SU1209343A1 - Hydromechanical piercing apparatus - Google Patents

Description

The invention relates to a tooling for sheet metal forming and can be used in the radio industry.

The aim of the invention is the expansion of technological capabilities by providing products with closely-spaced holes such as printed circuit boards.

The drawing shows the proposed device.

The device comprises a chamber 1 mounted on the bottom plate 2, a plunger 3 placed in the cavity A of the camera 1 and equipped with springs .4, the top plate 5 connected by columns 6 with the plunger 3 and the bottom plate 2, the matrix 7 fixed on the upper plate 5. In the plunger 3 there are made through holes communicating with the cavity of the chamber 1. On the plunger 3 on the side facing the die 7 there is an elastic sealing gasket 8c. holes, in which the coaxial sleeves 9 are installed coaxially with the working windows of the die 7.

The flow area of each sleeve 9 in shape and size corresponds to the working window of the matrix, coaxially with which it is located. Seals 10 are placed in the reservoir 3 and the studs 11 are secured to install the workpiece. The cavity of chamber 1 is connected by a suction valve 12 with a basin 13 limited by a casing 14. To limit the pressure in chamber 1, there is an additional cavity. An additional plunger 15 is placed against it, resting on the market cushion 16.

12093432

The device works as follows.

The PCB blank is mounted on pins 11 and includes at 5 waters, in particular a drive for a press ram. During the course of the upper plate 5 and the die 7 downward, the latter presses the workpiece against the gasket 8, blocking the holes in the sleeves 10 and 9 and sealing the holes, the plunger 3 and the cavity A of the chamber 1.

In the further course of the upper plate 5 and the die 7, the force through the sealing gasket 8 is transmitted to the plunger 3, which displaces the liquid from the cavity A of the chamber 1 through the openings VO of the sleeves 9, creates a force /

in the parts of the workpiece that are coaxial with the holes in the sleeves 9 and the working windows in the die 7, and ensures the formation of holes. After the holes are formed in the workpiece, the liquid

through the working window in the matrix 7 enters the channels in the top plate 5 and through them to the drain into the pool 3. The sleeves 9 prevent the holes in the elastic gasket 8 from deforming during its compression.

During the return stroke of the press of the spring 4, the plunger 3 returns to its original position, and the liquid from the pool 3 is sucked into the cavity A of the chamber 1 through the valve 12.

The use of the proposed device will provide the possibility of obtaining products with closely spaced holes such as boards.

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Claims (1)

(54 j 'DEVICE FOR HYDROMECHANICAL PUNCHING OF HOLES with a rigid matrix having several working windows and liquid punches, containing a chamber with a cavity filled with liquid, and a plunger placed in it, characterized in that, in order to expand technological capabilities by ensuring the receipt of products with closely spaced holes such as boards, in the plunger are made through holes communicating with the cavity of the chamber, and it is equipped with an elastic sealing gasket located on the side facing the matrix, equipped rigid sleeves arranged coaxially with the working window of the matrix and made with pro- © Khodnev sections corresponding to the shape and size of windows operating matrix.