JPH02167652A - Profiling method - Google Patents

Abstract

PURPOSE:To correctly out a coated range by a cutter and to execute cutting, by forming a conductive paint film on the necessary place of the model mode of a non-conductive material and shortening the length of a stylus at the time when the stylus is brought into contact with the painted film. CONSTITUTION:A profile model C is made of the non-conductive material of a plaster, etc., and a paint film 20 is formed with a conductive paint being coated on the necessary place. When the profiling point 7 of a stylus (b) is brought into contact with the paint film 20, the relay of the power source for an electromagnet is turned ON and excited, a mobile cylinder 6 is attracted and the profiling point 7 is lifted by contraction A'. A profiling voltage is then output from a work transformer to drive a servomotor, notching is executed by descending the cutter by the contraction A' and the dieing of high accuracy without the generation of floating and creases can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a profiling method for machining press molds and the like.

(Prior art) Generally, a copying die-cutting machine faithfully traces a copying model with a tracer and cuts it into the shape of the model.

Sheet metal molds have convex and concave molds. For example, a concave copying model is created by duplicating the convex model. Therefore, when a concave mold is made using this concave copy model, the convex and concave shapes become completely symmetrical. Furthermore, in order to maintain a certain gap between the convex and concave shapes, this is achieved by making the tip radius of the stylus (tracer) of the convex copying model different from that of the concave copying model.

However, with the convex and concave designs of sheet metal presses, when the two dies are put together, the gap between the two dies is not constant over the entire area, and there is a part that strongly presses the iron plate to hold it, and a part that presses it weakly. There is a part where the iron plate slides, and the balance between the two prevents the product from cracking or wrinkling.

Therefore, the convex or concave type is processed so that the mold gap in the part that holds the iron plate is narrow and the mold gap is wide in the part where the iron plate is to be slid.

Conventionally, in the above mold processing, paper tape was pasted on the surface of a copy model made by replicating the convex mold, and only the surface of the copy model that corresponded to the part that held the iron plate was raised by the paper tape.

As a result, the tip of the stylus traces over the paper tape that has been affixed, and then traces the surface of the model to which no paper tape is affixed.The part that is not affixed to the paper tape is deeply cut, and the part that is not affixed to the paper tape is cut deeply. A recessed portion will be formed.

Furthermore, Japanese Patent Application Laid-Open No. 75761/1987 discloses a surface copying method and apparatus for performing high-precision copying while preventing the tip of a stylus from running off the undulating surface of a copying model. Japanese Unexamined Patent Publication No. 59-59341 discloses a technique that allows a stylus to smoothly follow the undulating surface of a copying model.

(Problem to be solved by the invention) In the above conventional method of making a mold by pasting paper tape,
It is relatively easy to attach paper tape to the flat surface of the copy model, but it is difficult to attach it to the undulating surface.

For example, when attaching paper tape to a three-dimensional undulating surface,
The paper tape may come up in some areas, and wrinkles may appear in some areas.

When the stylus traces this paper tape, the raised parts and wrinkled parts will be traced as they are.

Therefore, the resulting mold is inaccurate, and the holding portions and sliding portions of the iron plate do not conform to the design, resulting in defective pressed products with cracks and wrinkles.

Furthermore, as mentioned above, pasting the paper tape greatly affects the degree of processing of the mold, so it is a labor-intensive manual process that requires great care and skill.

Therefore, there is a problem that a large amount of cost is spent on mold processing and productivity is extremely low.

Also, JP-A-57-75761 and JP-A-59-5
The techniques disclosed in Publication No. 934.1 are intended to improve the copying performance.

(Means for Solving the Problems) In order to solve the above problems, the present invention forms a conductive paint film at necessary locations on a model made of a non-conductive material,
When the stylus is in contact with something other than the paint film, the stylus is maintained in its normal state, and when the stylus comes into contact with the paint film, the length of the stylus is shortened and the servo motor is activated to lower the cutter. This is what I want to do.

(Function) With this configuration, the conductive paint is accurately applied along the undulations of the surface of the copy model.

When the paint film and the stylus come into contact, they are electrically connected, and the coated area is precisely cut by the cutter.

(Example) An example of the present invention will be described in detail below. First, as shown in FIG. 3, in the stylus, a fixed barrel 5 is screwed into an outer barrel 22 with a screw 12, and a movable barrel 6 is inserted so as to slide inside this fixed barrel 5. is fixed with a set screw 11.

The movable cylinder 6 is always given an elastic force in the direction of protrusion by the coil spring 3, and the contraction force in the opposite direction is applied by the electromagnet 2.
It is given by the suction force of.

Further, the amount of contraction A of the movable cylinder 6 is finely adjusted by rotating the fixed cylinder 5 screwed into the outer cylinder 22 and using a scale lO carved on the outer cylinder 22. After making this fine adjustment, it is locked with the setscrew 4. 1 is a shank, and 8 is a spring holder. Figure 3 (a) shows the state in which the movable cylinder 6 is protruding due to the coil spring 3. In Fig. 3(a), the electromagnet 2 is excited by the power supply 9, and the movable cylinder 6 is attracted, and fine adjustment is made. It shows a state in which it has shrunk by a shrinkage amount A'.

The stylus configured in this manner is attached to the tracing tracer a as shown in FIG.

b is the attached stylus. and stylus b
The electromagnet 2 is connected to an electromagnet power source via a relay CM.

As shown in Figure 2, copying model C is made of non-conductive material such as plaster or resin, and conductive paint is applied with a brush to the necessary areas (the part where the iron plate will be pushed). A membrane 20 is formed.

Therefore, on the surface of the copying model C, a non-conductive portion 21 and a conductive portion (paint film 20) are formed.

Further, as shown in FIG. 1, the paint film 20 and the crossrel d are electrically connected via a relay CM, and a voltage is constantly applied between them.

Next, copy processing is performed as follows.

Depending on the contact state between the profiling point 7 of the stylus b and the surface of the profiling model, the operating transformer built in the profiling tracer a outputs a profiling voltage, which causes the two-axis servomotor g, Y-axis servomotor h, Drives the X-axis servo motor i.

The cross rail d is moved in two directions by the drive of the servo motor g, the spindle head j is moved in the Y direction by the Y-axis servo motor h, and the work table is moved in the X direction by the X-axis servo motor i. Cutter e is X, Y
, move in the Z direction. As a result, the workpiece f is patterned.

In this copying process, copying point 7 of stylus b
When the paint p,@20 comes into contact with the paint film 20, the paint p, @20 and the cross rail 6 are electrically connected, and the relay CM is activated. Due to the operation of the relay CM, the relay CM of the electromagnet power source is turned on and the electromagnet 2 is excited. As a result, the movable cylinder 6 is attracted against the elastic force of the coil spring 3, and the copying point 7 is lifted by the amount of contraction A' and separated from the surface of the copying model C.

Along with this, a copying voltage is output from the operating transformer built in the copying tracer a.

The servo motor g is driven by the output of this tracing voltage, moves the cross rail d in two directions, and shrinks the cutter e by the amount A.
′ and make the cut.

Next, when the copying point 7 comes off the paint film 20, the paint film 20 and the cross rail d are electrically disconnected, the relay CM is activated, and the relay CM of the power source for the electric stone 6R is turned OFF.

As a result, the electromagnet 2 is de-energized, the movable tube 6 is pushed out by the coil spring 3, the tracing point 7 traces the non-conductive portion 21, and the tracing of that portion is performed.

In this way, by forming the conductive part (paint film 20) and the non-conductive part 21 on the surface of the copying model C,
Deeply trace only the areas that correspond to the conductive parts. This depth of cut is accurately adjusted using the scale IO.

(Effects of the Invention) As detailed above, according to the present invention, a conductive paint is applied to the surface of a copying model to form a conductive part and a non-conductive part on the surface, and this surface is traced. Since the cutter is driven by a servo motor, it is possible to deeply cut along the conductive portion.

As a result, all that is required is to apply conductive paint to predetermined locations on the copying model, which greatly improves work efficiency and greatly improves productivity. It has the excellent effect of being able to perform highly accurate mold processing without creating wrinkles.

[Brief explanation of the drawing]

FIG. 1 is a side view of a copying machine for carrying out the method of the present invention, FIG. 2 is a plan view of the copying model in FIG. 1,
Figure 3 is the stylus in Figure 1, (a) is a vertical cross-sectional view showing the state in which the movable cylinder is protruding, and (b) is a vertical cross-sectional view showing the state in which the movable cylinder is adsorbed to the electric stone. be. a... Copying tracer, b... Stylus, C
...Copy model, d...Crossrail, e
...Cutter, f...Work, g...
2-axis servo motor, h...Y-axis servo motor, i...X-axis servo morph, j...spindle head, k...
Work table, 20...Paint film. Toyota Motor Corporation (2 idiots) 1 Diagram a Clothes 11 On the other hand, d-70 spool 9-2-shaft two-ho' motor Main thin shaft B 2 Tyrer 2 C-4 cross-motor ? Le
-η・, 9 f work) 1. = Y size - O - morph i-x @ size - one ζ morph = Work table size 2 figure

Claims (1)

[Claims] A conductive paint film is formed at the required locations on a model made of non-conductive material, and when the stylus is in contact with a place other than the paint film, the stylus is maintained in a normal state, and the stylus is kept in contact with the paint film. A copying method characterized by shortening the length of the stylus when it comes into contact with the film, and activating a servo motor to lower the cutter.