CN202491175U - Back pressure roll and brush roll leveling system for scrubbing machine - Google Patents

Abstract

The utility model discloses a back pressure roller with high brushing precision, stable brushing effect, simple brushing method and high brushing efficiency. At the same time, it also provides a system and method for polishing a grinding machine. The complete brushing system of the plate grinding machine includes a frequency converter, a PLC control device, a servo control device, and a grinding brush adding and decompressing actuator. The PLC control device is used to extract the real-time output current of the frequency converter and send pulse commands to the servo The control device, the servo control device is used to receive the pulse command sent by the PLC control device, and control the brush roller to approach and contact the back pressure roller through the action of the grinding brush addition and decompression actuator, and the grinding brush addition and subtraction The pressure actuator is controlled by the servo control device to complete the pressure and pressure action of the brush roller. The frequency converter is used to drive the rotating motor that drives the brush roller to rotate. The back pressure roller includes circular rollers, A nickel layer and a corundum layer are sequentially arranged on the outer surface of the circular roller.

Description

A back pressure roller and grinding machine brushing system

technical field

The utility model relates to a back pressure roller and a complete brushing system of a grinding machine.

Background technique

After the brush roller of the grinding machine has been working for a period of time, the brush roller will not be very smooth. At this time, the brush roller needs to be leveled by the back pressure roller. The previous method is to input the whole brush plate under the brush roller for trimming Brush, the whole brush plate is made of high-hardness steel plate and coated with emery on the steel plate. Usually the process requires the flatness of the whole brush plate to be <0.2mm. Even such a high precision requirement still cannot meet the needs of some processes, and the thickness A steel plate with only 2mm and such a large area will inevitably be slightly bent or deformed during storage and use. This is a bottleneck that has plagued the grinding process of the circuit board industry for a long time. In this case, it is necessary to stop and start repeatedly, which is inconvenient to operate and wastes time.

To sum up, the prior art has the defects of low precision of brushing, unstable effect of brushing, cumbersome brushing methods and low efficiency of brushing.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a back pressure roller with high brushing precision, stable brushing effect, simple brushing method and high brushing efficiency. At the same time, a complete brushing system for a grinding machine is also provided.

The technical scheme adopted by a back pressure roller of the utility model is: the back pressure roller includes a circular roller and a carborundum layer arranged on the outer surface of the circular roller.

The circular roller is a seamless steel pipe, a nickel layer is arranged between the circular roller and the corundum layer, and the corundum layer is 400 mesh corundum.

The technical scheme adopted by the whole brushing system of the grinding machine of the utility model is: the whole brushing system of the grinding machine includes a frequency converter, a PLC control device, a servo control device, a grinding brush adding and decompressing execution device, and the PLC control The device is used to extract the real-time output current of the frequency converter and send the pulse command to the servo control device, and the servo control device is used to receive the pulse command sent by the PLC control device, and increase and reduce pressure through the grinding brush The action of the executive device controls the brush roller to approach and contact the back pressure roller. The actuator for adding and decompressing the grinding brush is controlled by the servo control device to complete the action of increasing and reducing the pressure of the brush roller. The frequency converter is used to drive A rotating motor that drives the brush roller to rotate.

Further, the PLC control device includes an analog/digital conversion device and a pulse output device, and the analog/digital conversion device is used to extract the real-time output current of the frequency converter and send a signal to the pulse output device, and the pulse output The device sends a pulse command to the servo control device, the servo control device includes a servo driver and a servo motor, the servo driver is used to receive the pulse command sent by the PLC controller, and control the servo motor to perform power output, Make the brush increasing and decreasing pressure implementing device operate.

The beneficial effects of the utility model are: since the back pressure roller of the utility model includes a circular roller and an emery layer arranged on the outer surface of the circular roller, that is, the back pressure roller is finely ground by a grinder Compared with the existing technology, the strength is much higher than that of the whole brush plate, and there is no need to consider the deformation of the whole brush plate, and the roller can ensure that the runout is less than 0.02 mm even in the rotating state. The coaxiality of the outer circle can also be guaranteed to be within 0.02 mm. Compared with the traditional whole brush plate, the comprehensive surface flatness of emery plated with emery has been improved from 0.2mm to 0.02mm, which is a level up, and the whole brush effect has been qualitatively improved. This uses a seemingly simple method to ingeniously solve the complete brush effect that the traditional full brush board cannot achieve. Moreover, the traditional full brush board requires employees to stop the machine and manually start the whole brush program, and put in the whole brush The board can complete the whole brushing function, and it takes about 10 minutes for the whole brush to be fed into production. However, the automatic brushing of the back pressure roller in the utility model does not require human operation equipment, and all functions can be automatically completed by program control. It takes about 2 minutes for the brushing once to feed and produce, so the accuracy of the brushing is high, The whole brushing effect is stable, the whole brushing method is simple and the whole brushing efficiency is high.

Description of drawings

Fig. 1 is the structural representation of the back pressure roller of the utility model;

Fig. 2 is the principle block diagram of the whole brushing system of the grinding plate machine of the present invention;

Fig. 3 is a flow chart of the whole brushing method of the present invention.

Detailed ways

As shown in Figure 1, the back pressure roller of the utility model comprises a circular roller 1, a nickel layer 2 and an emery layer 3 arranged on the outer surface of the circular roller 1 from the inside to the outside, that is, the back pressure roller can It is a cylindrical roller finely ground by a grinder, and the outer surface is coated with the emery, or from the perspective of material saving, a seamless steel pipe is used. At this time, the circular roller 1 and the emery must be connected. A nickel layer 2 is arranged between the layers 3 to prevent the round roller 1 from rusting. Compared with the prior art, the strength of the round roller 1 is much higher than that of the whole brush plate, and there is no need to consider the deformation of the whole brush plate. Moreover, even if the back pressure roller is in the rotating state, the runout can be guaranteed to be less than 0.02 mm, and the coaxiality of the outer circle can also be guaranteed to be within 0.02 mm. It has been raised to 0.02mm, which is a level up, and the overall brushing effect has been qualitatively improved. This uses a seemingly simple method to ingeniously solve the overall brushing effect that the traditional full brushing board cannot achieve. Moreover, the traditional full brushing The complete brushing of the board requires employees to stop and manually start the whole brushing program, and put in the whole brushing board to complete the whole brushing function. It takes about 10 minutes for the whole brushing once to feed the production. However, the automatic brushing of the back pressure roller in the utility model does not require human operation equipment, and all functions can be automatically completed by program control. It takes about 2 minutes for the brushing once to feed and produce, so the accuracy of the brushing is high, The effect of the whole brush is stable, the way of the whole brush is simple and the efficiency of the whole brush is high, and what the emery layer 3 selects is 400# emery, this is because the model is too small, then the effect of the whole brush is difficult to guarantee, and if the model adopted is too large If it is too large, it will cause the circuit board to be scraped when brushing.

As shown in Fig. 2, the utility model also discloses a complete brushing system of a grinding machine, the complete brushing system includes a frequency converter 4, a PLC control device 5, a servo control device 6, and a grinding brush adding and decompressing actuator 7, The PLC control device 5 is used to extract the current output by the frequency converter 4 in real time and send a pulse command to the servo control device 6, and the servo control device 6 is used to receive the pulse command sent by the PLC controller 5, And control the operation of the brushing and decompression actuator 7, so that the brush roller approaches and contacts the back pressure roller, and the brushing and decompression actuator 7 is controlled by the servo control device 6 to complete the brush roller The action of adding and decompressing, that is, the pressure between the brush roller and the back pressure roller after contact, the frequency converter 4 is used to drive the rotating motor that makes the brush roller rotate, wherein the PLC control device 5 Including an analog/digital conversion device 8 and a pulse output device 9, the analog/digital conversion device 8 is used to extract the real-time output current of the frequency converter 4 and send a signal to the pulse output device 9, and the pulse output device 9 sends The pulse command is given to the servo control device 6, and the servo control device 6 includes a servo driver 10 and a servo motor 11, and the servo driver 10 is used to receive the pulse command sent by the PLC control device 5 and control the servo motor 11 for power output to make the brush increasing and reducing actuator 7 operate.

As shown in Figure 3, described whole brushing method is to realize according to the following steps:

(1) When the input quantity of production materials reaches the set value, the equipment enters the automatic brushing program under the control of the PLC control device 5;

(2) The servo motor 11 is pressed at a high speed under the combined control of the PLC control device 5 and the servo driver 10 to a distance of 2 mm from the back pressure roller and then switched to slow pressure. When the brush roller touches After touching the back pressure roller, the servo motor 11 continues to pressurize the brush roller so that the load of the rotating motor driven by the frequency converter 4 increases, and at the same time, the analog/digital conversion device 8 is used to grind the brush roller. Real-time reading of load current;

(3) When the load current of the frequency converter 4 extracted by the PLC control device 5 is greater than 0.3A (the set current value), start timing the complete brushing time (the complete brushing time is set by the operator in advance The initial parameters are set, and usually do not need to be changed), the pulse output device 9 sends a pulse command to the servo driver 10, and the servo driver 10 commands the servo motor 11 to decompress, that is, to add and decompress through the brush The control device 7 lifts the brush roller slightly, otherwise pressurizes (the load current of the frequency converter 4 is less than 0.3A);

(4) When the brushing time reaches the set value, the PLC control device 5 commands the servo motor 11 to lift the brush roller at high speed and separate from the back pressure roller. At this time, the automatic brushing ends, and the The PLC control device 5 automatically switches the program to the normal production mode.

It should be pointed out that during the whole brushing process, the servo control device uses the control of the multi-stage speed device and the control of the PID device to control the acceleration and deceleration according to the initially set load current of the inverter as the target value. The speed control makes the voltage regulation at a higher speed when the deviation between the current and the set value is large, and the voltage regulation at a lower speed when the deviation is small (the voltage regulation speed is divided into 4 levels according to the real-time current deviation), and the PID control makes the grinding The brush can reach the set current value in a shorter time according to the real-time load current. In short, the introduction of the 4-stage speed voltage regulation control and PID control mode greatly shortens the adjustment time for the equipment to reach the set value, and further improves the overall brush. Accuracy and overall brushing efficiency.

Claims (4)

1. counter-pressure cylinder, it is characterized in that: said counter-pressure cylinder comprises circular roller (1), is arranged on the Buddha's warrior attendant layer of sand (3) on said circular roller (1) outer surface.

2. a kind of counter-pressure cylinder according to claim 1; It is characterized in that: said circular roller (1) is a seamless steel pipe; Be provided with nickel dam (2) between said circular roller (1) and the said Buddha's warrior attendant layer of sand (3), said Buddha's warrior attendant layer of sand (3) is 400 order diamond dust.

3. a Plate grinder that comprises the said a kind of counter-pressure cylinder of claim 1 is put in order the brush system; It is characterized in that: it comprises that frequency converter, PLC control device, Servocontrol device, polish-brush add the decompression actuating unit; Said PLC control device is used to extract the electric current of said frequency converter output in real time and send pulse command and give said Servocontrol device; Said Servocontrol device is used to receive the pulse command that said PLC control device sends; And the control brush roll that adds the actuating unit that reduces pressure through said polish-brush to said counter-pressure cylinder near and contact; Said polish-brush adds that the decompression actuating unit is controlled by said Servocontrol device and the plus-minus of accomplishing brush roll presses work, and said frequency converter is used to drive and drives the rotary electric machine that said brush roll rotates.

4. a kind of Plate grinder according to claim 3 is put in order the brush system; It is characterized in that: said PLC control device comprises mould/analog-to-digital conversion apparatus, pulse outputting unit; Said mould/analog-to-digital conversion apparatus is used to extract the concurrent feed signals of the real-time output current of said frequency converter and gives said pulse outputting unit; Said pulse outputting unit is sent pulse command and is given said Servocontrol device, and said Servocontrol device comprises servo-driver and servomotor, and said servo-driver is used to receive the pulse command that said PLC controller sends; And control said servomotor and carry out power output, make said polish-brush add the decompression actuating unit and move.

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