KR102263070B1 - Quick Work Holder Clamp Device - Google Patents

Abstract

The quick workholder clamp device of the present invention is simple in configuration and smooth and reliable in operation, so that the workholder can be replaced quickly and stable clamping is achieved when the workholder is combined, thereby maximizing the convenience of use and the precision of processing. As a result of this, basically a dovetail groove or bolt fastening flange or jig 300 that can hold and give a workpiece is selectively installed on the upper part, and the lower part has a cylindrical coupling part 110 with an open lower side. holder 100, and
The lower coupling part 110 of the work holder 100 is coupled so that the insertion space 210 is formed into the holder base 200 mounted on the table of the machining center, and the coupling part 110 is inserted into the insertion space 210 In configuring a clamping device including a clamp unit 300 for selectively clamping the work holder 100,
A dovetail projection 221 is formed on the upper surface of the clamp core 220 that is coupled and installed so that the insertion space 211 of the lower coupling part 110 of the work holder 100 is formed into the holder base 210,
A plurality of block pieces 231 and 232 are installed on the dovetail protrusion 221 so that the block pieces 232 having the contact surfaces 232a formed on the outer periphery of the lower edge are positioned at both ends,
The plurality of block pieces 231 and 232 are clamped screws 230 with bidirectional threads so that the dovetail grooves 231b and 232b formed on the bottom surface of the plurality of block pieces 231 and 232 are fitted into the dovetail protrusion 221 . By configuring the clamp unit 200 by screwing to the
After inserting the lower coupling part 110 of the workholder 100 into the insertion space 211,
By rotating the clamp screw 230 to spread the block pieces 231 and 232 along the dovetail protrusion 221 to the left and right sides, the work holder is formed on the outer edge of the lower edge of the block piece 232 at both ends. It is characterized in that the workholder 100 is firmly clamped by pressing the tapered surface 111 formed on the coupling portion 110 of (100).

Description

Quick Work Holder Clamp Device

The present invention relates to a quick workholder clamping device, and more particularly, its configuration is simple, and its operation is smooth and reliable, so it is easy to combine and separate the workholder to which the workpiece is fixed. As a result, the workholder can be replaced quickly. It relates to a quick work holder clamping device that increases the convenience of use and provides stable clamping when the work holder is combined to increase processing precision.

[Project unique number] D2020106
[Buddha] Gyeonggi-do
[Research management institution] Gyeonggi-do Economic Science Promotion Agency
[Research project name] Gyeonggi-do technology development project/company-led (general)
[Research project name] Localization of 5-axis clamp capable of multi-positioning and centering function and development of import substitution
[Contribution rate] 1/1
[Organizer] Blue NC
[Research period] 2020.02.01. ~ 2021.02.28.
In general, a machining center is a multi-function CNC machine lathe, and refers to a complex machine tool that can be automatically performed according to the G-code program that inputs machining such as boring, taping, and reaming as well as milling or drilling.

Currently, in 3-axis machining centers or 5-axis machining centers, in order to facilitate the multi-sided machining of a workpiece chucked in a work holder that is divided into a dovetail clamp holder having a dovetail groove or a bolted flange lamp holder,

A clamping device is provided for selectively clamping the work holder to which the workpiece is chucked.

As an example, a clamp device is disclosed in Japanese Patent Laid-Open No. 2009-115166.

However, since the clamp device disclosed as described above is configured to fasten the tapered surface formed on the outer surface of the lower fastening part of the workholder and the steel ball in a point contact state, the fastening state is not stable and there is a risk that the workholder may rattle. , there is a problem in that the processing of the workpiece is not accurate due to this rattling.

As other prior art, there are Japanese Patent Publication No. 2003-300124 No., Domestic Utility Model Registration No. 20-0274404 No. and the like.

The present invention has been devised in consideration of the various problems of the prior art,

Its configuration is simple, but the operation is smooth and reliable, so the workholder can be replaced quickly.

By providing a high-quality clamping device that is configured to achieve stable clamping when a work holder is combined,

The purpose is to maximize the convenience of use and the precision of processing.

The quick workholder clamp device of the present invention for achieving the object described in the above problem is basically a dovetail groove or a bolt fastening flange or a jig that can hold a work piece at the upper part is selectively installed and the lower side is open at the lower part A work holder with a cylindrical coupling portion formed therein;

In constructing a clamping device including a clamp unit for selectively clamping the workholder in which the engaging portion is inserted into the insertion space by being coupled to form a lower engaging portion insertion space of the workholder into the holder base mounted on the table of the machining center. ,

A dovetail projection is formed on the upper surface of the clamp core that is coupled and installed so as to form an insertion space into which the lower coupling part of the work holder is inserted into the holder base constituting the clamp unit,

A plurality of block pieces are installed to face each other so that the block pieces having a close contact surface on the outer edge of the lower edge of the dovetail protrusion are located at both ends,

By screwing the plurality of block pieces to a clamp screw having bidirectional threads so that the dovetail groove formed on the bottom surface of the plurality of block pieces is fitted into the dovetail projection,

After inserting the lower coupling part of the workholder into the insertion space,

By rotating the clamp screw to spread the block pieces to the left and right along the dovetail protrusion, the workholder is firmly clamped by pressing the tapered surface formed in the coupling part of the workholder with the close contact surface formed on the outer edge of the lower edge of the block piece at both ends. is characterized by

The quick work holder clamp device of the present invention is simple in its configuration, but the center fixing plate is coupled to the center fixing groove formed on the upper part of the work holder, and the middle part of the jig screw having a bidirectional thread on the center fixing plate is rotatably coupled,

Since a jig made by screwing a pair of jig blocks is installed on both sides of a jig screw having a two-way thread, first rotate the jig screw and spread or retract a pair of jig blocks to the left and right sides centering on the center fixing plate to open or close the work piece. It has the advantage that it can be gripped very easily and quickly.

In addition, when the clamp screw is rotated in one direction (the direction in which the block pieces are spread to the left and right sides), in the present invention, a plurality of block pieces are installed on the dovetail protrusion formed on the upper surface of the clamp core constituting the clamp unit. A dovetail groove is formed on the bottom surface of each block piece, and the dovetail groove is coupled to the dovetail projection. As a result, a plurality of block pieces are installed on the upper surface of the clamp core.

At the same time, since all of the plurality of block pieces are screwed to a clamp screw having a bidirectional thread,

After inserting the lower coupling part of the work holder into the insertion space, rotate the clamp screw to spread the block pieces to the left and right along the dovetail protrusion. As the block pieces at both ends are guided horizontally by the dovetail protrusion, the close contact formed on the outer edge of the lower corner The surface contact is very simple and quick due to the strong force on the tapered surface, and there is no rattling of the work holder due to the very solid bonding state, so that precise machining of the workpiece is achieved.

In addition, in the present invention, since the outer surface of the block piece at both ends is formed as a convex surface to match the concave surface of the upper tapered surface formed in the coupling part of the work holder, the close contact surface formed on the outer edge of the lower edge of the block piece at both ends is the work At the same time as pressing the tapered surface formed on the coupling part of the holder,

Since the convex surface is pressed while closely adhering to the concave surface of the workholder, the workholder is clamped more firmly in double, so that precise machining of the workpiece is more and more perfect.

In addition, when separating the workholder firmly coupled to the clamp device of the present invention, if the clamp screw is reversely rotated (in the direction of retracting the block pieces inward), the block pieces that were spread out on the left and right sides are guided horizontally by the dovetail protrusion. The workholder is very easy to separate because the pressure of the tapered surface formed in the joint of the workholder that was pressed with a strong force by the close contact surface formed on the outer edge of the lower edge of the block piece at both ends as it shrinks inward is released and the clamping is released. However, it has the advantage of being done quickly.

As a result, the present invention has a very simple configuration and smooth operation, so it is easy to fix the workpiece and to combine and separate the work holder. As a result, the work holder can be quickly replaced, which increases the convenience of use, and the combination of the work holder is easy. It is clear that it is an innovative invention that can be used very usefully in actual use because it increases the processing precision through stable clamping.

1 to 4 are views showing an embodiment of the present invention,
1 is an entire exploded perspective view.
Figure 2 is a perspective view of the entire assembly state.
Figure 3 is a perspective view showing a state in which the work holder is separated.
Figure 4 is a bottom perspective view showing a state in which the work holder is separated.
5 to 7 are views showing the use state of the present invention,
5 is an exemplary front cross-sectional view showing a state before assembling the work holder.
Figure 6 is a front cross-sectional view showing a state in which the clamping of the work holder is completed.
7 is a front cross-sectional view illustrating a state in which the clamp core is separated into an upper body and a lower fixed plate and fastened with bolts as another embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings 1 to 7 . It should be understood that the embodiments described below are illustratively shown to aid understanding of the present invention, and that the present invention may be implemented with various modifications different from the embodiments described herein. However, in the description of the present invention, if it is determined that a detailed description of a related known function or component may unnecessarily obscure the gist of the present invention, the detailed description and detailed illustration thereof will be omitted. For example, the work holder can be composed of a dovetail clamp holder having various types of dovetail grooves, a bolt fastening flange clamp holder, and a jig clamp holder, so detailed descriptions of these parts can be omitted in the work holder described below. In addition, the accompanying drawings are not drawn to scale in order to help understanding of the invention, but dimensions of some components may be exaggerated.

The present invention is a workholder 100, in which a dovetail groove or bolt fastening flange or jig 300 that can hold a workpiece is selectively installed on the upper part, and a cylindrical coupling part 110 with an open lower side is formed in the lower part;

A clamping device including a clamp unit 200 mounted on a table of a machining center and selectively clamping the work holder 100 having a cylindrical coupling part 110 having an open lower side of the work holder 100 at the lower part. Regarding to

A work holder 100 having a dovetail groove or bolt fastening flange or a jig 300 that can hold a work piece at the upper portion and selectively installed with a cylindrical coupling portion 110 with an open lower side at the lower portion 100,

And the holder base 210 and the holder base 210 are coupled to the inside of the clamp core 220 and clamp installed so that the insertion space 211 into which the lower coupling part 110 of the work holder 100 is inserted is formed. Clamping unit 200 consisting of block pieces 231 and 232 installed on the core 220 and clamping the workholder 100 while being opened and closed on both left and right sides by the clamp screw 230 having a bidirectional thread formed therein. is separated into

Here, a dovetail projection 221 is formed on the upper surface of the clamp core 220 constituting the clamp unit 200, and a plurality of block pieces 231 and 232 are installed to face each other on the dovetail projection 221. I have this installed

Dovetail grooves 231b and 232b are respectively formed on the bottom surfaces of the plurality of block pieces 231 and 232, and these dovetail grooves 231b and 232b are coupled to the dovetail projection 221, resulting in a clamp core. Of course, a plurality of block pieces 231 and 232 are coupled and installed on the upper surface of the 220,

At the same time, the plurality of block pieces 231 and 232 are all screwed to the clamp screw 230 having a bidirectional thread.

In addition, a contact surface 232a is formed on the outer edge of the lower edge of the block piece 232 at both ends of the plurality of block pieces 231 and 232 .

Therefore, after inserting the lower coupling part 110 of the workholder 100 into the insertion space 211 by this configuration,

When the block pieces 231 and 232 are spread to the left and right sides along the dovetail projection 221 by rotating the clamp screw 230, the contact surface 232a formed on the outer edge of the lower edge of the block piece 232 at both ends is the work piece. The work holder 100 is firmly clamped by pressing the tapered surface 111 formed on the coupling portion 110 of the holder 100 .

Here, according to the present invention, the dovetail protrusion 221 formed on the upper portion of the clamp core 220 can be integrally formed, or the dovetail groove 231b formed on the bottom surface of the plurality of block pieces 231 and 232, respectively. ) (232b) can be formed in a detachable manner that is screwed with a bolt (not shown) to facilitate coupling to the dovetail protrusion 221. In this way, first, the plurality of block pieces 231 and 232 are formed on the bottom surface, respectively. When the dovetail grooves 231b and 232b are coupled to the dovetail projection 221 and the dovetail projection 221 is screwed onto the top surface of the clamp core 220 with a bolt (not shown), the top surface of the clamp core 220 is very simple. A plurality of block pieces 231 and 232 can be connected to each other.

In addition, the present invention is configured to separate the clamp core 220 into an upper body 220a and a lower fixing plate 220b as shown in FIG. 7 to be fastened with a bolt 220c,

The dovetail grooves 231b and 232b formed on the bottom surfaces of each of the block pieces 231 and 232 screwed using a clamp screw 230 having a bi-directional thread are formed in the upper body 220a of the clamp core 220. After inserting the upper body 220a of the clamp core 220 into the upper part of the holder base 210 in a state coupled to the dovetail projection 221 formed on the

The lower fixing plate 220b of the clamp core 220 through the lower part of the holder base 210 is bolted to the upper body 220a of the clamp core 220 to install the clamp core 220 to the holder base 210. may be

In addition, the present invention uses the clamp screw 230 having the bi-directional thread formed therein to connect the outer surfaces of the block pieces 232 at both ends of the plurality of block pieces 231 and 232 screwed together with the workholder 100. By forming a convex surface 232c to coincide with the concave surface 112 of the upper tapered surface 111 formed in the portion 110,

By rotating the clamp screw 230 to spread the block pieces 231 and 232 along the dovetail protrusion 221 to the left and right sides, the contact surface 232a formed on the outer edge of the lower edge of the block piece 232 at both ends is the workholder. At the same time as pressing the tapered surface 111 formed on the coupling portion 110 of the 100, the convex surface 232c is pressed while in close contact with the concave surface 112 of the workholder 100, the workholder 100 may be made to be more firmly clamped in double.

On the other hand, the present invention forms a jig coupling portion 120 having a center fixing groove 121 formed on the upper portion of the workholder 100, and a jig 300 capable of holding the workpiece in the jig coupling portion 120 . ) installed,

The center fixing plate 310 is coupled to the center fixing groove 121 formed on the upper part of the workholder 100, and the middle part of the jig screw 320 having a bidirectional thread formed on the center fixing plate 310 is rotatably coupled,

By screwing a pair of jig blocks 330 to both sides of the jig screw 320 having a bidirectional thread,

When the jig screw 320 is rotated, a pair of jig blocks 330 about the center fixing plate 310 may be configured to hold the work piece while opening or retracting to the left and right sides.

Hereinafter, the use state of the present invention quick workholder clamp device configured as described above will be described.

In order for the clamp device of the present invention to process a workpiece using a machining center mounted on a table top surface, in the case of the present invention, for example, a jig coupling part 120 having a center fixing groove 121 formed on the upper portion of the work holder 100 . ) is formed and a jig 300 that can hold and give a work piece is installed in this jig coupling part 120, so you can use this jig 300 to fix the work piece,

The jig 300 in the present invention combines the center fixing plate 310 to the center fixing groove 121 formed on the upper portion of the workholder 100, and a jig screw 320 in which a bidirectional thread is formed in the center fixing plate 310. After joining the middle part rotatably,

Since a pair of jig blocks 330 are screwed on both sides of the jig screw 320 having a bi-directional thread, first rotate the jig screw 320 to center the center fixing plate 310, and a pair of jig blocks ( 330) to the left and right sides, or to hold the work piece by closing it.

In this way, in a state in which the workpiece is chucked in the head portion of the work holder 100, the lower coupling portion 110 of the work holder 100 is inserted into the insertion space 211 formed in the upper portion of the clamp unit 200. .

After the work holder 100 is coupled to the correct position as described above,

When the clamp screw 230 is rotated in one direction (the direction in which the block pieces 231 and 232 are spread to the left and right sides), in the present invention, the dovetail protrusion formed on the upper surface of the clamp core 220 constituting the clamp unit 200 . A plurality of block pieces 231 and 232 are installed in 221,

Dovetail grooves 231b and 232b are respectively formed on the bottom surfaces of the plurality of block pieces 231 and 232, and these dovetail grooves 231b and 232b are coupled to the dovetail projection 221, resulting in a clamp core. Of course, a plurality of block pieces 231 and 232 are coupled and installed on the upper surface of the 220,

At the same time, since the plurality of block pieces 231 and 232 are all screwed to the clamp screw 230 having a bidirectional thread,

After inserting the lower coupling part 110 of the workholder 100 into the insertion space 211, rotate the clamp screw 230 to move the block pieces 231 and 232 along the dovetail protrusion 221 to the left and right sides. When it spreads, the close contact surface 232a formed on the outer edge of the lower edge of the block piece 232 at both ends presses the tapered surface 111 formed on the coupling part 110 of the workholder 100, so that the workholder 100 is solid. clamped tightly.

As described above, when the work holder 100 is clamped using the clamp unit 200 of the present invention, the block pieces 232 at both ends are horizontally guided by the dovetail protrusion 221 while the contact surface formed on the outer edge of the lower corner ( 232a) is made very simply and quickly to make surface contact with the tapered surface 111 with a strong force, and the bonding state is very solid, so that there is no rattling of the workholder 100 at all, so the precise processing of the workpiece is made.

In particular, in the present invention, the convex surface 232c so that the outer surface of the block piece 232 at both ends coincides with the concave surface 112 of the tapered surface 111 formed in the coupling portion 110 of the workholder 100. Because it was formed with

At the same time, the contact surface 232a formed on the outer edge of the lower edge of the block piece 232 at both ends presses the tapered surface 111 formed on the coupling part 110 of the workholder 100 and at the same time,

The convex surface 232c is pressed while closely adhering to the concave surface 112 of the workholder 100 so that the workholder 100 is double and more firmly clamped, so that the precise processing of the workpiece is made more and more perfectly.

This time, the process of separating the work holder 100 from the clamp unit 200 of the present invention after the processing of the workpiece is completed will be described.

When separating the workholder firmly coupled to the clamp device of the present invention,

First, the clamp screw 230 is rotated in the reverse direction (the block pieces 231 and 232 are retracted inward).

Then, the block pieces 231 and 232, which were spread apart from both sides, are horizontally guided by the dovetail projection 221 and retracted inward, so that the contact surfaces 232a formed on the outer periphery of the lower corners of the block pieces 232 at both ends are the above. As the pressure of the tapered surface 111 formed on the coupling portion 110 of the workholder 100 is released, the clamping is released.

As described above, although the present invention has been described with reference to limited embodiments and drawings, it is not limited by these embodiments, and the technical spirit of the present invention and described below by those of ordinary skill in the art to which the present invention pertains Of course, various modifications and variations are possible within the scope of equivalents of the claims to be made.

100: work holder 110: coupling part
111: tapered surface 112: concave surface
113: coupling groove 120: jig coupling part
121: center fixing groove 200: clamp unit
210: holder base 211: insertion space
220: clamp core 221: dovetail projection
230: clamp screw 231,232: block piece
231b, 232b: Dovetail groove 232a: Adhesive surface
232c: convex surface 300: jig
310: center fixing plate 320: jig screw
330: jig block

Claims (5)

A work holder 100 having a dovetail groove or a bolt fastening flange or a jig 300 selectively installed on the upper part, and a cylindrical coupling part 110 with an open lower side formed on the lower part,
The lower coupling part 110 of the work holder 100 is coupled so that the insertion space 210 is formed into the holder base 200 mounted on the table of the machining center, and the coupling part 110 is inserted into the insertion space 210 In configuring a clamping device including a clamp unit 300 for selectively clamping the work holder 100,
A dovetail projection 221 is formed on the upper surface of the clamp core 220 that is coupled and installed so that the insertion space 211 of the lower coupling part 110 of the work holder 100 is formed into the holder base 210,
A plurality of block pieces 231 and 232 are installed on the dovetail protrusion 221 so that the block pieces 232 having the contact surfaces 232a formed on the outer periphery of the lower edge are positioned at both ends,
The plurality of block pieces 231 and 232 are clamped screws 230 with bidirectional threads so that the dovetail grooves 231b and 232b formed on the bottom surface of the plurality of block pieces 231 and 232 are fitted into the dovetail protrusion 221 . By configuring the clamp unit 200 by screwing to the
After inserting the lower coupling part 110 of the workholder 100 into the insertion space 211,
By rotating the clamp screw 230 to spread the block pieces 231 and 232 along the dovetail protrusion 221 to the left and right sides, the work holder is formed on the outer edge of the lower edge of the block piece 232 at both ends. A quick workholder clamp device, characterized in that the workholder 100 is firmly clamped by pressing the tapered surface 111 formed on the coupling portion 110 of (100). According to claim 1,
The dovetail protrusion 221 formed on the upper part of the clamp core 220 is integrally formed or is a quick workholder clamp device characterized in that it is formed in a detachable manner that is screwed with a bolt. According to claim 1,
By separating the clamp core 220 into an upper body 220a and a lower fixing plate 220b and fastening them with bolts,
Dovetail grooves 231b and 232b formed on the bottom surface of each block piece 231 and 232 screwed together using a clamp screw 230 having a bi-directional thread are applied to the upper body 220a of the clamp core 220. After inserting the upper body 220a of the clamp core 220 into the upper part of the holder base 210 in a state coupled to the formed dovetail protrusion 221,
The lower fixing plate 220b of the clamp core 220 through the lower part of the holder base 210 is bolted to the upper body 220a of the clamp core 220 so that the clamp core 220 is installed on the holder base 210. A quick workholder clamp device characterized by a. According to claim 1,
The outer surfaces of the block pieces 232 at both ends of the plurality of block pieces 231 and 232 screwed using the clamp screw 230 having the bidirectional thread formed thereon are attached to the coupling portion 110 of the workholder 100. By forming a convex surface 232c to coincide with the concave surface 112 of the formed tapered surface 111,
By rotating the clamp screw 230 to spread the block pieces 231 and 232 along the dovetail protrusion 221 to the left and right sides, the contact surface 232a formed on the outer edge of the lower edge of the block piece 232 at both ends is the workholder. At the same time as pressing the tapered surface 111 formed on the coupling portion 110 of the 100, the convex surface 232c is pressed while in close contact with the concave surface 112 of the workholder 100, the workholder 100 A quick workholder clamp device, characterized in that it is made to be more firmly clamped. According to claim 1,
A jig coupling part 120 having a center fixing groove 121 formed on the upper portion of the work holder 100 is formed, and a jig 300 capable of gripping and giving a workpiece is installed in the jig coupling part 120,
The center fixing plate 310 is coupled to the center fixing groove 121 formed on the upper part of the workholder 100, and the middle part of the jig screw 320 having a bidirectional thread formed on the center fixing plate 310 is rotatably coupled,
By screwing a pair of jig blocks 330 to both sides of the jig screw 320 having a bidirectional thread,
A quick workholder clamp device characterized in that when the jig screw 320 is rotated, a pair of jig blocks 330 about the center fixing plate 310 are installed to grip the work piece while opening or retracting to both left and right sides.

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