Micro-embracing type puncher inner roller

Abstract

The invention relates to the technical field of seamless steel tube production devices, and discloses a micro-embracing type puncher inner roller. The micro-embracing type puncher inner roller comprises an inner roller body, the inner roller body is installed in a box body and driven by a driving mechanism, the driving mechanism is installed in the box body, and the bottom of the box body is fixedly connected with a box body installation mechanism. An inner pipe is arranged in the inner roller body, three core holding rollers are connected with the inner pipe through bent connecting rods, thetwo ends of each core holding roller are sleeved with the roller sleeves, the roller sleeves are connected with eccentric shafts, the inner pipe is driven by the driving mechanism to rotate, the innerpipe drives the roller sleeves to rotate around the eccentric shafts through the connecting rods, the core holding rollers are driven to move towards the middle, and the micro-embracing effect is achieved. Therefore, when the tail end of a tubular billet is nearly machined, the driving mechanism is started to slightly embrace the tubular billet, vibration of the tubular billet can be effectivelyavoided, and the production quality of the tubular billet is improved.

Description

technical field [0001] The invention relates to the technical field of seamless steel pipe production devices, in particular to an inner roll of a micro-embracing piercer. Background technique [0002] The piercing machine is one of the key equipments in the seamless steel pipe production line. It is used to roll the heated round billet into a capillary pipe, and provide a hollow billet for subsequent hot rolling and cold drawing. The three-roll guide device in the background equipment of the piercing machine plays the role of embracing the ejector rod and guiding the capillary pipe in the rolling process of the capillary, so that the center line of the ejector rod and the capillary always coincides with the rolling line. Whether its design is reasonable or not directly affects Product quality of seamless steel pipes. As the three-roller guide device closest to the piercing machine, the inner roller device in the machine has a more direct impact on the mechanical structure ...

AI Technical Summary

Problems solved by technology

When the existing perforating machine is close to the end of the capillary, due to the vibration, the wall thickness of the capillary tail is uneven, which seriously affects the production quality of the capillary.

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