Ring extruder for chain ring of round-link chain

Abstract

The invention relates to the technical field of mining round-link chain production equipment, in particular to a ring extruder for a chain ring of a round-link chain for processing and producing a flat chain. An existing ring extruder has a problem of defects in product quality and appearance as mandrels are separated up and down and are misplaced left and right. According to the technical scheme,the ring extruder comprises a rack, a movable rack, forming mechanisms, a resetting mechanism and a ring retracting mechanism. A first movable rack is arranged in the rack, the forming mechanism in avertical direction and the forming mechanism in a first horizontal direction are mounted on the movable rack, the forming mechanism in a second horizontal direction is formed on the rack, the movablerack moves along the extruding direction of the forming mechanism in the second horizontal direction in a chain ring extruding process and are matched with the forming mechanism in the vertical direction and the forming mechanism in the first horizontal direction, so that the extruding force of the chain ring and plastic deformation tension generated by the extruded chain ring are balanced by theforming mechanism on the rack and the movable rack in the respective directions. A phenomenon that the mandrels are separated is avoided, and the mechanical efficiency and the product quality are improved greatly.

Description

technical field [0001] The invention relates to the technical field of mining circular link chain production equipment, in particular to a circular link chain ring extruding machine for processing and producing flat chains. Background technique [0002] In order to upgrade the scraper conveyor with a larger size chain and sprocket, the coal mining machinery industry has started to use flat chains since the late 1980s. The so-called flat chain is the flat ring of the chain or the original ring of the circular chain. , while the stand rings are extruded into flat rings to reduce the overall height of the chain. Most of the flat rings are produced and processed by welding and extruding. The existing ring extrusion machines all adopt the frame welding structure. The extrusion head squeezes the straight edge of the chain link, so the flat ring produced in this way has defects such as poor processing quality consistency and high scrap rate. The reason is that the lower mandrel is...

AI Technical Summary

Problems solved by technology

Most of the flat rings are produced and processed by welding and extruding. The existing ring extrusion machines all adopt the frame welding structure. The extrusion head squeezes the straight edge of the chain link, so the flat ring produced in this way has defects such as poor processing quality consistency and high scrap rate. The reason is that the lower mandrel is fixed on the base of the frame and installed on the The mandrel cylinder above the frame controls the upper mandrel and the lower mandrel to press tightly to ensure that there is no tendency to separate during the extrusion process. The mandrel cylinder of this structure is always in a pressure-resistant state during the ring extrusion process, but due to the hydraulic system With a certain degree of elasticity, it is still inevitable that the upper and lower mandrels will be separated; and when the two extrusion cylinders are squeezed against the chain link, the extrusion forces on both sides of the chain ring are difficult to be synchronized and equal, resulting in The horizontal dislocation of the upper and lower mandrels; the hydraulic system operates under high load for a long time during the entire extrusion process, and the reactive power consumption is too large, resulting in low mechanical efficiency and high equipment failure rate

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