Self-adjustment type compound hydraulic machine used for microcrystal iron core

Abstract

The invention discloses a self-adjustment type compound hydraulic machine used for a microcrystal iron core. A plurality of stand columns are arranged on a machine body; an upper beam, a workbench and a lower beam are fixed on the stand columns respectively; an upper movable beam, an upper upsetting beam and a lower movable beam are connected on the stand columns in a sliding mode; an air cylinder and a plurality of auxiliary cylinders are arranged at the top end of the upper beam; an ejector cylinder is arranged on the lower beam; an upper upsetting cylinder and a gas-liquid energy accumulator are arranged on the upper movable beam; a return drawbar which is fixed by a limiting and locking bolt is arranged on the upper movable beam in the sliding mode; an upper upsetting convex mould is arranged on the upper upsetting beam; a lower upsetting convex mould is arranged on the lower movable beam; an upper extrusion convex mould is arranged on the upper movable beam; a lower extrusion convex mould is arranged on the piston of the ejector rod in the lower beam; and a concave mould is arranged on the workbench. According to the self-adjustment type compound hydraulic machine, the forming precision is high, the service lives of the moulds are long, stress concentration is not liable to cause, the production efficiency is improved, precision forming for molding gears is good, deformation is not liable to produce, the bearing capacity and the operation precision are safe and reliable, and the investment cost is reduced.

Description

technical field [0001] The invention relates to a self-adjusting composite hydraulic press for a microcrystalline iron core. Background technique [0002] The bearing frame is the most important part of the hydraulic machine body, so the bearing frame must have sufficient strength and rigidity to meet the performance requirements and economy of different manufacturing processes. However, in the technical field of hydraulic presses, there is still no major breakthrough in the structural design of the bearing frame of the existing hydraulic presses, which have the same shape, single function, low performance, and limited range of process applications. [0003] As shown in the mechanical principle of traditional spur gear upsetting and pressing, after placing the cylindrical blank in the concave mold cavity, the upsetting punch moves down to the blank to pressurize it to form it in the concave mold cavity. Due to the forming pressure and the blank The flow direction in the too...

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Problems solved by technology

However, in the technical field of hydraulic presses, there is still no major breakthrough in the structural design of the bearing frame of the existing hydraulic presses, the shape is the same, the function is single, the performance is low, and the range of process applications is limited.

[0003] As shown in the mechanical principle of upsetting and forming of traditional spur gears, after the cylindrical blank is placed in the concave mold cavity, the upsetting punch moves down to the blank to pressurize it to form it in the concave mold cavity. Due to the forming pressure and the blank The flow direction in the tooth-shaped cavity of the concave die is orthogonal, and the theoretical component force of the forming pressure in the tooth-shaped flow direction is zero. Therefore, it can only be forced to fill the cavity with metal when the height of the blank is reduced under pressure according to the condition that the plastic deformation volume remains constant. The tooth-shaped cavity of the die makes it difficult to fill the tooth-shaped cavity with metal, and at the same time, it is easy to produce microcracks at the tooth root, and the required upsetting pressure is very high, and the service life of the mold is very low, resulting in stress concentration , low production efficiency and high energy consumption, especially for spur gears with large diameter and large modulus, which is the main problem of plastic precision forming of spur gears

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