SU476154A1 - Vice - Google Patents

Description

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The invention relates to devices for metalworking machines and can be widely used in machine-building, machine-tool, instrument-making, aviation and other industries.

Known vise for metalworking machines containing a base, clamping jaws, one of which is connected to the base by a screw pair, and a power drive comprising two cylinders, one of which is hydraulic, and pistons with rods moving in them.

The disadvantage of the known vice is that they fix the part, but do not feed it into the treatment area and return it after the operation.

In order to increase labor productivity by combining the workpiece in one device and feeding it to the machining tool, as well as withdrawing it from the treatment area, in the proposed design the second cylinder is hydraulic, the bodies of both hydraulic cylinders are jaws, and their rods interact with the base.

The drawing shows the proposed vise in longitudinal section.

The vice consists of a body 1 with two vertical thrust walls 2, 3, a thrust movable sponge 4 with a single-cavity hydraulic cylinder, a movable clamping sponge 5 with a two-cavity hydraulic cylinder. The diameter of the piston 6 is smaller than the diameter of the piston 7. A coupling 8 connects the rod 9 of the piston 7 with an adjusting screw 10.

Vices work as follows.

A pipe is connected from the hydraulic system to the hole 11 of the hydraulic cylinder of the support sponge 4, and x Two pipelines are connected to the holes 12 and 13 of the hydraulic cylinder of the clamping sponge 5 through the control valve for supplying fluid to the cylinder cavity.

The initial position of the sponge 4, 5 is taken after the fluid is supplied under pressure in the cavity of the hydraulic cylinders through the openings 12 and 13, then the adjusting screw 10 sets the required distance between the jaws 4, 5 to freely install the part between them.

After installation of the part between the jaws 4, 5, turn the handle of the control crane, the liquid through the hole 12 enters the brushless cavity of the hydraulic cylinder of the clamping jaw 5, the part is clamped with a force equal to the force created by the hydraulic cylinder of the supporting jaw 4. Since the brushless area of the clamping jaw 5 is 10 more than the no-rod area of the piston 6 of the support sponge 4, therefore, the acting forces directed against each other are not equal, and the difference in the forces generated on the rods 9, 14 of the pistons 7 and 6 causes the gu to move simultaneously 5 and 4, along the guides of the vice with the part between them in the direction of the support sponge 4, i.e., into the treatment zone, the liquid from the rodless cavity of the hydraulic cylinder of the support sponge 4 is displaced into the discharge pipeline, and from the rod cavity of the hydraulic cylinder clamping the sponge 5 through the opening 13 is forced into the drain pipe.

After finishing the machining of the part, turn the handle of the control valve, the liquid through the hole 13 enters the rod cavity of the hydraulic cylinder of the clamping jaw 5, and the displaced fluid from the rodless cavity of the hydraulic cylinder of the jaw 4 through the holes 11 tends to return the jaw 4 to its original position. And since the volume of the thrust cylinder of the thrust sponge 4 is less than the volume of the hydraulic cylinder of the clamping sponge 5, the speed of filling of the pressure sponge 4 with the liquid of the cavity of the hydraulic cylinder of the sponge 4 is greater than the filling speed

the fluid cavity of the hydraulic cylinder of the clamping jaw 5, which causes the jaws 4, 5 to mix with the detail locked between them with greater speed towards the clamping jaw 5, 5, i.e., the part is accelerated to retract from the machining zone.

After stopping the movement of the support sponge 4, the clamping sponge 5 continues to move up to the stop of the piston 7 into the housing of the sponge 5, and the part is released.

Subject invention

Vice for metalworking machines containing a base, clamping jaws, one of which is connected to the base by a screw pair, and a power actuator comprising two cylinders, one of which is hydraulic, and pistons with rods moving in them, characterized in that in order to increase productivity The second cylinder is also hydraulic, the housings of both hydraulic cylinders are used as clamping jaws, the pistons are made with different diameters, and their rods interact with the base.

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