Special-shaped flange fixing clamp device

Abstract

The utility model relates to a special-shaped flange fixing clamp device which comprises clamping arms fixedly connected with clamping jaws of a lathe chuck, clamping spaces are formed between the clamping arms, and the clamping diameter of the clamping ends is smaller than or equal to that of the clamping jaws. The length of the clamping jaws is increased through the clamping arms, so that the end, facing the flange, of the connecting pipe is directly clamped, the end, facing the flange, of the connecting pipe is prevented from deviating, and the clamping device is simple, efficient, safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to flange production technical field especially a kind of special-shaped flange fixing clamp device. BACKGROUND

[0002] Long-neck flange and pipe flange surfacing sealing surface processing is an important task in lathe work. In the past, such workpieces are fixed by lathe chuck and center stand respectively when processing, but due to the length of the existing lathe chuck jaw extending along the chuck axis is relatively short, when welding and processing the pipe flange with relatively long length, it is often only possible to clamp the end of the pipe far from the flange, which leads to the end of the pipe towards the flange being far away from the jaw, thus causing the end of the pipe towards the flange to easily deviate, and thus it is necessary to spend a long time to correct the pipe; and slight deviation in straightness of the pipe flange welding position will cause the flange sealing surface cutting amount to be different, and the flange thickness and sealing surface to be uneven, affecting product quality; at the same time, the end of the pipe close to the flange will deviate more during the rotation of the chuck, and even seriously cause the pipe to be separated from the clamping of the jaw.

[0003] Therefore, a fixing clamp device is needed which can directly clamp the end of the pipe close to the flange. SUMMARY

[0004] The utility model provides a kind of fixing clamp device for the length of jaw being increased by clamping arm, so as to directly clamp the end of the pipe close to the flange, and then avoid the end of the pipe close to the flange from deviating, which is simple, efficient, safe and reliable, and easy to operate.

[0005] The utility model is realized by the following technical solutions, provides special-shaped flange fixing clamp device, including the clamping arm being fixed with each jaw of lathe chuck, the clamping space is formed between the clamping end of each clamping arm, and the clamping diameter of clamping end is less than or equal to the clamping diameter of jaw.

[0006] The pipe is placed between the jaws and extends along the axis of the chuck, and the length of the jaw along the axis of the chuck is increased by the clamping arm, so that the end of the pipe far from the flange is placed more between the clamping end and the chuck, and then the end of the pipe towards the flange can be directly clamped by the clamping end; the length of the jaw is increased by the clamping arm, so that the end of the pipe towards the flange can be directly clamped, and then the end of the pipe close to the flange is prevented from deviating.

[0007] As an optimization, a screw hole extending towards the axis of the chuck is provided at the end of the clamping arm away from the clamping end, and a jack screw adapted to the threads of the screw hole is arranged in the screw hole; the end of the workpiece away from the clamping end is clamped by the jack screw to prevent the end of the workpiece away from the clamping end from deviating.

[0008] As optimization, the clamping end is fixed with a clamping block, and a clamping surface matched with the workpiece is formed on the clamping block, and the clamping diameter of the clamping surface is less than or equal to the clamping diameter of the clamping end; the contact area between the clamping arm and the workpiece is increased through the clamping surface, so that the workpiece is prevented from slipping.

[0009] As optimization, the end of the clamping arm towards the claw is provided with a cutting surface matched with the end of the claw towards the clamping arm; the connection strength between the clamping arm and the claw is increased by matching the end of the clamping arm close to the claw with the claw.

[0010] As optimization, the clamping surface is provided with anti-skid lines; the workpiece is prevented from slipping through the anti-skid lines.

[0011] As optimization, a plurality of weight reduction holes are formed on the clamping arm; the weight of the clamping arm is reduced through the weight reduction holes, so that the rotational inertia of the clamping arm is reduced.

[0012] As optimization, the weight reduction hole penetrates the clamping arm, and the axis of the weight reduction hole extends along the circumference of the chuck and / or is inclined along the circumference of the chuck; the resistance received by the clamping arm when rotating is reduced through the weight reduction hole penetrating the clamping arm.

[0013] The beneficial effects of the utility model are that: the length of the claw is increased through the clamping arm, so that the end of the directly connected pipe towards the flange is clamped, and then the end of the pipe close to the flange is prevented from deviating; the end of the workpiece away from the clamping end is clamped through the jack screw, and the end of the workpiece away from the clamping end is prevented from deviating. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a use state diagram of the utility model;

[0016] As shown in the figure:

[0017] 1, lathe, 2, chuck, 3, claw, 4, clamping arm, 5, clamping block, 6, jack screw, 7, anti-skid line, 8, weight reduction hole. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the technical features of the scheme, the scheme will be described below through specific embodiments.

[0019] As shown in the figure: Figure 1 And Figure 2 The special-shaped flange fixing clamp device of the utility model, including the clamping arm 4 fixed with each claw 3 of the lathe 1 chuck 2, the clamping space is formed between the clamping ends of each clamping arm 4, and the clamping diameter of the clamping end is less than or equal to the clamping diameter of the claw 3.

[0020] The lathe 1, the chuck 2 and the chuck jaw 3 are prior art, the chuck 2 is arranged on the lathe 1, the chuck 2 can adopt the chuck 2 with different number of chuck jaws 3 such as three-jaw chuck, four-jaw chuck or six-jaw chuck; the clamping arm 4 extends along the axial direction of the chuck 2, the clamping arm 4 can be fixed on the chuck jaw 3 by different ways such as welding, bolt, etc., the clamping arm 4 is fixed on the chuck jaw 3 far away from the chuck 2 by the way of welding in the present scheme; the clamping end of the clamping arm 4 is located at the part of the clamping arm 4 far away from the chuck jaw 3 and close to the axis of the chuck 2; the clamping diameter of the clamping end is the diameter of the workpiece clamped by the clamping end, the clamping diameter of the chuck jaw 3 is the diameter of the workpiece clamped by the chuck jaw 3; the lathe 1 is provided with a center rest and a cutting device, the center rest is located on the axis of the chuck 2 and on the side facing the chuck jaw 3, the flange is fixed on the center rest of the lathe 1; the pipe is clamped on the clamping arm 4, the flange is clamped on the center rest, the pipe and the flange can be cut by the cutting device after the pipe and the flange are welded.

[0021] The pipe is placed between the clamping arms 4, and the end of the pipe facing the flange is located between the clamping ends, and the end of the pipe far away from the flange faces the chuck 2; the chuck jaw 3 is driven to move towards the axis of the chuck 2, the chuck jaw 3 drives the clamping arm 4 to move synchronously towards the axis of the chuck 2, until the clamping ends complete the clamping of the pipe; the chuck jaw 3 is driven to move towards the direction away from the axis of the chuck 2, the chuck jaw 3 drives the clamping arm 4 to move synchronously towards the direction away from the axis of the chuck 2, until the pipe completely separates from the clamping ends.

[0022] As shown in Figure 1 and Figure 2 the end of the clamping arm 4 far away from the clamping end is provided with a screw hole extending towards the axis of the chuck 2, a jack 6 with screw thread matched with the screw thread of the screw hole is arranged in the screw hole; the axis of the screw hole is perpendicular to the axis of the chuck 2.

[0023] When the pipe is clamped for the first time, after the clamping ends complete the clamping of the pipe, the jack 6 is rotated, the jack 6 moves along the axial direction of the screw hole towards the axis of the chuck 2, until the end of the jack 6 facing the axis of the chuck 2 completes the clamping of the pipe, and the rotation of the jack 6 is stopped; after the pipe and the flange are processed, the chuck jaw 3 is driven to move towards the direction away from the axis of the chuck 2, the chuck jaw 3 drives the jack 6 to move synchronously towards the direction away from the axis of the chuck 2 through the clamping arm 4, until the pipe completely separates from the clamping ends and the jack 6; a new pipe is replaced and the chuck jaw 3 is driven to move towards the axis of the chuck 2, the chuck jaw 3 drives the jack 6 to move synchronously towards the axis of the chuck 2 through the clamping arm 4, until the clamping ends and the jack 6 complete the clamping of the pipe; when different models of pipes need to be processed, the jack 6 is rotated in the opposite direction, the jack 6 moves along the axial direction of the screw hole towards the direction away from the axis of the chuck 2, and then the steps of clamping the pipe for the first time are repeated.

[0024] As shown in Figure 1 and Figure 2The clamping end is fixed with a clamping block 5, the clamping block 5 is provided with a clamping surface matched with the workpiece, and the clamping diameter of the clamping surface is less than or equal to the clamping diameter of the clamping end; the clamping surface is an arc curved surface, and the axis of the arc curved surface is parallel to the axis of the chuck 2.

[0025] The clamping arm 4 drives the clamping block 5 to move towards the axis of the chuck 2 until the clamping surface completes the clamping of the connecting pipe; the clamping arm 4 drives the clamping block 5 to move away from the axis of the chuck 2, and the connecting pipe is completely separated from the clamping surface.

[0026] As shown in the drawings, Figure 1 The clamping arm 4 is provided with a cutting surface matched with the end of the claw 3 towards the clamping arm 4.

[0027] The end of the clamping arm 4 close to the claw 3 is arranged in close contact with the end of the claw 3 close to the clamping arm 4, and the contact parts of the claw 3 and the clamping arm 4 are welded.

[0028] As shown in the drawings, Figure 1 The clamping surface is provided with anti-skid lines 7.

[0029] As shown in the drawings, Figure 1 The clamping arm 4 is provided with a plurality of weight-reducing holes 8.

[0030] As shown in the drawings, Figure 1 The weight-reducing hole 8 penetrates the clamping arm 4, and the axis of the weight-reducing hole 8 extends and / or is inclined along the circumference of the chuck 2; the axis of the weight-reducing hole 8 is perpendicular to the axis of the chuck 2, and the axis of the weight-reducing hole 8 extends along the circumference of the chuck 2.

[0031] In actual production process, the connecting pipe is placed between the clamping arms 4, and the end of the connecting pipe towards the flange is located between the clamping ends, and the end of the connecting pipe away from the flange is towards the chuck 2; the claw 3 is driven to move towards the axis of the chuck 2, the claw 3 drives the clamping arm 4 to move towards the axis of the chuck 2 synchronously, until the clamping end completes the clamping of the connecting pipe; the claw 3 is driven to move away from the axis of the chuck 2, the claw 3 drives the clamping arm 4 to move away from the axis of the chuck 2 synchronously, until the connecting pipe is completely separated from the clamping end.

[0032] When the connecting pipe is clamped for the first time, the connecting pipe is placed between the clamping arms 4, and the end of the connecting pipe towards the flange is located between the clamping ends, and the end of the connecting pipe away from the flange is towards the chuck 2; the claw 3 is driven to move towards the axis of the chuck 2, the claw 3 drives the clamping arm 4 to move towards the axis of the chuck 2 synchronously, until the clamping surface completes the clamping of the connecting pipe; the top wire 6 is rotated, the top wire 6 moves along the axis of the screw hole towards the axis of the chuck 2, until the end of the top wire 6 towards the axis of the chuck 2 completes the clamping of the connecting pipe, and the rotation of the top wire 6 is stopped.

[0033] After the processing of the pipe and the flange is completed, the driving jaw 3 moves towards the direction away from the axis of the chuck 2, the jaw 3 drives the jackscrew 6 and the clamping block 5 to move towards the direction away from the axis of the chuck 2 synchronously through the clamping arm 4 until the pipe is completely separated from the clamping surface and the jackscrew 6; a new pipe is replaced and the driving jaw 3 moves towards the axis of the chuck 2, the jaw 3 drives the jackscrew 6 and the clamping block 5 to move towards the axis of the chuck 2 synchronously through the clamping arm 4 until the clamping surface and the jackscrew 6 complete the clamping of the pipe.

[0034] When pipes of different types need to be processed, the jackscrew 6 is reversely rotated, the jackscrew 6 moves along the screw hole in the axial direction towards the direction away from the axis of the chuck 2, and then the steps of clamping the pipe for the first time are repeated.

[0035] Of course, the above description is not limited to the above examples, and the technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here; the above embodiments and the drawings are only used to illustrate the technical scheme of the utility model and are not a limitation on the utility model, the utility model is described in detail with reference to the preferred embodiments, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. A special-shaped flange fixing clamp device, characterized in that: It includes clamping arms (4) that are fixedly connected to each jaw (3) of the chuck (2) of the lathe (1), and a clamping space is formed between the clamping ends of each clamping arm (4); and the clamping diameter of the clamping end is less than or equal to the clamping diameter of the jaw (3).

2. The irregular flange fixing clamp device according to claim 1, characterized in that: The clamping arm (4) has a screw hole extending toward the axis of the chuck (2) at one end away from the clamping end, and a set screw (6) that matches the thread of the screw hole is rotated inside the screw hole.

3. The irregular flange fixing clamp device according to claim 1, characterized in that: A clamping block (5) is fixedly connected to the clamping end. The clamping block (5) has a clamping surface that is compatible with the workpiece, and the clamping diameter of the clamping surface is less than or equal to the clamping diameter of the clamping end.

4. The irregular flange fixing clamp device according to claim 1, characterized in that: The clamping arm (4) has a cross-section that matches the end of the clamping arm (4) facing the chuck (3).

5. The irregular flange fixing clamp device according to claim 3, characterized in that: The clamping surface is provided with anti-slip texture (7).

6. The irregular flange fixing clamp device according to claim 1, characterized in that: Multiple weight-reducing holes (8) are provided on the clamping arm (4).

7. The irregular flange fixing clamp device according to claim 6, characterized in that: The weight reduction hole (8) passes through the clamping arm (4), and the axis of the weight reduction hole (8) extends circumferentially along the chuck (2) and / or is inclined circumferentially along the chuck (2).

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