KR20230164277A - Machine tool soft jaw cutting device and processing method - Google Patents

Abstract

The present invention extracts the machining area of the soft jaw by inputting the three-dimensional shape information of the soft jaw, workpiece, and tool and the machining conditions of the soft jaw, and creates a machining program for the soft jaw using a machining template in the extracted machining area. By processing the soft jaw by applying the above processing program to the numerical control device of the machine tool, it is possible to create a processing program for processing the soft jaw and shorten the processing time for the soft jaw. Furthermore, it not only eliminates the operator's inconvenience caused by creating a soft jaw processing program, but also reduces the non-processing time of the machine tool.

Description

Machine tool soft jaw cutting device and processing method}

The present invention relates to a soft jaw for chucking a workpiece of a machine tool, and to a processing device and method for processing the soft jaw to fit the shape of the workpiece.

In general, machine tools such as NC lathes hold the workpiece in the jaws of a chuck, rotate the workpiece with the chuck and jaws, and allow the tool mounted on the tool rest to approach the workpiece to perform machining operations such as cutting. Perform.

The jaws for gripping the workpiece are generally installed in three separate structures so that they can move in the radial direction from the center of the rotation axis of the chuck, and are structured to grip the outer or inner diameter of the workpiece at the center of rotation. In some cases, these groups may consist of three or more.

These jaws are divided into hard jaws, whose shape is fixed with a material of high hardness, and soft jaws, which are made of a soft material with low hardness.

Since hard jaws are manufactured with a fixed shape from a hard material, when gripping a workpiece, the contact part of the jaw in contact with the workpiece does not have the same rotation radius as the workpiece, so the contact part between the jaw and the workpiece makes linear contact in the direction of the rotation axis of the jaw. This is formed.

Therefore, when a strong force is applied to the jaws to grip the workpiece, deformation or marks occur in the line contact area of the workpiece, causing damage to the workpiece. However, if the jaws grip the workpiece with weak force, the workpiece may come off during rotation or the position of the workpiece may change during machining, resulting in machining defects.

On the other hand, soft jaws are manufactured from soft materials, and the tread surface of the jaw in contact with the workpiece is processed to the same rotation radius as the gripping part of the workpiece being gripped, so that when gripping the workpiece, the tread surface of the jaw and the workpiece can make surface contact. This has the advantage that no damage or marks are left on the workpiece even when the workpiece is gripped with strong force.

However, for these soft jaws, the jaws must be machined in advance according to the shape of the workpiece to be gripped. The processing of these soft jaws is done by writing a complex machining program that NC machine tools can recognize, taking into account whether it is an external or internal gripping joint, the position of the jaws, and the shape of the workpiece, etc. to process the soft jaws, or by using an NC machine tool. The operator must manually operate the soft jaws to fit the shape of the workpiece to be gripped.

Therefore, there is an economic burden of having to use expensive commercial CAM (Computer Aided Manufacturing) software for soft jaw machining, and the productivity of workpiece machining work is reduced due to the separate work to create a soft jaw machining program. In addition, in order to process soft jaws manually, there are problems in that the worker has to process the soft jaws one by one, and it takes too much non-processing time for the workpiece.

Meanwhile, as one of the prior arts, Patent Document 1 is about a structure for mounting a soft jaw on a chuck. In terms of the part required to form the insertion hole of the soft jaw attachment member, the proportion of the entire soft jaw is small and the soft jaw is It relates to a configuration that can form many machining parts on the workpiece support surface.

In addition, Patent Document 2 relates to a jaw fixing device that is installed around the outside of the soft jaw and includes a ring with a plurality of threaded holes penetrated toward the center, and an adjustment screw fastened to the threaded hole, and the outer diameter of the soft jaw is It is a device that is fixed to enable precise processing when installed on a lathe.

These above-mentioned patent documents do not provide a solution for the processing equipment or processing method of soft jaws.

Korean Patent Publication No. 10-0429053 Korean Patent Publication No. 10-2009-0128157

The purpose of the present invention to solve the above problems is to automatically generate a soft jaw machining program using the shape information of the soft jaw, workpiece, and tool, thereby reducing the time required to create a soft jaw machining program and reducing the operator's inconvenience. The goal is to solve the problem and further increase the productivity of workpiece processing of machine tools.

The machine tool soft jaw processing device of the present invention to solve the above problems is,

In a machine tool in which a plurality of at least three soft jaws made of soft material are installed on a rotating chuck, divided radially from the center of rotation at an equal angle,

a shape information input unit for inputting shape information of the soft jaw, workpiece, and tool;

Processing of inputting the workpiece gripping depth (L, L') for gripping the workpiece in the soft jaw, the diameter (D, D') of the soft jaw for gripping the workpiece, and the inner diameter or outer diameter machining direction of the soft jaw. A condition input unit,

a machining area extractor that sets a machining area of the soft jaw according to shape information of the soft jaw and the workpiece and the machining conditions;

An interactive machining program writer that creates a machining program for machining the machining area according to the machining area extracted from the machining area extraction unit,

It includes a numerical control device for a machine tool that receives the soft jaw processing program created through the interactive processing program writer and controls processing of the soft jaw.

In a preferred embodiment, in the machine tool soft jaw processing apparatus, the shape information input unit, the processing condition input unit, the machining area extraction unit, and the interactive processing program writer are installed on a panel PC.

In a preferred embodiment, in the processing device of the machine tool soft jaw, the shape information input unit, the processing condition input unit, the processing area extraction unit, and the interactive processing program writer are characterized in that they are internalized in an open numerical control device. do.

In a preferred embodiment, in the machine tool soft jaw processing device, the shape information input to the shape information input unit includes three-dimensional shape information of the soft jaw before processing and three-dimensional shape information of the workpiece to be gripped by the soft jaw. Wow, this is the 3D shape information of the tool for processing the soft jaw,

The machining area extraction unit extracts the soft jaw input from the machining condition input unit on the premise that the soft jaw is moved in the center direction to grip a workpiece of a predetermined diameter with respect to the shape of the soft jaw input from the shape information input unit. Inward or outward based on the workpiece gripping depth (L, L'), the diameter (D, D') of the soft jaw, and the soft jaw diameter (D, D') depending on the processing direction of the soft jaw. The area is extracted as the machining area of the soft jaw, and the boundary surface of the machining area of the soft jaw is extracted as the machining profile,

The interactive machining program writer is characterized in that it creates the machining program based on the machining area and the machining profile data extracted from the machining area extractor.

In a preferred embodiment, in the machine tool soft jaw processing device, the shape information of the soft jaw is shape information including some virtual shape information in which each divided soft jaw is connected in the circumferential direction to form one cylindrical structure. It is characterized by

In a preferred embodiment, in the machine tool soft jaw processing device, the shape information input to the shape information input unit is input by recalling information pre-registered in a separately provided shape information database.

In a preferred embodiment, in the machine tool soft jaw processing device, the processing area is based on the diameter (D, D') of the soft jaw when the processing direction of the soft jaw is selected in the inner diameter direction in the processing condition input unit. If the inner area is set as the machining area and the machining direction of the soft jaw is selected as the outer diameter direction in the machining condition input section, the outer area is set as the machining area based on the diameter (D, D') of the soft jaw. It is characterized by

In a preferred embodiment, in the processing device for the soft jaw of the machine tool, when the machining direction of the soft jaw is selected as the inner diameter in the processing condition input unit, the processing area extraction unit extracts the workpiece gripping depth (L, L') of the soft jaw. Processing of the soft jaw by applying a Boolean operator corresponding to the end (AND) condition to set the overlapping area in the direction smaller than the diameter (D, D') of the soft jaw as the processing area of the soft jaw (11). When set to the area and the machining direction of the soft jaw is selected as the outer diameter in the processing condition input section, the workpiece gripping depth (L, L') of the soft jaw is larger than the diameter (D, D') of the soft jaw. It is characterized by applying a Boolean operator corresponding to an end (AND) condition to set the overlapping area in the direction as the processing area of the soft jaw 11.

In a preferred embodiment, in the processing device of the machine tool soft jaw, the interactive machining program writer processes the machining area in a machining template database prepared in advance based on the machining area and machining profile data extracted from the machining area extraction unit. A template is selected, machining process information of the machining area is extracted according to the application order of the selected machining template, and a machining program composed of G code is generated.

In addition, the processing method of the machine tool soft jaw of the present invention to solve the above problems is,

Three-dimensional shape information of the soft jaw divided into at least three pieces and placed at an equal angle in the circumferential direction on the machine tool chuck, three-dimensional shape information of the workpiece to be gripped by the soft jaw, and a tool for processing the soft jaw. Shape information input step (S10) of inputting three-dimensional shape information;

Processing of the soft jaws by selecting the gripping depth (L, L') of the soft jaws for gripping the workpiece, the diameter (D, D') of the soft jaws for gripping the workpiece, and whether to process in the inner or outer diameter direction. Processing condition setting step for inputting direction (S20);

Based on the shape information input in the shape information input step (S10) and the information input in the processing condition input step (S20), it is assumed that the soft jaw has moved in the direction of gripping a workpiece of a predetermined diameter. According to the processing direction of the inner diameter or outer diameter of the soft jaw set in the processing condition setting step (S20), the inner or outer area of the soft jaw diameter (D, D') is set as a processing area, and the processing area is Machining area extraction step (S30) of extracting the boundary surface as a machining profile;

Select a machining template for machining the machining area of the soft jaw from a machining template database prepared in advance based on the machining area and machining profile data extracted in the machining area extraction step (S30) through an interactive machining program writer, and select the machining template for machining the machining area of the soft jaw. A machining process information extraction step (S40) of extracting machining process information of the machining area according to the order of application of the machining template;

It includes a processing program creation step (S50) of generating a processing program using the processing process information extracted in the processing process information extraction step (S40).

In a preferred embodiment, in the processing method of the machine tool soft jaw, the shape information of the soft jaw input in the shape information input step (S10) is such that each soft jaw divided and installed at an equal angle on the chuck of the machine tool moves in the circumferential direction. It is characterized in that it is shape information that includes some virtual shape information that is connected to form one cylindrical structure.

In a preferred embodiment, in the processing method of the machine tool soft jaw, the shape information input in the shape information input step (S10) is characterized in that it is used by calling from information pre-registered in a separately provided shape information database. .

In a preferred embodiment, in the processing method of the machine tool soft jaw, the processing area extraction step (S30) is the diameter of the soft jaw when the processing direction of the soft jaw is selected as the inner diameter direction in the processing condition input step (S20). If the inner area is set as the machining area based on (D, D'), and the machining direction of the soft jaw is selected as the outer diameter direction, the outer area is machined based on the diameter (D, D') of the soft jaw. It is characterized by setting it as an area.

In a preferred embodiment, in the processing method of the soft jaw of the machine tool, the processing area is the workpiece gripping depth (L, L) of the soft jaw when the processing direction of the soft jaw is selected as the inner diameter in the processing condition input step (S20). '), a Boolean operator corresponding to the end (AND) condition is applied to the side smaller than the diameter (D, D') of the soft jaw, and the overlapping area is set as the processing area of the soft jaw, and the processing condition input step (S20) ), when the machining direction of the soft jaw is selected as the outer diameter, the workpiece gripping depth (L, L') of the soft jaw is larger than the diameter (D, D') of the soft jaw, which corresponds to the end (AND) condition. It is characterized by applying a Boolean operator to set the overlapping area as the processing area of the soft jaw.

In a preferred embodiment, the processing method of the machine tool soft jaw further includes a soft jaw processing step (S60) of processing the soft jaw by applying the processing program generated in the processing program generation step (S50) to a numerical control device. It is characterized by:

In a preferred embodiment, in the processing method of the machine tool soft jaw, the soft jaw processing step (S60) is performed by inserting a ring-shaped member with a preset diameter into the center of the rotation axis of the soft jaw so that the soft jaw grips the ring-shaped member. The soft jaw is moved toward the center of the rotation axis until the ring-shaped member is removed, and the soft jaw is processed according to the processing program created in the processing program creation step (S50).

In a preferred embodiment, in the processing method of the machine tool soft jaw, the ring-shaped member has a diameter smaller than or equal to the diameter of the workpiece to be gripped by the soft jaw.

The present invention eliminates the operator's inconvenience caused by creating a soft jaw processing program by automatically generating a processing program that can process soft jaws in advance using the shape information of the soft jaw, workpiece, and tool, and further improves machine tool processing. Non-processing time can be reduced.

Figure 1 is a partial perspective view of a machine tool equipped with soft jaws as an embodiment of the present invention.
Figure 2 is a schematic configuration diagram showing a soft jaw processing system as an embodiment of the present invention.
Figure 3 is an example of an input screen of the soft jaw processing condition input unit of a panel PC as an embodiment of the present invention.
Figure 4 is a conceptual diagram of extracting the machining area of a jaw that grips the outer diameter of a workpiece, as an embodiment of the present invention.
Figure 5 is a conceptual diagram of extracting the machining area of a jaw that grips the inner diameter of a workpiece, as an embodiment of the present invention.
Figure 6 is a conceptual diagram of setting a machining profile according to the machining area setting of a soft jaw as an embodiment of the present invention.
Figure 7 is a flowchart of the soft jaw processing method of the soft jaw processing system as an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 7.

As shown in FIG. 1, a machine tool equipped with soft jaws 11 includes three soft jaws made of soft material divided at an equal angle radially from the rotation center of the chuck 10 on the chuck 10 of the machine tool ( 11) is installed. Of course, the soft jaws 11 may be composed of three or more pieces depending on the circumstances of the machine tool.

This soft jaw (11) can be used by processing the tread surface in contact with the workpiece (12) according to the shape of the workpiece (12). Therefore, the soft jaw 11 is used by processing it so that the tread surface of the soft jaw 11 in contact with the workpiece 12 forms surface contact when gripping the workpiece 12.

The gripping surface of the workpiece 12 of the soft jaw 11 is processed on an NC machine tool by creating a processing program to have a rotation radius equal to the outer or inner diameter of the workpiece 12.

As shown in FIG. 2, the system for processing the soft jaw 11 using an NC machine tool includes the soft jaw 11, the workpiece 12, and the tool (11) on a panel PC 20. A shape information input unit 21 for inputting the shape information of 13), a processing condition input unit 23 for inputting the processing conditions of the soft jaw 11, and the shape information of the soft jaw 11 and the workpiece 12. It is equipped with a machining area extractor (24) that sets the machining area and machining profile of the soft jaw (11) according to machining conditions, and an interactive machining program writer (26) that creates a machining program for machining the machining area. , It is a structure that includes a numerical control device 30 of a machine tool that receives the processing program of the soft jaw 11 created through the interactive processing program writer 26 and controls processing of the soft jaw 11.

Meanwhile, the panel PC 20 is a type of personal computer, and the soft jaw 11 processing system of this embodiment does not necessarily need to consist of only the panel PC 20, and in some cases, a numerical control device of a machine tool ( 30) and can be internalized in a general PC that can write processing programs, or an open source CNC (30) that allows operators to write processing programs arbitrarily.

Meanwhile, the shape information input to the shape information input unit 21 includes three-dimensional shape information of the soft jaw 11 before processing and three-dimensional shape information of the workpiece 12 to be gripped by the soft jaw 11. Wow, this is also 3D shape information of the tool 13 that will process the soft jaw 11. Here, the shape information of the soft jaw 11 is some virtual shapes that are connected to each other to form one cylindrical structure, assuming that each divided soft jaw 11 grips a workpiece 12 with a predetermined diameter in the circumferential direction. It is shape information containing information.

Meanwhile, the shape information input to the shape information input unit 21 can be retrieved and used from information previously registered in the separately provided shape information database 22.

In addition, as shown in FIG. 3, the processing condition input unit 23 is information input for processing the soft jaw 11, and the workpiece is input from the tip of the soft jaw 11 in the direction of the rotation axis of the chuck 10. The gripping depth (L, L') of the workpiece (12) of the soft jaw (11) gripping (12), and the diameter (D, D') of the soft jaw (11) corresponding to the inner or outer diameter of the workpiece (12). And, when machining the soft jaw (11), enter the machining direction of the soft jaw (11) to select whether to machine in the inner diameter direction or the outer diameter direction. Here, the diameter (D, D') of the soft jaw (11) is the inner diameter (D, D') of the soft jaw (11) if the workpiece (12) to be gripped by the soft jaw (11) is an external machined workpiece (12). , and if the workpiece 12 to be gripped by the soft jaw 11 is an internal diameter machined workpiece 12, it means the outer diameter (D, D') of the soft jaw 11.

In addition, as shown in FIGS. 4 and 5, the machining area extraction unit 24 inputs the shape of the soft jaw 11 input from the shape information input unit 21 from the machining condition input unit 23. Extract the machining area according to the gripping depth (L, L') of the workpiece (12) of one soft jaw (11), the diameter (D, D') of the soft jaw (11), and the machining direction of the soft jaw (11). do.

That is, the machining area extraction unit 24 extracts the three-dimensional shape information of the jaw before machining input from the shape information input unit 21, the three-dimensional shape information of the workpiece 12 to be gripped by the jaw, and the machining Based on the diameter (D, D') of the soft jaw (11) entered in the condition input unit (23) and the gripping depth (L, L') of the workpiece (12) gripped by the soft jaw (11), the soft jaw (11) ) and the workpiece 12 are identified.

At this time, when the machining direction of the soft jaw 11 is selected as the inner diameter direction in the processing condition input unit 23, as shown in FIG. 4, the soft jaw 11 is moved in the center direction up to the preset diameter. Based on the diameter (D, D') of the soft jaw (11) entered in the processing condition input unit (23), the area of the soft jaw (11) that overlaps the workpiece (12) in the inward direction is set as the processing area.

In addition, when the processing direction of the soft jaw 11 is selected as the outer diameter direction in the processing condition input unit 23, as shown in FIG. 5, the soft jaw 11 is moved in the center direction up to a preset diameter. Based on the diameter (D, D') of the soft jaw (11) entered in the processing condition input unit (23), the area of the soft jaw (11) that overlaps the workpiece (12) in the outward direction is set as the processing area.

Meanwhile, the machining area extraction unit 24 extracts the area overlapping with the workpiece 12 in the inward or outward direction based on the diameter (D, D') of the soft jaw 11 as described above. ) is determined by a Boolean calculation method that is determined according to the selection of the inner or outer diameter machining direction of the soft jaw 11 entered in the machining condition input unit 23.

That is, when the machining direction of the soft jaw 11 is selected as the inner diameter in the processing condition input unit 23, the soft jaw 11 is Apply the Boolean operator corresponding to the end (AND) condition to set the overlapping area in the direction smaller than the diameter (D, D') as the processing area of the soft jaw (11).

In addition, when the machining direction of the soft jaw 11 is selected as the outer diameter in the processing condition input unit 23, the soft jaw 11 is Apply the Boolean operator corresponding to the end (AND) condition to set the overlapping area in the direction larger than the diameter (D, D') as the processing area of the soft jaw (11).

Meanwhile, as shown in FIG. 6, the machining area extraction unit 24 extracts the machining area boundary surface of the soft jaw 11 as a machining profile according to the machining area data set as above. The machining profile is used as data for creating a machining program, which will be described later.

In addition, the interactive machining program writer 26 creates a machining program based on the machining area and machining profile data extracted from the machining area extractor 24. This interactive machining program writer 26 processes the machining profile of the soft jaw 11 in the machining template database 25 prepared in advance based on the machining area and machining profile data extracted from the machining area extractor 24. A machining template is selected, and machining process information of the machining area is extracted according to the application order of the selected machining template.

In addition, the interactive machining program writer 26 automatically generates a machining program composed of G code through the interactive machining program writer 26 according to the extracted machining process information.

Meanwhile, the machining template is a type of small-scale machining program that preset the tool 13 and machining type that can be used when machining the machining area of the soft jaw 11 into the machining profile shape.

In addition, the numerical control device 30 rotates the chuck 10 on which the soft jaw 11 is mounted according to the processing program created from the interactive processing program writer 26, and at the same time, the chuck 10 mounted on the tool stand 13 The cutting tool (13) is brought close to the soft jaw (11) and controlled to automatically cut the machining area of the soft jaw (11).

Hereinafter, with reference to FIG. 7, the soft jaw 11 processing method of the soft jaw 11 processing device according to the configuration of the present embodiment will be described.

First, the shape information input step (S10) is executed.

In this step, the three-dimensional shape information of the soft jaw 11 in the state before processing in the shape information input unit 21, the three-dimensional shape information of the workpiece 12 to be gripped by the soft jaw 11, and the soft jaw 11 are input to the shape information input unit 21. This is the step of inputting the 3D shape information of the tool 13 that will process the jaw 11.

At this time, the shape information of the soft jaw (11) inputted is at least three soft jaws (11) divided into equal angles in the circumferential direction on the chuck (10) of the machine tool and movable in the direction of the rotation center of the chuck (10). ) is shape information that includes some virtual shapes that are connected to each other to form one cylindrical structure, assuming that the workpiece 12 of a predetermined diameter is held in the circumferential direction.

Meanwhile, the shape information input in the shape information input step (S10) can be retrieved and used from information previously registered in the separately provided shape information database 22.

Next, the processing condition setting step (S20) is executed.

This step is information for processing the soft jaw 11 input through the processing condition input unit 23, and as shown in Figures 3 to 6, the rotation axis of the chuck 10 from the tip of the soft jaw 11 The gripping depth (L, L') of the soft jaw (11) gripping the workpiece (12) in the direction and the diameter (D, D') and the machining direction of the soft jaw (11), which selects whether to machine in the inner diameter direction or the outer diameter direction when machining the soft jaw (11). Here, the diameter (D, D') of the soft jaw (11) is the inner diameter (D, D') of the soft jaw (11) if the workpiece (12) to be gripped by the soft jaw (11) is an external machined workpiece (12). , and if the workpiece 12 to be gripped by the soft jaw 11 is an internal diameter machined workpiece 12, it means the outer diameter (D, D') of the soft jaw 11.

Next, the processing area extraction step (S30) is executed.

The three-dimensional shape information of the soft jaw 11 in the state before processing input in the shape information input step (S10), the three-dimensional shape information of the workpiece 12 to be gripped by the jaw, and the processing condition input step (S20) ) Based on the diameter (D, D') of the soft jaw (11) and the gripping depth (L, L') of the workpiece (12) gripped by the soft jaw (11), the soft jaw (11) and the workpiece ( 12) Identify the overlapping parts.

At this time, the overlapping portion of the soft jaw 11 and the workpiece 12 is the machining area, assuming that the soft jaw 11 grips the workpiece 12 of a predetermined diameter and is moved in the direction of the center of rotation. Identify.

In addition, at this time, when the processing direction of the soft jaw 11 is selected as the inner diameter direction in the processing condition input step (S20), as shown in FIG. 4, the soft jaw 11 entered in the processing condition input step (S20) ), the area overlapping with the workpiece 12 in the inward direction is set as the machining area based on the diameters (D, D') of When selected, as shown in FIG. 5, the area overlapping with the workpiece 12 in the outward direction based on the diameter (D, D') of the soft jaw 11 entered in the processing condition input step (S20). Set as the processing area.

Meanwhile, in the machining area extraction step (S30), setting the overlapping area with the workpiece 12 in the inward or outward direction based on the diameter (D, D') of the soft jaw 11 as the machining area is, It is determined according to the selection of the inner diameter or outer diameter processing direction of the soft jaw 11 entered in the processing condition input step (S20) using the Boolean calculation method.

That is, in the Boolean calculation method, when the processing direction of the soft jaw 11 is selected as the inner diameter in the processing condition input step (S20), the gripping depth (L, Apply a Boolean operator corresponding to the end (AND) condition to set the overlapping area in L') in the direction smaller than the diameter (D, D') of the soft jaw 11 as the processing area of the soft jaw 11. do.

On the other hand, when the processing direction of the soft jaw (11) is selected as the outer diameter in the processing condition input step (S20), the soft jaw (11) is Apply the Boolean operator corresponding to the end (AND) condition to set the overlapping area in the direction larger than the diameter (D, D') of ) as the processing area of the soft jaw (11).

In addition, in the machining area extraction step (S30), as shown in FIG. 6, the machining area boundary surface of the soft jaw 11 is extracted as a machining profile according to the machining area data set as above.

Next, the processing process information extraction step (S40) is performed.

In this step, the machining area of the soft jaw (11) is extracted from the machining template database (25) prepared in advance based on the machining area and machining profile data extracted in the machining area extraction step (S30) through the interactive machining program writer (26). Select a machining template to process the machining profile, and extract machining process information of the machining area according to the application order of the selected machining template.

Next, the processing program creation step (S50) is executed.

In this step, a machining program is automatically created using G code corresponding to the machining process information extracted in the machining process information extraction step (S40) through the interactive machining program writer 26.

Next, the soft jaw 11 processing step (S60) is performed.

This step is to process the soft jaw 11 by applying the processing program generated in the processing program creation step (S50) to the numerical control device 30. Before processing the soft jaw 11, first By inserting a ring-shaped member with a preset diameter into the center of the rotation axis of the jaw (11), the soft jaw (11) is moved in the direction of the center of the rotation axis until the soft jaw (11) grips the ring-shaped member, Move to an area that can be processed.

Afterwards, the ring-shaped member held in the soft jaw 11 is removed, and the chuck 10 on which the soft jaw 11 is mounted is rotated according to the processing program created in the processing program creation step (S50), and at the same time, the tool 13 ) The cutting tool 13 mounted on the stand approaches the soft jaw 11 to cut the machining area of the soft jaw 11 extracted in the machining area extraction step (S30).

Meanwhile, at this stage, prior to processing the soft jaw 11, the ring-shaped member inserted and held at the center of the rotation axis of the soft jaw 11 is used to determine the processing start position of the soft jaw 11, and is deformable. It is a thin member, and its diameter is smaller than or equal to the diameter of the workpiece (12) to be gripped by the soft jaw (11).

As explained through the above embodiment, the present invention automatically creates a processing program that can process the soft jaw 11 in advance using the shape information of the soft jaw 11, the workpiece 12, and the tool 13. By creating the soft jaw (11), it is possible to eliminate the operator's inconvenience caused by creating a processing program and further reduce the non-processing time of the machine tool.

10 ships
11 soft jaw
12 workpiece
13 tools
20 panel PC
21 Shape information input unit
22 Shape information database
23 Processing condition input section
24 Processing area extraction unit
25 processing template database
26 Interactive processing program creator
30 Numerical control device
S10 shape information input step
S20 processing conditions setting step
S30 processing area extraction step
S40 processing process information extraction step
S50 processing program creation stage
S60 soft jaw processing steps

Claims (17)

In a machine tool in which a plurality of at least three soft jaws made of soft material are installed on a rotating chuck, divided radially from the center of rotation at an equal angle,
a shape information input unit for inputting shape information of the soft jaw, workpiece, and tool;
Processing of inputting the workpiece gripping depth (L, L') for gripping the workpiece in the soft jaw, the diameter (D, D') of the soft jaw for gripping the workpiece, and the inner diameter or outer diameter machining direction of the soft jaw. A condition input unit,
a machining area extractor that sets a machining area of the soft jaw according to shape information of the soft jaw and the workpiece and the machining conditions;
An interactive machining program writer that creates a machining program for machining the machining area according to the machining area extracted from the machining area extraction unit,
A machine tool soft jaw processing device comprising a numerical control device for a machine tool that receives the soft jaw processing program created through the interactive processing program writer and controls processing of the soft jaw. The processing device of claim 1, wherein the shape information input unit, the machining condition input unit, the machining area extractor, and the interactive machining program writer are installed on a panel PC. The processing device of claim 1, wherein the shape information input unit, the machining condition input unit, the machining area extractor, and the interactive machining program writer are internalized in an open numerical control device. . The method of claim 1, wherein the shape information input to the shape information input unit includes 3-dimensional shape information of the soft jaw before processing, 3-dimensional shape information of the workpiece to be gripped by the soft jaw, and the shape information for processing the soft jaw. It is the 3D shape information of the tool,
The machining area extraction unit extracts the soft jaw input from the machining condition input unit on the premise that the soft jaw is moved in the center direction to grip a workpiece of a predetermined diameter with respect to the shape of the soft jaw input from the shape information input unit. Inward or outward based on the workpiece gripping depth (L, L'), the diameter (D, D') of the soft jaw, and the soft jaw diameter (D, D') depending on the processing direction of the soft jaw. The area is extracted as the machining area of the soft jaw, and the boundary surface of the machining area of the soft jaw is extracted as the machining profile,
The interactive machining program writer is a machining device for machine tool soft jaws, characterized in that the machining program is created based on the machining area and the machining profile data extracted from the machining area extraction unit. The machine tool soft jaw of claim 4, wherein the shape information of the soft jaw is shape information including some virtual shape information where each divided soft jaw is connected in the circumferential direction to form one cylindrical structure. processing equipment. The processing device of claim 4, wherein the shape information input to the shape information input unit is retrieved from information pre-registered in a separately provided shape information database. The method of claim 4, wherein when the machining direction of the soft jaw is selected as the inner diameter direction in the machining condition input unit, the inner area is set as the machining area based on the diameter (D, D') of the soft jaw. , When the processing direction of the soft jaw is selected as the outer diameter direction in the processing condition input unit, the outer area is set as the processing area based on the diameter (D, D') of the soft jaw. Machine tool soft jaw. processing equipment. The method of claim 4, wherein when the machining direction of the soft jaw is selected as the inner diameter in the machining condition input unit, the machining area extractor calculates the diameter (D, D') A Boolean operator corresponding to the end (AND) condition is applied to set the overlapping area in the smaller direction as the processing area of the soft jaw 11, and the processing conditions are set as the processing area of the soft jaw. When the machining direction of the soft jaw is selected as the outer diameter in the input unit, the overlapping area in the direction larger than the diameter (D, D') of the soft jaw in the workpiece gripping depth (L, L') of the soft jaw is selected as the soft jaw. A processing device for machine tool soft jaws, characterized in that the processing area of the soft jaw is set by applying a Boolean operator corresponding to the end (AND) condition to set the processing area of (11). The method of claim 4, wherein the interactive machining program writer selects a machining template for machining the machining area from a machining template database prepared in advance based on the machining area and machining profile data extracted from the machining area extractor, and processes the selected machining area. A processing device for machine tool soft jaws, characterized in that it extracts machining process information of the machining area according to the order of application of the template and generates a machining program composed of G code. Three-dimensional shape information of the soft jaw divided into at least three pieces and placed at an equal angle in the circumferential direction on the machine tool chuck, three-dimensional shape information of the workpiece to be gripped by the soft jaw, and a tool for processing the soft jaw. Shape information input step (S10) of inputting three-dimensional shape information;
Processing of the soft jaws by selecting the gripping depth (L, L') of the soft jaws for gripping the workpiece, the diameter (D, D') of the soft jaws for gripping the workpiece, and whether to process in the inner or outer diameter direction. Processing condition setting step for inputting direction (S20);
Based on the shape information input in the shape information input step (S10) and the information input in the processing condition input step (S20), the soft jaw moves in the direction of gripping a workpiece of a predetermined diameter. As a premise, the area inside or outside the soft jaw diameter (D, D') is set as a processing area according to the processing direction of the inner or outer diameter of the soft jaw set in the processing condition setting step (S20), and the processing area is A machining area extraction step (S30) of extracting the boundary surface as a machining profile;
Select a machining template for machining the machining area of the soft jaw from a machining template database prepared in advance based on the machining area and machining profile data extracted in the machining area extraction step (S30) through an interactive machining program writer, and select the machining template for machining the machining area of the soft jaw. A machining process information extraction step (S40) of extracting machining process information of the machining area according to the order of application of the machining template;
A processing method of a machine tool soft jaw including a processing program creation step (S50) of generating a processing program with the processing process information extracted in the processing process information extraction step (S40). The method of claim 10, wherein the shape information of the soft jaw input in the shape information input step (S10) is such that each soft jaw that is divided and installed at an equal angle on the chuck of the machine tool is connected in the circumferential direction to form one cylindrical structure. A processing method of machine tool soft jaws, characterized in that the shape information includes some virtual shape information. The method of claim 10, wherein the shape information input in the shape information input step (S10) is retrieved and used from information previously registered in a separately provided shape information database. The method of claim 10, wherein the processing area extraction step (S30) is based on the diameter (D, D') of the soft jaw when the processing direction of the soft jaw is selected as the inner diameter direction in the processing condition input step (S20). The inner area is set as the machining area, and when the machining direction of the soft jaw is selected as the outer diameter direction, the outer area is set as the machining area based on the diameter (D, D') of the soft jaw. Processing method of machine tool soft jaws. The method of claim 13, wherein the machining area is the diameter of the soft jaw at the workpiece gripping depth (L, L') of the soft jaw when the machining direction of the soft jaw is selected as the inner diameter in the processing condition input step (S20). By applying the Boolean operator corresponding to the end (AND) condition to the side smaller than (D, D'), the overlapping area is set as the machining area of the soft jaw, and the machining direction of the soft jaw is set in the machining condition input step (S20). If is selected as the outer diameter, the overlapping area is created by applying the Boolean operator corresponding to the end (AND) condition from the workpiece gripping depth (L, L') of the soft jaw to the larger side than the diameter (D, D') of the soft jaw. A processing method of machine tool soft jaws, characterized in that set as the processing area of the soft jaws. The machine tool software of claim 10, further comprising a soft jaw machining step (S60) of processing the soft jaw by applying the machining program generated in the machining program generation step (S50) to a numerical control device. Jaw processing method. The method of claim 15, wherein the soft jaw processing step (S60) involves inserting a ring-shaped member with a preset diameter into the center of the rotation axis of the soft jaw and rotating the soft jaw until the soft jaw grips the ring-shaped member. A processing method of a machine tool soft jaw, characterized in that the ring-shaped member is removed after moving in the center direction and the soft jaw is processed according to the processing program created in the processing program creation step (S50). The method of claim 16, wherein the ring-shaped member has a diameter smaller than or equal to the diameter of the workpiece to be gripped by the soft jaws.