KR20220083116A - Processing control apparatus of machine tool and method thereof - Google Patents

Abstract

In the present invention, when processing a workpiece to be processed into a material in a triple eccentric shape on a two-axis machine tool such as a lathe or a two-axis machining center having a rotation axis of the material and a feed axis parallel and orthogonal to the rotation axis, the material is applied to the clamping part. In the state of being clamped without deflection, the material is automatically processed into a triple eccentric shape, and if necessary, additional arc processing is performed or compensation according to overcutting is automatically performed in real time to reduce processing time and cost, and to improve processing precision and To improve processing quality, improve processing productivity, reduce maintenance cost, improve safety and reliability of machine tools, and to promote operator convenience and safety, and a method for controlling the same .

Description

Processing control apparatus of machine tool and control method thereof

The present invention relates to a processing control apparatus for a machine tool and a control method thereof, and more particularly, by controlling the feed amount of a driving unit according to the processing shape of a workpiece to be processed into a material, the material is clamped without deflection in the clamping unit. It relates to a processing control apparatus for a machine tool capable of automatically performing processing, and a control method thereof.

In general, a machine tool refers to a machine used for the purpose of processing a metal/non-metal workpiece into a desired shape and size using an appropriate tool by various cutting or non-cutting methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door machining centers, Swiss turns, electric discharge machines, horizontal NC boring machines, and CNC lathes, are widely used in various industrial sites for their respective purposes.

In general, various types of machine tools currently used have an operation panel to which numerical control (NC) or computerized numerical control (CNC) technology is applied. Such an operation panel is provided with various function switches or buttons and a monitor.

In addition, the machine tool includes a table on which a workpiece material is seated and transferred for processing the workpiece, a pallet for preparing the workpiece before processing, a main shaft that a tool or workpiece is combined with and rotates, a tailstock for supporting the workpiece, etc. during processing, a vibration isolator etc. are provided.

In general, in a machine tool, a table, a tool rest, a main shaft, a tailstock, a vibration isolator, etc. are provided with a conveying unit conveying along a conveying axis in order to perform various machining.

In addition, in general, a machine tool uses a plurality of tools for various processing, and a tool magazine or a turret is used as a tool storage place for storing and storing a plurality of tools.

In addition, in general, a machine tool is provided with an automatic tool changer (ATC, Automatic Tool Changer) for withdrawing a specific tool from the tool magazine or receiving it again according to the command of the numerical control unit in order to improve the productivity of the machine tool.

In addition, in general, a machine tool is provided with an automatic pallet changer (APC, Automatic Palette Changer) in order to minimize the non-working time. The automatic pallet changer (APC) automatically exchanges pallets between the workpiece machining area and the workpiece installation area. Pallets may be loaded with workpieces.

In general, the workpiece can be processed to produce workpieces of various shapes with a two-axis machine tool such as a lathe or a machining center having a rotational axis of the workpiece capable of angular division and a linear feed shaft parallel and orthogonal to the rotational shaft.

In particular, today, as equipment is complicated and miniaturized and operated at high speed, processing of a material having a triple eccentric structure is required.

There is a triple eccentric valve in the shape of an eccentric elliptical cone as a representative product with a triple eccentric structure. That is, the triple eccentric structure means a structure in which the rotation axis of the disk is eccentric twice at the center of the valve, and has a conical contour forming a right-angled cone.

As shown in FIG. 1, through the processing control device and control method of a two-axis machine tool having a conventional angular divisionable material rotation axis (Z) and a linear feed axis (X axis) parallel and orthogonal to this rotation axis, the material ( In order to process 2) and process it into a workpiece having a triple eccentric structure, as shown in FIG. 1 , the material 2 should be installed to be biased in the clamping part 100 .

In other words, as the material must be clamped to the chuck or jig so that the center position and angle of the chuck or jig are deflected using a jig or wedge, it takes a lot of time to set up the material for clamping. There was a problem of this deterioration.

In addition, as the size and shape of the material or the processing shape of the workpiece to be processed with the material change in the conventional machine tool processing control apparatus and control method, a chuck, a jig, and a jig are separately provided and installed in a biased manner. There was a problem in that a lot of cost is required, it causes inconvenience to the operator, and there is a risk of personnel accidents occurring as the material is separated from the clamping part during material installation or processing.

Moreover, in the processing control apparatus and control method of the conventional machine tool, as the material reciprocates in the rotational axis (Z-axis) direction during machining, the life of the tool is reduced, thereby increasing the maintenance cost and maintenance time, and the processing precision is reduced. there was

In addition, the conventional machining control apparatus and control method of the machine tool has a problem in that the rotational balance is reduced, the machining quality is lowered, the safety and reliability of the machine tool is reduced.

Therefore, when processing a workpiece of a triple eccentric structure with a material by a two-axis machine tool such as a lathe or a two-axis machining center having a work axis of rotation (Z) and a linear feed axis (X axis) parallel and orthogonal to this axis of rotation There is an urgent need to develop a machining control device and a control method for a machine tool that can automatically, quickly, safely and precisely process a material in a state in which the material is clamped without bias in the clamping part.

Korean Patent Publication No. 10-2012-0085420 Korean Patent Publication No. 10-2019-0068858 Korean Patent Publication No. 10-2013-0086669

The present invention is to solve the above problems, and an object of the present invention is to process a material in a two-axis machine tool such as a lathe or a two-axis machining center having a rotation axis of the material and a feed axis parallel and orthogonal to the rotation axis. When processing a workpiece into a triple eccentric shape, the workpiece is automatically processed into a triple eccentric shape while the workpiece is clamped without deflection in the clamping part, and additional arc machining is performed as needed or compensation due to overcutting is automatically performed in real time to reduce machining time and cost, improve machining precision and machining quality, improve machining productivity, reduce maintenance costs, improve safety and reliability of machine tools, and promote operator convenience and safety. It relates to a processing control apparatus of a machine tool that can be used and a control method thereof.

In order to achieve the object of the present invention, the processing control apparatus of a machine tool according to the present invention includes a clamping unit for clamping a material; a processing unit for processing the material with a tool; a driving unit for driving a rotating shaft rotating the clamping unit and a conveying shaft moving linearly with respect to the rotating shaft; and a control unit for controlling the processing of the material; wherein the control unit controls the feed amount of the driving unit according to the processing shape of the workpiece to be processed into the material, so that the material is clamped without deflection by the clamping unit. processing can be performed automatically.

In addition, in another preferred embodiment of the processing control apparatus of the machine tool according to the present invention, the control unit of the processing control apparatus of the machine tool is the processing of the workpiece to be processed with the material in a state in which the material is clamped without deflection to the clamping portion. a memory unit for storing information for processing the material by controlling the transfer amount of the driving unit according to the shape; a selection unit for selecting a processing shape of a workpiece to be processed from the material; an option unit for determining whether to process a workpiece to be processed with the material as an option; and an operation unit configured to calculate the transfer amount of the driving unit according to the information stored in the memory unit, the selection result of the selection unit, and the option result of the option unit.

In addition, in another preferred embodiment of the processing control apparatus of the machine tool according to the present invention, the control unit of the processing control apparatus of the machine tool determines the over-cutting of the workpiece at the time of processing the material, and when the over-cutting occurs as a result of the determination, the It may further include a compensating unit for correcting the transfer amount of the driving unit.

In addition, in another preferred embodiment of the processing control apparatus of the machine tool according to the present invention, the memory unit of the control unit of the processing control apparatus of the machine tool is the processing shape of the workpiece to be processed as a material, a tool, a processing program, and a driving program a basic data storage unit for storing data; Data on the major axis length of the reference ellipse, the minor axis length of the reference ellipse, the X-axis deviation of the center line of the reference ellipse from the center line of the rotation axis, the cone angle, the angle between the center line of the cone and the center line of the rotation axis, and the Z-axis relative distance from the reference ellipse a processing shape data storage unit for storing; and spindle rotation speed, Z-axis movement speed per spindle rotation, Z-axis cutting range, Z-axis approach distance to the machining start surface, Z-axis departure distance from the machining finished surface, Z-axis machining direction, cone shape, and inner diameter machining/ It may include a; processing factor data storage for storing data for the outer diameter machining.

In addition, in another preferred embodiment of the processing control apparatus of the machine tool according to the present invention, the memory unit of the control unit of the processing control apparatus of the machine tool for the circular arc diameter, the circular arc processing start Z-axis position, and the circular arc processing end Z-axis position an optional data storage unit for storing data; a correction data storage unit for storing data on the tool blade radius and the angle between the center line of the rotation axis and the bevel surface of the tool and the material; and a real-time data storage unit configured to store the selection result of the selection unit, the option result of the option unit, the calculation result of the calculation unit, and the correction result of the correction unit in real time.

In addition, in another preferred embodiment of the processing control apparatus of the machine tool according to the present invention, the operation unit of the control unit of the processing control apparatus of the machine tool is a confirmation unit for confirming the clamping or unclamping state of the material; and a machining feed amount calculation unit for calculating the machining feed amount of the driving unit based on the data stored in the basic data storage unit, the machining shape data storage unit, and the machining factor data storage unit.

In addition, in another preferred embodiment of the processing control apparatus of the machine tool according to the present invention, the operation unit of the control unit of the processing control apparatus of the machine tool is the driving unit by the data stored in the basic data storage unit and the option data storage unit. an option feed amount calculation unit for calculating an option feed amount; and a correction amount calculation unit configured to calculate a correction amount of the machining feed amount and the optional feed amount based on the data stored in the basic data storage unit and the correction data storage unit.

In order to achieve another object of the present invention, the machining control method of a machine tool according to the present invention is a machining control method of a machine tool having two axes of a rotary shaft and a feed shaft moving linearly with respect to the rotary shaft, the processing of the material is performed storing data for selecting a processing shape of a workpiece to be processed from the material; checking the clamping or unclamping state of the material; and calculating the machining feed amount of the driving unit to perform machining of the work piece based on the selected machining shape and the stored data, wherein the work material is processed with the work material while the work material is clamped without deflection by the clamping unit The processing of the material may be performed according to the processing feed amount of the driving unit automatically calculated according to the shape.

In addition, in another preferred embodiment of the processing control method of the machine tool according to the present invention, the processing control apparatus method of the machine tool comprises the steps of: determining whether the optional processing of the workpiece to be processed with the material after the processing feed amount calculation step; The method may further include; calculating an optional feed amount of the driving unit to perform optional machining of the material based on the option result and the stored data.

In addition, in another preferred embodiment of the processing control method of the machine tool according to the present invention, the processing control apparatus method of the machine tool determines the over-cutting of the workpiece at the time of processing the material after the option feed amount calculation step, and the determination result and determining whether to proceed with correction of the feed amount of the driving unit when cutting occurs; calculating a correction amount of the machining feed amount and the optional feed amount based on the correction result and the stored data; and displaying the selection result, the option result, the machining feed amount, the option feed amount, the correction result, and the correction amount.

The processing control apparatus for a machine tool and a control method thereof according to the present invention include a workpiece processed as a material in a two-axis machine tool such as a lathe or a two-axis machining center having a rotation axis of a material and a feed axis parallel and orthogonal to the rotation axis. When processing with a triple eccentric shape, the workpiece is automatically processed into a triple eccentric shape while the workpiece is clamped without deflection in the clamping part, and additional arc machining is performed as necessary or compensation due to overcutting is automatically performed to reduce the size of the workpiece. It has the effect of minimizing the machining time and cost by reducing the set-up time, and maximizing the productivity of the machine tool according to the reduction of the non-machining time.

In addition, the processing control device for a machine tool and the control method thereof according to the present invention automatically process the material into a triple eccentric shape while the material is clamped without deflection to the clamping part when processing the workpiece to be processed into a triple eccentric shape. It has the effect of maximizing processing precision by performing additional circular option processing or correction according to over-cutting if necessary, and improving processing quality such as straightness and surface roughness according to stable processing.

Furthermore, the process control apparatus and control method of a machine tool according to the present invention minimizes tool wear and damage as the triple eccentric machining is performed while the material is installed in the clamping part without deflection, and the material clamped in the clamping part It has the effect of reducing the maintenance cost of the machine tool by preventing the fall or damage of the machine and promoting the convenience and safety of the operator by preventing safety accidents in advance.

In addition, the processing control apparatus and the control method for a machine tool according to the present invention automatically calculate the feed amount of the driving unit through the memory unit, the selection unit, the option unit, the calculation unit, and the correction unit of the control unit when processing the material in a triple eccentric shape It has the effect of maximizing customer satisfaction by automatically performing processing regardless of the processing shape and type.

1 shows a conceptual diagram of a state in which a material is coupled to a clamping part when processing a workpiece having a triple eccentric structure in a processing control apparatus and processing control method of a conventional machine tool.
Figure 2 shows a conceptual diagram of a state in which the material is coupled to the clamping part when processing the workpiece of the triple eccentric structure in the processing control apparatus and processing control method of the machine tool according to the present invention.
Figure 3 shows the configuration of the processing control apparatus of the machine tool according to the present invention.
Figure 4 shows the configuration of the control unit of the processing control device of the machine tool according to the present invention.
5 and 6 show a conceptual diagram for calculating a machining feed amount by conical machining when performing triple eccentric machining with the machine tool machining control apparatus and the control method according to the present invention.
7 shows a conceptual diagram for calculating an option feed amount to additionally perform optional machining during triple eccentric machining with the processing control apparatus and control method for a machine tool according to the present invention.
8 shows a conceptual diagram for calculating a corrected feed amount for correcting both the X-axis and the Z-axis during triple eccentric machining with the processing control apparatus and the control method for a machine tool according to the present invention.
9 shows a conceptual diagram for calculating a corrected feed amount for correcting only the X-axis during triple eccentric machining with the processing control apparatus and control method for a machine tool according to the present invention.
10 is a flowchart showing a process control method of a machine tool according to the present invention.

Hereinafter, with reference to the drawings of the processing control apparatus for a machine tool and a control method thereof according to an embodiment of the present invention will be described in detail. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers refer to like elements throughout.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

The terminology used herein is for the purpose of describing the embodiments, and thus is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprise" and/or "comprising" refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

Figure 2 shows a conceptual diagram of a state in which the material is coupled to the clamping unit when processing the work of the triple eccentric structure in the processing control apparatus and processing control method of the machine tool according to the present invention. Figure 3 shows a configuration diagram of the processing control device of the machine tool according to the present invention, Figure 4 shows the configuration diagram of the control unit of the processing control device of the machine tool according to the present invention. 5 and 6 show a conceptual diagram for calculating the machining feed amount by conical machining when performing triple eccentric machining with the machine tool machining control apparatus and control method thereof according to the present invention, and FIG. 7 is a machine tool according to the present invention. Shows a conceptual diagram for calculating an option feed amount to additionally perform optional machining during triple eccentric machining with a processing control device and control method thereof. 8 is a conceptual diagram for calculating the corrected feed amount for correcting both the X-axis and the Z-axis during triple eccentric machining with the processing control apparatus and control method for a machine tool according to the present invention, and FIG. 9 is a machine tool according to the present invention Shows a conceptual diagram for calculating the corrected feed amount that corrects only the X axis during triple eccentric machining with a processing control device and its control method. 10 is a flowchart showing a process control method of a machine tool according to the present invention.

Definitions of terms used below are as follows. The term "rotation axis" refers to a rotation axis on which an angle-divisionable material rotates, in the vertical direction in FIGS. 1, 2, 5 to 9, and the Z-axis direction in FIGS. 1, 2, 5, and 6 . "Transfer axis" means a transfer axis parallel and orthogonal to the axis of rotation, in the transverse direction in FIGS. 1, 2, 5 to 9, and in the X-axis direction in FIGS.

In addition, the triple eccentric structure refers to a structure having a conical contour in which the rotation axis of the disk is eccentric twice at the center of the valve like a triple eccentric valve having an eccentric elliptical cone shape, and forms a right-angled cone. In other words, when processing with a machine tool rather than a structure, from a processing point of view, the triple eccentric structure moves horizontally in the orthogonal direction to the central axis of the cone and tilts the central axis. will have

A processing control device 1 of a machine tool according to the present invention will be described with reference to FIGS. 2 to 9 . As shown in FIG. 3 , the processing control apparatus 1 of a machine tool according to the present invention includes a clamping unit 100 , a processing unit 200 , a driving unit 300 , and a control unit 400 .

The clamping unit 100 clamps the material. Such a clamping part may be formed of a jig or a chuck. In addition, it may be formed as a table if necessary.

The processing unit 200 processes the material with a tool by moving according to the feed amount of the driving unit. The processing unit 200 may be formed as a turret or spindle that accommodates a plurality of tools and can be divided into angles. In addition, in the processing control apparatus according to the present invention, the processing unit moves relative to the rotation axis along the feed axis. That is, a processing unit such as a tool or a turret having a tool holder can move relative to each other in various forms, such as moving forward or backward, elevating or rotating with respect to the rotation axis of the clamping unit to which the material is clamped along the feed axis. Accordingly, the material clamped in the clamping unit can be processed into various shapes and processed smoothly and quickly without eccentricity as will be described later.

The driving unit 300 drives the rotating shaft and the conveying shaft moving linearly with respect to the rotating shaft. That is, the driving unit 300 rotates the rotation axis (Z) of the material that can be divided into angles, and moves the transfer axis (X axis) that moves in a straight line while being parallel and orthogonal to the rotation axis. Specifically, the driving unit is connected to the clamping unit to rotate the clamping unit for clamping the material. The rotating shaft may be formed of a spindle of a machine tool, etc., and the conveying shaft may be formed of an LM guide, a ball screw, or the like. The driving unit may be formed of a servomotor for driving a rotating shaft such as a spindle and a ball screw.

The control unit 400 controls the processing of the material. That is, the control unit 400 controls the feed amount of the driving unit according to the processing shape such as the triple eccentric structure of the workpiece 3 to be processed into the material 2 to automatically process the material while the material is clamped without deflection to the clamping unit. do it with

The processing control device for a machine tool according to the present invention converts a workpiece to be processed as a material in a two-axis machine tool such as a lathe or a two-axis machining center having a rotation axis of a material and a feed axis parallel and orthogonal to the rotation axis to a triple eccentric shape. During machining, the material is processed into a triple eccentric shape while the material is clamped without deflection in the clamping part, and if necessary, additional arc machining is performed or compensation due to overcutting is automatically performed to reduce the set-up time of the material. It has the effect of minimizing time and processing cost, and maximizing the productivity of the machine tool according to the reduction of non-working time.

Although not shown in the drawings, the control unit of the machine tool according to the present invention includes a numerical control (NC) or computerized numerical control (CNC) and a programmable logic controller (PLC). Various numerical control programs are built-in in these NCs, CNCs and PLCs.

In addition, although not shown in the drawings, according to a preferred embodiment of the present invention, the control unit includes a main operation unit, and the main operation unit includes a screen display program and a data input program according to screen display selection, and the screen display According to the output of the program, a software switch is displayed on the display screen, and the ON/OFF of the software switch is recognized to give an input/output command for machine operation. In addition, although not necessarily limited thereto, the main operation unit includes a monitor that is installed on the housing, case, or one side of the machine tool to display various function switches or buttons and various information.

A programmable logic controller (PLC) performs communication according to a predetermined protocol with a driving unit, a clamping unit, a processing unit, and a control unit, and performs a function of executing a control command through such communication. That is, the PLC determines the feed amount of the clamping unit, the processing unit, the rotation shaft and the feed shaft of the driving unit according to the control of the control unit, and drives the driving unit.

Therefore, the processing control device of the machine tool according to the present invention prevents a malfunction when automatically processing the workpiece in a state in which the workpiece is clamped without bias in the clamping part when automatically processing a workpiece having a triple eccentric structure as a material, It can prevent damage or breakage of tools or other equipment due to malfunction, and improve user convenience.

As shown in FIG. 4 , the control unit 400 of the processing control apparatus for a machine tool according to the present invention includes a memory unit 410 , a selection unit 420 , an option unit 430 , an operation unit 440 , and a correction unit 450 . ), and/or a display unit 460 .

The memory unit 410 is a driving unit according to the machining shape of the work piece 3 finally produced by processing the material 2 through the tool of the machining unit 200 in a state in which the material 2 is clamped without deflection to the clamping unit 100 . By controlling the feed amount of 300, information for processing the material is stored. That is, an operator or a user may directly input data stored in the memory unit through the input unit. Such an input unit Human-Machine Interface (HMI) may be formed of various types of equipment having a program based on a user interface. The memory unit 720 may be various storage devices such as ROM, RAM, EPROM, flash drive, hard drive, etc., and may be web storage that performs a storage function of the memory unit on the Internet.

The selection unit 420 selects the processing shape of the workpiece 3 to be processed into the material 2 . That is, through the selection unit, the material is selected as a processing shape such as a triple eccentric structure or a general structure. Specifically, when the operator or the user selects the triple eccentric structure through the selection unit, cone processing is performed.

The option unit 430 determines whether or not an option processing of a workpiece to be processed into a material. That is, the option unit 430 determines whether or not to perform optional machining on whether to additionally perform circular arc machining in addition to cone machining when machining the triple eccentric structure through the selection section. Specifically, if additional machining is required in a round shape, such as chamfering, optional machining is performed.

The calculating unit 440 calculates the transfer amount of the driving unit according to the information stored in the memory unit, the selection result of the selection unit, and the option result of the option unit. That is, the calculating unit 440 calculates the machining feed amount with the machining feed amount calculation unit to be described later to perform conical machining according to the data stored in the memory unit and the selection of the triple eccentric structure or the general machining selection of the selection unit, and arc processing according to the option result of the option unit. In order to perform additional operation, the drive unit calculates the option feed amount in the option feed amount calculation unit. In addition, the calculation unit calculates the correction amount in the correction amount calculation unit to prevent overcutting according to the correction result of the correction unit.

The compensator 450 determines over-cutting of the workpiece during material processing, and corrects the feed amount of the driving unit when over-cutting occurs as a result of the determination. That is, when the correction unit 450 determines overcutting and performs correction, a corresponding signal is transmitted to the operation unit, and the correction amount is calculated through the correction amount calculation unit of the operation unit to be described later, and the processing or option feed amount is corrected. Option processing is performed.

The display unit 460 displays the selection result of the selection unit, the option result of the option unit, the processing feed amount, the option feed amount, the correction amount, and the correction result of the correction unit in the calculation unit in real time. The display unit 460 may include a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (Flexible Display). display), a three-dimensional display (3D display), and an electronic ink display (e-ink display) may include at least one. In addition, although not necessarily limited thereto, the display unit may be installed on the housing, case, or one side of the machine tool to display various function switches or buttons and various information.

As shown in FIG. 4 , the memory unit 410 of the control unit of the processing control device for a machine tool according to the present invention includes a basic data storage unit 411 , a processing shape data storage unit 412 , and a processing factor data storage unit 413 . ), an option data storage unit 414 , a correction data storage unit 415 , and/or a real-time data storage unit 416 .

The basic data storage unit 411 stores data on a machining shape of a workpiece to be processed into a material, a tool, a machining program, and a driving program. That is, it stores detailed information on the difference for each triple eccentric structure of the workpiece, the type of tool, the length and thickness of the tool, and the machining program and driving program for each machining shape.

Machining shape data storage unit 412 is the reference ellipse major axis length (a, mm), the reference ellipse minor axis length (b, mm), the X-axis deviation amount (r0) of the center line (A) of the reference ellipse from the center line (C) of the rotation axis , mm), cone angle (Øa, deg), angle (Øb, deg) between the center line of the cone (B) and the center line of the rotation axis (C), and data on the Z-axis relative distance from the reference ellipse (Zn, mm) save the Here, the reference ellipse is a cross-section of a cone cut in the XY plane at an arbitrary Z-axis position and becomes the processing reference plane. (The large ellipse in the lower solid line in FIG. 5)

The processing factor data storage unit 413 includes a spindle rotation speed (S, rev/mm), a Z-axis movement speed per one rotation of the spindle (Fz, mm/rev), a cutting range in the Z-axis direction (Zc, mm, that is, a machining start surface). to the machining finished surface)), the Z-axis approach distance to the machining start surface (Zc+, mm), the Z-axis departure distance from the machining finished surface (Zc-, mm), the Z-axis machining direction (by +1 or -1) Indicated), cone shape (defined as "+1" if the vertex of the cone is in the +Z direction relative to the base of the cone and "-1" if it is in the -Z direction), and inner diameter machining (I, indicated by -1)/ Stores data for external machining (denoted by O, +1).

The option data storage unit 414 stores data on the circular arc diameter (R, mm), the circular arc machining start Z-axis position (Zjs), and the circular arc machining end Z-axis position (Zje).

The correction data storage unit 415 stores data on the tool blade radius (Rt, mm) and the angle (Φd, deg) between the center line (C) of the rotation axis and the bevel (D) of the tool and the material.

The real-time data storage unit 416 stores the selection result of the selection unit, the option result of the option unit, the calculation result of the calculation unit, and the correction result of the correction unit in real time, and transmits the stored data to the display unit.

As shown in Figure 4, the calculation unit 440 of the control unit of the processing control apparatus of the machine tool according to the present invention is a confirmation unit 441, a machining feed amount calculation unit 442, an option feed amount calculation unit 443, and a correction amount calculation part 444 .

The confirmation unit 441 confirms the clamping or unclamping state of the clamping unit of the material. If the material is not clamped in the clamping part or is clamped biasedly, an alarm is generated or displayed on the display part.

The processing feed amount calculation unit 442 is a driving unit according to the processing shape of the workpiece to be processed into the material according to the data stored in the selection result of the selection unit and the confirmation result of the confirmation unit, the basic data storage unit, the processing shape data storage unit, and the processing factor data storage unit Calculate the machining feed of That is, the machining feed amount calculation unit calculates the machining feed amount of the driving unit in order to perform conical machining when the machining shape of the workpiece to be processed into the material is determined to be a triple eccentric structure.

That is, as shown in FIGS. 5 and 6 , the machining feed amount calculating unit calculates the machining feed amount of the driving unit by Equation 1 below. Specifically, basically, when calculating the machining feed amount through the machining feed amount calculator, the main shaft registers with the rotational speed (S) of the main shaft. In addition, the Z-axis coordinate is the Z-axis feed rate (Fz) per rotation of the main axis, and it moves at a constant speed according to the machining direction. Accordingly, the X-axis position (r) for calculating the machining feed amount with respect to the feed axis of the driving unit performing machining is calculated by Equation 1.

<Equation 1>

In this case, A in Equation 1 is calculated by Equation 2, B by Equation 3, C by Equation 4, δa by Equation 5, δb by Equation 6, δc by Equation 7, Øc is The angle between the straight line joining the center line (A) of the ellipse and the center line of the rotation axis is calculated by Equation 8 regarding Øb.

<Equation 2>

A = (a-δa) ²

<Equation 3>

B = (b-δb) ²

<Equation 4>

C = δc+ r0

<Equation 5>

<Equation 6>

<Equation 7>

<Equation 8>

a: the length of the major axis of the reference ellipse (mm),

b : Short axis length of the reference ellipse (mm)

r0: X-axis deviation (mm) of the center line (A) of the reference ellipse from the center line (C) of the rotation axis

Øa: cone angle (deg)

Øb : Angle (deg) between the center line of the cone (B) and the center line of the axis of rotation (C)

Øc : The angle (deg) between the straight line connecting the center line of the ellipse (A) and the center line of the rotation axis

δa : Change in length of long axis (mm) from the reference ellipse (Z=Z0) to Z-axis position change, and the sign is derived from the shape of the cone and the machining direction

δb : Change in the length of the minor axis according to the Z-axis position change from the reference ellipse (Z=Z0) (mm)

δc: Variation of the center point of the ellipse from the reference ellipse (Z=Z0) to the Z-axis position (mm)

Zn: Z-axis relative distance from the reference ellipse (mm)

wt: rotation angle of main shaft (deg)

S : Spindle rotation speed (rev/min)

Fz (mm/rev): Z-axis movement speed per 1 rotation of main shaft (mm/rev)

Zc: Z-axis cutting range (mm) (means the distance from the machining start surface to the machining finished surface)

Zc+ : Z-axis approach distance to the machining start surface (mm)

Zc-: Z-axis departure distance from the finished surface (mm)

Z-axis machining direction: displayed as +1 or -1

Conical shape: If the vertex of the cone is in the +Z-axis direction compared to the base of the cone, it is defined as "+1", and if it is in the -Z-axis direction, it is defined as "-1".

Internal machining (I): indicated by -1

External machining (O): marked as +1

The option transfer amount calculation unit 443 calculates the option transfer amount of the driving unit based on the data stored in the basic data storage unit and the option data storage unit when it is necessary to perform optional processing according to the option result of the option unit.

That is, as shown in FIG. 7 , the option transfer amount calculation unit calculates the option transfer amount of the driving unit by Equation 9 below. Specifically, basically, when machining the triple eccentric structure, the bevel angle of the cone continuously changes with one rotation of the main shaft according to the rotation angle of the main shaft. At this time, when circular arc processing is performed on the bevel part of the cone, the center point of the arc that is in contact with the bevel at the same Z-axis position changes according to the slope of the bevel. Accordingly, after processing is performed at the X-axis position calculated by the machining feed amount calculator, the X-axis position ( rj) according to Equation 1, the Z axis feeds at this speed of Fz per rotation, and the arc machining is performed in the range of Zn = Zjs to Zn = Zje (see Fig. 7). At this time, the position of the X axis of the contact point is It is calculated by Equation 9 below by substituting ZJ for Zn of 1, and the remaining variables are calculated by the auxiliary expression. In FIG. 7, O means outer diameter machining and I means inner diameter machining. The optional feed amount calculation unit is calculated using Equations 9 and 10.

<Equation 9>

<Auxiliary expression>

rj : X-axis position of arc and bevel contact

Zj : Z-axis position of arc and bevel contact

Ød : slope of slope

R : Circular diameter (mm)

O: Outer diameter (+1)

I : inner diameter (-1)

rjs : Circular machining start X-axis position

rje : Circular machining type X-axis position

Zjs : Circular machining start Z-axis position

Zje : Z-axis position at the end of circular processing

Accordingly, the X-axis coordinate rc on the arc at any Z-axis position z between Zjs and Zje is calculated by Equation 10.

<Equation 10>

The correction amount calculation unit 444 calculates the correction amount of the machining feed amount and the optional feed amount based on the data stored in the basic data storage unit and the correction data storage unit for correction when over-cutting occurs according to the correction result of the correction unit and correction is required. .

Basically, when machining a triple eccentric structure, the angle of bevel of the cone continuously changes with one rotation of the main shaft according to the rotation angle of the main shaft. At this time, the contact angle of the tool blade with the material bevel also changes accordingly. Since the tool blade is formed in the shape of a circular arc rather than an ideal point, overcutting (refer to G in FIG. 9 ) occurs depending on the angle of the bevel D, so a correction is required.

However, when compensating the machining feed amount and the optional feed amount in the compensation amount calculator, you can make corrections by moving the X and Z axes at the same time or by moving only the X axis. That is, in the case of correction by moving the X-axis and the Z-axis at the same time as in FIG. 8, the straightness and roughness are improved to improve the processing quality and processing reliability. Production and maintenance costs may increase. In addition, in the case of correcting by moving only the X-axis as shown in FIG. 9, the processing quality is lower than when correcting by moving the X-axis and the Z-axis at the same time. can reduce manufacturing and maintenance costs.

A correction principle for correcting the machining feed amount and the optional feed amount by the correction amount calculator will be described with reference to FIGS. 8 and 9 . In Figs. 8 and 9, H denotes the state before the tool position correction and the state after the tool position correction J.

That is, as shown in FIG. 8 , the correction amount calculation unit calculates the correction amount of the machining feed amount and the option feed amount when the X-axis and the Z-axis are moved at the same time to compensate. Specifically, the correction amount dx in the X-axis direction for correcting overcutting is calculated by Equation 11, and the correction amount dz in the Z-axis direction is calculated by Equation 12.

<Equation 11>

dx = Rt - Rt*cos(Ød)

<Equation 12>

dz = Rt*sin(Ød)

At this time, Ød is calculated by the following auxiliary formula.

<Secondary expression>

tan(Ød) = (r(360) - r(0)) / F

Rt : Radius of tool edge (mm)

Ød : The angle between the axis of rotation and the bevel of the tool and the workpiece

Therefore, if the X-axis position and Z-axis position after correction are +1 for external machining and -1 for internal machining, the X-axis position after correction is r + (signs according to the external and internal diameters) * dx, and the Z-axis position after correction is Zn - (sign according to the outer or inner diameter) * dz.

In addition, as shown in FIG. 9 , the correction amount calculation unit calculates the correction amount of the machining feed amount and the option feed amount when only the X-axis is moved to compensate. Specifically, the correction amount dx in the X-axis direction for correcting overcutting is calculated by Equation 13. In FIG. 9, G is an over-cutting area.

<Equation 13>

Rt : Radius of tool edge (mm)

Ød : The angle between the axis of rotation and the bevel of the tool and the workpiece

Therefore, the corrected position of the X-axis considering the angle of the bevel and the sign according to the inner/outer diameter is r + (sign according to the outer and inner diameter) * dx.

A processing control method of a machine tool according to the present invention will be described with reference to FIG. 10 . The processing control method of the machine tool according to the present invention includes a data storage step (S1), a selection step (S2), a confirmation step (S3), a machining feed amount calculation step (S4), an option determination step (S5), an option feed amount calculation step ( S6), a correction determination step S7, a correction amount calculation step S8, and a display step S9. The overall operating principle control method and equipment configuration of the machining control method of a machine tool according to the present invention are the same as the above-described machine tool machining control device according to the present invention, and the difference will be mainly described below.

In the processing control method of a machine tool having two axes of a rotation shaft and a feed shaft moving linearly with respect to the rotation axis, data for processing a workpiece according to a processing shape of a workpiece to be processed into a workpiece is stored. That is, basic data, processing shape data, processing factor data, option data, and correction data are stored in the data storage step (S1).

After the data storage step (S1), the processing shape of the workpiece to be processed into the material is selected. In other words, the shape of a cone is selected if it is a triple eccentric structure, a general structure, or a triple eccentric structure.

After the selection step (S2), the confirmation unit checks the clamping or unclamping state of the material. If the material is unclamped or biased and clamped by the clamping unit, an alarm is transmitted to the user or operator through a warning light, sound, or indication on the display unit.

After the confirmation step (S3), the machining feed amount of the driving unit is calculated in order to process the material according to the processing shape selected by the selection unit and the data stored in the memory unit. That is, the machining feed amount calculation unit calculates the machining feed amount by Equation 1.

After the machining feed amount calculation step (S4), it is determined through the option unit whether to process an option for the circular processing of the workpiece to be processed as a material.

After the option determination step (S5), the option feed amount calculation unit calculates the option feed amount of the driving unit by Equations 9 and 10 in order to perform the option processing of the material based on the option result of the option section and the data stored in the memory section.

After the optional feed amount calculation step (S6), over-cutting of the workpiece is determined during material processing, and when over-cutting occurs as a result of the determination, the correction unit determines whether or not to proceed with the correction of the feed amount of the driving unit. In addition, in the correction determining step, the compensator determines whether to correct the machining feed amount and the optional feed amount by moving both the X-axis and the Z-axis when determining the correction, or to move only about the X-axis.

After the correction determination step (S7), the correction amount of the machining feed amount and the option feed amount is calculated based on the correction result of the correction unit and the data stored in the memory unit. That is, in the case of compensating by moving both the X and Z axes for the machining feed amount and the optional feed amount according to the compensation result of the compensator, the X-axis compensation amount is calculated by Equation 11, and the Z-axis compensation amount is calculated by Equation 12. Also, in the case of compensating by moving only the X-axis for the machining feed amount and the optional feed amount according to the compensation result of the compensator, the X-axis compensation amount is calculated by Equation 13.

After the correction amount calculation step (S8), the selection result of the selection unit, the option result of the option unit, the machining feed amount according to the calculation of the machining feed amount calculation unit, the option feed amount according to the calculation of the option feed amount calculation unit, the correction result of the correction unit, and the calculation of the correction amount calculation unit The compensation amount is displayed on the display unit and the material is processed according to the machining feed rate of the driving unit automatically calculated according to the processing shape of the workpiece being processed with the material being clamped without deflection in the clamping unit.

Therefore, the processing control apparatus for a machine tool and its control method according to the present invention are processed into a material in a two-axis machine tool such as a lathe or a two-axis machining center having a rotation axis of a material and a feed axis parallel and orthogonal to the rotation axis. When processing a workpiece into a triple eccentric shape, the workpiece is automatically processed into a triple eccentric shape while the workpiece is clamped without deflection in the clamping part, and additional arc machining is performed as necessary or compensation due to overcutting is automatically performed. By reducing the set-up time of the material, the machining time and machining cost are minimized, and the productivity of the machine tool is maximized by reducing the non-working time. In the clamped state, the material is automatically processed into a triple eccentric shape, and if necessary, additional circular option processing or correction is performed according to overcutting. Minimizes tool wear and damage, reduces the maintenance cost of machine tools by preventing the material clamped in the clamping part from falling or breaking satisfaction can be maximized.

In the detailed description of the present invention described above, although it has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary knowledge in the art will It will be understood that various modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention. Accordingly, the technical scope of the present invention should not be limited to the content described in the detailed description of the specification, but should be defined by the claims.

1: Process control device
2: material
3: Workpiece
100: clamping part
200: processing unit
300: drive unit
400: control unit
410: memory unit
420: selection part
430: option part
440: arithmetic unit
450: correction unit
460: display

Claims (10)

a clamping unit for clamping the material;
a processing unit for processing the material with a tool;
a driving unit for driving a rotating shaft rotating the clamping unit and a conveying shaft moving linearly with respect to the rotating shaft; and
Including; a control unit for controlling the processing of the material;
The control unit controls the feed amount of the driving unit according to the processing shape of the workpiece to be processed from the material to automatically perform the processing of the material in a state in which the material is clamped without deflection by the clamping unit of a machine tool, characterized in that processing control.
According to claim 1,
The control unit is
a memory unit for storing information for processing the material by controlling the feed amount of the driving unit according to the processing shape of the workpiece to be processed with the material in a state in which the material is clamped without deflection by the clamping unit;
a selection unit for selecting a processing shape of a workpiece to be processed from the material;
an option unit for determining whether to process a workpiece to be processed with the material as an option; and
and an arithmetic unit for calculating the transfer amount of the driving unit according to the information stored in the memory unit, the selection result of the selection unit, and the option result of the option unit.
3. The method of claim 2,
The control unit is
The processing control apparatus of the machine tool further comprising; a correction unit for determining the over-cutting of the workpiece during the processing of the material, and correcting the feed amount of the driving unit when the over-cutting occurs as a result of the determination.
4. The method of claim 3,
The memory unit,
a basic data storage unit for storing data on a machining shape of a workpiece to be processed into a material, a tool, a machining program, and a driving program;
Data on the major axis length of the reference ellipse, the minor axis length of the reference ellipse, the X-axis deviation of the center line of the reference ellipse from the center line of the rotation axis, the cone angle, the angle between the center line of the cone and the center line of the rotation axis, and the Z-axis relative distance from the reference ellipse a processing shape data storage unit for storing; and
Spindle rotation speed, Z-axis movement speed per spindle rotation, Z-axis cutting range, Z-axis approach distance to the machining start surface, Z-axis departure distance from the machining finished surface, Z-axis machining direction, cone shape, and inner/outer diameter Processing control apparatus for a machine tool comprising a; processing factor data storage for storing data on processing.
5. The method of claim 4,
The memory unit,
an optional data storage unit for storing data on the arc diameter, the Z-axis position at the start of the arc machining, and the Z-axis position at the end of the arc machining;
a correction data storage unit for storing data on the tool edge radius and the angle between the center line of the rotation axis and the bevel surface of the tool and the material; and
and a real-time data storage unit configured to store the selection result of the selection unit, the option result of the option unit, the calculation result of the calculation unit, and the correction result of the correction unit in real time.
6. The method of claim 5,
The calculation unit,
a confirmation unit for confirming the clamping or unclamping state of the material; and
The machining control apparatus of a machine tool comprising a; .
7. The method of claim 6,
The calculation unit,
an option transfer amount calculation unit for calculating the option transfer amount of the driving unit based on the data stored in the basic data storage unit and the option data storage unit; and
and a correction amount calculation unit for calculating the correction amount of the machining feed amount and the optional feed amount based on the data stored in the basic data storage unit and the correction data storage unit.
In the processing control method of a machine tool having two axes of a rotary shaft and a feed shaft moving linearly with respect to the rotary shaft,
storing data for processing the material;
selecting a processing shape of a workpiece to be processed from the material;
checking the clamping or unclamping state of the material; and
Calculating the processing feed amount of the driving unit to perform processing of the material according to the selected processing shape and stored data;
Machining control of a machine tool, characterized in that, in a state in which the material is clamped without deflection by the clamping unit, the processing of the material is performed according to the processing feed amount of the driving unit automatically calculated according to the processing shape of the workpiece to be processed with the material Way.
9. The method of claim 8,
After the calculation of the processing feed amount,
Determining whether the optional processing of the workpiece to be processed from the material;
Calculating the optional feed amount of the driving unit to perform optional machining of the material based on the option result and the stored data;
10. The method of claim 9,
After the option transfer amount calculation step,
determining whether over-cutting of the workpiece is performed during the processing of the material, and determining whether to proceed with correction of the feed amount of the driving unit when over-cutting occurs as a result of the determination;
calculating a correction amount of the machining feed amount and the optional feed amount based on a correction result and stored data; and
and displaying the selection result, the option result, the machining feed amount, the option feed amount, the correction result, and the correction amount.

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