RU2577635C2 - Device for percussion-rotary engraving of material surface - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to decorative processing of materials. Claimed device comprises the body, pneumatic cylinder with its piston rigidly coupled with the con rod driving the crankshaft that makes the piston-type expander rod. Said piston-type expander has the first union with continuous compressed air feed and second union communicated with the pneumatic cylinder outlet via the tube with air pressure control valve. Saud unions allow the engraving tool reciprocation.

EFFECT: higher quality and efficiency of engraving.

3 cl, 1 dwg

Description

The invention relates to the field of artistic and decorative processing of materials, automated engraving and relates to a device for applying an image on the surface of solid materials by the method of impact-rotational engraving.

The proposed device for the implementation of rotational impact engraving is a further development of the design described in patent RU 2355586 C1 for the invention "Method for generating a grayscale image in the functional layer of the product", cl. IPC B44C 1/22, and patent RU 2350476 C2 for the invention "Device for applying images on a solid surface", cl. IPC B44V 3/00. These designs are selected as prototypes.

The proposed device is illustrated by a diagram that reflects the design of the site for the implementation of engraving by the shock-rotational method, consisting of a crankshaft (1) rigidly connected to a piston (2) moving in the cylinder (3). In its lower part (3) there is a fitting (4) through which compressed air is constantly supplied, in the upper part there is a drainage hole (5) for discharging air and a fitting (6) for inlet of air entering through the outlet (9) from the cylinder (7) when the piston (8) approaches the dead center, compressed air enters the cylinder (7) through the nozzle (10), moves the piston (8), causing the shaft (1) to rotate. As a result, we have two simultaneous movements of the crankshaft (1) with a tool (11) rigidly fixed at its end: reciprocating and rotational. The crane (12) allows you to adjust the impact force of the engraving tool due to the dispersion of part of the air into the atmosphere when it is opened. The position of the crane (12) is adjusted programmatically depending on the color of the image pixel. The frequency of impacts of the tool (11) is equal to the frequency of rotation of the shaft (1).

The main difference from the prototype (RU 2355586 C1) is that the turbine and electromechanical converter are replaced by a piston expansion machine and a pneumatic cylinder having smaller overall dimensions and weight.

The principle of operation of the proposed device for implementing rotational impact engraving is that compressed air is supplied through the nozzle (10) of the piston expansion machine to the cylinder head (7). When the piston (8) moves from the bottom dead center (BDC) to the top dead center (TDC), the shaft (1) rotates with an engraving tool (11). When approaching the BDC, air through the outlet (9) enters the cylinder (3) through the fitting (6), causing the piston (2) to move down, lowering the engraving tool (11), the piston (2) is raised upward after the passage of the BDC constantly entering air through the fitting (4). The movement of the piston (8) from BDC to TDC is carried out by a connecting rod by inertia. The cycle of impact-rotational engraving consists of one revolution of the shaft (1) with the tool (11) and its movement in the vertical plane down and return up - the impact of the rotating tool on the surface of the material. Moreover, the frequency of impacts can vary depending on the frequency of rotation of the shaft (1) with the tool (11) depending on the pressure of compressed air entering the nozzle (10). Between the frequencies there is a direct unambiguous relationship, in contrast to a conventional unit for implementing impact-rotational engraving, which is an advantage of the developed device.

The existing devices used for the implementation of rotational impact engraving use either an electromechanical converter with a turbine mounted on its body (low productivity and rigidity of the unit with its high mass), or a vibration transducer connected to the electric spindle by means of a rocker arm (the performance is comparable with the proposed device, but the cost of components is higher).

The developed device design for implementing the method of rotational impact engraving based on the use of reciprocating pneumatic machines allows to increase the productivity of the process and reduce the cost of the device compared to peers without loss of engraving quality.

Claims (3)

1. Device for applying an image to a solid surface containing an engraving tool, characterized in that it contains a housing, a pneumatic cylinder, the piston of which is rigidly connected to a connecting rod, which rotates the crankshaft, which is a rod of a piston expansion machine having a first fitting with a constant supply of compressed air and a second fitting connected to the outlet of the pneumatic cylinder by means of a tube with a tap-regulator of air pressure, while the above mentioned piston expansion fittings the machines are configured to reciprocate the engraving tool. 2. The device for applying the image according to claim 1, characterized in that the shock frequency and the rotational speed of the engraving tool are interconnected and equal. 3. The device for applying the image according to claim 1, characterized in that the impact force of the engraving tool on the surface of the workpiece is set by the position of the control valve located on the tube connecting the pneumatic cylinder and the piston expansion machine.