JPS5819403B2 - Spindle selection device for multi-axis machine tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spindle selection device for a multi-spindle machine tool, which can easily and arbitrarily select a combination of spindles necessary for machining a workpiece from among a large number of spindles, and can The purpose of this is to check whether or not the spindle specified is the one that was commanded, and to prevent machining errors from occurring.

In a multi-spindle machine tool having a large number of spindles, it is necessary to select a combination of spindles to be used from among the large number of spindles, depending on the machined hole pitch dimension or the number of holes to be machined in a workpiece.

However, if there are, for example, 30 main axes, there are approximately 1.2 billion combinations. The combination (calculation formula Σ nCr-) is r2 or r! (n-r)! There are so many options that it is almost impossible to select them arbitrarily.

Furthermore, even if it is possible to select it, it is extremely difficult to check whether the selected and projected spindle is the originally commanded spindle.

The present invention is intended to solve these conventional problems.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In the figure, 1 is a main shaft, 2 is a tile that supports the main shaft 1, and there are a large number of these tiles, for example, 30, and each of the main shafts 1 is provided respectively. The main shaft can be moved in and out as desired by the main shaft in/out drive device 3.

4 is a detection device for detecting the protruding main shaft 1, and has a large number of detectors 5 corresponding to each main shaft 1, each of which has two detectors 5 arranged along the vertical movement on the outer periphery of the upper part of each quill 2. A dog is installed, a pin provided on the spindle case is brought into contact with the dog, and the state of insertion and removal of the quill 2 is detected through the movement of the pin.

6 is the NC device, 7 is the NC tape, and the spindle selection pattern P
This is for selecting the main spindle 1 necessary for machining the workpiece from among them and inputting it to the NC device 6.

8 is a spindle combination device that stores the selected spindle inputted to the NC device 6;

9 is a spindle operation circuit, which includes an NC device 6 and a spindle combination device 8.
This is for issuing operation commands to each spindle in/out drive device 3 based on commands from the main shaft.

10 is a comparison circuit which compares the detection signal from the detection device 4 and the selected spindle memory from the spindle combination device 8;
This is to send a selection operation completion signal to the NC device 6 when the two match.

Next, the action will be explained.

All of the spindles 1 are coded, the spindle 1 necessary to process the work is selected from the spindle selection pattern P, and the NC tape 7 is used to issue a 15-digit command using the code of the selected spindle 1. and input it into the NC device 6.

Then, the NC device 6 converts the input command a into a BCD code b and issues the command to the spindle combination device 8.

The spindle combination device 8 changes the memory of the instructed selected spindle combination, issues a memory change completion signal C to the NC device 6, and instructs the comparison circuit 10 to write a selected spindle memo IJd.
At the same time, a command is also given to the spindle operation circuit 9.

Upon receiving the memory change completion signal C, the NC device 6 sends the selected spindle ejection command e and the non-selected spindle retraction command f to the spindle operation circuit 9.
send to

Therefore, the spindle operation circuit 9 sends an operation command g to each spindle inlet/outlet drive device 3 based on each command from the spindle combination device 8 and the NC device 6, and each spindle inlet/outlet drive device 3 operates to select the selected spindle 1. Each main shaft 1 is inserted and removed so that only the main shaft 1 protrudes.

When the selected spindle 1 protrudes, each detector 5 detects the state of insertion and removal of the spindle, and the detection device 4 generates a detection signal, which is input to the comparison circuit 10.

For this reason, the comparison circuit 10 performs a comparison check between the selected spindle memo 'Jd stored in the spindle combination device 8 and the detection signal from the detection device 10, and determines whether the ejected spindle 1
Determine whether or not it is selected.

If both the selected spindle memo IJd and the detection signal RI match, the comparator circuit 10 sends a selection operation completion signal j to the NC device 6, and the machine operation proceeds.

Further, as a result of the comparison check, if the two do not match, the comparison circuit 10 does not send the selection operation completion signal i, so the NC
Due to the action of the device 6, the machine operation is stopped at that point, thus making it possible to prevent machining errors.

When there are 30 spindles 1, the combination command can be arbitrarily selected using the following command code.

That is, two 75-digit commands are issued in succession.

[ represents a digit and is commanded by numbers from 0 to 7, and each number has the meaning of the next pattern.

Therefore, with one digit, it is possible to command all patterns for three axes, and if this number is set to 10 digits, all 30 sets of pattern commands can be commanded.

The present invention inputs a combination of spindles necessary for machining a workpiece into an NC device, stores it in a memory in the spindle combination device, and drives each spindle in and out through a spindle operation circuit according to commands from the NC device and spindle combination device. Since the device is operated, a desired combination of spindles can be easily and arbitrarily selected from among a large number of spindles by simply giving a predetermined command to the NC device.

In addition, the detection device detects the loading and unloading status of the spindle, and the comparison circuit compares the detection signal with the selected spindle memory of the spindle combination device, and when the two match, a selection operation completion signal is sent to the NC device. , it is possible to reliably check whether the actually ejected spindle is the one originally commanded, and therefore machining errors can be prevented.

[Brief explanation of the drawing]

The drawing is a block diagram showing one embodiment of the present invention. 1: Spindle, 3: Spindle in/out drive device, 4: Detector, 5: Detection device, 6: NC device, 8: Spindle combination device, 9: Spindle operation circuit, 10: Comparison circuit.

Claims (1)

[Claims] 1. An NC device that inputs the combination of spindles necessary to process a workpiece in a multi-spindle machine tool that has a large number of spindles, a spindle combination device that memorizes the combination of selected spindles input to this NC device, and an NC device. and a spindle operation circuit that sends operation commands to each spindle in/out drive device based on commands from the spindle combination device, a detection device that detects the ejected spindle, and a detection signal from this detection device and selection from the spindle combination device. Compare with the main axis memory and when the two match, N
1. A spindle selection device for a multi-axis machine tool, comprising a comparison circuit that sends a selection operation completion signal to a C device.