JP6442282B2 - Wire processing apparatus and processing tank - Google Patents

Description

The present invention relates to a wire Ya machining device and the machining tank.

  Conventionally, a wire saw is known as an apparatus for cutting a workpiece into a thin plate shape (see, for example, Patent Document 1). A wire saw cuts a workpiece | work by arranging many wires with which abrasive grains adhered in parallel and running at high speed, and pressing a workpiece | work against the wire. The wire saw disclosed in Patent Document 1 supports the posture of a workpiece being cut by supporting the lower side of the cut workpiece with a receiving plate while supporting the lower side of the workpiece with a workpiece clamper when cutting the workpiece into a thin plate shape. keeping.

  In addition, as a technology that replaces the conventional wire saw, wire discharge that cuts the workpiece by applying a voltage between the wire immersed in the machining fluid and the workpiece to generate a discharge current between the wire and the workpiece. A processing apparatus is known (for example, refer to Patent Document 2).

JP-A-9-123163 JP 2014-166673 A

  The wire saw disclosed in Patent Document 1 includes a mechanism that operates a cylinder in response to a cut workpiece coming into contact with a tray and moves a workpiece clamper to fix the side of the workpiece. Such a mechanism is a complicated one that requires a mechanism for detecting the contact of the work with the receiving tray, a work clamper, and a cylinder for moving the work clamper.

Further, in the wire saw disclosed in Patent Document 1, when the workpiece is completely cut, the workpiece clamper is opened and the workpiece is released from being fixed. Therefore, when an external force is applied to the cut workpiece after the workpiece has been cut. Cannot properly hold the position of the workpiece.
In particular, in a wire electric discharge machining apparatus, an external force acts on the workpiece by the flow of the machining fluid even after the workpiece has been cut since the wire running at high speed is immersed in the machining fluid. Therefore, as disclosed in Patent Document 1, if the workpiece is released after the workpiece has been cut, the position of the workpiece cannot be appropriately maintained. In this case, the cut workpieces may come into contact with each other and the workpiece edges may be lost, resulting in a defective product.

The present invention has been made in view of such circumstances, suitably the multiple work piece even after cutting the workpiece to the work piece multiple is immersed in machining fluid with a simple structure keeping an object to provide a wire ya machining device and the machining tank capable.

In order to solve the above problems, the present invention employs the following means.
The present invention relates to a workpiece in a wire processing apparatus Ru comprising a processing unit for cutting the work piece double number, the processing unit includes a pair of holding mechanisms for holding the multiple work piece cut by word ear has, each of said pair of holding mechanisms, the receiving the multiple work piece and first receiving portion for receiving from below at a position above the multiple work piece the first receiving portion 2 receiving portions, a connecting portion for connecting the first receiving portion and the second receiving portion, and a rotating shaft provided between the first receiving portion and the second receiving portion and provided in the connecting portion. And a support part for rotating the connection part.

This onset Ming, a processing tank for accommodating the working fluid in order to cut the workpiece into a plurality of workpiece while being immersed in the pressurized coating liquid, holding the multiple work piece cut by word ear to have a pair of holding mechanisms, each of said pair of holding mechanisms, a first receiving portion for receiving the multiple work pieces from the lower, upper than the multiple work piece the first receiving portion A second receiving portion received at a position, a connecting portion connecting the first receiving portion and the second receiving portion, and provided between the connecting portion and between the first receiving portion and the second receiving portion And a support portion for rotating the connection portion around a rotation axis.

According to the present invention, the workpiece properly held capable wire Ya machining apparatus be in a simple structure a work piece number multiple to be immersed in the working fluid even after cutting the work piece more than the And a processing tank can be provided.

It is a whole lineblock diagram showing one embodiment of a wire electric discharge machining system. It is the fragmentary longitudinal cross-sectional view which looked at the state before a process of a wire electric discharge machining apparatus from the front. It is an AA arrow fragmentary sectional view of the wire electric discharge machining apparatus shown in FIG. It is a figure which shows the holding mechanism of FIG. 2, (a) is a front view, (b) is a rear view. It is a figure which shows the holding mechanism of FIG. 2, (a) is CC sectional view taken on the line of Fig.4 (a), (b) is a front view of a workpiece | work. FIGS. 5A and 5B are diagrams illustrating the holding mechanism of FIG. 4, in which FIG. 5A is a view of the first holding unit viewed from the back, and FIG. 5B is a view of the second holding unit viewed from the back. It is sectional drawing which shows the 1st holding | maintenance part and 2nd holding | maintenance part of FIG. 6, (a) is DD sectional view taken on the line of FIG. 6 (a), (b) is E of FIG.6 (b). It is -E arrow sectional drawing. It is the fragmentary longitudinal cross-sectional view which looked at the state in process of a wire electrical discharge machining apparatus from the front. FIG. 9 is a partial cross-sectional view of the wire electric discharge machining apparatus shown in FIG. It is the fragmentary longitudinal cross-sectional view which looked at the state at the time of completion of processing of a wire electric discharge machine from the front. It is a GG arrow partial sectional view of the wire electric discharge machining apparatus shown in FIG. It is the elements on larger scale of the wire electric discharge machining apparatus shown in FIG. It is the fragmentary longitudinal cross-section figure which looked at the state after processing of a wire electric discharge machine from the front. It is a HH arrow partial fragmentary sectional view of the wire electric discharge machining apparatus shown in FIG. It is a fragmentary sectional side view which shows the state which removed the inner tank after the process of a wire electric discharge machining apparatus. It is a front view of a workpiece | work holding mechanism, (a) is a front view which shows the state which the outer peripheral surface of the workpiece piece contacted the 1st receiving part, (b) is an outer peripheral surface of a workpiece piece, the 1st receiving part and the 1st receiving part It is a front view which shows the state which contacted both of 2 receiving parts. It is sectional drawing of a workpiece | work holding | maintenance mechanism, (a) is II sectional view taken on the line of Fig.16 (a), (b) is JJ arrow sectional drawing of Fig.16 (a).

Hereinafter, a wire electric discharge machining system 1 according to an embodiment of the present invention will be described with reference to the drawings.
In the present embodiment, the upward direction and the downward direction correspond to a direction against gravity and a direction of gravity, respectively. The left-right direction corresponds to the horizontal direction orthogonal to the direction of gravity.

As shown in the overall configuration diagram of FIG. 1, a wire electric discharge machining system 1 of the present embodiment includes a wire electric discharge machining apparatus 100 that cuts a workpiece W by electric discharge machining, and a power supply apparatus that supplies a pulse voltage to the wire electric discharge machining apparatus 100. 200 and a machining fluid supply device 300 that supplies the machining fluid to the wire electric discharge machining device 100.
The wire electric discharge machining apparatus 100 shown in FIG. 2 applies a pulse voltage between the wire 47 and the workpiece W to generate a discharge current in a state where the wire 47 and the workpiece W are not in contact with each other, thereby generating a plurality of workpieces W. This is a device that cuts the workpiece piece Wp.

  The power supply device 200 shown in FIG. 1 is a device that applies a pulse voltage between the wires 47 and the workpiece W. The control unit 210 of the power supply apparatus 200 transmits a discharge gap signal indicating a discharge state between the wire 47 and the workpiece W to the wire electric discharge machining apparatus 100. The discharge state between the wire 47 and the workpiece W corresponds to the gap (gap) between the wire 47 and the workpiece W. Therefore, the discharge gap signal is a signal indicating the distance of the gap (gap) between the wire 47 and the workpiece W.

The control unit 10 of the wire electric discharge machining apparatus 100 described later controls the workpiece feeding unit 20 based on the discharge gap signal transmitted from the control unit 210 of the power supply apparatus 200, and a gap (gap between the wire 47 and the workpiece W). The workpiece W is gradually cut by the wire 47 while keeping the distance (3) constant. The electric power that is the product of the pulse voltage supplied from the power supply device 200 to the wire electric discharge machining apparatus 100 and the discharge current flowing between the wire 47 and the workpiece W is energy for cutting the workpiece W by the wire 47.
When the control unit 210 of the power supply device 200 detects that a short-circuit state in which the wire 47 and the workpiece W are in contact with each other is detected, the control unit 210 temporarily stops the application of the pulse voltage, for example, between the wire 47 and the workpiece W. Various controls are performed according to the discharge state.

A machining fluid supply apparatus 300 shown in FIG. 1 is an apparatus that supplies machining fluid to the machining tanks (the outer tank 41 and the inner tank 42 shown in FIG. 2) of the machining unit 40 of the wire electric discharge machining apparatus 100. The machining unit 40 to which the machining liquid is supplied from the machining liquid supply apparatus 300 causes the machining liquid to flow in a portion where a discharge phenomenon occurs between the wire 47 and the workpiece W by running the wire 47 while being immersed in the machining liquid. Is always supplied. The machining fluid is used for cooling a portion where an electric discharge phenomenon occurs, removing workpiece waste generated in this portion, or the like.
As the working fluid, it is preferable to use deionized water having a high resistance value. For example, pure water, electric discharge machining oil, or the like is used. By interposing the machining fluid between the wire 47 and the workpiece W, a good discharge is generated between the wire 47 and the workpiece W, and the workpiece W can be cut.

  The amount of the machining liquid supplied from the machining liquid supply apparatus 300 to the machining tank of the wire electric discharge machining apparatus 100 is adjusted so that the temperature of the machining liquid becomes a desired temperature (for example, about 20 ° C.). Further, the electrical conductivity of the working fluid is appropriately adjusted with an ion exchange resin or the like so that the electrical conductivity is within a certain range (for example, 1 μS / cm to 250 μS / cm).

Hereinafter, each part of the wire electric discharge machining apparatus 100 provided in the wire electric discharge machining system 1 will be described.
As shown in FIG. 1, the wire electric discharge machining apparatus 100 includes a control unit 10 that controls the wire electric discharge machining apparatus 100, a workpiece feeding unit 20 that holds the workpiece W and sends it to the machining unit 40, and the workpiece W and the wire. A power supply unit 30 that applies a pulse voltage between the power supply unit 47 and a processing unit 40 that travels the wire 47 and cuts the work W sent by the work feeding unit 20 by the energy of a discharge current generated by a discharge phenomenon (processing part). With.

  The control unit 10 controls the wire electric discharge machining apparatus 100. Based on the discharge gap signal transmitted from the control unit 210 of the power supply device 200, the control unit 10 controls the workpiece feeding unit 20 so as to keep the gap (gap) distance between the wire 47 and the workpiece W constant. To do. Further, the control unit 10 transmits a control command to the machining unit 40 to control the traveling state such as the traveling speed of the wire 47. Further, the control unit 10 controls the power supply unit 30 so that an appropriate pulse voltage is applied between the wire 47 and the workpiece W.

  As shown in FIGS. 2 and 3, the work feeding unit 20 holds a holding mechanism 21 that holds the work W, a plurality of energizing rollers 22 that apply a pulse voltage to the work W, and a holding mechanism 21 in a moving mechanism 25. And a moving mechanism 25 that moves the workpiece W held by the holding mechanism 21.

The holding mechanism 21 includes a first holding part 21a and a second holding part 21b. As shown in FIG. 3, each of the first holding part 21a and the second holding part 21b is a plate-like member in a side view.
The first holding portion 21a and the second holding portion 21b may be formed of a conductive material such as aluminum or SUS, or may be formed of a nonconductive material such as glass, plastic, or rubber.

Further, as shown in FIG. 4A, the first holding portion 21a has a substantially circular shape in plan view, and as shown in FIG. 4B, the second holding portion 21b has a substantially circular shape in plan view. Yes.
As shown in FIGS. 6A and 7A, a first suction groove 21c is formed on the back surface of the first holding portion 21a (the surface in contact with the surface Wf of the workpiece W). Further, as shown in FIGS. 6B and 7B, a second suction groove 21d is formed on the back surface of the second holding portion 21b (the surface in contact with the back surface Wb of the workpiece W).

  One end of the first suction groove 21c is connected to the vacuum pipe Vac shown in FIG. 2, and one end of the first suction groove 21c is closed without being connected to another pipe. Therefore, when negative pressure is supplied from the vacuum pipe Vac to the first suction groove 21c in a state where the front surface Wf of the work W is in contact with the back surface of the first holding part 21a, the front surface Wf of the work W becomes the back surface of the first holding part 21a. (See FIG. 5A).

Similarly, one end of the second suction groove 21d is connected to the vacuum pipe Vac shown in FIG. 2, and one end of the second suction groove 21d is closed without being connected to another pipe. Therefore, when negative pressure is supplied from the vacuum pipe Vac to the second suction groove 21d with the back surface Wb of the workpiece W in contact with the back surface of the second holding portion 21b, the back surface Wb of the workpiece W becomes the back surface of the second holding portion 21b. (See FIG. 5A).
Whether the holding mechanism 21 holds the workpiece W by the negative pressure supplied from the vacuum pipe Vac is switched by the control unit 10.
The holding mechanism 21 is attached to the holding base 23 and is attached to the moving mechanism 25 via the holding base 23.

In the above description, the holding mechanism 21 is configured to hold the front surface Wf of the workpiece W with the first holding portion 21a and hold the back surface Wb of the workpiece W with the second holding portion 21b. There may be.
For example, depending on the weight of the workpiece W, either the first holding portion 21a or the second holding portion 21b may hold only one of the front surface Wf and the rear surface Wb.

  As shown in FIG. 3, the position in the axis X direction where the first holding part 21a and the second holding part 21b are arranged is different from the position in the axis X direction where the wire 47 is arranged. Therefore, even when the workpiece W held by the holding mechanism 21 moves so as to approach the wire 47, the first holding portion 21a and the second holding portion 21b are not cut by the wire 47.

The moving mechanism 25 moves the workpiece W in a direction (gravity direction) approaching the wire 47 from the upper side to the lower side by moving the holding mechanism 21 attached via the holding table 23, or from the lower side to the upper side. It is a mechanism that moves in the direction away from (the direction against gravity).
The moving mechanism 25 moves the holding mechanism 21 not only in the vertical direction (gravity direction) shown in FIG. 2, but also in the horizontal direction (horizontal width direction) shown in FIG. 2 and the horizontal direction (horizontal depth direction) shown in FIG. Can also be moved.
When the workpiece W is cut by the wire 47, the moving mechanism 25 is controlled by the control unit 10 to cut the workpiece W into a plurality of workpiece pieces Wp in the plate thickness direction (axis X direction in FIG. 3). In this manner, the workpiece W is moved from the upper side to the lower side with respect to the wire 47.

  The power supply unit 30 shown in FIG. 2 supplies a pulse voltage between the wire power supply 31 electrically connected to the wire 47 and the energizing roller 22 in contact with the workpiece W. As shown in FIG. 2, the position where the wire feeder 31 supplies power to the wire 47 is a portion of the wire 47 that travels downward in the vertical direction. On the other hand, the portion where the wire 47 and the workpiece W are close to each other and the electric discharge machining is performed is a portion of the wire 47 that travels in the vertical direction.

  The power supply unit 30 can adjust the vertical position of the wire supply electron 31 with respect to the wire 47 by a drive mechanism (not shown). By adjusting the contact pressure of the wire supply electron 31 with respect to the wire 47 by a drive mechanism (not shown), the power supply state from the wire supply electron 31 to the wire 47 can be appropriately maintained.

  Therefore, the pulse voltage applied by the wire power supply 31 is processed from both the route via the wire 47 arranged on the outer peripheral surface of the main roller 45 and the route via the wire 47 arranged on the outer peripheral surface of the main roller 46. Transmitted to the position. Since resistance due to the material of the wire 47 exists, a voltage drop corresponding to the path from the position where the wire feeder 31 supplies power to the position where electric discharge machining is performed occurs. For this reason, the pulse voltage supplied to the wire feeder 31 is set in consideration of the voltage drop according to the path.

  The wires 47 shown in FIG. 3 are arranged at a plurality of positions in the direction along the axis X so as to cut a cylindrical workpiece W having the axis X as the central axis into a plurality of workpiece pieces Wp. 2 can supply pulse voltages to the wires 47 arranged at a plurality of positions in the direction along the axis X in a lump. The wire feeder 31 is preferably made of cemented carbide because it has excellent wear characteristics and high conductivity.

As shown in FIGS. 2 and 4, the workpiece feeding unit 20 is arranged in an opening 24 formed between the first holding part 21 a and the second holding part 21 b and extends in the same direction as the axis X. The three energizing rollers 22 are provided.
Further, as shown in FIGS. 5A and 5B, each of the three energizing rollers 22 is disposed so as to be in contact with a flat surface So (orientation flat surface) formed on the upper end side of the workpiece W. ing. Therefore, the pulse voltage applied from the power supply unit 30 to the energizing roller 22 is transmitted to the workpiece W via the flat surface So.

  The energizing roller 22 is formed in a cylindrical shape so as to reduce the contact area with the workpiece W. Therefore, the wire electric discharge machining apparatus 100 of the present embodiment does not employ a structure that holds the workpiece W by bonding the energizing roller 22 and the workpiece W with a conductive adhesive. Therefore, the wire electric discharge machining apparatus 100 according to the present embodiment holds the workpiece W by the holding mechanism 21.

Various shapes can be adopted as the surface shape of the energizing roller 22 as long as the energizing roller 22 and the flat surface So of the work W are in line contact with each other. For example, a saddle type or a polygonal column type can be adopted.
The energizing roller 22 is attached to an opening 24 formed between the first holding portion 21a and the second holding portion 21b in a state where the energizing roller 22 can be energized.
The energizing roller 22 and the holding base 23 are each formed of a conductive material such as aluminum.

  As shown in FIG. 2, the processing unit 40 stores a processing liquid in which the wire 47 and the work W are immersed, a processing tank including an outer tank 41 and an inner tank 42, and a work in which the work W is cut into a plurality of pieces. A pair of work holding mechanisms comprising a work holding mechanism 43 and a work holding mechanism 44 while holding the piece Wp, and a pair of main rollers comprising a main roller 45 and a main roller 46 for running the wire 47 in a state of being immersed in the machining liquid. And a wire 47 traveling by a pair of main rollers.

  The outer tank 41 accommodates the processing liquid supplied from the processing liquid supply apparatus 300, and the inner tank 42 is detachably disposed inside. The machining tank in which the inner tank 42 is disposed inside the outer tank 41 is supplied from the machining liquid supply device 300. The inner tank 42 can be removed by sliding the workpiece W from the outer tank 41 after the workpiece W is cut into a plurality of workpiece pieces Wp, as shown in FIG.

The workpiece holding mechanisms 43 and 44 are mechanisms that hold a plurality of workpiece pieces Wp cut by the wire 47.
As shown in FIG. 2, the workpiece holding mechanism 43 receives a first receiving portion 43a that receives a plurality of workpiece pieces Wp from below, and receives a plurality of workpiece pieces Wp at a position above the first receiving portion 43a. It has the 2nd receiving part 43b, the connection part 43c which connects the 1st receiving part 43a and the 2nd receiving part 43b, and the support shaft 43d provided in the connecting part 43c. The support shaft 43d is attached to the inner tank 42, and rotates the connecting portion 43c around a rotation axis Y1 (see FIG. 3) between the first receiving portion 43a and the second receiving portion 43b.

  As shown in FIG. 2, the workpiece holding mechanism 44 includes a first receiving portion 44a that receives a plurality of workpiece pieces Wp from below, and a plurality of workpiece pieces Wp that are positioned above the first receiving portion 44a. A second receiving portion 44b, a connecting portion 44c connecting the first receiving portion 44a and the second receiving portion 44b, and a support shaft 44d provided on the connecting portion 44c. The support shaft 44d is attached to the inner tank 42, and rotates the connection portion 44c around a rotation axis Y2 (see FIG. 11) between the first receiving portion 44a and the second receiving portion 44b.

  The main roller 45 and the main roller 46 are formed in a cylindrical shape having the same outer diameter, and have a structure in which a metal central shaft is covered with a resin. On the outer peripheral surface of each of the main roller 45 and the main roller 46, a substantially V-shaped V groove extending in the direction of travel of the wire 47 is perpendicular to the direction of travel of the wire 47 (on the axis X shown in FIG. Direction).

The interval (pitch) between the V grooves formed in the main roller 45 and the main roller 46 is appropriately set according to the number and thickness of the workpiece pieces Wp obtained by cutting (slicing) the workpiece W.
A wire 47 is wound around the main roller 45 and the main roller 46 with a tension adjusted from a supply bobbin (not shown), and sent to a take-up bobbin (not shown).

  The wire 47 is connected to one wire, and is supplied from the supply bobbin and fitted to the outer peripheral surfaces of the main roller 45 and the main roller 46, and many times (up to about 2000 times) outside the main roller 45 and the main roller 46. After being wound spirally, it is wound on a winding bobbin. The main component of the material of the wire 47 is iron, and the diameter of the wire is, for example, about 0.12 mm.

  The control unit 10 rotates the main roller 45 and the main roller 46 at the same speed in the direction indicated by the arrow in FIG. The control unit 10 can also rotate the main roller 45 and the main roller 46 at the same speed in the direction opposite to the direction indicated by the arrow in FIG. The controller 10 can adjust the traveling speed of the wire 47 to an arbitrary speed within a range of, for example, 100 m / min or more and 900 m / min.

  The main roller 45 and the main roller 46 run while the wire 47 is immersed in the machining liquid. Therefore, when a pulse voltage is applied between the wire 47 and the workpiece W, a position where a discharge phenomenon occurs between them is in the machining fluid. Since the machining fluid is always supplied to the position where the discharge phenomenon occurs, the position (discharge position) where the workpiece W is cut by the machining fluid is cooled. Moreover, the processing waste of the workpiece W generated by the occurrence of the discharge phenomenon can be collected in the processing liquid.

Next, an operation in which the wire electric discharge machining apparatus 100 cuts (slices) the workpiece W by an electric discharge phenomenon will be described.
2, 8, 10, and 13 are front views showing a state before processing, a state during processing, a state when processing is completed, and a state after processing, respectively, of the wire electric discharge machining apparatus 100.
On the other hand, FIG. 3, FIG. 9, FIG. 11 and FIG. 14 are side views showing a state before processing, a state during processing, a state when processing is completed, and a state after processing, respectively.
Moreover, AA arrow sectional drawing of FIG. 2 is FIG. 3, and BB arrow sectional drawing of FIG. 3 is FIG. Moreover, the FF arrow cross section of FIG. 8 is FIG. 9, the GG arrow cross section of FIG. 10 is FIG. 10, and the HH arrow cross section of FIG. 13 is FIG.

  2 and 3 show a state of the wire electric discharge machining apparatus 100 before machining. In the state before processing, the workpiece feeding unit 20 holds the workpiece W by the holding mechanism 21. Further, the moving mechanism 25 of the workpiece feeding unit 20 adjusts the position of the workpiece W so as to be arranged above the wire 47 by a control command from the control unit 10.

  The control unit 10 rotates the main roller 45 and the main roller 46 in the same direction so as to have a desired traveling speed in the state before processing shown in FIGS. 2 and 3. Further, the control unit 10 controls the power supply unit 30 so that a desired pulse voltage is applied between the workpiece W and the wire 47. In addition, the control unit 10 transmits a control command to the machining fluid supply apparatus 300 so that the wire 47 travels in the machining fluid while being immersed in the machining fluid.

  Thereafter, the control unit 10 transmits a control command to the workpiece feeding unit 20 so as to move the workpiece W with respect to the wire 47 from above to below. When the workpiece W approaches the wire 47 and a discharge phenomenon occurs, the workpiece W is gradually cut, and the machining state shown in FIGS. 8 and 9 is obtained.

  As shown in FIG. 9, during the machining of the wire electric discharge machining apparatus 100, the workpiece W is in a state where the upper side from the wire 47 is not cut, and the lower side from the wire 47 is cut into a plurality of pieces from the workpiece W. Work piece Wp. The control unit 10 advances the cutting of the workpiece W by moving the workpiece W further downward from the state shown in FIGS. 8 and 9. When the cutting of the workpiece W is completed, the state at the completion of machining shown in FIGS. 10 and 11 is obtained.

10 and 11, the flat surface So located at the upper end of the workpiece W is disposed below the wire 47 as shown in FIG.
That is, the control unit 10 controls the moving mechanism 25 of the work feeding unit 20 so that the work W is completely cut by the wire 47 and further cut to a part of the energizing roller 22.

The control unit 10 controls the moving mechanism 25 of the work feeding unit 20 so as to cut a part of the energizing roller 22 until the work W is cut and completely separated into a plurality of work pieces Wp. This is because the pulse voltage is reliably supplied from the energizing roller 22 to the workpiece W.
As shown in FIG. 12, when the work feeding unit 20 moves downward until a part of the energizing roller 22 is cut by the wire 47, the work W is completely separated into a plurality of work pieces Wp.

  The control unit 10 controls the negative pressure source (not shown) so that the negative pressure is not supplied from the vacuum pipe Vac after the work W is completely separated into a plurality of work pieces Wp, thereby the first holding unit. The workpiece piece Wp held by 21a is separated from the first holding portion 21a, and the workpiece piece Wp held by the second holding portion 21b is separated from the second holding portion 21b. As a result, all of the plurality of workpiece pieces Wp cut from the workpiece W are not held by the holding mechanism 21.

  Thereafter, the control unit 10 controls the moving mechanism 25 of the workpiece feeding unit 20 so as to move the workpiece feeding unit 20 from below to above. The control unit 10 moves the workpiece feeding unit 20 to a predetermined position where the lower end of the holding mechanism 21 of the workpiece feeding unit 20 is above the wire 47 to obtain a state after processing shown in FIGS. 13 and 14.

  Thereafter, the control unit 10 stops the rotation of the main roller 45 and the main roller 46. Further, the control unit 10 controls the power supply unit 30 so as to stop the application of the pulse voltage between the workpiece W and the wire 47. Further, the control unit 10 transmits a control command so as to stop the supply of the machining liquid by the machining liquid supply apparatus 300.

As shown in FIG. 14, a removable door 41 a is attached to the front side of the outer tub 41. The inner tank 42 of this embodiment can be slid in the horizontal direction (left direction in FIG. 14) by removing the door 41a of the outer tank 41, and the inner tank 42 can be removed as shown in FIG. .
By sliding the inner tank 42 holding a plurality of workpiece pieces Wp in the horizontal direction and removing them from the outer tank 41, the workpiece pieces Wp are pulled up and collected above the inner tank 42 without touching the wire 47. Can do.

10 and 11, the plurality of workpiece pieces Wp cut from the workpiece W are held by the workpiece holding mechanism 43 and the workpiece holding mechanism 44 in the state at the completion of machining of the wire electric discharge machining apparatus 100 shown in FIGS. 10 and 11.
As described above, until the control unit 10 stops the rotation of the main roller 45 and the main roller 46, the wire 47 is running while being immersed in the processing liquid. Therefore, a water flow in the same direction as the wire 47 and the traveling direction is generated in the processing tank as the wire 47 travels. The workpiece piece Wp is held by the workpiece holding mechanism 43 and the workpiece holding mechanism 44 so that the plurality of workpiece pieces Wp do not come into contact with each other due to the external force due to the water flow and damage to the edge or the like occurs.

  As shown in FIG. 16A, when the workpiece piece Wp is gradually lowered from the upper side to the lower side before the completion of the machining by the wire electric discharge machining apparatus 100, the lower end side of the workpiece piece Wp becomes the first receiving portion 43a of the workpiece holding mechanism 43 and the workpiece. It contacts the first receiving portion 44a of the holding mechanism 44.

  The connecting portion 43c is supported by the support shaft 43d so as to be rotatable about the rotation axis Y1 between the first receiving portion 43a and the second receiving portion 43b. Therefore, when the lower end side of the work piece Wp comes into contact with the first receiving portion 43a, the second receiving portion 43b rotates around the rotation axis Y1 (in the direction indicated by the solid line in FIG. 16A).

  Similarly, the connecting portion 44c is supported by the support shaft 44d so as to be rotatable about the rotation axis Y2 between the first receiving portion 44a and the second receiving portion 44b. Therefore, when the lower end side of the work piece Wp comes into contact with the first receiving portion 44a, the second receiving portion 44b rotates around the rotation axis Y2 (in the direction indicated by the solid line in FIG. 16A).

  When the cutting of the workpiece W proceeds and the workpiece W is completely cut into a plurality of workpiece pieces Wp in the plate thickness direction (the direction of the axis X in FIG. 14), the second receiving portion 43b and the second receiving portion 44b are It will be in the state shown in FIG.16 (b) which contacted the outer peripheral surface of the workpiece piece Wp.

  In this way, when the cutting of the workpiece W by the wire 47 proceeds and the workpiece W is completely cut into a plurality of workpiece pieces Wp in the thickness direction, the lower end side of the workpiece piece Wp is the first receiving portion 43a and the first. It comes into contact with the receiving portion 44a, and the upper side from the lower end side of the work piece Wp is in contact with the second receiving portion 43b and the second receiving portion 44b. Each work piece Wp has two points on the lower end side in contact with the first receiving part 43a and the first receiving part 44a, and two points on the side side in contact with the second receiving part 43b and the second receiving part 44b. It becomes a state held at a point.

On the other hand, when the work piece Wp is lifted upward and collected from the inner tank 42, the outer peripheral surface of the work piece Wp is moved to the first receiving portion 43a and the first receiving portion 44a as the work piece Wp is lifted upward. Spaced apart from the top. Further, the second receiving portion 43b and the second receiving portion 44b rotate around the rotation axes Y1 and Y2 in the direction away from the outer peripheral surface of the work piece Wp (the direction opposite to the direction indicated by the solid line in FIG. 16A). To do. Therefore, none of the first receiving portion 43a, the first receiving portion 44a, the second receiving portion 43b, and the second receiving portion 44b comes into contact with the outer peripheral surface of the work piece Wp, and the work piece Wp is lifted upward. .
That is, when the workpiece piece Wp is pulled upward from the inner tank 42 and collected, the state shown in FIG. 16B is changed to the state shown in FIG.

As shown in FIG. 17A, the first receiving portion 43a includes a first shaft member 43e extending in the direction of the rotation axis Y1 parallel to the axis X direction perpendicular to the traveling direction in which the wire 47 travels, and the first shaft It has the cylindrical 1st rotary body 43f attached rotatably to the outer peripheral surface of the member 43e.
The second receiving portion 43b includes a second shaft member 43g extending in the direction of the rotation axis Y1 and a cylindrical second rotating body 43h that is rotatably attached to the outer peripheral surface of the second shaft member 43g.

As shown in FIG. 17B, the first receiving portion 44a includes a first shaft member 44e extending in the direction of the rotation axis Y2 parallel to the axis X direction orthogonal to the traveling direction in which the wire 47 travels, It has the cylindrical 1st rotary body 44f attached to the outer peripheral surface of the uniaxial member 44e so that rotation is possible.
The second receiving portion 44b includes a second shaft member 44g extending in the direction of the rotation axis Y2, and a cylindrical second rotating body 44h that is rotatably attached to the outer peripheral surface of the second shaft member 44g.

The first shaft member 43e, the first shaft member 44e, the second shaft member 43g, and the second shaft member 44g are formed of a highly rigid member such as metal.
On the other hand, the first rotating body 43f, the first rotating body 44f, the second rotating body 43h, and the second rotating body 44h are formed of an elastic member such as sponge-like resin or rubber. The reason why the elastic member is formed is to absorb an impact when the rotating body and the work piece Wp come into contact with each other so as to prevent chipping of the work piece Wp. Further, the reason why the rotating body is used is to prevent the work piece Wp from being damaged by sliding (sliding) the contact surfaces when the work piece Wp comes into contact with each receiving portion.

The operation and effects of the present embodiment described above will be described.
According to the wire electric discharge machining apparatus 100 of the present embodiment, when the workpiece W is moved from above to below by the workpiece feeding unit 20, the workpiece W approaches the wire traveling while being immersed in the machining liquid. A pulse voltage is applied from the power supply unit 30 between the wire 47 and the workpiece W. For this reason, when the workpiece W is in a state of maintaining an appropriate gap (gap) with the wire 47, a discharge current flows between the wire 47 and the workpiece W, and the workpiece W is cut.

  When the workpiece feeding unit 20 gradually moves the workpiece W downward and the cutting of the workpiece W proceeds, the lower end side of the workpiece piece Wp cut into a plurality of pieces from the workpiece W is the first receiving portion 43a of the workpiece holding mechanism 43 and the workpiece. It contacts the first receiving portion 44a of the holding mechanism 44.

  The 1st receiving part 43a is connected to the 2nd receiving part 43b by the connection part 43c. Further, the connecting portion 43c is supported by the support shaft 43d so as to be rotatable around the rotation axis Y1 between the first receiving portion 43a and the second receiving portion 43b. Therefore, when the lower end side of the work piece Wp comes into contact with the first receiving portion 43a, the second receiving portion 43b rotates around the rotation axis Y1 accordingly. When the cutting of the workpiece W proceeds and the workpiece W is completely cut into a plurality of workpiece pieces Wp in the plate thickness direction (the direction of the axis X in FIG. 14), the second receiving portion 43b becomes the outer peripheral surface of the workpiece piece Wp. It will be in the state which touched.

  Similarly, the 1st receiving part 44a is connected to the 2nd receiving part 44b by the connection part 44c. Further, the connecting portion 44c is supported by the support shaft 44d so as to be rotatable around the rotation axis Y2 between the first receiving portion 44a and the second receiving portion 44b. Therefore, when the lower end side of the work piece Wp comes into contact with the first receiving portion 44a, the second receiving portion 44b rotates around the rotation axis Y2 accordingly. When cutting of the workpiece W proceeds and the workpiece W is completely cut into a plurality of workpiece pieces Wp in the thickness direction, the second receiving portion 44b comes into contact with the outer peripheral surface of the workpiece piece Wp.

  In this way, when the cutting of the workpiece W by the wire 47 proceeds and the workpiece W is completely cut into a plurality of workpiece pieces Wp in the thickness direction, the lower end side of the workpiece piece Wp is the first receiving portion 43a and the first. It comes into contact with the receiving portion 44a, and the upper side from the lower end side of the work piece Wp is in contact with the second receiving portion 43b and the second receiving portion 44b. Each work piece Wp has two points on the lower end side in contact with the first receiving part 43a and the first receiving part 44a, and two points on the side side in contact with the second receiving part 43b and the second receiving part 44b. It becomes a state held at a point.

When the workpiece W is completely cut into a plurality of workpiece pieces Wp, the workpiece piece Wp is not held by the holding mechanism 21 of the workpiece feeding unit 20. Further, since the workpiece piece Wp is immersed in the machining fluid, an external force is applied to the workpiece by the flow of the machining fluid even after the cutting of the workpiece W is completed.
According to the present embodiment, even after the cutting of the workpiece W is completed, a plurality of workpiece pieces Wp are held by the workpiece holding mechanism 43 and the workpiece holding mechanism 44. Therefore, even after the workpiece W is cut into a plurality of workpiece pieces Wp, the plurality of workpiece pieces Wp immersed in the machining liquid can be appropriately held with a simple configuration.

According to the wire electric discharge machining apparatus 100 of the present embodiment, the machining tank that stores the machining liquid includes the outer tank 41 and the inner tank 42 that is detachably disposed inside the outer tank 41. The work holding mechanism 43 and the work holding mechanism 44 are attached to the inner tank 42.
Therefore, the work holding mechanism 43 and the work holding mechanism 44 hold a plurality of workpiece pieces Wp by removing the inner tank 42 from the outer tank 41 after the work for cutting the workpiece W into a plurality of workpiece pieces Wp is completed. The inner tank 42 can be removed in a state. Therefore, the workpiece piece Wp can be pulled up from the inner tank 42 and collected without the wire 47 being arranged upward.

  When the work piece Wp is lifted upward from the inner tank 42 and collected, the outer peripheral surface of the work piece Wp is moved upward from the first receiving portion 43a and the first receiving portion 44a as the work piece Wp is lifted upward. Separate. Further, the second receiving portion 43b and the second receiving portion 44b rotate around the rotation axes Y1 and Y2 in a direction away from the outer peripheral surface of the work piece Wp. Therefore, none of the first receiving portion 43a, the first receiving portion 44a, the second receiving portion 43b, and the second receiving portion 44b comes into contact with the outer peripheral surface of the work piece Wp, and the work piece Wp is lifted upward. .

  In this way, the workpiece holding mechanism 43 and the workpiece holding mechanism 44 are merely lifted from the inner tank 42 without performing a special operation for releasing the state of holding the workpiece Wp. The workpiece piece Wp can be easily collected.

In the wire electric discharge machining apparatus 100 of the present embodiment, the first receiving portion 43a includes a first shaft member 43e extending in the direction of the axis X, and a cylindrical first rotating body 43f that is rotatably attached to the outer peripheral surface thereof. . Moreover, the 1st receiving part 44a has the 1st shaft member 44e extended in the axis line X direction, and the cylindrical 1st rotary body 44f attached to the outer peripheral surface rotatably. Therefore, the first rotating body 43f and the first rotating body 44f rotate when the outer peripheral surface of the work piece Wp comes into contact with or separates from the first receiving portion 43a and the first receiving portion 44a.
As described above, when the outer peripheral surface of the work piece Wp contacts or separates from the first receiving portion 43a and the first receiving portion 44a, the work piece Wp and the first receiving portion 43a or the work piece Wp and the first Since sliding with the receiving portion 44a is suppressed, it is possible to suppress problems such as damage to the work piece Wp.

In the wire electric discharge machining apparatus 100 of the present embodiment, the second receiving portion 43b includes a second shaft member 43g extending in the axis X direction, and a cylindrical second rotating body 43h that is rotatably attached to the outer peripheral surface thereof. . Moreover, the 1st receiving part 44a has the 2nd shaft member 44g extended in the axis line X direction, and the cylindrical 2nd rotary body 44h attached to the outer peripheral surface rotatably. Therefore, the second rotating body 43h and the second rotating body 44h rotate when the outer peripheral surface of the work piece Wp contacts or separates from the second receiving portion 43b and the second receiving portion 44b.
As described above, when the outer peripheral surface of the work piece Wp is in contact with or away from the second receiving portion 43b and the second receiving portion 44b, the work piece Wp and the second receiving portion 43b or the work piece Wp and the second Since sliding with the receiving portion 44b is suppressed, it is possible to suppress problems such as damage to the work piece Wp.

  In the wire electric discharge machining apparatus 100 of the present embodiment, the first rotating body 43f, the first rotating body 44f, the second rotating body 43h, and the second rotating body 44h are formed by elastic members. Therefore, when these rotating bodies contact the outer peripheral surface of the work piece Wp, it is possible to more reliably suppress problems such as damage to the work piece Wp.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Wire electrical discharge machining system 10 Control part 20 Work feeding unit (work feeding part)
21 holding mechanism 21a first holding portion 21b second holding portion 21c first suction groove 21d second suction groove 22 energization roller (energization portion)
23 Holding base 24 Opening 25 Moving mechanism 30 Feeding unit 31 Wire feeding 40 Processing unit (processing unit)
41 Outside tank (processing tank)
41a Door 42 Inside tank (processing tank)
43, 44 Work holding mechanisms 43a, 44a First receiving portions 43b, 44b Second receiving portions 43c, 44c Connection portions 43d, 44d Support shaft (support portion)
43e, 44e 1st shaft member 43f, 44f 1st rotating body 43g, 44g 2nd shaft member 43h, 44h 2nd rotating body 45, 46 Main roller 47 Wire 100 Wire electric discharge machining apparatus 200 Power supply apparatus 300 Working fluid supply apparatus So Flat Surface Vac Vacuum piping W Work Wf Front surface Wb Back surface X Axis Y1, Y2 Rotating shaft

Claims (10)

A wire processing apparatus Ru comprising a processing unit for cutting the workpiece to the work piece multiple,
Wherein the processing portion includes a pair of holding mechanisms for holding the multiple work piece cut by word ear,
Each of the pair of holding mechanisms is
A first receiving portion for receiving the work piece of the multiple from below,
A second receiving portion for receiving the work piece of the multiple at a position above said first receiving portion,
A connecting portion connecting the first receiving portion and the second receiving portion;
Wai Ya machining apparatus having a support portion for rotating the connecting portion to the pivot axis between the second receiving portion and the first receiving portion together is provided in the connecting portion. The processing section has a processing tank in which a processing liquid is accommodated and the wire that travels while being immersed in the processing liquid is provided,
A power feeding unit that applies a voltage between the wire and the workpiece;
A workpiece feeding section that holds the workpiece and moves the workpiece from above to below with respect to the wire so as to cut the workpiece into a plurality of workpiece pieces in the plate thickness direction;
The processing tank includes an outer tank and an inner tank that is detachably disposed inside the outer tank.
Wai Ya machining apparatus according to claim 1, wherein the pair of holding mechanisms are attached to the inner tank. The first receiving portion includes a first shaft member extending in an axial direction orthogonal to a traveling direction in which the wire travels, and a cylindrical first rotating body that is rotatably attached to an outer peripheral surface of the first shaft member. Wai ya machining apparatus according to claim 1 or claim 2 having. It said second receiving portion, Wai Ya of claim 3 having a second shaft member extending in the axial direction, and a second rotor cylindrical rotatably mounted on an outer circumferential surface of the second shaft member machining equipment. Wai Ya machining apparatus of claim 4 wherein the first rotating body and said second rotary member is formed by an elastic member. A processing tank for accommodating the working fluid in order to cut the workpiece into a plurality of workpiece while being immersed in the pressurized coating solution,
A pair of holding mechanism for holding the work piece number multiple cut by word ear,
Each of the pair of holding mechanisms is
A first receiving portion for receiving the work piece of the multiple from below,
A second receiving portion for receiving the work piece of the multiple at a position above said first receiving portion,
A connecting portion connecting the first receiving portion and the second receiving portion;
A processing tank having a support portion that is provided in the connection portion and rotates the connection portion around a rotation axis between the first receiving portion and the second receiving portion. An outer tub and an inner tub disposed inside the outer tub and containing the processing liquid;
The inner tank is detachable from the outer tank,
The processing tank according to claim 6, wherein the pair of holding mechanisms are attached to the inner tank.   The first receiving portion includes a first shaft member extending in an axial direction orthogonal to a traveling direction in which the wire travels, and a cylindrical first rotating body that is rotatably attached to an outer peripheral surface of the first shaft member. The processing tank of Claim 6 or Claim 7 which has.   The processing tank according to claim 8, wherein the second receiving portion includes a second shaft member extending in the axial direction, and a cylindrical second rotating body that is rotatably attached to an outer peripheral surface of the second shaft member. .   The processing tank according to claim 9, wherein the first rotating body and the second rotating body are formed of an elastic member.

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