Cutting device for instrument and apparatus manufacturing

Abstract

The invention relates to the technical field of laser cutting, in particular to a cutting device for instrument manufacturing, which comprises a mounting frame, a portal frame erected in the middle of the mounting frame and a laser cutting device arranged on the portal frame, and an inner fixing assembly is arranged at one end of the mounting frame; the inner fixing assembly comprises a rotary installation part, a telescopic rod and a plurality of inner supporting strips, the rotary installation part is fixedly installed on the installation frame, the telescopic rod is fixedly connected to the rotary installation part, the telescopic rod is divided into a telescopic section and a fixed section, and the inner supporting strips are annularly and fixedly connected between the telescopic section and the fixed section; an inner supporting assembly is arranged at the front end of the telescopic rod and is in an umbrella shape, and the outer edge of the inner supporting assembly is used for supporting the machined pipe fitting from the interior. Concentrated clamping force is converted into evenly-distributed radial pressure, the problems of indentation, ovalization deformation and the like caused by traditional outer clamping are fundamentally solved, and the clamping device is particularly suitable for machining of thin-wall and precise pipe fittings.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and in particular to a cutting device for manufacturing instruments and meters. Background Technology

[0002] In the processing of instruments and meters, pipes need to be cut. Pipe laser cutting machines use a high-energy-density laser beam to irradiate the surface of the pipe, causing it to quickly reach its melting or vaporization point, thus achieving cutting. The CNC system precisely controls the relative movement between the laser head and the pipe, thereby cutting various complex patterns, holes, and end shapes on the pipe.

[0003] Patent CN117532179B discloses a preheating pipe cutting device. This application provides a preheating pipe cutting device, comprising: a support base, vertically mounted on a horizontal surface; a conveying assembly, disposed on one side of the support base, for conveying a long pipe; a fixing plate, fixedly connected to the support base, having a through hole for the long pipe to pass through, and a laser cutter mounted on the fixing plate; a support frame, fixedly connected to the middle position of the support base; a chip removal assembly, disposed on the support base, for cleaning the cut long pipe and the debris inside the cut pipe; and a support assembly, disposed on the support frame, for supporting the long pipe during cutting and supporting the cut pipe during cleaning. This application can reduce the impact of waste debris on the subsequent use of the pipe and can reduce the workload and difficulty of cleaning the pipe.

[0004] Existing pipe fittings are mostly clamped from the outside when fixed and limited. Improper control of clamping force can easily lead to local pressure deformation, ellipticization, or surface scratches on the pipe fitting. In particular, for pipe fittings with different diameters and different material hardness, it is difficult to set a universal and safe clamping force, which significantly increases the product defect rate and affects the assembly accuracy and performance of instruments. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as improper clamping force control, which can easily lead to localized pressure deformation, ellipticization, or surface scratches on pipe fittings. In particular, for pipe fittings with different diameters and materials with varying hardness, it is difficult to set a universal and safe clamping force, which significantly increases the product defect rate and affects the assembly accuracy and performance of instruments. Therefore, this invention proposes a cutting device for instrument manufacturing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A cutting device for manufacturing instruments and meters includes: a mounting frame, two sets of clamping arms arranged symmetrically, a gantry frame mounted in the middle of the mounting frame, and a laser cutting device mounted on the gantry frame, wherein one end of the mounting frame is provided with an internal fixing component; The internal fixing assembly includes a rotating mounting component, a telescopic rod, and multiple inner support bars. The rotating mounting component is fixedly mounted on the mounting frame, and the telescopic rod is fixedly connected to the rotating mounting component. The telescopic rod is divided into a telescopic section and a fixed section. Multiple inner support bars are fixedly connected in a ring between the telescopic section and the fixed section to form an inner support cylinder. The telescopic rod extends and retracts to change the distance between the inner support cylinder and the telescopic rod. The telescopic rod is provided with an inner support assembly at its front end. The inner support assembly is umbrella-shaped and its outer edge is used to support the processed pipe fitting from the inside. The inner support assembly and the inner fixing assembly form a double support ring for fixing the processed pipe fitting from the inside.

[0007] Preferably, the laser cutting device includes a movable frame, a laser tip, and a jet canister. The movable frame is fixedly mounted on a gantry, the laser tip is fixedly mounted on the movable end of the movable frame, and the jet canister is fixedly connected to the upper end of the laser tip for spraying protective gas.

[0008] Preferably, the rotating mounting component includes a side frame, a mounting tube, and a rotating ring. The side frame is fixedly connected between two mounting frames and is away from the feed end. The mounting tube is fixedly installed in the middle of the side frame. The rotating ring is horizontally positioned between the two mounting frames and is rotatably installed inside the mounting tube. The telescopic fixed section is fixedly connected inside the rotating ring.

[0009] Preferably, the installation pipe is equipped with an air extraction assembly, which includes a motor, an impeller, and a connecting pipe. The motor is fixedly installed inside the installation pipe, the impeller is fixedly connected to the motor output end, and the connecting pipe is connected to the end of the installation pipe away from the telescopic rod. The fixed end of the telescopic rod has multiple air guide ports in a ring shape on its side. The air extraction assembly is used to form a gas flow from the telescopic rod to the connecting pipe.

[0010] Preferably, the inner support assembly includes a rotating rod, multiple support members, multiple support plates, and a spring support ring. The rotating rod is rotatably mounted at the telescopic end of the telescopic rod. The multiple support plates are rotatably connected in a ring shape to the end of the rotating rod away from the telescopic rod. The spring support ring is sleeved on the rotating rod. The multiple support members are rotatably connected inside the support plates and on the spring support ring.

[0011] Preferably, a reinforcing structure is provided on the plurality of inner support bars, the reinforcing structure being used to increase the contact area between the inner support bars and the processed pipe fitting.

[0012] Preferably, the reinforcing structure includes multiple elastic shafts, two reinforcing rings, and multiple contact pieces. The multiple elastic shafts are fixedly installed in the middle of the inner support bar, the two reinforcing rings are respectively fixedly connected to both ends of the multiple inner support bars for connecting the inner support cylinder and the telescopic rod, and the multiple contact pieces are respectively fixedly connected to the middle of the inner support bar on the side away from the telescopic rod.

[0013] Preferably, a scraper ring is fixedly connected to one end of the plurality of support plates away from the rotating rod in a ring. The scraper ring is made of elastic material and is inclined on both sides for scraping and fixing the processing pipe. Three support scraper strips are fixedly connected to the scraper ring in a ring, and a collection cloth is provided between the two support scraper strips located at the bottom.

[0014] Preferably, a limiting component is provided between the spring support ring and the inner support cylinder. The limiting component includes a retaining ring, a filter ring, a rotating collar, an annular bar, a slider, and a pulling member. The retaining ring is made of elastic material and has a retaining groove inside. Multiple elastic shafts are slidably engaged inside the retaining ring. The rotating collar is rotatably disposed at the end of the telescopic section of the telescopic rod. The inner and outer edges of the filter ring are respectively connected to the retaining ring and the rotating collar to form a frustum-shaped mesh. The annular bar is fixedly connected to the side of the filter ring near the telescopic rod. The slider is slidably disposed in the inner groove of the annular bar. The pulling member is fixedly connected between the spring support ring and the slider.

[0015] Preferably, the pulling component includes two pull ropes and a rotating block, with the two pull ropes fixedly connected to both ends of the rotating block, and the two pull ropes being able to rotate relative to each other.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses two internal support rings, one in front and one behind, to form a stable statically determinate support system. They transfer the clamping force from the outside of the pipe to the inside and transform the concentrated clamping force into a uniformly distributed radial pressure, fundamentally eliminating problems such as indentation and elliptical deformation caused by traditional external clamping. It is particularly suitable for processing thin-walled and precision pipes. 2. Driven by a motor, the exhaust assembly generates negative pressure through an impeller, creating an airflow that originates near the cutting area, passes through the air guide, and is finally discharged from the connecting pipe. This airflow effectively removes high-temperature fumes and debris generated during laser cutting from the cutting kerf, protecting the laser lens and improving cutting quality. Simultaneously, the airflow also carries away some heat, providing auxiliary cooling. The unfolded filter rings also act as a primary filter, intercepting larger debris and preventing it from entering deeper into the exhaust system, thus protecting the impeller and motor. 3. In order to ensure the deformation and internal support effect of the inner support bar, the deformation of the inner support bar is guaranteed by the elastic shaft, and multiple contact pieces also increase the contact area with the inside of the pipe, thereby improving the service life of the internal fixing components. 4. While the support plate unfolds, the moving scraper ring can scrape away foreign objects near the support point, ensuring the reliability and accuracy of the support. At the same time, after processing is completed, the scraper ring can also scrape and clean the impurities on the inner wall of the pipe. The collection cloth is used to collect the impurities scraped and cleaned in this way. 5. Locking the elastic shaft is equivalent to restricting the retraction movement of the inner support bar, thereby locking the inner fixing component in its current expanded state. This forms a mechanical interlock: after the inner support component unfolds, the limiting component is tightened, and finally the inner fixing component is locked. This design ensures the absolute reliability of the internal support during the cutting process and avoids the support loosening due to vibration or internal force. Attached Figure Description

[0017] Figure 1 This is a front structural diagram of a cutting device for manufacturing instruments and meters according to the present invention; Figure 2 This is a schematic diagram of the back structure of a cutting device for manufacturing instruments and meters according to the present invention; Figure 3 This is a schematic diagram of the structure of a laser cutting device for an instrument manufacturing cutting apparatus proposed in this invention; Figure 4 This is a schematic diagram of the internal fixing component structure of a cutting device for instrument manufacturing proposed in this invention; Figure 5 This is a cross-sectional view of the internal fixing component of a cutting device for instrument manufacturing proposed in this invention; Figure 6 This is a schematic diagram of the internal support component structure of a cutting device for instrument manufacturing proposed in this invention; Figure 7 This is a schematic diagram of the unfolded structure of the internal fixing component of a cutting device for instrument manufacturing proposed in this invention; Figure 8 This is a schematic diagram of the reinforced structure of a cutting device for instrument manufacturing proposed in this invention; Figure 9 This is a schematic diagram of the limiting component structure of a cutting device for instrument manufacturing proposed in this invention; Figure 10 This is a schematic diagram illustrating the state changes of the internal fixing components of a cutting device for instrument manufacturing proposed in this invention. Figure 11 This is a schematic diagram showing the state changes of the limiting component of a cutting device for instrument manufacturing proposed in this invention.

[0018] In the diagram: 1. Mounting frame; 2. Clamping arm; 3. Laser cutting device; 31. Moving frame; 32. Laser tip; 33. Jet canister; 4. Internal fixing assembly; 41. Rotating mounting component; 411. Side frame; 412. Mounting tube; 413. Rotating ring; 42. Telescopic rod; 43. Internal support bar; 5. Internal support assembly; 51. Rotating rod; 52. Support component; 53. Support plate; 54. Spring support ring; 6. Air extraction assembly; 61. Motor; 62. Impeller; 63. Connecting pipe; 7. Reinforcing structure; 71. Elastic shaft; 72. Reinforcing ring; 73. Contact plate; 8. Limiting assembly; 81. Snap ring; 82. Filter ring; 83. Rotating collar; 84. Annular bar; 85. Slider; 86. Pulling component; 861. Pull rope; 862. Rotating block; 9. Scraper ring; 10. Support scraper bar; 11. Collection cloth. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0021] Reference Figures 1-11 A cutting device for manufacturing instruments and meters includes: a mounting frame 1, two sets of clamping arms 2 arranged symmetrically, a gantry frame erected in the middle of the mounting frame 1, and a laser cutting device 3 set on the gantry frame. One end of the mounting frame 1 is provided with an internal fixing component 4. The internal fixing component 4 includes a rotating mounting part 41, a telescopic rod 42, and multiple inner support bars 43. The rotating mounting part 41 is fixedly mounted on the mounting frame 1. The telescopic rod 42 is fixedly connected to the rotating mounting part 41. The telescopic rod 42 is divided into a telescopic section and a fixed section. Multiple inner support bars 43 are fixedly connected in a ring between the telescopic section and the fixed section to form an inner support cylinder. The telescopic rod 42 is telescopic to change the distance between the inner support cylinder and the telescopic rod 42. The telescopic rod 42 is provided with an inner support component 5 at its front end. The inner support component 5 is umbrella-shaped and its outer edge is used to support the processed pipe from the inside. The inner support component 5 and the inner fixing component 4 form a double support ring for fixing the processed pipe from the inside.

[0022] In embodiments applying the above technical solutions, The symmetrical clamping arms 2 can perform slight auxiliary clamping and drive the loading and unloading of pipes. Their main function is no longer to provide the main clamping force, but to prevent the pipes from rotating. The main support force is borne by the internal system.

[0023] When the overhanging part of the pipe fitting is cut, it vibrates or sags due to its own weight or cutting force, affecting the cut quality. Existing fixing devices cannot provide effective and uniform radial support for different diameter sections of the pipe fitting from the inside. In this invention, the pipe fitting to be processed is fitted onto the inner support assembly 5. When the inner support assembly 5 enters in front of the area to be cut of the pipe fitting, the spring support ring 54 moves axially along the rotating rod 51 under its own elastic force or the push of the mechanism. The support member 52 pushes multiple support plates 53 outward to form an umbrella-shaped support surface. This support surface fits against the pipe wall from the inside, providing axial positioning and radial support for the front end of the pipe fitting, preventing the front part of the pipe fitting from shaking or sag during cutting. Then, the telescopic section of the telescopic rod 42 is controlled to retract backward. Since the two ends of multiple inner support bars 43 are respectively hinged to the telescopic section and the fixed section, the retraction of the telescopic section will force the middle of these inner support bars 43 to bulge outward, forming a bulging inner support cylinder. This inner support cylinder tightly and uniformly supports the pipe wall from the inside, forming a second support ring.

[0024] After the cutting is completed, the control system first extends the telescopic section of the telescopic rod 42 slightly forward to release the tension of the internal fixing component 4, and the limiting component 8 relaxes accordingly. Then, the internal support component 5 is retracted, and finally the entire internal support system is removed from the pipe to complete one work cycle.

[0025] This invention uses two internal support rings, one in front and one behind, to form a stable statically determinate support system. These rings transfer the clamping force from the outside of the pipe to the inside and transform the concentrated clamping force into a uniformly distributed radial pressure. This fundamentally eliminates problems such as indentation and elliptical deformation caused by traditional external clamping, and is particularly suitable for processing thin-walled and precision pipes.

[0026] The preferred technical solution in this embodiment is: Reference Figure 3 The laser cutting device 3 includes a movable frame 31, a laser end 32, and a jet canister 33. The movable frame 31 is fixedly installed on the gantry frame, the laser end 32 is fixedly installed on the movable end of the movable frame 31, and the jet canister 33 is fixedly connected to the upper end of the laser end 32 for spraying out protective gas. Reference Figure 4 The rotating mounting component 41 includes a side frame 411, a mounting tube 412, and a rotating ring 413. The side frame 411 is fixedly connected between two mounting frames 1 and is away from the feed end. The mounting tube 412 is fixedly installed in the middle of the side frame 411. The mounting frame 1 is horizontally arranged between the two mounting frames 1. The rotating ring 413 is rotatably installed inside the mounting tube 412. The telescopic fixed section is fixedly connected inside the rotating ring 413. Reference Figure 5 The installation pipe 412 is equipped with an air extraction assembly 6, which includes a motor 61, an impeller 62, and a connecting pipe 63. The motor 61 is fixedly installed inside the installation pipe 412, the impeller 62 is fixedly connected to the output end of the motor 61, and the connecting pipe 63 is connected to the end of the installation pipe 412 away from the telescopic rod 42. The fixed end of the telescopic rod 42 has multiple air guide ports in a ring shape on its side. The air extraction assembly 6 is used to form a gas flow from the telescopic rod 42 to the connecting pipe 63.

[0027] During laser cutting, cutting fumes contaminate optical components, affect the cutting line and cut quality, and heat accumulation may cause components or equipment to overheat.

[0028] Driven by motor 61, the exhaust assembly 6 generates negative pressure through impeller 62, forming an airflow that originates near the cutting area, passes through the air guide, and is finally discharged from connecting pipe 63. This airflow effectively draws away the high-temperature fumes and debris generated during laser cutting from the cutting kerf, protecting the laser lens and improving cutting quality. Simultaneously, the airflow also carries away some heat, providing auxiliary cooling. The unfolded filter ring 82 also acts as a primary filter, intercepting larger debris and preventing it from entering the deeper parts of the exhaust system, thus protecting impeller 62 and motor 61.

[0029] Reference Figure 6 and Figure 7 The inner support assembly 5 includes a rotating rod 51, multiple support members 52, multiple support plates 53, and a spring support ring 54. The rotating rod 51 is rotatably mounted at the telescopic end of the telescopic rod 42. The multiple support plates 53 are rotatably connected in a ring to the end of the rotating rod 51 away from the telescopic rod 42. The spring support ring 54 is sleeved on the rotating rod 51. The multiple support members 52 are rotatably connected inside the support plates 53 and on the spring support ring 54.

[0030] Reference Figure 8 A reinforcing structure 7 is provided on each of the inner support bars 43, and the reinforcing structure is used to increase the contact area between the inner support bars 43 and the processed pipe fitting; The reinforcing structure includes multiple elastic shafts 71, two reinforcing rings 72, and multiple contact pieces 73. The multiple elastic shafts 71 are fixedly installed in the middle of the inner support bar 43. The two reinforcing rings 72 are respectively fixedly connected to both ends of the multiple inner support bars 43 for connecting the inner support cylinder and the telescopic rod 42. The multiple contact pieces 73 are respectively fixedly connected to the middle of the inner support bar 43 on the side away from the telescopic rod 42.

[0031] To ensure the deformation and internal support effect of the inner support bar 43, the deformation of the inner support bar 43 is guaranteed by the elastic shaft 71, and the multiple contact pieces 73 also increase the contact area with the inside of the pipe, thereby improving the service life of the internal fixing component 4.

[0032] Reference Figure 9 A scraper ring 9 is fixedly connected in an annular shape to one end of the multiple support plates 53 away from the rotating rod 51. The scraper ring 9 is made of elastic material and is inclined on both sides for scraping and fixing the processing pipe. Three support scraper strips 10 are fixedly connected in an annular shape on the scraper ring 9, and a collection cloth 11 is provided between the two support scraper strips 10 located at the bottom.

[0033] During the cutting process, oxides or impurities may adhere to the inner wall of the pipe, affecting the contact accuracy and friction between the support 52 and the pipe wall, while also increasing the subsequent cleaning steps and reducing processing efficiency.

[0034] While the support plate 53 unfolds, the moving scraper ring 9 can scrape away foreign objects near the support point to ensure the reliability and accuracy of the support. At the same time, after the processing is completed, the scraper ring 9 can also scrape and clean the impurities on the inner wall of the pipe. The collection cloth 11 is used to collect the impurities scraped and cleaned in this way.

[0035] Reference Figure 9 and Figure 11 A limiting component 8 is provided between the spring support ring 54 and the inner support cylinder. The limiting component 8 includes a retaining ring 81, a filter ring 82, a rotating collar 83, an annular bar 84, a slider 85, and a pulling member 86. The retaining ring 81 is made of elastic material and has a retaining groove inside. Multiple elastic shafts 71 are slidably engaged inside the retaining ring 81. The rotating collar 83 is rotatably disposed at the end of the telescopic section of the telescopic rod 42. The inner and outer edges of the filter ring 82 are respectively connected to the retaining ring 81 and the rotating collar 83 to form a frustum-shaped mesh. The annular bar 84 is fixedly connected to the side of the filter ring 82 near the telescopic rod 42. The slider 85 is slidably disposed in the inner groove of the annular bar 84. The pulling member 86 is fixedly connected between the spring support ring 54 and the slider 85. The pulling component 86 includes two pull ropes 861 and a rotating block 862. The two pull ropes 861 are fixedly connected to both ends of the rotating block 862, and the two pull ropes 861 can rotate relative to each other.

[0036] The internal fixing component 4 may loosen due to vibration or changes in internal force during the manufacturing process, leading to support failure. The limiting component 8 is a key mechanism that connects the internal support component 5 and the internal fixing component 4 and ensures that the internal support component 5 will not accidentally retract when in the supported state.

[0037] When the inner support assembly 5 unfolds and the inner support cylinder of the inner fixing assembly 4 expands, the pulling member 86 connected to the spring support ring 54 is tensioned. This tension is transmitted to the annular bar 84 through the slider 85, which in turn pulls the entire filter ring 82. The filter ring 82 is frustum-shaped, and its contraction movement generates a radial tightening component force, which acts on the retaining ring 81. Under the action of the radial tightening force, the retaining ring 81 will tightly hold the multiple elastic shafts 71 sliding inside it. The elastic shafts 71 are the central reinforcing structure 7 of the inner support bar 43. Locking the elastic shafts 71 is equivalent to restricting the retraction movement of the inner support bar 43, thereby locking the inner fixing assembly 4 in the current expanded state. This forms a mechanical interlock: after the inner support assembly 5 unfolds, the limiting assembly 8 is tightened, and finally the inner fixing assembly 4 is locked. This design ensures the absolute reliability of the internal support during the cutting process and avoids the support loosening due to vibration or internal force.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cutting device for manufacturing instruments and meters, comprising: The mounting frame, two symmetrically arranged clamping arms, a gantry frame mounted in the middle of the mounting frame, and a laser cutting device mounted on the gantry frame are characterized in that one end of the mounting frame is provided with an internal fixing component; The internal fixing assembly includes a rotating mounting component, a telescopic rod, and multiple inner support bars. The rotating mounting component is fixedly mounted on the mounting frame, and the telescopic rod is fixedly connected to the rotating mounting component. The telescopic rod is divided into a telescopic section and a fixed section. Multiple inner support bars are fixedly connected in a ring between the telescopic section and the fixed section to form an inner support cylinder. The telescopic rod extends and retracts to change the distance between the inner support cylinder and the telescopic rod. The telescopic rod is provided with an inner support assembly at its front end. The inner support assembly is umbrella-shaped and its outer edge is used to support the processed pipe fitting from the inside. The inner support assembly and the inner fixing assembly form a double support ring for fixing the processed pipe fitting from the inside.

2. The cutting device for instrument manufacturing according to claim 1, characterized in that, The laser cutting device includes a moving frame, a laser tip, and a jet canister. The moving frame is fixedly mounted on a gantry frame, the laser tip is fixedly mounted on the moving end of the moving frame, and the jet canister is fixedly connected to the upper end of the laser tip for spraying protective gas.

3. The cutting device for instrument manufacturing according to claim 2, characterized in that, The rotating mounting component includes a side frame, a mounting tube, and a rotating ring. The side frame is fixedly connected between two mounting frames and is away from the feed end. The mounting tube is fixedly installed in the middle of the side frame. The rotating ring is horizontally positioned between the two mounting frames and is rotatably installed inside the mounting tube. The telescopic fixed section is fixedly connected inside the rotating ring.

4. The cutting device for instrument manufacturing according to claim 3, characterized in that, An air extraction assembly is installed inside the installation pipe. The air extraction assembly includes a motor, an impeller, and a connecting pipe. The motor is fixedly installed inside the installation pipe, the impeller is fixedly connected to the motor output end, and the connecting pipe is connected to the end of the installation pipe away from the telescopic rod. Multiple air guide ports are circumferentially opened on the side of the fixed end of the telescopic rod. The air extraction assembly is used to create gas flow from the telescopic rod to the connecting pipe.

5. The cutting device for instrument manufacturing according to claim 4, characterized in that, The inner support assembly includes a rotating rod, multiple support members, multiple support plates, and a spring support ring. The rotating rod is rotatably mounted on the telescopic end of the telescopic rod. The multiple support plates are rotatably connected in a ring shape to the end of the rotating rod away from the telescopic rod. The spring support ring is sleeved on the rotating rod. The multiple support members are rotatably connected inside the support plates and on the spring support ring.

6. The cutting device for instrument manufacturing according to claim 5, characterized in that, The inner support bars are provided with reinforcing structures, which are used to increase the contact area between the inner support bars and the processed pipe fittings.

7. The cutting device for instrument manufacturing according to claim 6, characterized in that, The reinforcing structure includes multiple elastic shafts, two reinforcing rings, and multiple contact pieces. The multiple elastic shafts are fixedly installed in the middle of the inner support bar. The two reinforcing rings are respectively fixedly connected to both ends of the multiple inner support bars for connecting the inner support cylinder and the telescopic rod. The multiple contact pieces are respectively fixedly connected to the middle of the inner support bar on the side away from the telescopic rod.

8. The cutting device for instrument manufacturing according to claim 7, characterized in that, Multiple support plates are fixedly connected in a ring to one end away from the rotating rod. The scraper ring is made of elastic material and is inclined on both sides for scraping and fixing the processing pipe. Three support scraper strips are fixedly connected in a ring on the scraper ring, and a collection cloth is provided between the two support scraper strips located at the bottom.

9. A cutting device for instrument manufacturing according to claim 8, characterized in that, A limiting assembly is provided between the spring support ring and the inner support cylinder. The limiting assembly includes a retaining ring, a filter ring, a rotating collar, an annular bar, a slider, and a pulling member. The retaining ring is made of elastic material and has a retaining groove inside. Multiple elastic shafts are slidably engaged inside the retaining ring. The rotating collar is rotatably disposed at the end of the telescopic section of the telescopic rod. The inner and outer edges of the filter ring are respectively connected to the retaining ring and the rotating collar to form a frustum-shaped mesh. The annular bar is fixedly connected to the side of the filter ring near the telescopic rod. The slider is slidably disposed in the inner groove of the annular bar. The pulling member is fixedly connected between the spring support ring and the slider.

10. A cutting device for instrument manufacturing according to claim 9, characterized in that, The pulling component includes two pull ropes and a rotating block. The two pull ropes are fixedly connected to both ends of the rotating block, and the two pull ropes can rotate relative to each other.

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