CN200984593Y

CN200984593Y - Accurate steel-tube cold drawing machine chucking

Info

Publication number: CN200984593Y
Application number: CN 200620112385
Authority: CN
Inventors: 庞德光; 陈会议; 王相亭
Original assignee: HUAIBEI COAL GROUP MECHANICAL AND ELECTRICAL EQUIPMENT CO Ltd
Current assignee: HUAIBEI COAL GROUP MECHANICAL AND ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2006-04-04
Filing date: 2006-04-04
Publication date: 2007-12-05
Anticipated expiration: 2016-04-04

Abstract

The utility model discloses a fixture for precision steel tube cold-drawing machine which is especially suitable for the requirements to fixture when a large diameter steel pipe is cold-drawn. The main method is that: the rear of a jaw (1) is processed into an inner conical surface; a cone core (2) is designed to make the outer side coordinate with the contacting part of the jaw (1) rear; the cone core (2) moves under the effect of a clamp oil cylinder (7) to drive the jaw (1) to make composite movement and make the jaw (1) open synchronously. As the strong power of the cone core (2) movement is from the clamp oil cylinder (7), the phenomenon of that the jaw (1) cannot stretch synchronously because of the deficient spring force. The utility model improves the reliability, safety and automation degree in clamping process are improved, especially satisfies the requirements to fixtures in large diameter steel pipe precision cold-drawing production, and is simple in structure.

Description

Precision tube drawbench anchor clamps

Affiliated technical field

The utility model relates to a kind of anchor clamps of precision tube drawbench, when especially being fit to the accurate cold-drawn of large-diameter steel pipe to the requirement of anchor clamps.

Background technology

The precision tube drawbench is a kind of special nothing cutting deep hole processing equipment.It is a principle of utilizing metal extruding plastic deformation, end by clamp blank metal tube (seamless pipe) applies powerful axially drawing (pulling out) power to metal tube, metal tube is under the squeezing action of interior external mold, its wall thickness generation plastic deformation, thereby reach required size and surface quality, compare with traditional metal cutting processing technology have shaping speed fast, save material and investment, low, the product quality advantages of higher of energy consumption.

The precision tube drawbench is in process of tube plug drawing mill, because what apply axially draws (pulling out) power very big (more than hundred tons, to hundreds of tons), thereby, can can anchor clamps clamp the tube head that is drawn (pulling out) steel pipe reliably, quickly and easily, be directly connected to accurate cold-drawn product quality and production efficiency so that realize drawing.At present, the anchor clamps of precision tube cold-drawn adopt " spring " jaw to clamp mostly, it is to lean on the active force of spring base medi-spring to strut jaw that jaw resets, though this form has advantage of simple structure, but also there are many defectives, especially when draw heavy caliber metal tube, because of jaw overall dimensions and weight become big, the decrement of clamping process spring increases, and limited by steric requirements, spring can not strengthen synchronously, often cause spring because of excessive inefficacy of loading, when draw finishes jaw and resets, cause jaw not open or can not open simultaneously, cause the jaw phenomenon of " bowing ", influence tube drawing pipe embryo and " resign oneself to a loss ".In actual production process, the operative employee will be sitting in manual clamping on the dolly body, and both abuse influenced production efficiency again.

Summary of the invention

For overcoming existing precision tube cold-drawn anchor clamps, especially when the accurate cold-drawn of large-diameter steel pipe, the anchor clamps jaw can not synchronous open deficiency, and the utility model provides a kind of anchor clamps of new version.It can stablize, open reliably, quickly jaw, in the time of especially satisfying the accurate cold-drawn of large-diameter steel pipe to the requirement of anchor clamps.

The technical scheme that its technical problem that solves the utility model adopts is: the rear portion of jaw be inner conical surface and with the awl core male cone (strobilus masculinus) match.Drive the awl core by clamping cylinder and move back and forth, thereby the drive jaw is made compound motion and opened synchronously.Because the power of awl core motion is from clamping cylinder, powerful, avoided because of the spring force deficiency causes jaw can not synchronous open phenomenon.

The beneficial effects of the utility model are: improved the automaticity of reliability, security and the clamping process of precision tube cold-drawn anchor clamps, especially satisfied the requirement of the accurate cold-drawn production of large-diameter steel pipe anchor clamps, and simple in structure.

Description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the section of structure of the utility model precision tube cold-drawn anchor clamps.

Fig. 2 is the amplification profile of cold-drawn anchor clamps jaw among Fig. 1.

Fig. 3 is that the A of Fig. 2 is to view.

Fig. 4 is the amplification profile of cold-drawn anchor clamps awl core among Fig. 1.

The specific embodiment

As shown in Figures 1 to 4, the utility model comprise one the awl core (2), the rear portion of jaw (1) be an inner conical surface and with the awl core (2) male cone (strobilus masculinus) match.Its operation principle is:

In position shown in Figure 1, the piston rod of clamping cylinder (7) stretches out to left movement, drive flange (17), mandrel (16), guide pillar (6) and awl core (2) etc. earlier and move one section idle stroke left, make the awl core (2) and the inner conical surface at jaw (1) rear portion produce certain clearance, do the radial contraction motion for jaw (1) and reserve enough spaces.Then, the piston rod of clamping cylinder (7) continues to promote flange (17), floating disc (4) to left movement, and floating disc (4) promotes the male cone (strobilus masculinus) of jaw (1) and makes compound motion forward along the dolly conical surface, clamps waiting to pull out the steel pipe tube head, finishes the clamping operation.Tube head clamps the other end motion that back drawbench master cylinder (14) drives little car body (13), and clamped workpiece (8) makes it produce plastic deformation in the squeezing action of internal mold (9) and external mold (11), thereby realizes draw.

When draw finishes, the piston rod of clamping cylinder (7) shrinks, at first elimination awl core (2) cooperates the gap between the conical surface with jaw (1), drive jaw (1) then, floating disc (4) etc. continues to move right, touch limited block (5) up to floating disc (4), at this moment, limited block (5) carries out spacing to floating disc (4), but piston rod continues to shrink, thereby make awl core (2) produce an active force to the rear portion inner conical surface of jaw (1), make jaw (1) do radial motion, jaw (1) is opened synchronously, piston rod stops to shrink when jaw (1) radially moves to the position of briquetting (3), clamping cylinder (7) pressure is in the lock state, jaw (1) opens to greatest extent simultaneously, guarantees by the pipe embryo of clamping smooth " resigning oneself to a loss ", to finish a complete working cycles next time.

Claims

1. precision tube drawbench anchor clamps, when especially being fit to the accurate cold-drawn of large-diameter steel pipe to the requirement of anchor clamps, comprise jaw (1), awl core (2), briquetting (3), floating disc (4), limited block (5), guide pillar (6), clamping cylinder (7), mandrel (16), flange (17) parts of etc.ing, it is characterized in that: the rear portion of jaw (1) is inner conical surface and matches with the male cone (strobilus masculinus) of boring core (2).