JP5813517B2 - Machining program generation device for wire electric discharge machine - Google Patents

Description

The present invention relates to a machining program generation device for a wire electric discharge machine that can attach a wire electrode component to an arbitrary region of a core and prevent a workpiece from falling.

Wire electric discharge machining, in which electric discharge machining performed by generating an electric discharge between electrodes formed between a machining electrode and a workpiece, is applied to a saw blade-like cutting process using a wire electrode for a plate-like workpiece, has been widely known and has become widespread. ing. In this wire electric discharge machining, a technique of adhering the wire electrode component to an arbitrary region of the core is employed in order to prevent the core forming the inner part of the workpiece cut by the machining groove during the machining. . Such a technique is disclosed in Patent Document 1 and Patent Document 2, for example.

Japanese Examined Patent Publication No. 61-041690 JP-A-62-218024

  By the way, in the case where the components of the wire electrode are attached in order to prevent the core from dropping as described above, it is necessary to set the area and the number to be attached as required. However, the area and number to which such wire electrode components are to be attached is set by the operator each time machining is performed while modifying the machining program based on the experience, and the work is extremely complicated. It becomes.

The present invention has been made in view of the above-described problems, and provides a machining program generation device for a wire electric discharge machine that can set the adhesion region of wire electrode components to a core without complicated operations. For the purpose.

To achieve the above object, the invention of claim 1 according to the machining program generating device of a wire electric discharge machine, the peripheral of the core forming the inner portion of which Ru workpiece severed by machining grooves in electric discharge machining is formed In a machining program generation device of a wire electric discharge machine that prevents the workpiece from falling by performing the electric discharge machining while adhering the wire electrode component to an arbitrary region of the length, generating the shape data of the core Core shape data generating means , storage means for storing first machining conditions for performing electric discharge machining for forming the machining grooves, and second machining conditions for attaching the components of the wire electrodes, and core shape data generating means A weight calculating means for calculating the weight of the core based on the shape data of the core generated by the above, and an adhesion area of the core based on the weight of the core calculated by the weight calculating means Generated by the attached area number calculating means for calculating the attached area, the attached area setting means for setting the attached area of the core based on the number of attached areas of the core calculated by the attached area number calculating means, and the core shape data generating means The wire electrode component is attached to the core attachment region based on the core shape data , the core attachment region set by the attachment region setting means , the first processing condition, and the second processing condition. And a machining program generating means for generating a machining program for performing electric discharge machining .

According to the present invention, by having each of the above means, it is possible to set the number of attached areas and the attached areas of the core while calculating the weight of the core based on the shape data of the core, and generate a machining program In addition, it is possible to set the adhesion region of the wire electrode component on the core without complicated operations.

Here, the storage means includes data indicating the correlation between the total adhesion length of the component of the wire electrode and the weight of the core in which the core does not fall during machining out of the circumference of the core, and one location of the adhesion region the deposition length of the core per remembers, attachment region number calculating means, attached length of the core per data point attachment regions 1 showing the correlation between the total coating length of the core weight and the core Then, the number of core attachment areas is calculated based on the weight of the core calculated by the weight calculation means, and the adhesion area setting means calculates the number of core adhesion areas calculated by the adhesion area number calculation means. Based on the weight of the core, the number of core adhesion areas can be calculated, and the core adhesion area can be calculated based on the number of core adhesion areas. Machining program is generated while setting the adhesion area of Rukoto can, it is possible to set the attachment region of the core to an appropriate position (claim 2).

Based on the non-attachment area setting means for setting the non-attachment area of the core to which the wire electrode component is not attached, and the non-attachment area of the core set by the non-attachment area setting means, it is set by the attachment area setting means. If there is an attachment changing means for changing the core attachment region, a region where the wire electrode component is difficult to adhere, such as a corner, is made a non-attachment region where the wire electrode component is not easily attached. (Claim 3).

For example, the adhesion changing means calculates the overlap distance between the adhesion area and the non-adhesion area, and changes the adhesion area of the core by shifting the overlap distance of the core set by the adhesion area setting means. (Claim 4).

According to the present invention, it is possible to set the adhesion region of the wire electrode component in the core without complicated operations.

It is a schematic diagram which shows the outline | summary of the whole structure in the wire electric discharge machine of this invention. It is a top view for demonstrating the adhesion method of the component of the wire electrode with respect to the core in this invention. It is a block diagram which shows the structure of the process program production | generation apparatus in a wire electric discharge machine. It is a flowchart for demonstrating the production | generation method of the machining program by a machining program production | generation apparatus. It is a block diagram which shows the structure of the processing program production | generation apparatus which concerns on 2nd Embodiment of this invention. It is a top view for demonstrating the adhesion method of the component of the wire electrode with respect to the core which concerns on the 2nd Embodiment. It is a top view following FIG. 6 for demonstrating the adhesion method of the component of the wire electrode with respect to the core which concerns on the 2nd Embodiment. It is a top view which expands and shows a part of FIG. 7 for demonstrating the adhesion method of the component of the wire electrode with respect to the core which concerns on the 2nd Embodiment. It is a top view following FIG. 7 and FIG. 8 for demonstrating the adhesion method of the component of the wire electrode with respect to the core which concerns on the 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
FIG. 1 is a diagram showing an outline of the entire configuration of a wire electric discharge machine 1 showing a first embodiment of the present invention. The outline of the wire electric discharge machine 1 will be described with reference to FIG. 1. The wire electric discharge machine 1 includes a brass wire electrode E as a tool electrode between the upper guide assembly 2 and the lower guide assembly 3. Are immersed in an aqueous processing liquid (hereinafter, the aqueous processing liquid is simply referred to as a processing liquid) in a state where the workpiece W is placed on the work stand 5 in the processing tank 4, and the wire is driven by each axis motor 6. While the distance between the electrodes E and the workpiece W is set to a predetermined value, a predetermined voltage is applied between the electrodes by the power supply device 7 to generate an electric discharge so that the electric discharge machining of the workpiece W is performed.

The wire electric discharge machine 1 includes an NC control device 10, and a predetermined control signal is generated while the machining program is decoded by the NC control device 10. That is, the wire electric discharge machine 1 operates each shaft motor 6 and the power supply device 7 on the basis of the control signal generated by the NC control device 10 to attach the brass component of the wire electrode E to an arbitrary portion of the core. Electric discharge machining can be performed.

A method of attaching the brass component to the core by the wire electric discharge machine 1 will be described as follows.
That is, as shown in FIG. 2, when the rectangular core A is formed on the flat workpiece W having a constant thickness, the center of gravity O of the core A is first obtained from the shape of the core A. In this case, the center of gravity O of the core A is the intersection of the diagonal lines α. And while calculating | requiring the total adhesion length of the brass component from which the core A does not fall during a process from the weight of the core A, the length per adhesion area is set and the number of adhesion areas is calculated | required. Subsequently, a line segment J that passes through the center of gravity O and forms an angle of 45 ° is drawn in more detail than an arbitrary line segment J that passes through the center of gravity O to obtain an intersection K between the line segment J and the outline O ′ of the core A. Next, the initial setting area C of the adhesion area B is set so that the intersection K is in the center. Then, another remaining adhesion region B is set from the initial setting region C at equal intervals of the circumference of the core A, and the brass component is adhered to the adhesion region B during processing.

In the present invention, a machining program generation device 20 is provided to generate a machining program so that the brass component of the core A can be attached during machining. As shown in FIG. 3, the machining program generation device 20 includes an input unit 30, a display unit 40, a storage unit 50, and a processing unit 60.

The input unit 30 includes, for example, a keyboard, a mouse, a touch panel, or the like, and information necessary for various processes in the processing unit 60 is input from the input unit 30. From the input means 30, for example, machining shape data of the workpiece W, that is, shape data of the core A and data 51, 52, 53 and information for reading the machining conditions 54, 55 stored in the storage means 50 are input. The input unit 30 includes a configuration for inputting various information from other devices via USB and LAN.

The display unit 40 is configured by a CRT display, a liquid crystal display, or the like, and displays information input from the input unit 30 or information processed by the processing unit 60. The display means 40 displays drawing information based on, for example, the shape data of the core A input by the operator via the input means 30.

The storage means 50 is composed of a hard disk, a CD-ROM, etc., and stores various data for attaching the brass component. The storage means 50 includes, for example, data 51 indicating a correlation between the weight of the core A and the total adhesion length of the brass component that the core A does not fall during processing, and the adhesion length of the core A per adhesion area. Length data 52 and density data 53 of the workpiece W are stored. The storage means 50 stores a first processing condition 54 when performing processing other than the adhesion region B, that is, normal processing, and a second processing condition 55 when attaching a brass component to the adhesion region B. .

The processing means 60 generates data for attaching the brass component based on the various information input from the input means 30 and the various data 51, 52, 53 and processing conditions 54, 55 stored in the storage means 50. However, in order to generate a machining program, storage data acquisition means 61, core shape data generation means 62, weight calculation means 63, adhesion area number calculation means 64, gravity center calculation means 65, adhesion area setting means 66, and machining program generation It functions as the means 67.

The storage data acquisition means 61 is based on the information input from the input means 30 and stores data 51 indicating the correlation between the weight of the core A and the total adhesion length from the storage means 50, and the core A per adhesion area. It has a function of reading out and acquiring the adhesion length data 52, the density data 53 of the workpiece W, and the processing conditions 54 and 55.

The core shape data generating unit 62 has a function of generating the shape data of the core A based on the information input from the input unit 30.
The weight calculation means 63 calculates the volume of the core A from the shape data of the core A generated by the core shape data generation means 62 and based on the density data 53 of the workpiece W acquired by the storage data acquisition means 61. And has a function of calculating the weight of the core A.

The adhesion area number calculation means 64 is based on the data 51 indicating the correlation between the weight of the core A acquired by the stored data acquisition means 61 and the total adhesion length and the weight of the core A calculated by the weight calculation means 63. Then, the total adhesion length is calculated, and the number of adhesion areas is calculated based on the adhesion length data 52 of the core A per adhesion area acquired by the storage data acquisition means 61.
The center of gravity calculating means 65 has a function of calculating the center of gravity O of the core A based on the shape data of the core A generated by the core shape data generating means 62.

The adhesion area setting means 66 sets the adhesion area B based on the number of adhesion areas calculated by the adhesion area number calculation means 64 and the centroid O calculated by the centroid calculation means 65. More specifically, the adhesion area setting means 66 obtains an intersection K between an arbitrary line segment J passing through the center of gravity O and the contour O ′ of the core A, and initially sets the adhesion area B so that the intersection K becomes the center. In addition to setting the area C, it has a function of setting other remaining adhesion areas B from the initial setting area C at equal intervals of the circumference of the core A.

The machining program generation unit 67 includes a first machining condition 54 and a second machining condition 55 acquired by the stored data acquisition unit 61, the shape data of the core A generated by the core shape data generation unit 62, and the adhesion region. It has a function of generating a machining program based on the adhesion region B set by the setting means 66. The processing means 60 performs its function in cooperation with the CPU and the memory.

Next, a machining program generation method by the machining program generation device 20 will be described in detail based on the flowchart of FIG.
First, in step S10, the operator inputs predetermined information from the input means 30, and based on the input information, the storage data acquisition means 61 correlates the weight of the core A and the total adhesion length from the storage means 50. Data 51 indicating the relationship, adhesion length data 52 of the core A per adhesion area, density data 53 of the workpiece W, and processing conditions 54 and 55 are read and acquired.

Next, in step S20, the operator inputs the shape data of the core A while being displayed on the display means 40 from the input means 30, and the core shape data generating means 62 is based on the input data. Generate shape data.
Next, in step S30, the weight calculating means 63 calculates the weight of the core A based on the density data 53 of the workpiece W acquired in step S10 and the shape data of the core A generated in step S20.

Subsequently, in step S40, the adhesion area number calculating means 64 receives the data 51 indicating the correlation between the weight of the core A and the total adhesion length input in step S10, and the adhesion length of the core A per adhesion area. The number of attached areas is calculated based on the weight data 52 and the weight of the core A calculated in step S30.
In step S50, the center-of-gravity calculating means 65 calculates the center of gravity O of the core A based on the shape data of the core A generated in step S20.

  Next, in step S60, the adhesion area setting means 66 sets an initial setting area C of the adhesion area B based on the number of adhesion areas calculated in step S40 and the center of gravity O of the core A calculated in step S50. Then, other remaining adhesion areas B are set at equal intervals from the initial setting area C.

Next, in step S70, the machining program generation means 67 is based on the machining conditions 54 and 55 acquired in step S10, the shape data of the core A generated in step S20, and the adhesion region B set in step S60. Then, the machining program is generated, and the operation by the machining program generation device 20 is terminated.

As described above, according to the first embodiment, since the machining program generation device 20 is provided, the core A adheres while calculating the weight of the core A based on the shape data of the core A. The number of areas and the adhesion area can be set, a machining program can be generated, and the adhesion area of the brass component of the wire electrode E can be set in the core A without complicated operations. As a result, human error can be reduced and labor costs can be reduced. Further, it is possible to reduce biting damage due to abnormal discharge of the workpiece W that occurs when the core A is cut off.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. As shown in FIG. 5, the second embodiment shows a configuration in which a non-attachment region setting unit 68 and an attachment changing unit 69 are added to the machining program generation device 20 with respect to the first embodiment described above. In addition, about the structure same as 1st Embodiment, the same code | symbol is attached | subjected and the description shall be abbreviate | omitted.

  That is, in the case where the brass attachment of the core A is performed, there are regions where it is difficult to attach the brass component such as a corner portion. In the second embodiment, as shown in FIG. The difficult region is operated by the operator as required by the operator, and the non-adhesion region setting unit 68 sets the difficult adhesion region as the non-adhesion region D where the brass component is not adhered. Then, as shown in FIG. 7, when the adhesion region B and the non-adhesion region D overlap, as shown in FIG. 8, an overlap region between the adhesion region B and the non-adhesion region D is obtained by the adhesion changing means 69. Thus, the start point L and the end point M in the processing direction of the overlap region are obtained, and the distance between the start point L and the end point M, that is, the overlap distance Δz is calculated. Next, as shown in FIG. 9, the attachment changing means 69 sets all the attachment regions B of the core A by shifting the overlap distance Δz along the processing direction so that the attachment region B and the non-attachment region D do not overlap. To do. When the overlap distance Δz is different in each overlap region, the overlap distance is set by shifting the maximum value Δzmax.

If the non-adhesion area setting means 68 and the adhesion changing means 69 are provided in this way, areas where it is difficult for the brass component of the wire electrode E to adhere, such as corners, are not easily adhered to the brass component of the wire electrode E. The adhesion area B can be set while setting the adhesion area D.

In addition, this invention is not limited to embodiment mentioned above, Of course, various application implementation or deformation | transformation implementation is possible as needed. That is, for example, in the embodiment described above, the machining fluid is an aqueous machining fluid, but the brass adhesion method of the present invention can also be implemented as an oil-based machining fluid. Moreover, the adhesion area B of the brass component is set at equal intervals from the initial setting area C to the circumference of the core, but when the thickness of the workpiece W changes, the interval according to the weight distribution, For example, the adhesion region B may be set so that the weight distribution is equally spaced.

The wire electric discharge machine of the present invention can prevent the core from dropping during machining, and contributes to a dramatic improvement in machining efficiency.

A: Core B: Adhering region C: Initial setting region D: Non-adhering region E: Wire electrode J: Line segment K: Intersection L: Overlapping region start point M: Overlapping region end point O: Center of gravity O ': Core outline W: Workpiece Δz: Overlap distance Δzmax: Maximum overlap distance α: Diagonal 1: Wire electric discharge machine 2: Upper guide assembly 3: Lower guide assembly 4: Processing tank 5: Workstand 6: Each axis motor 7: power supply device 10: NC control device 20: machining program generation device 30: input means 40: display means 50: storage means 51: data 52 indicating the correlation between the weight of the core and the total adhesion length 52: adhesion Adhesion length data 53 per region: workpiece density data 54: first machining condition 55: second machining condition 60: processing means 61: stored data acquisition means 62: core shape data generation means 63: weight Calculation means 64: Center of gravity calculation hand 65: attachment area speed calculation means 66: attachment area setting means 67: machining program generation means 68: non-attached region setting means 69: adhering changing means

Claims (4)

The discharge machining so as to perform the electric discharge machining while attaching the components of the wire electrode in any area of the circumference of the core forming the inner portion of which Ru workpiece severed by the processed groove is formed workpiece In the machining program generation device of the wire electric discharge machine to prevent the fall of
Core shape data generating means for generating the core shape data;
Storage means for storing a first machining condition for performing electric discharge machining for forming the machining groove and a second machining condition for attaching a component of the wire electrode;
Weight calculating means for calculating the weight of the core based on the shape data of the core generated by the core shape data generating means;
An adhesion area number calculating means for calculating the number of adhesion areas of the core based on the weight of the core calculated by the weight calculating means;
An adhesion area setting means for setting the adhesion area of the core based on the number of adhesion areas of the core calculated by the adhesion area number calculating means;
Based on the shape data of the core generated by the core shape data generation means , the adhesion area of the core set by the adhesion area setting means , the first machining condition, and the second machining condition. A machining program generating means for generating a machining program for performing electric discharge machining while adhering the component of the wire electrode to the adhesion region of the core ;
A machining program generation device for a wire electric discharge machine characterized by comprising: The storage means includes data indicating the correlation between the total adhesion length of the wire electrode component and the weight of the core in which the core does not fall during machining out of the circumference of the core and the adhesion area 1 the deposition length of the core per point remembers,
The adhesion area number calculation means includes data indicating a correlation between the weight of the core and the total adhesion length of the core, the adhesion length of the core per one adhesion area, and the weight calculation means. While calculating the number of adhesion areas of the core based on the calculated weight of the core,
The said adhesion area | region setting means sets the adhesion area | region of the said core at equal intervals based on the number of adhesion area | regions of the said core calculated by the said adhesion area number calculating means. A machining program generator for a wire electrical discharge machine. A non-adhesion region setting means for setting a non-adhesion region of the core that does not attach the component of the wire electrode;
Based on the non-adhesion area of the core set by the non-adhesion area setting means, an adhesion changing means for changing the adhesion area of the core set by the adhesion area setting means;
The machining program generation device for a wire electric discharge machine according to claim 2, wherein: The adhesion changing means calculates an overlapping distance between the adhesion area and the non-adhesion area, and shifts the adhesion area of the core set by the adhesion area setting means to shift the overlapping distance. The program generation device for a wire electric discharge machine according to claim 3, wherein:

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