JP2013206331A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine tool including an input/output substrate in which a low voltage component such as a connector can be disposed across the whole peripheral part, and a substrate surface can be validly used, and the input/output of a signal can be efficiently performed.SOLUTION: A control device 81 of a machine tool includes: an AVR (Automatic Voltage Regulator) for reducing a power supply voltage; a control board 94 for controlling the driving of each device of the machine tool; an input/output substrate 93 for inputting/outputting a signal between devices in the control board 94 and a control device 81; and a protection device 95 for protecting the control board 94 and the input/output substrate 93 from excess currents. The power supply voltage is input via the protection device to the AVR. A voltage detection cable 96 to which the power supply voltage is input from the protection device 95 is connected to the position isolated from the edge part of the input/output substrate 93 by a predetermined distance. The input/output substrate 93 includes a power supply voltage monitoring circuit 932 for monitoring the power supply voltage input to the protection device 95.

Description

  The present invention relates to a machine tool including a processing device that processes a workpiece (workpiece) and a control device having a control unit that controls the processing device.

The machine tool includes a processing device that processes a workpiece and a control device that controls the processing device. When the control device controls the machining device, the workpiece is machined by the machining device. For example, a 200V power supply voltage is input to the control device. The control device usually includes an AVR (Automatic Voltage Regulator) that converts the power supply voltage into a 24V system or a 12V system, a control board that controls driving of each device of the machine tool, and between the control board and each device in the control device. An input / output board for inputting / outputting the above signal and a protection device for protecting the control board and the input / output board from overcurrent. The power supply voltage is input to the AVR through the protection device. The input / output board and the protection device are connected by a voltage detection cable, and the input / output board has a power supply voltage monitoring circuit that monitors the power supply voltage input to the protection device (see, for example, Patent Document 1).
When the power supply voltage monitoring circuit captures the power supply voltage input to the control device with a voltage detection cable every predetermined time, determines whether or not the voltage value is within a predetermined threshold, and determines that it is not within the predetermined threshold The predetermined power outage program is started.

Japanese Patent Laid-Open No. 07-072185

FIG. 10 is a schematic diagram of a conventional input / output substrate 93.
As shown in FIG. 10, the input / output substrate 93 includes a substrate 931, a power supply voltage monitoring circuit unit 932 mounted with a 200 V power supply voltage monitoring circuit provided along one short side of the substrate 931, and the substrate 931. A plurality of connectors 933 provided at the peripheral edge. The power supply voltage monitoring circuit unit 932 receives the power supply voltage from the protection device through the voltage detection cable 96. The voltage detection cable 96 needs to be grounded. The voltage detection cable 96 is attached to one short side (end edge) of the substrate 931, and a substrate edge spacer 150 is provided at this attachment position, and is grounded via the substrate edge spacer 150. It was.
As described above, the power supply voltage monitoring circuit unit 932 needs to be provided along one short side of the input / output board 93, and the low voltage component needs to be provided approximately 2 to 3 mm away from the voltage detection cable 96. In combination, the short side of the substrate 931 has a problem that a low voltage component such as a connector 933 cannot be provided.

  The present invention has been made in view of such circumstances, and low voltage components such as connectors can be provided over the entire periphery, the substrate surface can be used effectively, and signal input / output can be performed efficiently. An object of the present invention is to provide a machine tool including an input / output substrate that can be performed.

  A machine tool according to a first aspect of the present invention is an input / output board having a processing device for processing a workpiece, a control unit for controlling the processing device, and a circuit for inputting and outputting a signal to which a voltage obtained by stepping down a power supply voltage is input. And a control device having a protection unit that receives power supply voltage and protects the circuit from overcurrent, the input / output board and the protection part are connected by an electric wire, and the input / output board monitors the power supply voltage. The electric wire is hold | maintained at parts other than the edge part of the said input-output board | substrate.

  In the present invention, since the electric wires are held at portions other than the end portions of the input / output board, a large number of low voltage components such as connectors can be provided over the entire peripheral edge portion of the input / output board.

  A machine tool according to a second invention is characterized in that, in the first invention, the electric wire is held in a central portion of the input / output board.

  In the present invention, low voltage components can be reliably provided at the peripheral edge of the input / output board.

  A machine tool according to a third invention is characterized in that, in the first and second inventions, an electronic element disposition prohibiting area for prohibiting the disposition of the electronic element is provided around the circuit for monitoring the power supply voltage.

  In the present invention, an electronic element disposition prohibiting area for prohibiting the disposition of electronic elements is provided around a circuit for monitoring a power supply voltage that operates at a high voltage, thereby preventing other elements from being adversely affected by the high voltage. Can do.

  According to the machine tool of the present invention, since the electric wire connecting the input / output board and the protection part is held in a part other than the end part of the input / output board, the low-voltage component such as a connector over the entire peripheral part. Can be provided, the substrate surface can be used effectively, and signals can be input and output efficiently.

1 is a schematic perspective view of a machine tool according to an embodiment of the present invention. It is a simplified front view of a machine tool. It is a simplified right side view of a machine tool. FIG. 3 is a schematic perspective view of a machine tool in which a cover for covering the tool changer and the guide rail is omitted. It is a perspective view which shows the cover for machine tools schematically. It is a perspective view of the control apparatus which canceled closure with a lid. It is an external appearance rear view of the control apparatus which abbreviate | omitted description of the cover. It is the VIII-VIII sectional view taken on the line of FIG. It is a schematic diagram of the input / output board which concerns on embodiment of this invention. It is a schematic diagram of the conventional input / output board.

  Hereinafter, the present invention will be described in detail with reference to the drawings showing a machine tool according to an embodiment. In the following description, up and down, left and right, and front and rear indicated by arrows in the figure are used. The operator operates the machine tool in front and attaches / detaches the workpiece. 1 is a schematic perspective view of the machine tool 100, FIG. 2 is a schematic front view of the machine tool 100, FIG. 3 is a schematic right side view of the machine tool 100, and FIG. 4 is a tool changer and a guide rail. 1 is a schematic perspective view of a machine tool 100 in which a cover and the like for covering are omitted.

  The machine tool 100 includes a machine main body (processing device). The machine main body includes a base 20, a fixed base 21, a Y-direction moving device 22, an X-direction moving device 26, a column 28, a Z-direction moving device 30, a spindle head 32, A tool changer 10 and the like are provided. The base 20 is fixed on the floor surface. The fixed base 21 has a rectangular box shape that is long in the front-rear direction, and is provided on the base 20. The fixed base 21 fixes the Y-direction moving device 22.

An X-direction moving device 26 is provided on the Y-direction moving device 22. A column 28 is provided on the X-direction moving device 26. The X-direction moving device 26 and the Y-direction moving device 22 support the column 28 so as to be movable in the X direction (left-right direction) and the Y direction (front-back direction).
The column 28 supports the spindle head 32 through the Z-direction moving device 30 so as to be movable in the Z direction (vertical direction). The tool changer 10 changes a tool attached to the spindle head 32.

  As shown in FIG. 4, the Y-direction moving device 22 includes a pair of guide rails 22a and 22a parallel to each other, a plurality of blocks 22b, 22b, ..., 22b, a Y-direction moving table 22c, and the like. The guide rails 22a and 22a extend in the front-rear direction on the upper surface of the fixed base 21 with an appropriate interval in the left-right direction. The blocks 22b, 22b, ..., 22b are fitted to the guide rails 22a, 22a so as to be movable in the front-rear direction. The Y-direction moving base 22c is fixed on the blocks 22b, 22b,. A Y-direction drive motor (not shown) drives a ball screw mechanism (not shown), so that the Y-direction moving base 22c moves in the front-rear direction.

  The X-direction moving device 26 includes a pair of guide rails 26a, 26a parallel to each other, a plurality of blocks 26b, 26b,..., 26b, a column base 26c, and an X-direction drive motor (not shown). The guide rails 26a, 26a extend in the left-right direction on the upper surface of the Y-direction moving table 22c with an appropriate interval in the front-rear direction. The blocks 26b, 26b, ..., 26b are fitted to the guide rails 26a, 26a so as to be movable in the left-right direction. The column base 26c is fixed on the blocks 26b, 26b,. The X-direction drive motor drives a ball screw mechanism (not shown), so that the column base 26c moves in the left-right direction. The column 28 is fixed on the column base 26c. The column 28 is moved in the Y direction and the X direction by the Y direction moving device 22 and the X direction moving device 26.

  The Z-direction moving device 30 includes a pair of guide rails 30a, 30a parallel to each other, a plurality of blocks 30b, 30b,..., 30b, a spindle head base 30c, and a Z-direction drive motor (not shown). The guide rails 30a and 30a are extended in the vertical direction on the front surface of the column 28 with an appropriate interval in the horizontal direction. The plurality of blocks 30b, 30b, ..., 30b are fitted to the guide rails 30a, 30a so as to be movable in the vertical direction. The spindle head base 30c is fixed to the front surfaces of the blocks 30b, 30b, ..., 30b. When the Z-direction drive motor drives a ball screw mechanism (not shown), the spindle head base 30c moves in the vertical direction.

  The spindle head 32 is fixed to the spindle head base 30c. By driving and controlling the X direction drive motor, the Y direction drive motor, and the Z direction drive motor, the spindle head 32 moves back and forth, left and right, and up and down.

  The main shaft 34 is connected to a main shaft motor 35 provided at the upper end of the main shaft head 32. The main shaft 34 rotates around the shaft center by driving the main shaft motor 35. The spindle 34 can rotate the workpiece fixed to the workpiece holding unit 120 by rotating around the axis center with a tool holder (not shown) holding a tool attached to the lower end thereof. it can. A cooling fan (not shown) is fixed to the upper end of the spindle motor 35.

  As shown in FIG. 1, the tool changer 10 includes a tool magazine 11 and a magazine motor 12. The tool changer 10 conveys a plurality of tool holders, and attaches / detaches the tool holder to / from the lower end portion of the main shaft 34. The tool holder holds a tool.

  FIG. 5 is a perspective view schematically showing the machine tool cover 1. As shown in FIG. 5, the machine tool 100 includes a machine tool cover 1 that surrounds the machine body. A machine tool cover 1 is provided above the base 20. The machine tool cover 1 extends in the vertical direction, and includes a rectangular front wall 50, a left wall 60, a right wall 70, and a rear wall 80 that respectively cover the front, rear, left, and right sides of the machine body of the machine tool 100. Further, the machine tool 100 is covered with a rectangular ceiling 90 that covers the upper side of the machine tool 100 and is parallel to the left-right direction and the front-rear direction.

  The right wall 70 is provided with two removable panels 71 and 71 at the center thereof. The panels 71 and 71 are disposed in an opening provided in the central portion of the right wall 70. The operator removes the panels 71 and 71 as necessary, puts his hand through the opening, or enters the machine tool cover 1 through the opening to perform maintenance management of the machine tool 100. The left wall 60 is also provided with an opening at the center thereof, like the right wall 70, and two removable panels are arranged in the opening. The rear wall 80 is provided with a control device 81 having a control board for controlling the operation of the machine tool 100 and amplifiers for supplying electric power to the motors. A central portion of the ceiling 90 protrudes upward in order to avoid contact with the main shaft and the column.

  A vertically long rectangular opening 51 is provided at the center of the front wall 50, and an operation panel 54 for an operator to input a command is provided to the right of the opening 51. A vertically long rectangular right door 52 and left door 53 are juxtaposed in the opening 51 so as to be movable in the left-right direction.

  The right door 52 is disposed behind the left door 53. A handle 52 a is provided on the front surface of the right door 52. When the operator holds the handle 52a and pulls it to the left side, the right door 52 and the left door 53 sequentially move to the left side and open.

  As shown in FIGS. 6 to 8, the control device 81 includes a vertically long rectangular parallelepiped casing 82 having an opening on the rear side, and a lid 83 for opening and closing the opening. An insertion hole 82 a through which the power cable 111 is inserted is provided on the lower surface of the housing 82. A breaker 84 that can cut off the connection between the power cable 111 and the power line is provided on the lower left side of the housing 82. The breaker 84 is located in the vicinity of the insertion hole 82a. The breaker 84 has a rectangular parallelepiped shape that is long in the vertical direction, and has an input part and an output part in the vertical direction. The power cable 111 passes through the insertion hole 82a and connects the input portion of the breaker 84 and the 200V power source 110. A power line (not shown) for supplying power such as an amplifier is connected to the output section of the breaker 84. A switch portion 84 a is provided on the rear surface of the breaker 84. When the lid 83 is closed, the switch portion 84a is connected to a rotary lever 85 provided on the surface of the lid 83. When the lever 85 rotates in one direction with the lid 83 closed, the switch portion 84a moves in one direction to release the connection between the power cable 111 and the power line, and the power supply is forcibly stopped. When the lever 85 rotates in the other direction with the lid 83 closed, the switch unit 84a moves in the other direction, reconnects the power cable 111 and the power line, and the supply of power is resumed. The lid 83 is opened after the lever 85 rotates in one direction and the connection of the power line is released. A fan 112 that cools the control device 81 is provided on the left outer surface of the housing 82.

  A Z-direction amplifier 86 for controlling power supply to the Z-direction drive motor is provided at the left central portion of the front surface of the housing 82. A spindle amplifier 87 for controlling power supply to the spindle motor 35 is provided on the left side of the Z direction amplifier 86 and above the breaker 84. An X-direction amplifier 88 and a Y-direction amplifier 89 that control power supply to the X-direction drive motor and the Y-direction drive motor are arranged side by side on the upper left side of the front surface of the housing.

  An AVR 91 for converting a 200V system voltage into a 24V system or a 12V system is provided at the center on the upper right side of the front surface of the housing 82. Below the AVR 91, a fan protection device 92 for protecting / relaying the cooling fan (not shown), and a protection device for protecting an input / output board 93 and a control board (control unit) 94, which will be described later, from overcurrent ( Protection part) 95 is arranged in parallel on the left and right. The fan protection device 92 and the protection device 95 are connected and unitized. The control device 81 is provided with an optional amplifier 97 as necessary. As the option amplifier 97, for example, when the machine tool includes a robot arm that attaches a workpiece to the workpiece holding unit 120, an amplifier that controls power supplied to a drive motor of the robot arm can be used.

On the right inner surface of the housing 82, there is provided a control board 94 that includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and controls the driving of each motor described above, and the control board 94 and an input / output board 93 for inputting and outputting signals between various devices in the casing 82 are arranged in parallel. Further, an interlock substrate 132 is disposed below the input / output substrate 93. The control board 94, the input / output board 93, and the interlock board 132 are fixed to a rectangular metal 134 provided in substantially the entire right inner side of the housing 82. The control board 94 is positioned above the input / output board 93. The AVR 91 is connected to the control board 94 and the input / output board 93, and a 24V or 12V system voltage is input to the control board 94 and the input / output board 93. The control board 94 and the input / output board 93 are used by converting a 24V system or 12V system voltage into, for example, a 5V system, a 10V system, or a 25V system.
The input / output board 93 and the fan protection device 92 are connected by a voltage detection cable (electric wire) 96 for detecting the voltage input to the fan protection device 92, and the input / output board 93 is input to the fan protection device 92. And a power supply voltage monitoring circuit unit 932 having a power supply voltage monitoring circuit for monitoring the power supply voltage (see FIGS. 8 and 9). As described above, since the fan protection device 92 and the protection device 95 are connected, the power supply voltage input to the protection device 95 can be monitored by monitoring the power supply voltage input to the fan protection device 92. The protection device 95 can function normally.
The interlock substrate 132 is electrically connected to the input / output substrate 93 and performs control and the like when the right door 52 and the left door 53 are opened.

  The output portion of the breaker 84 is connected to an X direction amplifier 88, a Y direction amplifier 89, a Z direction amplifier 86, a main shaft amplifier 87, a fan protection device 92, a protection device 95, and an option amplifier 97. The power supply voltage (200 V system) is supplied to the X direction amplifier 88, the Y direction amplifier 89, the Z direction amplifier 86, the main shaft amplifier 87, the fan protection device 92, the protection device 95, and the option amplifier 97. The protection device 95 is connected to the AVR 91, and a power supply voltage (200 V system) is input to the AVR 91.

  As shown in FIGS. 8 and 9, the input / output board 93 includes a board 931, the power supply voltage monitoring circuit unit 932 provided at a predetermined distance from one short side of the board 931, and four sides of the board 931. A plurality of connectors 933 provided along the line and a low voltage circuit unit 136 are provided. The power supply voltage monitoring circuit unit 932 is located on the center side and above the peripheral edge of the substrate 931. The voltage detection cable 96 is fixed to the substrate 931 by the connector 130 and is connected to the power supply voltage monitoring circuit unit 932. The power supply voltage monitoring circuit unit 932 receives the power supply voltage from the fan protection device 92 through the voltage detection cable 96.

A rectangular opening 131 is formed in the substrate 931 on which the power supply voltage monitoring circuit unit 932 is located.
An edge spacer (not shown) having substantially the same shape as the opening 131 is fitted into the opening 131. The edge spacer fixes the substrate 931 to the metal plate 134 with a predetermined space with the metal plate 134. The edge spacer has a metal piece attached to a part thereof, one end of the metal piece is in contact with a ground pattern (not shown) of the power supply voltage monitoring circuit unit 932, and the other end is in contact with the metal plate 134. Therefore, the power supply voltage monitoring circuit unit 932 is grounded via the edge spacer.
Around the power supply voltage monitoring circuit unit 932, an electronic element disposition prohibited area 135 is provided so that the high voltage does not adversely affect other parts. However, the connecting element 137 connecting the low voltage circuit part 136 and the power supply voltage monitoring circuit part 932 is arranged in the electronic element arrangement prohibition area 135, but only two elements are provided. As the connection element 137, it is necessary to use an element that is not affected by a high voltage. For example, a photocoupler or the like can be used. The width of the electronic element placement prohibited area 135 is about 3.5 mm.

  The low voltage circuit unit 136 is disposed below the power supply voltage monitoring circuit unit 932. The low voltage circuit unit 136 is composed of elements that operate in a 5V system, a 10V system, or a 25V system.

  The control device 81 of the present embodiment is configured as described above, and the voltage detection cable 96 can be provided near the center from the end of the input / output board 93, and the power supply voltage monitoring circuit 932 is provided on the board 931. The low-voltage components such as the connector 933 can be provided over the entire peripheral edge of the input / output board 93. Therefore, the surface of the input / output substrate 93 can be used effectively, signals can be input / output efficiently, and the size of the input / output substrate 93 can be reduced.

In the present embodiment, the case where the voltage value is 200V system, 24V system, 12V system, 5V system, 10V system or 25V system is described, but the present invention is not limited to this, and other voltage values are used. But you can.
A cover that covers the power supply voltage monitoring circuit unit 932 may be provided above the power supply voltage monitoring circuit unit 932.

DESCRIPTION OF SYMBOLS 1 Machine tool cover 10 Tool changer 20 Base 21 Fixed base 22 Y direction moving device 26 X direction moving device 28 Column 30 Z direction moving device 32 Spindle head 34 Spindle 81 Control device 82 Housing 83 Cover 84 Breaker 91 AVR
92 Fan Protection Device 93 Input / Output Board 931 Board 932 Power Supply Voltage Monitoring Circuit Unit 933 Connector 94 Control Board 95 Protection Device 96 Voltage Detection Cable 100 Machine Tool 130 Connector

Claims (3)

A machining apparatus for machining a workpiece, a control unit for controlling the machining apparatus, an input / output board having a circuit for inputting and outputting a signal and a signal for inputting and outputting a signal, and a power supply voltage are input, A control device having a protection unit that protects the circuit from overcurrent, the input / output board and the protection part are connected by an electric wire, and the input / output board has a circuit for monitoring a power supply voltage.
The machine tool, wherein the electric wire is held in a portion other than an end portion of the input / output board.   The machine tool according to claim 1, wherein the electric wire is held at a central portion of the input / output board.   The machine tool according to claim 1 or 2, wherein an electronic element disposition prohibited area for prohibiting the disposition of electronic elements is provided around a circuit for monitoring the power supply voltage.

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