CN2363799Y

CN2363799Y - End drawing case

Info

Publication number: CN2363799Y
Application number: CN 99231154
Authority: CN
Inventors: 武湘川
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-18
Filing date: 1999-03-18
Publication date: 2000-02-16
Anticipated expiration: 2009-03-18

Abstract

The utility model discloses an end drawing case which is suitable for drawing tube blanks. The utility model comprises a case body and a main beam which is arranged in the case body. The main beam is driven by a main oil cylinder, a radial direction outer hole groove on the other end surface of the main beam is provided with a block clamping ring, the block clamping ring can slide on the inclined surface of an inclined pad, the block clamping ring is extruded by the inclined surface with the movements of the main beam and produces radial direction movements, and the purposes of clamping the outer wall of a tube blank end tightly and transmitting drawing force are achieved. Tube blanks can be clamped tightly, and the drawing is carried out without processing tube blank ends in the process of production, so the rate of finished products and the production efficiency are raised, the losses are reduced, and the production cost is lowered.

Description

Drawhead box

The utility model relates to a kind of drawhead box that is used for steel pipe's production, particularly is suitable for the draw and the finishing of steel pipe.

Existing technology is in the steel pipe process of tube plug drawing mill, all be to adopt the clamping device of jaw formula to transmit draw power, be characterized in before steel pipe base draw, at first the base head to be flattened, form homalocephalus, just be beneficial to clamping device and clamp, pipe is carried out draw, because the pipe homalocephalus can not produce production tube, ratio defective product is lower, and loss is quite big.Special-purpose pipe head also need be set in addition flatten equipment, correspondingly increase production cost, reduce production efficiency.

The purpose of this utility model is to provide a kind of and can the pipe head not be handled, and just can clamp the drawhead box that the pipe head carries out draw.

The purpose of this utility model realizes by following structure: it comprises the casing of being with inner chamber and the girder that is installed in the cabinets cavity wall; The rear end face of girder links to each other with master cylinder, and the girder front end face has more than two radially outer hole groove, and the fixture block ring on band inclined-plane is installed in this outer hole groove; Taper liner is installed on the casing, and taper liner is with cooperating for dovetail groove between the clamp ring piece.

The center that the utility model also is included in girder is equipped with fixed central spindle.In order to adapt to the pipe of different-diameter, the internal diameter of fixture block ring is provided with pad.The fixture block ring is made up of fixture block, and fixture block quantity is preferably three.

As further improvement of the utility model, it also includes movable mandrel, and movable mandrel comprises the fixture block ring that is installed in two above radial bore grooves of girder, and the auxiliary oil cylinder and the top that is installed in this auxiliary oil cylinder piston rod head that are installed in the girder front end face.The snap ring piece is made up of fixture block, and fixture block quantity is preferably three.In order to adapt to the pipe of different-diameter, on the external diameter of fixture block ring, be provided with pad.The outer circumferential position of fixture block ring is equipped with spring along axis direction.Be provided with guider between auxiliary oil cylinder and the described top.

The utlity model has and can improve the finished product rate, the advantage that reduces the wastage, the flattening equipment that the while does not need to be provided with the pipe head has reduced production cost.

Below in conjunction with accompanying drawing drawhead box of the present utility model is described in further detail.

Fig. 1 is the main cutaway view of an embodiment of the present utility model.

Fig. 2 is that the A of an embodiment of the present utility model is to view.

Fig. 3 is the front view of another embodiment of the present utility model.

Fig. 4 is that B shown in Figure 3 is to view.

Fig. 5 is the front view of another embodiment of the present utility model.

Fig. 6 is that C shown in Figure 5 is to view.

Be denoted as among the figure: 1, casing, 2, master cylinder, 3, taper liner, 4, girder, 5, fixed central spindle, 6, fixture block, 7, guider, 8, auxiliary oil cylinder, 9, spring, 10, the top, 11, fixture block, 12, the fixture block ring, 13, the fixture block ring, 14, outer hole groove, 15, interior hole slot.

In Fig. 1, embodiment shown in Figure 2, drawhead box has the casing 1 of a band inner chamber, and girder 4 is installed in the inner chamber of casing 1, and along with the stretching of master cylinder 2 that is installed on the casing 1 moved in this inner chamber.Fixture block ring 13 is installed in the radially outer hole groove 14 of girder 4, and fixture block ring 13 is by being that the internal diameter that fan-shaped fixture block 6 combines is the cone of circle hole shape with the identical radial section of outer hole groove 14 quantity.The quantity of fixture block 6 is preferably three.The conical surface of fixture block ring 13 cooperates with the inclined-plane that is installed in the taper liner 3 in casing 1 inner chamber, and fit system is that dovetail groove cooperates.During work, when master cylinder 2 oil-feeds, the piston rod of master cylinder 2 stretches out and drives girder 4 reaches, fixture block ring 13 slides on taper liner 3 inclined-planes and is subjected to the effect of dovetail groove radial load and produces radial displacement along outer hole groove 14, fixture block ring 13 internal diameters diminish and block pipe head outer wall, transmit draw power, and drawhead box integral body is moved on the frame slide then, spur pipe, reach the purpose of draw pipe.In order to adapt to different pipe diameters, can on the internal diameter of fixture block ring 13, pad be set.

In Fig. 3 and another embodiment shown in Figure 4, if the distortion of pipe head is bigger, on the basis of embodiment illustrated in figures 1 and 2, also can adopt fixed central spindle 5, fixed central spindle 5 is installed in the center of girder 4, and in implementation process, fixed central spindle 5 stretches in the internal diameter of pipe, limit the distortion of pipe head, also just can carry out the pipe draw better.

In Fig. 5 and embodiment shown in Figure 6, it comprises casing 1, girder 4, master cylinder 2, fixture block ring 13 and taper liner 3 equally, and has replaced fixed central spindle 5 by movable mandrel on Fig. 3, embodiment basis shown in Figure 4.The structure of movable mandrel is such: also have more than two as shown in Figure 5 radial bore groove 15 at girder 4 front end faces, corresponding fixture block ring 12 is installed in interior hole slot 15, and fixture block ring 12 is to be that the endoporus that fan-shaped fixture block 11 is combined into is the cylinder of taper by quantity with interior hole slot 15 identical radial sections.Fixture block 11 preferably has three, and the external diameter of fixture block ring 12 is less than the internal diameter of fixture block ring 13, and endoporus conical surface Tongan City of fixture block ring 12 is contained in the also dovetail groove form cooperation of inclined-plane of the top 10 of auxiliary oil cylinder 8 piston rod heads on the girder 4.In implementation process, when auxiliary oil cylinder 8 piston rods stretch out, the inclined-plane dovetail groove of top 10 produces along interior hole slot 15 fixture block ring 12 and moves radially, thereby external diameter becomes big chucking pipe head inwall.So the embodiment that present embodiment is shown in Figure 1 relatively can transmit bigger draw power, and the distortion of pipe head is less, the draw and the finishing that are suitable for producing heavy caliber and thin-walled pipe.

In the embodiment shown in fig. 5, for guarantee to come directly towards 10 and fixture block ring 12 between slip steady, in auxiliary oil cylinder 8 outsides, can add guider 7 between top 10 and the girder 4, as fairlead, guide post etc.For fixture block ring 12 is better resetted, can also along axis direction spring 9 be set in addition behind auxiliary oil cylinder 8 retractions at fixture block ring 12 circumferential positions.

In Fig. 1, Fig. 3 and embodiment shown in Figure 5, for the draw of the pipe that satisfies various outer diameter and wall thickness, can change taper liner 3 respectively, increasing replaceable shim on the internal diameter of fixture block ring 13 or on the external diameter of fixture block ring 12.

Claims

1, a kind of drawhead box is characterized in that: it comprises the casing (1) of being with inner chamber and is installed in girder (4) in casing (1) internal chamber wall; The same master cylinder of rear end face (2) of girder (4) links to each other, and girder (4) front end face has more than two radially outer hole groove (14), and the fixture block ring (13) on band inclined-plane is installed in this outer hole groove (14); Taper liner (3) is installed on the casing (1), and taper liner (3) is with cooperating for dovetail groove between the clamp ring piece (13).

2, drawhead box according to claim 1 is characterized in that: in the center of girder (4) fixed central spindle (5) is installed.

3, drawhead box according to claim 1 is characterized in that: the internal diameter of fixture block ring (13) is provided with pad.

4, drawhead box according to claim 1 is characterized in that: described fixture block ring (13) is made up of fixture block (6), and fixture block (6) quantity is preferably three.

5, according to claim 1,3 or 4 described drawhead boxes, it is characterized in that: it also has movable mandrel, movable mandrel comprises the fixture block ring (12) that is installed in (4) two above radial bore grooves of girder (15), and is installed in the auxiliary oil cylinder (8) of girder (4) front end face and is installed in the top (10) of this auxiliary oil cylinder (8) piston rod head.

6, drawhead box according to claim 5 is characterized in that: described snap ring piece (12) is made up of fixture block (11), and fixture block (11) quantity is preferably three.

7, drawhead box according to claim 5 is characterized in that: be provided with pad on the external diameter of fixture block ring (12).

8, drawhead box according to claim 5 is characterized in that: the outer circumferential position of described fixture block ring (12) is equipped with spring (9) along axis direction.

9, drawhead box according to claim 5 is characterized in that: be provided with guider (7) between described auxiliary oil cylinder (8) and described top (10).