JP2008016061A - Control method of multishaft multi-system nc lathe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control method of a multishaft multi-system NC lathe for controlling a section up to a multi-system finishing command from a multi-system starting command by a multi-system processing program, and controlling the other section by a single system processing program. <P>SOLUTION: This control method is constituted so as to be capable of switching to a control state of performing simultaneous processing and switching to a control state by the single system processing program from a control state of a multi-system processing program by the multi-system finishing command, in a plurality of control systems by the multi-system processing program composed of a processing program respectively corresponding to the plurality of control systems, from the control state by the single system processing program, by processing control and the multi-system starting command in only one control system by the single system processing program composed of the processing program corresponding to one control system for performing processing. The processing by one control system and the simultaneous processing by the plurality of control systems are performed by switching the control state on the basis of the multi-system starting command and the multi-system finishing command. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a control method for a multi-axis multi-system NC lathe.

The machining program for the multi-axis multi-system NC lathe is a group of machining programs for each system, and the multi-axis multi-system NC lathe is always controlled by the multi-system machining program (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. Sho 63-317807

  The purpose of the present invention is to control a multi-axis multi-system NC lathe from the multi-system start command to the multi-system end command in the multi-axis multi-system NC lathe machining program by the multi-system machining program. It is an object to provide a control method controlled by a single system machining program.

  In order to achieve the above object, the control method for a multi-axis multi-system NC lathe according to the present invention performs simultaneous machining in a plurality of control systems under the control of a multi-system machining program comprising machining programs corresponding to each of the plurality of control systems. In the control method of a multi-axis multi-system NC lathe capable of performing the above-mentioned multi-axis multi-system NC lathe with only one control system by a single system machining program consisting of a machining program corresponding to one control system for performing machining. Switching from a control state by a single system machining program to a control state by a multi-system machining program by machining control and a multi-system machining program, and control by a single system machining program from a control state by a multi-system machining program by a multi-system end command The system can be switched to a single system machining program, multi-system start command and multi-system end instruction. With a machining program in which a multi-system machining program sandwiched between the two is connected in series, machining by one control system and simultaneous machining by multiple control systems are converted into a multi-system start command and a multi-system end command. Based on this, the control state is executed while switching.

  By allowing the multi-system machining program to control only the necessary parts, the number of axis assignments to the system and the setting of coordinates, etc., can be reduced, making it possible to create machining programs that do not make the program creator aware of the system, making it easy to understand A control method for a multi-axis multi-system NC lathe can be provided.

  The best mode of the present invention will be described below with reference to the drawings.

  First, a simple mechanical configuration of a multi-axis multi-system NC lathe will be described with reference to FIG. This apparatus holds a plurality of tools 11 and moves a first tool post 10 that moves in the X1 axis direction, a plurality of tools 21 holds a second tool rest 20 that moves in the Z2 axis direction and the X2 axis direction, and a material 31. A spindle 30 that is gripped, rotated, and moved in the Z1 axis direction, mainly processing by rotation of the spindle 30, movement in the Z1 axis direction, and movement of the tool 11 held on the first tool post 10 in the X1 axis direction; Machining is performed by rotating the spindle 30, moving in the Z1 axis direction, and moving the tool 21 held on the second tool post 20 in the Z2 axis direction.

FIG. 4 shows an outline of simultaneous machining by the machining program examples of FIGS. 5 and 6 in terms of the locus of the cutting edge of the tool and the shape of the material after machining. The outer diameter cutting tool T12 selected from the plurality of tools 11 of the first tool post 10 is used to cut from the tip of the material 31 having a diameter of 10 mm to 10 mm to a diameter of 6 mm, and at the same time selected from the plurality of tools 21 of the second tool post 20 A drill having a depth of 5 mm was drilled from the tip of the material 31 with the drill T22, and then cut off with the cutting tool T13 selected from the plurality of tools 11 of the first tool post 10 to form the product 32.

  FIG. 1 and FIG. 2 are diagrams schematically showing display examples of machining programs written in series. FIG. 1 shows an example in which machining programs are displayed in series in one line. Since the multi-system control part 8, that is, the machining program parts to be executed simultaneously, are continuous and adjacent to each other, it is possible to easily recognize the time relation of the operation. FIG. 2 is an example in which a machining program is displayed in a plurality of lines in series. Note that 1 is a display screen of a multi-axis multi-system NC lathe, 2 is a machining program display range, 3 is a portion where the machining program is long and does not fit in the display range, 4 is a display empty portion, and 7 is a single-system control portion.

  FIG. 5 shows an example of a machining program. The left column is a command and the contents are simply shown on the right. Following the control by the single system machining program that executes the command of the next step after the operation by the command of each step is completed, the simultaneous operation control by the multi-system machining program sandwiched between the multi-system start command and the multi-system end command is performed. Furthermore, it is an example of a simple machining multi-system machining program including simultaneous machining performed continuously by a single system machining program. The contents of this multi-system machining program will be described in order.

  In the first single system machining program, the current Z1 axis coordinate position of the spindle 30 is set to -20.0, the chuck is opened, and the spindle 30 is moved to the Z1 axis coordinate position 0 at a feed rate of 5000 mm / min. It moves, waits for 0.5 seconds, and closes the chuck of the spindle 30. The coordinates were set by these, and the material was gripped in a form advanced by 20 mm. The main shaft 30 is retracted to the coordinate position 1.0 of the Z1 axis, and the distance from the cutting edge position of the tool 11 held on the first tool rest 10 to the end face of the material is set to 1 mm. The tool feed is set to a mode of every rotation feed, and the main spindle 30 is rotated forward at a rotational speed of 2500 rpm. The preparation of processing was performed by these.

  Next, in the multi-system machining program in the section from the multi-system start command G185 to the multi-system end command G186, the system command subsequent to the multi-system start command indicates that the subsequent commands are controlled by the system 1, and is controlled by the system 1 The axes are set as the Z1 axis and the X1 axis, the tool T12 of the first tool post 10 is selected, the cutting edge position of the tool T12 is set to the coordinate position 6.0 of the X1 axis, and the main shaft 30 is set to the coordinate position 0.5 of the Z1 axis. The spindle 30 is fed to the Z1 axis coordinate position 10.0 at a rotation speed of 0.05 mm per rotation until the Z1 axis coordinate position 10.0, and is sent to the X1 axis coordinate position 11.0 of the first tool post 10. The process up to this point is controlled by the system 1, and the material 31 having a diameter of 10 mm held by the main shaft 30 is cut to a diameter of 6 mm by a tool for outer diameter cutting up to 10 mm in the longitudinal direction.

  Subsequently, the second system command indicates that the subsequent commands are controlled by the system 2, the axes controlled by the system 2 are set as the Z2 axis and the X2 axis, the tool T22 of the second tool post 20 is selected, and this The coordinate position of the Z2 axis of the tool tip position of the tool T22 of the second tool post 20 at time 0 is set to 0, and this tooltip position is moved to the coordinate position -0.5 of the Z2 axis, and similarly to the coordinate position 5.0 of the Z2 axis. It is sent at a cutting feed of 0.08 mm per rotation, and the cutting edge position of the tool T22 is returned to the coordinate position −0.5 of the Z2 axis. The process up to this point is controlled by the system 2, and a hole having a depth of 5 mm is drilled in the material 31 having a diameter of 10 mm held by the main shaft 30 by these. The multi-system end command is executed after confirming the end of the final command of all systems. In a multi-system control section by this multi-system machining program, a system command and subsequent commands are simultaneously executed to perform simultaneous machining operations. Therefore, in this machining program example, the outer diameter cutting of the system 1 and the drilling of the system 2 are executed simultaneously.

In the next single system machining program, the tool T13 in the tool 11 held on the first tool post 10 is selected, the spindle 30 is moved to the coordinate position 20.0 of the Z1 axis, and the cutting edge position of the tool T13 is set to the X1 axis. Is sent at a speed of 0.03 mm / 1 rotation at a rotation speed of up to the coordinate position −3.0, and the rotation of the main shaft 30 is stopped, and the end processing is started. When the workpieces gripped and processed by the spindle 30 are cut off and made into products, the number of products is counted, one cycle is completed, and if the number of products has not reached the set value, the program returns to the top and reaches Exit the program.

  FIG. 6 shows another machining program example. Since the single system machining program section is the same as that of the embodiment of FIG. 5, the example of the multi-system machining program in the section of the multi-system start command and the multi-system end command is shown. Even in this section, only the system command is omitted from the first embodiment is the second embodiment, and therefore, this difference will be mainly described.

  Since the tool selection command is usually a macro program command, a system command to be executed only in the multi-system machining program in the section of the multi-system start command and multi-system end command is entered in advance in the macro program part, and there is a tool selection command And the system number preset in the system command and the axis to be controlled are set. Here, the control axes Z1 and X1 used for the machining operation of the first tool rest 10 set in advance by a tool selection command for selecting one of the tools 11 held on the first tool rest 10 are set to the first. Set to the control axis of the system. Further, in the tool selection command for selecting one of the tools T22 of the second tool post 20, the control axes Z2 and X2 used for the machining operation of the second tool post 20 set in advance are controlled by the second system. Set to axis. Then, the machining program after each tool selection command is simultaneously executed as a multi-system machining program, and after selecting an outer diameter cutting tool and a drill, respectively, a material 31 having a diameter of 10 mm held by the spindle 30 as in the first embodiment. The outer diameter cutting tool is used to cut a diameter of up to 10 mm to a diameter of 6 mm, and simultaneously drilling a 5 mm deep hole in the material 31 having a diameter of 10 mm held by the spindle 30. In this way, it is possible to create a multi-axis multi-system machining program without using system commands for the machining program creator and without being aware of multiple systems. In these embodiments, the machining program for the spindle-sliding NC lathe has been described. However, the machining program can be similarly applied to the spindle-fixed NC lathe. In addition, although two machining program examples have been described, the present invention can be similarly applied to a multi-system machining program having three or more systems. If the number of control axes is small and the number of simultaneous machining patterns is one or small, the machining program creator will be aware of the simultaneous machining if it is automatically set by the system command set in advance by the tool selection command. Even if there is, it is possible to create and edit programs without having multi-system awareness.

It is a figure which shows the example which described the machining program in embodiment of this invention in 1 line series. It is a figure which shows the example which described the machining program in embodiment of this invention in multiple lines in series. It is a figure showing an example of composition of a multi-axis multi-system NC lathe controlled by a processing program in an embodiment of the present invention. It is a figure which shows the example of a process in the process program in embodiment of this invention. It is a figure which shows the example of a process program. It is a figure which shows another example of a processing program.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display screen 2 Machining program display range 10 1st tool post 11 Tool 20 2nd tool post 21 Tool 30 Spindle 31 Material 32 Product

Claims (1)

In the control method of a multi-axis multi-system NC lathe capable of performing simultaneous machining in a plurality of control systems by control by a multi-system machining program consisting of machining programs corresponding to each of a plurality of control systems,
The multi-axis multi-system NC lathe is controlled by a single control system using a single system machining program consisting of a machining program corresponding to a single control system for performing machining, and a multi-system start command is issued. It is possible to switch from the control state by the multi-system machining program to the control state by the multi-system machining program, and from the control state by the multi-system machining program to the control state by the single system machining program by the multi-system machining command,
Machining by a single control system and simultaneous control by multiple control systems by a machining program in which a single system machining program and a multi-system machining program sandwiched between a multi-system start command and a multi-system end command are connected in series A control method for a multi-axis multi-system NC lathe that performs machining while switching control states based on a multi-system start command and a multi-system end command.

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