JPS5870929A - Impact hydraulic forming device - Google Patents

Abstract

PURPOSE:To reduce the loss of energy and to improve the efficiency and working property in working a metallic material generating superhigh pressure instantaneously, by unifying the hydraulic pressure generating section and forming section. CONSTITUTION:A metalic material is inserted into a forming die, and filled with liquid. Then, hammers 11, 11' are accelerated in upright cylinders 4, 4' by pneumatic pressure. Plungers 12, 12' are thrusted into the liquid to generate high hydraulic pressure in hydraulic pressure chambers 5, 5'. Generated high hydraulic pressure is transmitted from upper and lower liquid inlets 9, 9' of the forming section B to a hydraulic forming chamber through the shortest distance, and the metallic material is plastically worked. The die 15 is fitted to allow free separation to enable the metallic material in the working chamber 10 to go in and out. Thus, loss of energy is reduced and the efficiency and working property are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic forming device for processing a metal material inserted into a molding die by impact liquid pressure, in particular, a liquid filled with light is pressed by the kinetic energy of a hammer, - This invention relates to an impact hydraulic forming device that momentarily generates hydraulic pressure in a pan and uses the generated hydraulic pressure for plastic working, fountain working, forging, etc. of metal materials.

Traditionally this'! ! In the ia setting, the hammer in the 7 cylinders is accelerated by air pressure, and the plunger fixed to the tip of the hammer is thrust into the plunger guide hole in the hydraulic pressure chamber, thereby instantaneously generating high pressure in the hydraulic pressure chamber. It is known that this high hydraulic pressure can be used for plastic working. For example, there is a device as shown in the above figure proposed by the inventor Go. In such a conventional device, the impact hydraulic molding device and the molding processing section B are connected by a connecting pipe 63, so the communicating waterway is connected through a side hole, and the conventional water sealing method is troublesome for the connection. This often causes cavitation and fatigue damage that occur in the hydraulic chamber 5.
It is necessary to add a water valve 64 and an air bleed means 65, and since a large impact force is used, the device base and frame structure become complicated, large, and heavy, which is inconvenient and uneconomical, as well as impact resistance. There is a lot of wasted force, which tends to cause breakage of the molding die, poor processing and forming properties, and especially in products that are processed by striking at high speeds, vibrations are generated even though a large striking force can be obtained for the equipment. This also made the entire device large and expensive, and in addition, when the separately constructed high pressure generator and molding machine were connected, a large number of sealing structures were required at the connecting part, which increased water pressure leakage. In addition to being unfavorable in terms of efficiency and deteriorating plastic workability, improving workability requires a high-pressure generator with a correspondingly large capacity, which complicates the structure and impairs durability. .

The present invention aims to effectively eliminate these conventional drawbacks, and constructs an impact hydraulic forming apparatus that enables high-speed plastic working, reduces hydraulic leakage as much as possible, and has cavitation close to zero. The purpose is to provide a simple, convenient, and inexpensive product.

In addition, in the present invention, ultra-high hydraulic pressure is generated instantaneously to enable plastic working to be performed, and a relatively large force is applied to the material to be processed using a relatively small moving device.
Moreover, it is also an object of the present invention to provide an apparatus with good workability, which can perform continuous and repeated work without the danger of breaking the molding die, and can significantly improve efficiency.

In the present invention, a hammer is accelerated in an upright cylinder by gas pressure such as compressed air, and a plunger directly connected to the lower side of the hammer is set at high speed to release the free surface of a liquid such as water filled into a hydraulic chamber. a hydraulic pressure generating section that causes the plunger to penetrate into the liquid, compresses the liquid in the hydraulic pressure chamber through a plunger guide hole provided in the hydraulic pressure chamber, and instantaneously generates high water pressure; In a device that plastically processes metal materials supported in a forming section including a forming die using high hydraulic pressure,
The hydraulic pressure generating chamber and a molding section having a molding die are fixed in a continuous upright position, and the pressure liquid outlet of the pressure vine in the hydraulic pressure generating section is connected to the hydraulic processing chamber of the molding die having a shaped surface. 1. A 9IIA semi-pressure forming apparatus characterized in that the molding die is separably fitted and arranged so that the metal material in the hydraulic processing chamber can be directly connected and integrated with the hydraulic processing chamber. be.

To explain the present invention based on the drawings, in FIG. 2, a main cylinder 4 and a main hydraulic pressure chamber 5 are formed inside a top plate 6 fixed on a bottom plate 1 via a column 2. Pressure chamber outside l1
The base 7 that supports the bottom plate 1 has an auxiliary cylinder 4' and an auxiliary hydraulic pressure chamber formed inside to receive the a hydraulic pressure w15'. A second hydraulic pressure generating section A' is provided which is concentrically connected to the housing 6'.

The pressure fluid outlets 8.8' of A' are arranged facing each other on the same straight line, and the generated W76 is placed between the two fluid pressure generating parts A and A'.
A forming section B for plastically working metal materials at a pressure is provided with its pressurized liquid inlets 9 and 9' directly connected to the pressurized liquid outlets 8 and 8'. That is, both the liquid royal chambers 5.5' and the hydraulic processing chamber 10 formed in the center of the forming section B are arranged on the same axis.

The main cylinder 4 of the hydraulic pressure generator has a main hammer 11 that fits and slides therein, and a glazer 12 is directly connected concentrically to the lower part of the main hammer 11, and air is supplied to the upper part of the main cylinder 4. The main hammer 11 is configured to rise or fall by introducing negative pressure or compressed air, and the plunger 11 is inserted from the free surface into a plunger guide hole provided in the main hydraulic pressure chamber 5 filled with liquid. The pressure liquid outlet 8 is provided outside the main hydraulic pressure chamber 6 on the extension line of the plunger guide hole.

The second hydraulic pressure generating part A' also has a secondary hammer 11 that slides in the secondary cylinder 4' in the same manner as the first hydraulic pressure generating part is turned upside down.
' rise causes high hydraulic pressure, but the sub-grandger 12'
A seal portion 16 is provided at the copper plastic/jar guide hole so that liquid can be held between the upper and lower hydraulic pressure chambers 5, 5'.

In addition, this second hydraulic pressure generation e A'H outside the sub-hydraulic pressure chamber [6
The lower cylinder 19 of the hydraulic machining chamber 10, which is connected to the outer casing 6', is moved up and down to remove the metal material in the hydraulic machining chamber 10. It is designed to be fixed by crimping.

The molding processing section B includes a molding die 15 placed on the bottom plate 1 and an upper piston 16 that holds a metal material provided on both sides of the hydraulic processing chamber 10 in the molding die 15. , a lower piston 17, and an upper cylinder 18 which is a respective cylinder.
, a lower cylinder 19, a holder 20 for holding the molding die 15, and a frame 21. A penetrating pressure liquid outlet 8 is connected to the outside 1 and 6 so as to form one linear flow path. On the other hand, the lower cylinder 19 is inserted into the bottom plate 1 so as to be able to move up and down, and the pressure liquid inlet 9' in the lower cylinder 19 and the pressure liquid outlet 8' in the -J* royal enclosure 6' are the same as described above. connected. The hydraulic machining chamber 1 is connected to the upper and lower pistons 16 and 17 through the flow passages.
It communicates with 0.

This molding die 15 is a hollow cylindrical body, and has a shaped surface on its inner circumferential surface, and holds a metal material in the hollow part, which is the hydraulic processing chamber 1o, which is concave with the shaped surface. It is made up of at least three split pieces to allow access. Similarly, the holder 20 is also a truncated cone-shaped member having a hollow portion capable of holding the molding die 15 therein so as to be removable and removable, and is shaped so that it can be separated into at least three pieces.

A frame 21 having an inner peripheral tapered surface that fits into the outer candle tapered surface of this holder 20 is inserted into and removed from the holder 2o to move the molding die 15 in and out.

Further, the frame 21 is provided on the pillar 2 so as to be movable up and down, and is configured to securely press and hold the holder 20 with a locking mechanism 22.

Note that the hammers 11 and 11' operate the same compressed air source 26 and the same air supply valve 24 to operate the same air supply valve 24 for the forward movement, and for the return movement, the hammer 11 is raised by applying vacuum pressure, and the hammer 11 is raised by applying vacuum pressure. 1
1' is lowered by its own weight in preparation for the next processing.

FIG. 3 shows another embodiment, which is a small and simple molding device in which the sub-hydraulic pressure generating section A' is omitted.

In the figure, 25 is an air reservoir, 26 is a pressure reducing valve, 27 is a vacuum pump,
28 is a vacuum reservoir, 29 is a suction valve, 60 is a water supply solenoid valve, 61
numeral 62 is an atmospheric opening, and 62 is a kite hole provided in the frame 21 for sliding the support.

But 4. Then, the material to be processed is inserted into the molding die 15, the holder 20, the frame 21, and the lower cylinder 19 are inserted.
After the metal material is securely fixed in the molding metal 15, it is filled with water.

At the same time, compressed air is supplied to A', and the plunger 12°12
′ is moved to generate high hydraulic pressure. The generated high hydraulic pressure is transmitted from both the upper and lower pressure liquid inlets 9, 9' of the forming processing section B into the hydraulic processing chamber 10 in the shortest distance, and since the metal material is plastically worked, all the generated high hydraulic pressure is processed without wastage. Since it is converted into energy, plastic working can be performed efficiently.

The present invention provides compression 2I! A hammer is accelerated in an upright cylinder by the pressure of gas such as air, and a plunger directly connected to the underside of the hammer is set at high speed to penetrate the free surface of a liquid such as water filled in a hydraulic chamber and into the liquid. A hydraulic pressure generating section that causes the plunger to enter, compresses the liquid through a plunger guide hole provided in a hydraulic pressure chamber, and generates high water pressure in an instantaneous impact, and a mold for molding with this 111) +a pressure. In an apparatus for plastically working a metal material supported in a molding section, the hydraulic pressure generating section and a molding section with a molding die are fixed upright continuously, and the pressure fluid in the hydraulic chamber in the hydraulic pressure generating section is The outlet is directly connected and integrated with the hydraulic processing chamber for the amount of molding metal having a shape, and the molding die is freely separated so that the metal material in the hydraulic processing chamber can be taken in and out. By fitting and deploying, the hydraulic pressure generating part and the forming part are integrated into a compact device, and there is no cavitation, so efficient plastic working is possible without energy loss, and the durability is high. In addition, the frame structure can be simplified, eliminating the need for a cylinder to lift the frame, and eliminating the need for an air bleed valve in the processing section.In addition, a solenoid valve for water supply instead of a water valve can be used in place of a water valve, which is sufficient in time and requires less material. It is possible to create a hydraulic molding device that is extremely easy to enter and exit and that improves workability.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional example, FIGS. 2 and 3 show an embodiment of the present invention, FIG. 22 is a vertical cross-sectional view, and FIG. 3 is a vertical cross-sectional view of another embodiment. A, A'...hydraulic pressure generation part, B...molding processing part,
1...bottom gong, 2...post, 6...top plate, 4.4'
...Cylinder, 5゜5'...Hydraulic pressure chamber, 6.6'...
- Hydraulic pressure chamber outside hoe, 7... Base, 8゜8'... Pressure liquid outlet, 9.9'... Pressure liquid inlet, 1o... Hydraulic processing chamber, I
L, 11'...Hammer, 12, 12'...Plunger, 16...Seal portion, 14...Material setting drive device, 15...Molding mold, 16.17...
Piston, 18.19...Cylinder, 20...Holder, 21...Frame, 22...Rot/1u11゜Procedural Amendment March 2, 1985 Haruki Shimada, Commissioner of the Patent Office 1, of the case Display 1981 Patent Application No. 1687
No. 57 No. 2, Title of the invention Impact hydroforming device 3, Relationship to the amended case Patent applicant address (residence) 1 Kamariya-cho, Kanazawa-ku, Yokohama, Kanagawa Prefecture Name (name) (33) Tokyu Car Manufacturing Co., Ltd. Representative Iwao Takahashi 4, Agent 7, Subject of amendment Description: Detailed explanation of the invention column 8, Contents of amendment

Claims (1)

[Claims] t A hammer is accelerated in an upright cylinder by gas pressure such as compressed air, and a plunger directly connected to the bottom of the plunger is hidden at high speed, and water, etc., filled in a hydraulic chamber is plunging the plunger into the liquid through the free surface of the liquid;
A hydraulic pressure generation unit that compresses the liquid in the hydraulic pressure chamber through a plunger guide hole provided in the hydraulic pressure chamber to instantaneously generate high hydraulic pressure, and a molding process that includes a mold for molding using this high hydraulic pressure. In an apparatus for plastically working a metal material supported in a part, the hydraulic pressure generating part and a molding part with a mold for molding are fixed in a continuous upright position, and the pressure fluid in the hydraulic chamber in the hydraulic pressure generating part is The outlet is directly connected and integrated with the hydraulic machining chamber of the shaped mold, and the mold is separably fitted so that the metal material in the hydraulic machining chamber can be taken in and out. An impact hydraulic molding device characterized by its deployment. 2. The cylinder has an outer casing concentrically forming a hydraulic pressure chamber below the outer casing, and is connected to the molding die via an upper cylinder vertically connected below the outer casing. 72. The impact hydropressure forming apparatus according to claim 71, wherein the impact hydroforming apparatus is 6. The molding section is installed on the bottom plate by connecting an upper cylinder and a lower cylinder each having a slidable piston disposed above and below the mold, and the hydraulic pressure generating section and the [Claim 1 or 2] The impact hydraulic forming apparatus of J.J. Kei, wherein the hydraulic processing chamber of the molding die is in communication with the hydraulic processing chamber on a four-axis line. 4. The molding mold is a split mold into which a tubular metal material is inserted, and is equipped with a slidable holder on the outer periphery of the mold to (6) hold the metal material. An impact hydropressure forming apparatus according to claim 1, claim 1, or claim 3. 5. The molding metal described above is held inside while being enclosed in a holder, and is equipped with a wedge-shaped frame that can be inserted and removed automatically. Section, 2nd
IiJ'l hydroforming apparatus according to item 3, item 3 or item 4. 6. The hydraulic machining lever is installed between the hydraulic pressure generating part including the main hammer and the regular cylinder including the secondary hammer connected in an upright state, and is provided on a frame that can be raised and lowered. The #J Hayabusa hydraulic forming apparatus according to Section 4 or Section 5 of Tokken Hosho, which is disposed in the center of the holder.