RU238062U1 - IMPACT MECHANISM WITH YOKE-SPRING FOR ENGRAVING DEVICE - Google Patents

Abstract

The utility model relates to the tool industry, specifically to the structural elements of engraving devices intended for the artistic and decorative processing of various stones (marble, serpentine, basalt, granite, dolerite, etc.), as well as other materials, including plastic, glass, etc., namely, to the impact mechanism of the engraving device (machine), and can be used to decorate the facades of buildings and structures, monuments, interior decorations, by accurately transferring a verbal/graphic/photographic, etc. image from a copied original image to the surface of the product using the method of impact and impact-rotary engraving. The technical result achieved by the claimed technical solution consists in improving the quality of engraving, due to the provision of a collet for installing the impact needle in a perpendicular position relative to the workpiece, as well as in expanding the arsenal of technical means intended for the artistic and decorative processing of various materials. The technical result is achieved by a yoke-spring impact mechanism for an engraving device, comprising a yoke-spring with a uniformly beveled width and a collet secured to its narrow portion via a mounting hole, and containing openings in its wide portion. The narrow portion of the yoke-spring, with its mounting hole for the collet, is a horizontal platform, allowing the collet to be mounted on the yoke-spring at a 90° angle. The platform's thickness is less than that of the wide portion of the yoke-spring. The middle portion of the yoke-spring, connecting the horizontal platform for the collet with the wide portion, is uniformly beveled. The length of the wide portion of the yoke-spring ranges from 0.2 to 0.7 times the total length of the yoke-spring. The ratio of the thickness of the horizontal platform with the collet mounting hole to the thickness of the wide portion of the yoke spring is 0.3 to 0.8. The ratio of the width of the horizontal platform with the collet mounting hole to the wide portion is 0.5 to 0.8. In the preferred embodiment, the collet has a projection, a support, a collet clamp, grooves, a chamfer on the inside of the collet clamp, and a conical recess, with the number of grooves ranging from 2 to 6. The yoke spring can be designed with straight or curved bevels. The holes in the wide portion of the yoke spring can be oval.

Description

The utility model relates to the tool industry, namely to the structural elements of engraving devices intended for artistic and decorative processing of various stones (marble, serpentine, basalt, granite, dolerite, etc.), as well as other materials, including plastic, glass, etc., namely to the impact mechanism of the engraving device (machine), and can be used for the design of the facades of buildings and structures, monuments, interior decorations by accurately transferring a verbal/graphic/photographic, etc. image from a copied original image to the surface of the product using the method of impact and impact-rotary engraving.

Currently, the technology for automatically applying images to hard surfaces using impact engraving machines is rapidly developing. This raises the challenge of improving the quality, wear resistance, and durability of the tools used for applying images to hard surfaces using impact and rotary impact technologies.

From the existing level of technology, an engraving device is known, which includes a base with a fixed stand, to which a flat spring is attached at one end, and the other is connected to one of the ends of the yoke of an electromagnet, rigidly fixed to the base, to the other end of the yoke a collet is attached, in which a striking tool in the form of a needle with a diamond tip is installed (RU 96817, IPC B44B 3/00, published 20.08.2010).

The disadvantage of this technical solution is the large number of elements included in the device (flat spring, flat yoke, elements for fastening the yoke to the spring), which reduces the reliability of this unit and limits the frequency of oscillations due to its large weight.

From the existing level of technology, a striking mechanism with a yoke-spring is known for an engraving device, including a yoke-spring with a collet secured to its narrow part by means of a fastening hole, wherein the yoke-spring is made with a uniform bevel in thickness and width, the yoke-spring has holes in the wide part, and the collet has a projection, a support, a collet clamp, grooves, a chamfer on the inner side of the collet clamp, a conical recess (RU 234322, IPC B44B 3/00, published 05/27/2025).

The striking mechanism with a yoke-spring for an engraving device, described in utility model RU 234322 and shown in the explanatory drawings, chosen as a prototype, assumes a beveled thickness along the entire length of the narrow section of the yoke-spring, including at the location of the collet mounting hole, and the collet is secured to the beveled surface. This collet position does not ensure the required perpendicular position of the diamond impact stylus installed in the collet relative to the workpiece surface. Consequently, the diamond impact stylus strikes the workpiece surface (natural or artificial stone, glass, metal, etc.) not with the striking stylus tip, but rather with its side face. This circumstance negatively impacts the engraving quality and reduces the precision of image detail.

The position of the impact needle (striker) in the collet, located on the yoke-spring in an inclined position, leads to uneven contact of the needle edges with the material, uneven distribution of the impact and a decrease in the penetration depth of the impact needle into the material, which can lead to a shift in the engraving lines, deterioration in the readability of small-sized engraved elements, and the formation of irregularities and defects on the engraved image.

Also, placing the impact needle in an inclined position increases the load on one of the edges of the impact needle and reduces the working life of the diamond tip, which leads to its accelerated wear.

Oblique engraving also performs worse on hard surfaces (such as hard granite) where maximum precision is required, limiting the use of the prototype by type of material.

The objective of this utility model is to create a striking mechanism with a yoke-spring for an engraving device that ensures high speed of engraving images and reduces the inertia of the striking system of the device, due to the low weight of the device, as well as improving the quality and accuracy of engraving, and reducing wear of the striking needle (striker).

The technical result achieved by the claimed technical solution consists of improving the quality of engraving by ensuring that the collet for installing the impact needle is positioned perpendicular to the workpiece, as well as expanding the arsenal of technical means intended for the artistic and decorative processing of various materials.

The technical result is achieved by a yoke-spring impact mechanism for an engraving device, comprising a yoke-spring with a uniformly beveled width and a collet secured to its narrow portion via a mounting hole, and containing openings in its wide portion. The narrow portion of the yoke-spring, with its mounting hole for the collet, is a horizontal platform, allowing the collet to be mounted on the yoke-spring at a 90° angle. The platform's thickness is less than that of the wide portion of the yoke-spring. The middle portion of the yoke-spring, connecting the horizontal platform for the collet with the wide portion, is uniformly beveled. The length of the wide portion of the yoke-spring ranges from 0.2 to 0.7 times the total length of the yoke-spring. The ratio of the thickness of the horizontal platform with the mounting hole for installing the collet to the thickness of the wide part of the yoke spring is from 0.3 to 0.8. The ratio of the width of the horizontal platform with the mounting hole for installing the collet to the wide part is from 0.5 to 0.8.

In a preferred embodiment, the collet has a projection, a support, a collet clamp, grooves, a chamfer on the inside of the collet clamp, a conical recess, and the number of grooves is from 2 to 6.

The yoke spring can be made with straight or curved bevels. The holes on the wide part of the yoke spring can be oval.

Brief description of the drawings

Fig. 1 shows a side view of the impact mechanism with a yoke-spring for an engraving device with an impact needle installed in a collet,

where 1 is a yoke-spring; 2 is a wide part of the yoke-spring; 3 is a horizontal platform for installing the collet; 4 is a middle part of the yoke-spring connecting the horizontal platform for installing the collet with the wide part; 5 is a collet; 6 is a striking needle.

Fig. 2 shows a side view of the impact mechanism with a yoke spring for an engraving device,

where 1 is the yoke-spring; 2 is the wide part of the yoke-spring; 3 is the horizontal platform for installing the collet; 4 is the middle part of the yoke-spring, connecting the horizontal platform for installing the collet with the wide part; 5 is the collet.

Fig. 3 shows a top view of a yoke spring with rectilinear bevels across the width,

where 2 is the wide part of the yoke spring; 3 is the horizontal platform for installing the collet; 4 is the middle part of the yoke spring, connecting the horizontal platform for installing the collet with the wide part; 7 is the mounting hole for the collet; 8 are the mounting holes on the wide part of the yoke spring.

As shown in Fig. 1-3, the yoke-spring impact mechanism for the engraving device includes a yoke-spring (1) made with a uniform bevel across its width with a collet (5) secured to its narrow portion using a mounting hole (7). The mounting hole (7) is used to attach the collet (5) by welding or riveting. Holes (8) are made on the wide portion (2) of the yoke-spring.

In this case, as shown in Fig. 1-3, the narrow part of the yoke spring with a mounting hole (7) for installing the collet is a horizontal platform (3), which provides the possibility of installing the collet (5) on the yoke spring (1) at an angle of 90°, the thickness of which is less than the thickness of the wide part (2) of the yoke spring. In this case, the middle part (4) of the yoke spring, connecting the horizontal platform for installing the collet with the wide part, is made with a uniform bevel in thickness.

The ratio of the length of the wide part (2) of the yoke spring to the total length of the yoke spring (1) is from 0.2 to 0.7. The preferred ratio is 0.5.

The ratio of the thickness of the horizontal platform (3) with the mounting hole (7) for installing the collet (5) to the thickness of the wide part (2) of the yoke spring is from 0.2 to 0.8. The preferred ratio is 0.4.

The ratio of the width of the horizontal platform (3) with the mounting hole (7) for installing the collet to the wide part (2) of the yoke spring is from 0.5 to 0.8. The preferred ratio is 0.6.

The collet (5) is designed to accommodate an impact needle (tip) and has a projection, a support, a collet clamp, grooves for holding the impact needle, a chamfer on the inside of the collet clamp for easy installation of the impact needle in the collet clamp, a conical recess to simplify the riveting process to the yoke spring, while the number of grooves can be from 2 to 6.

The yoke spring (1) can be designed with bevels across its width, either in a straight or curved configuration. The holes (8) in the wide portion of the yoke spring can be oval.

The yoke spring 1 can be made of spring steel, for example, grades 60S2, 60G, 51KhFA, 60S2, 65G, 70S3A.

The device works as follows.

The impact needle is installed in the collet (5), secured by a horizontal platform (3). The narrow section of the yoke spring, being formed as a horizontal platform with a constant thickness, allows the collet (5) to be mounted on the yoke spring and, accordingly, the impact needle (6) at an angle of 90°. The impact mechanism with the yoke spring for the engraving device, after the working tool of the impact needle is installed in it, is secured to the base of the engraving device, where the pulse coil is installed, through an intermediate piece, parallel to the work table with the workpiece placed on it, and so that the center of the collet (4), where it is riveted, coincides with the center of the pulse coil core. When current is supplied to the electromagnet coil, the yoke spring (1) moves a certain amount toward the electromagnet core. This movement is proportional to the value of the current in the electromagnet coil and, accordingly, to the brightness of an elementary dot of the image being engraved. The energy of the electric current is converted into potential mechanical energy by the biased yoke spring (1). After the current is disconnected, the yoke spring (1), together with the collet (5) and impact pin, produces a mechanical impact on the workpiece being engraved with a force proportional to the energy accumulated by the yoke spring (1). Varying the thickness and width of the yoke spring (1) imparts elasticity to the yoke spring. In this case, the installation of the collet (5) on the yoke-spring (1) and, accordingly, the impact needle at an angle of 90°, allows for a perpendicular position of the needle in relation to the workpiece (natural or artificial stone, glass, metal, etc.), which also contributes to an improvement in the quality of the engraving, in particular, a uniform depth and clarity of lines is ensured due to the vertical, symmetrical penetration of the needle, deviations of the engraving shape from the given template are prevented, and the formation of irregularities and defects on the engraved image is eliminated due to the absence of lateral displacement of the needle.

Also, installing the collet (4) on the yoke-spring (1) and, accordingly, the impact needle at an angle of 90° ensures uniform distribution of the impact load across all edges of the needle, which increases its service life.

The claimed device can be industrially applied to engraving machines, such as machines and tools using impact or rotary impact engraving. For example, this device can be used in an engraving device according to utility model patent RU 224927, published April 9, 2024.

Thus, the claimed impact mechanism with a yoke-spring for an engraving device, in comparison with the known solution, ensures uniform depth and clarity of lines due to the vertical, symmetrical insertion of the needle, eliminates deviation of the engraving shape from the specified template, and eliminates the formation of irregularities and defects on the engraved image due to the absence of lateral displacement of the needle and, as a result, improves the quality of the engraving, which confirms the achievement of the stated technical result.

Claims (8)

1. A striking mechanism with a yoke-spring for an engraving device, including a yoke-spring made with a uniform bevel in width with a collet secured to its narrow part by means of a mounting hole and containing openings in the wide part, characterized in that the narrow part of the yoke-spring with a mounting hole for installing the collet is a horizontal platform that provides the possibility of installing the collet on the yoke-spring at an angle of 90°, the thickness of which is less than the thickness of the wide part of the yoke-spring, wherein the middle part of the yoke-spring, connecting the horizontal platform for installing the collet with the wide part, is made with a uniform bevel in thickness. 2. A striking mechanism with a yoke-spring for an engraving device according to paragraph 1, characterized in that the length of the wide part of the yoke-spring is from 0.2 to 0.7 of the total length of the yoke-spring. 3. A striking mechanism with a yoke-spring for an engraving device according to paragraph 1, characterized in that the ratio of the thickness of the horizontal platform with a mounting hole for installing the collet to the thickness of the wide part of the yoke-spring is from 0.3 to 0.8. 4. A striking mechanism with a yoke-spring for an engraving device according to paragraph 1, characterized in that the ratio of the width of the horizontal platform with a mounting hole for installing the collet to the wide part is from 0.5 to 0.8. 5. A striking mechanism with a yoke-spring for an engraving device according to paragraph 1, characterized in that the collet has a projection, a support, a collet clamp, grooves, a chamfer on the inside of the collet clamp, a conical recess, and the number of grooves is from 2 to 6. 6. A striking mechanism with a yoke-spring for an engraving device according to paragraph 1, characterized in that the bevels along the width are made in a rectilinear configuration. 7. A striking mechanism with a yoke-spring for an engraving device according to paragraph 1, characterized in that the bevels along the width are made in a curvilinear configuration. 8. A striking mechanism with a yoke-spring for an engraving device according to paragraph 1, characterized in that the openings on the yoke-spring are made in the form of two oval-shaped openings.