JPS60167712A - Rod-like work kind detector by support center of hobbing machine - Google Patents

Abstract

PURPOSE:To detect the axial length of a rod-like work and thereby to detect the kind of the work by only setting axial length data of the work in a storage. CONSTITUTION:When a support center 2 and a rod-like work 5 come in contact, a pressure switch 10 is activated. When the switch 10 generates a signal 10a, a position signal 9a is generated by a position detecting readout unit 9 to indicate the axial length of the rod-like work 5. When the signal 10a is generated, a comparator 11 compares the signal 9a from the unit 9 with data 7a in a storage 7 for checking thereof; if there is data indicating the same axial length as the axial length data of the signal 9a, the comparator 11 transmits a work kind discriminating signal 11a indicating the kind of the work corresponding thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting the model of a shaft workpiece by a support center of a hobbing machine.

When machining various types of workpieces with a hobbing machine, it is necessary to know the workpiece model, but for workpieces with different shaft lengths, the workpiece model is detected by detecting the position of the lower end of the support center.

Conventionally, a number of limit switches corresponding to the number of workpiece types were installed above and below the support center, and the workpiece type was detected by the on/off signal of each limit switch. Therefore, if there are many types of workpieces with different shaft lengths, it is necessary to correctly attach a large number of limit switches to the positions according to the shaft length (9), and it takes a lot of effort to adjust the liquid phase position of each limit switch. This method has the drawbacks of being time consuming and requiring a large installation space. In addition, since a limit switch is used, even if there is a mis-clamp, there will be a negative point at the 8-Mk value I. In view of the above-mentioned drawbacks of the prior art, the present invention uses a limit switch. To provide a workpiece type detection device that can detect workpiece types without using a workpiece type, does not require adjustment time even if there are many workpiece types, does not require much installation space, and can detect misclamping.

The workpiece type detection device of the present invention that achieves this purpose includes a storage device that presets shaft length data for each type of shaft workpiece, and a resolver and encoder that detects the position of the lowering end of the support center of the hobbing machine. A linear position detection device such as , a position detection readout device that reads data from this linear position detection device, and a fluid pressure change in a fluid pressure device that lowers the support center can detect when the support center has come into contact with the shaft workpiece. A pressure switch to detect,
It has a comparison device that determines the model of the shaft workpiece by comparing the output data from the position detection and reading device and the shaft length data preset in the storage device using the activation signal of the pressure switch as the operation timing. .

In the workpiece type detection device configured as described above, the linear position detection device measures the position of the lower end of the support center steplessly, so regardless of the size of the workpiece type, the position is captured when the pressure switch is activated. The data from the position detection device indicates the axial length of the shaft workpiece. Therefore,
By comparing this data with the axis length data for each model in the storage device in the comparison device, the one with the matching data is determined as the model of the shaft workpiece. If there is no coincidence of data, it may be due to a misclamp or the model does not have data set in the storage device, so the comparator will stop the hobbing machine from starting or give a warning to the operator. signal can be output.

Therefore, if there are many types of workpieces, it is only necessary to set the axis length data corresponding to the number of workpieces in the storage device, and there is no need to use and adjust a large number of limit switches as in the past. Additionally, this device can be easily installed without changing the 1*12 structure of the current hobbing machine.

An embodiment of the present invention will be described below with reference to the drawings. In the drawing, 1 is a hobbing machine body, 2 is a support center, 3 is a cylinder for raising and lowering the support center, 4 is a solenoid pulp for cylinder control, 5 is a shaft workpiece, and 6 is a limit switch for detecting the rising end. Note that these are ordinary hobbing machines, and the support center 2 is lowered to support the shaft workpiece 5.

The work type detection device of this embodiment includes a storage device 7, a linear position detection device 8 such as a resolver or an encoder, a position detection successive device 9, a pressure switch 10, and a comparison device (comparator) 11. have In the storage device 7, axis length data of necessary workpiece models is preset in correspondence with the model. The main body 8a of the position detecting device 8 is fixedly installed in the vertical direction on the hobbing machine main body 1, and the detection head 8b is interlocked with the support center 2 and detects pulses etc. from the main body 8a. The signal 8c is sent to the position detection device 9, from which a signal 9a representing the position of the lowering end of the support center 2, that is, the axial length of the workpiece is obtained. The position detection readout device 9 is given the activation signal 6a of the limit switch 6 for detecting the rising end of the support center. This is to increase the number of participants. Therefore, this limit switch 6 has no relation to the limit switch conventionally used for detecting the type of workpiece. Pressure switch f10td is a device that detects when the J-boat center 2 has descended and abutted against the lily 11 object work 5, and is installed in the fluid pressure circuit 12 for lowering the support center 2. Now, the solenoid valve 4 is energized to lower the support center 2, and the cylinder 3 is supplied with pressure through the fluid pressure circuit 12. The pressure switch 1o is activated when the pressure switch 1O is hit.The pressure switch 1O's activation signal 10R force f outputs the position signal 9a from the position detection device 9 at the sowing point. 5 itself.Therefore, when the activation signal 10g of the pressure switch 10 is output, the comparator 11 compares and collates the position signal 9a from the position detection and reading device 9 with the stored data 7a of the storage device 7. , position signal 9
Same as the axial length data of a (permissible range is set as necessary).

If there is stored data indicating the axis length, output a work model determination signal 11m indicating the work model corresponding to the data,
At the same time, the signal line 11b is set to 1, for example, to indicate whether or not the workpiece type is a preset one. position signal 9a
If the axis length data does not match any of the stored data, it is either a non-machining axis workpiece or a misclamp, and the signal line 11b becomes, for example, O to indicate this. Signal #11b is sent to the control section and operation section of the hobbing machine,
If it is 0, it is used to stop the machine from starting or to generate an alarm.

As explained above, according to the work type detection device of the present invention, the work type can be detected without using a limit switch. Since the axial length of the shafted workpiece can be detected steplessly, even if there are many types of workpieces within the detectable axial length range, it can be easily handled by simply setting the axial length data in the storage device, saving adjustment and installation space. No problems at all.

Furthermore, if a shaft workpiece is incorrectly clamped for the same reason, or if a shaft workpiece that is not to be machined is attached, this can be reliably checked. Furthermore, since the work type detection device of the present invention is realized by a storage device, a linear position detection device 1 position detection readout device, a pressure switch, and a comparison device, it can be easily implemented without changing the mechanism of the current hobbing machine. Can be installed on.

[Brief explanation of drawings]

The south view is a configuration diagram showing an embodiment of the present invention. In the drawing, l is the hobbing machine body, 2 is the support center, 3 is the cylinder, 4 is solenoid pulp, 5 is a shaft workpiece, 6 is a limit switch, 7 is a storage device, 8 is a direct # type position detection device, 9 is a position detection reading device; 10 is a pressure switch, 11 is a comparison device. patent applicant Mitsubishi Heavy Industries, Ltd sub-agent Patent Attorney Mitsuishi Shibu (1 other person)

Claims (1)

[Claims] A storage device that presets axis length data for each type of shaft work, a linear position detection device such as a resolver or encoder that detects the position of the lowering end of the support center of the hobbing machine, and this linear position detection device. A position detection readout device that reads data from the device, a pressure switch that detects whether the support center is still in contact with the shaft workpiece by changes in the fluid pressure of the fluid pressure device that lowers the support center, and an activation signal for this pressure switch that operates. The hobbing machine support center has a comparison device that determines the model of the shaft workpiece by comparing the output data from the position detection and reading device with the shaft length data preset in the storage device as a timing. A ton needle also goes to n1 kr+ W± &