CN2607208Y - Roll for stretching machine - Google Patents

Abstract

The utility model discloses a roller of extending machine which can process metal tube blank into seamless steel tube. Front section of the roller is coniform and the rear section is columnar. The roller can reduce much production cost during process of steel tube.

Description

The elongator roll

(1) technical field

The utility model relates to a kind of seamless steel pipe processing equipment.Be the elongator roll that the metal pipe is processed into seamless steel pipe specifically.

(2) background technology

At present,, be used for pipe is processed into the elongator of fished pipe, all contain two rolls in the seamless steel pipe processing industry.The centre of this roll is a bit of to be cylindrical, and the both sides of cylindrical segment then are conical, its whole formation cydariform.Because two rolls of this elongator are cydariform, the pipeline external surface that processes can form external screw thread, and is more coarse.Address this problem, just must increase the number of times of cold-drawn operation, not only manufacturing procedure is many, and the material of consumption is also many, makes production cost higher.

(3) summary of the invention

The purpose of this utility model is to provide a kind of elongator roll.Use this Roller Machining steel pipe, can reduce production costs greatly.

For achieving the above object, the utility model is taked following technical solution:

The characteristics of elongator roll of the present utility model are, its leading portion is conical, and back segment is cylindrical.

Adopt such scheme, have the following advantages:

Because roll leading portion of the present utility model is conical, back segment is cylindrical.Make and the pipeline external surface smoother that processes to reduce the consumption of cold-drawn operation and material, reduce production costs.

(4) description of drawings

Fig. 1 is an elongator roll structural representation of the present utility model;

Fig. 2 is an elongator roll working state schematic representation of the present utility model;

Fig. 3 is that the A of Fig. 2 is to schematic diagram.

(5) specific embodiment

As shown in Figure 1, elongator roll of the present utility model, its leading portion 1 promptly are in one section of the elongator inlet side for conical, and back segment 2 promptly is in elongator and exports a section an of side for cylindrical.

See Fig. 2 and Fig. 3, two rolls are arranged on every elongator.During work, two rolls and work housing, main power plant, reductor, gear-box etc. are used, and constitute an elongator.Wherein, two rolls are installed in the left and right both sides of work housing respectively.In perpendicular, the angle of intersection of roll mandrel and rolled piece axle is that advancing angle is β.In horizontal plane, roll mandrel and rolled piece axle constitute an exhibition and roll angle γ.Drive universal drive shaft by main power plant through reductor, gear-box and do rotation in the same way, and constitute a looping pit with upper and lower guide plate and top, pipe enters between this looping pit and two rolls successively, relies on the frictional force between two rolls and base pipe, drives pipe and does reverse rotation.Simultaneously, because the effect of advancing angle β, pipe moves along its axis in rotation.Because the leading portion of roll is conical, the peripheral speed of roll is from the import to the outlet increases trend gradually, the movement velocity that makes roll with more coordinated by the movement velocity of strip plate pipe, thereby reduce axial slip amount and circumferentially additional shear stress, the roughness on the inside and outside surface of base pipe is reduced greatly.

Claims (1)

1. the elongator roll is characterized in that the leading portion (1) of this roll is taper shape, and back segment (2) is cylindrical.

Images