JPH0957618A - Fixed dimension processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen a range where a value of fixed dimension can be set and allow to perform the setting operation easily by furnishing a fixed dimension inputting part with a means to output signals in which the value of fixed dimension varies at a specified rate of change, and furnishing a means to turn the output signal from the means so as to vary at a different rate of change. SOLUTION: An input amount changing means 8 and a characteristic changing means 7 are installed in a fixed dimension input part 4 in which the fixed dimension as the target processing dimension for the object to be processed is entered. The input amount changing means 8 is operated externally so as to set a value of fixed dimension to be entered and emits signals in which the value of fixed dimension to be set according to the operation amount input part varies at a specified rate of change. A characteristic changing means 7 changes the output signals of the means 8 so that the operation amount of the changing means 8 varies at a different rate of change from that of the value of fixed dimension. This widens a range in which the value of fixed dimension can be set, and also the setting operation can be done easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sizing apparatus for controlling a processing state by measuring a dimension of an object to be processed and comparing it with a sizing which is a target processing dimension input in advance. The present invention relates to a sizing device with an improved dimensional input section.

[0002]

2. Description of the Related Art It is practiced to measure the dimensions of a work piece being machined to improve the machining accuracy. In particular, automatic processing is performed in which a target dimension is input, processing is performed until the measured dimension of the workpiece reaches this target dimension, and when the target dimension is reached, the processing is stopped. Such a target dimension is usually referred to as a fixed dimension, and an apparatus that performs processing based on such control is referred to as a fixed dimension processing apparatus.
This word is used here as well.

In the sizing apparatus, the processing steps are
The relative speed between the processing blade such as a cutting tool and the work piece is set to a high speed to a certain extent to provide insufficient machining accuracy, but roughing can perform high-speed machining, and refinement with improved machining accuracy, which is slower than roughing, is possible. The precision machining can be performed at high speed by dividing it into polishing and spark-out, which are slower than the precision polishing but the processing accuracy is further improved.

In order to carry out the fixed-size machining, it is necessary to input the fixed-size as the target size. For sizing input, for example, the input sizing is displayed on an analog or digital meter, and the operator operates the dial connected to the potentiometer etc. to change the input sizing and I was inputting while checking the displayed fixed size. The input sizing value is held and a signal corresponding to it is output.
Compare the actual measured dimension signal during machining with this signal,
Machining is stopped with matching or predicting matching. In order to perform precision processing, it is necessary to input and set the sizing accurately, and if the sizing range that can be input is wide, it is difficult to confirm a minute amount with the meter on the full range display of the meter. was there. Therefore, a meter used for constant size input is an automatic range switching type meter, and the display magnification of the meter is increased in a range where the input value needs to be precisely adjusted. For example, instead of displaying 10V in the full range until then, 1V is displayed in the full range.

[0005]

In order to precisely input and set a fixed size, it is necessary not only to be able to accurately display the fixed size to be input, but also to precisely adjust the input value itself. is there. When inputting by operating the potentiometer,
In order to adjust the input value precisely, it is necessary that the input value changes slowly with respect to the movement of the potentiometer. That is, it is necessary that the change of the input value is small with respect to the rotation angle of the potentiometer. In order to realize such a thing, a multi-rotation potentiometer is used, or a settable range is set for each fixed value, and the range is displayed in full range. When using a multi-turn potentiometer, the change in the fixed value per revolution is small, so it is possible to make fine adjustments to the input value.However, when inputting different fixed values, it is connected to the multi-turn potentiometer. Moreover, there is a problem that the dial needs to be rotated many times and the operation becomes complicated.

Further, when a settable range is set for each sizing value and the range is displayed by a meter in the full range, there is a problem that the settable range of the sizing value becomes narrow. Therefore, it has been demanded that the sizing apparatus has a wide settable range and can be easily set. The present invention has been made in view of the above problems, and an object of the present invention is to realize a sizing apparatus in which a settable range of a sizing value is wide and setting can be easily performed.

[0007]

In order to achieve the above object, a sizing apparatus of the present invention includes a processing section for processing a workpiece, a measuring device for detecting the dimension of the workpiece, and a workpiece. Sizing input section for inputting the sizing that is the target processing dimension of the, and the automatic range switching type display device that displays the sizing input when the sizing is input to the sizing input section Comparing the dimensions of the processed workpiece with the sizing input from the sizing input section, the comparator that determines whether the dimensions of the workpiece have reached the sizing, and the output of the comparator In a sizing device having a control unit for controlling a processing state, a sizing input unit is operated from the outside so as to set a sizing value to be input, and a sizing value to be set according to an operation amount is a predetermined value Input amount changing means 8 for outputting a signal changing at a changing rate, and an operation amount in the input amount changing means 8. So as to change the change rate different from the rate of change of Teisunchi, characterized in that it comprises a characteristic converting means 7 for converting an output signal of the input quantity changing means 8.

In the sizing apparatus of the present invention, the amount of change in the sizing value with respect to the amount of change in the sizing changing means differs depending on the input sizing value. If the amount of change in the sizing value is made smaller with respect to the amount of change and is made larger in other sections, the range in which the sizing value can be set is widened and precise setting can be easily performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the structure of a sizing apparatus according to an embodiment of the present invention. In the drawings, parts having the same function are designated by the same reference numerals,
A duplicate description will be omitted. In FIG. 1, reference numeral 1 is a processing part for processing the workpiece 100, 2 is a measuring instrument for measuring the dimension of the processed portion of the workpiece 100, and 3 is a measurement signal output from the measuring instrument 2. A comparator for comparing a sizing signal indicating a sizing value, 4 is a sizing input section for inputting a sizing value, and 5 is an automatic display for displaying the sizing value being input by the sizing input section 4. A range switching type display device 6 is a control unit for controlling the processing state of the processing unit 1 according to the comparison result from the comparator 3. The sizing input section 4 is composed of an input amount changing means 8 and a characteristic converting means 7. The input amount changing means 8 is externally operated to set an input sizing value, and outputs a signal in which the sizing value set according to the operation amount changes at a predetermined change rate. The characteristic converting means 7 converts the output signal of the input amount changing means 8 so that the operation amount and the sizing value in the input amount changing means 8 change at a different change rate.

FIG. 2 is a view for explaining the constant-size machining, in which the machining time is plotted on the abscissa and the variation of the machining amount, that is, the measured value is plotted on the ordinate, showing the progress of machining. As shown,
The processing process can be divided into three stages: rough polishing, precision polishing, and spark out. In the rough polishing process, the relative speed between the cutting tool and the work piece is set to a high speed to a certain degree, and the processing accuracy is insufficient, but high speed processing is performed. Improved processing is performed, and in the spark-out process, processing is performed at a lower speed than that of Seiken, but the processing accuracy is further improved.

The switching from the rough-polishing step to the precise-polishing step is performed when the measured value reaches the sizing value a, and the switching from the precise-polishing step to the spark-out step reaches the sizing value b. The processing is stopped when the measured value reaches the sizing value c. These three sizing values a, b, c are input and held from the sizing input unit 4. When there are a plurality of sizing values, the sizing input unit 4 can hold a plurality of sizing values, and the comparator 3 is a plurality of comparators for comparing the sizing values. It has a selector that switches between sizing values that are configured or compared. However, these are not directly related to the present invention, and therefore, the description will be given here assuming that there is one sizing value for simplification of the description.

The sizing apparatus shown in FIG. 1 has the same structure as the conventional one except for the sizing input section 4, and detailed description thereof will be omitted. FIG. 3 is a diagram showing an example of the appearance of the automatic range switching type display device 4 used at the time of constant size input. Here, an analog type meter will be described, but a digital display may be used.

In FIG. 3, reference numeral 81 is a pointer of a meter, 83 is an indicator showing a range state, and 84 to 86 are dials connected to potentiometers for adjusting three input sizing values. is there. If a fine adjustment of the input value is required, rotate the potentiometer for adjustment. In response, the indicator 83
Turns off to indicate that it is a precision display, and the pointer 8
The fixed size value for which 1 is also input is shown in precision display.

FIG. 4 is a diagram showing a configuration example of the automatic range switching type display device 4. In FIG. 4, reference numeral 51 is an amplifier that amplifies the signal Vi indicating the input sizing value with a low amplification factor (10 times), and 52 amplifies the signal Vi indicating the input sizing value with a high amplification factor (100 times). The amplifier 53 is a switch for switching the signal to be displayed on the display meter according to the switching signal from the range switching switch of FIG. Switch 5 so that the output of amplifier 51 is displayed during normal display
A signal obtained by amplifying the signal Vi by a factor of 10 is displayed by switching 4 and a signal obtained by amplifying the signal Vi by a factor of 10 is displayed and an indicator is displayed so that the output of the amplifier 52 is displayed during precision display. 83 is turned on. Since a signal obtained by amplifying the signal Vi by 100 times is displayed during the precision display, the display changes greatly with respect to the change in the signal Vi as compared with the normal display, but the range that can be displayed in the full range is 1/10.

FIG. 5 is a circuit diagram showing details of the sizing input section 4 and the comparator 3. In FIG. 5, reference numeral 8
Is a potentiometer connected to a dial operated by an operator, and 42 is a driver 4 of the potentiometer 41.
2, 43 is an operational amplifier, Rs, Rf, R
1, R2 is a resistor and D is a diode. The potentiometer 8 corresponds to the input amount changing means of FIG. 1, and the operational amplifier 43, the resistors Rs, Rf, R1 and R2, and the diode D form an amplifier corresponding to the characteristic converting means 7.
Further, the sizing input unit 4 is configured by the above. 21
Is a driver for the output of the measuring device 2. The comparator 3 is a known circuit in which an operational amplifier and a resistor are combined as shown in the figure, and a description thereof will be omitted here.

By rotating the potentiometer 41, the voltage Vs changes. Here, it is assumed that the voltage Vs changes in proportion to the rotation angle of the potentiometer 41. The operational amplifier 43, the resistors Rs, Rf, R1 and R2, and the diode D form an amplifier circuit whose amplification factor changes midway.
The amplifier circuit whose amplification factor changes will be described below.

Since the non-inverting input terminal of the operational amplifier 43 is grounded, the potential of the inverting input terminal also becomes 0V. When the voltage Vx at the connection point between the resistors R1 and R2 shown by X in the figure is lower than the threshold voltage of the diode D, the diode D becomes non-conductive, and when it becomes the threshold voltage, the diode D becomes conductive. It will not rise any more. The threshold voltage of the diode D is about 0.6 V. If this is ignored, the diode D is non-conductive when the voltage Vx is 0 V or less, and is conductive when it is 0 V. Voltage Vx
The voltage Vs when the voltage becomes 0V is (R1 / R2) VB.

When the diode D is in the non-conducting state, the resistors R1 and R2 can be ignored, and the amplifier circuit has a resistor Rs.
And Rf are connected to each other, and the amplification factor is -R
f / Rs. On the other hand, when the diode D is in the conducting state, the resistor R1 is connected in parallel with the resistor Rs, and the amplification factor of the amplifier circuit is expressed by the formula (1).

[0019]

[Equation 1]

Therefore, when R1 has a resistance value of about 1/9 of Rs, the amplification factor becomes 10 times as large as -Rf / Rs. Thus, in this amplifier, if Vs is (R1 / R2) VB or less, the amplification factor is -Rf / Rs, and Vs is (R1
/ R2) If it is VB or more, the amplification factor becomes a large value expressed by the equation (1).

Therefore, as shown in FIG. 6, the sizing input portion of FIG. 5 has a characteristic that the set value Vi changes gently with respect to the rotation angle of the potentiometer 41 up to the middle, and sharply changes beyond that. Have. Therefore, it suffices to perform precise adjustment within a range where the change is gentle. In the configuration of the automatic range switching meter shown in FIG. 4, the amplification factor is simply changed according to the switching signal, but only with that, precise display with a large amplification factor can be performed only near zero. Therefore, there is a problem that precise input cannot be performed unless the sizing value is near zero. FIG. 7 shows an example in which this is solved, and it is possible to switch to precise display for any fixed value.
Shown in

In the circuit of FIG. 7, the amplifiers 51 and 52 and the switch 53 are the same as those of FIG. Reference numeral 54 is a subtraction circuit, 55 is a lower limit value comparison circuit, 56 is a potentiometer showing a lower limit value, 57 is an upper limit value comparison circuit, 58 is a potentiometer showing an upper limit value, and 59 is a lower limit value. It is an AND gate that takes the logical product of the outputs of the value comparison circuit 55 and the upper limit value comparison circuit 57.

The lower limit value comparison circuit 55 compares the signal indicating the sizing input value output from the sizing input unit 4 and the voltage of the lower limit value potentiometer 56 to determine whether the sizing input value is equal to or more than the lower limit value. Similarly, the upper limit value comparison circuit 57 is provided in the sizing input unit 4
Is compared with the voltage of the upper limit potentiometer 58, which indicates the sizing input value output by, to determine whether the sizing input value is greater than or equal to the upper limit. When the signal indicating the sizing input value is smaller than the lower limit value and larger than the upper limit value, the AND gate 59 outputs the "low (L)" level, and the switch 53 displays the output of the low-magnification amplifier 51. Switch to. When the signal indicating the sizing input value is between the lower limit value and the upper limit value, the AND gate 59 outputs the “high (H)” level,
The switch 53 is switched so that the output of the high-magnification amplifier 52 is displayed. At this time, in the high-magnification amplifier 52,
The subtraction circuit 54 calculates the lower limit potentiometer 5 from the signal Vi.
A signal obtained by subtracting the voltage of 6 is input. Therefore, in the circuit of FIG. 7, an increase from the lower limit value is displayed with a high amplification factor between the lower limit value and the upper limit value. The lower limit value and the upper limit value are set by adjusting the potentiometer according to the input sizing value. When the input sizing value is fixed, two resistors may be combined instead of the lower limit potentiometer 56 and the upper limit potentiometer 58 to generate a predetermined voltage. As described above, the automatic range switching meter of FIG. 7 can switch to the precision display for any fixed value.

As shown in FIG. 6, in the sizing input portion of FIG. 5, the input value changes gradually with respect to the rotation angle of the potentiometer 41 near zero, but the range where the change is gentle is Vs.
Is within a predetermined value or less, and a too large value cannot be input with a gradual change. Therefore, a sizing input unit in which the range that can be input with a gradual change can be arbitrarily set will be described in the second embodiment.

FIG. 8 is a circuit diagram of the sizing input section of the second embodiment. In FIG. 8, the potential VZ of the non-inverting input terminal of the operational amplifier 43 can be adjusted within the positive range. In the range where the potential Vy at the connection point Y between the resistors R3 and R4 is larger than VZ, the diode D2 becomes non-conducting. Therefore, the operation of the circuit of FIG. 8 is similar to that of the circuit of FIG. 8 and Vs is (R1 / R2). VB + VZ
If it is below, the amplification factor is −Rf / Rs and Vs is (R
If it is 1 / R2) VB + VZ or more, the amplification factor becomes a large value expressed by the equation (1). On the contrary, in the range where Vy is smaller than Vz, the diode D2 is in the conducting state and the diode D1 is in the non-conducting state, so that the resistor R3 is connected in parallel with the resistor Rs, and the amplification factor of the amplifier circuit is Number 2
It becomes like the formula.

[0026]

[Equation 2]

Therefore, if R3 has a resistance value of about 1/9 of Rs, the amplification factor becomes 10 times -Rf / Rs. Vy
Becomes VZ when Vs is equal to or less than the expression represented by the equation 3.

[0028]

(Equation 3)

As described above, in this amplifier, Vs is given by
If the value is less than or equal to the value of the equation (3), the amplification factor becomes a large value represented by the expression (2), and if it is equal to or greater than the value of the equation (3), (R1 / R2) VB
If it is below, the amplification factor is −Rf / Rs and Vs is (R
If it is 1 / R2) VB or more, the amplification factor becomes a large value expressed by the equation (1). Therefore, the sizing input section of FIG.
As shown in (1), the set value Vi changes sharply with respect to the rotation angle of the potentiometer 41 halfway, is gentle for a predetermined period of time longer than that, and abruptly changes after that. Therefore, it suffices to perform precise adjustment within a range where the change is gentle.

[0030]

As described above, according to the present invention,
In the sizing apparatus, the settable range of the sizing value is wide and the setting can be easily performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a sizing apparatus of the present invention.

FIG. 2 is a diagram illustrating a sizing process.

FIG. 3 is a diagram showing an automatic range switching type meter.

FIG. 4 is a diagram showing a configuration example of an automatic range switching type meter.

FIG. 5 is a circuit diagram showing details of a sizing input unit and a comparator according to an embodiment of the present invention.

FIG. 6 is a diagram showing characteristics of the sizing input unit of FIG.

FIG. 7 is a diagram showing a configuration example of an automatic range switching type meter in which one range switching range can be arbitrarily set.

FIG. 8 is a circuit diagram showing a sizing input unit of a second embodiment.

9 is a diagram showing the characteristics of the sizing input unit of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Processing part 2 ... Measuring device 3 ... Comparator 4 ... Sizing input part 5 ... Automatic range switching type meter 6 ... Control part 7 ... Characteristic conversion means 8 ... Input amount changing means

Claims (1)

[Claims] 1. A processing part (1) for processing a work piece, a measuring device (2) for detecting the size of the work piece, and a constant for inputting a fixed size which is a target work size of the work piece. A size input section (4), an automatic range switching type display device (5) for displaying the input size when the size is input to the size input section (4), and the measuring device (2) A comparator (3) for comparing the detected size of the work piece with a fixed size input from the fixed size input section (4) to determine whether the size of the work piece has reached a fixed size. And a control unit (6) for controlling the processing state of the processing unit (1) according to the output of the comparator (3), wherein the constant size input unit (4) inputs It is operated from the outside to set the sizing value, and the signal that changes the sizing value to be set according to the operation amount changes at a predetermined change rate is output. The input amount changing means (8) and the output signal of the input amount changing means (8) are converted so as to change at a change rate different from the change rate of the operation amount and the sizing value in the input amount changing means (8). And a characteristic converting means (7) for performing the sizing processing apparatus.