High speed, high precision belt drawing machine

Abstract

The invention discloses a high-speed, high-precision belt drawing machine, comprising a frame, two first spindles and two second spindles respectively mounted on the frame, first pulleys respectively sleeved on the two first spindles, second pulleys respectively sleeved on the two second spindles, the two first pulleys are connected by a first belt transmission, the two second pulleys are connected by a second belt transmission, and a pipe drawing channel extending along the parallel direction of the two first spindles and for metal pipes to pass through is formed between the first and second belts; a speed measuring device and a tensioning device are also mounted on the frame, the speed measuring device can measure the drawing speed of the first and second belts, so that the two belts can keep synchronous operation; the tensioning device can drive the first pulley and the second pulley located on the same side to move and position respectively along the parallel direction of the two first spindles, so as to adjust the tension of the two belts. The belt drawing machine improves the processing quality of finished pipes and the production efficiency of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of belt drawing machines, and in particular provides a high-speed and high-precision belt drawing machine. Background Art

[0002] In the non-ferrous metal pipe industry, belt drawing machines are widely used. See the attached common belt drawing machine structure. Figure 1 and 2 As shown, it mainly includes a frame 1, and two first main shafts 21 and two second main shafts 22 which are rotatably mounted on the frame 1, the two first main shafts 21 are arranged side by side transversely, and the two second main shafts 22 are also arranged side by side transversely and are respectively and correspondingly located directly below the two first main shafts 21, and a first pulley 23 (which can be defined as a first passive pulley and a first active pulley) is fixedly sleeved on each of the two first main shafts 21, and a second pulley 24 (which can be defined as a second passive pulley and a second active pulley) is fixedly sleeved on each of the two second main shafts 22, the two first pulleys 23 are connected by a first belt 25, and the two second pulleys 24 are connected by a second belt 26, and a belt extending along the parallel direction of the two first main shafts 21 is formed between the first belt 25 and the second belt 26. In addition, the frame 1 is also provided with a traction mechanism (mainly including a guide clamp 6 and a power mechanism (including a motor, a screw assembly, etc.)) for pulling the metal pipe and passing it through the pipe pulling channel, and the frame 1 is also provided with a first pushing mechanism 71 and a second pushing mechanism 72 for respectively pushing the adjacent sides of the first belt 25 and the second belt 26 together to clamp the metal pipe (the first pushing mechanism 71 includes a plurality of pushing assemblies, each of which has a pushing cylinder and a pushing roller assembly connected to the piston rod of the pushing cylinder; the second pushing mechanism 72 mainly includes a pushing motor, a lifting reducer positioned connected to the power output shaft of the pushing motor, and a pushing roller assembly positioned connected to the power output shaft of the lifting reducer), so as to realize continuous drawing production of metal pipes.

[0003] However, the existing belt drawing machine still has some shortcomings in the production process, which are as follows: ① In the existing belt drawing machine structure, when it is necessary to adjust the tension of the first belt 25 and the second belt 26, the conventional tensioning mechanism structure is: including two swing cylinders 80, and two swing arms 81 respectively connected to the two swing cylinders 80 and the first passive spindle (for the first passive pulley to be installed) and the second passive spindle (for the second passive pulley to be installed), through the telescopic movement of the two swing cylinders 80 piston rods, to drive the first passive pulley and the second passive pulley to swing, so as to adjust the tension of the first belt and the second belt. However, since the air source pressure supplied to the two swing cylinders is unstable, the tension of the first belt and the second belt cannot be effectively controlled, so that the stability of the pipe processing quality cannot be well controlled, especially when processing thin-walled pipes, the ovality of the pipe cannot be well controlled, so that the market requirements for high-quality pipes cannot be met. ② The current equipment cannot effectively control the drawing speed of the first belt and the second belt, which affects the processing quality of the finished pipe. ③ Because the metal pipe will generate heat during the drawing process, the first belt and the second belt will heat up, which will affect the production speed of the entire equipment. The maximum drawing speed of the equipment in processing is only 100M / min, and the production efficiency is not ideal. And so on.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to overcome the above defects, the present invention provides a high-speed, high-precision belt drawing machine, which has a simple and reasonable structure, which not only greatly improves the processing quality of the finished pipe, but also greatly improves the production efficiency of the equipment.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a high-speed, high-precision belt drawing machine, comprising a frame, and two first spindles and two second spindles rotatably mounted on the frame, the two first spindles are arranged side by side horizontally, the two second spindles are also arranged side by side horizontally, and are respectively and correspondingly located directly below the two first spindles, in addition, a first pulley is fixedly sleeved on each of the two first spindles, a second pulley is fixedly sleeved on each of the two second spindles, the two first pulleys are connected by a first belt transmission, and the two second pulleys are connected by a second belt transmission The first belt and the second belt are connected, and a pipe drawing channel extending along the parallel direction of the two first main axes and for the passage of metal pipes is formed between the first belt and the second belt; a speed measuring device and a tensioning device are also installed on the frame, and the speed measuring device can measure the drawing speed of the first belt and the second belt so that the first belt and the second belt can maintain synchronous operation; the tensioning device can drive a first pulley and a second pulley located on the same side to move and position respectively along the parallel direction of the two first main axes, so as to adjust the tension of the first belt and the second belt.

[0007] As a further improvement of the present invention, one of the first pulleys and one of the second pulleys located on the same side are defined as a first passive pulley and a second passive pulley, respectively, and correspondingly, the remaining another of the first pulleys and another of the second pulleys are defined as a first active pulley and a second active pulley, respectively;

[0008] The tensioning device can drive the first passive pulley and the second passive pulley to move and position along the parallel directions of the two first main shafts respectively;

[0009] In addition, the belt drawing machine also includes a PLC controller and two main drive motors for driving the first driving pulley and the second driving pulley to rotate respectively. The speed measuring device can be connected to the PLC controller by signal transmission, and the PLC controller controls the two main drive motors to work accordingly so that the first belt and the second belt can maintain synchronous operation.

[0010] As a further improvement of the present invention, the speed measuring device includes two groups of speed measuring mechanisms, each group of the speed measuring mechanisms has a guide cylinder, an axle, a speed encoder electrically connected to the PLC controller and a speed measuring wheel, wherein the two guide cylinders are respectively fixedly mounted on the frame, and support frames are also positioned and mounted on the piston rods of the two guide cylinders, the two axles are respectively rotationally mounted on the two support frames, and one shaft end of the two axles is also respectively positioned and connected to the connecting shafts of the two speed measuring encoders; the two speed measuring wheels are respectively fixedly mounted on the two axles, and the two speed measuring wheels can also be pressed against the first belt and the second belt respectively under the drive of the two guide cylinders, so that the two speed measuring wheels can respectively operate synchronously with the first belt and the second belt.

[0011] As a further improvement of the present invention, a structure that enables the tensioning device to drive the first passive pulley and the second passive pulley to move and position respectively along the parallel direction of the two first main shafts is as follows: the tensioning device includes two groups of tensioning mechanisms, each group of the tensioning mechanisms includes a servo motor, a screw assembly and a mounting seat, wherein the two servo motors are respectively fixedly mounted on the frame, each group of the screw assembly has a screw extending along the parallel direction of the two first main shafts, and a nut sleeve coaxially sleeved outside the screw and connected with the screw thread, the two screws are respectively movably mounted on the frame, and one axial end of the two screws is also respectively corresponding to the power output shafts of the two servo motors for positioning connection; the two mounting seats are also respectively movably mounted on the frame, and at the same time, the two mounting seats are also respectively corresponding to the two nut sleeves for positioning connection, that is, the two mounting seats can be respectively moved and positioned along the parallel direction of the two first main shafts;

[0012] The first main shaft matched with the first passive pulley is defined as a first passive main shaft, and the second main shaft matched with the second passive pulley is defined as a second passive main shaft, and the first passive main shaft and the second passive main shaft are respectively rotatably mounted on the two mounting seats through bearings.

[0013] As a further improvement of the present invention, two slide rails extending along the parallel directions of the two first main axes are positioned and laid on the frame, and the two mounting seats are slidably mounted on the two slide rails respectively.

[0014] As a further improvement of the present invention, a cooling device for cooling the two first pulleys and the two second pulleys is also installed on the frame.

[0015] As a further improvement of the present invention, the two first main shafts and the two second main shafts are respectively hollow structures;

[0016] The two first pulleys and the two second pulleys are also hollow structures, and each of the first pulleys is provided with a first cooling water inlet and a first hot water return port respectively connected to the inner cavity thereof, and each of the second pulleys is provided with a second cooling water inlet and a second hot water return port respectively connected to the inner cavity thereof;

[0017] The cooling device includes two groups of first cooling mechanisms for cooling the two first pulleys respectively, and two groups of second cooling mechanisms for cooling the two second pulleys respectively, wherein each group of the first cooling mechanisms has a first cooling water pipe positioned and inserted into the first main shaft along the axial direction of the first main shaft, a first rotating joint is connected to one axial end of each of the first cooling water pipes, and each of the first rotating joints is also provided with a first water inlet for cold water to enter and a first water outlet for hot water to discharge, and two first pipe joints are connected to the other axial end of each of the first cooling water pipes, and the two first pipe joints are also They are respectively connected to the first cooling water inlet and the first hot water return port through hoses; each group of the second cooling mechanisms has a second cooling water pipe positioned and inserted in the second main shaft along the axial direction of the second main shaft, and a second rotating joint is connected to one axial end of each of the second cooling water pipes, and each of the second rotating joints is also provided with a second water inlet for cold water to enter and a second water outlet for hot water to discharge, and two second pipe joints are respectively connected to the other axial end of each of the second cooling water pipes, and the two second pipe joints are also respectively connected to the second cooling water inlet and the second hot water return port through hoses.

[0018] The beneficial effects of the present invention are as follows: compared with the prior art, the high-speed and high-precision belt drawing machine of the present invention has the following advantages: ① By configuring two sets of the speed measuring mechanism to measure the drawing speed signals of the first belt and the second belt, and transmit the signals to the PLC controller, the PLC controller will control the speed of the two main drive motors to adjust accordingly, so that the drawing speeds of the first belt and the second belt are consistent, thereby ensuring the processing quality of the finished pipe. ② By configuring two sets of the tensioning mechanism, the positions of the first passive spindle (the first passive pulley) and the second passive spindle (the second passive pulley) can be effectively adjusted, and then the tension of the first belt and the second belt can be effectively controlled, which greatly improves the stability of the pipe processing quality, especially when processing thin-walled pipes, the ovality of the pipe can be effectively controlled, which well meets the market requirements for high-quality pipes. ③ By configuring the cooling device to cool the two first pulleys and the two second pulleys, the first belt and the second belt can also be cooled accordingly, so that the running speed of the equipment can be increased to 300M / min, greatly improving the production efficiency of the equipment. In conclusion, the present invention improves the structure of the belt drawing machine, which not only greatly improves the processing quality of the finished pipe, but also greatly improves the production efficiency of the equipment, and fully meets the production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the local structure of a common belt drawing machine at present in the first perspective;

[0020] Figure 2 It is a schematic diagram of the partial structure of a common belt drawing machine at present under the second viewing angle;

[0021] Figure 3 It is a partial structural schematic diagram of the high-speed and high-precision belt drawing machine of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the speed measuring mechanism of the present invention;

[0023] Figure 5 Schematic diagram of the structure when the first main shaft and the tensioning mechanism are assembled together; (the assembly relationship between the second main shaft and the tensioning mechanism is the same as the assembly relationship between the first main shaft and the tensioning mechanism)

[0024] Figure 6 It is a structural schematic diagram of the first pulley and the first cooling mechanism when they are assembled together;

[0025] Figure 7 It is a schematic structural diagram of the second pulley and the second cooling mechanism when assembled together according to the present invention.

[0026] Combined with the accompanying drawings, the following description is given:

[0027] 1——Frame 21——First spindle

[0028] 22——Second main shaft 23——First pulley

[0029] 24——Second pulley 25——First belt

[0030] 26——Second belt 230——First cooling water inlet

[0031] 231——First hot water return port 240——Second cooling water inlet

[0032] 241——Second hot water return port 3——Speed ​​measuring device

[0033] 30——Guide cylinder 31——Axle

[0034] 32——Speed ​​encoder 33——Speed ​​wheel

[0035] 34——Support frame 4——Tensioning device

[0036] 40——Servo motor 41——Lead screw

[0037] 42——Nut sleeve 43——Mounting seat

[0038] 44——slide rail 51——first cooling water pipe

[0039] 52——First rotary joint 53——First pipe joint

[0040] 54——Second cooling water pipe 55——Second rotary joint

[0041] 56——Second pipe joint 6——Guide clamp

[0042] 71——first pushing mechanism 72——second pushing mechanism

[0043] 80——Swing cylinder 81——Swing arm DETAILED DESCRIPTION

[0044] The following describes the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0045] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any structural modification, change in proportion relationship or adjustment of size, without affecting the effects and purposes that can be produced by the present invention, should still fall within the scope of the technical content disclosed by the present invention. The "first", "second", etc. described in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0046] Embodiment 1:

[0047] Please refer to the attached Figure 3 To Attachment Figure 7 The figures are respectively a partial structural schematic diagram of the high-speed, high-precision belt drawing machine of the present invention; a structural schematic diagram of the speed measuring mechanism; a structural schematic diagram when the first spindle and the tensioning mechanism are assembled together; a structural schematic diagram when the first pulley and the first cooling mechanism are assembled together; and a structural schematic diagram when the second pulley and the second cooling mechanism are assembled together.

[0048] The high-speed, high-precision belt drawing machine of the present invention comprises a frame 1, and two first spindles 21 and two second spindles 22 respectively rotatably mounted on the frame 1, the two first spindles 21 are arranged side by side in a transverse direction, the two second spindles 22 are also arranged side by side in a transverse direction, and are respectively and correspondingly located directly below the two first spindles 21, in addition, a first pulley 23 is respectively fixedly sleeved on the two first spindles 21, and a second pulley 24 is respectively fixedly sleeved on the two second spindles 22, the two first pulleys 23 are connected by a first belt 25, the two second pulleys 24 are connected by a second belt 26, and the first belt 25 and the second belt 26 are connected by a first belt 25 and a second belt 26 are connected by a second belt 26. A pipe drawing channel is also formed between the two first main shafts 21 (or the two second main shafts 22) and extends in the parallel direction for the metal pipe to pass through; in particular, a speed measuring device 3 and a tensioning device 4 are also installed on the frame 1, and the speed measuring device 3 can measure the pulling speed of the first belt 25 and the second belt 26 so that the first belt 25 and the second belt 26 can maintain synchronous operation; the tensioning device 4 can drive the first pulley 23 and the second pulley 24 located on the same side to move and position respectively along the parallel direction of the two first main shafts 21, so as to adjust the tension of the first belt 25 and the second belt 26.

[0049] In this embodiment, preferably, one of the first pulleys 23 and one of the second pulleys 24 located on the same side are defined as the first passive pulley and the second passive pulley, respectively, and correspondingly, the remaining other first pulley 23 and another second pulley 24 are defined as the first active pulley and the second active pulley, respectively;

[0050] The tensioning device 4 can drive the first passive pulley and the second passive pulley to move and position respectively along the parallel direction of the two first main shafts 21; in addition, the belt drawing machine also includes a PLC controller, and two main drive motors (not shown in the figure) for driving the first active pulley and the second active pulley to rotate respectively, and the speed measuring device 3 can be connected to the PLC controller by signal transmission, and the PLC controller controls the two main drive motors to work accordingly, so that the first belt 25 and the second belt 26 can maintain synchronous operation.

[0051] In the present embodiment, preferably, the speed measuring device 3 includes two groups of speed measuring mechanisms, each group of the speed measuring mechanisms comprises a guide cylinder 30, a wheel axle 31, a speed measuring encoder 32 electrically connected to the PLC controller (i.e., signal transmission connection) and a speed measuring wheel 33, wherein the two guide cylinders 30 are respectively fixedly mounted on the frame 1, and support frames 34 are also positioned and mounted on the piston rods of the two guide cylinders 30, respectively, the two wheel axles 31 are respectively rotatably mounted on the two support frames 34 through bearings, and one shaft end of the two wheel axles 31 is also respectively positioned and connected to the connecting shafts of the two speed measuring encoders 32; the two speed measuring wheels 33 are respectively fixedly sleeved on the two wheel axles 31, and the two speed measuring wheels 33 can also be driven by the two guide cylinders 30 to press against the first belt 25 and the second belt 26 respectively, so that the two speed measuring wheels 33 can respectively correspond to the first belt 25 and the second belt 26 to operate synchronously. That is, when the first belt 25 and the second belt 26 are pulling, the speed measuring wheel 33 matched therewith will be driven to run synchronously, and then the wheel shaft 31 and the speed measuring encoder 32 will be driven to run synchronously. At that time, the speed measuring encoder 32 will output a pulse signal and transmit the signal to the PLC controller; after the PLC controller receives the pulse signal from the two speed measuring encoders 32, it will control the speed of the two main drive motors to adjust accordingly, so that the pulling speed of the first belt 25 and the second belt 26 are consistent, thereby ensuring the processing quality of the finished pipe. In addition, it is explained that in the field of mechanical manufacturing, the PLC controller belongs to conventional control equipment, and its software program is a technical means that is easy to control for technicians in this field.

[0052] In this embodiment, preferably, the structure for realizing that the tensioning device 4 can drive the first passive pulley and the second passive pulley to move and position respectively along the parallel direction of the two first main shafts 21 is as follows: the tensioning device 4 includes two groups of tensioning mechanisms, each group of the tensioning mechanisms includes a servo motor 40, a screw assembly and a mounting seat 43, wherein the two servo motors 40 are respectively fixedly mounted on the frame 1, and each group of the screw assemblies has a trapezoidal screw 41 extending along the parallel direction of the two first main shafts 21, and a coaxial sleeve The nut sleeve 42 is arranged outside the lead screw 41 and connected with the lead screw thread. The two lead screws 41 are movably mounted on the frame 1 through bearing seats, and one shaft end of the two lead screws 41 is also correspondingly connected with the power output shafts of the two servo motors 40 through couplings; the two mounting seats 43 are also movably mounted on the frame 1, and at the same time, the two mounting seats 43 are also correspondingly connected with the two nut sleeves 42, that is, the two mounting seats 43 can be moved and positioned along the parallel direction of the two first spindles 21.

[0053] The first spindle 21 matched with the first passive pulley is defined as the first passive spindle, and the second spindle 22 matched with the second passive pulley is defined as the second passive spindle, and the first passive spindle and the second passive spindle are respectively rotatably mounted on the two mounting seats 43 through bearings. Through the two sets of the tensioning mechanisms, the positions of the first passive spindle (the first passive pulley) and the second passive spindle (the second passive pulley) can be effectively adjusted, and the tension of the first belt 25 and the second belt 26 can be effectively controlled, which greatly improves the stability of the processing quality of the pipe, especially when processing thin-walled pipes, the ovality of the pipe can be effectively controlled, which well meets the market requirements for high-quality pipes.

[0054] Further preferably, two slide rails 44 extending along the parallel directions of the two first main axes 21 are positioned and laid on the frame 1, and the two mounting seats 43 are slidably mounted on the two slide rails 44 respectively and correspondingly, which can improve the stability of the two mounting seats when moving.

[0055] In this embodiment, preferably, a cooling device for cooling the two first pulleys 23 and the two second pulleys 24 is also installed on the frame 1. The two first pulleys 23 and the two second pulleys 24 are cooled by the cooling device, and the first belt 25 and the second belt 26 can be cooled accordingly, so that the running speed of the equipment can be increased to 300 M / min, greatly improving the production efficiency of the equipment.

[0056] Further preferably, the two first main shafts 21 and the two second main shafts 22 are hollow structures respectively;

[0057] The two first pulleys 23 and the two second pulleys 24 are also hollow structures, and each of the first pulleys 23 is provided with a first cooling water inlet 230 and a first hot water return port 231 respectively connected to the inner cavity thereof, and each of the second pulleys 24 is provided with a second cooling water inlet 240 and a second hot water return port 241 respectively connected to the inner cavity thereof;

[0058] The cooling device includes two groups of first cooling mechanisms for cooling the two first pulleys 23, and two groups of second cooling mechanisms for cooling the two second pulleys 24, wherein each group of the first cooling mechanisms has a first cooling water pipe 51 positioned and inserted in the first main shaft along the axial direction of the first main shaft 21, and a first rotating joint 52 is connected to one axial end of each of the first cooling water pipes 51, and each of the first rotating joints 52 is also provided with a first water inlet for cold water to enter and a first water outlet for hot water to discharge (this is the prior art, so it will not be described in detail here), and the other axial end of each of the first cooling water pipes 51 is connected to two first pipe joints 53, and the two first pipe joints 53 are also connected through A hose is used to correspond to the first cooling water inlet 230 and the first hot water return port 231; each group of the second cooling mechanisms has a second cooling water pipe 54 positioned and inserted in the second main shaft along the axial direction of the second main shaft 22, and a second rotating joint 55 is connected to one axial end of each of the second cooling water pipes 54, and each of the second rotating joints 55 is also provided with a second water inlet for cold water to enter and a second water outlet for hot water to discharge (which is the prior art and will not be described in detail here), and two second pipe joints 56 are connected to the other axial end of each of the second cooling water pipes 54, and the two second pipe joints 56 are also respectively connected to the second cooling water inlet 240 and the second hot water return port 241 through hoses.

[0059] In summary, the high-speed, high-precision belt drawing machine of the present invention has a simple and reasonable structure, which not only greatly improves the processing quality of the finished pipe, but also greatly improves the production efficiency of the equipment.

[0060] The above description is only a preferred embodiment of the present invention, but is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A high-speed, high-precision belt drawing machine, comprising a frame (1), and two first spindles (21) and two second spindles (22) rotatably mounted on the frame (1), the two first spindles (21) being arranged side by side in a transverse manner, the two second spindles (22) being also arranged side by side in a transverse manner and being respectively and correspondingly located directly below the two first spindles (21), in addition, a first pulley (23) is fixedly sleeved on each of the two first spindles (21), and a second pulley (24) is fixedly sleeved on each of the two second spindles (22), the two first pulleys (23) are connected by a first belt (25), the two second pulleys (24) are connected by a second belt (26), and a pipe drawing channel is formed between the first belt (25) and the second belt (26) and extends along the parallel direction of the two first spindles (21) and is used for passing metal pipes; characterized in that: A speed measuring device (3) and a tensioning device (4) are also installed on the frame (1); the speed measuring device (3) is capable of measuring the pulling speed of the first belt (25) and the second belt (26) so that the first belt (25) and the second belt (26) can maintain synchronous operation; the tensioning device (4) is capable of driving a first pulley (23) and a second pulley (24) located on the same side to move and position respectively along the parallel directions of the two first main shafts (21) so as to adjust the tension of the first belt (25) and the second belt (26).

2. The high-speed, high-precision belt drawing machine according to claim 1, characterized in that: A first pulley (23) and a second pulley (24) located on the same side are defined as a first passive pulley and a second passive pulley, respectively, and correspondingly, another first pulley (23) and another second pulley (24) are defined as a first active pulley and a second active pulley, respectively; The tensioning device (4) can drive the first passive pulley and the second passive pulley to move and position along the parallel directions of the two first main shafts (21) respectively; In addition, the belt drawing machine also includes a PLC controller and two main drive motors for driving the first driving pulley and the second driving pulley to rotate respectively. The speed measuring device (3) can be connected to the PLC controller through signal transmission. The PLC controller controls the two main drive motors to work accordingly so that the first belt (25) and the second belt (26) can maintain synchronous operation.

3. The high-speed, high-precision belt drawing machine according to claim 2, characterized in that: The speed measuring device (3) comprises two groups of speed measuring mechanisms, each group of the speed measuring mechanisms comprises a guide cylinder (30), a wheel axle (31), a speed measuring encoder (32) electrically connected to the PLC controller, and a speed measuring wheel (33), wherein the two guide cylinders (30) are respectively fixedly mounted on the frame (1), and support frames (34) are respectively positioned and mounted on the piston rods of the two guide cylinders (30), the two wheel axles (31) are respectively rotatably mounted on the two support frames (34), and the two One end of each of the wheel axles (31) is also correspondingly positioned and connected to the connecting shafts of the two speed encoders (32); the two speed measuring wheels (33) are respectively fixedly sleeved on the two wheel axles (31), and the two speed measuring wheels (33) can also be driven by the two guide cylinders (30) to press against the first belt (25) and the second belt (26) respectively, so that the two speed measuring wheels (33) can respectively correspond to the first belt (25) and the second belt (26) to operate synchronously.

4. The high-speed, high-precision belt drawing machine according to claim 2, characterized in that: The structure for realizing that the tensioning device (4) can drive the first passive pulley and the second passive pulley to move and position respectively along the parallel direction of the two first main shafts (21) is as follows: the tensioning device (4) includes two sets of tensioning mechanisms, each set of the tensioning mechanisms includes a servo motor (40), a screw assembly and a mounting seat (43), wherein the two servo motors (40) are respectively fixedly mounted on the frame (1), and each set of the screw assembly has a screw (41) extending along the parallel direction of the two first main shafts (21), and a screw coaxially sleeved on the screw assembly. The nut sleeve (42) is outside the rod (41) and is threadably connected to the lead screw. The two lead screws (41) are movably mounted on the frame (1), and one axial end of the two lead screws (41) is also correspondingly positioned and connected to the power output shafts of the two servo motors (40); the two mounting seats (43) are also movably mounted on the frame (1), and at the same time, the two mounting seats (43) are also correspondingly positioned and connected to the two nut sleeves (42), that is, the two mounting seats (43) can be moved and positioned along the parallel direction of the two first main shafts (21). The first main shaft (21) matched with the first passive pulley is defined as a first passive main shaft, and the second main shaft (22) matched with the second passive pulley is defined as a second passive main shaft, and the first passive main shaft and the second passive main shaft are respectively rotatably mounted on the two mounting seats (43) via bearings.

5. The high-speed, high-precision belt drawing machine according to claim 4, characterized in that: Two slide rails (44) are also positioned and laid on the frame (1) and extend along the parallel directions of the two first main shafts (21), and the two mounting seats (43) are slidably mounted on the two slide rails (44) respectively and correspondingly.

6. The high-speed, high-precision belt drawing machine according to claim 1, characterized in that: A cooling device for cooling the two first pulleys (23) and the two second pulleys (24) is also installed on the frame (1).

7. The high-speed, high-precision belt drawing machine according to claim 6, characterized in that: The two first main shafts (21) and the two second main shafts (22) are respectively hollow structures; The two first pulleys (23) and the two second pulleys (24) are also hollow structures respectively, and each of the first pulleys (23) is also provided with a first cooling water inlet (230) and a first hot water return port (231) respectively connected to its inner cavity, and each of the second pulleys (24) is also provided with a second cooling water inlet (240) and a second hot water return port (241) respectively connected to its inner cavity; The cooling device comprises two groups of first cooling mechanisms for cooling the two first pulleys (23) respectively, and two groups of second cooling mechanisms for cooling the two second pulleys (24) respectively, wherein each group of the first cooling mechanisms comprises a first cooling water pipe (51) positioned and inserted into the first main shaft along the axial direction of the first main shaft (21), a first rotating joint (52) is connected to one axial end of each of the first cooling water pipes (51), and each of the first rotating joints (52) is also provided with a first water inlet for cold water to enter and a first water outlet for hot water to discharge, and two first pipe joints (53) are connected to the other axial end of each of the first cooling water pipes (51), and the two first pipe joints (53) are also connected to the first main shaft through hoses. to be connected to the first cooling water inlet (230) and the first hot water return port (231); each group of the second cooling mechanisms has a second cooling water pipe (54) positioned and inserted into the second main shaft along the axial direction of the second main shaft (22); a second rotating joint (55) is connected to one axial end of each second cooling water pipe (54), and each second rotating joint (55) is also provided with a second water inlet for cold water to enter and a second water outlet for hot water to discharge; two second pipe joints (56) are connected to the other axial end of each second cooling water pipe (54), and the two second pipe joints (56) are also connected to the second cooling water inlet (240) and the second hot water return port (241) through hoses.

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