A elbow clamp with angle correction function

Abstract

The application discloses a bend clamp with an angle correction function, which comprises a loading and unloading station bottom plate, a guide rod assembly and an upper fixed crossbeam, the top of the loading and unloading station bottom plate is provided with the guide rod assembly, the top of the guide rod assembly is provided with the upper fixed crossbeam, the top of the loading and unloading station bottom plate is provided with an angular cylinder, the output end of the angular cylinder is connected with a V-shaped block, and the bottom of the loading and unloading station bottom plate is provided with a base. Through the setting of the clamp mother plate and the clamp daughter plate, the clamp zero point positioning assembly, the clamp mother plate, the clamp daughter plate and the V-shaped block, the angular cylinder is pushed to push the V-shaped block to position the inner hole center of a workpiece at a suitable height, a centering sleeve is conveniently put in, and the machining depth to the inner end surface of the workpiece is determined under the positioning effect of the connecting limiting rod.

Description

Technical Field

[0001] This invention relates to the field of elbow clamping equipment technology, specifically an elbow clamping device with angle correction function. Background Technology

[0002] During the manufacturing of existing pipelines, some pipelines require angle bending to meet different installation needs. This necessitates the use of elbow clamps, especially in oil and gas pipelines. Because the outer wall of the elbow structure is subject to greater wear and impact, the pipe blank needs to be designed with a thicker outer wall and a thinner inner wall. This results in a significant eccentricity between the centers of the inner and outer cross-sectional circles. After the blank is machined into an assembly-ready connector, the eccentricity between the centers of the inner and outer cross-sectional circles must be less than 0.5 mm, placing high demands on pre-processing positioning. Furthermore, while the pipe elbow blank is formed to a predetermined 90-degree angle through hot bending, temperature variations after hot bending can cause angle deviations. Finally, the two outlets of the elbow structure must form a 90-degree angle after machining, further emphasizing the need for precise clamp positioning.

[0003] The shortcomings of an existing elbow clamp with angle correction function are as follows:

[0004] 1. Comparative document CN209754599U discloses a tooling for processing pipe elbows, "including a base plate, a vertical plate, and two side plates. The vertical plate is perpendicularly connected to one side of the base plate to form an L-shaped structure. The two side plates are respectively parallel and perpendicularly arranged at both ends of the base plate, and both side plates are perpendicularly connected to the vertical plate. Two first screws are symmetrically arranged on the vertical plate along the horizontal direction. Several positioning bolts are provided at the lower part of the side plates. A clamping mechanism is provided at one end of the base plate near one of the side plates. A second screw is vertically arranged at the front end of the base plate. This invention has a simple structure, is easy to operate, improves processing efficiency, and ensures accuracy requirements." However, when processing elbows, the above device has a relatively simple structure, insufficient applicability of its clamping and fixing structure, cannot meet the processing needs of different types of workpieces, and has a low degree of automation.

[0005] 2. In the prior art, there is an elbow clamp with angle correction function. Most existing pipe elbow processing devices lack universality in their processing bases, which are not convenient for adjusting the processing angle of the workpiece during the processing. Moreover, it is difficult to maintain the concentricity of the outer ring and inner hole of most traditional workpieces during processing. Summary of the Invention

[0006] The purpose of this invention is to provide a bend clamp with angle correction function to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an elbow clamp with angle correction function, comprising a loading and unloading station base plate, a guide rod assembly and an upper fixed crossbeam, wherein the guide rod assembly is installed on the top of the loading and unloading station base plate and the upper fixed crossbeam is installed on the top of the guide rod assembly;

[0008] An angular cylinder is installed on the top of the loading and unloading station base plate, and a V-block is connected to the output end of the angular cylinder. A base is installed at the bottom of the loading and unloading station base plate, and a clamp mother plate is installed in the middle of the top of the base.

[0009] Preferably, an upper cylinder plate is installed on the top of the guide rod assembly, an upper cylinder is provided on the top of the upper cylinder plate, the output end of the upper cylinder is connected to a clamping arm assembly, and a centering sleeve telescopic cylinder is provided on one side of the clamping arm assembly.

[0010] Preferably, a clamp sub-plate is connected to the top of the clamp mother plate, a clamp zero-point positioning assembly is provided between the clamp mother plate and the clamp sub-plate, and a clamp pressure arm assembly is provided on the top of the clamp sub-plate.

[0011] Preferably, the output end of the centering sleeve telescopic cylinder is connected to a centering sleeve tensioning cylinder, and the output end of the centering sleeve tensioning cylinder is connected to a centering sleeve.

[0012] Preferably, the top of the clamp arm assembly is provided with a limit adjustment screw, and the top of the loading and unloading station base plate is provided with upper and lower limit rods, which are located below the clamp arm assembly.

[0013] Preferably, the bottom structure of the V-shaped block is an elastic structure.

[0014] Preferably, the surface of the clamping arm assembly is provided with toothed universal steel balls.

[0015] Preferably, connecting limit rods are arranged parallel to each other on both sides of the centering sleeve.

[0016] Preferably, a movable plate is connected to the outer surface of the centering sleeve, and the movable plate connects the guide rod assembly and the centering sleeve; the movable plate swings along the extension direction of the guide rod assembly.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. This invention, through the arrangement of a fixture mother plate, a fixture daughter plate, a fixture zero-point positioning component, a fixture mother plate, a fixture daughter plate, and a V-block, works in conjunction with an angular cylinder to push the V-block to pre-position the center of the workpiece's inner hole at a suitable height, ensuring that the center of the workpiece's inner hole is at the same height as the centering sleeve, facilitating the entry of the centering sleeve. Furthermore, under the positioning action of the connecting limit rod, the machining depth to the workpiece's inner end face is determined. The fixture pressure arm assembly is equipped with tightening bolts, and a preset preload is applied to the tightening bolts using a torque wrench to test the tightening degree, thereby ensuring the stability of workpiece machining. Its automated clamping function increases its applicability for workpiece clamping. The setting of the preload ensures clamping stability, guaranteeing the clamping degree even when the workpiece receives large cutting forces or requires a large feed rate on the machine tool.

[0019] 2. The present invention, through the setting of upper cylinder, upper and lower limit rods, centering sleeve telescopic cylinder and clamp arm assembly, after the device is processed, the clamp subplate and the workpiece fixed on the clamp in the target posture are transferred to the machine tool for processing by the robot arm. The machine tool is tilted and its angle can be adjusted. Thus, the workpiece processing surface can be facing upwards through such a machine tool, which is conducive to vertical cutting and convenient processing.

[0020] 3. In the fixture provided by this invention, all processes, from the pre-positioning of the workpiece by the V-block, the vertical and circumferential insertion and withdrawal of the centering sleeve, the retraction of the V-block, to the transportation of the positioned and clamped workpiece to the machine tool by the robot arm, can be fully automatically controlled and adjusted by the automatic control system (in some preferred embodiments, the automatic control system is a PLC control system). Only simple operation by the operator is required when applying the pre-tightening force through the torque wrench, which greatly reduces the manpower requirement and the ability requirement of the operator. The degree of automation is high, the probability of errors in the workflow is extremely low, and production efficiency and safety can be guaranteed. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a side view of the structure of the present invention;

[0023] Figure 3 This is a top view of the structure of the present invention;

[0024] Figure 4 This is a side view of the clamping arm structure of the present invention.

[0025] In the diagram: 1. Loading / unloading station base plate; 2. Guide rod assembly; 3. Upper fixed crossbeam; 4. Angle cylinder; 5. V-block; 6. Fixture mother plate; 7. Upper cylinder plate; 8. Upper cylinder; 9. Centering sleeve telescopic cylinder; 10. Fixture daughter plate; 11. Fixture zero-point positioning assembly; 12. Fixture pressure arm assembly; 13. Centering sleeve tensioning cylinder; 14. Centering sleeve; 15. Limit adjustment screw; 16. Upper and lower limit rods; 17. Connecting limit rod; 18. Movable plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example 1:

[0030] Please see Figure 1-4According to one embodiment of the present invention, an elbow clamp with angle correction function includes a loading and unloading station base plate 1, a clamp mother plate 6, and a clamp pressure arm assembly 12. The surface of the clamp pressure arm assembly 12 is provided with toothed universal steel balls. A guide rod assembly 2 is installed on the top of the loading and unloading station base plate 1. An upper fixed crossbeam 3 is installed on the top of the guide rod assembly 2. An angle cylinder 4 is installed on the top of the loading and unloading station base plate 1. The output end of the angle cylinder 4 is connected to a V-block 5. The bottom structure of the V-block 5 is an elastic structure. A base is installed on the bottom of the loading and unloading station base plate 1. The clamp mother plate 6 is installed in the middle of the top of the base. A clamp sub-plate 10 is connected to the top of the clamp mother plate 6. A clamp zero-point positioning assembly 11 is provided between the clamp mother plate 6 and the clamp sub-plate 10. The clamp pressure arm assembly 12 is provided on the top of the clamp sub-plate 10.

[0031] With the fixture mother plate 6, fixture daughter plate 10, fixture zero-point positioning component 11, fixture mother plate 6, fixture daughter plate 10 and V-block 5 set up, the V-block 5 is pushed by the angular cylinder 4 to position the center of the inner hole of the workpiece at a suitable height, so as to facilitate the entry of the centering sleeve 14. Under the positioning action of the connecting limit rod 17, the machining depth to the inner end face of the workpiece is determined. The fixture pressure arm component 12 is equipped with a constant torque bolt for testing the tightening degree, thereby ensuring the stability of workpiece machining. Its automated clamping function increases its applicability to workpiece clamping.

[0032] Example 2:

[0033] Please see Figure 1-4 According to one embodiment of the present invention, an elbow clamp with angle correction function includes an upper cylinder plate 7, a centering sleeve telescopic cylinder 9, and upper and lower limit rods 16. The upper cylinder plate 7 is installed on the top of the guide rod assembly 2, and an upper cylinder 8 is provided on the top of the upper cylinder plate 7. The output end of the upper cylinder 8 is connected to a clamp arm assembly. A centering sleeve telescopic cylinder 9 is provided on one side of the clamp arm assembly. A centering sleeve tensioning cylinder 13 is connected to the output end of the centering sleeve telescopic cylinder 9. A centering sleeve tensioning cylinder 13 is connected to the output end of the centering sleeve tensioning cylinder 13. A centering sleeve 14 is connected to the outer surface of the centering sleeve 14. A movable plate 18 is connected to the surface of the movable plate 18 and is connected to the bottom of the guide rod assembly 2. Connecting limit rods 17 are arranged parallel to each other on both sides of the centering sleeve 14. A limit adjusting screw 15 is provided on the top of the clamp arm assembly. The upper and lower limit rods 16 are provided on the top of the loading and unloading station base plate 1 and are located below the clamp arm assembly.

[0034] With the setup of an upper cylinder, upper and lower limit rods, centering sleeve telescopic cylinder, and clamp arm assembly, after processing, the device uses a robotic arm to transfer the clamp subplate 10 and the workpiece fixed in the clamp in the target posture to the machine tool for processing. The machine tool is tilted, and its angle can be adjusted, so that the processing surface of the workpiece can face upwards, which is convenient for processing.

[0035] The detailed description of known functions and components is omitted in this disclosure. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of commercially available instruments.

[0036] In this invention, the working steps of the device are as follows:

[0037] The blank workpiece is pre-positioned on the fixture by a V-block 5 with an elastic bottom. The V-block 5 positions the center of the workpiece's inner hole at a suitable height, facilitating the entry of the centering sleeve 14. The positioning of the workpiece's inner hole center by the centering sleeve and the fixed positional relationship between the centering sleeve and the fixture ensure the relative positional relationship between the workpiece's inner hole center and the machine tool after the fixture enters the machine tool, guaranteeing that the workpiece's inner hole center and the center of the machined outer ring surface are absolutely concentric. The centering sleeve 14 moves downward to the target position via the guide rod assembly 2. The centering sleeve 14 is designed to work in conjunction with the movable plate 18. The movable plate 18 and the guide rod assembly 2 work together to achieve vertical movement, driving the centering sleeve 14 to move. The movable plate 18 can swing vertically, causing the centering sleeve 14 to swing vertically as well. The centering sleeve extends into the inner hole of the workpiece blank, and the connecting limit rod 17 is used for... The blank end face is held in place to determine the machining depth into the inner end face of the workpiece. After the centering sleeve 14 enters, before the centering sleeve 14 tightens, the V-block 5 needs to be retracted to adjust the posture of the blank workpiece and lock the clamping arm assembly 12. By setting the toothed universal steel ball, the positional stability and positioning accuracy between the clamping arm assembly 12 and the blank workpiece are increased, and the target posture locking of the blank workpiece is completed. The centering sleeve 13 is removed, and the clamping subplate 10 and the workpiece fixed on the clamp in the target posture are transferred to the machine tool for processing by the robot. The machine tool is tilted, and its angle can be adjusted. Thus, the machining surface of the workpiece can be facing upwards through such a machine tool, which is convenient for processing. The upper and lower limit rods 16 can limit the clamping arm assembly to prevent the clamping arm assembly from being too low. The limit adjustment screw 15 can adjust the height of the upper and lower limit rods 16. From the pre-positioning of the V-block on the workpiece, the vertical and circumferential insertion and withdrawal of the centering sleeve, the retraction of the V-block, to the transportation of the positioned and clamped workpiece to the machine tool by the robot arm, all processes can be fully automated through an automatic control system (in some preferred embodiments, a PLC control system is used). Only simple operations are required from the operator during the application of pre-tightening force by a torque wrench, greatly reducing manpower requirements and the skill requirements of the operator. The automation level is high, the probability of errors in the workflow is extremely low, and production efficiency and safety can be guaranteed.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bend clamp with angle correction function, comprising a loading / unloading station base plate (1), a guide rod assembly (2), and an upper fixed crossbeam (3), characterized in that: The top of the loading and unloading station base plate (1) is equipped with a guide rod assembly (2), and the top of the guide rod assembly (2) is equipped with an upper fixed crossbeam (3). An angular cylinder (4) is provided on the top of the loading and unloading station base plate (1). A V-block (5) is connected to the output end of the angular cylinder (4). A base is installed at the bottom of the loading and unloading station base plate (1). A clamp mother plate (6) is installed in the middle of the top of the base. The top of the guide rod assembly (2) is equipped with an upper cylinder plate (7), and the top of the upper cylinder plate (7) is provided with an upper cylinder (8). The output end of the upper cylinder (8) is connected to a clamp arm assembly, and a centering sleeve telescopic cylinder (9) is provided on one side of the clamp arm assembly. The top of the clamp mother plate (6) is connected to the clamp daughter plate (10), and a clamp zero-point positioning assembly (11) is provided between the clamp mother plate (6) and the clamp daughter plate (10). A clamp pressure arm assembly (12) is provided on the top of the clamp daughter plate (10). The output end of the centering sleeve telescopic cylinder (9) is connected to the centering sleeve tensioning cylinder (13), and the output end of the centering sleeve tensioning cylinder (13) is connected to the centering sleeve (14). The clamp arm assembly is provided with a limit adjustment screw (15) at the top, and the loading and unloading station base plate (1) is provided with an upper and lower limit rod (16) at the top, and the upper and lower limit rod (16) is located below the clamp arm assembly.

2. The elbow clamp with angle correction function according to claim 1, characterized in that: The bottom structure of the V-shaped block (5) is an elastic structure.

3. The elbow clamp with angle correction function according to claim 1, characterized in that: The surface of the clamp arm assembly (12) is provided with toothed universal steel balls.

4. The elbow clamp with angle correction function according to claim 1, characterized in that: The centering sleeve (14) has connecting limit rods (17) arranged parallel to each other on both sides.

5. The elbow clamp with angle correction function according to claim 1, characterized in that: The outer surface of the centering sleeve (14) is connected to a movable plate (18), which connects the guide rod assembly (2) and the centering sleeve (14); the movable plate (18) swings along the extension direction of the guide rod assembly (2).

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