EA013039B1 - Method for engraving a pattern on an article surface and an engraving head therefor - Google Patents

Abstract

The invention relates to methods of engraver's operation for artistically-decorative treatment of articles, mainly made of stone, for engraving patterns (e.g. portraits or pictures) on granite or the like monuments related to ritual services. The method of external zero working stylus for an engraving head is embodied for providing strongly metered hits by a percussion tool of the engraving head upon a flat, hard and polished surface, where the zero working stylus relative to which the percussion tool performs oscillatory movement is arranged not in the engraver, but outside the surface to be treated, since the percussion tool is not mechanically connected to the engraving head.

Description

The invention relates to methods of operation of devices for artistic and decorative processing of products, mainly of stone, and can be used when applying the image (for example, portraits or drawings), on granite or similar monuments in the field of funeral services.

A device is known - an electric engraving machine (patent KI 2077988, 1997 MKI V44V 3/00), comprising a housing with an internal vibration exciter fitted with a horseshoe-shaped armature, the core of which is connected through a pull with a striker, and an oscillation amplitude regulator fitted with a handle and a release spring.

In the known device, the zero operating point, relative to which the working tool makes an oscillatory movement, is inside the device and is realized by means of two springs, thanks to which the working tool, excited by the exciter, can oscillate relative to the operating point with the same amplitude in both directions along the axis of the device.

The disadvantages of the known device are the complexity of its design and as a result of this high cost and low reliability, as well as the fact that the impact force of the working tool on the treated surface and, accordingly, the brightness of the point is very much dependent on the distance from the device to the treated surface, with the maximum removal of the tool from The working tool will barely touch the machined surface and vice versa when approaching the stone surface, the impact force will increase and, accordingly, the brightness will be and left working tool on the surface will increase. These shortcomings lead to the fact that the transfer of a bitmap with a gradation of brightness points from 0 to 256, caused by such a device on the treated surface, is practically very difficult to implement.

The closest to the invention is a device for applying a halftone image on a flat surface of a polished product (patent KI 2121444, 1998 MKI V44V 3/00), containing a computer with a unit for preparing and entering information, an actuator, including a percussion instrument with a drive of vertical motion, connected to computer through the control unit of the drive of the vertical movement, the drive control device of the horizontal movement of the actuator on the coordinates X and Υ associated with the drive vertically movement and connected to a computer via electronic control devices and a clamping device.

The disadvantages of the known device are that the installation of the height of the electrodynamic drive of the vertical movement of the percussion instrument over the surface to be processed must be done very precisely (to the nearest hundredths of a millimeter) and when changing the working surface the height must be set again, and if the height is not accurate, then the brightness the points corresponding to one gray level for different working planes will be different. This is due to the fact that the zero operating point relative to which the percussion instrument oscillates, is inside the device and is realized by means of elastic suspensions, by means of which the percussion instrument is kept in the device at rest, and also in this device the working instrument begins its movement from zero the point inside the device overcomes the distance to the working surface and then strikes it, if necessary, inflict a weak blow corresponding to low in gray level, the working tool has to move slowly enough and the lower the gray level for the point, the slower the instrument must move, and given the large number of pixels in a raster image, the raster image process of applying onto the surface will be sufficiently long.

The task of the invention is to improve the quality of image transmission on the engraved surface, increasing the speed of application of the image and simplifying the design of the engraving head.

The task is solved by the method of the rendered zero operating point for the engraving head, which is intended to ensure the application of a strictly dosed strike with the working tool of the engraving head on a flat, hard and polished surface, at which the zero operating point relative to which the working tool oscillates is not inside the device , and imposed on the surface of the treated plane.

The essence of the method lies in the fact that the zero operating point, relative to which the working tool oscillates, is not inside the device, but is placed on the surface of the plane being machined, i.e. The work tool is not mechanically connected to the device, but rests on the surface to be machined.

The lifting height of the working tool above the working surface is directly proportional to the level of gray for a given point and is achieved by changing the duration of the application of lifting force. Having reached the required lifting height, the working tool under the influence of force, the reverse lift force, returns to the working surface and makes a blow, and at low levels of gray, the time to lift the needle is significantly reduced, which significantly speeds up the transfer of the bitmap to the working surface. As for the accuracy of the installation of the working tool above the surface, it rests in a free state on the working surface itself, which allows to avoid high-precision installation, and the design of the head itself eliminates the need for a mechanism for fixing the zero operating point inside the device.

- 1 013039

Engraving head, explaining the method rendered zero point is shown in the drawing, where

- cylindrical magnet

- coil body

- sliding bearing

- N1 coil cheek

- N2 cheek coil

- rod mounting engraving head

- a needle with a diamond tip

- coil winding

The engraving head consists of the coil body (2), on which the cheek N1 of the coil (4) and the cheek N2 of the coil (5) are fixed, and also the sliding bearing (3) is pressed into the lower part. A fastening rod of the engraving head (6) is screwed into the coil cheek N1 (4), which is used to fasten the entire head to the movement mechanism in X and coordinates.

The coil winding (8) is wound on the coil body (2). A cylindrical magnet (1) with a diamond-tipped needle (7) is attached to the coil body (2). A cylindrical magnet (1) with a needle with a diamond tip (7) is a working tool that is not mechanically connected with the rest of the design. The sliding bearing (3) protects it from below from the coil body (2), and the engraving head mounting rod (6) protects it from above. The alignment of the working tool is produced by a sliding bearing (3). The engraving head is installed above the working surface at such a level that the working tool confidently reaches the working surface. When a voltage is applied to the windings of the coil (8), an emf arises in it, which interacts with the cylindrical magnet (1). By changing the current in the coil winding (8), the direction of the current and the time of interaction of the EMF, it is possible to accurately dose the lifting force and the inverse of the lifting, and accordingly, the impact force of the working tool on the treated surface, and in combination with the coordinate device moving the head above the engraved surface, it is possible to apply a bitmap image with a high degree of compliance with the required gray levels.

The inventive method has been successfully tested in an experimental design.

Claims (1)

The method of engraving the image on the surface of the product, namely, that engraving is carried out by striking with a working tool with a force proportional to the level of shades of gray color of the picture, characterized in that a surface point is used as the zero working point relative to which the working tool oscillates the product itself with the subsequent lifting of the working tool above the surface of the product by an amount proportional to the level of the shade of gray at a given point isunka, followed by the impact force with a force proportional to the level of shade of gray in the drawing point.