Automatic trimming knife device for conveyor belt calender and use method of automatic trimming knife device

Abstract

The invention belongs to the technical field of conveyer belt calendering equipment, and discloses an automatic trimming knife device for a conveyer belt calender and a use method of the automatic trimming knife device. The two servo motors respectively drive the two sets of ball screws to respectively drive the cutters to move, and the cutters are aligned with the edges of the canvas; the two sets of infrared detectors are arranged on one side of the roller; the infrared detector is connected with the servo controller, and the servo controller is connected to the servo motor; the linear displacement sensor measures the moving value of the cutter. The servo motor is connected with the ball screw through a key and a coupler to transmit torque; the other end of the flange sleeve is fixed with the left mounting bracket; the two ends of the ball screw are supported and mounted in the left mounting bracket and the right mounting bracket through bearings respectively; and a nut on the ball screw is connected with a cutter. According to the device, the cutter always tracks the detection position constantly, it is guaranteed that the tracking position of the cutter is consistent with the position of the detected canvas, and therefore it is guaranteed that the edge of the cut film completely coincides with the edge of the canvas.

Description

Technical Field

[0001] The invention relates to the technical field of conveyor belt calendering equipment, and in particular to an automatic trimming knife device for a conveyor belt calender and a use method thereof. Background Art

[0002] Conveyor belts are rubber, fiber and metal composite products used in belt conveyors to carry and transport materials. They are widely used in agriculture, coal mines, mining, metallurgy, construction and transportation. Conveyor belt calender is an important equipment for producing conveyor belts. The trimming knife device is the main auxiliary device on the calender. Its main function is to cut off the excess rubber edge during the canvas gluing process to ensure that the edge of the tape is neat, which is conducive to subsequent cutting, lamination and other processes.

[0003] Before the canvas is guided out from the self-guided open rack and enters the calender for gluing, the distance is more than 20 meters. In the middle, it needs to pass through a series of guide rollers and high tension sections. If the tension on both sides of the canvas is different or there is a deviation in the parallelism of the guide rollers, the canvas will deviate when entering the calender roller gap. This requires the edge trimmer to move with the edge of the canvas to ensure that the edges of the upper and lower films cut out are neat and consistent with the edges of the canvas. In the past, the edge trimmer on the tire calender used an inclined guide rod and a counterweight hammer structure. When working, the blade was pressed to the edge of the cord by gravity, and the cord pushed the blade to move. However, the edge of the canvas on the conveyor belt is about 3 to 5 mm wide without warp, and the blade cannot be pushed by the canvas, so the canvas gluing process on the conveyor belt cannot be applied. Because the rolls of raw cloth purchased by the conveyor belt manufacturer are sometimes inconsistent in width, and there is a situation where the width is intermittent and sometimes wide and sometimes narrow, so the automatic edge trimmer needs to meet the changes in the width of the canvas during the production process.

[0004] In order to adapt to the canvas gluing process and ensure the trimming accuracy, we independently developed an automatic trimming knife device for conveyor belt calender to achieve independent control of both sides of the canvas. Summary of the invention

[0005] The purpose of the present invention is to design an automatic trimming knife device for a conveyor belt calender, so as to realize the automatic edge-finding function of the trimming knife with independent control on one side in the canvas gluing process, and ensure that the cut edge of the adhesive tape is neat.

[0006] The technical solution of the present invention is as follows: an automatic trimming knife device for a conveyor belt calender comprises a servo motor 1, a trimming knife 2, an infrared detector 3 and a linear displacement sensor 4;

[0007] Two servo motors 1 respectively drive two sets of ball screws 7 to drive the cutter 2 to move, and the cutter 2 is aligned with the edge of the canvas; two sets of infrared detectors 3 are arranged on one side of the roller; the infrared detectors are connected to the servo controller, and the servo controller is connected to the servo motor 1; the linear displacement sensor 4 measures the movement value of the cutter 2.

[0008] The servo motor 1 is connected to the ball screw 7 through a key 11 and a coupling 12 to transmit torque; one end of the flange sleeve 13 fixes the servo motor 1, and the other end fixes the left mounting bracket 6; the two ends of the ball screw 7 are supported and installed in the left mounting bracket 6 and the right mounting bracket 8 through bearings a5 respectively; the nut on the ball screw 7 is connected to the cutter 2.

[0009] The cutter 2 includes a pin 14, a distance sleeve 15, a retaining ring 16, a bearing b17, a knife 18, a bracket 19, a nut 20, and a spring pin 21; the pin 14 and the bracket 19 are connected and fixed by the nut 20 and the spring pin 21; the bearing b17 is installed on the pin 14, and the distance sleeve 15 and the retaining ring 16 are used to fix the bearing b17; the knife 18 is supported by the bearing b17; the knife 18 is two sets of disc knives, and the blade is quenched; linear bearings 9 are installed on both sides of the bracket 19 for guidance; the ends of the linear bearings 9 are fixed by bearing seats 10.

[0010] The infrared detector 3 includes a servo motor 1, a fork sensor 22, a sliding pair 23, a linear guide 24 and a bracket; the fork sensor 22 is fixed on the sliding pair 23, and the servo motor 1 drives the sliding pair 23 to move left and right along the linear guide 24; both ends of the linear guide 24 are fixed on the bracket; the fork sensor 22 sends a detection signal to the servo motor 1 that drives the cutter 2.

[0011] The distance between the infrared detector 3 and the center line of the roller is L1, and the arc length between the center line of the roller and the blade of the cutter 2 is L2. Then L1+L2 is the path that the canvas passes from the infrared detector 3 to the blade of the cutter 2. According to the working speed of the calender, the time for the canvas to travel from the detection point of the infrared detector 3 to the cutter 2 is calculated, and the servo motor 1 is delayed to ensure that the detection position of the canvas is consistent with the tracking position of the cutter 2, thereby ensuring neat cutting.

[0012] A method for using an automatic trimming knife device for a conveyor belt calender, the working process is as follows:

[0013] Measure the distance L1 between the infrared detector 3 and the center line of the roller, and the arc length L2 between the center line of the roller and the blade of the cutter 2. L1+L2 is the path that the canvas passes from the sensor to the blade. According to the working speed of the calender, calculate the time from the detection point of the infrared detector 3 to the cutter 2, and perform delay processing to ensure that the canvas detection position and the cutter tracking position are consistent, so as to ensure neat cutting.

[0014] First, set the width of the canvas, and drive the sliding pair 23 through the servo motor 1 to drive the fork sensor 22 to move to the detectable range on both sides of the canvas; when the canvas deviates from the center of the calendering production line during the calendering process, the fork sensor 22 detects the edge position of the canvas, and outputs the deviated numerical signal to the servo controller, compares the set and actual signals, and outputs an electrical signal to the servo motor 1 that drives the cutter 2 after calculation; at the same time, the servo controller receives the time signal from the detected canvas position to the cutter position, delays the start time of the servo motor 1, and allows the cutter to track the detected position at all times, ensuring that the cutter tracking position is consistent with the detected canvas position, thereby ensuring that the cut film edge completely overlaps with the canvas edge.

[0015] Beneficial effects of the present invention: The device of the present invention always allows the cutter to track the detection position, ensuring that the cutter tracking position is consistent with the detected canvas position, thereby ensuring that the cut film edge completely overlaps with the canvas edge. The automatic edge-finding function of the trimming knife in the canvas gluing process is realized, and because two sets of cutters are independently controlled, the trimming of the gluing process in which the width of the original cloth is intermittently wide or narrow during the production process is realized. It has been verified by actual use that the developed automatic trimming knife is suitable for the canvas gluing process on the conveyor belt calender, and the trimming accuracy is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1( a ) is a schematic diagram of the structure of an automatic trimming knife device for a conveyor belt calender; FIG. 1( b ) is a schematic diagram of the device in use.

[0017] Figure 2 Schematic diagram of the servo drive structure; (a) is the front view; (b) is the top view.

[0018] Figure 3 Schematic diagram of the cutter structure.

[0019] Figure 4 Schematic diagram of the infrared detector structure.

[0020] In the figure: 1-servo motor; 2-cutter; 3-infrared detector; 4-linear displacement sensor; 5-bearing a; 6-left mounting bracket; 7-ball screw; 8-right mounting bracket; 9-linear bearing; 10-support seat; 11-key; 12-coupling; 13-flange sleeve; 14-pin shaft; 15-spacer sleeve; 16-retaining ring; 17-bearing b; 18-cutter; 19-bracket; 20-nut; 21-spring pin; 22-fork sensor; 23-sliding pair; 24-linear guide. DETAILED DESCRIPTION

[0021] An automatic trimming knife device for a conveyor belt calender, as shown in FIG1 , is mainly composed of a servo motor 1 , a trimming knife 2 , an infrared detector 3 , and a linear displacement sensor 4 .

[0022] Two servo motors 17 are used to drive two sets of ball screws to drive the respective cutters 2 to move, so as to realize the functions of width adjustment and movement with the edge position of the canvas; two sets of infrared detectors 3 are used to detect the edge positions of the canvas on both sides, and the detection signals are transmitted to the servo controller, which are converted into electrical signals after processing and fed back to the servo motor 1. After receiving the signal, the servo motor 1 drives the ball screw 7 to drive the cutter 2 to move with the position of the canvas, so as to ensure that the cutters 2 on both sides are aligned with the edges of the canvas; the cutter part adopts double deep groove ball bearings to ensure that the cutter does not deflect during operation, thereby ensuring the cutting quality; a linear displacement sensor 4 is used to display the cutter movement value at all times and display it on the main operating console screen.

[0023] The servo motor drives the ball screw, which has fast response speed and stable control, ensuring the smooth operation of the cutter and sensitive cloth-finding action. Figure 2 Servo motor 1, bearing a5, left mounting bracket 6, ball screw 7, right mounting bracket 8, linear bearing 9, support seat 10, key 11, coupling 12, flange sleeve 13. Servo motor 1 and ball screw 7 are connected together through key 11 and coupling 12 to transmit torque. The left end of flange sleeve 13 fixes servo motor 1, and the right end is fixed to left mounting bracket 6. The left and right ends of ball screw 7 are supported by bearing a5, and bearing a5 is installed in left mounting bracket 6 and right mounting bracket 8. The nut on ball screw 7 is connected to Figure 3 The brackets 19 are fixed together, thereby driving Figure 3 The cutter parts move together.

[0024] The cutter 2 is made of two sets of disc knives, the blades are quenched, and two sets of deep groove ball bearings are arranged on the knife shaft to prevent the blades from deflecting during cutting and ensure the cutting quality. Figure 3 The pin shaft 14, the distance sleeve 15, the retaining ring 16, the bearing b17, the knife 18, the bracket 19, the nut 20, and the spring pin 21 are composed. The pin shaft 14 and the bracket 19 are connected and fixed by the nut 20 and the spring pin 21. The bearing b17 is installed on the pin shaft 14, and the distance sleeve 15 and the retaining ring 16 are used to fix the bearing to prevent the bearing from moving. The knife 18 is supported by the bearing.

[0025] The infrared detector 3 uses two sets of fork sensors 22, which are driven by servo motors 1 to move, track the edge position of the canvas, and send detection signals to the servo motors 1 that drive the cutter 2. Figure 4 The servo motor 1, the fork sensor 22, the sliding pair 23, and the bracket are composed. The fork sensor 22 is fixed on the sliding pair 23, and the servo motor 1 drives the sliding pair 23 to move left and right along the linear guide 24, thereby driving the fork sensor 22 to follow. The linear guide 24 is fixed on the left and right brackets.

[0026] Automatic trimmer working mode: First, measure the distance L1 between the infrared detector 3 and the center line of the roller, and the arc length L2 between the center line of the roller and the blade of the cutter 2. Then L1+L2 is the path that the canvas passes from the sensor to the blade. According to the working speed of the calender, the time from the sensor detection point to the cutter is calculated in the program, and a delay is performed in the program to ensure that the canvas detection position and the cutter tracking position are always consistent, ensuring neat cutting.

[0027] The automatic trimmer includes two sets of independently controlled trimmers. Figure 2 As shown. Figure 2 , servo motor 1 drives ball screw 7, due to Figure 3 The cutter is fixed on the ball screw and the nut (the ball screw and the nut are integrated into a set), thereby driving the cutter to move left and right. Figure 3 Cutter bracket 19 is installed on both sides Figure 2 Linear bearing 9 plays a guiding role to ensure the smooth operation of the cutter. Set the canvas width before working. Figure 4 The servo motor 1 drives the sliding pair 23, driving the fork sensor 22 to move to the range that can be detected on both sides of the canvas. When the canvas deviates from the center of the calendering line during the calendering process, Figure 4 The fork sensor 22 detects the edge position of the canvas and outputs the deviated numerical signal to the servo controller, which compares the set and actual signals and outputs an electrical signal to the servo controller after calculation. Figure 2 Servo motor 1; at the same time, the servo controller receives the time signal from the canvas position to the cutter position, delaying Figure 2 When the servo motor 1 is started, the cutter always tracks the detection position to ensure that the tracking position of the cutter is consistent with the detected canvas position, so as to ensure that the edge of the cut film completely overlaps with the edge of the canvas. The automatic edge-finding function of the edge cutter in the canvas gluing process is realized, and because two sets of cutters are independently controlled, the edge trimming of the gluing process in which the width of the original cloth is intermittently wide or narrow during the production process is realized. It has been verified in actual use that the developed automatic edge cutter is suitable for the canvas gluing process on the conveyor belt calender and ensures the trimming accuracy.

Claims

1. An automatic trimming knife device for a conveyor belt calender, characterized in that: The automatic trimming knife device for a conveyor belt calender comprises a servo motor (1), a trimming knife (2), an infrared detector (3) and a linear displacement sensor (4); Two servo motors (1) respectively drive two sets of ball screws (7) to drive the cutter (2) to move, and the cutter (2) is aligned with the edge of the canvas; two sets of infrared detectors (3) are arranged on one side of the roller; the infrared detectors are connected to the servo controller, and the servo controller is connected to the servo motor (1); the linear displacement sensor (4) measures the movement value of the cutter (2).

2. The automatic trimming knife device for a conveyor belt calender according to claim 1, characterized in that: The servo motor (1) and the ball screw (7) are connected via a key (11) and a coupling (12) to transmit torque; one end of a flange sleeve (13) fixes the servo motor (1) and the other end fixes the left mounting bracket (6); both ends of the ball screw (7) are supported and mounted in the left mounting bracket (6) and the right mounting bracket (8) via bearings a (5) respectively; and a nut on the ball screw (7) is connected to a cutter (2).

3. The automatic trimming knife device for a conveyor belt calender according to claim 1 or 2, characterized in that: The cutter (2) comprises a pin shaft (14), a distance sleeve (15), a retaining ring (16), a bearing b (17), a knife (18), a bracket (19), a nut (20), and a spring pin (21); the pin shaft (14) and the bracket (19) are connected and fixed by means of a nut (20) and a spring pin (21); the bearing b (17) is mounted on the pin shaft (14), and the distance sleeve (15) and the retaining ring (16) are used to fix the bearing b (17); the knife (18) is supported by the bearing b (17); the knife (18) is a two-group disc knife, and the blade is quenched; linear bearings (9) are mounted on both sides of the bracket (19) for guiding; the ends of the linear bearings (9) are fixed by bearing seats (10).

4. The automatic trimming knife device for a conveyor belt calender according to claim 3, characterized in that: The infrared detector (3) comprises a servo motor (1), a fork sensor (22), a sliding pair (23), a linear guide rail (24) and a bracket; the fork sensor (22) is fixed on the sliding pair (23); the servo motor (1) drives the sliding pair (23) to move left and right along the linear guide rail (24); both ends of the linear guide rail (24) are fixed on the bracket; the fork sensor (22) sends a detection signal to the servo motor (1) that drives the cutter (2).

5. The automatic trimming knife device for a conveyor belt calender according to any one of claims 1 to 4, characterized in that: The distance L1 between the infrared detector (3) and the center line of the roller, and the arc length L2 between the center line of the roller and the blade of the cutter (2), then L1+L2 is the path that the canvas passes from the infrared detector (3) to the blade of the cutter (2); according to the working speed of the calender, the time for the canvas to travel from the detection point of the infrared detector (3) to the cutter (2) is calculated, and the servo motor (1) is delayed to ensure that the detection position of the canvas is consistent with the tracking position of the cutter (2), thereby ensuring neat cutting.

6. A method for using the automatic trimming knife device for a conveyor belt calender according to any one of claims 1 to 5, characterized in that: The working process of the automatic trimming knife device for conveyor belt calender is as follows: Measure the distance L1 between the infrared detector (3) and the center line of the roller, and the arc length L2 between the center line of the roller and the blade of the cutter (2). L1+L2 is the path that the canvas passes from the sensor to the blade. According to the working speed of the calender, calculate the time from the detection point of the infrared detector (3) to the cutter (2), and perform delay processing to ensure that the canvas detection position and the cutter tracking position are consistent, so as to ensure neat cutting. First, the width of the canvas is set, and the sliding pair (23) is driven by the servo motor (1), so as to drive the fork sensor (22) to move to the range that can be detected on both sides of the canvas; when the canvas deviates from the center of the calendering production line during the calendering process, the fork sensor (22) detects the edge position of the canvas, outputs the deviation numerical signal to the servo controller, compares the set signal and the actual signal, and outputs an electrical signal to the servo motor (1) that drives the cutter (2) after calculation; at the same time, the servo controller receives the time signal from the detected canvas position to the cutter position, delays the start time of the servo motor (1), and always allows the cutter to track the detected position, ensuring that the cutter tracking position is consistent with the detected canvas position, thereby ensuring that the cut film edge completely overlaps with the canvas edge.

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