JPS6026906Y2 - Electronic angle indexer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an angle indexing device, particularly an electronic angle indexing device suitable for use in combination with a numerical control device.

Although numerical control devices are widely used today, indexing boards that can be used in combination with these numerical control devices and that can be numerically controlled with a simple program have not been provided.

An indexing board equipped with a turntable that is rotationally driven by a pulse motor via a worm gear is, for example,
It is disclosed in Japanese Patent No. 1-11661.

However, this indexing board simply uses a pulse motor to drive the rotation and is digitally controlled, so it is not always convenient to use it in combination with a normal numerically controlled machine tool. It wasn't something.

That is, although the polar coordinate system is suitable for controlling work performed using this type of indexing board, the numerical control of this polar coordinate system is not suitable for general mechanical work.

Therefore, if an attempt is made to perform milling using this type of indexing machine, the interpolation calculation between the rotation of the indexing machine and the movement of the milling cutter becomes extremely complicated, and the NC program becomes extremely redundant.

In addition, using this type of indexing machine, even relatively simple work such as drilling a large number of holes in a workpiece on pitch circles of widely varying diameters and at different indexing angles can be performed in a professional manner. N
C equipment, and it was impossible to perform the work semi-automatically through simple manual operations.

The present invention was developed based on the above-mentioned viewpoints, and its purpose is to enable semi-automatic indexing work with extremely simple manual operations, and also to enable the widely used NC If it is attached to a machine tool and used, its NC program can be shortened and simplified.

Here, the desired angle, for example 360°, is divided by the desired division number, for example 7, and the minimum effective digit, for example, the 4th place after the decimal point is set as the minimum effective digit. an arithmetic circuit that calculates a quotient up to 51428571, for example, a memory that stores the addition/subtraction quotient divided by the arithmetic circuit, a timing pulse generator, and a timing pulse output from the timing pulse generator that is connected to its subtraction input terminal. an addition/subtraction preset counter to be input, which is cleared at the same time as the memory is cleared, leaving a predetermined value, for example 5, in a digit smaller than the predetermined minimum effective digit, and the memory is stored in response to an operation command; The addition/subtraction preset counter is provided between the addition/subtraction preset counter, which adds the quotient of 5 to the predetermined value 5, and the addition/subtraction preset counter is opened by the operation command to allow the timing pulse to pass; Among the values preset by the addition/subtraction preset counter, when a pulse corresponding to a preset value of at least the predetermined minimum effective digit is input and subtracted, and the preset value of at least the predetermined minimum effective digit reaches zero. a circuit that is closed by a signal output to the gate circuit; a pulse motor that steps in response to a timing pulse passing through the gate circuit; and a minimum setting of a predetermined minimum effective digit of the addition/subtraction preset counter by one step of the pulse motor. An object of the present invention is to provide an electronic angle indexing device including a turntable that is rotated in accordance with a unit angle.

The details of the present invention will be explained below with reference to the drawings.

The drawing is a schematic diagram showing an embodiment of the electronic angle indexing device according to the present invention.

In the figure, 1 is an arithmetic circuit, 2 is a memory, 3 is an addition/subtraction preset counter, 4 is a timing pulse generator,
5 is a bistable element, 6 is an AND circuit, 7 is an output amplifier, 8 is a fixed table 9, - turntable 1
0, guard pulse motor 11, output shaft 12, nut 1
3 and a magnetic clamp mechanism (not shown).

The arithmetic circuit 1 has a built-in division circuit and a keyboard equipped with numeric keys 0 to 9, a clear key, a division command key, an accumulation command key, and a decimal point key, and the desired angle commanded by these keys is is divided by a desired number of divisions, and the quotient is displayed in the memory 2.

Thus, in the figure, the memory 2 stores the desired angle, for example 36
Divide 00 by the desired number of divisions, for example the number of 7 equal divisions,
A quotient of 51428571 degrees from the fourth digit after the decimal point to the sixth decimal place, which is the predetermined minimum effective digit, is displayed.

Furthermore, when the addition/subtraction preset counter 3 is cleared, as shown in the figure, 5 remains in the second digit element 3-2 from the lowest, and the other digit elements 3-1 and 3-3 to 3- 8 are all zero, and the fourth digit element 3-3 after the decimal point is a predetermined minimum effective digit.

When the accumulation command key of the arithmetic circuit 1 is operated and a command pulse sent from the T output terminal of the arithmetic circuit 1 is input, the value in the memory 2 is added to the displayed value.

That is, when the above operation is performed, the display value preset to the addition/subtraction preset counter 3 becomes 51428621.
degree, and the predetermined number of minimum significant digits is six.

On the other hand, the command pulse from the T output terminal of the arithmetic circuit 1 causes the bistable element 5 to be set, so that the timing pulse output from the timing pulse generator 4 passes through the AND circuit 6 and is applied to the addition/subtraction preset counter 3. It comes to be input to the subtraction input terminal and output amplifier 7.

Therefore, the subtraction in the addition/subtraction counter 3 is performed from the digit element 3-3, which is the minimum effective digit, excluding the terminal lowest two digit elements 3-1 and 3-2, and the addition/subtraction counter 3 is performed from the minimum effective digit element 3-3. Digit element 3 that is a digit - Digit element 3 that is a significant digit of 3 or more
When all the numerical values 514286 up to -8 become zero, an output pulse is transmitted, the bistable element 5 is reset, and the timing pulse is prevented from passing through the AND circuit 6.

This also causes a not-illustrated magnetic clamping mechanism of the indexing board 8 to release the turntable 10.

Therefore, while the bistable element 5 is in the set state, timing pulses of 514286/
Step forward 14286 times.

The guarded pulse motor 11 decelerates the step of the stepping pulse motor using a gear with one pulse, and rotates its output shaft 12 by 0,0001 degrees corresponding to the minimum setting unit angle of the minimum effective digit of the addition/subtraction preset counter. Therefore, the output shaft 12 and the turntable 10 fixed to the output shaft 12 are rotated by 514,286 degrees by the above-mentioned timing pulse, and after that, the above-mentioned magnetic clamp mechanism rotates the turntable 10 again. restrain,
It is fixed to a fixed table 9.

Therefore, at this time, the display value of the addition/subtraction preset counter 3 is the preset value 514286, which is greater than or equal to the predetermined minimum effective digit.
is subtracted and becomes zero, so the number with the least significant digit is
It is 0.000021 degrees.

When the accumulation key of the arithmetic circuit 1 is operated for the same angle indexing operation from this indexing position, the displayed value remaining in the addition/subtraction preset counter 3 is 0.0000.
At 21 degrees, the quotient 5142857 stored in memory 2
The addition and subtraction preset counter 3 displays a value of 51428592 degrees by adding the value of 1 degree.

Therefore, while the digit elements of 6 digits above the predetermined effective minimum digit are subtracted by the input signal from the subtraction input terminal and become zero, a timing pulse of 514285 pulses passes this time, and the pulse The pulse motor 11 advances 4514285 times, and its output shaft 12
and rotate the turntable 10 by 514,285 degrees.

Then, the indexing operation is performed a desired number of times in the same manner, and the turntable rotation angle and its cumulative angle are calculated as follows:
The results are extremely accurate as shown in the following table.

However, the configuration of the present invention is not limited to the above embodiment.

That is, in order to simplify the explanation, Naruko's embodiment is structured so that the desired angle to be divided and the number of divisions are entered using the keyboard, and only degrees are used as the unit of angle. Input to the circuit can also be made by using NC tape etc. for numerical control, and
It is also possible to configure the system so that degrees, minutes, and seconds can be used together as units of angle, and such a configuration is recommended for practical use.

Since the present invention is constructed as described above, when using the present invention, for example, when drilling a large number of holes on the same circumference, only a simple manual setting is required, and the rest is done semi-automatically. It is possible to perform index drilling, and when used in combination with a known numerical control device, the degree of freedom in machining increases, and the optimal program can be selected according to the shape of the workpiece and the purpose of machining. It is.

To give some examples of the latter, for example, when processing or finishing the contour of a cam etc., depending on the shape of the cam etc.
If the structure is configured to alternately or synchronously perform index machining feed for a minute death to the workpiece and machining feed for a minute distance in the axial or biaxial direction to the tool, the workpiece Since the index machining feed amount and its timing can be set extremely easily, the NC program can be made extremely simple even if the machining feed amount can be changed significantly depending on the part of the cam. be.

[Brief explanation of the drawing]

The drawing is a schematic diagram showing an embodiment of the electronic angle indexing device according to the present invention. 1...Arithmetic circuit, 2...Memory, 3.
... Addition/subtraction preset counter, 4. Song/timing pulse oscillator, 7..... Output amplifier, 8.
... Index board.

Claims (1)

[Scope of utility model registration request] an arithmetic circuit that divides a desired angle by a desired number of divisions and obtains a quotient up to a digit smaller than a predetermined minimum effective digit; a memory that stores the quotient divided by the arithmetic circuit; a timing pulse oscillator; and a timing pulse oscillator. An addition/subtraction preset counter to which a timing pulse outputted by a pulse oscillator is input to its subtraction input terminal is cleared at the same time as the memory is cleared, and at that time a predetermined value remains in a digit smaller than the predetermined minimum effective digit. is provided between the addition/subtraction preset counter, which adds and presets the quotient stored in the memory to the predetermined value in response to an operation command, and the arithmetic circuit and the addition/subtraction preset counter, which is opened by the operation command. input and subtract the number of pulses corresponding to the preset value equal to or greater than the predetermined effective minimum digit among the values cumulatively preset by the addition/subtraction preset counter. A gate circuit that is closed by a signal output when a preset value of the minimum digit or more reaches zero, a pulse motor that steps in response to a timing pulse that passes through the gate circuit, and a single step of the pulse motor An electronic angle indexing device comprising: a turntable that is rotated in accordance with a minimum set unit angle of a predetermined minimum effective digit of the addition/subtraction preset counter;