Reversible drive device with two single action cylinder implemented by closed abrasive

Abstract

The invention involves an abrasive material flow extrusion die cavity grinding mechanical device, it is used for grinding machine area. It is characterized by: the upper and lower cylinder group of coaxial hydraulic cylinder is a pair of two single-acting cylinder which is installed separately, the two sides of the upper cylinder group lower are fixed on one end of cylinder rods of two clamping cylinder, the top of two clamping cylinder are fixed on frame separately and the lower cylinder group is fixed on the frame directly. The invention has simple structure and low manufacture cost; the complexity of control system is reduced and reliability is increased; due to one of two single-acting cylinder is drive cylinder when operates, the movement and force of drive cylinder is transmitted to another cylinder through closed abrasive material, another cylinder is driven cylinder, therefore, the movement between the two upper and lower cylinder is fully synchronous and cooperative. It can apply back pressure to abrasive material according requirement through the backpressure valve which pressure is adjustable, so the pressure of abrasive material can be adjusted according requirement, thereby the work efficiency is improved.

Description

Technical field: [0001] The invention relates to an abrasive flow extrusion die cavity grinding mechanical device, which belongs to the field of machine tools for grinding and finishing, in particular to a mechanical device for grinding precision small holes and irregular holes. Background technique: [0002] Patent No. 97235716.5 discloses a cavity grinding machine, which uses two double-acting cylinders to drive the movement of the abrasive, and the hydraulic control circuits of the two double-acting cylinders are independent. The advantage is that the two cylinders can move in both directions respectively. The disadvantage is that the structure is relatively complicated; the second is that the two double-acting cylinders operate separately, and its synchronization is difficult to guarantee, even if a complex control circuit and high-precision hydraulic synchronization components are used, it cannot be completely error-free synchronization; The third is that for some work...

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Problems solved by technology

The disadvantage is that the structure is relatively complicated; the second is that the two double-acting cylinders operate separately, and its synchronization is difficult to guarantee, even if a complex control circuit and high-precision hydraulic synchronization components are used, it cannot be completely error-free synchronization; The third is that for some workpieces, it is necessary to apply back pressure to the abrasive to improve efficiency, and the structure of two double-acting cylinders is difficult to solve even the synchronization problem, and it is even more difficult to add a back pressure circuit.

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