RU174356U1 - Impact Engraving Device - Google Patents

Abstract

(57) The technical solution relates to engraving devices intended for machining surfaces of solid materials and containing mechanical elements for tracking the surface. A significant inequality of the friction force of the support is achieved, depending on the direction of movement. Impact engraving device is equipped with a diamond needle and contains a housing with a support sliding on the work surface. The support can be movably or motionlessly fixed to the housing or is integral with it. The support may have a fluoroplastic, caprolon or other polyamide surface.

Description

Impact Engraving Device

The field of technology.

The claimed technical solution relates to engraving devices designed for machining surfaces of solid materials and containing mechanical elements for tracking the surface.

The prior art.

Among the engraving devices with mechanical tracking of the processing surface, an engraving device is known (RF patent for invention No. 2505417, IPC B44B 3/00 (2006.01), 2014), which, like the claimed device, contains a housing with a stepping motor fixed in it, on the axis which is set drummer with a diamond needle. The first and second magnets are fixed to the drummer on opposite sides of the axis. The third and fourth magnets are fixed to the housing opposite the first and second magnets, respectively.

The known engraving device, in contrast to the claimed one, is equipped with a support wheel fixed to the housing. The bottom edge of the wheel is located below the housing.

The implementation of the support in the form of a wheel is the disadvantage of an engraving device-analogue. Using a metal bearing as a wheel leaves scratches (marks) on the polished surface of the stone.

With insufficient rigidity or vibration resistance of the frame of the engraving device, the wheels provoke a change in the trajectory of the engraving head, which leads to the formation of image defects - banding and wavy lines. This is due to the fact that the friction forces of the wheel along the path of its movement are significantly lower than the friction forces of the wheel when it is shifted perpendicular to the axis of rotation. With the slightest non-orthogonality of the axis of rotation of the wheel and the movement line of the engraving head, the latter begins to act with significant friction forces of the shear of the wheel, leading the head away from its constructive straight path. These forces are balanced by the elastic forces of the frame, which leads to the formation of the above-mentioned defects in the engraving.

Disclosure of a technical solution.

The technical problem to which the claimed technical solution is directed is to improve the quality of the engraving.

The technical result provided by the claimed technical solution is to reduce the significant inequality of the friction force of the support, depending on the direction of movement.

Another technical result is to increase the accuracy of engraving.

The third technical result is to simplify the design.

The essence of the invention lies in the fact that the impact engraving device comprises a housing with a support and a stepper motor, on the axis of which a drummer with a diamond needle is fixed. It differs in that the support is made sliding on the work surface.

The above essence is a combination of essential features of the claimed technical solution, ensuring the achievement of all the claimed technical results.

In special cases, it is permissible to carry out the technical solution as follows.

It is advisable to carry out the support from a material whose rigidity is less than the rigidity of the material being processed. The support can be made of fluoroplastic or caprolon. The support is preferably placed near the diamond needle.

The support can be fixedly fixed to the housing. Then the diamond needle is placed in the hammer with the possibility of movement in the vertical direction.

The support can be movably fixed to the housing with the possibility of movement in the vertical direction. In this case, the diamond needle can be placed in the hammer without the possibility of movement in the vertical direction.

The support may be an influx from below the body in the area of the hammer. It is desirable to perform the influx polished or with a fluoroplastic coating from below.

The support is preferably integral with the housing made of fluoroplastic or polyamide. The polyamide may be, in particular, caprolon.

The author of the claimed technical solution made prototypes of this solution, the tests of which confirmed the achievement of technical results.

A brief description of the drawings.

Figure 1 shows a diagram of an engraving device, side view, in FIG. 2 is a front view of the device, in FIG. 3 - diagram of the device according to example 4,

side view.

Options for the implementation of technical solutions.

The shock-engraving device comprises a stepper motor (2) fixed in the housing (1), on the axis (3) of which a horizontal hammer (4) is fixed with a diamond needle (5) (Fig. 1).

The drummer (4) during operation of the device performs angular oscillations around the axis (3), on which it is fixed (Fig. 2).

To prevent damage to the treated surface (10) during engraving, the housing (1) is equipped with a support (13), sliding on the treated surface. The lower edge of the support (13) is located below other points of the body (1) and below the end of the needle (5).

To prevent scratches and thus improve the quality of engraving, the support (13) should be made of a material having a stiffness less than the rigidity of the material being processed.

It is advisable to carry out the support (13) from a material having a low coefficient of friction on the material of the processed surface. For stone processing, for example, the support can be made of polymeric materials such as fluoroplast, or caprolon, or other polyamides.

The contact area of the support with the treated surface can be of any shape. But to ensure greater independence of the friction force of the support from the direction of motion, this contact area is preferably performed in the form of a circle.

The support (13) can be located anywhere in the housing (1). However, for the purpose of using an impact engraving device for processing curved surfaces, it is desirable to place a support (13) near the impactor (4).

The first (6) and second (7) permanent magnets are rigidly fixed to the hammer (4) to the right and left of the axis (3). Opposite the first magnet (6), a third permanent magnet (8) is fixed to the housing (1), and a fourth permanent magnet (9) is fixed to the housing (1), opposite the second magnet (7). The magnets are oriented relative to each other so that the first (6) and third (8), as well as the second (7) and fourth (9) magnets act against each other in pairs repulsive, and these repulsive forces of interaction of the magnets have a component lying in the plane of motion drummer (4). It is preferable to arrange the magnets so that the aforementioned repulsive forces of interaction of the magnets lie completely in the plane of movement of the striker (4).

It is advisable to place the first (6) and second (7) magnets equidistant from the axis (3). This allows you to use the same magnets as magnets (6, 7, 8, 9) and install the first (6) and third (8), as well as the second (7) and fourth (9) magnets at the same distance from each other. This ensures the unification of the claimed engraving device.

The first (6) and second (7) magnets can be placed relative to the axis (3) at different distances. However, in this case, it is necessary either to use different magnets (different in the generated magnetic field), or to place the magnets in pairs one-three and two-four at different distances from each other.

Examples of specific performance.

Example 1. The hammer (4) is located outside the housing (1) (Fig. 1, 2). The support (13) is a caprolon cylinder fixedly mounted on the housing (1) from below. To regulate the working gap between the end of the diamond needle (5) and the work surface (10), the needle (5) is placed in the hammer (4) with the possibility of movement in the vertical direction and fixed in the hammer (4) with a screw (not shown).

Example 2. The support (13) is an inflow from below the metal body (1) in the region of the hammer (4). The influx is polished or has a fluoroplastic coating on the bottom.

Example 3. The support (13) is made integral with the body (1) of fluoroplastic or polyamide (for example, caprolon), and has a square or rectangular contact spot with the treated surface.

Example 4. To enable the adjustment of the working gap between the end of the diamond needle (5) and the workpiece (10), the support (13) is fixed to the housing with the possibility of changing its position (Fig. 3). In this case, the support (13) is mounted on the housing (1) with the possibility of sliding up and down along its surface. From above, the support (13) abuts against the limit screw (15) screwed into the protrusion (16) of the housing (1).

In this case, the needle (5) is installed in the drummer (4) motionless.

The implementation of the structural elements of the claimed impact engraving device is not limited to the above examples. In particular, the design of the hammer may be different.

Work description.

When using a shock engraving device, it is freely mounted on the vertical axis of the engraving machine. Under the influence of gravity, the engraving device occupies a position on the work surface. In this case, the support (13) is mechanically in contact with the work surface (10).

In the initial position, the striker (4) is located horizontally and motionless, the interaction forces of the magnets (6, 7, 8, 9) are balanced.

Using a control controller, control pulses are applied to one of the motor windings (2). The selection of the winding to which such pulses are applied, as well as the duration of the pulses and the distance of the diamond needle (5) from the work surface (10), is made depending on the impact force that the diamond needle (5) must make on the work surface (10). The flow of current in the motor winding (2) causes its shaft to rotate (at a small angle). The drummer (4) also scrolls, and strikes with a diamond needle (5) on the work surface (10), on which the point remains from the impact.

The rotation of the striker (4) and the displacement of the magnets fixed on it (6, 7) leads to an imbalance in the forces of interaction of the magnets (6, 7, 8, 9). In this case, the resulting force of interaction of the magnets (6, 7, 8, 9) tends to return the striker (4) to its original position.

According to the decline of the control pulse, the rotation force of the shaft (3) of the motor (2) decreases to zero, and the resulting interaction force of the magnets (6, 7, 8, 9) returns the striker (4) to its original position.

When moving the impact-engraving device along the work surface (10), the supports (13) slide along this surface. The forces acting on the engraving device, perpendicular to the movement of the device, are much lower than in the prototype.

Industrial applicability.

The inventive engraving device is implemented using industrially produced devices and materials, can be manufactured at any engineering company and will be widely used in the field of engraving devices.

Claims (8)

1. Impact-engraving device containing a housing with a support and a stepper motor, on the axis of which a drummer with a diamond needle is fixed, characterized in that the support is made with the possibility of sliding on the work surface. 2. The device according to p. 1, characterized in that the support is made of a material having a stiffness less than the rigidity of the processed material. 3. The device according to claim 1, characterized in that the support is made of fluoroplastic or caprolon. 4. The device according to claim 1, characterized in that the support is located near the diamond needle. 5. The device according to claim 1, characterized in that the support is fixedly mounted to the body, and the diamond needle is placed in the hammer with the possibility of movement in the vertical direction. 6. The device according to claim 1, characterized in that the support is movably fixed to the body with the possibility of movement in the vertical direction, and the diamond needle is placed in the hammer without the possibility of moving in the vertical direction. 7. The device according to p. 1, characterized in that the support is made in the form of an influx from below in the region of the striker, while the influx is polished or has a fluoroplastic coating from below. 8. The device according to p. 1, characterized in that the support is made integral with the housing made of fluoroplastic, or polyamide, or caprolon.

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