Dovetail clamp for assisting in positioning and machining bent pipe

Abstract

The utility model relates to a dovetail clamp for assisting in positioning and machining a bent pipe. The dovetail clamp comprises a dovetail clamp body and an elbow fixing mechanism fixedly connected with the dovetail clamp body. The dovetail clamp comprises a front dovetail plate detachably connected with the elbow fixing mechanism, a middle dovetail plate detachably connected with the front dovetail plate, and a rear dovetail plate detachably connected with the middle dovetail plate; the middle dovetail plate is provided with an adjusting block A and an adjusting block B which can enable the middle dovetail plate to slide in the length direction of the dovetail groove A and the length direction of the dovetail groove B. The included angle between the inclined face of the dovetail sliding block A and the back face of the front dovetail plate and the included angle between the inclined face of the dovetail sliding block B and the back face of the middle dovetail plate are both 40-60 degrees. By adjusting the adjusting block A, the adjusting block B and the adjusting screw, the dovetail clamp is finely adjusted up and down as well as left and right, so that the center of a machining surface of a bent pipe is finely adjusted and positioned, and the problem that the center of the machining surface is difficult to accurately and efficiently align and position after the bent pipe is clamped is solved.

Description

Technical Field

[0001] The present application relates to the technical field of clamping and positioning, and in particular to a dovetail clamp for assisting in positioning and processing bent pipes. Background Art

[0002] The elbow is a high-pressure fluid control element in cementing and fracturing equipment. Its function is to withstand the pressure generated in the high-pressure pipeline, change the connection direction of the construction pipeline and facilitate pipeline connection. Its maximum rated working pressure can reach 138MPa. There are many production and processing procedures for elbows, involving forging, hot bending and other procedures. In the hot bending process, due to the influence of factors such as heating temperature, mold, bending speed, etc., the size of the blanks produced varies greatly. In addition, the deformation caused by heat treatment makes it impossible to quickly align the ordinary box-type tooling during machining. The operator must rely on the upper, lower, left and right screws on the ordinary box-type tooling to adjust it over and over again. Sometimes, the upper and lower centers have just been adjusted, and the left and right centers have moved again; sometimes, the left and right centers have just been adjusted, and the upper and lower centers have moved again. This is repeated several times to adjust the center, which is time-consuming and labor-intensive.

[0003] At the same time, during the processing of the pipe bend, the precision of all processing dimensions is required to be high, and the tolerance control range is 0.05-0.2mm. After rough processing, the processing allowance for the fine processing size is only 0.2mm on one side. Therefore, it is difficult for operators to accurately and efficiently align the center of the processing surface up, down, left, and right when processing the pipe bend. The time for alignment and positioning accounts for about 80% of the entire processing time, which brings great trouble to the processing efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present application proposes a dovetail clamp for assisting in positioning and processing bent pipes, which is capable of accurately fine-tuning the center of a processing surface.

[0005] The present application discloses a dovetail clamp for assisting in positioning and processing a bent pipe, comprising a dovetail clamp and an elbow fixing mechanism connected and fixed to the dovetail clamp; the dovetail clamp comprises a front dovetail plate detachably connected to the elbow fixing mechanism, a middle dovetail plate detachably connected to the front dovetail plate, and a rear dovetail plate detachably connected to the middle dovetail plate;

[0006] The surface of the front dovetail plate facing away from the elbow fixing mechanism is the back of the front dovetail plate, and a dovetail slider A is provided on the back of the front dovetail plate; the surface of the middle dovetail plate that is attached to the front dovetail plate is provided with a dovetail groove A that can slidably cooperate with the dovetail slider A, the surface of the middle dovetail plate that is attached to the rear dovetail plate is provided with a dovetail groove B, and the surface of the rear dovetail plate that is attached to the middle dovetail plate is provided with a dovetail slider B that can slidably cooperate with the dovetail groove B;

[0007] An adjusting block A and an adjusting block B are provided on the middle dovetail plate, which can enable the middle dovetail plate to slide along the length directions of the dovetail groove A and the dovetail groove B respectively. The included angles between the inclined surfaces of the dovetail slider A and the dovetail slider B and the back surfaces of the front dovetail plate and the middle dovetail plate are both 40° to 60°.

[0008] Furthermore, the dovetail sliders A and B of the dovetail fixture of the present utility model are both strip-shaped and are perpendicularly arranged to each other. The adjusting block A is respectively connected to the rear dovetail plate and the middle dovetail plate through adjusting screws and set screws, and the adjusting block B is respectively connected to the front dovetail plate and the middle dovetail plate through adjusting screws and set screws.

[0009] Furthermore, the elbow fixing mechanism of the dovetail fixture of the present utility model includes a frame through which a bent pipe can pass. An inclined surface A is provided on one side of the frame away from the dovetail clip. Bolts capable of fixing the bent pipe are respectively penetrated through the inclined surface A, the bottom of the frame, and the side of the frame close to the dovetail clip.

[0010] Furthermore, adjusting screws capable of enabling relative movement are respectively provided between the front dovetail plate, the middle dovetail plate, and the rear dovetail plate of the dovetail fixture of the present utility model.

[0011] Furthermore, the front dovetail plate, the middle dovetail plate, and the rear dovetail plate of the dovetail fixture of the present utility model are all cylindrical, and at least two through holes are symmetrically arranged along the center of the circle or axially symmetrically along the diameter on the front dovetail plate, the middle dovetail plate, and the rear dovetail plate.

[0012] Furthermore, the elbow fixing mechanism of the dovetail fixture of the present utility model is fixedly connected to the front dovetail plate through fixing screws.

[0013] Furthermore, grooves are provided on the two surfaces of the dovetail slider A that are in contact with the dovetail groove A, and on the two surfaces of the dovetail slider B that are in contact with the dovetail groove B.

[0014] Furthermore, chamfers are provided on both the dovetail slider A and the dovetail slider B of the dovetail fixture of the present utility model.

[0015] Advantages of this application:

[0016] The dovetail fixture for assisting in positioning and machining bent pipes in this application first adjusts the adjusting block A, adjusting block B, and adjusting screws to finely adjust the dovetail clamp vertically and horizontally, quickly aligning the center of the bent pipe machining surface with the center of the lathe spindle in a straight line. Secondly, the dovetail fixture can effectively solve the problem of the center of gravity offset of the fixture during the rotation of the lathe through counterweight; specifically, through the close cooperation of each component, through holes are drilled in the ineffective parts of each dovetail plate, effectively reducing the weight of each dovetail plate, thereby reducing the load-bearing burden on the machine tool. The dovetail fixture described in this application completely solves the human operation error and greatly improves the processing efficiency. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the dovetail fixture for assisting in positioning and machining bent pipes described in this application;

[0018] Figure 2 is the front view of the front dovetail plate described in this application;

[0019] Figure 3 is the left view of the front dovetail plate described in this application;

[0020] Figure 4 is the front view of the middle dovetail plate described in this application;

[0021] Figure 5 is the left view of the middle dovetail plate described in this application;

[0022] Figure 6 is the top view of the middle dovetail plate described in this application;

[0023] Figure 7 is the front view of the rear dovetail plate described in this application;

[0024] Figure 8 is the top view of the rear dovetail plate described in this application;

[0025] Wherein: 1, dovetail clamp; 2, elbow fixing mechanism;

[0026] 10, front dovetail plate; 20, middle dovetail plate; 30, rear dovetail plate; 40, fixing screw;

[0027] 101, dovetail slider A; 201, dovetail groove A; 202, dovetail groove B; 203, adjusting block A; 204, adjusting block B; 301, dovetail slider B;

[0028] 21, frame; 22, inclined surface A; 23, bolt. Detailed Embodiments

[0029] To make the objectives, technical solutions and advantages of the specific embodiments of this application clearer, the technical solutions in the specific embodiments of this application will be clearly and completely described below. For those not specifying specific conditions in the specific embodiments, they shall be carried out according to conventional conditions or conditions recommended by the manufacturer.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. Embodiment 1

[0031] As shown in Figures 1 to 8, a dovetail fixture for assisting in positioning and machining a bent pipe includes a dovetail clamp 1 and an elbow fixing mechanism 2 fixedly connected to the dovetail clamp 1; the dovetail clamp 1 includes a front dovetail plate 10 detachably connected to the elbow fixing mechanism 2, a middle dovetail plate 20 detachably connected to the front dovetail plate 10, and a rear dovetail plate 30 detachably connected to the middle dovetail plate 20;

[0032] The surface of the front dovetail plate 10 facing away from the elbow fixing mechanism is the back surface of the front dovetail plate 10, and a dovetail slider A 101 is provided on the back surface of the front dovetail plate 10; a dovetail groove A 201 capable of slidingly mating with the dovetail slider A 101 is provided on the surface of the middle dovetail plate 20 in contact with the front dovetail plate 10, a dovetail groove B 202 is provided on the surface of the middle dovetail plate 20 in contact with the rear dovetail plate 30, and a dovetail slider B 301 capable of slidingly mating with the dovetail groove B 202 is provided on the surface of the rear dovetail plate 30 in contact with the middle dovetail plate 20;

[0033] The middle dovetail plate 20 is provided with an adjusting block A 203 and an adjusting block B 204 that can enable the middle dovetail plate 20 to slide along the length directions of the dovetail groove A 201 and the dovetail groove B 202 respectively. In the present Embodiment 1, the dovetail slider A 101 and the dovetail slider B 301 are both strip-shaped and are arranged perpendicular to each other. The adjusting block A 203 is respectively connected to the rear dovetail plate 30 and the middle dovetail plate 20 through an adjusting screw A and a set screw A, and the adjusting block B 204 is respectively connected to the front dovetail plate 10 and the middle dovetail plate 20 through an adjusting screw B and a set screw B. Adjusting screws that can enable relative movement are further respectively arranged between the front dovetail plate 10, the middle dovetail plate 20, and the rear dovetail plate 30. The included angles between the inclined surfaces of the dovetail slider A 101 and the dovetail slider B 202 and the back surfaces of the front dovetail plate 10 and the middle dovetail plate 20 are both 40° to 60°. In the present Embodiment 1, the included angles between the inclined surfaces of the dovetail slider A 101 and the dovetail slider B 202 and the back surfaces of the front dovetail plate 10 and the middle dovetail plate 20 are both 55°.

[0034] In the present Embodiment 1, the connections between the adjusting screw A and the adjusting screw B and the adjusting block A and the adjusting block B are fixed through the set screw A and the set screw B of the side holes of the adjusting block A and the adjusting block B. The screw holes are positioned on the top surface of the rear dovetail plate 30 and the side surface of the front dovetail plate 10. The adjustment ranges of the adjusting screw A, the adjusting screw B, and the adjusting screw are all 1 to 15 mm.

[0035] The front dovetail plate 10, the middle dovetail plate 20, and the rear dovetail plate 30 are all cylindrical. In the present Embodiment 1, at least two through holes are symmetrically arranged along the center of the circle or axially symmetrically along the diameter on the front dovetail plate 10, the middle dovetail plate 20, and the rear dovetail plate 30. The elbow fixing mechanism and the front dovetail plate 10 are connected and fixed through a fixing screw 40. Grooves are opened on the two surfaces where the dovetail slider A 101 and the dovetail groove A 201 are in contact, and on the two surfaces where the dovetail slider B 301 and the dovetail groove B 202 are in contact. Chamfers are provided on both the dovetail slider A 101 and the dovetail slider B 301.

[0036] In the present Embodiment 1, the elbow fixing mechanism 2 includes a frame 21 that can allow a bent pipe to pass through. A slope A 22 is provided on one side of the frame 21 away from the dovetail clip 1. Bolts 23 for fixing the bent pipe are respectively penetrated through the slope A 22, the bottom of the frame 21, and the side of the frame 21 close to the dovetail clip 1.

[0037] When using the dovetail clamp for assisting in positioning and machining bent pipes according to the present utility model, the rear dovetail plate 30 is directly and firmly connected to the lathe flange through fixing screws. By adjusting the adjusting block A 203, the adjusting block B 204, as well as the adjusting screw A, the adjusting screw B and the adjusting screw, the dovetail clamp 1 can be finely adjusted up and down and left and right, so as to finely adjust and position the center of the machining surface of the bent pipe, and solve the problem that it is difficult to accurately and efficiently align and position the center of the machining surface after the bent pipe is clamped.

[0038] The embodiments described above are some embodiments of the present application, rather than all embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

Claims

1. A dovetail fixture for assisting in positioning and processing a pipe bend, characterized in that: It comprises a dovetail clamp (1) and an elbow fixing mechanism (2) connected and fixed to the dovetail clamp (1); the dovetail clamp (1) comprises a front dovetail plate (10) detachably connected to the elbow fixing mechanism (2), a middle dovetail plate (20) detachably connected to the front dovetail plate (10), and a rear dovetail plate (30) detachably connected to the middle dovetail plate (20); The surface of the front dovetail plate (10) facing away from the elbow fixing mechanism is the back side of the front dovetail plate (10), and a dovetail slider A (101) is provided on the back side of the front dovetail plate (10); the surface of the middle dovetail plate (20) abutting against the front dovetail plate (10) is provided with a dovetail groove A (201) capable of slidably cooperating with the dovetail slider A (101); the surface of the middle dovetail plate (20) abutting against the rear dovetail plate (30) is provided with a dovetail groove B (202); and the surface of the rear dovetail plate (30) abutting against the middle dovetail plate (20) is provided with a dovetail slider B (301) capable of slidably cooperating with the dovetail groove B (202); The middle dovetail plate (20) is provided with an adjustment block A (203) and an adjustment block B (204) capable of enabling the middle dovetail plate (20) to slide along the length direction of the dovetail groove A (201) and the dovetail groove B (202), respectively. The angles between the inclined surfaces of the dovetail slider A (101) and the dovetail slider B (301) and the back surface of the front dovetail plate (10) and the back surface of the middle dovetail plate (20) are both 40 to 60 degrees.

2. The dovetail fixture for assisting positioning and processing of bent pipes according to claim 1 is characterized in that: The dovetail slider A (101) and the dovetail slider B (301) are both long strips and are arranged perpendicular to each other. The adjustment block A (203) is connected to the rear dovetail plate (30) and the middle dovetail plate (20) respectively through an adjustment screw and a set screw, and the adjustment block B (204) is connected to the front dovetail plate (10) and the middle dovetail plate (20) respectively through an adjustment screw and a set screw.

3. The dovetail fixture for assisting positioning and processing of bent pipes according to claim 2, characterized in that: The elbow fixing mechanism (2) comprises a frame (21) through which the elbow can pass, a side of the frame (21) away from the dovetail clamp (1) is provided with an inclined surface A (22), and bolts (23) capable of fixing the elbow are respectively penetrated on the inclined surface A (22), the bottom of the frame (21), and the side of the frame (21) close to the dovetail clamp (1).

4. The dovetail fixture for assisting positioning and processing of bent pipes according to claim 3 is characterized in that: Adjustment screws are also provided between the front dovetail plate (10), the middle dovetail plate (20) and the rear dovetail plate (30) respectively, enabling them to move relative to each other.

5. The dovetail fixture for assisting positioning and processing of bent pipes according to claim 4, characterized in that: The front dovetail plate (10), the middle dovetail plate (20) and the rear dovetail plate (30) are all cylindrical, and at least two through holes are arranged on the front dovetail plate (10), the middle dovetail plate (20) and the rear dovetail plate (30) in a manner symmetrical along the center of the circle or symmetrical along the diameter axis.

6. The dovetail fixture for assisting positioning and processing of bent pipes according to claim 5, characterized in that: The elbow fixing mechanism and the front dovetail plate (10) are connected and fixed via fixing screws (40).

7. The dovetail fixture for assisting positioning and processing of pipe bends according to any one of claims 1 to 6, characterized in that: Grooves are provided on the two surfaces where the dovetail slider A (101) and the dovetail groove A (201) are in contact with each other, and on the two surfaces where the dovetail slider B (301) and the dovetail groove B (202) are in contact with each other.

8. The dovetail fixture for assisting positioning and processing of bent pipes according to claim 7, characterized in that: The dovetail slider A (101) and the dovetail slider B (301) are both provided with chamfers.

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