A U-shaped tube cutting device for refrigeration fittings

Abstract

The present invention relates to the field of metal pipe cutting technology, and specifically to a U-shaped pipe cutting device for refrigeration accessories. The device comprises a main bracket, with extended support plates provided on both sides of the main bracket, a clamping plate fixing body provided on one side of the top of the main bracket, two symmetrically distributed stamping pads provided on the bottom of the clamping plate fixing body, a stamping cutter provided at the bottom of the main bracket between the two clamping plate fixing bodies, two remotely controlled electric telescopic rods provided on the two extended support plates, and a U-shaped pipe inner diameter clamp fixedly mounted between the two electric telescopic rods. The U-shaped pipe cutting device for refrigeration accessories of the present invention can achieve pipe deformation control and dynamic buffering, and adopts a modular design.

Description

Technical Field

[0001] The invention relates to the technical field of metal tube cutting, in particular to a U-shaped tube cutting device for refrigeration accessories. Background Art

[0002] U-shaped metal pipe fittings are widely used in heat exchangers, condensers and other equipment in refrigeration accessories. The cutting accuracy directly affects the sealing and assembly efficiency of the piping system. Traditional cutting processes mainly rely on manual operation or simple mechanical devices, which have the following technical pain points:

[0003] 1. Insufficient cutting efficiency and precision: Conventional fixtures only clamp the outer wall, and the risk of deformation of the pipe due to stress is high, especially for thin-walled pipes, which affects the verticality of the cutting surface;

[0004] 2. Equipment stability issues: Traditional stamping and cutting lacks a buffer structure, and tool impact can easily cause pipe displacement;

[0005] 3. Adaptability limitations: Traditional devices are difficult to adapt to U-shaped tubes with different curvature radii, and the replacement of integrated cutting tools is time-consuming. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a U-shaped tube cutting device for refrigeration accessories, which can realize tube deformation control and dynamic buffering and adopts a modular design.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is: a U-shaped tube cutting device for refrigeration accessories, which includes a main bracket, extended support plates are provided on both sides of the main bracket, a splint fixing body is provided on one side of the top of the main bracket, two symmetrically distributed stamping pads are provided at the bottom of the splint fixing body, a stamping cutter is provided at the bottom of the main bracket and is located between the two splint fixing bodies, two extended support plates are provided with remotely controlled electric telescopic rods, and a U-shaped tube inner diameter clamp is fixedly installed between the two electric telescopic rods.

[0008] As an improvement, the main bracket includes a first L-shaped frame, the bottom of the first L-shaped frame is used to install the punch cutter, a second L-shaped frame is provided on one side of the top of the first L-shaped frame for installing the splint fixing body, and U-shaped protective frames for protecting the punch cutter are fixedly connected on both sides of the first L-shaped frame, and a third L-shaped frame for protection is provided between the U-shaped protective frame and the second L-shaped frame.

[0009] As an improvement, the splint fixing body includes a fixing body body, the bottom of the fixing body body is provided with two symmetrically distributed T-shaped fixing grooves, and both sides of the bottom of the fixing body body are respectively provided with inclined supporting protrusions for supporting the stamping pad.

[0010] As an improvement, the stamping pad includes a first limiting pad, and a T-limiting block that cooperates with the T-shaped fixing groove is provided on the top of the first limiting pad. The two first limiting pads are respectively tightly attached to the adjacent inclined support protrusions, and the opposite surfaces of the two first limiting pads are provided with inclined surfaces, which are used to control the opening and closing of the stamping cutter.

[0011] As an improvement, the punching cutter includes a telescopic cylinder fixedly mounted on the bottom of the first L-shaped frame, a strip frame fixedly mounted on the telescopic end of the telescopic cylinder, and an axis frame fixedly mounted on both ends of the strip frame. Two symmetrically mounted L-shaped clamps are rotatably connected to the two axis frames, and a first spring is provided between the ends of the two L-shaped clamps. Punching and cutting tools can be detachably mounted on both of the L-shaped clamps.

[0012] As an improvement, the strip frame is provided with a second limiting pad for limiting the angle between the two L-shaped clamps.

[0013] As an improvement, the cross-sections of the two punching and cutting tools are quadrilaterals, cutting knives are provided at the nearest edges of the two punching and cutting tools, and the surfaces of the two punching and cutting tools away from the cutting knives can be in sliding contact with the inclined surface.

[0014] As an improvement, the U-shaped tube inner diameter clamp includes a rod body, a first isolation sleeve is provided in the middle of the rod body, and second isolation sleeves are fixedly installed at both ends of the rod body. A movable sleeve slidably connected to the rod body is provided between the two second isolation sleeves and the first isolation sleeves. Four evenly distributed first connecting rods are rotatably connected to the second isolation sleeve, and four evenly distributed limiting axis frames are provided on the movable sleeve. The second connecting rod is rotatably connected to the limiting axis frame, and the end of the second connecting rod away from the limiting axis frame is rotatably connected to the first connecting rod. A slide is slidably connected between the ends of the two corresponding first connecting rods away from the second isolation sleeve, and an inclined plate is provided at one end of the slide. The four inclined plates are inwardly contracted from the direction of the slide to the outside.

[0015] As an improvement, a threaded rod is provided between the second isolation sleeve and the movable sleeve, the threaded rod is threadedly connected to the movable sleeve, and the threaded rod is rotatably connected to the second isolation sleeve. A first motor for rotating the threaded rod is provided on the outer sides of the two second isolation sleeves. A number of evenly distributed limiting slide rods are provided between the second isolation sleeve and the movable sleeve, one end of the limiting slide rod is fixedly connected to the second isolation sleeve, and the other end is slidably connected to the movable sleeve. A second spring is provided between the movable sleeve and the first isolation sleeve.

[0016] As an improvement, the electric telescopic rod includes an electric telescopic rod body, and the telescopic ends of the two electric telescopic rod bodies are both provided with a fixing frame for mounting the rod body.

[0017] After adopting the above structure, the present invention has the following advantages:

[0018] 1. The U-shaped tube inner diameter clamp's connecting rod linkage mechanism and the enveloping contraction design of the inclined plate form a four-point synchronous positioning clamping, with a small clamping roundness error, effectively avoiding the tube deformation caused by traditional outer wall clamping;

[0019] 2. The coordinated adjustment mechanism of the threaded rod and the limit slide rod, combined with the preload of the second spring, enables multi-diameter self-adaptation to meet the cutting requirements of U-shaped tubes with different curvatures.

[0020] 3. The inclined surface of the stamping pad forms a sliding pair with the back of the stamping cutting tool, converting the vertical movement of the telescopic cylinder into a symmetrical opening and closing action. Combined with the 60°-120° adjustable angle design of the limit pad, it ensures that the double-edged cutting blades cross-cut and the verticality error of the cutting surface is small;

[0021] 4. The first spring in the punch cutter provides a dynamic buffer force of 20-30N. Combined with the polyurethane energy-absorbing material of the limit pad, it can absorb impact energy and prevent the pipe from being displaced due to tool impact.

[0022] 5. The plug-in structure of the T-shaped fixing groove and the T-limit block enables quick replacement of the stamping pad to meet the cutting requirements of pipe walls of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a U-shaped tube cutting device for refrigeration accessories of the present invention. Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of a U-shaped tube cutting device for refrigeration accessories of the present invention. Figure 2 .

[0025] Figure 3 It is a structural schematic diagram of a general bracket of a U-shaped tube cutting device for refrigeration accessories of the present invention.

[0026] Figure 4 It is a structural schematic diagram of a clamp fixing body of a U-shaped tube cutting device for refrigeration accessories of the present invention.

[0027] Figure 5 It is a structural schematic diagram of a punching cutter of a U-shaped tube cutting device for refrigeration accessories of the present invention.

[0028] Figure 6 It is a schematic diagram of the structural decomposition of a punch cutter of a U-shaped tube cutting device for refrigeration accessories of the present invention.

[0029] Figure 7 It is a side view of a U-shaped tube cutting device for refrigeration accessories of the present invention.

[0030] Figure 8 It is a structural schematic diagram of a U-shaped tube inner diameter clamp of a U-shaped tube cutting device for refrigeration accessories of the present invention.

[0031] Figure 9 It is a schematic diagram of the structural decomposition of a U-shaped tube inner diameter clamp of a U-shaped tube cutting device for refrigeration accessories of the present invention.

[0032] Figure 10 The invention is a U-shaped tube cutting device for refrigeration accessories Figure 9 Magnified view of part D.

[0033] As shown in the figure: 1. Main bracket; 101. First L-shaped frame; 102. Second L-shaped frame; 103. U-shaped protection frame; 104. Third L-shaped frame; 2. Clamp fixing body; 201. Fixing body; 202. T-shaped fixing groove; 203. Inclined support protrusion; 3. Stamping pad; 301. First limit pad; 302. T limit block; 303. Inclined surface; 4. Stamping cutter; 401. Telescopic cylinder; 402. Strip frame; 403. Axle frame; 404. L-shaped fixture; 405. Second limit pad; 40 6. First spring; 407. Punching and cutting tool; 408. Cutting knife; 5. Extended support plate; 6. U-shaped tube inner diameter clamp; 601. Rod body; 602. First isolation sleeve; 603. Second isolation sleeve; 604. Moving sleeve; 605. First connecting rod; 606. Second connecting rod; 607. Limiting axis frame; 608. Slide plate; 609. Inclined plate; 610. Threaded rod; 611. Limiting slide rod; 612. First motor; 613. Second spring; 7. Electric telescopic rod; 701. Electric telescopic rod body; 702. Fixed frame. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below with reference to the accompanying drawings.

[0035] Combined with attachment Figure 1 , Attachment Figure 2 and attached Figure 3 :

[0036] A U-shaped tube cutting device for refrigeration accessories includes a main bracket 1, a splint fixing body 2 is provided on one side of the top of the main bracket 1, a punch cutter 4 is provided on the bottom of the main bracket 1 and is located between the two splint fixing bodies 2, the main bracket 1 includes a first L-shaped frame 101, the bottom of the first L-shaped frame 101 is used to install the punch cutter 4, a second L-shaped frame 102 is provided on one side of the top of the first L-shaped frame 101 for installing the splint fixing body 2, U-shaped protective frames 103 for protecting the punch cutter 4 are fixedly connected on both sides of the first L-shaped frame 101, and a third L-shaped frame 104 for protection is provided between the U-shaped protective frame 103 and the second L-shaped frame 102.

[0037] Through this structure, the first L-shaped frame 101 provides a stable mounting base for the punch cutter 4, the second L-shaped frame 102 and the third L-shaped frame 104 form a double-layer support frame for the clamping plate fixing body 2; the U-shaped protective frame 103 wraps the bottom of the punch cutter 4 to effectively prevent external impact;

[0038] The split L-shaped frame design facilitates independent maintenance of each functional module. The third L-shaped frame 104 fills the gap between the U-shaped protection frame 103 and the second L-shaped frame 102 to form a complete protection system.

[0039] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 4 :

[0040] Two symmetrically distributed stamping pads 3 are provided at the bottom of the splint fixing body 2. The splint fixing body 2 includes a fixing body 201. Two symmetrically distributed T-shaped fixing grooves 202 are provided at the bottom of the fixing body 201. Both sides of the bottom of the fixing body 201 are provided with inclined support protrusions 203 for supporting the stamping pads 3.

[0041] The stamping pad 3 includes a first limiting pad 301, and a T-limiting block 302 that cooperates with the T-shaped fixing groove 202 is provided on the top of the first limiting pad 301. The two first limiting pads 301 are respectively tightly attached to the adjacent inclined support protrusions 203, and the opposite surfaces of the two first limiting pads 301 are provided with inclined surfaces 303, which are used to control the opening and closing of the stamping cutter 4.

[0042] Through the above structure, the plug-in cooperation between the T-shaped fixing groove 202 and the T limit block 302 ensures that the installation position accuracy of the stamping pad 3 is ≤0.1mm; the inclined support protrusion 203 provides lateral support force at an inclination angle of 15° to prevent the pad from being displaced due to cutting vibration. The inclined surface 303 of the stamping pad 3 forms a sliding pair with the back of the stamping cutting tool 407, converting the vertical movement of the telescopic cylinder 401 into the symmetrical opening and closing action of the tool. The opening and closing angle is precisely controlled by the second limit pad 405 within an adjustable range of 60°-120°.

[0043] Combined with attachment Figure 1 , Attachment Figure 4 , Attachment Figure 5 and attached Figure 6 :

[0044] The punching cutter 4 includes a telescopic cylinder 401 fixedly mounted on the bottom of the first L-shaped frame 101, a strip frame 402 fixedly mounted on the telescopic end of the telescopic cylinder 401, and shaft frames 403 fixedly mounted at both ends of the strip frame 402. Two symmetrically mounted L-shaped clamps 404 are rotatably connected to the two shaft frames 403, a first spring 406 is provided between the ends of the two L-shaped clamps 404, and punching cutting tools 407 are detachably mounted on both of the L-shaped clamps 404. A second limiting pad 405 is provided on the strip frame 402 for limiting the angle between the two L-shaped clamps 404. The cross-section of the two punching cutting tools 407 is quadrilateral, and a cutting knife 408 is provided at the nearest edge of the two punching cutting tools 407. The surfaces of the two punching cutting tools 407 away from the cutting knife 408 can be in sliding contact with the inclined surface 303.

[0045] Through this structure, the first spring 406 is connected to the end of the L-shaped clamp 404, providing 20-30N elastic buffering force when the tool contacts the pipe; the second limiting pad 405 is made of polyurethane material, which absorbs more than 70% of the impact energy. The stamping cutting tool 407 is detachably connected to the L-shaped clamp 404 through a slot. The quadrilateral tool design enables the cutting tool 408 to form a cross shear force, which improves the efficiency compared to traditional single-edged cutting.

[0046] Combined with attachment Figure 2 , Attachment Figure 8 , Attachment Figure 9 and attached Figure 10 :

[0047] Extension support plates 5 are provided on both sides of the main bracket 1, and two of the extension support plates 5 are provided with remote-controlled electric telescopic rods 7. A U-shaped tube inner diameter clamp 6 is fixedly installed between the two electric telescopic rods 7. The U-shaped tube inner diameter clamp 6 includes a rod body 601, a first isolation sleeve 602 is provided in the middle of the rod body 601, and a second isolation sleeve 603 is fixedly installed at both ends of the rod body 601. A movable sleeve 604 is provided between the two second isolation sleeves 603 and the first isolation sleeve 602, and is slidably connected to the rod body 601. There are four evenly distributed first connecting rods 605 in a rotatable connection, four evenly distributed limiting axis frames 607 are provided on the movable sleeve 604, and the limiting axis frame 607 is rotatably connected to the second connecting rod 606. The end of the second connecting rod 606 away from the limiting axis frame 607 is rotatably connected to the first connecting rod 605, and a slide 608 is slidably connected between the two corresponding ends of the first connecting rods 605 away from the second isolation sleeve 603. An inclined plate 609 is provided at one end of the slide 608, and the four inclined plates 609 are inwardly contracted from the direction of the slide 608 to the outside.

[0048] Through this structure, the first motor 612 drives the threaded rod 610 to rotate, driving the movable sleeve 604 to move axially by ±15mm along the limiting slide rod 611. The second spring 613 provides a preload of 10-15N, causing the four groups of inclined plates 609 to shrink synchronously to adapt to pipe diameters of Φ6-25mm. The first connecting rod 605 and the second connecting rod 606 form a planar four-bar mechanism. The sliding pair design of the slide plate 608 enables the inclined plate 609 to form a spatial envelope clamping, and the roundness error of the pipe is controlled within ±0.05mm.

[0049] Combined with attachment Figure 2 , Attachment Figure 7 , Attachment Figure 8 , Attachment Figure 9 and attached Figure 10 :

[0050] A threaded rod 610 is provided between the second isolation sleeve 603 and the movable sleeve 604, and the threaded rod 610 is threadedly connected to the movable sleeve 604. The threaded rod 610 is rotatably connected to the second isolation sleeve 603. A first motor 612 for rotating the threaded rod 610 is provided on the outside of the two second isolation sleeves 603. A number of evenly distributed limiting slides 611 are provided between the second isolation sleeve 603 and the movable sleeve 604. One end of the limiting slide 611 is fixedly connected to the second isolation sleeve 603, and the other end is slidably connected to the movable sleeve 604. A second spring 613 is provided between the movable sleeve 604 and the first isolation sleeve 602. The electric telescopic rod 7 includes an electric telescopic rod body 701, and the telescopic ends of the two electric telescopic rod bodies 701 are provided with a fixing frame 702 for mounting the rod body 601.

[0051] Through this structure, see Appendix Figure 7 The U-shaped tube to be processed is placed at C, and the U-shaped tube at C is moved to A by the robotic arm. When cutting, the electric telescopic rod 7 first completes the positioning of the tube with the inner diameter clamp 6 of the U-shaped tube, and then the punch cutter 4 moves downward to cut. The dual systems realize action interlocking through the pressure sensor. The cut U-shaped tube is then moved to B by the robotic arm to ensure zero interference in the cutting process.

[0052] Example 1:

[0053] First, adjust the U-shaped tube inner diameter clamp 6. Start the first motor 612, drive the threaded rod 610, and drive the movable sleeve 604 to move axially along the limit slide 611 within an adjustment range of ±15mm. The second spring 613 is compressed to a pre-tightened state, causing the four sets of inclined plates 609 to contract synchronously to form an inner diameter clamping cavity suitable for tubes with diameters of 6-25mm. The clamping force is fed back by the pressure sensor, and the output torque of the first motor 612 is controlled to ensure that the roundness error of the tube is ≤±0.05mm.

[0054] During punching and cutting, the telescopic cylinder 401 is started to push the strip frame 402 upward, and the inclined surface on the back of the punching and cutting tool 407 contacts the inclined surface 303. The opening and closing angle of the tool changes with the upward depth, and the cutting tool 408 forms a cross shear force. During the cutting process, the second limit pad 405 absorbs 70% of the impact energy, and the first spring 406 provides dynamic buffering.

[0055] Example 2:

[0056] See attached Figure 7 , place the R80mm φ12×1mm copper U-shaped tube in the positioning tooling area C, the robotic arm grabs the tube and transfers it to the processing position A, the U-shaped tube inner diameter clamp 6 shrinks to φ12.1mm to complete the inner diameter positioning, the punch cutter 4 moves upward at a speed of 35mm / s, and the cutting pressure is set to 450N. After the cutting is completed, the robotic arm transfers the workpiece to the finished product area B. The whole process takes ≤15 seconds.

[0057] The above description of the present invention and its embodiments is non-limiting, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above description and, without departing from the purpose of the present invention, designs a structure and embodiment similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A U-shaped tube cutting device for refrigeration accessories, comprising a main bracket (1), with extended support plates (5) provided on both sides of the main bracket (1), characterized in that: A clamping plate fixing body (2) is provided on one side of the top of the main bracket (1), two symmetrically distributed punching pads (3) are provided on the bottom of the clamping plate fixing body (2), a punching cutter (4) is provided on the bottom of the main bracket (1) and is located between the two clamping plate fixing bodies (2), and a remotely controlled electric telescopic rod (7) is provided on the two extended support plates (5), and a U-shaped tube inner diameter clamp (6) is fixedly installed between the two electric telescopic rods (7); The splint fixing body (2) comprises a fixing body (201), the bottom of the fixing body (201) is provided with two symmetrically distributed T-shaped fixing grooves (202), and both sides of the bottom of the fixing body (201) are respectively provided with inclined supporting protrusions (203) for supporting the punching pad (3); The punching pad (3) includes a first limiting pad (301), a T-limiting block (302) matched with the T-shaped fixing groove (202) is provided on the top of the first limiting pad (301), two of the first limiting pads (301) are respectively in close contact with the adjacent inclined support protrusions (203), and the opposite surfaces of the two first limiting pads (301) are provided with inclined surfaces (303), and the inclined surfaces (303) are used to control the opening and closing of the punching cutter (4); The punching cutter (4) comprises a telescopic cylinder (401) fixedly mounted on the bottom of the first L-shaped frame (101), a strip frame (402) fixedly mounted on the telescopic end of the telescopic cylinder (401), shaft frames (403) fixedly mounted on both ends of the strip frame (402), two symmetrically mounted L-shaped clamps (404) rotatably connected to the two shaft frames (403), a first spring (406) being provided between the ends of the two L-shaped clamps (404), and punching cutting tools (407) being detachably mounted on both L-shaped clamps (404); The two punching and cutting tools (407) have quadrilateral cross-sections, and cutting tools (408) are provided at the nearest edges of the two punching and cutting tools (407). The surfaces of the two punching and cutting tools (407) away from the cutting tools (408) can be in sliding contact with the inclined surface (303).

2. The U-shaped tube cutting device for refrigeration accessories according to claim 1, characterized in that: The main bracket (1) comprises a first L-shaped frame (101), the bottom of the first L-shaped frame (101) is used to install the punch cutter (4), a second L-shaped frame (102) for installing the splint fixing body (2) is provided on one side of the top of the first L-shaped frame (101), U-shaped protection frames (103) for protecting the punch cutter (4) are fixedly connected to both sides of the first L-shaped frame (101), and a third L-shaped frame (104) for protection is provided between the U-shaped protection frame (103) and the second L-shaped frame (102).

3. The U-shaped tube cutting device for refrigeration accessories according to claim 1, characterized in that: A second limiting pad (405) for limiting the angle between the two L-shaped clamps (404) is provided on the strip frame (402).

4. The U-shaped tube cutting device for refrigeration accessories according to claim 1, characterized in that: The U-shaped tube inner diameter clamp (6) comprises a rod body (601), a first isolation sleeve (602) is provided in the middle of the rod body (601), second isolation sleeves (603) are fixedly installed at both ends of the rod body (601), and a movable sleeve (604) slidably connected to the rod body (601) is provided between the two second isolation sleeves (603) and the first isolation sleeve (602), four evenly distributed first connecting rods (605) are rotatably connected to the second isolation sleeve (603), and four evenly distributed first connecting rods (605) are provided on the movable sleeve (604). A limiting shaft frame (607) of the cloth, a second connecting rod (606) is rotatably connected to the limiting shaft frame (607), one end of the second connecting rod (606) away from the limiting shaft frame (607) is rotatably connected to the first connecting rod (605), and a slide plate (608) is slidably connected between two corresponding ends of the first connecting rods (605) away from the second isolation sleeve (603), and an inclined plate (609) is provided at one end of the slide plate (608), and the four inclined plates (609) are inwardly contracted from the direction of the slide plate (608) to the outside.

5. The U-shaped tube cutting device for refrigeration accessories according to claim 4, characterized in that: A threaded rod (610) is provided between the second isolation sleeve (603) and the movable sleeve (604), the threaded rod (610) and the movable sleeve (604) are threadedly connected, the threaded rod (610) and the second isolation sleeve (603) are rotatably connected, a first motor (612) for rotating the threaded rod (610) is provided on the outside of the two second isolation sleeves (603), a plurality of evenly distributed limiting slide rods (611) are provided between the second isolation sleeve (603) and the movable sleeve (604), one end of the limiting slide rod (611) is fixedly connected to the second isolation sleeve (603), and the other end is slidably connected to the movable sleeve (604), and a second spring (613) is provided between the movable sleeve (604) and the first isolation sleeve (602).

6. The U-shaped tube cutting device for refrigeration accessories according to claim 4, characterized in that: The electric telescopic rod (7) comprises an electric telescopic rod body (701), and the telescopic ends of the two electric telescopic rod bodies (701) are both provided with a fixing frame (702) for mounting the rod body (601).

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