SU538344A1 - Device for the correction of equidistants - Google Patents

Description

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The equidistant correction device belongs to the area of computational controls and can be used in systems for numerical control of machine tools (CNCs) and other systems for controlling technical equipment.

A device is known that implements a method for constructing equidistants based on constructing corrected equidistants using the main linear-circular interpolator and determining corrections to the coordinates of the circular arcs using the auxiliary linear and circular interpolator l. A disadvantage of this device is its hardware complexity, due to the need to calculate the square of the tool radius (T fr.) And low speed.

There are known devices for calculating equidistants (correction devices), based on the so-called constant, large and variable frequency methods 2. However, such devices are complex, since they contain squaring blocks, subtraction blocks, comparison blocks and a switch.

The closest technical solution to this invention is a device comprising a serially connected program setting block, a circular interpolator and a linear circular interpolator & p, one of whose inputs is connected to the output of the program setting block, a clock generator, the first input of which is connected to the output of the registration block of the end of the correction; the second input to the first output of the allocation unit zero.

The presence of a block, a switch and a linear interpolator complicates the device and reduces its speed.

The aim of the invention is to simplify the device and increase its &

This goal is achieved by introducing into the proposed device a counter, the first input of which is connected to the second output of the allocation unit zero, the second to the output of the clock generator and one of the inputs of the circular interpolator, the other input is connected to the output of the allocation unit zero, and the output of the counter is connected to

the input of the registration block end of the correction.

The drawing is a block diagram of a device for correcting equidistants.

The device contains a program setting block 1, the outputs of which are connected to a linear-circular interpolator 2 and a circular interpolator 3, a clock pulse generator 4, a block for registering the end of correction 5, a selection block zero 6 and a counter 7.

The device works as follows. The information on the processing of the curves comes from the program setting block 1 to the main linear-circular interpolator 2. The coordinates of the end point of the arc are transmitted simultaneously to the interpolator 2 and 3. During the descent, the clock pulse generator 4 starts feeding the clock pulses to the circular interpolator and counter 7. In this case, circular interpolation occurs before zeroing in one of the coordinate registers, for example X, interpolator 3. This moment registers the allocation unit zero 6, which gives a signal to stop the generator 4, then a signal to reverse the counter ik 7 and at the same time signaled to zero the interpolator 3 coordinate register. Amendment D R p. from the program setting block is entered into the X register of the interpolator 3. After this, the generator 4 is turned on and circular interpolation is performed in the opposite direction until the counter 7 is reset. This time is recorded by the block 5, which stops the generator 4. The values obtained in the interpolator 3 coordinate registers projection amendments dklz-p. transferred to interpolator 2 to correct the coordinates of the original arc. Further, the corrected information goes to the executive bodies. In the proposed device, the amount of equipment is reduced compared to 0 known devices by 10-15%. At the same time, machine productivity is increased by increasing the device speed by 10-15%.

Claims (2)

1. Agursky M. S., Vulfson I. A., Ratmirov V. A. Numerical control of machine tools. Mechanical Engineering M., 1966. 2.Levin B.I. and Boy A.Yu. Ways. program preparation and interpolators for contour numerical control systems for machine tools. Mechanical Engineering, M., 197O, pp. 130-142.