JPS609628A - Tool identification device - Google Patents

Abstract

PURPOSE:To prevent unstabilized sensing caused by attachment of machining liquid, splash, etc. by forming a part for sensing at the pull stud end-face of a tool to be replaced, and by identifying the tool by a sensor equipped on the way of the indexing path for tool accommodated in a magazine. CONSTITUTION:A plurality of holes 7 are bored equally divided on a circumference concentrical with the axis, at the end face of a pull stud 5 at the end of a taper shank 4 of a tool or a tool holder. A pin 6 is installed as planted at any desired point in this hole and is encoded. A mount table 9 equipped with a sensor 8 to sense if there is a pin, is installed on the way of the indexing path for tool accommodated in magazine so as to identify the tool under passage.

Description

TECHNICAL FIELD The present invention relates to a tool identification device in a numerically controlled machine tool with an automatic tool changer.

Many prior art tool identification devices have already been announced and used, but those in which the identification portion is provided on the outer periphery of the holder have a large unbalance, which has an adverse effect when the tool rotates at high speed. In addition, in other devices, the identification device is often complicated, and the construction cost increases. Furthermore, if the identification code portion is exposed, contamination with cutting fluid, chips, dust, etc. causes unstable detection, and furthermore, there are drawbacks of varying degrees, such as damage during replacement.

Purpose The present invention has been made in view of the above, and it is an object of the present invention to provide an identification device that is easy to manipulate on the code side and has high reliability.

Solution 1 The present invention provides a plurality of ridges or recesses at predetermined positions on the end face of a pull stand of a tool or a tool holder, and installs the same number of sensors facing the pull stand in the tool indexing path of the tool storage magazine. It is set up so that there is a constant relationship.

Example Embodiments of the present invention will be described below based on the drawings.

The tool or tool holder 1 has a groove 3 in the base 2 that is gripped by a gripper of a worker exchange arm (not shown), and the end face of the pull stud 5 at the end of the taper shank 4 has a plurality of grooves equally divided on the same circumference from the axis. In this example, six holes 67, into which bottles 6 serving as hanging objects to be tested can be planted so as to protrude, are drilled at certain angular positions with respect to the keyway 10 in which the tool holder is positioned.

If bottle 6 is planted in that hole, it is 1, otherwise it is 0.
26= by the 6 holes so as to represent the binary number of
It is possible to identify 64 types and use up to 64 tools. A larger number of tools can be identified by providing 8 holes or 6+1 holes by providing one hole in the center. The sensor 8 that detects the presence or absence of the bottle 6 and outputs an on/off signal, that is, a number 1.0, is located at 6'4 of the hole 7 of the pull stand 5.
Six pieces are buried in the mounting base 9 at positions corresponding to the quantile fit. A pull stand 5 and a sensor sensing section are provided on the passing path surface of a tool holder stored in a bottomless tool pot of a tool storage magazine (not shown) so as to face each other and be in a constant relationship with the tool.

Of course, the tools in the magazine must always be placed in constant relation to the pot, or indexed in a constant position when indexed to the sensor sensing position. Generally, two key grooves 10 in FIG. 1 are machined 180 degrees apart, so when the operator stores the key grooves in the magazine pot, the key grooves 10 may be stored 180 degrees oppositely. To avoid such mistakes, a mark (eye mark) is usually placed so that the relative position when stored is known, but in order to automatically detect it, the 21st
By providing 77 holes in asymmetrical positions as shown in the figure, 1
If it is possible to detect the 80° opposite position, it is easy to read the correct tool number by electrically changing the phase by 180°. Each time the tool in the magazine is fed one pitch, it makes a short stop, and a sensor detects this moment. When the sensor mount 9 is synchronously fed within the range of one index pitch and the tool 67 and sensor 8 are maintained in a constant relationship during this period, the magazine can be continuously fed until a predetermined tool is indexed. The sensor 8 is designed to detect only the bottle 6, and its signal is sent to the NC, which identifies the tool number based on the number and number of the hole in which the bottle 6 is planted. Big number 7□ of gold hole 7 7□7B+ 7. ,
75+ 76 out of 7. If a bi is planted in hole 78, the tool number is EIA hood and represents ya 5.

In addition, in this example, the bottle is inserted into the hole, but it is also possible to make a hole only in that part. Of course, it is not necessary to make a hole in the position where the bottle is not inserted, but the tool number Considering the degree of freedom when changing the position, it is preferable that holes be provided at all positions. Also, instead of installing bottles, a board drawn with a press or the like may be attached.

Effects As detailed above in 7, the present invention includes forming a code member on the end face of the pull stand of the tool or tool holder,
The amount of unbalance can be reduced, and even when the tool rotates at high speed, the vibrations and other problems caused by this are extremely small and can be ignored.In addition, it can be encoded by simply machining a commercially available tool shank. It is not necessary to manufacture a special tool holder, etc., and it can be realized at low cost.

Furthermore, the pull stud is housed inside the main shaft during processing, so there is no risk of cutting fluid or chips adhering to it, and even while it is stored in the magazine, it is located on the back side of the pot to prevent dust and reduce the risk of unstable detection. It has a feature that can improve reliability.

[Brief explanation of the drawing]

Fig. 1 is a correspondence view of the marking member and sensor member on the tool shank side, and Fig. 2 is an end view of the pull stand of the tool shank. 1... Tool 5... Pull stud 6... Bottle 7... Hole 8... Sensor patent applicant Okuma Iron Works Co., Ltd.-1. Figure 1 Figure 2

Claims (1)

[Claims] (1) The entire detection area consisting of a plurality of axial protrusions or recesses that form a code at a predetermined position on the end face of the pull stand of a machine tool with an automatic tool changer is formed, and the tool is stored in a magazine. A tool identification device comprising: a sensor disposed at a position corresponding to a passage path of the sensor and in the same relationship as the protrusion or recess of the detected portion.