JPH0691487A - Machining device with work discriminating function - Google Patents

Abstract

PURPOSE:To provide a machining device with a work discriminating function which has a simple constitution where an escape mechanism to contact and separate a work discriminating device main body from a work on a jig is eliminated. CONSTITUTION:A standard surface detector 7 is set on a main shaft head 6 at the side of a tool 8, and a contact 10 of the standard surface detector 7 is abutted to the standard surface of a work by utilizing the movement of the main shaft head 6. In this case, the sort of the work is discriminated from the displacement of the contact 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining apparatus having a workpiece discrimination function for discriminating a plurality of types of workpieces.

[0002]

2. Description of the Related Art When processing a plurality of types of works on a processing line such as a transfer machine in which a plurality of processing devices are arranged, it is necessary to determine the type of work to be processed next. Conventionally, such a work discriminating apparatus is mounted on a jig for setting a work piece, and when the work piece to be processed next is set on the jig by a transfer device or the like, the type of the work piece is determined. The type of the workpiece is discriminated by bringing the sensor head of the workpiece discrimination device close to the specified reference position on the workpiece.

[0003]

The work discriminating apparatus installed on the jig as described above has a risk of interference between the tool and the work discriminating apparatus when machining a work piece. It is necessary to retract the workpiece discrimination device to a position where it does not interfere with machining. Therefore, it is necessary to provide such a work discriminating apparatus with a relief mechanism for bringing the main body of the work discriminating apparatus into and out of contact with the work on the jig.
For this reason, there is a problem in that the conventional work discriminating apparatus has a complicated structure.

The present invention has been made in order to solve the above problems, and has a simple structure in which the escape mechanism for contacting and separating the main body of the workpiece discriminating apparatus from the workpiece on the jig is eliminated. An object is to provide a processing device having a discrimination function.

[0005]

As a means for achieving the above-mentioned object, the present invention provides a workpiece support member for supporting a workpiece having a reference surface, and a tool mounted thereon, which is movable relative to the reference surface. The type of workpiece is determined from the spindle head, the reference plane detector mounted on the spindle head, and the relative position of the reference plane and the reference plane detector when the spindle head is moved to the measurement position. And a determining means.

[0006]

The discriminating means determines the relative position between the reference plane and the reference plane detector when the spindle head and the workpiece are moved relative to each other and the spindle head and the workpiece approach to a predetermined position. The type of work piece supported by the work piece support member is determined.

[0007]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows one processing station in a processing line. A machining device 3 is for machining the machining surface WP of the workpiece W installed on the jig 1 on the workpiece support member 2 by the tool 8. In the processing device 3, the spindle head 6 including the spindle to which the tool 8 is attached is
It has a main shaft drive motor 29, and is supported by a servomotor 30 so as to be movable on the column 5 in the Z-axis direction (inclination direction). The column 5 has an inclined surface that supports the spindle head 6, and is supported by the servo motor 31 so as to be movable on the bed 4 in the X-axis direction (direction perpendicular to the paper surface of FIG. 1). A reference surface detector 7 shown in FIG. 2 is attached to the tip of the spindle head 6.

The reference plane detector 7 includes two workpieces Wa and W.
The determination is made by bringing the contact 10 into contact with the reference surfaces WPa and WPb provided on b. The reference surface detector 7 is fixed to the spindle head 6 by a mounting portion 9, and a contact 10 having an abutting portion 10a at its tip is slidable in the Z-axis direction on a main body 8 having a hollow portion 8a formed therein. It is supported by. The contact 10 has a large diameter portion 10a in the hollow portion 8a, and is constantly urged by a spring 11 provided between the large diameter portion 10a and the hollow portion 8a in a direction in which the workpiece Wa, Wb is brought into contact with the workpiece. ing.

Two dogs 12a, 12b are attached on the rear axis of the contactor 10. Also, the main body 8
Via the bracket 19 to the two proximity switches 13
a and 13b are attached. These dogs 12
The distance between a and 12b and the proximity switches 13a and 13b is such that when the contact 10 abuts on the workpiece Wa, the proximity switch 13a detects the dog 12a and when the contact 10 abuts the workpiece Wb. Switch 13b is dog 1
2b is set to be detected. Also, the contact 1
In the normal state where 0 is not in contact with the workpieces Wa and Wb, the tip is in the original position 10c. At this time, the proximity switches 13a and 13b do not detect any of the dogs 12a and 12b, and the contact 10 of the contact 10 is not detected. The tip is set to be at a position offset from the tip surface of the tool 8 by α in a direction away from the workpieces Wa and Wb. Here, the value of α is a value that is at least larger than the cut amount of the tool 8.

1 and 2, reference numeral 18 is a tool cover, and 15 is a cover for protecting the proximity switches 13a and 13b. Next, the main electrical configuration of the control device of this embodiment will be described. In FIG. 1, reference numeral 36 is a central processing unit (CPU). A memory 37 and an interface 35 are connected to the central processing unit 36. The memory 37 stores a machining program and machining data for the machining apparatus 3, and also stores a workpiece discrimination program shown in FIG. 4 described later. Also, interface 3
5, a spindle drive motor 29, a servomotor 30,
The servo units 32, 33 and 34 for driving 31 are connected to the proximity switches 13a and 13b of the reference plane detector 7.

The operation of the reference plane detector 7 in this embodiment will be described based on the above configuration. FIG. 3 is a model diagram showing a process of determining that the workpiece is Wa, and FIG.
Is a flow chart showing a process of discriminating the workpieces Wa and Wb. As shown in FIG. 2, the tool reference point M0, which is the positioning reference of the tool 8, is set at the intersection of the tip surface of the tool 8 and the rotation center 100. The spindle head 6 is positioned so that the tool reference point M0 is located at the origin P0 when not machined. When a workpiece is loaded onto the jig 1 by an unillustrated loading / unloading device, the workpiece is moved to Wa, Wb.
The work for discriminating which type is is started (FIG. 4 (step 300)).

First, in step 302, the spindle head 6 is fast-forwarded by the tool 8 until the tool reference point M0 is located at the point P1, and then in step 304, it is slightly fed in the Z direction toward the workpiece Wa (FIG. 3). (A)). At this time, point P
At the position of 1, no matter whether the workpiece is Wa or Wb, when the spindle head 6 is finely fed in the Z direction, only the contact 10 of the reference plane detector 7 is moved to the reference planes WPa and WPb of the workpiece. The tool 8 is set in a position where it abuts and does not contact the workpiece.

The tool 8 is slightly fed from the point P1, and the point P2
By the time it is positioned at the (measurement position), the contact 10 comes into contact with the workpiece and retracts against the biasing force of the spring 11. Therefore, when the tool 8 is positioned at the point P2 when the workpiece is Wa, the dog 12a behind the contact 10 is displaced to a position where the proximity switch 13a is in the ON state, and a step is performed based on this detection signal. In 306, it is determined that the workpiece is Wa (YES), and the process proceeds to step 312 (FIG. 3 (b)).

In step 312, the tool 8 is moved to the machining start point P3a of the workpiece Wa by referring to the machining data of the workpiece Wa, and the machining of the workpiece Wa is started in step 314 (see FIG. 3 ( c)). At this time, the contactor 10 is at the original position 10c, and as described above, the original position 10c and the tip surface of the tool 8 are at the position offset by α in the direction away from the workpiece Wa, so that the machining is started. However, the contact 10 does not interfere with the workpiece Wa.

On the other hand, in step 306 described above, N
If it is determined to be O, in step 308, the tool 8
Is positioned at the point P2, the dog 12b of the contact 10
It is determined whether the proximity switch 13b is on, that is, whether the workpiece is Wb. Proximity switch 1
When 3b is on and it is determined that the workpiece is Wb (YES), the process proceeds to step 316. Then, in step 316, the tool 8 is moved to the machining start point P3b of the workpiece Wb based on the machining data of the workpiece Wb, and in step 318, the machining of the workpiece Wb is started.

If NO in step 308, that is, if neither of the proximity switches 13a and 13b is in the ON state, it is determined that the workpiece is not carried in and the abnormality is detected in step 310. Predetermined abnormality processing is performed. As described above, the processing apparatus having the workpiece discrimination function of this embodiment is the reference plane detector 7
Is installed on the spindle head 6 on the side of the tool 8 and the movement of the spindle head 6 is used to determine the workpiece. Therefore, when the workpiece is machined, the reference plane detector 7 is There is no need to provide a relief mechanism for retracting to an unobtrusive position, and there is an advantage that the configuration is simple and inexpensive.

In the above-described embodiment, two proximity switches 13a and 13b and dogs 12a and 12 are provided.
Although it is configured to discriminate between the two types of workpieces Wa and Wb by using b, the number of proximity switches and dogs is changed variously, or the stop position of the contact 10 at the point P2 is directly detected by the displacement sensor. It is possible to distinguish many kinds of workpieces. Furthermore, in this embodiment,
Although the positions of the reference planes WPa and WPb provided on the workpieces Wa and Wb are detected by displacing the contact 10, the distance sensor is used to detect the reference plane W at the point P2.
Workpiece W is measured by measuring the distance to Pa and WPb.
A configuration for discriminating between a and Wb may be used.

[0018]

As described above, in the machining apparatus having the workpiece discriminating function of the present invention, the reference plane detector is installed on the spindle head and the movement of the spindle head is used to mount the reference plane detector on the workpiece. Since the workpiece is identified by the relative position between the reference plane detector and the reference plane at the measurement position, the device for determining the type of the workpiece is machined when machining the workpiece. There is no need to provide a relief mechanism for retracting to an unobtrusive position, and there is an advantage that the configuration is simple and inexpensive.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a present embodiment.

FIG. 2 is a detailed view of a reference plane detector of this embodiment.

FIG. 3 is a diagram for explaining the operation of the present embodiment.

FIG. 4 is a flow chart for explaining the operation of the present embodiment.

[Explanation of symbols]

 2 Work support member 3 Machining device 6 Spindle head 7 Reference plane detector 8 Tool 10 Contact P2 Measurement position Wa, Wb, W Workpiece WPa, WPb, WP Reference plane

Front Page Continuation (72) Inventor Sendaro Sugita 1-1, Asahi-cho, Kariya city, Aichi Toyota Koki Co., Ltd.

Claims (1)

[Claims] 1. A workpiece support member for supporting a workpiece having a reference surface, a spindle head mounted with a tool and capable of moving relative to the reference surface, and a reference surface detector mounted on the spindle head. And a workpiece discriminating function comprising: a discriminating means for discriminating a kind of a workpiece from a relative position between the reference surface and the reference surface detector when the spindle head is moved to a measurement position. Processing equipment that has.