Semicircular arc groove hydraulic clamp for pipe fitting

Abstract

The invention relates to a semi-arc groove hydraulic clamp for a pipe fitting. The semi-arc groove hydraulic clamp comprises a bottom plate, a clamp body, a directional block, a positioning baffle, a fixing plate, a connecting block, an air cylinder, a pressing unit and a positioning unit. The clamp body is fixed on the bottom plate; the directional block is fixed on one side of the clamp body through a bolt; the positioning baffle is fixed at the front end of the orientation block through a bolt; the fixed plate is fixed on the clamp body through a bolt; the other end of the connecting block is connected with a piston rod of the air cylinder; the air cylinder is fixed to the connecting block and used for fixing the rear end of the pipe fitting. The pressing unit is fixed to the bottom plate, located on the right side of the clamp body and used for fixing the upper end of the pipe fitting. The positioning unit is arranged between the orientation block and the pressing unit and is used for positioning the pipe fitting; accurate positioning in the machining process can be achieved, the quality of machined pipe fittings is improved, machining procedures are reduced, and machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, and in particular to a semicircular arc groove hydraulic clamp for pipe fittings. Background Art

[0002] Semi-circular groove hydraulic clamps are commonly used to fix and clamp cylindrical objects such as pipes to maintain their stability and position during machining, welding or other processes. Such hydraulic clamps have a semi-circular groove design that can adapt to the curved surface of the pipe, ensuring that the clamping force is evenly distributed and stable without damaging the surface of the pipe.

[0003] Announcement No. CN118417813B discloses a tooling fixture device for a stainless steel pipe ring welding machine, including a frame, a clamping structure, a welding structure, a limiting structure, a fixing structure, an installation structure, a connection box, a guide column and a threaded hole; the fixing column in the limiting structure is engaged with the guide rod, so that the right connecting seat can be quickly fixed after the right connecting seat slides, thereby improving the adjustment efficiency of the right connecting seat; the three positioning rollers in the fixing structure clamp the right end of the stainless steel pipe, thereby improving the stability of the right side of the stainless steel pipe, and avoiding the misalignment between the two pipes caused by the tight contact between the right bent pipe and the stainless steel pipe when the stainless steel pipe is too long; the welding structure facilitates the cooperation with the welding gun to perform ring seam welding when the two pipes are rotated; the limiting rod in the installation structure is engaged with the positioning block, thereby facilitating the replacement of the mold, and replacing the mold facilitates the welding of cylindrical workpieces and bent pipes, thereby improving practicality.

[0004] However, in actual use, although the above solution can fix the pipe fittings to a certain extent, it is unable to perform all-round and accurate positioning of the pipe fittings with semi-circular grooves, which may lead to inaccurate milling of the semi-circular grooves in the later stage, reduce the dimensional accuracy of the pipe fittings after processing, and may also cause position displacement of the pipe fittings during the processing, affecting the processing quality and causing secondary processing, thereby reducing the processing efficiency. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a semi-circular arc groove hydraulic clamp for pipe fittings, so that pipe fittings with semi-circular arc grooves can be accurately positioned during the milling process, the quality of the pipe fittings after processing is improved, the processing steps are reduced, and the processing efficiency is improved.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: A semicircular arc groove hydraulic clamp for pipe fittings, comprising a bottom plate, a clamp body, an orientation block, a positioning baffle, a fixing plate, a connecting block, a cylinder, a pressing unit and a positioning unit; The clamp body is fixed on the bottom plate and is used to support and fix the pipe fittings; The directional block is fixed to one side of the clamp body by bolts to limit the movement of the pipe in the horizontal direction; The positioning baffle is fixed to the front end of the directional block by bolts to further limit the position of the pipe fitting; The fixing plate is fixed on the clamp body by bolts and is used to fix the connecting block and the cylinder; One end of the connecting block is connected to the fixing plate by bolts, and the other end is connected to the piston rod of the cylinder; The cylinder is fixed on the connecting block and is used to fix the rear end of the pipe fitting; The pressing unit is fixed on the bottom plate and is located on the right side of the clamp body, and is used to fix the upper end of the pipe fitting; The positioning unit is arranged between the orientation block and the pressing unit, and is used for positioning the pipe.

[0007] Further, the pressing unit includes a hydraulic cylinder, a pressing arm, a connecting rod and a supporting block; The hydraulic cylinder is fixed on the bottom plate and is used to drive the pressing arm to rotate, thereby fixing the pipe fitting; The pressing arm is rotatably connected to the telescopic rod of the hydraulic cylinder through a short pin and is used to press and fix the pipe fitting; The connecting rods are provided with two, arranged front and rear, one end of which is rotatably connected to the pressure arm through a long pin, and the other end of which is rotatably connected to the support block through a long pin; The support block is fixed on the upper end of the hydraulic cylinder and is located below the pressure arm, and is used to support the connecting rod.

[0008] Furthermore, the top end of the clamp body is a semicircular arc structure and the inside thereof matches the cylindrical structure of the pipe fitting.

[0009] Furthermore, the positioning unit includes an electric telescopic rod and a positioning block 1; The electric telescopic rod is fixed inside the directional block and is used to drive the positioning block to move and position the bottom of the pipe; The positioning block 1 is fixed to the telescopic end of the electric telescopic rod and is slidably connected in the orientation block, and is used for linear positioning of the right-angle structure at the bottom of the pipe fitting.

[0010] Preferably, one end of the positioning block that is positioned and matched with the bottom of the pipe is a pointed structure.

[0011] Preferably, the positioning unit further comprises a second positioning block, a connecting rod, a steel wire rope and a winding assembly; The second positioning block is positioned at the right-angle structure position of the upper end of the pipe fitting through a connecting rod; The connecting rod is an elastic telescopic structure, placed vertically, with one end fixed on the first positioning block and the other end fixed on the second positioning block; The steel wire rope passes through the front and rear ends of the second positioning block.

[0012] Preferably, the winding assembly comprises a bracket, a motor, a first reel and a second reel; The bracket is fixed on the hydraulic cylinder; The motor is placed horizontally and fixed on the vertical section of the bracket; The reel 1 is fixed on the bracket and connected to the output end of the motor, and is used to reel in the wire rope; The second reel is slidably connected to the inside of the clamp body through an electric slider, and is used to cooperate with the first reel to provide pulling force for the two ends of the positioning block 2.

[0013] Furthermore, the positioning unit also includes a balancing component for adjusting the force balance of the pipe during processing; The balancing assembly includes a moving block, a connecting spring, a pressing block and a return spring; The moving block is slidably connected to the inside of the clamp body via a connecting spring; The pressing block is slidably connected to the interior of the directional block via a return spring, and is used to cooperate with the moving block to apply pressure to the right end of the pipe fitting.

[0014] Preferably, one end of the moving block and the pressing block that cooperate with each other is provided with a guiding inclined surface.

[0015] Furthermore, the clamping block is a square structure and is made of rubber material to prevent damage caused by contact with the pipe fitting.

[0016] The beneficial effects of the present invention are as follows: by optimizing the overall structure of the clamp to make it more closely fit the structure of the pipe fitting, a hydraulic drive mode and a multi-component collaborative transmission mode are adopted, and through the coordinated action of the directional block, the positioning baffle and the positioning unit, all-round clamping and fixing of the front and rear ends and the upper and lower positions of the pipe fittings are achieved, ensuring the stability and positioning accuracy of the pipe fittings during the processing, and being able to efficiently and accurately position and clamp the pipe fittings, thereby improving the processing accuracy and quality, effectively solving the technical problems of inaccurate positioning during the processing, reducing the quality of the pipe fittings after processing, increasing the processing steps and reducing the processing efficiency in the prior art, and achieving the technical effects of accurate positioning during the processing, improving the quality of the pipe fittings after processing, reducing the processing steps and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Figure 2 It is a three-dimensional structural back view of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Figure 3 It is a schematic diagram of a state of a semicircular arc groove hydraulic clamp for a pipe fitting of the present invention before clamping the pipe fitting; Figure 4It is a front view of a clamp body, a pressing unit and a pipe fitting of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Figure 5 It is a partial enlarged schematic diagram of A of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Figure 6 A side view of a clamp body, a pressing unit and a pipe fitting of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Figure 7 It is a partial enlarged schematic diagram of position B of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Figure 8 It is a schematic diagram of the lateral stereoscopic structure of a clamping body of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Fig. 9 It is a partial enlarged schematic diagram of the C position of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Fig.10 It is a top cross-sectional view of a clamping body of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; Fig.11 It is a partial enlarged schematic diagram of the D position of a semicircular arc groove hydraulic clamp for pipe fittings of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 100, bottom plate, 110, clamping body, 120, directional block, 130, positioning baffle, 140, fixing plate, 150, connecting block, 160, cylinder, 200, pressing unit, 210, hydraulic cylinder, 220, pressing arm, 230, connecting rod, 240, supporting block, 300, positioning unit, 310, electric telescopic rod, 320, positioning block one, 330, positioning block two, 340, connecting rod, 350, wire rope, 360, winding assembly, 361, bracket, 362, motor, 363, reel one, 367, reel two, 370, balancing assembly, 371, moving block, 372, connecting spring, 373, pressing block, 374, reset spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present application, the term "for example" is used to mean "used as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details to obscure the description of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0021] See also Figure 1 , is a schematic diagram of the overall three-dimensional structure of a semi-circular arc groove hydraulic clamp for pipe fittings of the present invention; Figure 1 Two clamping states of the hydraulic clamp of the present application for the pipe fitting are shown. The semi-arc groove hydraulic clamp on the left is a preliminary state diagram before clamping the pipe fitting, and the semi-arc groove hydraulic clamp on the right is a clamping state diagram during the positioning process of the pipe fitting.

[0022] The semi-circular arc groove hydraulic clamp of the present application optimizes the clamp structure to make it more closely fit the pipe structure, adopts a hydraulic drive mode and a multi-component collaborative transmission mode, and ensures the stability and positioning accuracy of the pipe during the processing through the coordinated action of the directional block 120, the positioning baffle 130 and the positioning unit 300, so that the present application can achieve efficient and precise positioning and clamping of the pipe, thereby improving the processing accuracy and quality, achieving the technical effect of precise positioning during the processing, improving the quality of the pipe after processing, reducing the processing steps and improving the processing efficiency.

[0023] Example 1 See also Figures 1 to 3 , an embodiment of the present invention provides a semicircular arc groove hydraulic clamp for pipe fittings, including a base plate 100, a clamp body 110, an orientation block 120, a positioning baffle 130, a fixing plate 140, a connecting block 150, a cylinder 160, a pressing unit 200 and a positioning unit 300; The clamp body 110 is fixed on the bottom plate 100 and is used to support and fix the pipe fittings; The orientation block 120 is fixed to one side of the clamp body 110 by bolts to limit the movement of the pipe in the horizontal direction; The positioning baffle 130 is fixed to the front end of the directional block 120 by bolts to further limit the position of the pipe; The fixing plate 140 is fixed to the clamp body 110 by bolts, and is used to fix the connecting block 150 and the cylinder 160; One end of the connecting block 150 is connected to the fixing plate 140 by bolts, and the other end is connected to the piston rod of the cylinder 160; The cylinder 160 is fixed on the connecting block 150 and is used to fix the rear end of the pipe fitting; The pressing unit 200 is fixed on the bottom plate 100 and is located on the right side of the clamp body 110, and is used to fix the upper end of the pipe; The positioning unit 300 is disposed between the orientation block 120 and the pressing unit 200 and is used to position the pipe.

[0024] Further, the pressing unit 200 includes a hydraulic cylinder 210, a pressing arm 220, a connecting rod 230 and a supporting block 240; The hydraulic cylinder 210 is fixed on the bottom plate 100 and is used to drive the pressing arm 220 to rotate, thereby fixing the pipe fitting; The pressing arm 220 is rotatably connected to the telescopic rod of the hydraulic cylinder 210 through a short pin, and is used to press and fix the pipe fitting; The connecting rod 230 is provided with two, arranged front and rear, one end of which is rotatably connected to the pressure arm 220 through a long pin, and the other end of which is rotatably connected to the support block 240 through a long pin; The support block 240 is fixed to the upper end of the hydraulic cylinder 210 and is located below the pressure arm 220 , and is used to support the connecting rod 230 .

[0025] Preferably, the top of the clamp body 110 is a semicircular arc structure and its interior matches the cylindrical structure of the pipe fitting, which facilitates the placement of the pipe fitting and improves the stability and efficiency of the positioning and subsequent processing of the pipe fitting.

[0026] During actual use, this embodiment is specifically implemented as follows: first, the pipe fitting is placed on the clamp body 110, and is preliminarily positioned by the orienting block 120 and the positioning baffle 130; then, the cylinder 160 is started to push the pipe fitting against the position of the positioning baffle 130 to achieve the front and rear end positioning of the pipe fitting; finally, the hydraulic cylinder 210 is started to drive the pressing arm 220, so that the pressing arm 220 rotates downward and presses on the top of the pipe fitting to achieve all-round positioning of the pipe fitting.

[0027] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: By optimizing the fixture structure to make it more closely fit the pipe structure, and adopting a hydraulic drive method and a multi-component collaborative transmission method, the synergistic effect of the directional block 120, the positioning baffle 130 and the positioning unit 300 ensures the stability and positioning accuracy of the pipe during the processing. This allows the present application to achieve efficient and precise positioning and clamping of the pipe, thereby improving the processing accuracy and quality, achieving precise positioning during the processing, improving the quality of the pipe after processing, reducing the processing steps, and improving the processing efficiency.

[0028] Example 2 In the later milling of the semicircular arc groove in the pipe structure in Example 1, the pipe may rotate slightly or shift position due to the action of the milling cutter, causing the positioning reference to deflect, thereby affecting the milling accuracy. Therefore, this embodiment is further optimized and improved for the above situation: See also Figure 4 and Figure 5 The embodiment of the present invention provides a semicircular arc groove hydraulic clamp for pipe fittings, wherein the positioning unit 300 includes an electric telescopic rod 310 and a positioning block 320; The electric telescopic rod 310 is fixed inside the orientation block 120 and is used to drive the positioning block 1 320 to move and position the bottom of the pipe; The positioning block 1 320 is fixed to the telescopic end of the electric telescopic rod 310 and is slidably connected in the orientation block 120, and is used for linear positioning of the right-angle structure at the bottom of the pipe.

[0029] Preferably, one end of the positioning block 320 that is positioned and matched with the bottom of the pipe is a pointed structure.

[0030] This embodiment achieves precise interference positioning of the right-angle structure of the pipe fitting by cooperating with the positioning block 320, realizes the linear positioning of the pipe fitting structure, effectively solves the problem of reduced processing accuracy caused by position offset and rotation of the pipe fitting during processing of traditional clamps, improves the flexibility of the device, and prevents the pipe fitting from slight deformation due to overheating during processing, causing the pipe fitting to rotate and shift in position, thereby improving the positioning accuracy.

[0031] Example 3 Considering that in the process of clamping and positioning the pipe fitting in Example 2, the positioning block 1 320 provides unidirectional support force to the bottom of the pipe fitting, but since the pipe fitting itself is symmetrical, the clamping effect is poor, so that the pipe fitting is unevenly stressed, resulting in an unstable processing process. Therefore, this embodiment is further optimized and improved in view of the above situation: See also Figure 6 to Figure 7The embodiment of the present invention provides a semicircular arc groove hydraulic clamp for pipe fittings, wherein the positioning unit 300 further includes a positioning block 330, a connecting rod 340, a steel wire rope 350 and a winding assembly 360; The second positioning block 330 is positioned at a right angle structure position at the upper end of the pipe through a connecting rod 340; The connecting rod 340 is an elastic telescopic structure, placed vertically, with one end fixed on the positioning block 1 320 and the other end fixed on the positioning block 2 330; The steel wire rope 350 passes through the front and rear ends of the second positioning block 330 .

[0032] The winding assembly 360 includes a bracket 361, a motor 362, a reel 1 363 and a reel 2 367; The bracket 361 is fixed on the hydraulic cylinder 210; The motor 362 is placed horizontally and fixed on the vertical section of the bracket 361; The reel 1 363 is fixed on the bracket 361 and connected to the output end of the motor 362, and is used to reel in the wire rope 350; The second reel 367 is slidably connected to the inside of the clamp body 110 via an electric slider, and is used to cooperate with the first reel 363 to provide pulling force for the two ends of the second positioning block 330.

[0033] The present application sets the positioning block 2 330 at the right-angle structure at the upper end of the pipe fitting, opposite to the positioning block 1 320, and cooperates with the reel 1 363 and the reel 2 367 through the steel wire 350 to jointly perform bidirectional positioning on the pipe fitting, so as to achieve uniform force on the pipe fitting and effectively prevent the pipe fitting from deflecting or rotating. The positioning block 1 320 and the positioning block 2 330 are both designed as tip structures to better adapt to the right-angle structure of the pipe fitting. Moreover, under the action of the steel wire 350, the motor 362 and the connecting rod 340, the positioning block 1 320, the positioning block 2 330 and their force-generating positions (i.e., the positions of the reel 1 363 and the reel 2 367) form a triangular stable structure, which further ensures the stability of the clamping state of the pipe fitting.

[0034] Example 4 In Example 3, since the steel wire rope 350 exerts pressure on the pipe in a unidirectional direction to the right, the pipe may rotate during the milling process due to uneven force, affecting the milling accuracy. In order to improve the stability of the pipe after it is fixed, this embodiment is further optimized and improved according to the above situation: See also Figures 7 to 11 , the embodiment of the present invention provides a semicircular arc groove hydraulic clamp for pipe fittings, the positioning unit 300 also includes a balancing component 370 for adjusting the force balance of the pipe fitting during the processing; The balancing assembly 370 includes a moving block 371, a connecting spring 372, a pressing block 373 and a return spring 374; The moving block 371 is slidably connected to the inside of the clamp body 110 via a connecting spring 372; The pressing block 373 is slidably connected to the interior of the directional block 120 via a return spring 374, and is used to cooperate with the moving block 371 to apply pressure to the right end of the pipe.

[0035] In order to coordinate the operation of each part, preferably, one end of the moving block 371 and the clamping block 373 that cooperate with each other is provided with a guiding slope; the clamping block 373 is a square structure and is made of rubber to prevent damage caused by contact with pipe fittings.

[0036] The return spring 374 is used to provide a return force to the pressing block 373 after it moves, thereby ensuring the continuity and stability of the balance adjustment.

[0037] The present application uses the coordinated work of the winding assembly 360 and the balancing assembly 370, and the balancing assembly 370 is used to adjust the tension of the wire rope 350, ensuring that the positioning block 1 320 and the positioning block 2 330 apply balanced pressure to the pipe fitting, thereby further improving the processing quality and efficiency. When the reel 2 367 moves to the right (i.e., away from the pipe fitting), the reel 2 367 drives the moving block 371 to move forward to the right, and at the same time, under the action of the moving block 371, the pressing block 373 moves to the left (i.e., close to the pipe fitting) under the action of the guiding slope, and applies pressure to the left end of the pipe fitting to adjust the force balance of the pipe fitting.

[0038] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A semicircular arc groove hydraulic clamp for pipe fittings, comprising a base plate (100), a clamp body (110), an orientation block (120), a positioning baffle (130), a fixing plate (140), a connecting block (150), a cylinder (160), a pressing unit (200) and a positioning unit (300); The clamp body (110) is fixed on the bottom plate (100) and is used to support and fix the pipe fittings; The orientation block (120) is fixed to one side of the clamp body (110) by means of bolts, and is used to limit the movement of the pipe in the horizontal direction; The positioning baffle (130) is fixed to the front end of the orientation block (120) by means of bolts, and is used to further limit the position of the pipe fitting; The fixing plate (140) is fixed to the clamp body (110) by means of bolts, and is used to fix the connecting block (150) and the cylinder (160); One end of the connection block (150) is connected to the fixing plate (140) via a bolt, and the other end is connected to the piston rod of the cylinder (160); The cylinder (160) is fixed on the connecting block (150) and is used to fix the rear end of the pipe fitting; The pressing unit (200) is fixed on the bottom plate (100) and is located on the right side of the clamp body (110), and is used to fix the upper end of the pipe fitting; The positioning unit (300) is arranged between the orientation block (120) and the pressing unit (200) and is used to position the pipe.

2. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 1, characterized in that: The pressing unit (200) comprises a hydraulic cylinder (210), a pressing arm (220), a connecting rod (230) and a supporting block (240); The hydraulic cylinder (210) is fixed on the bottom plate (100) and is used to drive the pressing arm (220) to rotate, thereby fixing the pipe fitting; The pressing arm (220) is rotatably connected to the telescopic rod of the hydraulic cylinder (210) via a short pin and is used to press and fix the pipe fitting; Two connecting rods (230) are provided, arranged front to back, one end of which is rotatably connected to the pressure arm (220) via a long pin, and the other end of which is rotatably connected to the support block (240) via a long pin; The support block (240) is fixed to the upper end of the hydraulic cylinder (210) and is located below the pressure arm (220), and is used to support the connecting rod (230).

3. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 2, characterized in that: The top end of the clamp body (110) is a semicircular arc structure and its interior matches the cylindrical structure of the pipe fitting.

4. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 3, characterized in that: The positioning unit (300) comprises an electric telescopic rod (310) and a positioning block 1 (320); The electric telescopic rod (310) is fixed inside the orientation block (120) and is used to drive the positioning block 1 (320) to move and position the bottom of the pipe; The positioning block 1 (320) is fixed to the telescopic end of the electric telescopic rod (310) and is slidably connected in the orientation block (120) and is used to perform linear positioning on the right-angle structure at the bottom of the pipe.

5. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 4, characterized in that: One end of the positioning block 1 (320) that is positioned and matched with the bottom of the pipe is a pointed structure.

6. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 5, characterized in that: The positioning unit (300) further comprises a second positioning block (330), a connecting rod (340), a steel wire rope (350) and a winding assembly (360); The second positioning block (330) is positioned at a right-angle structural position at the upper end of the pipe through a connecting rod (340); The connecting rod (340) is an elastic telescopic structure, placed vertically, with one end fixed on the first positioning block (320) and the other end fixed on the second positioning block (330); The steel wire rope (350) passes through the front and rear ends of the second positioning block (330).

7. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 6, characterized in that: The winding assembly (360) comprises a bracket (361), a motor (362), a first winding drum (363) and a second winding drum (367); The bracket (361) is fixed on the hydraulic cylinder (210); The motor (362) is placed horizontally and fixed on the vertical section of the bracket (361); The reel 1 (363) is fixed on the bracket (361) and connected to the output end of the motor (362), and is used to reel in the steel wire rope (350); The second reel (367) is slidably connected to the inside of the clamp body (110) via an electric slider, and is used to cooperate with the first reel (363) to provide pulling force for both ends of the second positioning block (330).

8. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 7, characterized in that: The positioning unit (300) further comprises a balancing component (370) for adjusting the force balance of the pipe during processing; The balancing assembly (370) comprises a moving block (371), a connecting spring (372), a pressing block (373) and a return spring (374); The moving block (371) is slidably connected inside the clamp body (110) via a connecting spring (372); The pressing block (373) is slidably connected to the interior of the orientation block (120) via a return spring (374), and is used to cooperate with the moving block (371) to apply pressure to the right end of the pipe.

9. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 8, characterized in that: One end of the movable block (371) and the pressing block (373) that cooperate with each other is provided with a guiding inclined surface.

10. A semicircular arc groove hydraulic clamp for pipe fittings according to claim 9, characterized in that: The pressing block (373) is of a square structure and made of rubber material, and is used to prevent damage caused by contact with the pipe fitting.

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