WO2015199335A1

WO2015199335A1 - Chuck for mounting workpiece

Info

Publication number: WO2015199335A1
Application number: PCT/KR2015/005230
Authority: WO
Inventors: 박명녀; 윤용선
Original assignee: 칸워크홀딩 주식회사
Priority date: 2014-06-27
Filing date: 2015-05-26
Publication date: 2015-12-30
Also published as: KR20160001434A

Abstract

The present invention relates to a chuck for mounting a workpiece, the chuck comprising: a chuck body; a base jaw installed on the chuck body; and a first reinforcing part positioned along the outer circumferential surface of the chuck body, wherein the chuck body is made of at least any one of materials selected from the group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy and a carbon composite fiber, and wherein the first reinforcing portion, which is positioned along a predetermined region of the outer circumferential surface of the side of the chuck body, supports the outer shape of the chuck body, thereby preventing the outer shape of the chuck body from being deformed.

Description

Workpiece mounting chuck

The present invention relates to a workpiece mounting chuck, and more particularly to a workpiece mounting chuck with reduced weight.

Among the most popular machine tools for mechanically machining workpieces are lathes, which are categorized as manually operated universal lathes (manual lathes), automatically operated numerically controlled lathes and computer numerically controlled lathes. Can be.

In particular, a computer numerical control lathe, called a CNC lathe, is a machine tool equipped with a controller on a general-purpose lathe, which has the advantage of being able to automatically machine various parts by a program.

The computer numerical control lathe consists of a controller which is an electronic device that can automatically operate the machine and a machine body which is a machine, where the controller controls the operation of the machine body by CNC system program, PLC program, etc. The main body is similar to the structure of the general-purpose lathe with head stock, chuck, tool post, tail stock, bed, shuttle, feeder, hydraulic system, etc. It is composed.

At this time, the lathe chuck is installed at the end of the spindle to hold the workpiece, and may be formed of a normal chuck, a pneumatic chuck, a hydraulic chuck, a collet chuck, a magnetic chuck, etc., usually three or four jaws. The jaw is formed in a structure that grips the object while moving in conjunction with each other.

On the other hand, most of the chuck is made of mechanical structural alloy steel or mechanical structural carbon steel. However, mechanical structural alloy steel and carbon steel have a specific gravity of about 7.77, and because of the heavy material, the equipment (machine tool) accordingly becomes large, and there is a problem that it is inefficient because the power used increases.

In addition, even in the aspect of high speed machining, which is a recent trend, the heavy material chuck has a problem that it cannot be used for a long time because the inertial load on the equipment motor becomes large.

An object of the present invention is to provide a workpiece mounting chuck that can reduce the chuck weight.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will 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 installed on the chuck body, wherein the chuck body is at least one material selected from the group consisting of aluminum alloy, titanium alloy, magnesium alloy, and carbon composite fiber, along the outer circumferential surface of the chuck body. Provided is a workpiece mounting chuck comprising a first reinforcing portion positioned.

In addition, the first reinforcing portion provides a workpiece mounting chuck positioned along a portion of the side outer peripheral surface of the chuck body.

In addition, the present invention is the first reinforcing portion for mounting the workpiece comprising a side first reinforcing portion located along the front surface of the side outer peripheral surface of the chuck body and an upper surface first reinforcing portion located along the front surface of the upper peripheral surface of the chuck body. Provide the chuck.

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

The present invention also provides a workpiece mounting chuck including a guide portion second reinforcement portion located in the guide portion region and a wedge plunger second reinforcement portion located in the wedge plunger region.

In another aspect, the present invention provides a chuck for mounting the workpiece further comprises a screw fastening groove located in a predetermined area of the upper surface, and further comprising a third reinforcement in a predetermined area of the screw fastening groove.

In another aspect, the present invention provides a workpiece mounting chuck, characterized in that the reinforcing portion is made of stainless steel, alloy steel for mechanical structure or carbon steel for mechanical structure.

According to the present invention as described above, by constructing the chuck body made of aluminum alloy material having a specific gravity lower than the mechanical structural alloy steel and carbon steel, it is possible to configure a lightweight chuck.

Therefore, as the weight of the chuck decreases, not only the size and installation space of the equipment (machine tool) can be reduced, but also the power and the life of the equipment can be reduced because the load and load on the equipment are reduced. Can increase.

In addition, in 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 reinforcement part positioned at a predetermined region of the side outer circumferential surface of the chuck body.

Figure 1a is an exploded perspective view of the workpiece mounting chuck according to the first embodiment of the present invention, Figure 1b is a plan view of the overlap of the workpiece mounting chuck according to the first embodiment of the present invention, Figure 1c is a second embodiment of the present invention Figure is a schematic diagram showing a workpiece mounting chuck according to.

Figure 2a is an exploded perspective view showing an example of the base jaw and the top jaw of the workpiece mounting chuck according to the first embodiment of the present invention, Figure 2b is a base jaw and top of the workpiece mounting chuck according to the first embodiment of the present invention It is a perspective view showing an example of a jaw.

Figure 3 is a schematic diagram showing a workpiece mounting chuck according to a third embodiment of the present invention.

4A and 4B are conceptual views for explaining a workpiece mounting chuck according to a third embodiment of the present invention.

Figure 5a is a schematic cross-sectional view showing a screw fastening groove according to an embodiment of the present invention, Figure 5b is a schematic cross-sectional view showing a screw fastening groove according to another embodiment of the present invention, Figure 5c is another example of the present invention Figure is a schematic cross-sectional view showing a screw fastening groove according to.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Regardless of the drawings, the same reference numbers refer to the same components, and “and / or” includes each and every combination of one or more of the items mentioned.

Although the first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, of course, the first component mentioned below may be a second component within the technical spirit of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises" and / or "comprising" does not exclude the presence or addition of one or more other components in addition to the mentioned components.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

The spatially relative terms " below ", " beneath ", " lower ", " above ", " upper " It can be used to easily describe a component's correlation with other components. Spatially relative terms are to be understood as including terms in different directions of components in use or operation in addition to the directions shown in the figures. For example, when flipping a component shown in the drawing, a component described as "below" or "beneath" of another component may be placed "above" the other component. Can be. Thus, the exemplary term "below" can encompass both an orientation of above and below. The components can be oriented in other directions as well, so that spatially relative terms can be interpreted according to the orientation.

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

Figure 1a is an exploded perspective view of the workpiece mounting chuck according to the first embodiment of the present invention, Figure 1b is a plan view of the overlap of the workpiece mounting chuck according to the first embodiment of the present invention, Figure 1c is a second embodiment of the present invention Figure is a schematic diagram showing a workpiece mounting chuck according to. For convenience of description, only one chuck is described below in the perspective view of FIG. 1A, and the chuck is coupled to the top 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 holding a workpiece.

First, referring to Figures 1a and 1b, the workpiece mounting chuck 100 according to the first embodiment of the present invention is installed on a predetermined end of the main shaft of the shelf chuck body 200, the chuck body (rotated integrally) A plurality is installed on the 200 and includes a base jaw 300 that moves in a radial direction on the chuck body (200).

The chuck body 200 is a workpiece mounting chuck 100 according to the present invention to form a basic body, although not shown, the main axis of the universal shelf (manual lathe), numerical control lathe or computer numerical control lathe (not shown) May be installed at the end and rotated integrally with the main shaft.

In addition, the chuck body 200 may include a guide part 210 for guiding the movement of the base jaw 300, and the guide part 210 may be formed in plural numbers while maintaining a predetermined interval.

At this time, in the drawing, but shown as three guide parts, in contrast, the guide may be at least two or more, therefore, the number of the guide portion in the present invention is not limited.

The guide part 210 may include a sliding part 211 that guides the base jaw to move while supporting the support part 330 of the base jaw 300 to be described later.

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

1A and 1B, the jaw 300 moves radially on the chuck body 200 and serves to enable the movement of the top jaw to be described later. The chuck body 200 The guide portion 210 of the can be installed to be movable.

The base jaw 300 is located in a body portion 310 constituting the body, a predetermined region of the body portion, extending from the fastening portion 320 and the body portion for fastening to the T-nut to be described later, and supports the body portion It includes a support 330 for.

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, and as described above, The first support part 330a contacts the first sliding part 211a, and the second support part 330b of the base jaw 300 contacts the second sliding part 211b, and the base jaw is guided. Can move along wealth.

On the other hand, although not shown in the figure, the base jaw 300 can be moved inward or outward in the radial direction along the guide portion 210 by the interlock of the mechanical interlocking configuration, such as pneumatic or hydraulic or scroll, Since it is already known in the fields of general purpose shelves (manual lathe), numerical control lathe and computer numerical control lathe, such a detailed description will be omitted.

That is, the base jaw (300) is to convey the top jaw to be described later inward or outward in the radial direction, and all configurations known in the fields such as universal lathe (manual lathe), numerical control lathe and computer numerical control lathe It may include.

At this time, the chuck body 200 in the present invention is composed of at least one material selected from the group consisting of aluminum alloy, titanium alloy, magnesium alloy and carbon composite fiber.

Most of the common chucks are made of mechanical structural alloy steel or mechanical structural carbon steel. However, mechanical structural alloy steel and carbon steel have a specific gravity of about 7.77, and because of the heavy material, the equipment (machine tool) accordingly becomes large, and there is a problem that it is inefficient because the power used increases.

However, in the present invention, by constructing the chuck body made of at least one material selected from the group consisting of aluminum alloys, titanium alloys, magnesium alloys and carbon composite fibers having a lower specific gravity than the mechanical structural alloy steels and carbon steels, a lightweight chuck is constructed. can do.

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

In addition, since the machinability of the material is superior to the machinability of alloy steel and carbon steel for mechanical structures, the productivity of the chuck can be expected to be improved.

On the other hand, 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 aluminum alloy, titanium alloy, magnesium alloy and carbon composite fiber.

The chuck body of such a material may constitute a lightweight chuck, but the strength or rigidity is low, and wear may easily occur.

Such wear may cause a change in the appearance of the chuck body, and due to the change of the appearance, rotation characteristics of the chuck body may be different.

For example, the outer shape of the chuck body between the guide unit 210 and the guide unit 210 may be different from each other, and the rotation characteristics are different according to the appearance of the chuck body that rotates at high speed. As a result, high speed rotation may be impeded.

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

In this case, the outer circumferential surface of the chuck body 200 may be defined as a surface in which the chuck body is exposed to the outside, and in comparison, an area in which the guide part 210 or the sliding part 211 is located or will be described later. The wedge plunger placement area can be defined as the inner circumferential surface of the chuck body.

In addition, the first reinforcing part may be located along the side outer circumferential surface of the chuck body 200, wherein the side outer circumferential surface of the chuck body is defined as a surface located on the side of the chuck body exposed to the outside. In contrast, the surface in the direction in which the screw fastening groove 213 is described below may be defined as the outer peripheral surface of the upper surface of the chuck body.

As described below, the first reinforcement part 220 may be made of stainless steel, mechanical structural alloy steel, or mechanical structural carbon steel, which is a material of a general chuck, for reinforcement of strength or rigidity.

At this time, since the outer peripheral surface of the side of the chuck body 200 forms a curved surface, the first reinforcing portion 220 may also form a curved surface in the present invention.

Since the first reinforcing part 220 is positioned at a predetermined region of the side outer circumferential surface of the chuck body 200 to support the outer shape of the chuck body, the outer shape of the chuck body can be prevented from being deformed.

In addition, the user may check whether the outer shape of the chuck body is deformed according to the state of the first reinforcing part 220, and thereby confirm the replacement timing of the chuck body.

Therefore, in the first embodiment of the present invention, not only 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 part positioned along the outer circumferential surface of the chuck body. By checking the state of the first reinforcing portion, it is possible to check the replacement time of the chuck body.

In addition, the first reinforcing part may be used as a surface for measuring the circumferential shake when catching the shake of the chuck and the main shaft of the equipment, and may be used as a protective surface against surface damage by debris and by-products during processing.

Meanwhile, in FIG. 1A, the first reinforcement part 220 is positioned along a partial region of the outer circumferential surface of the chuck body. Alternatively, the reinforcement part according to the present invention may have a front surface of the outer circumferential surface of the chuck body. Can be located across.

That is, as shown in Figure 1c which is a schematic diagram showing a workpiece mounting chuck according to a second embodiment of the present invention, it may include a second reinforcing portion 221 located along the entire surface of the outer peripheral surface of the chuck body In this case, in FIG. 1C, only the second reinforcement part is illustrated except for the part of the chuck body for convenience of description.

As described above, the outer circumferential surface of the chuck body may be defined as a surface in which the chuck body is exposed to the outside, and the outer circumferential surface of the chuck body may be divided into a side outer circumferential surface and a top outer surface.

Accordingly, the workpiece mounting chuck according to the second embodiment of the present invention is positioned along the front surface of the side second reinforcement part 221a positioned along the front surface of the side outer circumferential surface of the chuck body and the upper surface outer circumferential surface of the chuck body. The second reinforcement portion 221b may be included.

As described above, since the second reinforcement part 221 is positioned in a predetermined region of the outer circumferential surface of the chuck body 200 to support the outer shape of the chuck body, the outer shape of the chuck body can be prevented from being deformed. Can be.

In addition, the user can check whether the appearance of the chuck body is deformed according to the state of the second reinforcing part, and through this, it is possible to check the replacement time of the chuck body.

On the other hand, in the case of the second reinforcing portion located along the entire surface of the outer circumferential surface of the chuck body, it is possible to secure uniformity of surface roughness over the entire area of the outer circumferential surface of the chuck body.

For example, when various surface treatment work is performed outside the chuck body, a nonuniformity of the surface treatment work causes a certain error in the surface roughness on each outer circumferential surface.

However, in the present invention, the second reinforcing portion is positioned over the entire surface of the outer circumferential surface of the chuck body, thereby ensuring uniformity of surface roughness.

In addition, when the second reinforcing portion is located over the entire surface of the outer circumferential surface of the chuck body, the second reinforcing portion may serve to protect the appearance of the chuck body.

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

However, when the second reinforcing part made of stainless steel, mechanical structural alloy steel, or mechanical structural carbon steel is located on the outer circumferential surface of the chuck body, the second reinforcing part acts as a defensive part from debris, thereby causing damage to the chuck body contour. It can prevent.

2A and 2B, the workpiece mounting chuck according to the first embodiment of the present invention includes a base jaw 300 and a top jaw 350, for fastening the base jaw and the top jaw to each other. T-nut 340 may be included.

As described above, the base jaw 300 is located in the body portion 310 constituting the body, the predetermined portion of the body portion, extending from the fastening portion 320 and the body portion for fastening to the T-nuts to be described later And a support part 330 for supporting the body part, wherein the support part 330 includes a first support part 330a extending to the first side of the body part and a second support part 330b extending to the second side of the body part. It includes.

In addition, the top jaw 350 is the body portion 351 constituting the body, the gripping portion 352 for gripping the object to be processed or the gripping object to be processed and the fastening hole 353 for fastening with the T-nuts to be described later It includes.

In addition, the T-nut 340 is a body portion 342 constituting the body, protrusions (341a, 341b, 341) for fastening with the fastening portion of the base jaw and a fastening groove for fastening with the fastening hole of the top jaw (343).

That is, the protrusion of the T-nut is inserted into and supported by the fastening portion of the base jaw, and the fastening hole of the top jaw and the fastening groove of the T-nut are fastened by a screw or bolt 360, thereby providing the T-nut. Can engage the top and base jaws.

Meanwhile, the above-described base jaw and top jaw show an example. In the present invention, the base jaw and the top jaw may be an integrated structure, and the base jaw and the top jaw may be fastened to each other through the T-nut. In addition, it can be simply fastened without having a T-nut, and thus does not limit the configuration of the base jaw and the top jaw in the present invention.

Figure 3 is a schematic diagram showing a workpiece mounting chuck according to a third embodiment of the present invention, Figures 4a and 4b is a conceptual diagram for explaining the workpiece mounting chuck according to a third embodiment of the present invention.

The workpiece mounting chuck according to the third embodiment of the present invention may be the same as the above-described first and second embodiments except for the following. 4A and 4B show only a part of the workpiece mounting chuck for convenience of description.

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

The third reinforcement part 230 is a side third reinforcement part 230a positioned along the front surface of the side outer circumferential surface of the chuck body and an upper surface third reinforcement part 230b positioned along the front surface of the outer surface of the upper surface of the chuck body. It may include.

At this time, the outer circumferential surface of the chuck body may be defined as a surface located on the side of the surface of the chuck body exposed to the outside, the surface of the direction in which the screw fastening groove 213 will be described later is the upper surface of the chuck body The outer circumferential surface can be defined as described above.

Since this is the same as the second embodiment of the present invention, the following detailed description 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 an inner circumferential surface of the chuck body.

As described above, the outer circumferential surface of the chuck body may be defined as a surface in which the chuck body is exposed to the outside. In comparison, an area in which the guide part or the sliding part is located or a region in which the wedge plunger described later is disposed It can be defined as the inner circumference of the chuck body.

In this case, referring to FIG. 4A, the fourth reinforcement part 240 may include a guide part (or sliding part) fourth reinforcement part 240a positioned in the guide part (or sliding part) area. 4B, the wedge plunger fourth reinforcing part 240b positioned in the wedge plunger area may include the third reinforcing part 230 and the fourth reinforcing part 240. For the reinforcement of the general chuck material may be made of stainless steel, mechanical structural alloy steel or mechanical structural carbon steel material, which is as described above, and thus detailed description thereof will be omitted.

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

FIG. 5 illustrates a work mounting chuck according to a fourth embodiment of the present invention and shows a cross section taken along line I-I of FIG. 1A. The workpiece mounting chuck according to the fourth embodiment of the present invention shows only screw fastening grooves that can be located in a predetermined region of the chuck body for convenience of description, and the overall shape is for the workpiece mounting of the first embodiment described above. See Chuck.

At this time, Figure 5a is a schematic cross-sectional view showing a screw fastening groove according to an embodiment of the present invention, Figure 5b is a schematic cross-sectional view showing a screw fastening groove according to another embodiment of the present invention, Figure 5c Schematic cross-sectional view showing a screw fastening groove according to another example.

First, as shown in Figure 1a, etc., the chuck body of the workpiece mounting chuck may include a screw fastening groove 213 located in a certain area of the upper surface.

At this time, in general, the screw may include a head part and a screw part, and thus, the screw fastening groove 213 of the present invention may also include a screw head part fastening groove 213a and a screw screw part fastening groove 213b. .

As described above, the chuck body may be made of at least one material selected from the group consisting of aluminum alloys, titanium alloys, magnesium alloys, and carbon composite fibers, which may be easily worn due to weak strength or rigidity.

For this reason, by the screw fastened to the screw fastening groove 213, the screw fastening groove 213 can be easily worn, thereby causing a problem that the fastening state of the screw is loose.

Therefore, in the present invention, by including the fifth reinforcing

portion

240, 250, 260 in a predetermined region of the screw fastening groove 213, it is possible to prevent the screw fastening groove 213 is worn.

On the other hand, as shown in Figure 5a, an example 240 of the fifth reinforcing portion may be located throughout the screw head portion fastening groove 213a and the screw screw portion fastening groove 213b, and also, Figure 5b As shown in FIG. 5, another example 250 of the fifth reinforcement part may be located only in an area of the screw head fastening groove 213a, and as shown in FIG. 5C, another example of the fifth reinforcement part ( 260 is positioned throughout the screw head fastening groove 213a and the screw screw fastening groove 213b, considering the step difference between the screw head fastening groove 213a and the screw screw fastening groove 213b. Thus, it can be formed to a certain thickness.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

Claims

Chuck body; And

A base jaw installed on the chuck body,

The chuck body is at least one material selected from the group consisting of aluminum alloy, titanium alloy, magnesium alloy and carbon composite fiber,

And a first reinforcing part positioned along an outer circumferential surface of the chuck body.
The method of claim 1,

The first reinforcing part is a workpiece mounting chuck is located along a portion of the outer peripheral surface side of the chuck body.
The method of claim 1,

And the first reinforcement part including a side first reinforcement part positioned along a front surface of a side outer circumferential surface of the chuck body and an upper surface first reinforcement part located along a front surface of an upper peripheral surface of the chuck body.
The method of claim 3, wherein

And a second reinforcing part positioned along an inner circumferential surface of the chuck body.
The method of claim 4, wherein

And the second reinforcing part includes a guide part second reinforcing part located in the guide part area and a wedge plunger second reinforcing part located in the wedge plunger area.
The method of claim 1,

The chuck body includes a screw fastening groove located in a predetermined area on the upper surface,

And a third reinforcing part in a predetermined region of the screw fastening groove.
The method according to any one of claims 1 to 6,

The reinforcing part is a workpiece mounting chuck, characterized in that the stainless steel, mechanical structural alloy steel or mechanical structural carbon steel material.