High adaptability clamp for pipe cutting machine

Abstract

The utility model discloses a kind of high adaptability clamps for pipe cutting machine, it is related to clamp technical field, it includes clamp body, chuck inner ring is equipped in body inside, chuck inner ring coaxially is equipped with outer gear ring;Chuck inner ring side is equipped with four-point clamping mechanism, this mechanism contains opposite upper and lower clamping arms and opposite left and right clamping arms, distance adjusting mechanism is equipped on clamp body to adjust clamping arm spacing;The present clamp is realized multidirectional stable clamping by four-point clamping mechanism, and flexible adaptation round pipe, square tube and rectangular tube are matched with distance adjusting mechanism, without frequently replacing clamp, improve processing efficiency;Four-point clamping structure enhances clamping stability, reduces pipe material deviation when cutting, guarantees incision accuracy, and is suitable for batch processing scene of multi-specification pipe.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, specifically to a highly adaptable clamp for a pipe cutting machine. Background Technology

[0002] In the field of pipe cutting machine processing, the adaptability and clamping stability of the fixtures directly affect the cutting accuracy and processing efficiency of the pipes. Existing pipe cutting machine fixtures mostly adopt two-point or three-point clamping structures, which can only adapt to pipes of a single cross-section type, such as arc-shaped clamping fixtures specifically for round pipes or flat clamping fixtures specifically for square pipes. When processing round, square, or rectangular pipes with different cross-sections, frequent fixture changes are required, which not only increases downtime and reduces production efficiency but also easily affects processing accuracy due to fixture change errors. At the same time, traditional fixtures have few clamping points, resulting in poor clamping stability for non-standard cross-section pipes. During cutting, pipe misalignment is prone to occur, leading to problems such as skewed cuts and dimensional deviations, making it difficult to meet the batch processing needs of multi-specification pipes. Utility Model Content

[0003] The purpose of this utility model is to provide a highly adaptable clamp for pipe cutting machines. This clamp achieves stable clamping in multiple directions through a four-point clamping mechanism, and can be flexibly adapted to round, square, and rectangular pipes with the help of an adjustable distance mechanism, eliminating the need for frequent clamp changes and improving processing efficiency. The four-point clamping structure enhances clamping stability, reduces pipe offset during cutting, and ensures cutting accuracy, making it suitable for batch processing of pipes of various specifications.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a highly adaptable clamp for a pipe cutting machine, comprising a clamp body, an inner chuck ring disposed inside the clamp body, an outer gear ring coaxially disposed on the inner chuck ring, a four-point clamping mechanism disposed on one side of the inner chuck ring, the four-point clamping mechanism comprising an upper clamping arm and a lower clamping arm disposed opposite to each other, and a left clamping arm and a right clamping arm disposed opposite to each other, and an adjustment mechanism disposed on the clamp body for adjusting the distance between the upper clamping arm and the lower clamping arm, and the distance between the left clamping arm and the right clamping arm.

[0005] To further optimize this utility model, the following technical solutions may be preferred: Preferably, a protective cover is provided on the clamp body corresponding to the four-point clamping mechanism, and an adjustment operation hole is provided on the protective cover corresponding to the adjustment mechanism.

[0006] Preferably, the left clamping arm, the right clamping arm, the upper clamping arm, and the lower clamping arm are all centered along the inner diameter of the chuck.

[0007] Preferably, the adjusting mechanism includes a first adjusting screw that is rotatably arranged. Two first adjusting screws are arranged in parallel and pass through the upper clamping arm and the lower clamping arm. The rotation of the first adjusting screw causes the upper clamping arm and the lower clamping arm to slide.

[0008] Preferably, the adjusting mechanism further includes a second adjusting screw that is rotatably arranged. There are two second adjusting screws arranged in parallel, and the two second adjusting screws pass through the left clamping arm and the right clamping arm. The rotation of the second adjusting screws causes the left clamping arm and the right clamping arm to slide.

[0009] Preferably, the ends of the first adjusting screw and the second adjusting screw are provided with adjusting heads, and the first adjusting screw and the second adjusting screw are each provided with threaded areas with opposite directions of rotation, and each threaded area is provided with a slide.

[0010] Preferably, a support seat is provided on the clamp body corresponding to the end positions of the first adjusting screw and the second adjusting screw.

[0011] Preferably, the upper clamping arm, lower clamping arm, left clamping arm, and right clamping arm are all U-shaped, and each of the upper clamping arm, lower clamping arm, left clamping arm, and right clamping arm includes a clamping part and a connecting ear, wherein the connecting ear is connected to a slide.

[0012] The beneficial effects of this utility model are as follows: (1) The four-point clamping mechanism, combined with the distance adjustment mechanism, breaks through the limitation of the traditional single-adaptation of the clamp. By adjusting the distance between the upper and lower, left and right clamping arms, it can stably clamp round tubes, square tubes and rectangular tubes without frequent clamp replacement, greatly shortening downtime and improving production efficiency.

[0013] (2) The clamping arms are centered along the inner diameter of the chuck and are arranged in a U-shaped clamping part to ensure that the pipe is subjected to uniform force. The screw structure with two points of synchronous adjustment avoids clamping deviation, ensures the coaxiality of the pipe and the inner circle of the chuck, and improves the cutting accuracy.

[0014] (3) The design of the threaded area with opposite rotation direction makes the clamping arm slide synchronously in opposite directions, which is convenient to adjust and has good centering, reducing manual operation error; the support seat enhances the stability of the screw and extends the service life of the mechanism.

[0015] (4) The protective cover can protect the internal mechanism from chip contamination. The adjustment operation hole is designed to be directly opposite the adjustment head of the adjustment screw, which takes into account both protection and convenient adjustment, improves the safety of use, and is suitable for batch processing of multi-specification pipes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the fixture; Figure 2This is a schematic diagram of the outer structure of the clamp; Figure 3 This is a schematic diagram of a four-point clamping mechanism.

[0017] The components are: 1-clamp body, 2-chuck inner ring, 3-outer gear ring, 4-upper clamping arm, 5-lower clamping arm, 6-left clamping arm, 7-right clamping arm, 8-clamping part, 9-connecting ear, 10-first adjusting screw, 11-second adjusting screw, 12-slide seat, 13-deep groove ball bearing, 14-support seat, 17-adjusting head, 18-protective cover, 19-adjusting operation hole. Detailed Implementation

[0018] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] 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.

[0020] Example 1: like Figures 1 to 3 As shown, this utility model discloses a highly adaptable clamp for a pipe cutting machine, including a clamp body 1. The clamp body 1 serves as the mounting base and load-bearing frame of the entire clamp, and is integrally cast from HT200 gray cast iron. It has a pre-reserved mounting chamber, high structural strength, and excellent shock absorption performance, effectively withstanding the vibration load generated during the cutting process. A chuck inner ring 2 is bolted to the inner side of the clamp body 1. The chuck inner ring 2 is made of 40Cr alloy structural steel after quenching and tempering. Its inner diameter is designed according to the maximum outer diameter of the pipes commonly processed by the pipe cutting machine. The surface of the inner ring is ground to a surface roughness of Ra0.8μm to reduce frictional damage during pipe clamping.

[0021] An external gear ring 3 is coaxially mounted on the inner ring 2 of the chuck. The external gear ring 3 is made of 20CrMnTi carburized and quenched material with a carburized layer depth of 0.8-1.2mm and a surface hardness of HRC58-62, ensuring its wear resistance and transmission stability.

[0022] A four-point clamping mechanism is provided on the side of the chuck inner ring 2 near the pipe feed end. This four-point clamping mechanism is the core component for achieving stable clamping of pipes of various specifications. Specifically, it includes an upper clamping arm 4 and a lower clamping arm 5 arranged opposite each other, and a left clamping arm 6 and a right clamping arm 7 arranged opposite each other. To ensure that the pipe is subjected to uniform force and remains coaxial with the chuck inner ring 2 during clamping, the left clamping arm 6 and the right clamping arm 7, and the upper clamping arm 4 and the lower clamping arm 5 are all centered along the diameter direction of the chuck inner ring 2. That is, the clamping center of the four clamping arms coincides with the center of the chuck inner ring 2, effectively avoiding cutting accuracy deviation caused by clamping offset.

[0023] Specifically, the upper clamping arm 4, lower clamping arm 5, left clamping arm 6, and right clamping arm 7 are all forged and milled from 6061 aluminum alloy, forming a U-shaped structure that ensures clamping strength while reducing the weight of the mechanism. Each clamping arm includes an integrally formed clamping part 8 and a connecting ear 9. The inner wall of the clamping part 8 has an arc-shaped concave structure with an arc radius suitable for the outer diameter range of commonly used pipes (φ10-φ200mm). A 3mm thick polyurethane anti-slip pad is attached to the concave surface, and the surface of the anti-slip pad is decorated with diamond-shaped anti-slip patterns, which can enhance the friction with the pipe to prevent slippage and avoid direct metal-to-metal contact that could scratch the pipe surface. The connecting ear 9 has two φ12mm connecting holes for connecting to the slide of the adjusting mechanism.

[0024] An adjustment mechanism is provided on the clamp body 1 at the positions corresponding to the four-point clamping mechanism. This adjustment mechanism is used to independently adjust the distance between the upper clamping arm 4 and the lower clamping arm 5, and the distance between the left clamping arm 6 and the right clamping arm 7, to adapt to pipes with different cross-sectional dimensions. The adjustment mechanism specifically includes a first adjusting screw 10 and a second adjusting screw 11. The two have the same structure but are arranged perpendicularly, corresponding to the adjustment of the upper and lower clamping arms and the left and right clamping arms, respectively.

[0025] For adjusting the upper clamping arm 4 and the lower clamping arm 5, two first adjusting screws 10 are arranged in parallel. The two first adjusting screws 10 are symmetrically distributed radially along the inner ring 2 of the chuck, and their axes are perpendicular to the length direction of the upper clamping arm 4. The first adjusting screws 10 are made of 45 steel, heat-treated and precision ground, with an outer diameter of φ20mm and a pitch of 4mm. Each first adjusting screw 10 has two threaded sections with opposite directions of rotation (left-hand threaded section and right-hand threaded section). The two threaded sections are of equal length and are symmetrically distributed with the center of the inner ring 2 of the chuck as the center. Each threaded section is fitted with a slide 12 through threaded engagement. The slide 12 is made of Q235 steel and has a threaded hole at its top that matches the connecting hole of the connecting ear 9. The slide 12 is fixedly connected to the connecting ear 9 of the clamping arm by M12 socket head cap screws, realizing the linkage between the screw and the clamping arm.

[0026] Both ends of the first adjusting screw 10 are rotatably mounted on the support seat 14 via deep groove ball bearings 13. The support seat 14 is fixed to the inner wall of the mounting cavity of the fixture body 1 by bolts. The support seat 14 is made of cast steel and has bearing mounting holes and dust covers inside, which can ensure the rotational stability of the first adjusting screw 10 and prevent chips generated during cutting from entering the bearing and affecting its service life. Both ends of the two first adjusting screws 10 are provided with adjusting heads 17. The adjusting heads 17 are hexagonal prism structures, which are compatible with commonly used wrench tools. By rotating the adjusting heads 17, the two first adjusting screws 10 can be driven to rotate synchronously. Since the two threaded sections on the first adjusting screw 10 have opposite directions of rotation, when the screw rotates, the upper and lower slides 12 will drive the upper clamping arm 4 and the lower clamping arm 5 to slide synchronously in opposite directions, thereby reducing or increasing the distance between them, and maintaining centering throughout the adjustment process.

[0027] The structure, installation method, and adjustment principle of the second adjusting screw 11 are exactly the same as those of the first adjusting screw 10. Two of them are also arranged in parallel, distributed horizontally, and pass through the connecting lugs 9 of the left clamping arm 6 and the right clamping arm 7. The two second adjusting screws 11 rotate synchronously through a synchronous transmission shaft and adjusting heads, driving the left clamping arm 6 and the right clamping arm 7 to slide synchronously in opposite directions, thus completing the left-right spacing adjustment. It should be noted that the adjusting heads 17 of the first adjusting screw 10 and the second adjusting screw 11 are respectively located on the upper and lower sides and the left and right sides of the clamp body 1 to avoid mutual interference during adjustment operations.

[0028] To protect the four-point clamping mechanism and the spacing adjustment mechanism from contamination by chips and coolant generated during the cutting process, a protective cover 18 is fixedly installed on the fixture body 1 at the position corresponding to the four-point clamping mechanism. The protective cover 18 is made of thin stainless steel sheet bent into shape and is detachably connected to the fixture body 1 by bolts, facilitating later maintenance and repair. An adjustment operation hole 19 is provided on the protective cover 18 at the position corresponding to the adjustment head 17. The diameter of the adjustment operation hole 19 is slightly larger than the outer diameter of the adjustment head 17, and a rubber dust cover is provided at the opening. When it is necessary to adjust the clamping arm spacing, a wrench can be inserted into the adjustment operation hole 19 to directly operate the adjustment head 17 without disassembling the protective cover 18, thus balancing protective performance and ease of operation.

[0029] The specific working process of this utility model is as follows: When processing a round tube, the operator first rotates the first adjusting screw 10 and the second adjusting screw 11 through the adjusting heads 17 on the upper and left sides, respectively, according to the outer diameter of the round tube. When the first adjusting screw 10 rotates, its upper and lower reverse threads drive the corresponding slide block 12 to slide inward synchronously, thereby driving the upper clamping arm 4 and the lower clamping arm 5 to move closer to the center synchronously; at the same time, the second adjusting screw 11 drives the left clamping arm 6 and the right clamping arm 7 to move closer to the center synchronously, until the arc-shaped clamping part 8 of the four clamping arms is tightly attached to the outer surface of the round tube, the polyurethane anti-slip pad generates elastic deformation, increases the friction force to achieve stable clamping, and at this time the axis of the round tube coincides with the axis of the inner ring 2 of the chuck. After clamping is completed, the pipe cutting machine is started, the outer gear ring 3 drives the inner ring 2 of the chuck and the tube to rotate synchronously, and the cutting mechanism completes the cutting operation.

[0030] When switching between processing square or rectangular tubes, there is no need to disassemble or replace the fixtures. Simply rotate the corresponding adjusting head 17 in the reverse direction to slide the four clamping arms outwards to release the tube. Then, according to the cross-sectional dimensions of the square or rectangular tube, readjust the rotation angles of the first adjusting screw 10 and the second adjusting screw 11 so that the clamping parts 8 of the four clamping arms are respectively in contact with the four outer wall surfaces of the square or rectangular tube. Since the clamping arms are centered along the diameter, it ensures that the center of the tube is aligned with the center of the inner ring 2 of the chuck, achieving stable clamping. The entire adjustment process is quick and does not require stopping the machine to change fixtures, effectively improving production efficiency.

[0031] During the cutting process, the protective cover 18 can block most of the chips and coolant from entering the internal mechanism of the fixture, thus preventing chip accumulation from affecting the accuracy of the lead screw transmission. If fine adjustment of the clamping force is required during the processing, the operator can directly operate the adjustment head 17 through the adjustment operation hole 19 without removing the protective cover 18, making the operation safe and convenient.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A highly adaptable clamp for a pipe cutting machine, comprising a clamp body, wherein an inner chuck ring is disposed inside the clamp body, and an outer gear ring is coaxially disposed on the inner chuck ring, characterized in that: A four-point clamping mechanism is provided on one side of the inner ring of the chuck. The four-point clamping mechanism includes an upper clamping arm and a lower clamping arm arranged opposite each other, and a left clamping arm and a right clamping arm arranged opposite each other. The clamp body is provided with a distance adjustment mechanism for adjusting the distance between the upper clamping arm and the lower clamping arm, and the distance between the left clamping arm and the right clamping arm.

2. The highly adaptable clamp for a pipe cutting machine according to claim 1, characterized in that: The clamp body is provided with a protective cover at the position of the four-point clamping mechanism, and the protective cover is provided with an adjustment operation hole at the position of the adjustment mechanism.

3. The highly adaptable clamp for a pipe cutting machine according to claim 1, characterized in that: The left and right clamping arms, as well as the upper and lower clamping arms, are all aligned along the inner diameter of the chuck.

4. The highly adaptable clamp for a pipe cutting machine according to claim 1, characterized in that: The adjusting mechanism includes a first adjusting screw that is rotatably set. There are two first adjusting screws arranged in parallel. The two first adjusting screws pass through the upper clamping arm and the lower clamping arm. The rotation of the first adjusting screw causes the upper clamping arm and the lower clamping arm to slide.

5. A highly adaptable clamp for a pipe cutting machine according to claim 4, characterized in that: The adjusting mechanism also includes a second adjusting screw that is rotatably arranged. There are two second adjusting screws arranged in parallel, and the two second adjusting screws pass through the left clamping arm and the right clamping arm. The rotation of the second adjusting screws causes the left clamping arm and the right clamping arm to slide.

6. A highly adaptable clamp for a pipe cutting machine according to claim 5, characterized in that: The ends of the first adjusting screw and the second adjusting screw are provided with adjusting heads. Both the first adjusting screw and the second adjusting screw are provided with threaded areas with opposite directions of rotation, and each threaded area is provided with a slide.

7. A highly adaptable clamp for a pipe cutting machine according to claim 1, characterized in that: The fixture body is provided with support seats corresponding to the ends of the first adjusting screw and the second adjusting screw.

8. A highly adaptable clamp for a pipe cutting machine according to claim 6, characterized in that: The upper clamping arm, lower clamping arm, left clamping arm, and right clamping arm are all U-shaped. Each of the upper clamping arm, lower clamping arm, left clamping arm, and right clamping arm includes a clamping part and a connecting ear, and the connecting ear is connected to the slide.

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