Pipe clamping mechanism for band saw cutting apparatus
By using a multi-end coordinated clamping mechanism, three-dimensional fixation is achieved through a cylinder-driven arc clamping part, which solves the problem of pipe shaking and displacement caused by single-end clamping, improves cutting stability and reliability, and adapts to different pipe needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ERA PIPELINE (CHONGQING) CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-14
AI Technical Summary
In existing band saw cutting devices, the single-end clamping method causes the pipe to shake or shift during the cutting process, affecting the cut quality and posing safety hazards, and the clamping stability is poor.
A multi-end coordinated clamping mechanism is adopted, including a first clamping mechanism and a second clamping mechanism. The arc clamping part driven by the cylinder simultaneously fixes the pipe from the left and right and front and back directions, forming a three-dimensional clamping system. The clamping range is adjusted in conjunction with the sliding mechanism.
It improves the stability and reliability of pipe fittings during the cutting process, reduces shaking and deviation, ensures cutting accuracy, adapts to different pipe fitting sizes and materials, reduces manual operation intensity, and improves production efficiency.
Smart Images
Figure CN224489308U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe cutting technology, specifically to a pipe clamping mechanism for a band saw cutting device. Background Technology
[0002] In industrial production, the cutting and processing of pipes such as plastic pipes and metal pipes is a common process. Band saw cutting devices are widely used because of their high cutting efficiency and stable cut quality.
[0003] However, in existing technologies, band saw cutting devices generally use a single-end clamping method to clamp pipe fittings, that is, the clamping mechanism is only set at one end of the pipe fitting. This method has significant technical drawbacks:
[0004] When clamped at one end, the other end of the pipe is suspended in the air. The vibration and lateral force generated during the band saw cutting process will cause the pipe to shake or shift, which will not only affect the perpendicularity and surface flatness of the cut, but may also cause the band saw blade to break due to the pipe shift, posing a safety hazard and resulting in poor clamping stability of the pipe.
[0005] Therefore, there is an urgent need for a pipe clamping mechanism for band saw cutting devices that can achieve multi-end coordinated clamping, solve the problem of poor stability caused by single-end clamping in the existing technology, and thus improve the stability and reliability of pipe clamping. Utility Model Content
[0006] The technical problem solved by this utility model is to provide a pipe clamping mechanism for a band saw cutting device, which can realize multi-end coordinated clamping, solve the problem of poor stability caused by single-end clamping in the prior art, and thus improve the stability and reliability of pipe clamping.
[0007] The basic solution provided by this utility model is: a pipe clamping mechanism for a band saw cutting device, comprising a first clamping mechanism and a second clamping mechanism arranged sequentially from left to right on the cutting table;
[0008] The first clamping mechanism includes a mounting frame with openings at both the left and right ends. The mounting frame is provided with a first clamping member and a second clamping member from left to right. The upper end of the mounting frame is provided with a first mounting hole for the first cylinder to extend into. The piston rod of the first cylinder extends into the mounting frame through the first mounting hole.
[0009] The second clamping component includes a second upper arc clamping part and a second lower arc clamping part; the second lower arc clamping part is fixed to the inner bottom surface of the mounting frame, and the second upper arc clamping part is fixedly connected to the piston rod of the first cylinder.
[0010] The first clamping member includes a first upper arc clamping part and a first lower arc clamping part. The first upper arc clamping part is detachably connected to the second upper arc clamping part, and the first lower arc clamping part is detachably connected to the second lower arc clamping part.
[0011] The second clamping mechanism includes a support frame and a fixed frame. The support frame is fixed on the fixed frame. The support frame has a second mounting hole for the piston rod of the second cylinder to extend into. The piston rod of the second cylinder extends downward through the second mounting hole and is fixedly connected to the third upper arc clamping part. The fixed frame has a third lower arc clamping part located directly below the third upper arc clamping part.
[0012] The principle and advantages of this utility model are as follows: the pipe clamping mechanism achieves stable fixing of the pipe through the design of "double clamping unit + cylinder drive";
[0013] The principle of the first clamping mechanism is as follows: a first cylinder is installed in the first mounting hole at the upper end of the mounting frame, and the piston rod extends downward into the mounting frame. The second lower arc clamping part is fixed to the bottom of the mounting frame as a fixed support; the second upper arc clamping part is connected to the piston rod of the first cylinder and can move up and down. The first clamping component (the first upper and lower arc clamping parts) and the second clamping component are detachably connected (e.g., fixed with bolts) to form a combined clamping structure. The first cylinder drives the second upper arc clamping part to move downward, cooperating with the second lower arc clamping part, and simultaneously driving the first clamping component to clamp the left side of the pipe, achieving initial fixation.
[0014] The second clamping mechanism works by fixing a support frame to a fixed frame, installing a second cylinder in the second mounting hole of the support frame, with the piston rod extending downwards. The third lower arc-shaped clamping part is fixed to the fixed frame, located directly below the third upper arc-shaped clamping part. The second cylinder drives the third upper arc-shaped clamping part to move downwards, cooperating with the third lower arc-shaped clamping part to clamp the pipe fitting from the right side, forming a "bidirectional clamping" with the first clamping mechanism, ensuring no displacement of the pipe fitting during cutting.
[0015] Place the pipe fitting between the first and second clamping mechanisms, aligning it with the cutting position. Activate the first cylinder, driving the second upper arc-shaped clamping part downwards, clamping the left side of the pipe fitting through the first and second clamping parts. Activate the second cylinder, driving the third upper arc-shaped clamping part downwards, clamping the right side of the pipe fitting through the third upper and lower arc-shaped clamping parts. The band saw cutting device starts, cutting the pipe fitting, while the clamping mechanisms remain fixed. After cutting, the cylinder piston rod retracts, releasing the clamping parts and removing the pipe fitting.
[0016] Compared to existing single-end clamping, this solution employs a "double-clamping mechanism" to simultaneously secure the pipe fitting from both sides, avoiding the wobbling or displacement caused by single-end clamping. This is particularly suitable for cutting long or large-diameter pipe fittings. The arc-shaped clamping part has a high degree of fit with the curved surface of the pipe fitting, resulting in a large contact area, which reduces local stress concentration and prevents pipe fitting deformation. This significantly improves the stability of the clamping mechanism in securing the pipe fitting. It achieves multi-end coordinated clamping, solving the problem of poor stability caused by single-end clamping in existing technologies, thereby improving the stability and reliability of pipe fitting clamping.
[0017] The first clamping part and the second clamping part are detachably connected. Different specifications of arc clamping parts can be replaced according to the diameter and shape of the pipe fitting, and it is compatible with pipe fittings of various sizes.
[0018] The dual cylinders are independently driven, and the cylinder pressure can be adjusted to adapt to pipes of different materials and sizes, avoiding insufficient or excessive clamping force. The cylinders are automatically driven, and the clamping process is controlled with one button, reducing manual operation intensity and improving production efficiency.
[0019] Furthermore, a third clamping mechanism is provided between the first clamping mechanism and the second clamping mechanism. The third clamping mechanism includes a third front arc clamping part, a third rear arc clamping part, and a third cylinder. The third front arc clamping part and the third rear arc clamping part are arranged one in front of the other on the cutting table.
[0020] The third rear arc clamping part is fixed on the cutting table, the third front arc clamping part is slidably engaged with the cutting table, the right end face of the third front arc clamping part is fixedly connected to the piston rod of the third cylinder, and the third cylinder is fixed on the cutting table.
[0021] Beneficial effects: The third clamping mechanism, as a supplementary clamping unit in the "front-to-back direction," forms a "three-dimensional fixing system" with the original left-to-right bidirectional clamping. The third rear arc clamping part is fixed to the cutting table, serving as a rear-end support. The third front arc clamping part is slidably connected to the cutting table (e.g., with a guide rail), allowing it to move back and forth. Its right end face is fixed to the piston rod of the third cylinder. After the third cylinder is activated, the piston rod pushes the third front arc clamping part forward, engaging with the fixed third rear arc clamping part to clamp the pipe fitting from the front-to-back direction.
[0022] The original first and second clamping mechanisms provide vertical fixation, while the newly added third clamping mechanism provides front-to-back clamping, forming a three-dimensional clamping system of "vertical + front-to-back" to completely eliminate the risk of displacement, rotation, and swaying of the pipe fittings during the cutting process.
[0023] Furthermore, the first clamping mechanism also includes a sliding mechanism, which includes a slide rail, a slider, a fixing block, and a fourth cylinder fixed on the cutting table;
[0024] The slider slides in conjunction with the slide rail, the slider is fixedly connected to the lower end face of the mounting frame, the fixing block is fixedly connected to the front side wall of the mounting frame, the fourth cylinder is fixed on the front side wall of the cutting table, and the piston rod of the fourth cylinder is fixedly connected to the fixing block.
[0025] Beneficial effects: The sliding mechanism achieves the left and right displacement of the first clamping mechanism through "cylinder drive + slide rail guidance," working in conjunction with the third clamping mechanism. When the piston rod of the fourth cylinder extends or retracts, it pushes the fixed block, causing the mounting frame (and the first clamping mechanism) to slide left and right along the slide rail. The cooperation between the slider and the slide rail ensures the linear accuracy of the mounting frame during movement, preventing wobbling. By sliding the first clamping mechanism, its distance from the second and third clamping mechanisms can be adjusted to accommodate the clamping requirements of pipe fittings of different lengths.
[0026] Furthermore, the third clamping mechanism also includes a fourth front arc clamping part disposed on the left side of the third front arc clamping part, and a fourth rear arc clamping part disposed on the left side of the third rear arc clamping part. The fourth front arc clamping part is detachably connected to the third front arc clamping part, and the fourth rear arc clamping part is detachably connected to the third front arc clamping part.
[0027] Beneficial effects: The fourth front / rear arc clamping part, as an extension component of the third clamping mechanism, achieves flexible adjustment of the clamping range through a "detachable stacking" method. By adding or removing the fourth front / rear arc clamping part, the overall length and curvature of the front and rear clamping structures can be changed, thereby adapting to pipe fittings of different diameters or shapes.
[0028] Furthermore, the fourth front arc clamping part and the fourth rear arc clamping part include multiple sets, each set having a different clamping radius; the first upper arc clamping part and the first lower arc clamping part include multiple sets, each set having a different clamping radius.
[0029] Beneficial effects: By prefabricating multiple sets of arc clamping parts with different radii (fourth front / rear clamping part, first upper / lower clamping part), a "modular radius adaptation system" is constructed. Multiple sets of clamping parts can cover the diameter range of pipe fittings with different pipe diameters, eliminating the need to replace the entire equipment due to differences in pipe fitting specifications. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the overall structure of the plastic pipe cutting device based on a band saw in Embodiment 1 of this utility model;
[0031] Figure 2 This is a partial structural schematic diagram of the plastic pipe cutting device based on a band saw in Embodiment 1 of this utility model;
[0032] Figure 3 This is a schematic diagram of the replacement assembly structure of each clamping part in the first clamping mechanism of this utility model in Embodiment 1;
[0033] Figure 4 This is a schematic diagram of the replacement assembly structure of each clamping part in the third clamping mechanism of Embodiment 1 of this utility model;
[0034] Figure 5 This is a schematic diagram of the second clamping mechanism in Embodiment 1 of this utility model. Detailed Implementation
[0035] The following detailed description illustrates the specific implementation method:
[0036] The markings in the accompanying drawings include: cutting table 1, guide wheel mechanism 2, support plate 20, guide wheel 21, first clamping mechanism 3, mounting frame 30, first cylinder 31, second upper arc clamping part 32, second lower arc clamping part 33, slide rail 34, first upper arc clamping part 35, first lower arc clamping part 36, third clamping mechanism 4, third rear arc clamping part 40, third front arc clamping part 41, fourth rear arc clamping part 42, fourth front arc clamping part 43, clamping strip 44, clamping groove 45, band saw cutter 5, second clamping mechanism 6, fixing frame 60, support frame 61, second cylinder 62, third upper arc clamping part 63, and third lower arc clamping part 64.
[0037] The basic implementation examples are as follows: Figure 1 and Figure 2 As shown: A pipe clamping mechanism for a band saw cutting device includes a first clamping mechanism 3, a third clamping mechanism 4, and a second clamping mechanism 6 arranged sequentially from left to right on a cutting table 1; in this embodiment, the band saw cutting mechanism 5 for cutting pipes is arranged between the third clamping mechanism 4 and the second clamping mechanism 6, thereby realizing the cutting of pipes.
[0038] The first clamping mechanism 3 includes a mounting frame 30 with openings at both the left and right ends. A first clamping member and a second clamping member are sequentially arranged from left to right within the mounting frame 30. A first mounting hole is provided at the upper end of the mounting frame 30 for the first cylinder 31 to extend into. The piston rod of the first cylinder 31 extends into the mounting frame 30 through the first mounting hole. In this embodiment, the piston rod of the first cylinder 31 extends into the first mounting hole and into the mounting frame 30. A first fixing plate is provided on the side of the first mounting hole. The first fixing plate is fixed to the mounting frame 30, and the first cylinder 31 is fixed to the first fixing plate by bolts and nuts.
[0039] like Figure 3 As shown, the second clamping member includes a second upper arc clamping part 32 and a second lower arc clamping part 33; the second lower arc clamping part 33 is welded and fixed to the inner bottom surface of the mounting frame 30, and the second upper arc clamping part 32 is welded and fixedly connected to the piston rod of the first cylinder 31.
[0040] The first clamping component includes a first upper arc clamping part 35 and a first lower arc clamping part 36. The first upper arc clamping part 35 is detachably connected to the second upper arc clamping part 32, and the first lower arc clamping part 36 is detachably connected to the second lower arc clamping part 33. In this embodiment, the first upper arc clamping part 35 and the second upper arc clamping part 32, and the first lower arc clamping part 36 and the second lower arc clamping part 33 are detachably connected by bolts and nuts. Moreover, the first upper arc clamping part 35 and the first lower arc clamping part 36 include multiple sets, each set corresponding to a different clamping radius. For plastic pipe fittings of different sizes, the first upper arc clamping part 35 and the first lower arc clamping part 36 with different clamping radii can be replaced according to the actual situation.
[0041] The first clamping mechanism 3 further includes a sliding mechanism, which includes a slide rail 34 fixed on the cutting table 1, a slider, a fixing block, and a fourth cylinder; in this embodiment, the slide rail 34 is horizontally arranged along the left and right direction.
[0042] The slider slides in cooperation with the slide rail 34, and the slider is welded and fixedly connected to the lower end face of the mounting frame 30. The fixing block is fixedly connected to the front side wall of the mounting frame 30 by bolts and nuts. The fourth cylinder is fixed on the front side wall of the cutting table 1, and the piston rod of the fourth cylinder is fixedly connected to the fixing block. In this embodiment, a connecting ring is provided on the end of the third cylinder away from the piston rod, and a connecting screw and bolt are provided on the front side wall of the cutting table 1. The connecting ring is sleeved on the connecting screw, and the bolt is tightened to fix the third cylinder to the cutting table 1. Similarly, a connecting ring is also provided on the piston rod of the fourth cylinder, and a connecting screw and bolt are also provided on the fixing plate. The connecting ring is sleeved on the connecting screw, and the bolt is tightened to fix the piston rod of the third cylinder to the fixing block.
[0043] like Figure 4 As shown, the third clamping mechanism 4 includes a third front arc clamping part 41, a third rear arc clamping part 40, and a third cylinder; the third front arc clamping part 41 and the third rear arc clamping part 40 are arranged one after the other on the cutting table 1.
[0044] The third rear arc clamping part 40 is welded and fixed to the cutting table 1. The third front arc clamping part 41 is slidably engaged with the cutting table 1. The right end face of the third front arc clamping part 41 is fixedly connected to the piston rod of the third cylinder. The third cylinder is fixed to the cutting table 1. In this embodiment, a sliding groove is provided on the cutting table 1 for the third arc clamping part to slide. A corresponding guide block is welded and fixed to the lower end face of the third arc clamping part. The guide block slides in the sliding groove, thereby realizing the sliding of the third front arc clamping part 41 on the cutting table 1.
[0045] The third clamping mechanism 4 further includes a fourth front arc clamping part 43 disposed on the left side of the third front arc clamping part 41, and a fourth rear arc clamping part 42 disposed on the left side of the third rear arc clamping part 40. The fourth front arc clamping part 43 is detachably connected to the third front arc clamping part 41, and the fourth rear arc clamping part 42 is detachably connected to the third front arc clamping part 41. In this embodiment, the fourth front arc clamping part 43 and the fourth rear arc clamping part 42 are provided with slots 45, and the third front arc clamping part 41 and the third front arc clamping part 42 are provided with clips 44 that are detachably fixedly connected to the slots 45. The fourth front arc clamping part 43 and the third front arc clamping part 41 are detachably connected through the cooperation of the clips 44 and the slots 45. The fourth front arc clamping part 43 and the fourth rear arc clamping part 42 include multiple sets, each set corresponding to a different clamping radius; for plastic pipe fittings of different sizes, the fourth front arc clamping part 43 and the fourth rear arc clamping part 42 with different clamping radii can be replaced according to the actual situation.
[0046] like Figure 5 As shown, the second clamping mechanism 6 includes a support frame 61 and a fixed frame 60. The fixed frame 60 is welded to the side wall of the cutting table 1, and the support frame 61 is welded and fixed to the fixed frame 60. The support frame 61 has a second mounting hole for the piston rod of the second cylinder 62 to extend into. The piston rod of the second cylinder 62 extends downward through the second mounting hole and is fixedly connected to the third upper arc clamping part 63. A third lower arc clamping part 64 is provided on the fixed frame 60 directly below the third upper arc clamping part 63. In this embodiment, a corresponding second fixing plate is welded and fixed to the support frame 61, and the second cylinder 62 is fixed to the second fixing plate by bolts and nuts. The piston rod of the second cylinder 62 extends into the second mounting hole and is welded and fixed to the third upper arc clamping part 63.
[0047] Place the pipe fitting on the cutting table 1, aligning its left end with the first clamping mechanism 3, its middle part with the third clamping mechanism 4, and its right end extending below the second clamping mechanism 6. Depending on the pipe fitting diameter, replace the first upper / lower arc clamping part of the first clamping mechanism 3 and the fourth front / rear arc clamping part of the third clamping mechanism 4 to ensure that the clamping radii match.
[0048] Then, the fourth cylinder drives the first clamping mechanism 3 to slide, so that the first clamping part is aligned with the left end of the pipe, and the first cylinder 31 presses down to clamp the left end; the third cylinder pushes the third front arc clamping part 41, which cooperates with the third rear arc clamping part 40 to clamp the middle part of the pipe; the second cylinder 62 presses down the third upper arc clamping part 63, which, together with the third lower arc clamping part 64, presses down to clamp the right end of the pipe.
[0049] The band saw cutting machine starts at mechanism 5 and cuts the pipe between the third and second clamping mechanisms 6. The three clamping mechanisms maintain a continuous clamping force to prevent the pipe from shifting during cutting vibration and ensure cutting accuracy. After cutting, the piston rods of each cylinder retract and the clamping parts are released. The fourth cylinder drives the first clamping mechanism 3 to reset, removes the cut pipe, and enters the next cycle.
[0050] In this embodiment, to better ensure that the pipe fittings can quickly reach the clamping parts of each clamping mechanism, a guide wheel mechanism 2 is also provided on the cutting table 1, wherein the guide wheel mechanism 2 is located on the left side of the first clamping mechanism 3. The guide wheel mechanism 2 includes support plates 20 arranged at the front and rear, and guide wheels 21 arranged between the support plates 20. The guide wheels 21 are rotatably connected to the support plates 20 through a rotating shaft. In this embodiment, the support parts are welded and fixed to the upper surface of the cutting table 1 at the front and rear.
[0051] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A pipe clamping mechanism for a band saw cutting device, characterized in that: It includes a first clamping mechanism and a second clamping mechanism arranged sequentially from left to right on the cutting table; The first clamping mechanism includes a mounting frame with openings at both the left and right ends. The mounting frame is provided with a first clamping member and a second clamping member from left to right. The upper end of the mounting frame is provided with a first mounting hole for the first cylinder to extend into. The piston rod of the first cylinder extends into the mounting frame through the first mounting hole. The second clamping component includes a second upper arc clamping part and a second lower arc clamping part; the second lower arc clamping part is fixed to the inner bottom surface of the mounting frame, and the second upper arc clamping part is fixedly connected to the piston rod of the first cylinder. The first clamping member includes a first upper arc clamping part and a first lower arc clamping part. The first upper arc clamping part is detachably connected to the second upper arc clamping part, and the first lower arc clamping part is detachably connected to the second lower arc clamping part. The second clamping mechanism includes a support frame and a fixed frame. The support frame is fixed on the fixed frame. The support frame has a second mounting hole for the piston rod of the second cylinder to extend into. The piston rod of the second cylinder extends downward through the second mounting hole and is fixedly connected to the third upper arc clamping part. The fixed frame has a third lower arc clamping part located directly below the third upper arc clamping part.
2. The pipe clamping mechanism for a band saw cutting device according to claim 1, characterized in that: A third clamping mechanism is also provided between the first clamping mechanism and the second clamping mechanism. The third clamping mechanism includes a third front arc clamping part, a third rear arc clamping part, and a third cylinder. The third front arc clamping part and the third rear arc clamping part are arranged one in front of the other on the cutting table. The third rear arc clamping part is fixed on the cutting table, the third front arc clamping part is slidably engaged with the cutting table, the right end face of the third front arc clamping part is fixedly connected to the piston rod of the third cylinder, and the third cylinder is fixed on the cutting table.
3. The pipe clamping mechanism for a band saw cutting device according to claim 2, characterized in that: The first clamping mechanism further includes a sliding mechanism, which includes a slide rail, a slider, a fixing block, and a fourth cylinder fixed on the cutting table; The slider slides in conjunction with the slide rail, the slider is fixedly connected to the lower end face of the mounting frame, the fixing block is fixedly connected to the front side wall of the mounting frame, the fourth cylinder is fixed on the front side wall of the cutting table, and the piston rod of the fourth cylinder is fixedly connected to the fixing block.
4. The pipe clamping mechanism for a band saw cutting device according to claim 3, characterized in that: The third clamping mechanism further includes a fourth front arc clamping part disposed on the left side of the third front arc clamping part, and a fourth rear arc clamping part disposed on the left side of the third rear arc clamping part. The fourth front arc clamping part is detachably connected to the third front arc clamping part, and the fourth rear arc clamping part is detachably connected to the third front arc clamping part.
5. The pipe clamping mechanism for a band saw cutting device according to claim 4, characterized in that: The fourth front arc clamping part and the fourth rear arc clamping part include multiple sets, each set having a different clamping radius; the first upper arc clamping part and the first lower arc clamping part include multiple sets, each set having a different clamping radius.