JPS62292315A - Wire out electric discharge - Google Patents

Abstract

PURPOSE:To enable non-contact drawing and recording and a distance between component elements to be adjusted by providing a spotlight generating-radiating means at one member side and a locus recording means for drawing and recording the locus of relative movement with the spot light at the other side moved relatively to said radiating means. CONSTITUTION:When a wire cut electric discharge machine 1 is once operated without stretching the wire 21 according to the program input previously in a NC unit attached to said machine 1, an upper wire guide unit 14 and a workpiece 25, i.e. a laser generator 31 and a photo-sensitive paper 33 move relatively to each other along a predetermined locus of electric discharge machining so that the locus of movement is accurately drawn and recorded on the photo-sensitive paper 33. The drawing and recording with desired accuracy are obtained from the diameter of laser beam matched with accuracy of electrospark machining. Here, since the laser generator 31 does not contact the photo-sensitive paper 33, no press force and frictional force act on both, so that even if both are adhesively applied to each other by a cellophane tape or press set by a magnet sheet, a distance between component elements for drawing and recording can be expanded and narrowed without affecting the accuracy in recording.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field 1 This invention relates to the improvement of a 7-cut [U processing machine].

[Prior Art] A wire-cut electrical discharge machine is usually provided with a drawing device on the machine body for performing a comparison check between a program figure and a corresponding machining trajectory. This is for the purpose of confirming the numerically controlled program figure in detail not simply by the position display of the NC device or the screen display on the CRT device, but by the final machining trajectory of the actual machine.

Generally, a workpiece processed by a wire-cut electrical discharge machine is often an extremely high value-added and important member that has undergone numerous machining and treatment steps up to the previous stage.

Therefore, in the unlikely event that a machining error occurs with this electric discharge machine, it will result in a large loss, which is why the above-mentioned detailed confirmation is carried out.

This machining trajectory has been checked for a long time, and the final output from the NC device of this electric discharge machine is a graphical display of the relative movement trajectory between the workpiece and the electrode wire accompanying the motor operation of the and remove it. Therefore, it is extremely reliable and is still in use today. The structure of this device usually consists of a flat drawing table installed on the work table side and a pen attached to an electrode wire guide member. Then, set the paper on the drawing table and draw in one color with a pen.

[Problems to be Solved by the Invention] As described above, since drawing is performed by bringing the pen into contact with the paper set on the drawing table with a predetermined pressure, the work during electrical discharge machining, the electrode wire, and the wire guide It is extremely difficult to install the device in such a way that it does not become an obstacle. In other words,
These devices can be made larger by installing a drawing table with a wide area corresponding to the operating range of this XY cross table on the side of the work table, and also installing a pen protruding from the wire guide section with an arm or the like. It turns into This is because it is meaningless to draw the relative motion trajectory of the two accurately.

In other words, the above-mentioned V1. ．． Even the slightest deflection of either the pen or the drawing table is not allowed. Therefore, in the case of a configuration in which the two are brought into contact with each other under a predetermined pressure, it is necessary that the arms, brackets, etc., including the arms and brackets, be made of high rigidity, resulting in an increase in the size of the device. If it is attached to the pen electrode wire guide section, the surface of the unprocessed workpiece is used as a drawing table, and paper is set on this to draw, the device does not need to be enlarged. However, in this case, tlil power cannot be applied during drawing, and switching between drawing and processing is troublesome.

Furthermore, depending on the arrangement of the pen side and the drawing white side, the drawn figure may be turned inside out with respect to the relative movement locus. There may be so-called mirror conversion, which is inconvenient.

The present invention was devised in view of the above-mentioned conventional problems.
The purpose of the present invention is to provide a wire-cut tIi electric processing machine that can record the drawing of the relative motion locus without contact, and can also arrange the distance between the constituent elements for this drawing recording to be freely close or far. .

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a spot light generating tJI radiation means disposed on the side of one member that moves relative to each other, and a method for using the member that moves relatively. A wire-cut tIi electrical processing machine was constructed by including a trajectory recording means disposed on the member side and drawing and recording the locus of the relative motion using the spot light emitted from the spot light generation and radiation means.

[Operation] Therefore, since the spot light generating means and the trajectory recording means are connected by an optical path, they are of course non-contact, and the machining trajectory of one electric discharge machining is maintained without any pressing force, frictional force, etc. acting between them. will be recorded. Furthermore, not only are they non-contact, but the optical path length of the former can be changed, so the distance between the two means can be freely set. Furthermore, it is also easy to bend the optical axis by interposing a mirror or the like. Therefore fill each wire cut tlI? The positions of both means can be selected most conveniently depending on the machining conditions of the Ii processing machine and the like.

[Example] Hereinafter, an example of a life-cut electric discharge machine of the present invention will be described based on the drawings.

The wire-cut electrical discharge machine 1 of the embodiment shown in FIG.
Similar to the conventional one, a column 5 is set up on a base 3 (), and an upper arm 7 and a lower arm 9 are installed above and below the column.
horizontally. The tips of the upper arm 7 and the lower arm 9 are provided facing a processing tank 11 arranged above the bed 3.

An upper wire guide device 13 and a lower wire guide device 15 are provided at the distal ends of the upper arm 7 and the lower arm 9, respectively. Each wire guide device 13 , 15 vertically guides a very fine electrode wire 21 that is continuously fed from the wire supply reel 17 to the take-up reel 942 . Note that the upper wire guide device 13 is configured to be vertically adjustable.

A workpiece support stand 23 is provided in the processing tank 11, and holds one side edge of the workpiece 25 to horizontally move the workpiece 25 in the X-axis direction and the Y-axis direction.

For this purpose, an X- and Y-axis moving section 27 that is program-controlled with an NG head (not shown) is provided on the base 3, and an
A Y-cross table 29 is attached, and the workpiece support stand 23 is further disposed on the Y-cross table 29.

Then, electrical discharge machining is performed between the workpiece 25 and the vertical portion of the '1FIi wire 21 between the upper wire guide device 13 and the lower wire guide device r1115.

Furthermore, during this electrical discharge machining, machining fluid is supplied to the gap between the wire A721 and the workpiece 25, that is, the electrical discharge machining section, by entering one or both of the upper and lower wire guide devices fi13.15. This is done from a nozzle device (not shown).

The upper wire guide device 13 and the workpiece 25 move relative to each other on a plane, and a laser oscillator 31 as a spot light generation and radiation means is installed on the upper side of the upper wire guide device 13 as one member side. Installing. The laser beam from the laser oscillator 31 is arranged so as to be emitted vertically downward.

And one node 2 which is the side of the other member that undergoes relative motion
5 is provided with a trajectory drawing means for drawing and recording the trajectory of the relative motion using a spot light, that is, a laser beam in this case. That is, the surface of the workpiece 25 is used as a drawing table, and the photosensitive paper 33 is adhered and set on this surface. Next, the wire-cut electrical discharge machine 1 is operated once without tensioning the wire 21 according to a program previously input into the NC mount (not shown) attached to this wire-cut electrical discharge machining (1).

As a result, the upper wire guide device 13 and the workpiece 25, that is, the laser oscillator 31 and the photosensitive paper 33 move relative to each other along the predetermined electric discharge machining locus, so that the locus of movement is accurately drawn and recorded on the photosensitive paper 33. φ Ru. If the diameter of the laser beam is set to a thickness that matches the accuracy of electrical discharge machining, a drawing record with the desired accuracy can be obtained. In this drawing recording, since there is no contact between the laser oscillator 31 and the photosensitive paper 33, no pressing force or frictional force acts between them.

Therefore, even if the photosensitive paper 33 is attached by a simple method such as pasting with cellophane tape or pressing and setting with a magnetic sheet, the recording accuracy will not be affected.

FIG. 2 shows another embodiment. In this case, the laser oscillator 31 is disposed on the upper surface of the column 5, and the mirror 35 is directed in the diagonal direction 451JII above the upper wire guide device 13.
is attached. This mirror 35 converts the direction of the horizontally emitted laser beam from the laser oscillator 31 vertically downward so that it reaches the photosensitive paper 33 set on the upper surface of the workpiece 25 . With this structure, the weight burden on the vertical position adjustment mechanism (not shown) provided in the upper wire guide device 13 is reduced compared to the embodiment shown in FIG. 1, which is advantageous. Note that the configuration of other parts is the same as that of the embodiment shown in FIG. 1, and a description thereof will be omitted.

FIG. 3 shows yet another embodiment. In this case, a dedicated drawing table 37 is installed horizontally on the side of the XY cross table 29 (on the left side in FIG. 3). A mirror 335 oriented obliquely at 45 degrees is disposed vertically above the drawing table 37, and the laser oscillator 31 is installed on the upper surface of the column 5 as in the case of FIG. Therefore 1. A fairly long arm-shaped mirror bracket 39 is provided to protrude laterally (left side in FIG. 3) from the L-portion wire guide device 13 side. However, the mirror 3 that changes the direction of the laser beam with a fixed optical axis from horizontal to vertical
5 is extremely small and light. Since the mirror bracket 39 only supports the mirror 35, there are no problems with strength, rigidity, etc.

Also, regarding the strength and rigidity of the drawing table 37, the photosensitive paper 33 is
There is no problem because no other external force is applied just by setting the sheets. By performing drawing recording with such a configuration, the machining locus can be recorded simultaneously during electrical discharge machining, without reducing the operating rate. Note that the configuration of the parts other than those described above is the same as that of the previous embodiment, and the description thereof will be omitted.

As described above, in addition to the fact that the spot light generating and emitting means and the locus recording means are not in contact with each other, the distance between the two means can be set at any distance. Furthermore, the former optical path can be easily bent using a mirror or the like. As a result, it is convenient to be able to change the arrangement positions of both means in various ways as in each of the embodiments described above.

In the embodiments shown in FIGS. 1 and 2, the upper surface of the workpiece 25 was used as a drawing table, and the photosensitive paper 33 was set there to record two drawings. The paper 33 can be set and removed extremely easily and quickly. Further, the laser oscillator 31, which corresponds to a conventional pen, does not need to be removed even after recording the trajectory, and there is no problem in electrical discharge machining even if it is left as is. Therefore, although it is not possible to perform processing and recording at the same time as in the embodiment shown in FIG. Not so.

J3, the recording accuracy is much higher than that of conventional pen writing. In other words, when writing with a pen, the line width is several tenths of a millimeter.
Although this is the limit, the spot diameter of the spot light can be narrowed down to an extremely small diameter using a lens or the like. In the extreme, it can be on the order of microns, so it is almost possible to correspond to 1 cumilon, which is often used as the minimum command unit for NC devices.

The wire cutting T11 electric processing machine of the present invention can be modified in various ways other than the above embodiments. For example, the trajectory recording means may also use thermal recording paper instead of photosensitive paper.

Alternatively, a laser beam is emitted from the workpiece support stand or the XY cross table! A drawing stand may be provided above the upper arm on the side of the upper soi 1f guide device. With this arrangement, processing and recording can be performed at the same time without the drawing table interfering with the processing work.

[Effect] As is clear from the above explanation, according to the wire-cut electric discharge machine of the present invention, it is possible to record the drawing of the relative motion locus between the wire guide device side and the workpiece side with extremely high precision in a non-contact manner. can. Moreover, the distance between the components for recording drawing can be changed freely.

[Brief explanation of the drawing]

FIG. 1 is a side view of one embodiment of the apparatus of the present invention, FIG. 2 is a side view of another embodiment, and FIG. 3 is a side view of another embodiment. (Explanation of main drawing symbols) 1... Wire-cut electrical discharge machine 13... Upper wire guide device placed on the side, one member that moves relative to the other) 25... Work (the other member that moves relative to each other) 31・
...Laser oscillator (spot light generation and radiation means) 33...
・Photosensitive paper (trajectory recording means) 37... Drawing table (trajectory recording means) Fig. 1

Claims (4)

[Claims] (1) A spot light generating and emitting means disposed on one member that moves relative to each other, and a spot light emitted from the spot light generating and emitting means disposed on the other member that moves relative to each other. A wire-cut electric discharge machine comprising a trajectory recording means for drawing and recording a trajectory of relative motion. (2) The spot light generating and emitting means disposed on one of the members making the relative motion is a laser oscillator provided on the upper side of the upper wire guide device, and the other trajectory recorder draws and records the locus of the relative motion. 2. A wire-cut electric discharge machine according to claim 1, wherein the means is photosensitive paper attached to the upper surface of the workpiece using the surface of the workpiece as a drawing platform. (3) The spot light generation and radiation means disposed on one of the members making the relative motion is a laser oscillator disposed on the top surface of the column, and the direction of the laser beam from the oscillator is changed by a mirror to cause the relative motion. 2. The wire-cut electric discharge machine according to claim 1, wherein the other trajectory recording means for drawing and recording the trajectory of the workpiece is a photosensitive paper attached to the upper surface of the workpiece using the surface of the workpiece as a drawing platform. (4) The spot light generating and emitting means disposed on one of the members that move relative to each other is a laser oscillator disposed on the top surface of the column, and the direction of the laser beam from the oscillator is changed by a mirror. Claim 1, characterized in that the other trajectory recording means for drawing and recording the trajectory of the relative motion is a photosensitive paper attached to a drawing table provided on the side of the XY cross table outside the processing tank. The wire cut electrical discharge machine described.