CN101200074B - Method of cutting speed control of ultrasonic cutting device - Google Patents

Abstract

The invention provides a control method of the cutting speed of an ultrasonic cutting device. According to the material quality and the specification of the cut rubber compound, the cutting speed and the change of the thickness of the rubber compound are combined together, two working states and two cutting speeds of a cutting tool are chosen and controlled sequentially through the detecting signal between a proximity switch and an inducting plate of the cutting tool. Therefore, a method for adjusting the speed of the cutting tool simply is realized, the adaptive control of the speed of the cutting tool and the thickness of the rubber compound is finished approximately without preparing the device like a thickness gauge, the control method is simple and feasible, and the cost is low.

Description

Control method of cutting speed of ultrasonic cutting device

technical field

The invention relates to a method for controlling cutting speed, in particular to an ultrasonic cutting device used in rubber tire processing, and belongs to the field of automatic control. the

Background technique

At present, in the processing of rubber tires, cutting the rubber material according to the bonding process and production specifications is an essential process. Different from the previous physical shearing, the existing more advanced and widely used cutting process is to use ultrasonic cutting device. Ultrasonic cutting is to use ultrasonic high-frequency vibration to vibrate the molecular chain of the rubber material, so the cross section of the rubber material is relatively smooth, and the adhesion is better when laminating various rubber materials later. However, you need to be very careful when using an ultrasonic cutting device, because the price of the ultrasonic cutter body is relatively expensive, and the ultrasonic cutter body must not appear empty vibration and stagnation during cutting, otherwise it will easily cause damage. the

Since the cut rubber is a composite structure, the thickness of the entire cross-section is not uniform. The ultrasonic cutter is usually adjusted to have a specific amplitude frequency, and the ultrasonic cutter is vibrated by the vibration of the cutter slit. Break the molecular chain of the rubber compound. When the amount of rubber material cut per unit time is inconsistent, the following problems will occur: if the molecular chain of the rubber material has been broken and the cutting knife does not advance, the blade will vibrate empty under the condition of zero load; If the molecular chain of the material has not been cut, but the cutting knife has moved forward, the glue can only be cut off by the knife surface of the cutting knife. The above two situations will greatly damage the service life of the ultrasonic cutter, so the speed at which the cutter advances should be strictly controlled. the

In the existing actual production, a thickness gauge is generally used to measure the thickness of the rubber material to adjust the advancing speed of the cutter in real time. Although this measurement and control method is relatively accurate, the equipment cost is high, and it is not conducive to the maintenance and maintenance of the production device. overhaul. the

Contents of the invention

The control method of the cutting speed of the ultrasonic cutting device according to the present invention is to solve the above-mentioned problems and combine the cutting speed with the change of the thickness of the rubber material according to the material and specification of the rubber material to be cut. The detection signals between the boards are used to select and control the two working states of the cutter and the two cutting speeds in turn. the

The purpose of the present invention is to realize a simple method for adjusting the speed of the cutting knife, and approximately complete the adaptive control of the speed of the cutting knife and the thickness of the rubber material, without the need to equip devices such as thickness gauges, the control method is simple and easy, and the cost is low . the

The rubber material to which the ultrasonic cutting device is applied includes an inner liner and sidewall layers bonded to both sides of the inner liner. In the actual tire processing process, the material specifications and thickness of the inner liner and sidewall layers used are limited, and the difference is not large. the

Therefore, for different sidewall layers, the difference in the travel speed of the ultrasonic cutter is not large, and after experiments are conducted on several specifications of the sidewall layers, the speed control of the ultrasonic cutter can be determined. of. the

The same is true for the different lining layers. the

In order to achieve the purpose of the above invention, the control method of the cutting speed of the ultrasonic cutting device is to set six proximity detection switches in sequence on the rubber material conveying equipment along the advancing direction of the ultrasonic cutting knife, and set the ultrasonic cutting device on the ultrasonic cutting device. The sensor board for the feedback signal of the proximity detection switch;

The cutting speed control process is that when the first fixed-length detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the drive motor starts to rotate and drives the ultrasonic cutter to advance at a lower first speed;

When the second proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutter advances to the side end of the sidewall layer, and at this time the ultrasonic cutter starts to vibrate, and the ultrasonic cutter starts to cut the rubber material. When the ultrasonic cutter keeps moving forward at a lower second speed;

When the third proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutting knife advances to the joint between the sidewall layer and the inner liner, and the ultrasonic cutting knife is still vibrating and kept at a relatively high position. high third speed forward;

When the fourth proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutter advances to the joint between the sidewall layer and the other side of the inner liner, and the ultrasonic cutter is still vibrating at this time. Resume and maintain forward speed at the lower second speed;

When the fifth proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutting knife advances to the other side of the sidewall layer, at this time, the ultrasonic cutting knife stops vibrating, stops the cutting action, resumes and Keep going at a lower first speed;

When the sixth stop detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutter advances to the other side of the sidewall layer, the drive motor stops rotating, and the ultrasonic cutter stops advancing;

The ultrasonic cutter returns to the initial position driven by the drive motor, waiting for the start of the next cutting process. the

As in the cutting speed control method of the above-mentioned scheme, since the sidewall layer is thicker than the inner liner layer, the advancing speed of the cutting knife is not the same when cutting the sidewall layer and the inner liner layer, and the third speed for cutting the inner liner layer higher. the

Between the first fixed-length detection switch and the second proximity detection switch, and between the fifth proximity detection switch and the sixth stop detection switch, the ultrasonic cutter does not vibrate but only at a lower first Speed forward. In the above two intervals, it is only the fixed-length detection of the advancing distance of the ultrasonic cutter, the preparation before the vibration of the ultrasonic cutter starts, and the adjustment stage of completing this cutting process and preparing for the next cutting process. the

A further improvement is that the second to fifth proximity detection switches are shielded during the process of returning the ultrasonic cutter to the initial position;

When the first fixed-length detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the drive motor stops rotating, and the ultrasonic cutter stops at the initial position. the

In summary, the advantages of the method for controlling the cutting speed of the ultrasonic cutting device are:

1. A simple method of speed adjustment is realized, without the need for devices such as thickness gauges, the control method is simple, and the equipment cost is low. the

2. The speed is controlled by the feedback signal between the proximity detection switch and the induction plate. The control of the ultrasonic cutter is more accurate and the cutter can be better protected. the

Description of drawings

Now in conjunction with accompanying drawing, the present invention will be further described

Fig. 1 is a schematic diagram of rubber material cutting equipment applying the control method of the cutting speed of the ultrasonic cutting device;

Fig. 2 is the position schematic diagram of described sizing material and detection switch;

Fig. 3 is a block diagram of a system implementing the method. the

As shown in Figures 1 to 6, a frame 1, a transmission device 2, an ultrasonic cutting device 3, a cutter 4, a sidewall layer 5, an inner liner 6, and,

The 1st fixed-length detection switch 11, the 2nd proximity detection switch 12, the 3rd proximity detection switch 13, the 4th proximity detection switch 14, the 5th proximity detection switch 15, the 6th stop detection switch 16. the

Detailed ways

Embodiment 1, as shown in Figures 1 to 3, in the system applying the control method of the cutting speed of the ultrasonic cutting device, the host control system receives the host computer alarm and the signal fed back by the proximity detection switch to control the state of the motor , the state and forward speed of cutter 4. the

The method for controlling the cutting speed of the ultrasonic cutting device is to set six proximity detection switches sequentially along the advancing direction of the ultrasonic cutting knife 4 on the frame 1 of the rubber material cutting device, and the ultrasonic cutting device 3 is provided with The induction board provides feedback signals to the host control system through the above structure. the

The control process of cutting speed is:

When the first fixed-length detection switch 11 detects the signal fed back by the induction plate on the ultrasonic cutting device 3, the drive motor starts to rotate and drives the ultrasonic cutter 4 to advance at a lower first speed;

When the second proximity detection switch 12 detected the signal fed back by the induction plate on the ultrasonic cutting device 3, the ultrasonic cutting knife 4 advanced to the side end of the sidewall layer 5, and now the ultrasonic cutting knife 4 began to vibrate, and the ultrasonic cutting knife 4 Start to cut the rubber material, and now the ultrasonic cutter 4 keeps moving forward at a lower second speed;

When the third proximity detection switch 13 detects the signal fed back by the induction plate on the ultrasonic cutting device 3, the ultrasonic cutting knife 4 advances to the joint between the sidewall layer 5 and the inner liner 6, and the ultrasonic cutting knife 4 is still Vibrate, and keep moving forward at the higher third speed;

When the fourth proximity detection switch 14 detects the signal fed back by the induction plate on the ultrasonic cutting device 3, the ultrasonic cutting knife 4 advances to the joint between the sidewall layer 5 and the other side of the inner liner 6, and the ultrasonic Cutter 4 is still vibrating, resume and keep moving forward at the lower second speed;

When the 5th proximity detection switch 15 detects the signal fed back by the induction plate on the ultrasonic cutting device 3, the ultrasonic cutting knife 4 advances to the other side end of the sidewall layer 5, and at this moment, the ultrasonic cutting knife 4 stops vibrating and stops cutting. Cut the action, resume and keep moving forward at the lower first speed;

When the 6th stop detection switch 16 detects the signal fed back by the induction plate on the ultrasonic cutting device 3, the ultrasonic cutting knife 4 advances to the other side end of the sidewall layer 5, the driving motor stops rotating, and the ultrasonic cutting knife 4 stops advancing ;

The ultrasonic cutter 4 returns to the initial position under the drive of the drive motor. During the process of returning to the initial position, all the intermediate proximity detection switches 12, 13, 14, and 15 are shielded. When the first fixed-length detection switch 11 detects After receiving the feedback signal, the drive motor stops rotating, and the ultrasonic cutter 4 stops at the starting position. the

Claims (2)

1. A method for controlling the cutting speed of an ultrasonic cutting device, characterized in that: along the advancing direction of the ultrasonic cutting knife, 6 proximity detection switches are successively set on the rubber material conveying equipment, and the ultrasonic cutting device is provided with the same Sensing board for proximity detection switch feedback signal; The cutting speed control process is that when the first fixed-length detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the drive motor starts to rotate and drives the ultrasonic cutter to advance at a lower first speed; When the second proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutter advances to the side end of the sidewall layer, and at this time the ultrasonic cutter starts to vibrate, and the ultrasonic cutter starts to cut the rubber material. When the ultrasonic cutter keeps moving forward at a lower second speed; When the third proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutting knife advances to the joint between the sidewall layer and the inner liner, and the ultrasonic cutting knife is still vibrating and kept at a relatively high position. high third speed forward; When the fourth proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutter advances to the joint between the sidewall layer and the other side of the inner liner, and the ultrasonic cutter is still vibrating at this time. Resume and maintain forward speed at the second lower speed; When the fifth proximity detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutting knife advances to the other side of the sidewall layer, at this time, the ultrasonic cutting knife stops vibrating, stops the cutting action, resumes and Keep going at the lower first speed; When the sixth stop detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the ultrasonic cutter advances to the other end of the sidewall layer, the drive motor stops rotating, and the ultrasonic cutter stops advancing; The ultrasonic cutter returns to the initial position driven by the drive motor, waiting for the start of the next cutting process. 2. The method for controlling the cutting speed of the ultrasonic cutting device according to claim 1, characterized in that: in the process of returning the ultrasonic cutting knife to the initial position, the second proximity detection switch, the third proximity detection switch, the fourth The first proximity detection switch and the fifth proximity detection switch are shielded; When the first fixed-length detection switch detects the signal fed back by the induction plate on the ultrasonic cutting device, the drive motor stops rotating, and the ultrasonic cutter stops at the initial position. the

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