WO2022131966A1

WO2022131966A1 - Device for adjusting the sharpening angle of a cutting blade of a tool

Info

Publication number: WO2022131966A1
Application number: PCT/RU2021/050422
Authority: WO
Inventors: Андрей Александрович ЛАНШАКОВ
Original assignee: Андрей Александрович ЛАНШАКОВ
Priority date: 2020-12-14
Filing date: 2021-12-08
Publication date: 2022-06-23

Abstract

A device for adjusting the sharpening angle of a cutting blade of a tool includes a body comprising at one of its ends an assembly for clamping the blade of a tool, which is configured in the form of two clamping jaws and a means for setting the distance therebetween, and an assembly for adjusting the sharpening angle, which comprises projecting members. The assembly for adjusting the sharpening angle comprises a rod fastened in the body, one part of said rod having a right-hand thread, and another part having a left-hand thread, wherein the rod can be rotated by means of a rotating element, and the projecting members are mounted on opposite ends of the rod for translational movement along the axis of the rod as it rotates, the assembly for adjusting the sharpening angle being configured for symmetrical extension of the projecting members.

Description

Device for adjusting the angle of sharpening the cutting edge of the tool

Technical field

The technical solution relates to the field of a grinding tool, in particular, to a device for adjusting the angle of sharpening of its cutting edge.

Prior Art

Depending on the purpose of using the cutting tool, an absolutely symmetrical cutting edge with the right sharpening angle can be an important criterion. Symmetrical descents of the cutting tool make it possible to achieve its direct movement inside the material being cut, being "stabilizers" of each other in motion. At the same time, maintaining a constant angle during sharpening is the most difficult technique in the technology of turning cutting tools. To achieve such constancy and ensure the identity of the angles of inclination on both sides of the blade to the grinding surface is possible only when using special tools that fix these angles.

A solution is known from the prior art, which is a device for sharpening a knife, made with the possibility of fixing its blade and adjusting the sharpening angle. Adjustment of the angle of inclination is carried out by means of retractable support ledges. The extension and fixation of the height of each ledge is carried out by a separate screw. Patent for invention No. CN 103862399, IPC B24D15/08, published on 08/03/2016.

The disadvantage of this technical solution is the inability to achieve symmetry of the leads that form the sharpening angle. In this device, to change the height of the protrusion, it is necessary to make two adjustments for each protrusion. Considering that the sharpening of the cutting edge is characterized by the need to set an exact angle, identical on both sides, it is impossible to achieve high quality processing using such a device.

Also known is a technical solution chosen as the closest analogue, which is a device for sharpening a knife, including a housing with clamping jaws for fixing the blade and a sharpening angle adjustment unit made in the form of a flexible support rod, at the ends of which wheels are fixed. The sharpening angle can be adjusted by changing the height of the support rod or its angle of inclination. The device is also equipped with means for indicating the angle of inclination. Patent Application No. CN 107775461, IPC B24B3/36, published on 03/09/2018.

The disadvantage of this device is the absence of a mechanism for simultaneous adjustment of the heights of the support rod on both sides relative to the housing. Here, the adjustment of the sharpening angle must be controlled throughout the entire sharpening process, making a fine adjustment of the inclination of the device, focusing on the readings of the display means.

Distinctive features of the proposed technical solution are the execution of the sharpening angle adjustment unit including a metal rod, one part of which is made with a right-hand thread, the other part with a left-hand thread, fixed in the housing, rotatable by means of a rotating element rigidly fixed to the central part of the rod, the protrusions are mounted on corresponding parts of the rod from its opposite ends with the possibility of translational movement along its axis when the rod rotates, while the sharpening angle adjustment unit is made with the possibility of protrusions symmetrically relative to the axis of the plane of the tool being sharpened.

Disclosure of invention The technical result of the proposed technical solution is manifested in improving the accuracy of adjusting the angle of sharpening of the cutting edge of the tool.

The accuracy of adjusting the angle of the device is achieved, in particular, due to the smooth, uniform, symmetrical and simultaneous extension of the protrusions relative to the body axis; due to the possibility of smooth movement of the protrusions relative to the working surface; due to the possibility of elongation of the device along the axis of the body.

The technical result is achieved by the fact that in the device for adjusting the sharpening angle of the cutting edge of the tool, which includes a housing containing at one of its ends a tool blade clamping unit made in the form of two clamping jaws, and a distance lock between them, a sharpening angle adjustment unit, including protrusions , the sharpening angle adjustment unit includes a rod fixed in the body, one part of which is made with a right-hand thread, the other part with a left-hand thread, made with the possibility of rotation by means of a rotating element rigidly fixed to the central part of the rod, and the protrusions are mounted on opposite ends of the rod with the possibility of translational movement along the axis of the rod during its rotation, while the sharpening angle adjustment unit is made with the possibility of protrusions symmetrically relative to the body axis. The protrusions can be made in a form that prevents their rotation relative to the body under the action of the rotation of the rod and contain a thread on the inner surface corresponding to the thread on the rod. The protrusions can be made multifaceted. The protrusions can be mounted on the rods by means of elements with an internal thread corresponding to the thread on the rod, while the protrusions are made in a form that prevents them from rotating relative to the housing under the action of rotation. Lugs can be mounted on rods by means of elements with internal threads, the corresponding thread on the rod, which are made in a form that prevents them from rotating relative to the body under the action of the rotation of the rod. The rotating element can be made in the form of a wheel, while a groove is made in the housing corresponding to its profile. The opposite ends of the protrusions can be made rounded. The body can be configured to locate the goniometer on both sides of the body by means of an element that limits the movement of the goniometer, made in the form of a side wall, located on each surface of the body. The clamping unit of the tool blade can be made as a composite, from two connected pairs of clamping jaws. The body can be made of two sliding parts connected to each other by means of connection elements made with the possibility of fixing the parts of the body.

Due to the fact that the sharpening angle adjustment unit includes a rod, one part of which is made with a right-hand thread, the other part with a left-hand one, and the protrusions are fixed on the corresponding parts of the rod from opposite ends with the possibility of translational movement along its axis, symmetrical and simultaneous extension of the protrusions is carried out rotation of one rotating element. At the same time, since the distance to which the protrusion is extended determines the angle of inclination of the cutting tool approach, one operation of rotating the rotating element finely adjusts the angle of inclination of both inlets, and, accordingly, the sharpening angle with a symmetrical design of the cutting edge.

To enable translational movement of the protrusions along the axis of the rod during its rotation, the protrusions can be made in a form that prevents their rotation relative to the body under the action of the rotation of the rod and contain a thread on the inner surface corresponding to the thread on the rod. For example, protrusions can be made multifaceted, in particular, tetrahedral, which does not allow them to rotate together with the rotating rod, while maintaining a uniform translational motion. The protrusions can be made hollow.

The translational movement of the protrusions along the axis of the rod during its rotation can also be ensured by installing the protrusions on the rods by means of elements with an internal thread corresponding to the thread on the rod, while the protrusions are made in a shape that prevents them from rotating relative to the body under the action of rotation. Or elements with an internal thread corresponding to the thread on the rod are made in a form that prevents them from rotating relative to the body under the action of the rotation of the rod.

The rotating element can be made in the form of a wheel. At the same time, the groove corresponding to the profile of the wheel allows you to clearly position the wheel relative to the device.

The rod and the rotating element can be fixed with a fastening element in the form of a bolt, which ensures the rigidity of their connection, which is necessary for instantly bringing the rod to coaxial rotation under the action of the rotation of the rotating element. This design determines the smooth extension of the protrusions when turning the rotating element.

The rounding of the opposite ends of the protrusions ensures smooth movement of the device during sharpening due to the sliding of the protrusions relative to the working surface.

The housing can be configured to locate the goniometer on both sides of the housing by means of an element that limits the movement of the goniometer, made in the form of a side wall, located on each surface of the housing, which will allow you to determine and control the required precise sharpening angle.

The housing can be made of two parts connected to each other by means of a connection element, while the connection element made with the possibility of moving apart the parts in the longitudinal direction of the body, which allows you to adjust the length of the device, that is, the distance from the center of the rod to the end of the clamp assembly. This distance determines the sharpening angle, and its increase allows finer adjustment of the sharpening angle by increasing the distance to which the protrusions must be extended to achieve the required angle, that is, it reduces the sharpness of the change in the adjustable angle under the action of the rotation of the rotating element. Thus, the device has a shortened and elongated state. This advantage is also facilitated by the fact that the clamp assembly is made up of two connected pairs of clamping jaws.

Brief description of the drawings

The claimed technical solution is further explained with the help of figures, which conditionally represent one of the possible versions of the device for adjusting the angle of sharpening of the cutting edge of the tool.

In FIG. 1 shows a view of a device for adjusting the sharpening angle of the cutting edge of a tool in a shortened state from above and partially in section.

In FIG. 2 shows a view of the device for adjusting the angle of sharpening of the cutting edge of the tool in a shortened state from the side and partially in section.

In FIG. 3 shows a view of the device for adjusting the angle of sharpening of the cutting edge of the tool in an elongated state from above and partially in section.

In FIG. 4 shows a view of the device for adjusting the angle of sharpening of the cutting edge of the tool in an elongated state from the side and partially in section.

In FIG. 1-4 shows a device (1) for adjusting the angle of sharpening of the cutting edge of the tool, including: - a body made of two parts: (2) - a sharpening angle adjustment unit and (3) - a clamping unit for blades connected to each other by means of connection elements (4);

- the assembly (3) of the tool blade clamp is made in the form of clamping jaws (5) and a lock (6) of the distance between them;

- the sharpening angle adjustment unit (2) includes protrusions (7);

- rod (8);

- rotating element (9);

- fastening element (10), fixing rod (8) and rotating element (9);

- elements (11) for fastening protrusions with internal thread;

- element (12), limiting the movement of the goniometer.

Embodiments of the invention

Next, with reference to the figures, the design of the device (1) for adjusting the sharpening angle of the cutting edge of the tool is described.

The device (1) for adjusting the sharpening angle of the cutting edge of the tool includes a housing.

At one end of the housing there is a tool blade clamp assembly (3) made in the form of clamping jaws (5) and a clamp (6) for the distance between them.

The device (1) contains a node (2) for adjusting the angle of sharpening. The assembly includes a rod (8), mainly metal, one part of which is made with a right-hand thread, the other part with a left-hand thread.

The thread in the claimed design of the device can be made with any number of steps and any cycle.

In the central part of the rod (8) a rotating element (9) is rigidly fixed by means of a fastening element (10), for example, a bolt. In this case, the central part should be understood as the region of the rod (8) enclosed between its threaded parts. Protrusions (7) are fixed on the corresponding parts of the rod (8) from its opposite ends, with the possibility of translational movement along its axis. Preferably, the protrusions (7) are fixed on the rod (8) by means of elements (11) with internal threads, such as nuts, corresponding to the parts of the rod (8) with right and left threads.

The protrusions (7) are placed perpendicular to the plane of contact of the clamping jaws (5), in other words, the plane of the tool being sharpened. The sharpening angle adjustment unit is made with the possibility of symmetrical, relative to the body axis, protrusions (7).

Preferably, the housing has a groove corresponding to the profile of the rotating element (9), preferably made in the form of a wheel.

Preferably, the protrusions (7) are multifaceted, with rounded opposite ends.

The housing is configured to locate the protractor on both sides of the housing by means of an element (12) limiting the movement of the goniometer, made in the form of a side wall, located on each surface of the housing. A smartphone that supports the corresponding function can be used as a goniometer.

The housing is preferably made of plastic and includes rigid elements fixed in the knife blade clamp assembly.

The tool blade clamp assembly can be made with the possibility of locking and unlocking by means of a device for tightening the latch (6).

The clamping unit of the tool blade can be made as a composite, from two connected pairs of clamping jaws (5).

The body can be made of two parts connected to each other by means of connection elements (4), while one part can move relative to the other part in a longitudinal, relative to body, direction to increase the length of the device (1). The parts can be connected to each other, for example, by means of protrusions made on one part located in grooves made on another part of the body. In this case, the protrusions can move in the grooves in the longitudinal direction, thereby shortening or lengthening the body length, and the body parts can be fixed to each other in the extreme positions corresponding to the shortened and elongated states of the device (1) by an additional fastening element.

It should be noted that the design of the device (1) shown in the figures is not limited to this option. The body can also be made in one piece, without the possibility of extension, but contain both parts, without the possibility of increasing or decreasing the distance between them, that is, between the tool blade clamping unit (3) and the sharpening angle adjustment unit (2).

The device (1) may also include an element for fixing the musat, made on the protrusions (7).

One of the preferred options for using the device (1) for adjusting the sharpening angle of the cutting edge of the tool is shown below with an example.

The required angle of the cutting edge is set based on the purpose of the cutting tool and its area of application.

The blade to be sharpened is fixed in the clamp assembly between the clamping jaws (5).

By rotating the rotating element (9), the angle of inclination of the body to the plane of the grinding device, for example, a grindstone, is adjusted: the rotating element (9) rotates the rod (8). Since the protrusions (7) are made in a form that prevents them from rotating relative to the body when the rod rotates, the protrusions perform translational movement along the thread of the rod (8) by moving elements (11) along the thread of the rod, towards opposite ends. The resulting angle of inclination of the body relative to the plane of the grindstone determines the angle of inclination of the blade approach, and, accordingly, is equal to half the angle of sharpening the cutting edge. This angle remains constant, since the blade is fixed in the tool blade clamp assembly, and the protrusions make it possible to keep the angle of inclination of the device body (1) constant relative to the plane of the grindstone or wheel.

After processing the blade on one side of it, the device (1) is turned over without removing the blade and without additional adjustment of the angle of inclination, the other side of the blade is processed.

Industrial Applicability

The proposed solution can be used in industrial plants and for domestic use for fixing the blade to be turned and adjusting the sharpening angle. The device for adjusting the angle of sharpening of the cutting edge of the tool ensures that a constant angle is maintained during sharpening and the angles of inclination on both sides of the blade to the grinding surface are identical.

The presented figures, description of the design and use do not exhaust the possible options for execution and do not limit in any way the scope of the claimed technical solution. Other variants of execution and use within the scope of the claimed formula are possible. Depending on the purpose, devices for adjusting the angle of sharpening the cutting edge of the tool can be made in different sizes, colors and configurations.

Claims

Claim

1. A device for adjusting the sharpening angle of the cutting edge of a tool, including a housing containing at one of its ends a tool blade clamping assembly made in the form of two clamping jaws and a distance lock between them, a sharpening angle adjusting assembly including protrusions, characterized in that the sharpening angle adjustment unit includes a rod fixed in the body, one part of which is made with a right-hand thread, the other part with a left-hand thread, made with the possibility of rotation by means of a rotating element rigidly fixed to the central part of the rod, and the protrusions are mounted on opposite ends of the rod with the possibility of translational movement along the axis of the rod during its rotation, while the sharpening angle adjustment unit is made with the possibility of protrusions symmetrically relative to the body axis.

2. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the protrusions are made in a form that prevents their rotation relative to the body under the action of the rotation of the rod and contains a thread on the inner surface corresponding to the thread on the rod.

3. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the protrusions are multifaceted.

4. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the protrusions are installed at the ends of the rod by means of elements with internal threads corresponding to the thread on the rod, while the protrusions are made in a shape that prevents them from rotating relative to the body under the action of rotation .

5. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the protrusions are mounted on rods by means of elements with an internal thread corresponding to the thread on the rod, which are made in a form that prevents them from rotating relative to the body under the action of the rotation of the rod.

6. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the rotating element is made in the form of a wheel, while a groove is made in the body corresponding to its profile.

7. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the opposite ends of the protrusions are rounded.

8. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the body is configured to locate the goniometer on both sides of the body by means of an element that limits the movement of the goniometer, made in the form of a side wall located on each surface of the body.

9. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the tool blade clamp assembly is made of two connected pairs of clamping jaws.

10. A device for adjusting the angle of sharpening the cutting edge of the tool according to claim 1, characterized in that the body is made of two sliding parts connected to each other by means of connection elements made with the possibility of fixing parts of the body.