KR20160001434A - A Chuck for clamping machine work - Google Patents

Abstract

The present invention relates to a chuck for mounting a workpiece comprising: a chuck body: and a base jaw which is installed on the chuck body. The chuck body is manufactured by one or more materials selected from a group composed of an aluminum alloy, a titanium alloy, a magnesium alloy, and a carbon composite fiber and comprises a first reinforcement part located along the outer surface of the chuck body. Therefore, the present invention prevents the outer shape of the chuck body from becoming deformed by supporting the outer shape of the chuck body through the reinforcement part located in a certain area on the outer surface of the side of the chuck body.

Description

[0001] The present invention relates to a chuck for clamping machine work,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece mounting chuck, and more particularly, to a workpiece mounting chuck having a reduced weight.

The most commonly used machine tools for machining workpieces are shelves, which are classified as manually operated general purpose lathes (manual lathes), automatically operated numerical control lathes and computer numerically controlled lathes .

Especially, computer numerical control lathes called as CNC lathes are machine tools equipped with a controller on a universal lathe, and can automatically process various parts by a program.

The computer numerical control shelf is composed of a controller, which is an electronic device that can automatically operate the machine, and a machine body, which controls the operation of the machine body by a CNC system program, a PLC program, The main body is composed of a head stock, a chuck, a tool post, a tail stock, a bed, a carriage, a transfer device, a hydraulic device, etc., .

In this case, the lathe chuck is provided at the end of the main shaft and grasps the object to be processed. The lathe chuck may be formed of a chuck, a pneumatic chuck, a hydraulic chuck, a collet chuck, a magnetic chuck, and the workpiece jaw is moved in conjunction with each other to grip the object to be processed.

On the other hand, most of the chucks are made of alloy steel for machine structure or carbon steel for machine structure. However, alloy structural steel and carbon steel have a specific gravity of about 7.77, and since the material is heavy, the equipment (machine tool) is also increased, and the electric power used is also increased, which is inefficient.

Also, in recent trends of high-speed processing, a heavy-weight chuck has a problem that it can not be used for a long time because an inertial load applied to a machine motor increases.

An object of the present invention is to provide a workpiece mounting chuck capable of reducing a chuck weight.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, the present invention provides a chuck body; And a base jaw provided on the chuck body, wherein the chuck body is made of at least one material selected from the group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy, and a carbon composite fiber, And a first reinforcing portion that is located on the first reinforcing portion.

Further, the present invention provides the workpiece mounting chuck wherein the first reinforcing portion is located along a partial area of the side outer circumferential surface of the chuck body.

The first reinforcing portion may include a side first reinforcing portion located along the entire surface of the side surface of the chuck body and a first surface reinforcing portion located along the entire surface of the upper surface of the chuck body. Chuck.

Further, the present invention provides a workpiece mounting chuck, further comprising a second reinforcing portion located along the inner circumferential surface of the chuck body.

In addition, the present invention provides the workpiece mounting chuck, wherein the second reinforcing portion includes a second guide portion reinforcing portion located in the guide portion region and a second wedge plunger reinforcing portion located in the wedge plunger region.

Further, the present invention provides a workpiece mounting chuck, wherein the chuck body includes a screw fastening groove located in a predetermined area of the upper surface, and further includes a third reinforcing portion in a predetermined area of the screw fastening groove.

Further, the present invention provides a workpiece mounting chuck, wherein the reinforcing portion is made of stainless steel, alloy steel for machine structure, or carbon steel for machine structure.

According to the present invention as described above, a light weight chuck can be constituted by constructing a chuck body from an alloy steel for mechanical structure and an aluminum alloy material having a specific gravity lower than that of carbon steel.

Accordingly, as the weight of the chuck is reduced, the size and installation space of the equipment (machine tool) can be reduced as well as the load and the load applied to the equipment can be reduced, so that the power consumption can be reduced. Can be increased.

In addition, according to the present invention, the outer shape of the chuck body can be prevented from being deformed by supporting the outer shape of the chuck body through a reinforcing part located in a certain region of the outer peripheral surface of the chuck body.

FIG. 1A is an exploded perspective view of a workpiece chuck according to a first embodiment of the present invention, FIG. 1B is an overlapping plan view of a workpiece chuck according to a first embodiment of the present invention, FIG. FIG. 2 is a schematic view showing a workpiece mounting chuck according to FIG.
FIG. 2A is an exploded perspective view showing an example of a base jaw and a top jaw of a workpiece chuck according to the first embodiment of the present invention, FIG. 2B is a perspective view of a base jaw and a top of a workpiece chuck according to the first embodiment of the present invention, It is a combined perspective showing an example of Joe.
3 is a schematic view showing a workpiece mounting chuck according to a third embodiment of the present invention.
4A and 4B are conceptual diagrams for explaining a workpiece mounting chuck according to a third embodiment of the present invention.
FIG. 5A is a schematic cross-sectional view showing a screw coupling groove according to an embodiment of the present invention, FIG. 5B is a schematic cross-sectional view showing a screw coupling groove according to another example of the present invention, Fig. 3 is a schematic cross-sectional view showing a screw engagement groove according to the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" And can be used to easily describe a correlation between an element and other elements. Spatially relative terms should be understood in terms of the directions shown in the drawings, including the different directions of components at the time of use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term "below" can include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1A is an exploded perspective view of a workpiece chuck according to a first embodiment of the present invention, FIG. 1B is an overlapping plan view of a workpiece chuck according to a first embodiment of the present invention, FIG. FIG. 2 is a schematic view showing a workpiece mounting chuck according to FIG. For convenience of explanation, only one chuck described later is shown in the perspective view of FIG. 1A, and three chucks are combined in a plan view of FIG. 1B.

The workpiece mounting chuck 100 according to the present invention may be installed at a predetermined end of a main shaft (not shown) of the lathe and may be rotated together with the main shaft while grasping an object to be processed.

1A and 1B, a workpiece mounting chuck 100 according to a first embodiment of the present invention includes a chuck body 200 installed at a predetermined end of a main shaft of a lathe and integrally rotated, 200 and a base jaw 300 that moves in a radial direction on the chuck body 200.

The workpiece chuck 100 according to the present invention forms a basic body. The chuck body 200 includes a main body (not shown) of a general purpose lathe (manual lathe), a numerical control lathe or a computer numerical control lathe And can be rotated integrally with the main shaft.

The chuck body 200 includes a guide part 210 for guiding the movement of the base jaw 300. The guide part 210 may be formed in a plurality of spaces while maintaining a predetermined gap therebetween.

In this case, although the figure shows that the number of the guide portions is three, the number of the guide portions may be at least two or more, and thus the number of the guide portions is not limited in the present invention.

The guide part 210 may include a sliding part 211 for supporting the support part 330 of the base jaw 300 to be described later and guiding the base jaw to move.

The sliding portion 211 may include a first sliding portion 211a located on the first side of the guide portion and a second sliding portion 211b located on the second side of the guide portion. The first supporting portion 330a of the base jaw 300 contacts the first sliding portion 211a and the second supporting portion 330b of the base jaw 300 contacts the second sliding portion 211b, The jaws can move along the guide portion.

1A and 1B, the jaw 300 is moved in the radial direction on the chuck body 200 to enable movement of a top jaw, which will be described later. The chuck body 200, The guide part 210 may be provided to be movable.

The base jaw 300 includes a body 310 forming a body, a fastening part 320 fastened to a T-nut, which is located in a predetermined region of the body, and a body 320 extending from the body, (Not shown).

The support portion 330 includes a first support portion 330a extending to the first side of the body portion and a second support portion 330b extending to the second side of the body portion. The first supporting portion 330a contacts the first sliding portion 211a and the second supporting portion 330b of the base jaw 300 contacts the second sliding portion 211b, It can move along the part.

Although not shown in the drawing, the base jaw 300 can move radially inward or outward along the guide portion 210 by pneumatic or hydraulic interlocking or mechanical interlocking such as a scroll, A universal lathe (manual lathe), a numerical control lathe, and a computer numerical control lathe, and the detailed description thereof will be omitted below.

That is, the base jaw 300 transfers all the known structures in the fields of a universal lathe (manual lathe), a numerical control lathe, and a computer numerical control lathe by transporting a top jaw to be described later radially inward or outward .

Here, in the present invention, the chuck body 200 is made of at least one material selected from the group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy, and a carbon composite fiber.

Most of the common chucks are made of alloy steel for machine structural use or carbon steel for mechanical structure. However, alloy structural steel and carbon steel have a specific gravity of about 7.77, and since the material is heavy, the equipment (machine tool) is also increased, and the electric power used is also increased, which is inefficient.

However, in the present invention, the chuck body is constituted by at least one material selected from the group consisting of the alloy steel for machine structure and the aluminum alloy, titanium alloy, magnesium alloy and carbon composite fiber having lower specific gravity than carbon steel, can do.

Accordingly, as the weight of the chuck is reduced, the size and installation space of the equipment (machine tool) can be reduced as well as the load and the load applied to the equipment can be reduced, so that the power consumption can be reduced. Can be increased.

In addition, high-speed machining is required to process hard-to-cut special materials such as aircraft parts. The most important factor in high-speed machining corresponds to the weight of the object to be rotated. It is possible to provide an easy lightweight chuck.

In addition, machinability of the material is better than machinability of alloy steel and carbon steel for mechanical structure, so that productivity improvement of the chuck can be expected.

Meanwhile, as described above, in the present invention, the chuck body 200 is preferably made of at least one material selected from the group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy, and a carbon composite fiber.

A chuck body of such a material can constitute a light chuck, but its strength or rigidity is low, and abrasion can easily occur.

Such abrasion may cause a change in the outer shape of the chuck body, and the rotation characteristics of the chuck body may be different due to the change of the outer shape.

For example, the external shape of the chuck body between the guide part 210 and the guide part 210 may be different from each other. Due to the characteristics of the chuck body which rotates at a high speed, Thereby causing a problem in high-speed rotation.

Accordingly, the workpiece mounting chuck 100 according to the first embodiment of the present invention may include a first reinforcing part 220 located along the outer circumferential surface of the chuck body 200.

The outer circumferential surface of the chuck body 200 may be defined as a surface on which the chuck body is exposed to the outside. In contrast, the outer circumferential surface of the chuck body 200 may be defined by a region where the guide portion 210 or the sliding portion 211 is located, The wedge plunger arrangement region can be defined as the inner peripheral surface of the chuck body.

The first reinforcing portion may be located along the side surface of the chuck body 200. The side surface of the chuck body may be defined as a surface located on the side surface of the chuck body exposed to the outside. The surface in the direction in which the screw engagement groove 213 to be described later is located can be defined as the upper surface outer peripheral surface of the chuck body.

As will be described later, the first reinforcing portion 220 may be stainless steel, alloy steel for machine structure, or carbon steel for mechanical structure, for reinforcing strength or rigidity.

At this time, since the side surface of the chuck body 200 has a curved surface, the first reinforcing portion 220 may have a curved surface.

The first reinforcing part 220 is located in a predetermined region of the side surface of the chuck body 200 and supports the outer shape of the chuck body 200, so that the outer shape of the chuck body 200 can be prevented from being deformed.

In addition, the user can check whether the outer shape of the chuck body has been deformed or not according to the state of the first reinforcement unit 220, thereby checking the chuck body replacement time.

Therefore, in the first embodiment of the present invention, the outer shape of the chuck body can be prevented from being deformed by supporting the outer shape of the chuck body through the first reinforcing portion located along the outer peripheral surface of the chuck body, The state of the first reinforcing portion can be checked to confirm the replacement time of the chuck body.

In addition, the first reinforcing portion can be utilized not only as a surface for circumferential shaking measurement when the shaking of the chuck and the main spindle of the apparatus, but also as a protection against surface damage due to debris and byproducts during processing.

1A, the first reinforcing part 220 is located along a part of the outer circumferential surface of the chuck body. Alternatively, the reinforcing part according to the present invention may include a first reinforcing part 220, Lt; / RTI >

That is, as shown in FIG. 1C, which is a schematic view showing a workpiece mounting chuck according to a second embodiment of the present invention, a second reinforcing portion 221 is disposed along the entire surface of the outer circumferential surface of the chuck body In FIG. 1C, for convenience of explanation, only the second reinforcement region is shown except for the portion of the chuck body.

As described above, the outer circumferential surface of the chuck body can be defined as a surface where the chuck body is exposed to the outside, and the outer circumferential surface of the chuck body can be divided into a side outer circumferential surface and an upper surface outer circumferential surface.

Accordingly, the workpiece mounting chuck according to the second embodiment of the present invention includes: a side surface second reinforcing portion 221a positioned along the entire surface of the side surface of the chuck body; And the upper surface second reinforcing portion 221b.

As described above, since the second reinforcing portion 221 is located in a certain region of the outer circumferential surface of the chuck body 200 and supports the outer shape of the chuck body, it is possible to prevent the outer shape of the chuck body from being deformed .

In addition, the user can check whether the outer shape of the chuck body has been deformed or not according to the state of the second reinforcing part, thereby checking the chuck body replacement time.

On the other hand, in the case of the second reinforcing portion located along the entire surface of the outer peripheral surface of the chuck body, the uniformity of the surface roughness over the entire area of the outer peripheral surface of the chuck body can be secured.

For example, when performing various surface treatment operations on the outside of the chuck body, there is a certain error in the surface roughness on each outer circumferential surface due to non-uniformity of the surface treatment operation.

However, in the present invention, uniformity of surface roughness can be secured by positioning the second reinforcing portion over the entire surface of the outer peripheral surface of the chuck body.

In addition, when the second reinforcing portion is located over the entire surface of the outer peripheral surface of the chuck body, the second reinforcing portion may protect the contour of the chuck body.

That is, since the material of the chuck body described above is weak in strength or rigidity, damage may occur to the outer shape of the chuck body, for example, the side surface, due to fragments generated during the operation.

However, when the second reinforcing portion of the stainless steel, the alloy steel for machine structural structure, or the carbon steel for mechanical structure is located on the outer circumferential surface of the chuck body, the second reinforcing portion serves as a defense against the debris, .

FIG. 2A is an exploded perspective view showing an example of a base jaw and a top jaw of a workpiece chuck according to the first embodiment of the present invention, FIG. 2B is a perspective view of a base jaw and a top of a workpiece chuck according to the first embodiment of the present invention, It is a combined perspective showing an example of Joe.

2A and 2B, a workpiece mounting chuck according to a first embodiment of the present invention includes a base jaw 300 and a top jaw 350, and is configured to fasten the base jaw and the top jaw And may include a T-nut 340.

As described above, the base jaw 300 includes a body 310 forming a body, a fastening part 320 fastened to a T-nut, which is located in a predetermined region of the body, And a support portion 330 for supporting the body portion 330. The support portion 330 includes a first support portion 330a extending toward the first side of the body portion and a second support portion 330b extending toward the second side of the body portion, .

The top jaw 350 includes a body portion 351 forming a body, a grip portion 352 for gripping an object to be processed or releasing gripping of an object to be processed, and a fastening hole 353 for fastening with a T- .

The T-nut 340 includes a body portion 342 forming a body, protrusions 341a, 341b, and 341 for fastening with the fastening portions of the base jaws, (343).

That is, the protrusion of the T-nut is inserted and supported in the coupling part of the base jaw, and the fastening hole of the top jaw and the fastening groove of the T-nut are fastened by screws or bolts 360, Can connect the top jaw and the base jaw to each other.

The base jaws and top jaws described above are examples of the present invention. In the present invention, the base jaws and top jaws can be an integrated structure, and the base jaws and top jaws can be mutually connected through a t-nut In addition, it does not have a T-nut and can be simply fastened. Therefore, the present invention does not limit the configuration of the base jaw and the top jaw.

FIG. 3 is a schematic view illustrating a workpiece mounting chuck according to a third embodiment of the present invention, and FIGS. 4A and 4B are conceptual diagrams illustrating a workpiece mounting chuck according to a third embodiment of the present invention.

The workpiece chuck according to the third embodiment of the present invention may be the same as the first and second embodiments described above, except as described below. 4A and 4B, only a part of the workpiece mounting chuck is shown for convenience of explanation.

Referring to FIG. 3, the workpiece chuck according to the third embodiment of the present invention may include a third reinforcing part 230 positioned along the entire surface of the outer circumferential surface of the chuck body.

The third reinforcing part 230 includes a side third reinforcing part 230a positioned along the entire surface of the side surface of the chuck body and a third surface reinforcing part 230b located along the entire surface of the upper surface of the chuck body, . ≪ / RTI >

In this case, the side surface of the chuck body may be defined as a side surface of the surface exposed to the outside of the chuck body, and a surface in a direction in which a screw coupling groove 213 The outer circumferential surface can be defined as described above.

This is the same as in the second embodiment of the present invention, and therefore a detailed description thereof will be omitted.

3, the workpiece mounting chuck according to the third embodiment of the present invention may include a fourth reinforcing part 240 positioned along the inner circumferential surface of the chuck body.

As described above, the outer circumferential surface of the chuck body can be defined as a surface where the chuck body is exposed to the outside. In contrast, the region where the guide portion or the sliding portion is located or the region where the wedge plunger It can be defined as the inner circumference of the chuck body.

Referring to FIG. 4A, the fourth reinforcing part 240 may include a guide part (or sliding part) fourth reinforcing part 240a located in the guide part (or sliding part) And the wedge plunger fourth reinforcing portion 240b located in the wedge plunger region, as shown in FIG. 4B. The third reinforcing portion 230 and the fourth reinforcing portion 240 may have strength or rigidity Stainless steel, alloy steel for machine structure, or carbon steel for mechanical structure, which are the same as those described above, and thus a detailed description thereof will be omitted.

Therefore, in the third embodiment of the present invention, the strength or rigidity of the inner peripheral surface of the chuck body can be reinforced by placing the fourth reinforcing portion on the inner peripheral surface of the chuck body.

Fig. 5 shows a workpiece chuck according to a fourth embodiment of the present invention, which shows a cross section taken along the line I-I in Fig. 1a. The workpiece mounting chuck according to the fourth embodiment of the present invention only shows the screw fastening grooves that can be positioned in a certain region of the chuck body for the sake of convenience of description and the overall shape of the workpiece mounting chuck according to the first embodiment Chuck can be referred to.

5A is a schematic cross-sectional view illustrating a screw coupling groove according to an embodiment of the present invention, FIG. 5B is a schematic cross-sectional view illustrating a screw coupling groove according to another example of the present invention, FIG. 5C is a cross- Fig. 7 is a schematic cross-sectional view showing a screw coupling groove according to another example.

First, as shown in FIG. 1A and the like, the chuck body of the workpiece mounting chuck may include a screw coupling groove 213 located in a certain area on the upper surface.

In this case, the screw may include a head portion and a screw portion. Accordingly, the screw coupling groove 213 of the present invention may also include a screw head coupling groove 213a and a screw screw coupling groove 213b .

As described above, the chuck body may be made of at least one material selected from the group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy, and a carbon composite fiber. However, the chuck body may be easily worn due to its weak strength or rigidity.

For this reason, due to the screws fastened to the screw fastening grooves 213, the screw fastening grooves 213 can be easily worn, which may cause a loose screw to be loosened.

Therefore, in the present invention, the screw reinforcement groove 213 is prevented from being worn by including the fifth reinforcement portions 240, 250, and 260 in a certain region of the screw fastening groove 213.

5A, an example 240 of the fifth reinforced portion can be positioned over the entirety of the screw head coupling groove 213a and the screw screw coupling groove 213b. Further, as shown in FIG. 5B Another example 250 of the fifth reinforcing portion may be located only in the region of the threaded head engaging groove 213a and another example of the fifth reinforcing portion as shown in FIG. 260 are positioned over the entirety of the screw head coupling groove 213a and the screw screw coupling groove 213b so as to consider the step difference between the screw head coupling groove 213a and the screw screw coupling groove 213b And may be formed to have a predetermined thickness.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: workpiece mounting chuck 200: chuck body
210: guide portion 211: sliding portion
300: Base jaw 310: Body part
320: engaging portion 330:
220, 221, 230, 240, 250, 260:

Claims (7)

Chuck body; And
And a base jaw provided on the chuck body,
Wherein the chuck body is at least one material selected from the group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy, and a carbon composite fiber,
And a first reinforcing portion located along an outer peripheral surface of the chuck body. The method according to claim 1,
Wherein the first reinforcing portion is located along a partial area of a side outer peripheral surface of the chuck body. The method according to claim 1,
Wherein the first reinforcing portion includes a side first reinforcing portion located along a front surface of a side surface of the chuck body and a top surface first reinforcing portion located along a front surface of an upper surface of the chuck body. The method of claim 3,
And a second reinforcing portion located along the inner peripheral surface of the chuck body. 5. The method of claim 4,
And the second reinforcing portion includes a guide second reinforcing portion located in the guide portion region and a wedge plunger second reinforcing portion located in the wedge plunger region. The method according to claim 1,
Wherein the chuck body includes a screw engagement groove located in a predetermined area on an upper surface thereof,
Further comprising a third reinforcing portion in a certain region of the screw engagement groove. 7. The method according to any one of claims 1 to 6,
Wherein the reinforcing portion is made of stainless steel, alloy steel for machine structure, or carbon steel for machine structure.

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