RU121470U1 - DEVICE FOR APPLYING IMAGES ON A PLANE SURFACE OF POLISHED PRODUCTS - Google Patents

Abstract

A device for applying an image on the surface of a polished product, containing a computer, an actuator including a percussion mechanism with a tool, driving devices for horizontal movement of the actuator along the X and Y coordinates, characterized in that it additionally contains a control unit connected by feedback to the computer and to the drive devices for horizontal movement of the actuator along the X and Y coordinates, and the actuator is made in the form of a printing head located on the movable console of the device and additionally contains a control unit to which an impact mechanism with a tool, a drive device for vertical movement along the Z axis and carriage position sensors are connected an impact mechanism made in a device for an electronic-mechanical clamping and tracking the surface of the workpiece and consisting of a stationary magnet, a coil installed parallel to the plane of the magnet with the possibility of radial and a rotating percussion tool holder with two support bearings, while the carriage with the percussion mechanism attached to it is kinematically connected to the belt of the drive device for vertical movement along the Z axis through the pressure spring, on which a control plate is installed, interacting with the position sensors of the percussion mechanism carriage, and the print head control unit is looped back to the additional control unit of the device.

Description

The utility model relates to engraving devices and is intended for applying raster photographic images to glass, granite, marble, ceramics and other surfaces that can be diamond or carbide machined.

Known engraving machine containing a computer with a unit for preparing information input, an actuator, including a percussion instrument with a vertical drive, connected via a drive control unit to a computer, drive devices for horizontal movement of the actuator in X and Y coordinates, connected to the vertical drive and connected to a computer through electronic control devices (see IPC B44B 3/00 for a description of the invention to a patent from Great Britain No. 2002694, published on 28.02. 1979).

A disadvantage of the known device is the low reliability and performance of the device, due to the fact that the machine does not have feedback between the percussion instrument and the power drive, which does not allow to optimize the vertical movement of the percussion instrument depending on the type of material being processed and to ensure high accuracy in image transmission and reduce time of application.

Closest to the claimed technical solution is a device for applying a grayscale image to a flat surface of a polished product, comprising a computer with a data preparation and input unit, an actuator including a percussion instrument with a vertical drive, connected through a vertical drive drive control unit to a computer, drive devices horizontal movement of the actuator along the X and Y coordinates associated with the vertical movement drive and sub li ne to the computer through the electronic control device and the clamping device with the workpiece. In this device, an electrodynamic drive is used as a vertical movement drive. The drive includes a coil wound on the lateral surface of the dielectric cylinder actuator movable relative to the housing, on the free end of which the holder of the percussion instrument is attached to the actuator body using elastic suspensions, and also contains an additional device for controlling the parameters of the vertical movement of the percussion instrument, included in feedback circuit of the electrodynamic drive of the vertical movement of the percussion instrument and block the board of the electrodynamic drive of the vertical movement of the percussion instrument, and the coordinate of the coordinate of the point of impact, mechanically connected to the horizontal drive of the actuator along the X coordinate (see IPC B44B 3/00, description of the invention to the patent of the Russian Federation No. 2141444, published on 10.11.1998 - nearest analogue).

A disadvantage of the known device is limited functionality due to:

- the impossibility of printing on non-planar surfaces;

- low impact force;

- small stroke stroke of the percussion instrument;

- completely dependent on the control computer;

- low speed.

The technical result of the claimed utility model is to increase the stability of the engraving process and expand the functionality of the device.

The essence of the technical solution lies in the fact that the device for applying an image to the surface of a polished product containing a computer, an actuator including a percussion instrument, drive devices for horizontal movement of the actuator along the X and Y coordinates, additionally contains a control unit connected by feedback to the computer and to drive devices for horizontal movement of the actuator in X and Y coordinates, and the actuator is made in the form of a printed head a ki located on the movable console of the device and additionally contains a control unit to which a percussion mechanism with a tool is connected, a drive device of vertical movement along the Z axis and position sensors of the carriage of the percussion mechanism, made in the form of an electronic-mechanical clamping device and tracking the surface of the workpiece and consisting of a fixed magnet, a coil mounted parallel to the plane of the magnet with the possibility of radial movement and a rotating holder of the percussion instrument enta with two support bearings, while the carriage with the shock mechanism fixed to it is kinematically connected with the belt of the drive device for vertical movement along the Z axis through the spring of the clamp, on which a control plate is installed, which interacts with the position sensors of the carriage of the percussion mechanism, and the control unit of the print head is connected feedback to an additional device control unit.

The introduction of a control unit into the device allows for autonomous control of printing modes without disrupting it, which occurs in known devices operating under computer control in the presence of various interferences, interruptions in the mains voltage, which do not allow to restore the printing process. In the inventive device, thanks to the control unit, which coordinates the executive nodes of the device, storage of the printed image, the influence of external factors such as viruses, poor power supply, industrial interference in the power supply network and other production factors is excluded. The control unit is based on a controller with the CORTEX architecture.

The execution of the actuator in the form of a print head containing a control unit and a percussion mechanism made in the form of an electronic-mechanical clamp and tracking the surface of the workpiece, the kinematic connection of the percussion mechanism with a drive unit for the vertical movement of the print head allows for stability and a predetermined print speed, eliminating the effect unevenness of the processed surface, the influence of vibrations on the work of the impact mechanism and, thus, improve print quality.

In general, due to the introduction of an additional control unit and the constructive execution of the actuator, the claimed device provides a high degree of reliability of image transmission, workmanship with high speed.

The proposed device for applying images to the surface of a polished product is illustrated by drawings, where in Fig. 1 is a functional diagram of the device, in Fig. 2 is a general view of the device, in Fig. 3 is a general view of a percussion mechanism with a percussion instrument, and in Fig. 4 is a general view of a percussion mechanism with a percussion instrument, in figure 5 is a General view of the device of electronic-mechanical clamp and tracking.

A device for applying an image on a flat surface of a polished product contains a computer 1, a control unit 2, an actuator made in the form of a print head 3, a drive device 4 for the movement of the actuator along the X axis, consisting of a stepper motor 5, a backlashless belt reducer 6 and driver 7 , a drive device 8 for the movement of the actuator along the Y axis, consisting of a stepper motor 9, a backlash-free belt gear 10 and a driver 11. The print head 3 contains a control unit 12, is connected first feedback to control unit 2.

The impact mechanism of the print head 3 is made in the form of an electronic-mechanical clamping device and tracking the surface of the workpiece and consists of a fixed magnet 13, a coil 14 mounted parallel to the plane of the magnet 13 with the possibility of radial movement and a rotating holder 15 of the needle 16 with two bearings 17 and 18. The rotating holder 15 is spring loaded relative to the axis 19 for self-installation in a vertical position (see figures 3 and 4).

The impact mechanism is mounted on the carriage 20. The carriage 20 is kinematically connected with the drive device 21 by a belt 22 (see figure 5) of vertical movement along the Z axis, through the spring 23 of the preload. On the belt 22 is installed a control plate 24, interacting with the sensors 25 and 26 of the position of the carriage 20 of the percussion mechanism (see figure 5).

The drive device 21 of vertical movement along the Z axis, consists of a stepper motor 27 and driver 28, sensors for tracking the printing surface 25, 26 and the carriage 20, which moves along the rail. Limit switches 29 and 30 are also connected to the control unit 2, carrying the function of zero points in the X and Y coordinates (see figure 1). The printhead 3 is mounted on the movable console 31. To move the console 31 along the bed 32, high-precision linear rail guides 33 and 34 are used (see figure 2). The limit switch 35 of the drive device 21 is connected to the control unit of the head 12.

A device for applying an image to the surface of polished products works as follows: a command is issued from computer 1 to position the device, control unit 2 issues commands to drivers 7 and 11, which generate rotation signals of stepper motors 5 and 9. As a result, the console 31 starts its movement along to both coordinates until the sensors 29 and 30 send signals to the control unit 2 that they have reached the initial position of the print head 3. Then, a graphic image of the original from computer 1 is loaded into numbers Ovom form in the internal memory of the control unit 2. Also print parameters are loaded, such as pitch, frequency, number of passes, information about the impact force for various gradations of image brightness.

The control unit 2 provides a signal to the control unit 12 of the print head 3, which in turn gives a control command to the driver 28 of the drive device 21 and, as a result, the print head starts its movement along the Z axis until it comes into contact with the surface. To ensure movement during printing, the control unit generates control signals to drivers 7 and 11, which generate rotation signals of the stepper motors 5 and 9. To print the image point, the control unit 12 provides a signal to the percussion mechanism, which converts the electrical impulses arising from the passage of electric current through the coil 14 into rotational motion at a speed proportional to the current, as a result of which the needle 16 makes a blow to the workpiece 36 of the required strength. Moreover, the magnet 13 provides a sufficient margin of stroke of the impact mechanism of ± 5 mm, which, with an average needle gap 16 of the order of 0.3 mm to the working surface of the product 36, allows us to consider the accuracy of the gap setting as a non-critical parameter.

The control of the pressure of the percussion mechanism and tracking the surface of the product 36 is as follows: during printing under the influence of the stepper motor 27, the percussion instrument 16 is pressed against the work surface of the product 36. The pressure is applied until the spring 23 is compressed by 50% ± 1 mm so that the control metal plate 24 is positioned between the magnetic sensors 25 and 26. While moving along the uneven surface of the product 36, the plate 24 includes either a sensor 25 or 26, which gives a signal to the control unit 12. The control unit 12 makes the necessary adjustment of the pressure of the percussion mechanism in one direction or another, and thus provides a constant pressure. In this case, the spring 23 plays the role of a shock absorber, leaves the gap always constant, which increases the stability and print quality. The image is printed line by line, point by point parallel to the console 31 (X coordinate). Upon completion of printing one line, the console 31 moves along the frame 32 to the next line and the process repeats. Each point has its brightness from 1 to 256, which is regulated by the impact force (the percussion mechanism receives the corresponding signal from control unit 2, through control unit 12). The print head 3 allows you to print at a speed of 300 to 500 dots per second. The electronic-mechanical tracking device for the surface of the workpiece provides high stability and print quality. The coil 14 having the ability to radial movement, significantly increases the response time of the percussion mechanism. Upon completion of printing, the head 3 rises up and goes to the starting point of printing.

The print quality in the inventive device is governed by spatial resolution. Resolution is measured in the number of dots per unit length. The choice of spatial resolution depends on the structure of the material and the depth of the print. For example, for Karelian granite, the optimal resolution is 33-40 points per centimeter, which corresponds to the distance between neighboring points of 0.3-0.25 mm.

The location of the print head 3 on the movable console 31 improves the loading process of the workpiece 36 and allows printing on surfaces far exceeding the size of the working field of the device.

The closest analogs are printed in bit mode, in which halftones are transmitted by changing the number of white dots per unit length. The proposed utility model allows you to implement a new algorithm for the transmission of halftones (256 shades of gray) halftones are transmitted by changing the impact force, which extends the functionality of the device. It implements a fundamentally new tracking system for the surface of the workpiece, which allows it not to critically relate to the plane of the surface of the product (level difference up to 5 mm over a length of 30 cm), implements the algorithm for restoring print after stopping, significantly increased printing speed, thanks to the block design, high reliability and maintainability of the utility model, noise during operation is significantly reduced, after loading the image, the utility model works completely autonomously (does not depend on control most computer).

Claims (1)

A device for applying an image to the surface of a polished product containing a computer, an actuator including a percussion mechanism with a tool, drive devices for horizontal movement of the actuator at X and Y coordinates, characterized in that it further comprises a control unit connected by feedback to the computer and to the actuators devices of horizontal movement of the actuator at the coordinates X and Y, and the actuator is made in the form of a print head located on the mobile console of the device and additionally contains a control unit, to which a percussion mechanism with a tool is connected, a drive device of vertical movement along the Z axis and position sensors of the carriage of the percussion mechanism, made in the device of electronic-mechanical clamping and tracking the surface of the workpiece and consisting of a fixed magnet , a coil mounted parallel to the magnet plane with the possibility of radial movement and a rotating holder of the percussion instrument with two supporting points bearings, while the carriage with the shock mechanism attached to it is kinematically connected to the belt of the drive device for vertical movement along the Z axis through the preload spring, on which a control plate is installed, which interacts with the position sensors of the shock mechanism carriage, and the print head control unit is connected by feedback to an additional device control unit.