JPS5973252A - Tool and tool attaching device - Google Patents

Abstract

PURPOSE:To make it possible to automatically determine whether the position of a tool is accurate or not, by providing a magnetic scale on the tool or a tool holder so that a signal is obtained by a magnetic head on a tool attaching part. CONSTITUTION:A magnetic scale 3 is provided to the shank 2 of a tool 1. A magnetic head 6 is provided on a tool attaching part 4 by means of a head holder 5 so that the magnetic head 6 is opposed to the magnetic scale 3, and detects magnetism on the magnetic scale and issues a signal which is fed to a computing device 9 for automatically discriminating whether the tool is attached accurately to a predetermined position in the tool attaching part or not.

Description

[Detailed description of the invention] The present invention relates to tools and tool mounting devices.

When installing various tools or tool holders on a machine tool, it is important to know whether the tools or tool holders are correctly installed in the specified positions when performing precision machining, especially on electric discharge machines. Tool attachment is important when machining is performed by attaching an electrode to a part. However, no device has conventionally been provided that can automatically determine whether or not the tool has been accurately installed at a predetermined position in the tool installation section.
Particularly in machining centers, it has not been possible to automatically detect defects in tool mounting due to deformation of the shape of the tool or tool holder, adhesion of chips, etc.

The present invention has been made based on the above-mentioned viewpoints, and its purpose is to ensure that the tools are accurately mounted at predetermined positions on the machine tool of a machining center when various tools are mounted on the machine tool of a machining center. It is an object of the present invention to provide a tool and a tool attachment that automatically determine whether or not the tool has been used.

The gist of the present invention is to provide a magnetic scale on a tool or a tool holder, and to attach the tool to grip the tool or tool holder by reading the scale of the magnetic scale with a magnetic head attached to the part and sending an appropriate signal. The signal from the magnetic head is transmitted to the computing device through a line, and the computing device analyzes the output of the magnetic head to detect the installed position of the tool or tool holder, and the tool is installed accurately at the predetermined position of the part. The objective is to automatically determine whether or not the device is attached to the device.

Fig. 1 is an explanatory diagram showing an embodiment of the tool and tool attachment device according to the present invention, Fig. 2 is a vertical sectional view showing a method for attaching the magnetic throat and The tool attachment is an explanatory diagram showing another embodiment of the device.

Note that in each figure, the same reference numerals denote components having the same function.

In Figure 1, 1 is the electrode, 2 is the shank, 3.3 is the magnetic scale provided on the side of the shank 2, 4 is the tool attachment part, and 5
．． 5 is a head holder provided integrally with the tool mounting section 4, 6.6 is a magnetic head provided at the bottom of the throat holder at a position facing the magnetic scale, 7 is an electrode shaft, 8 is a signal line, 9 is a It is a computing device.

The In scales 3, 3 are provided at positions that divide the outer periphery of the side surface of the shank 2 into three equal parts, and the scales are magnetized perpendicularly to the axial direction, and those are magnetized parallel to the axial direction. will be attached.

The graduations of the magnetic scale 3.3 are provided by directly magnetizing the shank 2 when forming the electrode, or by attaching a magnetized magnetic body to the shank 2. Furthermore, when the electrode 1 is attached to the tool part 4, it may be provided by being directly magnetized to the shank, or may be provided by being magnetized to a magnetic body attached to the shank.

The head holder 5.5 is provided at a position dividing the outer periphery of the tool mounting section 4 into three equal parts, and its upper end is fixed to the tool mounting section 4.

The magnetic head 6.6 is attached to the lower end of the head holders 5, 5, and when the shank 2 is attached to the tool attachment part 4, the magnetic scale 3.3 is set so that the scale of the magnetic scale 3.3 provided on the shank 2 can be read. The tip of the magnetic scale is arranged so that it either lightly touches the scale of the magnetic scale or approaches it at a predetermined minute interval. Further, the magnetic head 6.6 is configured to read the graduations of a magnetic scale magnetized perpendicularly to the axial direction, and to read the graduations of a magnetic scale magnetized parallel to the axial direction.

Here, the method of attaching the magnetic throat is shown in Figure 2.
The ACT light electrode is 1°C depending on the work. When the 'rit ti is installed or removed, it is necessary to configure the magnetic head to move outward appropriately to avoid contact with the shank and damage it.

Therefore, as shown in FIG. 2, a suitable cylindrical hole is provided in the lower end of the head holder 5 in a direction perpendicular to the axis, and a magnetic belly button F6 is housed inside this hole, and the spring 10 and/or
Alternatively, the electrode 1 can be attached to the tool attachment part 4 by a device using a control element 11 such as a solenoid or a hydraulic cylinder, so that the magnetic head 6 can be moved appropriately when the electric jIfil is attached or removed. At this time, the magnetic head 6.6 separately picks up the scales in the direction perpendicular to the axis and in the direction parallel to the axis of the magnetic scale 3.3 provided on the shank 2, and the signal is transmitted to the arithmetic unit 9 through the signal line 8. , arithmetic device i! 9 analyzes the position of the scale of the magnetic scale read by the magnetic head 6゜6 and sets the electrodes 1 in the front and rear, left and right, and up and down directions.
By detecting the position of the electrode 1, the inclination of the electrode 1, and the deviation in rotation about the main axis, it is automatically determined whether the electrode 1 is accurately attached to the predetermined position of the tool attachment part 4.

FIG. 3 is an explanatory diagram showing one embodiment of the tool and tool mounting device of the present invention, in which a wireless transmitter and receiver are provided in the signal line in a machine tool such as a drilling machine that cuts a workpiece by rotational motion. be.

1' is a tool, 2' is a tool holder, 3, 3 is a tool holder 2
4' is a tool attachment part of the spindle, 12 is a transmitter that transmits a signal, and 13 is a receiver that receives the signal from the transmitter.

The magnetic scale 3.3 is provided on the side surface of the tool holder 2' at a position that divides the outer circumference into thirds, and the scale is magnetized perpendicularly to the axial direction or parallel to the axial direction. It also has things.

The head holder 5.5 is constructed integrally with the tool mounting section 4', and its upper end is fixed to the tool mounting section 4'.

The magnetic head 6.6 is attached to the lower end of the hemlock holder 5.5, and when the tool holder 2' is attached, the magnetic head 6.6 is attached to the magnetic scale 3, 3 so that the scale of the magnetic scale 3.3 can be read.
The tip of the magnetic scale is arranged so that it either lightly touches the scale of the magnetic scale or approaches it at a predetermined minute interval. Further, the magnetic head 6.6 is configured to read the graduations of a magnetic scale magnetized perpendicularly to the axial direction, and to read the graduations of a magnetic scale magnetized parallel to the axial direction.

One end of the signal line 8 that conveys the signal from the magnetic head 6.6 is connected to the magnetic head, and the other end is connected to the transmitter 12 that transmits the signal.
It is connected to the.

When the tool holder 2' is attached to the tool mounting section 4', the magnetic head 6.6 follows the graduations of the magnetic scale 3.3 provided on the tool holder, and the signal is transmitted to the transmitter 12 via the signal line 8. When the signal is located, the transmitter 12 wirelessly transmits the signal, and the transmitted signal is received by the receiver 13 and transmitted to the computing device 9, which interprets the signal and determines the position of the tool holder 2'. is calculated, and it is automatically determined whether the tool is correctly installed at a predetermined position in the tool installation section.

According to the above embodiment, signals can be transmitted to the computing device without any problem even in a machine tool that cuts a workpiece by the rotational movement of the spindle, and in cases where it is difficult to install a signal line from the magnetic head to the computing device. It can also be remotely determined whether the tool has been correctly installed in the predetermined position of the tool attachment part.

Since the present invention is configured as described above, according to the present invention,
It is possible to provide a tool and a tool mounting device that automatically determines whether or not the tools are accurately mounted at predetermined positions in a tool mounting section when various tools are mounted on a machine tool.

The configuration of the present invention is not limited to the above-mentioned embodiments, and the tool and tool mounting device of the present invention may be mounted on any machine tool, and the shape and shape of the tool and tool holder may be changed. The dimensions may also be arbitrary. Furthermore, the number of magnetic scales, magnetic heads, and head holders to be installed, their installation positions, mounting methods, etc. can be freely changed within the scope of the purpose of the present invention, and the present invention does not include any of them. It is something to do.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the tool and tool mounting device according to the present invention, Fig. 2 is a vertical cross-sectional view showing a method for mounting the magnetic head, and Fig. 3 is an explanatory diagram showing an embodiment of the tool and tool mounting device according to the present invention. Attached is an explanatory diagram showing another embodiment of the device. 1−・−１−−−・−１−−・−−−−１−−−−・−
Electrode 1'-1----------・------1--
Tool 2--・--1--・---1-------
−Shank 2 / −−−−−−−−−−−, −,, −
・−・−Tool holder 3−・−−1−・−・−1−−−−
−−−・−・−Magnetic scale 4.4'−−=・・−・−
1-----Tool installation is part 5-----
・−−−−1−・Head holder 6・・・−−−−・−
1--------・-----・--Magnetic head 8--・-
−−−−・−−−−・−・−1−−・−Signal line 9−−
−−−−−−−−−−−−−−−−−−・・Arithmetic device 1
2- ・−・−・−−１−−−−−−−・−・・−Transmission<
1a13------------111-- Receiver patent applicant Inoue Japax Research Institute Agent (7524) Shotabe Mogami

Claims (1)

[Scope of Claims] <i> An RTT scale scale tool or tool holder, a magnetic head attached to a tool mount for gripping the tool or tool holder and capable of reading the scale of the magnetic scale, and a magnetic head. A tool and tool attachment device consisting of an arithmetic device that analyzes the output of the magnetic head, and a signal line that transmits signals from the magnetic head to the arithmetic device. (2) The tool and tool attachment device according to claim 1, wherein the signal line comprises a wireless transmitter that transmits a magnetic head signal and a receiver that receives the signal.