Digital cutting machining equipment for high-precision prefabricated finished air duct

Abstract

The invention discloses digital cutting machining equipment for a high-precision prefabricated finished air duct, and belongs to the technical field of air duct machining. The device comprises a machine tool, a two-dimensional plane moving platform is arranged on the machine tool, a laser welding head is arranged at the output end of the two-dimensional plane moving platform, the two-dimensional plane moving platform can drive the laser welding head to do two-dimensional plane motion above a galvanized sheet, and the device further comprises a linkage conveying device arranged on the machine tool. The linkage conveying device is used for supporting and carrying galvanized plates, and a material collecting conveying belt assembly is arranged at the output end of the linkage conveying device. During use, the pushing assembly utilizes the electromagnetic principle, and the electromagnetic plate is not electrified and is attracted by the permanent magnet plate during contraction; and the push rod is far away from the permanent magnet plate and close to the magnetic metal plate to push the push rod to move. Different electromagnetic plates are controlled to be powered on and powered off, and the excess materials can be selectively pushed to move downwards. Manual sorting is avoided, manpower input is reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] This invention relates to the field of duct processing, and in particular to a high-precision digital cutting and processing equipment for prefabricated ducts. Background Technology

[0002] Air ducts are piping systems used for air transport and distribution, typically made of galvanized steel, stainless steel, fiberglass, or flexible materials. They connect fans, air conditioning equipment, and terminal air vents to form a closed passage, achieving ventilation, air exchange, temperature control, or smoke extraction functions. The air duct manufacturing process includes design and drafting, sheet metal cutting, edge pressing and forming, welding and assembly, specification inspection, and surface treatment.

[0003] Ductwork sheet metal cutting primarily utilizes CNC laser cutting machines or plasma cutting machines. During operation, the galvanized sheet is placed on the cutting platform. The cutting path and dimensional parameters are programmed, and the equipment automatically and precisely cuts along the trajectory, forming finished materials and scraps of the desired shape. During cutting, the laser or plasma beam melts the sheet metal at high temperatures, while auxiliary gas removes slag, ensuring a smooth, burr-free cut. After cutting, the quality is manually inspected. Finished materials are then sorted and stacked according to specifications for subsequent ductwork assembly; scraps are collected in a waste bin for remelting or low-precision processing, achieving efficient material utilization and clean on-site management.

[0004] The shortcomings of the existing technical solutions are as follows: the edges of the cut galvanized sheets are sharp, and manual sorting requires inserting fingers into the gaps between the material piles, which can easily lead to cuts and poses a high safety risk. At the same time, manual sorting is inefficient, especially in batch production, where repeated bending and turning of the sheets is required, which is not only labor-intensive but may also lead to misjudgment and mixing of finished products with scraps, affecting the quality of subsequent processing. Summary of the Invention

[0005] This invention provides a high-precision digital cutting and processing equipment for prefabricated air ducts, which can solve the problems of low efficiency and easy safety accidents caused by the need for manual handling of leftover materials and finished materials after cutting galvanized sheets in the prior art.

[0006] A high-precision digital cutting and processing equipment for prefabricated air ducts includes a machine tool with a two-dimensional planar moving platform. A laser welding head is located at the output end of the two-dimensional planar moving platform. The two-dimensional planar moving platform can drive the laser welding head to perform two-dimensional planar motion above a galvanized sheet. The device also includes a linkage conveyor device mounted on the machine tool. The linkage conveyor device supports and transports the galvanized sheet. A material-carrying conveyor belt assembly is located at the output end of the linkage conveyor device, and an output conveyor belt assembly is located at the output end of the material-carrying conveyor belt assembly. A gap exists between the material-carrying conveyor belt assembly and the output conveyor belt assembly. A waste material separation mechanism is located above the gap to automatically separate the finished product from the waste material.

[0007] As a further aspect of the present invention: the waste material separation mechanism includes a crossbeam disposed on the inner side of the machine tool, and multiple sets of pushing components are fixedly disposed on the crossbeam for pushing the waste material to fall from the gap, thereby achieving the separation of finished product material and waste material. A separation guide plate is disposed on the front side of the gap, and the separation guide plate is arranged in a V-shape with a horizontal distribution for sending the waste material to the bottom of the output conveyor belt assembly.

[0008] As a further aspect of the present invention: each set of the pushing components includes a housing, one end of which is fixedly provided with a permanent magnet plate, and the other end of which is fixedly provided with a magnetic metal plate. An electromagnetic plate is slidably fitted in the middle of the housing. Before being energized, the electromagnetic plate is attracted by the permanent magnet plate. After being energized, it generates a magnetic field that is opposite to that of the permanent magnet plate, is repelled by the permanent magnet plate and attracted by the magnetic metal plate. A push rod that is slidably fitted with the magnetic metal plate is fixedly provided on the electromagnetic plate.

[0009] As a further aspect of the present invention: the machine tool is provided with a positioning roller, which is located above the feed conveyor assembly and together with the feed conveyor assembly clamps and transports the galvanized sheet.

[0010] As a further aspect of the present invention: the bottom of the machine tool is provided with an automatic waste material recycling mechanism for automatically recycling waste material.

[0011] As a further aspect of the present invention: the automatic waste material recycling mechanism includes a support frame, an electric receiving slide rail is provided on the inner side of the support frame, a receiving slide seat is provided on the electric receiving slide rail, and a receiving box is detachably provided on the receiving slide seat.

[0012] As a further embodiment of the present invention: the linkage transmission device includes a transmission gearbox fixedly mounted on the machine tool, and multiple sets of parallel transmission shafts are provided at the output end of the inner side of the transmission gearbox. The transmission gearbox can drive the multiple sets of transmission shafts to rotate at the same speed. Multiple sets of support plates are fixedly mounted at equal intervals on the side of each set of transmission shafts. The support plates are used to support and transport the galvanized sheet.

[0013] As a further aspect of the present invention: the transmission gearbox includes multiple sets of main wheels rotatably arranged at equal intervals inside the transmission gearbox. Each set of main wheels is coaxially and fixedly connected to a corresponding transmission shaft. The main wheels are paired, and a first transmission belt is provided on each pair of corresponding sets of main wheels. A side wheel is coaxially and fixedly provided on one side of each set of main wheels. The side wheels are paired, and a second transmission belt is provided on each pair of corresponding sets of side wheels. The first transmission belt and the second transmission belt are staggered.

[0014] As a further aspect of the present invention, the surface of the support disk is coated with a ceramic coating.

[0015] As a further aspect of the present invention: a connecting plate is fixedly installed inside the machine tool, the connecting plate is located below the linkage conveying device, and a welding slag collection pad is laid on the connecting plate.

[0016] The beneficial effects of this invention are: 1. In use, this invention utilizes electromagnetic principles to drive the component. When retracting, the electromagnetic plate is de-energized and attracted by the permanent magnet plate; when extending, it is energized to generate a reverse magnetic field, moving away from the permanent magnet plate and closer to the magnetic metal plate, thus driving the push rod. By controlling the energization and de-energization of different electromagnetic plates, residual material can be selectively pushed downwards. Combined with the V-shaped separation guide plate, the residual material is delivered to the bottom of the output conveyor belt, allowing the finished product to be output normally. This avoids manual sorting, reduces manpower input, and lowers safety hazards.

[0017] 2. In use, the electric receiving slide rail drives the receiving slide block synchronously with the galvanized sheet. The front end of the surplus material moves forward under the action of the conveyor belt assembly, falls into the receiving box, and then the receiving box moves with the surplus material, allowing it to be directly laid within it. Once full, it is transported away by forklift, making the operation convenient and quick. This mechanism solves the problem of surplus material recycling, avoids the accumulation of surplus material affecting the production environment, and reduces manual cleaning costs. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of a digital cutting and processing equipment for high-precision prefabricated air ducts provided by the present invention; Figure 2 A top view of a digital cutting and processing equipment for high-precision prefabricated air ducts provided by the present invention; Figure 3 A schematic diagram of the longitudinal section structure of a digital cutting and processing equipment for high-precision prefabricated air ducts provided by the present invention; Figure 4 A schematic diagram of the internal structure of the transmission gearbox of a high-precision prefabricated air duct digital cutting and processing equipment provided by the present invention. Figure 5 A schematic diagram of the waste material separation mechanism of a digital cutting and processing equipment for high-precision prefabricated air ducts provided by the present invention; Figure 6 This invention provides a schematic diagram of the push component structure of a digital cutting and processing equipment for high-precision prefabricated air ducts.

[0019] Explanation of reference numerals in the attached figures: 1. Machine tool; 101. Receiving plate; 2. Two-dimensional planar moving platform; 3. Linkage conveying device; 301. Drive shaft; 302. Support plate; 303. Transmission gearbox; 3031. Main wheel; 3032. Side wheel; 3033. First transmission belt; 3034. Second transmission belt; 4. Material conveyor belt assembly; 5. Positioning roller; 6. Residual material separation mechanism; 601. Crossbeam; 602. Separation guide plate; 603. Pushing assembly; 6031. Housing; 6032. Permanent magnet plate; 6033. Magnetic metal plate; 6034. Electromagnetic plate; 6035. Push rod; 7. Output conveyor belt assembly; 8. Automatic residual material recycling mechanism; 801. Support frame; 802. Electric receiving slide rail; 803. Receiving slide; 804. Receiving box; 9. Laser welding head. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 6 As shown in the figure, an embodiment of the present invention provides a high-precision digital cutting and processing equipment for prefabricated air ducts, including a machine tool 1, on which a two-dimensional planar moving platform 2 is provided, and a laser welding head 9 is installed at the output end of the two-dimensional planar moving platform 2. The two-dimensional planar moving platform 2 has the ability to drive the laser welding head 9 to perform planar two-dimensional motion above the galvanized sheet, thereby completing the cutting and processing of the galvanized sheet.

[0022] As one of the innovative features of this device, it also includes a linkage conveyor 3 mounted on the machine tool 1. The linkage conveyor 3 uses a metal disc to support and transport the galvanized sheet. Since the metal disc is less susceptible to laser interference during use, it ensures safe stability. The output end of the linkage conveyor 3 is equipped with a material-carrying conveyor belt assembly 4, and the output end of the material-carrying conveyor belt assembly 4 is equipped with an output conveyor belt assembly 7. A certain gap exists between the material-carrying conveyor belt assembly 4 and the output conveyor belt assembly 7, and a waste material separation mechanism 6 is located above this gap. The main function of the waste material separation mechanism 6 is to automatically separate the finished product from the waste material. After separation, the finished product continues to move along the predetermined conveying path, while the waste material falls to the bottom of the machine tool 1. This avoids the tedious manual separation operation later, reduces manpower input, and also lowers safety hazards.

[0023] Specifically, the waste material separation mechanism 6 includes a crossbeam 601 located inside the machine tool 1. Multiple sets of pushing components 603 are fixedly mounted on the crossbeam 601. The main function of these pushing components 603 is to push the waste material through the gap, thereby separating the finished product from the waste material. A separation guide plate 602 is located at the front of the gap. The separation guide plate 602 is arranged in a transverse V-shape, and its function is to deliver the waste material to the bottom of the output conveyor belt assembly 7. Figure 5 As shown. Each set of pushing components 603 includes a housing 6031. A permanent magnet plate 6032 is fixedly disposed at one end of the housing 6031, and a magnetic metal plate 6033 is fixedly disposed at the other end. An electromagnetic plate 6034 is slidably fitted in the middle of the housing 6031. The electromagnetic plate 6034 contains intertwined coils wrapped inside, which can generate a magnetic field when energized. Before being energized, the electromagnetic plate 6034 is attracted by the permanent magnet plate 6032; after being energized, the electromagnetic plate 6034 generates a magnetic field that is opposite to that of the permanent magnet plate 6032. At this time, it is repelled by the permanent magnet plate 6032 and attracted by the magnetic metal plate 6033. A push rod 6035 is fixedly disposed on the electromagnetic plate 6034 and slidably fitted with the magnetic metal plate 6033.

[0024] When using laser cutting to cut galvanized sheet, during the intelligent drawing stage, it is necessary to ensure that the cutting lines are not aligned with the push rod 6035. This is to facilitate the subsequent separation of the finished product and the remaining material by the push rod 6035. After cutting, the galvanized sheet will be transported by the output conveyor assembly 7 to the area between the output conveyor assembly 7 and the material feeding conveyor assembly 4.

[0025] The pushing component 603 has two states: a retracted state and an extended state. In the retracted state, the coil inside the electromagnetic plate 6034 is not energized. At this time, the magnetic material on the side of the electromagnetic plate 6034 is attracted to the permanent magnet plate 6032 and moved away from the magnetic metal plate 6033. When in the extended state, the coil inside the electromagnetic plate 6034 is energized, forming a magnetic field that repels the permanent magnet plate 6032. This causes the electromagnetic plate 6034 to move away from the permanent magnet plate 6032, while simultaneously moving closer to the magnetic metal plate 6033 due to magnetic attraction, thus pushing the push rod 6035 to move. By controlling the energization and de-energization of different magnetic metal plates 6033, the extension or retraction of the push rod 6035 can be controlled, thereby selectively pushing the corresponding scrap material plate downwards. The end of the scrap material plate passes through the bottom of the separation guide plate 602, while the finished product is output normally, thus completing the separation of the scrap material and the finished product.

[0026] In another specific embodiment, as an extension of this embodiment, the residual material separation mechanism 6 can be arranged in two parallel sets, one set for pressing down the residual material and the other set for pushing up the finished material, thereby realizing the separation of residual material and finished material in front of the separation guide plate 602 and improving the stability of the effect.

[0027] The following problem may occur: because the length of the corresponding finished material is not long enough, when the finished material enters the gap, due to the gravity at the front end, the front end of the finished material will move downwards, causing the front end of the finished material to fall along the separation guide plate 602 and fall to the bottom of the machine tool 1 along with the remaining material, resulting in erroneous separation.

[0028] To address the aforementioned issues, in one specific embodiment, a positioning roller 5 is installed on the machine tool 1. The positioning roller 5 is located above the material conveyor assembly 4, and together with the material conveyor assembly 4, it clamps and transports the galvanized sheet. By pressing the rear end of the narrow finished product with the positioning roller 5, it is ensured that the front end of the finished product can pass smoothly through the gap, preventing it from falling to the bottom of the separation guide plate 602.

[0029] In another specific embodiment, the bottom of the machine tool 1 is equipped with an automatic waste material recovery mechanism 8 for automatically recovering waste material. The automatic waste material recovery mechanism 8 includes a support frame 801, an electric receiving slide rail 802 inside the support frame 801, a receiving slide block 803 fitted on the electric receiving slide rail 802, and a receiving box 804 detachably mounted on the receiving slide block 803. In use, the linkage conveyor 3 drives the galvanized sheet to move, and simultaneously the electric receiving slide rail 802 drives the receiving slide block 803 to move synchronously with the galvanized sheet. The front end of the waste material moves forward under the action of the material conveyor belt assembly 4. When the front end of the waste material falls into the receiving box 804, the receiving box 804 moves with the front end of the waste material, so that the waste material is directly laid inside the receiving box 804. After the receiving box 804 is fully loaded with waste material multiple times, it can be directly transported away by a forklift, which is convenient and quick.

[0030] In one specific embodiment, the linkage transmission device 3 includes a transmission gearbox 303 fixedly mounted on the machine tool 1, and a plurality of parallel transmission shafts 301 are fitted onto the output end of the inner side of the transmission gearbox 303. The transmission gearbox 303 includes a plurality of main wheels 3031 rotatably mounted at equal intervals inside the transmission gearbox 303, such as... Figure 4Each set of main wheels 3031 is coaxially and fixedly connected to a corresponding drive shaft 301. The main wheels 3031 are paired, with a first drive belt 3033 fitted onto each pair of corresponding sets of main wheels 3031. Each set of main wheels 3031 has a side wheel 3032 coaxially fixedly mounted on one side. The side wheels 3032 are also paired, with a second drive belt 3034 fitted onto each pair of corresponding sets of side wheels 3032. The first drive belt 3033 and the second drive belt 3034 are staggered. Multiple support plates 302 are equidistantly fixed to the side of each drive shaft 301. The main function of the support plates 302 is to support and transport the galvanized sheet. To reduce the influence of the laser on the support plates 302, the surface of the support plates 302 is coated with a ceramic coating. During use, the galvanized sheet is placed statically on a fixed position above the support plates 302, ensuring that the cutting path of the laser welding head 9 contains galvanized sheet. After cutting, the transmission gearbox 303 drives all the transmission shafts 301 to rotate, the transmission shafts 301 drive the support plate 302 to rotate, and the support plate 302 then drives the galvanized sheet to move, transporting the galvanized sheet to the feed conveyor belt assembly 4.

[0031] Both the feed conveyor assembly 4 and the output conveyor assembly 7 are ordinary conveyor belt devices, each including a drive unit and a conveyor belt, and their main function is to transport galvanized sheets. The positioning roller 5 includes a roller body mounted on the machine tool 1 and a drive unit that drives the roller body to rotate. Its function is to maintain the relative position of the residual material and the finished material, ensuring the smooth progress of the separation process.

[0032] In addition, a receiving plate 101 is fixedly installed inside the machine tool 1. The receiving plate 101 is located below the linkage conveyor 3, and a slag collection pad is laid on the receiving plate 101. The function of the slag collection pad is to collect the slag output from laser welding. The slag can be cleaned periodically, which facilitates the maintenance of the entire equipment.

[0033] Working principle: The galvanized sheet is placed statically on top of the support plate 302, ensuring that the galvanized sheet is present along the cutting path of the laser welding head 9. During the intelligent mapping stage, it is ensured that the cutting lines are not aligned with the push rod 6035 used for separating the parts, so that the push rod 6035 can smoothly push the finished product and the remaining material for separation. After the equipment is started, the two-dimensional planar moving platform 2 drives the laser welding head 9 to perform two-dimensional planar movement above the galvanized sheet. The laser welding head 9 cuts the galvanized sheet according to the preset path, completing the cutting process of the galvanized sheet.

[0034] The linkage conveyor 3 drives multiple sets of parallel transmission shafts 301 to rotate through the transmission gearbox 303. The support disks 302 on the transmission shafts 301 rotate accordingly. The support disks 302 drive the galvanized sheet to move and transport it to the feed conveyor belt assembly 4. The feed conveyor belt assembly 4 then transports the galvanized sheet to the gap between the output conveyor belt assembly 7 and the feed conveyor belt assembly 4.

[0035] The push assembly 603 has two states: retracted and extended. In the retracted state, the coil inside the electromagnetic plate 6034 is not energized, and the magnetic material on the side of the electromagnetic plate 6034 is attracted to the permanent magnet plate 6032 and moved away from the magnetic metal plate 6033. In the extended state, the coil inside the electromagnetic plate 6034 is energized, forming a magnetic field that repels the permanent magnet plate 6032. The electromagnetic plate 6034 moves away from the permanent magnet plate 6032 and closer to the magnetic metal plate 6033, thereby pushing the push rod 6035 to move. By controlling the energization and de-energization of different electromagnetic plates 6034, the extension or retraction of the push rod 6035 is controlled, selectively pushing the corresponding residual material plate downward. The end of the residual material plate passes through the bottom of the separation guide plate 602, while the finished product is output normally, realizing the separation of residual material and finished product. The separation guide plate 602 is arranged in a horizontally distributed V-shape, and its function is to send the residual material to the bottom of the output conveyor belt assembly 7. Positioning roller 5 presses down on the rear end of the finished product to ensure that the front end of the finished product passes smoothly through the gap and avoids falling to the bottom of the separation guide plate 602, thus ensuring accurate separation.

[0036] When the linkage conveyor 3 moves the galvanized sheet, the electric receiving slide rail 802 drives the receiving slide 803 to move synchronously with the galvanized sheet. The front end of the surplus material moves forward under the action of the feeding conveyor belt assembly 4. After falling into the receiving box 804, the receiving box 804 moves with the front end of the surplus material, so that the surplus material is directly laid inside the receiving box 804. After the receiving box 804 is fully loaded with multiple loads, it is transported away by forklift, which is convenient and quick.

[0037] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A high-precision prefabricated product air pipe digital cutting processing equipment, comprising a machine tool (1), a two-dimensional plane moving platform (2) is arranged on the machine tool (1), a laser welding head (9) is arranged at the output end of the two-dimensional plane moving platform (2), and the two-dimensional plane moving platform (2) can drive the laser welding head (9) to move in a two-dimensional plane above a galvanized sheet, characterized in that: a linkage conveying device (3) is further arranged on the machine tool (1), the linkage conveying device (3) is used for supporting and carrying the galvanized sheet, a material linking conveying belt assembly (4) is arranged at the output end of the linkage conveying device (3), an output conveying belt assembly (7) is arranged at the output end of the material linking conveying belt assembly (4), there is a gap between the material linking conveying belt assembly (4) and the output conveying belt assembly (7), and a surplus material separating mechanism (6) is arranged above the gap and is used for automatically separating finished product material and surplus material. The surplus material separating mechanism (6) comprises a cross beam (601) arranged on the inner side of the machine tool (1), a plurality of groups of pushing assemblies (603) are fixedly arranged on the cross beam (601) and are used for pushing the surplus material to fall from the gap, so that the finished product material and the surplus material are separated, and a separation guide plate (602) is arranged on the front side of the gap, the separation guide plate (602) is arranged in a transversely distributed V shape and is used for sending the surplus material to the bottom of the output conveying belt assembly (7).

2. A high-precision digital cutting device for prefabricated air ducts, according to claim 1, characterized in that, Each group of the pushing assemblies (603) comprises an outer shell (6031), a permanent magnet plate (6032) is fixedly arranged at one end of the outer shell (6031), a magnetic metal plate (6033) is fixedly arranged at the other end of the outer shell (6031), an electromagnetic plate (6034) is slidably arranged in the outer shell (6031), the electromagnetic plate (6034) is attracted by the permanent magnet plate (6032) before being electrified, generates a magnetic field opposite to the permanent magnet plate (6032) after being electrified, is repelled by the permanent magnet plate (6032) and is attracted by the magnetic metal plate (6033), and a push rod (6035) that is slidably matched with the magnetic metal plate (6033) is fixedly arranged on the electromagnetic plate (6034).

3. A high precision pre-finished ducts digital cutting processing equipment according to claim 2, characterized in that, A positioning roller (5) is arranged on the machine tool (1) and located above the material linking conveying belt assembly (4) to clamp and transport the galvanized sheet together with the material linking conveying belt assembly (4).

4. A high precision digitally controlled cutting apparatus for pre-finished air ducts as claimed in claim 3, characterized in that, An automatic surplus material recycling mechanism (8) for automatically recycling surplus material is arranged at the bottom of the machine tool (1).

5. A high precision digitally controlled cutting apparatus for pre-finished air ducts as claimed in claim 4, characterized in that, The surplus material recycling mechanism (8) comprises a support frame (801), an electric material receiving sliding rail (802) is arranged on the inner side of the support frame (801), a material receiving sliding seat (803) is matched and arranged on the electric material receiving sliding rail (802), and a material receiving box (804) is detachably arranged on the material receiving sliding seat (803).

6. A high precision digitally controlled cutting apparatus for pre-finished air ducts as claimed in claim 5, characterized in that, ​ 7. A high-precision digital cutting device for prefabricated air ducts, according to claim 1 or 4 or 6, characterized in that, The linkage conveying device (3) comprises a transmission gear box (303) fixedly arranged on the machine tool (1), a plurality of groups of parallel transmission shafts (301) are matched and arranged on the inner side output end of the transmission gear box (303), the transmission gear box (303) can drive the plurality of groups of transmission shafts (301) to rotate at the same speed, a plurality of groups of support discs (302) are equidistantly and fixedly arranged on the side surface of each group of transmission shafts (301), and the support discs (302) are used for supporting and transporting the galvanized sheet.

8. A high precision digitally controlled cutting apparatus for pre-finished air ducts as claimed in claim 7, characterized in that, The transmission gear box (303) comprises a plurality of groups of main wheels (3031) equidistantly arranged on the inner side of the transmission gear box (303), each group of main wheels (3031) is coaxially and fixedly connected with the corresponding transmission shaft (301), the main wheels (3031) in the group correspond to each other, first transmission belts (3033) are matched and arranged on the two groups of main wheels (3031) corresponding to each other, a side wheel (3032) is coaxially and fixedly arranged on one side of each group of main wheels (3031), the side wheels (3032) in the group correspond to each other, second transmission belts (3034) are matched and arranged on the two groups of side wheels (3032) corresponding to each other, and the first transmission belts (3033) and the second transmission belts (3034) are staggered.

9. A high precision digitally controlled cutting apparatus for pre-finished air ducts as claimed in claim 8, characterized in that, The surface of the support disc (302) is sprayed with a ceramic coating.

10. A high precision digitally controlled cutting apparatus for pre-finished air ducts as claimed in claim 9, characterized in that, The machine tool (1) is internally and fixedly provided with a connecting plate (101), the connecting plate (101) is located below the linkage conveying device (3), and a welding slag collecting cushion layer is arranged on the connecting plate (101).

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