JPS5997814A - Wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To prevent stopping of machine operation in the middle of processing, by providing means for detecting the state of an electrode feeding bobbin for indicating the remaining amount of the wire during the processing work. CONSTITUTION:The change in the external diameter 15 of a wire feeding bobbin 3 is transmitted through movements of a lever 18 to a wire speed plate 20 and a wire diameter plate 21 to rotate these plates. The amount of the rotation is represented by an amount of rotation of a pointer 22 provided integral with the wire diameter plate 21 with reference to the wire remaining time plate 23 and indirectly indicated by the scale provided on the time plate 23. Therefore, by properly setting the intervals between the graduation lines on each plate and the absolute values for these lines, the time possible to continue the processing are indicated by the pointer 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire cutter processing apparatus, and in particular, it is provided with a means for detecting the state of an electrode supply bobbin ((4711) is the state of the electrode wire being processed). This invention relates to a wire cut h' that can be used to prevent a machine from stopping due to a state where there is no wire remaining during the process when the machine is being processed.

In the wire cutting N7I[] machining equipment with this size, the workpiece th is loaded on a table installed in the machining tank.
A KM'l source is connected between this workpiece and the electrode wire,
Electric discharge is performed while maintaining an appropriate discharge interval between the two, and arbitrary machining is performed. This interlaced M-pole wire is wound around a circular bobbin installed at an appropriate position on the machine, and the winding speed is kept constant between the winding bobbin and the winding bobbin depending on the processing condition. 11Ef is drawn out and subjected to discharge.

When machining a workpiece with such a device i'tVC, the operator can determine the remaining amount that the electrode wire will use to process the workpiece to the end, depending on the machining circumference of the workpiece and the current residual amount of the electrode wire. Judging empirically whether there is a worthy amount17
However, when it was determined that there was insufficient remaining amount of electrode wire to process, a new, unused electrode wire bobbin was attached and processing was carried out.Therefore, the operator may have misjudged the remaining amount of electrode wire. In the middle of machining, the wire ran out, so it was necessary to stop machining and replace the wire, which was said to reduce the efficiency of machining work.
When replacing with new wire and processing, there was a drawback that there were many unusable wires and wasted V-gum.

This invention was made in order to eliminate the drawbacks of the above-mentioned conventional devices.
In order to produce one loaf, we propose a wire force/feed discharge machine Ff which is equipped with a means to automatically detect the amount of 1lfp and which makes it possible to detect the actual machining time.
Ru.

Below, one embodiment of this invention will be described based on the drawings.
I will clarify.

Figure 1 shows the southern appearance of the Patchou according to this invention, which has a wire remaining amount detection flat membrane (17h). (1) is the bed, (2)
) is a column. This column (2) mainly has a wire feeding side bobbin (3) and a wire winding side bobbin (4).
The wire feed means (5) is an electrode wire that is guided in the direction of the workpiece via the guide row (6) and the upper nozzle (7). (7) The plate thickness of the workpiece is Kr, and 5 (8) is a mechanism (not shown) that can move up and down the electrode wire (5
) is the lower nozzle which receives the column (2) and is attached to the column (2) K by the marm (9). 01 is the electric discharge machining performed by applying pressure between the electrode wire (5) (<r, Ii) on the bed (1), and 04 is a wire remaining amount detection means, the details of which are given below. It is shown in FIGS. 2 and 3.

FIG. 2 is a front view of the wire remaining amount (detection means 04) in FIG. 1, and FIG. 3 is a sectional view taken along line nn in FIG. 2. In both figures, the reference numerals in FIGS. 1 and 4 indicate the same or corresponding parts. In Fig. 2, 0 indicates the outer diameter of the wound wire on the wire feeding side bobbin (3), and an insulated roller Qfil in contact with this wire outer diameter 0e is attached to the lever 08) via the shaft αη. . At the other end of this lever a8), there is a wire feed speed indicator (11, wire feed speed indicator 11, which is calibrated to indicate the actual wire feed speed (for example, portion) in actual processing, which operates in unison with the lever 08). Speed plate (a), wire diameter (mm) is calibrated b
Wire diameter plate (21) 7N and wire P4N 7
] A wire remaining time plate (c) that displays the workable time is attached coaxially. C) It is a pointer integrally formed on the ear control plate Q1). Incidentally, as is clear from the sectional view of FIG. 3, the remaining wire time plate rz3 is integrated with this +? +1lI (28') is fixed on the column (2), and the pointer 01 wire feed ii
Collar Q, 9, which is placed on the Aft time plate e1 and has a male thread on a part of the outer frame, and is tightened.
K, j: These are levers 08 on the reshaft (28')
It is semi-fixed so that it rotates as a unit following the movement of the (27 is a pressing plate, which engages the ring (2) and collar (C) with the shaft (28'). Next, the above mounting operation will be described. In the above device, the workpiece α3 is penetrated. Electrode wire (fi) f: While running with appropriate force and speed friction between the wire feeding side bobbin (3) and the wire winding side bobbin (4), move the tape tv (J2) in an arbitrary direction, and during this time 15-pole wire (5
) and the workpiece to perform electrical discharge machining with a desired trajectory on the workpiece Oa
The detailed 69 because it is not different from the agency? 7111■ Possible time display mechanism based on the remaining amount of wire, which is a feature of the above-mentioned body, will be explained here with [1 omitted]
01 work will be explained in detail.

Now, the parameters that indicate the machining time depending on the remaining amount of wire between the bags shown in FIG. 1 are the actual wire feeding speed, wire wire diameter, and wire weight. However, the weight of the wire changes depending on the processed part K1, and the outer diameter of the wire is 0.
1 can be indirectly known by detecting the insulated roller Od in contact with the stiffness and the lever 0 angle, that is, the wire outer diameter (19 change (e.g. decrease) Vi, the wire feed as the movement of the lever 0). The speed is transmitted to the plate and the wire diameter plate C) and rotates the wire. This amount of rotation is indirectly detected by the scale of time M; Become. Therefore, the interval between each scale marked with 1vC and the absolute value of each scale are set in advance by calculation and experiment. By setting the settings accurately, the machining time automatically changes depending on the amount of remaining wire by simply setting the initial value 1].
To explain this specifically using the example shown in Fig. 2, the predetermined actual wire feeding speed (for example, 6 towns) is set on the wire feeding speed plate (a). Select from the pointer (IQFC), then set the scale of this pointer (the wire diameter used for IQ (for example, 0.20 mm), VC, and the wire diameter plate I21), and use that point to feed the wire of the insulated roller θ. By installing the wire outer diameter of the bobbin (3) to 0υ, the wire diameter plate (21J17
) The pointer (A) displays the machining time possible based on the remaining amount of wire in this state inside the machine column (2) after the amount of remaining wire has elapsed. Furthermore, when the electrical discharge machining operation begins in this state, the decrease in the wire outer diameter 0υ is transmitted to the wire feed speed (a) and the wire wire diameter plate C21) by the mamming wheel, causing these to rotate together. Along with this rotation, the pointer moves by m1 on the remaining wire amount time plate 1'23, and the machining time possible based on the remaining amount of wire at each moment is displayed.

Even when using unused wire, the wire bobbin can be attached to the machine by contacting the insulated roller (Ifl) connected to the lever at with the outer diameter θ of the wire, and aligning each scale plate as described above. It is possible to accurately detect the machining time due to wire punching f!'.

An example was given on DJ W(,?) As explained, according to this invention, it is possible to objectively and accurately estimate the machining time based on the remaining amount of wire, which conventionally was completely dependent on the feeling of the operator. This not only gives the operator convenience in operating the machine, but also allows the electrode wire to be used without waste, making it a very useful force load.

[Brief explanation of drawings]

Figure 1 is an external view of this invention-implemented individual packaging rt, Figure 2 is an enlarged view of the main parts of the packaging shown in Figure 1, and Figure 3 is the I of Figure 2.
It is a sectional view taken along the line I-I+. (3)...Wire feeding side bobbin, (4)...Wire winding side bobbin, (5)...W pole wire, 03...Workpiece i, (141...Wire remaining amount Detection means, OQ...
・Wire outer diameter, frame...Insulated roller, (18)...Lever, wire...Wire feed speed 9 plates, c21)...Wire wire diameter plate, (21...Wire remaining amount time plate . Agent: Shin He Xian - Procedural amendment (spontaneous) July 51-1, 1981 1. Indication of case Patent application No. 1983-204967 2.
Title of the invention: Wire-cut electrical discharge machining device; 3. Relationship with the case of the person making the amendment Patent Applicant Address: 2-3 Row, Sanno-chome, Maruno, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Co., Ltd. Representative: Katayuni Hachibe 4, Agent Address: 1, Chiyo, Tokyo ■" Okibi no Uchi Nicho [" 2 No. 38-5, Subject of amendment (1) Detailed explanation of the invention in the specification 6, Contents of amendment (1) 5th basis 37th T to 5th in the specification Line + ([
It is an NO table located on (II u he = .) and is installed on processing tank 0]) and processing tank 01). The workpiece (13 is a table (fixed on B6, and a full-sized table is loaded on it).
F' QQ +. f Bed (1) top l (arranged 1
G table, (11) l Mako O-+NC table QG
ij is installed in the processing tank, 02 is a table, and the workpiece (13) is placed on this table 02. After a certain amount of time (c)
"O) should be corrected to "remaining time board 〆ya.'' Below (2) 73

Claims (3)

[Claims] (1) Supplied from the wire feeding side bobbin f17'1
41 In a wire cut electrical discharge machining device that performs electrical discharge machining by passing a wire through a workpiece and storing it in a winding side bobbin, the change in the outer diameter of the wire that is not stored in the wire feeding side bobbin is finally carried out. A wire force, 7-tooth electric discharge machining equipment, characterized in that it is equipped with a means for detecting the wire and a means for variably displaying the machining time possible with the remaining number of electrode wires according to the change in the outer diameter of the wire. (2) The means for displaying the machining time based on the remaining amount of electrode wire has means for specifying the diameter of the electrode wire in use and the feeding speed of the electrode wire, and the above-mentioned The wire-cut electric discharge machining apparatus 1 according to claim 1, characterized in that the machining time possible according to the remaining amount of electrode wire is calculated and displayed by setting the specified wire diameter and feed rate as parameters. (3) V of the wire outer diameter on the wire feeding side bobbin
The means for detecting the machining time consists of an insulated roller that is in contact with the wire outer diameter 1/r, and a lever that is not defeated by the insulated roller via a rotating shaft. In addition to the lever mentioned above, the lever dt is attached to the pane.
There are at least two circular plates that rotate 1 t [f], one of which does not have a scale for the wire diameter, and the other (C has a scale for the wire reverse speed, and two plates for stiffness). The wire cut wire J1 according to claim 1(i), characterized in that it is a display body fixed coaxially with a circular 4-shape, and has a scale of μ machinable time h. 'Processing farm.