JPH01205899A - Press working device - Google Patents

Abstract

PURPOSE:To miniaturize a device and to execute correct plastic working by interposing a freely expandable air bag body between a pressing plate and the fixed wall of the upper part thereof and composing it freely pressably and descendably via it. CONSTITUTION:When a pressing plate 17 is descended by press-fitting an air or the pressurizing fluid contg. the air into an air bag 21, the moving plate 7 of a die located at the lower part thereof is descended and worked with a plastic deforming power being applied on the material to be worked of be tween a punch 9 and die 8. On the other hand, when the pressure of a air is discharged from the air bag 21, the pressing plate 17 is ascended together with the moving plate 7 by the energizing force of a spring 6 and returned to a working awaiting state. The structure of the device is thus simplified and can be miniaturized and a correct plastic working can be done.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a press apparatus that applies plastic deformation to bar-shaped or plate-shaped metals or synthetic resins, such as shearing process to aluminum alloy bar materials for building materials.

[Prior Art] Conventionally, as this type of press device, a single-action crank press device, a simple press device such as the one disclosed in Japanese Utility Model Publication No. 56-26948, or a press device in which these are arranged in parallel according to the workpiece are used. A mold was installed in the mold to perform various plastic deformation processes such as punching desired holes and cutting and removing parts.

[Problems to be Solved by the Invention] However, as is well known, in this type of conventional press device, the press device itself is equipped with a mold and an eccentric cam that drives the mold. Due to its structure, it had to be large, and when it was installed, it required a large space of 1,000 cubic meters.

The present invention has been made in view of the drawbacks of conventional press devices of this type, and can be made smaller and lighter.

It is an object of the present invention to provide a new press device that can save space for installation and can be relatively easily carried and moved as needed.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a pressing device that directly presses down the movable plate of the mold on the mold, and a separate drive source for this pressing device. In other words, the present invention provides, in claim 1, an air bag body which can be expanded and contracted by press-in and discharge of compressed air, interposed between a press plate that is installed to be able to rise and fall freely and a fixed wall above the pressure plate. At the same time, the pressing device is arranged on the processing mold, and when the air bag body is expanded, the pressing plate is lowered, so that the mold movable plate equipped with the punch can be directly pressed and lowered. In Paragraph 2 of the same, in place of the air bag body which can be expanded and contracted by press-in and discharge of compressed air, a fluid which can be expanded and contracted by press-in and discharge of pressurized liquid fluid is used. The bag is configured to include a bag body, and in claim 3,
A press plate that can be raised and lowered inside a cylindrical case is slid directly or indirectly against the inner wall of the case to form a press device in which a pressurized fluid injection section for air or liquid is provided between the case top plate and the press plate. In addition, the pressing device is disposed on the mold, and by lowering the pressing plate when pressurizing the fluid press-in part, a mold movable plate equipped with a punch can be directly pressed and lowered. Further, in claim 4, each of the pressing devices is an independently separable unit, and the unit is removably arranged and fixed to a mold, and further, in claim 5,
In claim 6, where each of the pressing devices described above is integrally or fixedly disposed on the mold frame, in claim 6, the pressing devices other than the medium temperature item 4 are placed and fixed on the posts of the mold frame. Each of the embodiments is configured as a set of devices.

[Function] In the press device of the present invention, compressed air or a pressurized fluid containing air from a separate near compressor or a drive source such as a tank equipped with a motor-driven pump is supplied to the air of the press device. By press-fitting into the bag, fluid bag, or pressurized fluid inlet, the press plate in the press device is lowered, and this press plate directly pushes down the movable plate of the mold below it, which acts as a punch. Plastic deformation force such as shear force is applied to the workpiece between the dies to process it.

[Example] The present invention will be further described below with reference to drawings showing examples. Reference numeral 1 denotes a press device, and this press device 1 includes a mold 2 and a press device IO.

The mold 2 is of the same shape as the mold installed and used in the conventional press equipment, and in other words, the mold 2 has bosses 4 erected and fixed at the four corners of the lower fixed plate 3.
A mold frame 5 consists of a mold frame 5, and a movable plate 7 is provided above the frame 5, which is held in an upwardly biased state by penetrating each post 4 by a spring 6. The movable plate 7 is equipped with a die 8 fixed on a flat surface and a punch 9 protruding downward from the lower surface of the movable plate 7, and the movable plate 7 resists the upward biasing force of the spring 6 due to the pressing force from above. The punch 9 is then lowered, and the punch 9 is fitted into the die 8, so that a partial punch hole can be formed in the composite material inserted therebetween.

On the other hand, the pressing device tlO is inserted into a box-shaped case 11 in which a top plate 12, a bottom plate 13 made of thick-walled steel plates, and a side plate 14 between these are fixed with a por)-15. It includes a pressing plate 17 and an air bag 21.

The bottom plate 13 of the case 11 is placed on the upper end surface of the four same-length bosses 4 of the mold 2, and the bolts 16 from the inside of the case 11 are attached to the bottom plate 13 of the case 11. and a mold frame 5 are integrally fixed and arranged.

The pressing plate 17 is made of a thick steel plate and is configured to be slightly smaller than the inner dimension of the case 11 so as to be slidably guided on each of the inner walls of the four circumferential side plates 14 of the case 11. It is installed so that it can be raised and lowered freely.

The pressing plate 17 is provided with four pressing legs 18 integrally formed on the bottom surface of the pressing plate 17, which are formed of four pieces on the front, rear, left and right sides, and each of the integral pressing legs 18 corresponds to the bottom plate 13 of the case 11. Each of the pressing legs 18-- is capable of protruding and retracting downward through each through-hole 19-- bored at a position.
* is in contact with the movable plate 7 of the mold 2 at four locations on the upper surface thereof.

In addition, the air bag 21 is made of stretchable rubber, synthetic resin, or the like, and is made into a relatively thick, hollow, wide, and flat shape, for example, like a water pillow, so that its shape also has expandability. The bag body is airtight and has a pressure port 22 at one end thereof, and the pressure port 22 is fixed to a perforation 20 provided in the side plate 14 of the case 11 in an overlapping manner. A hose 28 from a near compressor 27 separately provided outside is connected via the pressure inlet 22. This air bag body 21 includes a press plate 17 that can be raised and lowered of the case 11, and a top plate 12 that is a fixed wall above the press plate 17.
The air bag 21 is disposed between the lower surfaces of the air bag 21 and is expandable and contractable so that it expands when compressed air is forced into the air bag 21 from the near compressor 27 and contracts when the compressed air is discharged.

In this way, in the press apparatus 11, for example, when the workpiece is an aluminum alloy mold material, for example, 6 k
When compressed air of g/c rn' is injected into the air bag body 21 to expand it and press the press plate 17 on its upper surface, the press plate 17 descends.
The movable plate 7 of the mold 2 that the pressing legs 18 are in contact with is directly pressed down against the biasing force of the spring 6 that holds it upward, and the punch 9 is moved to the die 8. On the other hand, if the compressed air pressure is discharged from the air bag 21 by operating the near compressor 27 or opening a valve (not shown) provided on the connecting hose 28, the above-mentioned Spring 6...
The biasing force of * acts, and the pressing plate 17 rises together with the movable plate 7, returning to the state of the special processing machine.

By the way, by omitting the illustration or by replacing the air bag body 21 with a fluid bag body made of a watertight waterproof material, liquids such as water and oil can be stored in the tank of the liquid. The other parts can be constructed in the same manner as above by press-fitting the liquid into this via a motor-driven pump, but in this case, the liquid is discharged from the fluid bag by rotating the motor in the opposite direction and pulling it back into the tank. It is desirable and economical to do so.

What is shown in FIG. 4 is that the space surrounded by the top plate 12, side plates 14, and press plate 17 of the case 11 is directly connected to the compressed air or the motor 30 without using the bag body of the above two examples. The pressing device IO is configured as a pressurized fluid press-in part 23 for liquid from a tank 31 pressurized by a pump 29 driven by the press plate 1.
7 is movable up and down within the case 11, which must be cylindrical, so an airtight material or watertight material 24 is placed between each inner wall of the side plate 14 of the case 11 over its four circumferences. These are arranged so that the press plate 17 indirectly slides closely against each inner wall. Since the rest remains unchanged, the same symbols will be used and the explanation thereof will be omitted.

On the other hand, FIG. 5 shows an example in which the pressing device IO is configured as an independent and separable unit, and in this case,
The mold 2 has the front and back sides open through which the workpiece material enters and exits, and is installed in a space defined by L-shaped fixed frames 25 and 25 made of thick steel plates on both the left and right sides, and is mounted as a unit on the left and right sides. The pressing device R1O is mounted, and the side wall 14.14 of the case 11 is fixed to the side wall 14.14 of the case 11 at the contact portion with the fixing frame 25.25 with bolts 26. It can be installed and removed without disassembling it.

Similarly, since the rest remains the same, duplicate explanations will be omitted by using the same symbols.

Notwithstanding what has been shown above, in carrying out the present invention, the case should be constructed such that non-perforated or mesh-like plates for holding the bag body are stretched over the frame at necessary locations, and the pressing plate should be shaped like a downward step. A rectangular or circular hole is formed in the bottom plate to allow the movable plate to press down, or instead of the bottom plate, for example, a pair of left and right pressing plate stops are formed to define the limit of its descent. A guide groove or protrusion for guiding the pressure plate up and down shall be installed. When forming the pressurized fluid injection part, the dimensional accuracy of the case and the pressure plate shall be maintained without using airtight material etc. By maintaining a high structure, they can be made to slide directly and closely against each other.For constructing the bag, a composite material is used, or for making it expandable and contractible.1 For example, by making the sides into a bellows shape, the material can be expanded and contracted. In addition to or in place of the expandability due to the nature or shape, the fixing piece extends laterally from the post of the mold frame to allow for structural expansion and contraction of the mold and the pressing device in a removable manner. On the other hand, it is also possible to fix the pressing device using bolts or bolt nuts.

In this way, the embodiment of the present invention may be freely selected, regardless of its specific shape, structure, material, installation of additional parts, means of fixing these, etc., as long as it does not go against the gist of the invention shown in the above claims. However, there is no need to limit it to the above example.

[Effects of the Invention] As indicated in each claim, the present invention is formed by disposing and fixing a pressing device integrally or fixedly on a mold, or as a removably detachable unit. This can be connected to a separate drive source, and the press device itself can be made extremely compact and lightweight to suit the workpiece.

Therefore, the installation space is only as large as the conventional storage space for molds of the same type plus the space necessary for work, resulting in a significant space saving (for example, in the case of aluminum alloy bar material, the conventional press equipment It is possible to achieve this by requiring only about 1/4 of the installation space compared to the previous year. Moreover, since the press apparatus of the present invention is smaller and lighter, the required number of press apparatuses of the present invention can be installed horizontally and vertically in steps on, for example, a shelf-like work table, and a large number of press apparatuses can be pressed at the same time.
It is now possible to perform plastic working on workpieces, and by using molds equipped with different types of punches, it is possible to systematically realize plastic working of a wide variety of products with little dirt in a space-saving manner. 1. Workability can be dramatically improved, and on the other hand, by installing a common drive source for these and controlling them by computer, space-saving automatic processing can be realized.

Furthermore, since the structure is relatively simple, maintenance required by law and during continuous use can be significantly reduced or unnecessary compared to conventional cam-type press devices and the like.

On the other hand, the pressing device is installed on the mold and directly presses down the movable plate of the mold by lowering the pressing plate.
There is no loss of energy, and since the pressing plate is lowered by compressed air or pressurized fluid, the pressing force can be made uniform in the surface direction, and the movable plate can be lowered in a tree-like manner. Accurate and reliable plastic working of the workpiece can be ensured at all times without the tip of the punch provided with the punch swinging laterally.

[Brief explanation of the drawing]

The drawings show an embodiment, and FIG. 1 is a perspective view of a press device showing an example using the air bag body according to claim 1, FIG. FIG. 3 is a longitudinal sectional view showing a state in which compressed air is press-fitted, FIG. 4 is a longitudinal sectional view of a press device showing an example in which a pressurized fluid injection part according to claim 3 is provided, and FIG. FIG. 4 is a longitudinal cross-sectional view of a press device, showing an example in which the press device according to claim 4 is used as a unit.

Claims (6)

[Claims] (1) A pressing device is formed by interposing an air bag body that can be expanded and contracted by press-in and discharge of compressed air between a pressing plate that is installed to be able to rise and fall and a fixed wall above the plate, and the pressing device is also processed. 1. A press working device, which is disposed on a mold, and is capable of directly pressing down a mold movable plate equipped with a punch by lowering the pressing plate when the air bag expands. (2) In the press processing apparatus according to claim 1, instead of the air bag body which can be expanded and contracted by pressing in and discharging compressed air, a fluid bag body which can be expanded and contracted by pressing in and discharging pressurized liquid fluid is provided. Press processing equipment. (3) A press plate that can be raised and lowered inside a cylindrical case is closely slid directly or indirectly against the inner wall of the case, and a pressurized fluid injection section for air or liquid is provided between the case top plate and the press plate. In addition to forming a device, the pressing device is disposed on the mold, and the mold movable plate equipped with a punch can be directly pressed and lowered by lowering the pressing plate when the fluid press-in part is pressurized. Press processing equipment. (4) The press processing apparatus according to any one of claims 1 to 3, wherein the pressing device is an independently separable unit, and the unit is detachably arranged and fixed to a mold. (5) A press working apparatus according to any one of claims 1 to 3, wherein the pressing device is integrally or fixedly disposed on the mold frame. (6) The press working apparatus according to any one of claims 1 to 3 and 5, wherein the pressing device is mounted and fixed on a post of a mold frame.