Method and system for controlling continuous feeding amount of grinding machine according to diameter of grinding wheel

Abstract

The invention relates to the field of machining equipment, in particular to a method and system for controlling the continuous feeding amount of a grinding machine according to the diameter of a grinding wheel. The continuous feeding amount of the grinding wheel is calculated according to the actual diameter of the current grinding wheel, and if the continuous feeding amount of the grinding wheel is within a set range, the feeding amount of the grinding wheel is transmitted to the feeding speed of the grinding wheel in the X-axis direction. The method has the advantages that the situation of human intervention can be reduced, the labor productivity can be improved, meanwhile, misoperation caused by operation errors in the parameter modification process of operators is reduced, the grinding efficiency of the roll grinder cannot be different due to the change of the diameter of the grinding wheel, and the grinding quality of the roll grinder is improved. The rollers can be machined more accurately, and the machining time of each roller is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing equipment, and in particular to a method and a system for controlling the continuous feed amount of a grinding machine according to a grinding wheel diameter. Background Art

[0002] During the grinding process of the CNC roll grinder, continuous feed is used to compensate for the wear of the grinding wheel and the consumption of the tool to ensure the target shape of the roll grinding and the required processing volume. In the actual use of the grinder, the programming operator sets a continuous feed value according to the material of the roll, the particle size and hardness of the grinding wheel and other indicators. After setting, during the grinding process, the grinding wheel feeds the X-axis continuously according to the set value to achieve the purpose of processing. In this process, the continuous feed amount is a constant value. In actual use, when the grinding wheel diameter is large and when the grinding wheel diameter is small, the grinding processing volume is different for the same continuous feed amount setting value. Judging from the experience of actual use, even if the setting parameters of the continuous feed amount are the same for grinding wheels of different diameters, the grinding amount is different. At present, the method adopted by domestic grinders is: in order to achieve the same grinding efficiency for different grinding wheel diameters, the operator usually judges the grinding wheel diameter based on experience and manually modifies the continuous feed amount, hoping to achieve the same grinding efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a method and system for a grinder to control the continuous feed amount according to the grinding wheel diameter. Under the premise of ensuring the normal processing of the rolling roller, the continuous feed amount of the grinding wheel is automatically optimized according to the change of the grinding wheel diameter, ensuring that the change of the rolling roller diameter has no effect on the processing efficiency of the rolling roller processing program. The implementation method is simple and easy, and the cost is low.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A method for controlling the continuous feed amount of a grinding machine according to the diameter of a grinding wheel, wherein a grating ruler 1 is used to collect the feed coordinate value of the grinding wheel along the X-axis direction, and a grating ruler 2 is used to collect the compression amount of the contact roller of an inner measuring arm. The actual diameter of the current grinding wheel can be obtained by comparing the value changes of the grating ruler 1 and the grating ruler 2 and referring to the original grinding wheel diameter, and the continuous feed amount of the grinding wheel is calculated according to the actual diameter of the current grinding wheel. If the continuous feed amount of the grinding wheel is within a set range, the grinding wheel feed amount is transmitted to the feed speed of the grinding wheel along the X-axis direction.

[0006] By comparing the numerical changes of grating scale 1 and grating scale 2 and referring to the original grinding wheel diameter, the actual diameter of the current grinding wheel can be obtained. The formula is as follows:

[0007] The actual diameter of the current grinding wheel = 2 × (the compression amount of the contact roller of the inner measuring arm – the feed coordinate value of the grinding wheel along the X-axis direction – the original diameter of the grinding wheel + the fixed value) ①

[0008] In formula ①, the fixed value represents the installation position distance of the two grating rulers.

[0009] Calculate the continuous feed of the grinding wheel according to the actual diameter of the current grinding wheel. The formula is as follows:

[0010] ContiInfeed_RCGWD=

[0011] NVAL_Auto_Ref_Conti_Infeed×(NVAL_Auto_Ref_GWDiaForConti / WheelDiameter)②

[0012] In formula ②, ContiInfeed_RCGWD represents the calculated continuous feed amount;

[0013] NVAL_Auto_Ref_Conti_Infeed indicates the continuous feed amount input manually;

[0014] NVAL_Auto_Ref_GWDiaForCont represents the reference value for calculation, and its value range is 620~1000mm;

[0015] WheelDiameter indicates the actual diameter of the current grinding wheel calculated according to formula ①;

[0016] The calculated continuous feed amount is transferred to the feed speed of the grinding wheel along the X-axis direction. The formula is as follows:

[0017] XAxis.Override

[0018] LREAL_TO_UDINT(ContiFct×(ContiInfeed_RCGWD×AutoOverride)③

[0019] In formula ③, XAxis.Override indicates the feed speed of the grinding wheel along the X-axis direction; ContiFct indicates the speed calculation correction coefficient; AutoOverride indicates the speed ratio of continuous feed; LREAL_TO_UDINT() indicates the data type conversion of the calculation result, converting integer data into floating-point data;

[0020] The actual diameter of the current grinding wheel is calculated, the manually input continuous feed amount is obtained, the continuous feed amount is recalculated according to the actual diameter of the current grinding wheel, and the new continuous feed amount is transmitted to the feed speed of the grinding wheel along the X-axis direction to realize the speed control of the grinding wheel along the X-axis direction.

[0021] The grinding machine controls the continuous feed amount according to the grinding wheel diameter. The system includes grating scale 1 and grating scale 2. The grating scale 1 is arranged on the X-axis feed mechanism, and the grating scale 2 is arranged on the inner measuring arm.

[0022] The grating ruler 1 and the grating ruler 2 are respectively connected to the analog input module of the control unit through ports.

[0023] The control unit is PLC.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] By adopting a new continuous feed rate to transmit the feed speed of the grinding wheel along the X-axis direction, human intervention can be reduced, labor productivity can be improved, and malfunctions caused by operator errors in the process of modifying parameters can be reduced. The grinding efficiency of the roll grinder will not be different due to changes in the grinding wheel diameter, and the roll can be processed more accurately, ensuring that the processing time of each roll is the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of the grinder controlling the continuous feed amount according to the grinding wheel diameter.

[0027] Figure 2 It is a structural diagram of a grinder that controls the continuous feed amount according to the grinding wheel diameter.

[0028] In the figure: 1-X axis feeding mechanism 2-grating ruler one 3-inner measuring arm 4-roller 5-grating ruler two 6-grinding wheel 7-grinding wheel protection cover. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0030] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0031] Example 1

[0032] The utilization rate of the grinder in the hot rolling production line is high. In order to ensure the grinding efficiency and the processing volume of the roller 4, experienced operators usually manually change the feed amount according to the diameter of the grinding wheel 6. If the feed amount is not changed, the processing time of rollers 4 of the same specification will be different. After correction, the feed amount value is adjusted according to the change of the grinding wheel 6 diameter to ensure that the continuous feed amount during the grinding process matches the grinding wheel 6 diameter. Figure 2A system for a grinding machine to control the continuous feed amount according to the diameter of a grinding wheel 6 includes a grating ruler 2 and a grating ruler 5. The grating ruler 2 is installed on an X-axis feeding mechanism 1, and the grating ruler 5 is installed on an inner measuring arm 3. The front end of the feeding mechanism 1 is connected to the grinding wheel 6, and the front end of the grinding wheel 6 is connected to the inner measuring arm. The grating ruler 2 and the grating ruler 5 are respectively connected to an analog input module through a port, and a PLC reads the data of the grating ruler through the port.

[0033] See Figure 1 A method for a grinder to control continuous feed amount according to the diameter of a grinding wheel 6, wherein a grating ruler 1 2 is used to collect feed coordinate values ​​of the grinding wheel 6 along the X-axis direction, and a grating ruler 2 5 is used to collect the compression amount of the contact roller 4 of the inner measuring arm 3. By comparing the value changes of the grating ruler 1 2 and the grating ruler 2 5 and referring to the original grinding wheel 6 diameter, the actual diameter of the current grinding wheel can be obtained, and the formula is as follows:

[0034] The actual diameter of the current grinding wheel = 2 × (the compression amount of the contact roller 4 of the inner measuring arm 3 – the feed coordinate value of the grinding wheel 6 along the X-axis direction – the original diameter of the grinding wheel 6 + the fixed value) ①

[0035] In formula ①, the fixed value represents the installation position distance of the two sections of the grating ruler. The fixed value only needs to be remeasured and adjusted when the grating ruler is replaced.

[0036] The continuous feed amount of grinding wheel 6 is calculated according to the actual diameter of the current grinding wheel, and the continuous feed amount setting value of grinding wheel 6 input in the operation interface is read. If the setting value is within the protection range, the continuous feed amount value is recalculated by PLC according to the diameter of grinding wheel 6 obtained by formula ①, and the continuous feed amount value is transmitted to the X-axis controller through PLC, and the continuous feed amount is realized. The formula is as follows:

[0037] ContiInfeed_RCGWD=

[0038] NVAL_Auto_Ref_Conti_Infeed×(NVAL_Auto_Ref_GWDiaForConti / WheelDiameter)②

[0039] In formula ②, ContiInfeed_RCGWD represents the calculated continuous feed amount;

[0040] NVAL_Auto_Ref_Conti_Infeed indicates the continuous feed amount input by the operator;

[0041] NVAL_Auto_Ref_GWDiaForCont represents the calculated reference value, which is 800;

[0042] WheelDiameter indicates the actual diameter of the current grinding wheel calculated according to formula ①;

[0043] The calculated continuous feed amount is transferred to the feed speed of the grinding wheel 6 along the X-axis direction, and the formula is as follows:

[0044] XAxis.Override

[0045] LREAL_TO_UDINT(ContiFct×(ContiInfeed_RCGWD×AutoOverride)③

[0046] In formula ③, XAxis.Override represents the feed speed of the grinding wheel 6 along the X-axis direction; ContiFct represents the speed calculation correction coefficient; AutoOverride represents the speed ratio of continuous feed, which is usually set to 100%; LREAL_TO_UDINT() represents the data type conversion of the calculation result, converting the integer data into floating-point data.

[0047] First, the actual diameter of the current grinding wheel is calculated, and the continuous feed amount input by the operator is obtained. The continuous feed amount is recalculated according to the actual diameter of the current grinding wheel, and the new continuous feed amount is transmitted to the X-axis control system to realize X-axis speed control.

[0048] Working process

[0049] When the roller 4 is processed, the control system PLC determines whether to measure the diameter of the grinding wheel 6. If not, the actual diameter of the current grinding wheel can be obtained by comparing the numerical changes of the grating scale 1 2 and the grating scale 2 5 and referring to the original grinding wheel 6 diameter. The actual diameter of the current grinding wheel is used to control the grinding feed amount of the roller 4.

[0050] Obtain the continuous feed value input from the operation interface, first determine whether the input data is within the control range, if so, store the value in the intermediate variable; recalculate the continuous feed value obtained through PLC calculation according to different grinding wheel 6 diameters, and output the calculation result through the PLC to control the speed of the transmission device to control the feed of the X-axis.

[0051] The feed rate coefficient ContiFct is determined by the actual grinding situation. Through actual implementation, it is found that directly calculating the change in the grinding wheel 6 diameter to adjust the feed rate can achieve the purpose of constant grinding amount and meet the demand. Therefore, the feed rate correction coefficient is set to 1 to form the final data model, namely formulas ② and ③.

[0052] The following is a parameter table used in the present invention and a parameter table used by operators based on experience.

[0053] Table 1 is a parameter table of the present invention.

[0054]

[0055] Table 2 is a table of parameters input by the operator based on experience.

[0056]

[0057] The feed amount in Table 1 is recalculated according to the grinding wheel diameter, and the PLC recalculates it according to the current grinding wheel diameter, so that the single-pass grinding amount is constant; if the operator inputs the feed amount value based on experience, due to the different grinding wheel diameters, it is necessary to frequently manually input the data, and the accuracy and timeliness of the data are difficult to guarantee. The data in Table 2 does not recalculate the feed amount according to the diameter, so the single-pass grinding amount is not constant, and the grinding time of the roller is unstable, affecting the processing efficiency.

Claims

1. A method for controlling continuous feed amount of a grinding machine according to a grinding wheel diameter, characterized in that: Grating scale 1 is used to collect the feed coordinate value of the grinding wheel along the X-axis direction, and grating scale 2 is used to collect the compression amount of the contact roller of the inner measuring arm. The actual diameter of the current grinding wheel can be obtained by comparing the value changes of grating scale 1 and grating scale 2 and referring to the original grinding wheel diameter, and the continuous feed amount of the grinding wheel is calculated according to the actual diameter of the current grinding wheel. If the continuous feed amount of the grinding wheel is within the set range, the grinding wheel feed amount is transmitted to the feed speed of the grinding wheel along the X-axis direction.

2. A method for controlling continuous feed amount of a grinding machine according to a grinding wheel diameter according to claim 1, characterized in that: By comparing the numerical changes of grating scale 1 and grating scale 2 and referring to the original grinding wheel diameter, the actual diameter of the current grinding wheel can be obtained. The formula is as follows: The actual diameter of the current grinding wheel = 2×(the compression amount of the contact roller of the inner measuring arm – the feed coordinate value of the grinding wheel along the X-axis direction – the original diameter of the grinding wheel + fixed value)① In formula ①, the fixed value represents the installation position distance of the two sections of the grating ruler.

3. The method for controlling the continuous feed amount of a grinding machine according to the grinding wheel diameter according to claim 1, characterized in that: The formula for calculating the continuous feed amount of the grinding wheel according to the actual diameter of the current grinding wheel is as follows: ContiInfeed_RCGWD= NVAL_Auto_Ref_Conti_Infeed×(NVAL_Auto_Ref_GWDiaForConti / WheelDiameter)②In formula ②, ContiInfeed_RCGWD represents the calculated continuous feed amount; NVAL_Auto_Ref_Conti_Infeed indicates the continuous feed amount input manually; NVAL_Auto_Ref_GWDiaForCont represents the reference value for calculation, and its value range is 620~1000mm; WheelDiameter indicates the actual diameter of the current grinding wheel calculated according to formula ①; The calculated continuous feed amount is transferred to the feed speed of the grinding wheel along the X-axis direction. The formula is as follows: XAxis.Override LREAL_TO_UDINT(ContiFct×(ContiInfeed_RCGWD×AutoOverride)③In formula ③, XAxis.Override indicates the feed speed of the grinding wheel along the X-axis direction; ContiFct indicates the speed calculation correction coefficient; AutoOverride indicates the speed ratio of continuous feed; LREAL_TO_UDINT() indicates converting the data type of the calculation result to convert the integer data into floating-point data; The actual diameter of the current grinding wheel is calculated, the manually input continuous feed amount is obtained, the continuous feed amount is recalculated according to the actual diameter of the current grinding wheel, and the new continuous feed amount is transmitted to the feed speed of the grinding wheel along the X-axis direction to realize the speed control of the grinding wheel along the X-axis direction.

4. A system for implementing the method of any one of claims 1 to 3, wherein the system controls the continuous feed amount according to the grinding wheel diameter, characterized in that: It comprises a grating ruler 1 and a grating ruler 2. The grating ruler 1 is arranged on an X-axis feeding mechanism, and the grating ruler 2 is arranged on an inner measuring arm.

5. The system for controlling continuous feed amount of a grinding machine according to the grinding wheel diameter according to claim 4, characterized in that: The grating ruler 1 and the grating ruler 2 are respectively connected to the analog input module of the control unit through ports.

6. The system for controlling continuous feed amount of a grinding machine according to the grinding wheel diameter according to claim 4, characterized in that: The control unit is a PLC.

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