the present invention, not only energy saving in the factory but also simplification of factory equipment (air compressor, piping, etc.) can be realized.

<Others>
The press device referred to in this specification may be of any type as long as a workpiece is formed by a movable mold and a fixed mold that reciprocate. For example, in addition to a forging machine and a sheet metal press machine, a compression molding machine provided with a movable punch and a fixed die may be used.

  Regardless of the reciprocating direction of the press device, if it is a vertical press device placed in the vertical direction, the movable type is effective in driving the compressor with potential energy from the top dead center to the bottom dead center. It is available and preferable. In this case, the movable mold can be rephrased as the upper mold and the fixed mold as the lower mold.

  In the present invention, the bottom dead center is a position where the movable mold is moved to the maximum side of the fixed mold, and the top dead center is a position where the movable mold is moved to the maximum side of the fixed mold. The fixed mold according to the present invention means a mold that is not driven by the driving means, and does not mean a mold that does not move at all. For example, a fixed mold referred to in the present invention is a machine that is moved by being pressed by a movable mold, such as a blank holder with a die cushion.

  The driving means of the press device may be mechanically driven or hydraulically driven as long as it does not take any kind and moves at least the movable die from the bottom dead center to the top dead center. In addition, the compressed gas referred to in this specification is typically compressed air, but depending on the type of work in the factory, etc., a gas other than air (for example, an inert gas such as nitrogen) may be compressed. Good.

It is explanatory drawing which shows one Embodiment of the press apparatus of this invention.

"Constitution"
An outline of a press apparatus 1 according to an embodiment of the present invention is shown in FIG. The press apparatus 1 includes a base 10, a lower mold 12 (fixed mold) fixed on the base 10, and an upper mold 11 (movable mold) arranged to face the lower mold 12 (fixed mold). And a slider 13 (driving means) for moving the upper mold 11 up and down (reciprocating), and an air compressor 2 (compressor) driven by the vertical movement of the upper mold 11. The reciprocating motion of the slider 13 is performed by a drive motor and a mechanism (not shown) built in the housing 14.

  The air compressor 2 includes a bottomed cylindrical cylinder 20 fixed on the base 10, a disk-like piston 21 fitted and inserted from the opening 201 side of the cylinder 20, and an upward extension from the center of the piston 21. The connecting rod 22, the drive stay 23 having one end connected to the connecting rod 22 and the other end connected to the side end 111 of the upper mold 11, and the intake valve 241 and the discharge valve attached to the bottom side of the cylinder 20. 242 and an air tank 25 (surge tank). The intake valve 241 is a one-way valve that sucks outside air (air) into the cylinder 20 only when the internal pressure of the cylinder 20 is lower than the atmospheric pressure. The discharge valve 242 is a one-way valve that discharges compressed air (compressed gas) in the cylinder 20 to the air tank 25 only when the internal pressure of the cylinder 20 is higher than the internal pressure of the air tank 25.

<Action>
When the operator operates the press device 1, the upper die 11 starts to descend from the top dead center (upper end), and the workpiece w (workpiece) placed on the lower die 12 near the bottom dead center. Is pressed with the lower mold 12 and pressed into a desired shape. In synchronization with the lowering of the upper mold 11, the drive stay 23 and the connecting rod 22 are lowered, and the piston 21 connected thereto is also lowered in the cylinder 20. As a result, the air in the compression chamber (inner space) formed by the cylinder 20 and the piston 21 is compressed, and the compressed air is discharged from the discharge valve 242 to the air tank 25 as the internal pressure of the compressed air increases.

  When the upper die 11 reaches the bottom dead center and completes the press forming of the workpiece w, the upper die 11 starts to rise toward the top dead center. In synchronization with the raising of the upper mold 11, the drive stay 23 and the connecting rod 22 are also raised, and the piston 21 connected thereto is also raised in the cylinder 20. When the pressure in the cylinder 20 becomes negative, air is sucked into the cylinder 20 from the atmosphere through the intake valve 241. Thereafter, when the upper mold 11 passes through the top dead center, the above-described compression operation is repeated again.

  In this way, every time the upper mold 11 moves up and down, the piston 21 moves up and down in the cylinder 20 in synchronization therewith, and the suction, compression and discharge of air are repeated, and the compressed air is temporarily stored in the air tank 25. Is done. The compressed air in the air tank 25 is supplied to the periphery of the lower mold 12 of the press device 1 through an air pipe (not shown) connected to the air tank 25, and the chips adhering to the periphery of the lower mold 12 and the press-molded product are compressed. Removed by air.

  Incidentally, when the upper mold 11 press-forms the workpiece w near the bottom dead center, the compressed air in the cylinder 20 is discharged from the discharge valve 242 to the air tank 25, so that the internal pressure of the cylinder 20 does not become excessive. Therefore, the generation of compressed air by the air compressor 2 does not substantially affect the workability of the press device 1. In other words, the compressed air is generated by the air compressor 2 during the process in which the upper die 11 is not involved in processing and is hardly doing work (from the top dead center to immediately before the bottom dead center). Therefore, according to the press apparatus 1 of a present Example, compressed air can be produced | generated, without causing deterioration of workability, increase in power consumption, etc. If this compressed air is used effectively, the load of the dedicated air compressor installed in the factory can be reduced, and the power consumption in the factory can be reduced, and the whole factory can greatly save energy.

1 Press device 2 Air compressor (compressor)
11 Upper mold (movable type)
12 Lower mold (fixed mold)
20 cylinder 21 piston 25 air tank (surge tank)

Claims (6)

Reciprocating movable type,
A fixed mold that is disposed to face the movable mold and molds by pressing a workpiece between the movable mold;
A pressing device comprising driving means for reciprocating the movable mold,
The press apparatus further comprises a compressor that is driven in conjunction with the movable mold to generate compressed gas.   The press apparatus according to claim 1, wherein the compressor performs a compression operation when the movable mold moves from a top dead center to a bottom dead center. The compressor includes a bottomed cylindrical cylinder,
A piston that is inserted from the opening side of the cylinder and reciprocates in conjunction with the movable mold in the cylinder;
An intake valve that allows intake into the internal space defined by the cylinder and the piston;
A discharge valve that allows the compressed gas to be discharged from the inner space;
A press apparatus according to claim 1 or 2.   Furthermore, the press apparatus in any one of Claims 1-3 provided with the surge tank which stores the said compressed gas discharged from the said compressor. A press device according to any one of claims 1 to 4,
Piping for guiding the compressed gas generated by the pressing device to other places in the factory;
A factory system characterized by comprising:   A press apparatus comprising: a movable mold that reciprocates; a fixed mold that is disposed opposite to the movable mold and that is formed by pressing a workpiece between the movable mold; and a driving unit that reciprocates the movable mold. A compressor mounted and driven in conjunction with the movable mold to generate compressed gas.

Images