CN87210664U

CN87210664U - Small curvature semidiameter cold-pushing elbow forming unit.

Info

Publication number: CN87210664U
Application number: CN 87210664
Authority: CN
Inventors: 唐仁伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-10-23
Filing date: 1987-10-23
Publication date: 1988-07-06

Abstract

The utility model relates to a unit used for the forming of the elbow, in particular to a small curvature semidiameter cold-pushing elbow forming unit. The utility model is characterized in that semicircular integration workpieces of the inner tube of the inner of the elbow and the outer tube of the outside of the elbow are butted together, forming the bending passageway which fits the curvature of the original tube blank; a hinge core rod, which is consistent with the internal diameter of the original tube blank and concentric with the bending passageway, is arranged in the center line of the bending passageway; the original tube blank and the hinge core rod are bent freely by a push rod in the bending passageway and a guide sleeve. The small curvature semidiameter cold-pushing elbow produced by the utility model has the advantages of homogeneous deformation, high production efficiency, etc.

Description

Small curvature semidiameter cold-pushing elbow forming unit.

The utility model is a kind of device that is used for the bend pipe moulding, especially for the shaped device of cold bend pipe with small radius of curvature.

Invent the manufacture method and the device of described bend pipe according to the clear 53-39181 of Japanese patent gazette, wherein have following problem.

One, the moulding plug is a single piece, and is placed in the bend pipe passage, and all more complicated are processed, mounted and dismounted to this plug, and sideshake is difficult for adjusting.

Two, because the moulding plug is fixed in the bend pipe passage, so resistance Da Yi blocks during bend forming.

In order to overcome the problems referred to above, the utility model provides a kind of to its plug and has had that flexible plug is convenient to that cold bend pipe is shaped, installs, dismounting and adjusting, and adds can not form resistance man-hour and be stuck.

The purpose of this utility model has provided a kind of hinge type plug and the cold shaped device that pushes away processing small curvature radius 90 degree bend pipes of back-stop mechanism.

The utility model is to adopt following method to realize, have the inner tube of a tyre of bend pipe inboard and the whole workpiece butt joint in cover tire half and half garden outside the bend pipe, constitute the bending channel of the required curvature of bend pipe, dock fairlead in outer rim with an end of cover tire simultaneously near the inner tube of a tyre, be communicated with aforesaid bending channel, constitute former pipe introduction channel, on the center line in bending channel, by concentric with bending channel and to the corresponding to hinge plug of former pipe internal diameter, effect by push rod makes the hinge plug crooked free to advance or retreat in bending channel and fairlead, and the inner tube of a tyre is a rotary state when promoting hinge plug and former pipe.

During operation, at first former pipe is processed into the former pipe of trapezoidal cross-section, the short inboard that partly forms bend pipe, the long outside that partly then forms bend pipe, former pipe is placed in the fairlead, and push rod pushes bending channel to the hinge plug together with former pipe, depress back-stop mechanism simultaneously after, enter in the bending channel, in bending channel, form and former pipe uniform thickness, isometrical and curvature elbow that bending channel is identical.

The utility model is compared with the manufacture method and the device (Japanese clear 53-39181) of bend pipe, what the utility model adopted is the hinge plug, can bend to shaped form, can stretchingly become linear again, be not fixed in the bending channel in the production, thereby this mechanism is few non-cutting time, the production efficiency height, and because adjusting process and mechanism are simple, hinge plug and former pipe enter in the bending channel simultaneously, reduce the frictional force between moulding pipe and the plug, not only distortion is even, and percent defective is low.

Fig. 1 is the utility model cold bend pipe with small radius of curvature device, and former pipe is placed in the fairlead, makes push rod advance hinge plug and former pipe to come into effect the profile of state.

Fig. 2 is the utility model cold bend pipe with small radius of curvature device, and push rod and hinge plug push former pipe in the inner tube of a tyre and the optimized carcass path and the bend pipe state that forms, and back-stop mechanism is depressed the enforcement profile that makes it to pass through by the inclined-plane by bend pipe.

Fig. 3 is the section and the end view drawing of the former pipe of the utility model.

According to the utility model accompanying drawing the cold bend pipe with small radius of curvature device is further described below:

See accompanying drawing 1, hinge plug (1) adopts three garden column type hinge joints identical with radius of curvature, is connected by carrier bar (11) between the hinge joint, and connected mode is to adopt carrier bar axle (7) to constitute flexible hanger plug (1).

Push rod (2) adopts connecting rod (8) to be connected with hinge plug (1).

Fairlead (3) docks with the outer rim of the inner tube of a tyre (4) and an end of cover tire (6), constitutes the input channel of former pipe (9).

The inner tube of a tyre (4) constitutes the required bending channel of bend pipe with cover tire (6).

Back-stop mechanism (5) is contained between cover tire (6) and the fairlead (3), and back-stop mechanism (5) itself has spring (10), make former pipe (9) by the time depress the spring (10) of back-stop mechanism (5), push rod (2) drives hinge plug (1) and returns.

See Fig. 2, the enforcement of cold bend pipe with small radius of curvature device, be with former pipe (9) push be processed into elbow in the bend pipe passage after, push rod (2) is retracted by hydraulic cylinder, hinge plug (1) also is drawn out in the bending channel simultaneously, become linear state by curve state, continue in fairlead (3), to shift out, in the time placing a former pipe (9) till.Former pipe (9) is placed in the fairlead (3), push rod (2) pushes bending channel to former pipe (9) and hinge plug (1) again.Depress back-stop mechanism (5) simultaneously former pipe (9) is entered in the bending channel with hinge plug (1), form the elbow of required curvature, will bend good elbow simultaneously and eject bending channel, finished a working cycles, the rest may be inferred in processing later on.

See Fig. 3, the section and the end view drawing of former pipe (9).

Processing cold push away small curvature radius bend pipe before, at first former pipe is processed into trapezoidal former pipe (9), does not wait at two base angles, the α angle is 60 °, the β angle is 48 °.

Claims

1, the utility model is a kind of device that is used for the bend pipe moulding, its inner tube of a tyre (4), cover tire (6) constitute the bending channel of the required curvature of former pipe (9), fairlead (3) is communicated with aforesaid bending channel, push rod (2) pushes former pipe (9), it is characterized in that: the cold bend pipe with small radius of curvature shaped device has hinge plug (1) and back-stop mechanism (5).

2, cold bend pipe with small radius of curvature shaped device according to claim 1 is characterized in that: hinge plug (1) has 3 to 4 garden column type hinge joints identical with radius of curvature, is connected by carrier bar (11) between the hinge joint.

3, cold bend pipe with small radius of curvature building mortion according to claim 2 is characterized in that: connect with carrier bar axle (7) between hinge joint and the carrier bar (11).

4, cold bend pipe with small radius of curvature shaped device according to claim 1 is characterized in that: hinge plug (1) has the connecting rod (8) that is connected with push rod (2).

5, cold bend pipe with small radius of curvature shaped device according to claim 1 is characterized in that: back-stop mechanism (5) has 1 spring (10).