JPH01159155A - Working of index cam on machining center - Google Patents

Abstract

PURPOSE:To work a various sorts of index cams with high precision by installing a custom macro function into an NC controller and inputting the necessary main dimensions of the index cam and directly working a various sorts of the index cams by the NC controller. CONSTITUTION:An NC controller 2 (CNC 2) equipped with a computer built in is constituted of an NC device 4, PC 5, custom macro 1, etc., and these devices are controlled by a CPU 3, and the custom macro 1 performs the instruction functions supplied to the NC device 4 and the PC 5 by the variable input data inputted into the custom macro 1. By inputting the cam outside diameter, cam total length, cam material, screw shape, screw pitch, number of stripes of the screw, torsional angle, etc., as the necessary main dimensions of an index cam into the custom macro 1, the automatic working control of the index cam which has the above-described dimensions is carried out directly by the CNC 2. Therefore, a various sorts of the index cams can be worked speedily with high precision, and the operation efficiency of the machining center can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a processing method for automatically processing an index cam using a machining center, and particularly to a method for automatically processing an index cam using an existing numerical control device of the machining center. This invention relates to an index cam machining method using a machining center.

[Conventional technology]

FIG. 3 shows the index cam 11 and the turret plate 12 that meshes with the index cam 11. The index cam 11 is made of a cylindrical body with a threaded groove 13, and the protrusion 14 of the turret plate 12 meshes with the threaded groove 13. , the turret plate 12 is indexed and rotated (the illustration shows the turret plate 12 that is indexed into 8 equal parts). If the thread groove 13 has a normal thread groove shape, it can be processed by shaft rotation and screw feeding, but the illustrated method Since the thread groove 13 of the index cam 11 needs to mesh with the cylindrical protrusion 14 (made of something like a rotatable roller bearing), it is necessary to change the twist angle from time to time during machining. Therefore, as shown in FIG. 4, the index cam 11 is machined by holding the index cam processing material 11a, which is the object to be cut, on the rotary table 15 and rotating it around the axis. On the other hand, the cutter 17, which has a shape matching the thread groove 13, is moved and positioned along the x, y, and z axes of the machining center. Note that during processing, it is desirable that the cutter 17 be positioned at the pivot center O of the pivot table 16.

As described above, the index cam 11 is
Machining requires five-axis machining: X, Y, Z, A, and B axes.

In the prior art, this five-axis control was performed by an automatic programming device 8 provided outside the NC device 4a that engaged with the mechanical system 6. In other words, the index cam 11 is set in advance using the host processor 9, cutter location data, etc.
The programming necessary for machining the index cam 11 was created, inputted to the existing NC device 4a via the tape 7, and the index cam 11 was machined by controlling the mechanical system 6 along five axes using the NG device 4a.

[Problem that the invention seeks to solve]

5-axis control with NC equipment! Automatic programming outside of 4a8
When processing only one type of index cam 11, there is no particular problem, but when it is necessary to process many types of index cams 11 sequentially,
Automatic programming 8 must be created each time according to the specifications, and this must be input into the NC device 4a.

Therefore, a lot of setup time is required, programming errors are likely to occur, and the high-precision index cam 11
A problem arises in which it is not possible to produce a

The present invention solves the above-mentioned problems, and allows many types of index cams to be processed quickly and with high precision.
An object of the present invention is to provide an index cam processing method using a machining center that can improve the operating efficiency of the machining center.

[Means for solving problems]

The present invention provides a custom macro function in a numerical control device that engages with a mechanical system, inputs the main necessary specifications of an index cam into the custom macro, and allows the numerical control device to directly process many types of index cams. The present invention is characterized by an index cam machining method using a machining center as described above.

〔Example〕

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

As shown in Fig. 1, a numerical control device 2 with a built-in computer
CCNC2) is the NG device 4. Consists of PO2, custom macro 1, etc. These are controlled by the CPU built into the CNC 2, and the custom macro 1 uses the variable input data input to the NC unit! 4 and PO2. The custom macro 1 allows the customer to input arbitrary variable data into a software circuit formed internally using known technology, and then executes the NG device 4 and PO2 based on the variable data.
It is configured so that it can operate. Therefore, the data that has already been input can be rewritten and new data can be input by the customer at any time, and the functions of the CNC 2 can be greatly expanded. Therefore, by inputting the main required specifications of the index cam 11, such as the cam outer diameter, cam total length, cam material, thread shape, thread pitch, thread number, and helix angle, into the custom macro 1 as shown in the figure,
Automatic processing control of the index cam 11 having these specifications can be performed directly by the CNC 2. That is, as in the prior art, the index cam 1 is
There is no need to create processing software for the index cam 11, and the index cam 11 can be automatically machined by simply inputting the necessary specifications one by one directly into the custom macro 1 of the C''N C2.

The work of inputting the conversion data does not require any particular skill and is less likely to cause mistakes, so the index cam 11 can be processed with high accuracy, and one setup requires only the input of the conversion data, making it possible to greatly reduce time.

Further, the custom macro 1 is a well-known technology as described above, and it is not difficult to incorporate its function into the CNC 2, but it can be done relatively easily.

[Effects of the Invention] As is clear from the above description, according to the present invention, various types of index cams can be processed quickly and with high precision, and the operating efficiency of a machining center can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a block diagram of conventional index cam processing, Fig. 3 is a plan view showing the general structure of the index cam, and Fig. 4 is processing of the index cam by a machining center. FIG. 3 is a plan view for explaining the method. 1...Custom macro, 2...CNC, 3...C
PU, 4, 4a...NC device, 5---PC, 6...
- Mechanical system, 7... Tape, 8... Automatic programming device, 9... Host processor, 10... Cutter location data.

Claims (1)

[Claims] In the index cam processing method, which is automatically processed using 5-axis control, a custom macro function is installed in the machine control device, and the main specifications of the index cam, such as cam outer diameter, cam length, cam material, and thread shape, are specified in the custom macro. , a method for processing index cams using a machining center, which is characterized by inputting thread pitch, number of threads, helix angle, etc., and processing many types of index cams.