JPH0446732A - Processing program preparation method - Google Patents

Abstract

PURPOSE:To facilitate preparation of a program for processing a hole in a notched plane, by generating such a processing program which feeds a drill quickly up to a notched plane and makes the drill process a hole to a specified depth in accordance with the inputted definition of the notched plane and data for hole processing. CONSTITUTION:When a programmer inputs Z-axis coordinate value Zd, angle 0 degree, hole diameter d and hole depth l, an interactive numerical control device judges whether a notched plane 2 is defined or not, determines a point of intersection P between the notched plane 2 and the center axis of a hole 4, and if the point of intersection P is found, generates a processing program for quickly feeding a drill to the point of intersection P which is defined as the entrance of the hole, then generates a processing program, in which the point of intersection between the raw material plane defined first and the center axis of the hole is taken as the entrance of the hole. Since a program is generated referring to the point of intersection between a notched plane and the center axis of a hole to the entrance of the hole, the depth of the hole can be directly specified. Moreover, since a generated processing program allows quick feed of a drill up to the entrance of a hole, processing program can be made in a short time.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for creating a machining program for a cylindrical workpiece.
In particular, the present invention relates to a method for creating a machining program for drilling holes on a notched surface.

[Conventional technology]

When processing grooves, holes, etc. on a cylindrical workpiece, a processing method called C-axis processing is used.

In C-axis machining, a certain point on the cylinder is defined by the angle between the Z-axis and the C-axis. The angle of the C-axis is defined as the angle from the vertical line, with the point directly above the central axis of the cylinder being 0 degrees.

On the other hand, when drilling a hole in a cylindrical workpiece, the user specifies the Z-axis and angle of the center position of the hole, and also specifies the depth and diameter of the hole. These specifications can be made interactively, and data can be entered manually in response to questions on the display screen.

[Problem to be solved by the invention]

However, in conventional hole machining, the depth of the hole could only be defined as the depth of the hole from the cylindrical surface. As a result, when a workpiece has a notched surface and a hole is to be drilled in the notched surface, the actual depth of the hole must be specified by the depth from the cylindrical surface. Furthermore, the completed machining program is a machining program in which the drill is fed in rapid traverse up to the cylindrical surface and in cutting feed until it reaches the notch surface. As a result, the machining program requires a long machining time.

The present invention has been made in view of these points, and it is an object of the present invention to provide a method for creating a machining program that can easily create an Ofuna nibogram on a notched surface.

Another object of the present invention is to provide a machining program creation method for creating a machining program for rapidly feeding a drill to a notch surface.

[Means to solve the problem]

In order to solve the above problems, the present invention uses a machining program creation method that interactively creates a machining program for drilling holes in the notch surface of a cylindrical workpiece. A machining program is generated that manually enters the Z-axis coordinate, angular position, hole diameter, and hole depth, finds the intersection of the center of the hole and the notch surface, sends the drill in rapid traverse to the intersection, and drills the hole. A machining program creation method is provided.

[Effect]

Define the notch surface and enter the hole machining data manually.

An interactive numerical control device or the like finds the intersection between the center of the hole and the notch surface, sends the drill in rapid traverse to the notch surface, and generates a machining program that drills the specified hole depth.

As a result, the depth of the hole manually can be the same as the actual depth of the hole. In addition, since the drill is rapidly traversed to reach the hole, a machining program with short machining time can be created.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a perspective view showing the processed shape of a workpiece having a notched surface. The workpiece 1 has a cutout surface 2 on its right side. It is assumed that a hole 3 is machined in the notch surface 2. Set the center axis of the hole to 4. The Z-axis coordinate of the hole is Zd, and the angle is 0 degrees.

Therefore, the programmer specifies the hole position Zd, O degrees.

Furthermore, specify the depth l and diameter d of the hole.

These specifications are entered on the screen of the interactive numerical control device.

The interactive numerical control device determines the intersection point P between the center axis of the hole and the notch surface. Next, a machining program is generated in which rapid feed is performed to point P and cutting feed is performed from point P.

FIG. 3 is a schematic diagram of the hardware configuration of an interactive numerical control device for implementing the present invention. The processor 11 is R
The entire numerical control device is controlled according to the system program stored in the OM12.

EPROM or EEFROM is used as the ROM 12. A DRAM or the like is used as the RAM 13, and various data or input/output signals are stored therein. The nonvolatile memory 14 uses a battery-backed CMO 3, and stores parameters, pitch error correction amounts, tool correction amounts, etc. that should be retained even after the power is turned off.

The graphic control circuit 15 converts the digital signal into a display signal and supplies it to the display 16. Display 16 is CR
A T or liquid crystal display device is used. The display 16 displays the shape, machining conditions, etc. when creating a machining program in an interactive manner.

The operation panel 17 is a device PMC consisting of a keyboard, etc.
(7" programmable machine controller) 18 receives output signals from the bus 20, processes the output signals with a sequence program, and controls the machine tool 19. It also receives input signals from the machine side. Then, processing is performed using a sequence program, and the human input signal is transferred to the processor 11 via the bus 20.

These components are coupled to each other by a bus 2o.

Note that components such as an axis control circuit, a servo amplifier, a servo motor, a spindle amplifier, and a spindle motor are omitted in FIG. It is also possible to use a plurality of processors to form a multiprocessor system.

FIG. 1 is a flowchart of a machining program creation method. In the figure, the number following S indicates the step number.

[S1] The programmer inputs the hole's two-axis coordinate value (Zd) and angle (
0 degrees), hole diameter (d), and hole depth (1) on the operation panel 17.
Enter from.

[S2] Determine whether the cutout surface 2 is defined. If it is defined, proceed to S3; if not, proceed to S6.

[S3] The interactive numerical control device determines the intersection point P between the notch surface 2 and the central axis 4 of the hole.

[S4] Determine whether there is an intersection, and if so, proceed to S5; if not, proceed to S6.

[S5] Since there is an intersection P, a machining program is generated that uses the intersection P as the entrance of the hole and sends the drill in rapid traverse to the entrance of the hole.

[S6] The intersection of the first defined material surface and the center line of the hole is set as the population of the hole. A machining program is generated accordingly.

Note that steps 82 to S6 are performed by an interactive numerical control device. In this way, hole machining on the cutout surface can be easily generated.

In the above description, the notch surface was horizontal and the hole was vertical, but the same process can be performed by drilling a hole on an inclined notch surface. This machining is performed by rotating the workpiece around the C-axis so that the notch surface is horizontal.

Further, in the above explanation, the machining program is created using an interactive numerical control device, but the same can be done by creating an interactive program using an automatic program creation device.

〔Effect of the invention〕

As explained above, in the present invention, the machining program is generated with the intersection of the notch surface and the central axis of the hole as the entrance of the hole, so the depth of the hole can be directly specified.

In addition, since the generated machining program is sent to the entrance of the hole by the drill in rapid traverse, a machining program with a short machining time is created.

[Brief explanation of the drawing]

Fig. 1 is a flowchart of the machining program creation method, Fig. 2 is a perspective view showing the machining shape of a workpiece having a notched surface, and Fig. 3 is a schematic diagram of the hardware of an interactive numerical control device for implementing the present invention. FIG. Workpiece notch surface hole center axis processor OM AM non-volatile memory graphic control circuit display operation panel MC machine tool noise

Claims (3)

[Claims] (1) In a machining program creation method that interactively creates a machining program to drill a hole in the notch surface of a cylindrical workpiece, the notch surface is defined, and the Z-axis coordinate of the center position of the hole, the angular position, and the hole Creating a machining program characterized by inputting a diameter and a depth of a hole, finding an intersection between the center of the hole and the notch surface, sending a drill in rapid traverse to the intersection, and generating a machining program for drilling the hole. Method. (2) The machining program creation method according to claim 1, wherein the machining program is generated by an interactive numerical control device. (3) The machining program creation method according to claim 1, wherein the machining program is executed by an interactive automatic program creation device.