JPS6186132A - Method and apparatus for holding scrap in wire-cut electric spark apparatus - Google Patents

Abstract

PURPOSE:To automate working and mounting and demounting by shifting a working table onto which a workpiece is loaded in the cut state to the position where a prescribed cut-out part is left, to the position of an adsorber feeding and demounting unit and holding scrap onto the workpiece by the adsorbing part. CONSTITUTION:Cutting work is carried-out from a working starting hole (a) formed onto a workpiece 1 along the direction of arrow of the closed loop by an electrode 12, and when the cutting work proceeds and the electrode 12 reaches a predetermined set timing position (b) of a rigid unit 23, said unit 23 is loaded onto a prescribed position, and the electromagnets 21 and 22 are electrically excited. The loading position of the unit 23 is the position where cutting work is completed, and the electromagnets 21 is on the scrap 30, and the electromagnets 22 and 22 are on the fixed part of the workpiece 11, and the electromagnets 22 and 22 attract the fixed part of the workpiece 11, and even if the electrode 12 reaches the work completion position (c) and the scrap 30 is isolated, said scrap 30 is held by the electromagnet 21.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a scrap holding method and device in a wire-cut electric discharge machining device, and in particular, a wire-cut electric discharge machining unit and a suction device supply attachment/detachment unit share a machining table. The first suction part is configured so as to be fixed to the workpiece, and its &g! A scrap holding method comprising holding a workpiece and its scrap by interrupting cutting by wire-cut electrical discharge machining using a rigid body unit having a second suction part that adheres to the part, that is, the scrap, and then cutting the remaining part. and its apparatus.

[Background of the invention, prior art]

-a, as machining progresses in a wire-cut electric discharge machining device, loose parts, that is, scraps are generated. Therefore, the portion where the scrap and the workpiece are connected gradually decreases.

This is because the scrap will hang down due to its own weight.

This may cause undesirable contact with the wire electrode, making the machining process unstable or causing the electrode to break.

The problem arises that For this reason, conventionally, when an unfavorable situation like the one described above occurs, there are measures such as forcibly removing the scrap by two people immediately before the occurrence, or using a scrubber, etc. to prevent the scrap from moving. It was being taught. However, there is a problem in that these methods must be carried out by one person.

In addition, as the cutting force progresses, the cutting force increases.
A wire-cut electrical discharge machining device has been proposed that includes means for automatically sequentially arranging permanent magnets so as to straddle the scrap and be connected to the scrap and the defined workpiece portion. This method requires three people to remove the permanent magnets and scraps, and has the disadvantage that it is not possible to automatically perform subsequent processing and finishing processing continuously.

In addition, it has been proposed to use a robot to fix a rigid body unit equipped with an electromagnet to the workpiece or its scrap, but this method has drawbacks such as requiring a robot and expensive means.

[Purpose of the invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and in a scrap holding method for holding scraps of a workpiece produced by wire-cut electrical discharge machining, a "tl workpiece is cut to a position where a predetermined cutout portion is left." With the wire electrode cut (or without cutting), move the processing table on which the workpiece is placed to the position of a suction device supply attachment/detachment unit such as a magnet supply attachment/detachment unit, and use a rigid unit equipped with an attraction part such as an electromagnet. To provide a scrap holding method in a wire-cut electrical discharge machining device, in which scrap is held in a workpiece, returned to its original position, and the remaining portion is cut, and a scrap holding device for carrying out the scrap holding method. Hereinafter, in order to make the above-mentioned suction device supply attachment/detachment unit and suction section easier to understand, they will be referred to as a magnet supply attachment/detachment unit and an electromagnet, respectively.

83 The adsorption is not limited to magnets or electromagnets, but electrostatic adsorption means can also be used.

[Example - Configuration]

An embodiment of the present invention will be described in detail with reference to the following aspects.

In FIG. 1, a combination device according to the present invention, which includes a wire-cut electric discharge machining unit 2 and a magnet and gutter supply attachment/detachment unit 7'73, is generally designated by the reference numeral 1. The main body of the wire-cut electrical discharge machining unit 2 and the main body of the magnet supply R/removal unit 3 are installed on the machine stand 26, and the The Y-axis direction moving table 5, which is moved by the control motor 10 in the vertical direction), slides with respect to the machine base 26.
It is installed in iJ Noh. An X-axis moving table 4, which is moved by a control motor 9 in the X: DJi direction (parallel to the plane of the paper in FIG. 1), is mounted on the Y-axis moving table so that it can move relative to the table 5. : Even 7' is shiru. Four table supports 27 are provided at the four corners of the X-axis moving table 4, and are attached to the processing table 8 or the X-axis moving table 4 via the table supports 27. Therefore, addition] − Table 8
can be moved in orthogonal X and Y axis directions by the control motor 9.1 (H2).

The processing table 8 has a hole 3 through which the wire electrode 12 passes.
2 is formed, and a hole 3 is formed on the upper surface of the processing table 8.
A side plate case 31 is attached to surround 2. The workpiece 11 is placed on the processing table 8 in the side plate case 31.
is now counted as a cent. The wire electrode 12 is fed from the wire electrode supply roller 13 through the tension roller 14 to the wire cut processing area of the workpiece 11. Control motors 19 and 20 for the X-axis direction and Y-axis direction move the upper guide 15 in the orthogonal X and Y-axis directions, and the inclination angle of the wire electrode 12 can be adjusted according to the workpiece 11. The wire electrode 12 advances from the upper guide 15 through the workpiece 11 and the hole 32 of the processing table 8 to the lower guide 16, and then passes through the tension roller 17.
The scrap material is then wound onto a scrap roller 18. Workpiece 1
When the wire electrode 1 is subjected to a wire cutting process, for example, pure water is poured onto the cut portion of the wire electrode 12 and the workpiece 11. The side plate case 31 is provided to prevent the pure water from scattering.

Y extending to the magnet supply detachable unit 3 side
A mounting post 6 is fixed to the end of the axially movable chiffle 5, and an inverted cantilever is formed by the mounting post 6 and a liquid collecting table 7 at the processing end. The free end 34 of the machining liquid collection platform 7 is inserted between the table supports 270 supporting the process table 8, that is, between a pair of table supports 27 and 27 located in the Y-axis direction.

I'm here. Therefore, the X-axis direction movable lever 11 is
When moving in the axial direction, the processing table 8 is configured to be able to slide on the processing liquid collection table 7 in the X-axis direction. This machining liquid collection table 7 is particularly useful when the magnet supply detachable unit 3 is used with a die-sinking electrical discharge machining unit. The magnet supply attachment/detachment unit 3 has a rigid unit supply throat 24 that can move up and down and to which a rigid unit attachment body 25 can be attached.

The Iu 1 body unit attachment body 25 is equipped with an electromagnet that is energized by an electromagnet lead wire 28 so that the rigid unino j 23 can be attached and detached.

Next, the rigid unit 23 will be explained with reference to FIGS. 2 and 3. The rigid body unit 23 is.

For example, electromagnets 21 and 22 are embedded in a body molded from a non-magnetic material such as aluminum (ferromagnetic material is partially embedded) at a predetermined interval and with the magnetic poles located on the bottom surface of the body. It is something. As shown in Figure 3, the electromagnet 21
．． 22 is controlled via an electromagnet lead wire 29, but the electromagnet 21 and the electromagnet 22 are configured so that they can be controlled individually and independently. In addition, FIG. 3 (a) is a sectional view.

FIG. 3(B) shows a bottom view taken along arrow A-A' in FIG. 3(A). Electromagnets 21 and 22 are.

For example, an electromagnetic coil 35 is wound around the center of a magnetic core 36 having a U-shaped cross section, and the electromagnetic coil 35 is connected to an electromagnet lead wire 29 .

Next, the operation of holding or removing scrap 30 generated during electrical discharge machining by the wire-cut electrical discharge machining unit 2 using the scrap holding device according to the present invention will be described with reference to FIG. Figure 2 is.

For example, the operation will be explained when the wire electrode 12 is used to cut the workpiece 11 along a closed loop of a predetermined shape, such as when machining a bearing hole in a die. Wa-
When performing J electrical discharge machining using the ear-cut electric discharge machining apparatus, a machining start hole is provided in advance in the workpiece 11z, and cutting is started from the machining start hole. The reference numeral a in the figure is the position where the machining start hole is provided, that is, the machining start position.

Therefore, the cutting process by the wire electrode 12 is started from the process start position a, and is performed along a predetermined closed loop (rectangular in the drawing), for example, in the direction of the arrow. and.

As the cutting process progresses as shown in the figure, when the wire electrode 12 reaches the predetermined central timing position of the rigid body unit 23, the body unit throat 23 moves to the predetermined position as shown in FIG. Placement>: With q and ru.

The electromagnets 21 and 22 in the rigid unit 23 are powered and energized. Rigid body uniy! - The mounting position of 23 is a position where cutting has already been completed, and the electromagnet 21.22 is placed so that the electric stone 21 is on the scrap 30 and the electromagnet 22.22 is on the fixed part of the workpiece 11. are predetermined at positions that do not straddle the cutting groove 33. In this way, the scrap 30 is attracted by the electromagnet 21, and the electromagnets 22, 22 are attached to the workpiece 1.
Since the fixed part of the workpiece 11 is suctioned, even if the cutting process progresses further and the wire electrode 12 reaches the processing end position C, and the scrap 30 moves kAi away from the fixed part of the workpiece 11, the scrap 30 Electromagnet 21 without moving its position
held by.

Furthermore, when removing the scrap 30 to the outside.

After controlling only the electromagnet 21 of the rigid body unit 23 to remain in an energized state and the electromagnets 22 and 22 to be in a de-energized state, the rigid body unit is connected to the magnet supply detachable unit 3.
The scrap 30 can be removed from the workpiece 11 by returning it to the rigid body unit mounting body. Therefore, according to the present invention, it is possible to freely retain and remove scraps during electrical discharge machining using a wire capt electrical discharge machining device, thereby completely performing full-power loe processing, including not only second cutting but also second cutting. This makes it possible to achieve greater automation.

In addition, if, for example, a die-sinking electrical discharge machining electrode (not shown) used for discharge discharge is attached to the position of the T11 body unit supply head 24 of the curse unit 3 before supplying the magnet, After machining with the wire cuff electric discharge power II machining, die-sinking electric discharge machining can be performed by simply moving the moving table. 3 will be called the die-sinker electrical discharge machining electrode attachment/detachment unit.

[Example - Effect]

The scrap holding method in the wire-cut electric discharge machining apparatus according to the present invention and the operation of the apparatus will be described in detail.

First, the workpiece 11 is placed on the processing table 8 and placed inside the side plate case 31. Next.

The machining table 8 is moved to a predetermined position in the wire-cut electric discharge machining unit 2 by driving the X-axis moving table 4 and the Y-axis moving table 5 by the control motors 9 and 10. The wire electrode 12 fed out from the wire electrode supply roller 13 is passed through the processing start hole a of the workpiece 1-1 and set so as to be wound around the scrap roller 18. In this state, the wire-cut electric discharge machining unit 2 is driven to cut the workpiece 11 in the direction of the arrow (see Figure 2), and the wire electrode 12 reaches the predetermined cent timing position of the rigid body unit 23. At this time, the drive of the wire cut electrical discharge machining unit 2 is stopped. By cutting or uncutting the wire electrode 12, it is fed out or slackened to move the X-axis moving table 4 in the X-axis direction, and thus move the processing table 8 toward the magnet supply attachment/detachment unit 3. Next, the magnet supply attachment/detachment unit 3 is driven to lower the rigid body unit supply head 24.

The rigid unit 23 is attracted to the electromagnet of the rigid unit mounting body 25 fixed to the hood 24 for supplying the rigid unit.
is placed on the workpiece ll. In this case, the electromagnet 21 of the rigid body unit 23 is placed on the scrap 3 of the workpiece 11, and the electromagnets 22 and 22 of the 13-piece body unit 23 are placed on the workpiece 11 (the third (See Figure 2)
. Next, power is supplied to the electric wire (2-wire lead wire 29) and the electronic 2-wire
1.22.22 is energized. Therefore, the +4!1 body unit 23 adsorbs the scrap 30 to the workpiece 11 in a fixed state. Next, the electromagnetic wire 28
1. ) Stop the power supply and separate the rigid body unit 23 from the body unit attachment body 25. Next, the control motor '8-
Drive the table to move in the X-axis direction4. Therefore, machining table 8 is wire cut electrical discharge machining unit) t-25 2ft 4
Move it to a state where wire cut electric discharge machining can be performed. Then, the wire electrode 12 is tensioned.

Drive the wire-cut electrical discharge machining device and perform wire-cut electrical discharge machining from the set timing position of the workpiece 11 to the position C. I[zu. Cut the wire electrode 12 from that L, move the processing table 8 again to the position of the magnet supply attachment/detachment unit 3, and move the rigid body unit 2
No. 3 electromagnet 22 + 22 ′: magnetized above, energizes the electromagnet of the rigid unit mounting body 25 to attract the rigid unit 23, and raises the rigid unit supply head 24. As a result, the scrap 30 is attracted to the electromagnet 21 of the rigid unit 23 and remains as a single piece, so that the scrap is extracted from the workpiece 11 and removed. The workpieces 11 subjected to electrical discharge machining are collected at a predetermined location, the machining table 8 is again moved to the position of the wire-cut electrical discharge machining unit, and the secondary workpiece is placed on the machining table 8 and centrifuged. On the other hand, after the processing table 8 is moved from the magnet supply attachment/detachment unit 3, the electromagnet 21 of the rigid body unit 23 is demagnetized, the scrap 30 is separated from the rigid body unit 23,
Collect the scraps 30 at a predetermined location. Of course, the removal of the scrap 30 and the workpiece 11 is another process.

For example, it can be removed and removed before being returned to the magnet supply attachment/detachment unit 3.

〔Effect of the invention〕

As explained above, according to the present invention, it is only necessary to install the suction device supply attachment/detachment unit in parallel with the wire-cut electric discharge machining device (there is no need to use special equipment such as rohono (-). Afterwards, wire cut electric discharge machining is performed on the workpiece using wave force and the attachment and detachment of the j, 1.'lj body unit to and from the workpiece are automatically performed.

Can be automated.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the scrap holding device in the wire cut hair processing apparatus according to the present invention, FIG. 2 is an explanatory diagram showing the positional relationship between the workpiece and the rigid unit, and FIG.
(a) and (b) are explanatory diagrams showing electromagnets used in the rigid body unit. 2... Wire cut electric discharge unit, 3... Magnet supply attachment/detachment unit, 4... X-axis direction moving table, 5... Y-axis direction moving table, 8... Processing table, 11. ...Workpiece, 12...Wire electrode, 2
1゜22...Electromagnet, 23...Rigid unit 7, 24
...i", iJ body unit supply head, 25... rigid body unit mounting body. 30... scrap.

Claims (2)

[Claims] (1) A cutting process in which the workpiece is cut by wire-cut electrical discharge machining to a state where a predetermined cutout part is left; a step of moving the workpiece from the cut electrical discharge machining unit to the position of the adsorption device supply attachment/detachment unit; a rigid body comprising a suction part that adsorbs scraps of the workpiece cut in the cutting process; and a suction part that adsorbs the workpiece; a step of fixing the unit across the scrap and the workpiece, and again moving the machining table on which the workpiece and the rigid body unit adsorbing it to the position of the wire-cut electric discharge machining unit. Scrap holding in a wire-cut electrical discharge machining apparatus, characterized in that the scrap holding method is characterized in that the scrap holding process is performed in a wire-cut electrical discharge machining apparatus, which comprises at least a step of returning the workpiece to a predetermined cut portion, and a cutting step of cutting the remaining part of the predetermined cut portion of the workpiece to completely separate the workpiece and the scrap. Method. (2) A wire-cut electrical discharge machining unit and a suction device supply attachment/detachment unit that share an X-axis moving table and a Y-axis moving table capable of moving in orthogonal X and Y-axis directions, and A processing table on which a workpiece is set is fixed to the directional movement table, and the adsorption device supply attachment/detachment unit is provided with a rigid body unit supply head that moves up and down and has a rigid body unit mounting body attached thereto. A rigid body unit is detachably attached to the rigid body unit mounting body, and the rigid body unit has a suction part that suctions the workpiece and a suction part that suctions scraps of the workpiece. A scrap holding device for wire-cut electrical discharge machining equipment.