Compaction hydraulic cylinder of upsetting machine

Abstract

The invention discloses a compaction hydraulic cylinder of an upsetting machine, and belongs to the technical field of reinforcing steel bar upsetting. The compaction hydraulic cylinder of the upsetting machine comprises a mold, a compaction oil cylinder, an upsetting oil cylinder, a mold base body and a control circuit. The mold is located in the mold base body; and the upsetting oil cylinder islocated above the mold base body and in a horizontal direction of the mold base body. The control circuit comprises a relay, a delay relay and an electromagnetic valve; the electromagnetic valve, therelay and the delay relay form a control loop connected with one end of a knife switch; and the other end of the knife switch supplies power. A vertical oil cylinder is located above the mold base body; and a horizontal oil cylinder is located on one side in the horizontal direction of the mold base body. The compaction oil cylinder and the upsetting oil cylinder each comprises a cylinder barrel and a piston; the piston is located in the cylinder barrel; and the diameter of the cylinder barrel is larger than 190mm. Aiming at the problem of insufficiency in pressure of the upsetting machine inthe prior art, through increasing the diameter of the hydraulic cylinder and increasing the upsetting pressure, non-standard reinforcing steel bars with same diameter and high strength can be upset.

Description

technical field [0001] The invention relates to the technical field of steel bar upsetting, in particular to a compression hydraulic cylinder of an upsetting machine. Background technique [0002] In construction engineering, when the steel bar head is connected, in order to ensure that the strength of the steel bar joint is not lower than the strength of the parent steel bar, that is, to meet the requirements of equal-strength connection, the steel bar head needs to be upset to ensure a sufficient cross-sectional area, and then process the thread. Although the existing steel upsetting machines can process standard steel bars, for non-standard steel bars with higher strength under the same diameter, although the pressure of the existing upsetting machines can meet the requirements of the national standard, the upsetting pressure is insufficient. It cannot be popularized and used on non-standard steel bars with the same diameter and higher strength; in addition, after the exi...

AI Technical Summary

Problems solved by technology

[0002] In construction engineering, when the steel bar head is connected, in order to ensure that the strength of the steel bar joint is not lower than the strength of the parent steel bar, that is, to meet the requirements of equal-strength connection, the steel bar head needs to be upset to ensure a sufficient cross-sectional area, and then process the thread. Although the existing steel upsetting machines can process standard steel bars, for non-standard steel bars with higher strength under the same diameter, although the pressure of the existing upsetting machines can meet the requirements of the national standard, the upsetting pressure is insufficient. It cannot be popularized and used on non-standard steel bars with the same diameter and higher strength; in addition, after the existing steel bar upsetting machine is used for a long time, there is a problem that the temperature of the hydraulic oil rises and the pressure is insufficient. Insufficient, resulting in poor upsetting quality, high defective rate, reducing production efficiency and production quality

[0003] The steel bars are clamped in the upsetting mold and then upset. The existing double-cylinder upsetting machine, such as the Chinese invention patent, publication number: CN107186141A, publication date: September 22, 2017, discloses a double-punch upsetting machine. For rough machines, the moving beam is connected to the upper die base, the main cylinder and the return cylinder drive the moving beam to move up and down, and drive the upper die connected to the upper die base to move up and down, so as to realize loosening and clamping. The disadvantage is that the patent uses Two hydraulic cylinders realize the clamping action, and the cost is relatively high. However, the moving beam is connected to the upper mold base, and the upper mold base is connected to the upper die, resulting in a complicated connection relationship and a rigid connection. Due to the upward movement of the hydraulic cylinder and the The strength of the downward movement is relatively large, so that during the long-term use of the rigid connection method, it is easy to cause impacts on the moving beam, the upper die base, the piston and the cylinder, and affect the service life of the overall upsetting machine; the downward movement and the upward movement are respectively controlled by the main Cylinder and return cylinder drive, so that the time spent on clamping and loosening is consistent, and the patent needs to go through two upsetting to form, the upsetting process is complicated, the production efficiency is low, and it is difficult to meet the needs of customers for high production efficiency

[0004] In addition, the existing upsetting machine has independent control of automatic upsetting and manual upsetting during use, that is, it is difficult to perform manual upsetting during the automatic upsetting process, and it is necessary to stop the automatic upsetting process Then carry out the manual upsetting operation. On the contrary, in the process of manual upsetting, automatic upsetting is difficult to intervene, and automatic upsetting can only be performed after the manual operation is completed, that is, it is impossible to freely switch between manual and automatic upsetting operations. Meet the needs of upsetting processing technology

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