KR20030072499A - A clamping assembly for tools - Google Patents

Abstract

PURPOSE: A coupling device for a cutting tool is provided to strongly couple an insert unit with a shank unit by using a connection unit for connecting the insert unit to the shank unit. CONSTITUTION: A coupling device for a cutting tool is composed of an insert unit(110), a shank unit(150) mounted with an arbor, and a connection unit(130) for connecting the insert unit to the shank unit. The insert unit includes a cutting insert(112) placed on a placing groove, a first coupling hole having a female screw(120), and a wrench guide hole(118) for piercing the first coupling hole. The connection unit includes a first coupling bar having a male screw(136), and a second coupling bar integrated with the first coupling bar and having a pin support plate(140). The shank unit includes a second coupling hole, a pin guide hole(154) for vertically piercing the second coupling hole, and a connecting pin(156) for fixing the second coupling bar.

Description

Joining device for cutting tools {A clamping assembly for tools}

The present invention relates to a coupling device for a cutting tool, and more particularly, a cut and a shank portion each having a first coupling hole and a second coupling hole communicating with each other, one end is screwed to the first coupling hole and the other end is first 2 The coupling hole is provided with a connection portion inserted and fixed by a pin. The cutting and shank parts can be tightened strongly, and the present invention relates to a cutting tool joining device capable of repeatedly fastening the pickling and shank parts.

Generally, a cutting tool is a tool used for processing steel or nonferrous workpieces into a shape desired by an operator. These cutting tools can be divided into milling tools and turning tools depending on the shape. In addition, various shapes of tools are used for optimum cutting performance according to processing purpose, processing range, workpiece shape, or workpiece material.

The above-described cutting tool can be roughly divided into an insert portion which actually performs cutting and a shank portion which is inserted and fixed to an arbor for a machine tool. The cutting tool thus formed has a limitation in the application area of the cutting tool because the cutting and shank portions are integrated. For this reason, conventionally, in order to change the cutting shape or change the length and material of the shank part, it is necessary to purchase an additional cutting tool or to make a customized manufacturing in order to apply the optimum cutting tool that the user wants. There was a problem.

In order to solve the above-mentioned problems of the prior art, a modular clamping system has been developed and used that separates the cutting tool and the shank part of the cutting tool, and allows the cutting tool of the required shape to be combined with the shank part. . Such a modular clamping system has the advantage of being able to apply pickled portions of various shapes to one shank portion and to arbitrarily adjust the length of the shank portion. However, when the combined fastening is weak due to the combined use of the separated pickled portion and the shank portion, there is a problem that the cutting ability may be reduced due to vibration during use. Therefore, in a cutting tool using a modular clamping system, a fastening device for joining the pickled portion and the shank portion plays an important role. Therefore, high precision, strong fastening and high reliability according to this technique must be secured.

In order to solve the above problems, various methods have been provided. However, the structure of the pickling and shank portions which are coupled to each other is complicated, and there is a problem in economic value.

The present invention has been made to solve the above problems, an object of the present invention is a cut and shank portion formed with a first coupling hole and a second coupling hole communicating with each other, one end is screwed to the first coupling hole And the other end having a connection portion inserted into the second coupling hole and fixed by the pin. The pickling and shank parts can be tightened strongly to provide high reliability to the consumer, as well as to provide a joining device for a cutting tool that can repeatedly tighten the pickling and shank parts.

1a and 1b is an exploded view showing a coupling tool for cutting tools according to a first embodiment of the present invention,

Figure 2 is a cross-sectional view of the coupling state of the coupling device for cutting tools shown in FIG.

3a and 3b is an exploded view showing a coupling tool for cutting tools according to a second embodiment of the present invention, and

4 is a cross-sectional view of the coupling state of the coupling device for cutting tools shown in FIG.

Explanation of symbols on the main parts of the drawing

100, 200: coupling device for cutting tools 110, 210: pickled portion

112, 212: cutting inserts 114, 214: settling grooves

116, 216: the first coupling hole 118: wrench guide hole

120, 256: Female thread 122: Key groove

130, 230: connecting portion 132, 232: first coupling table

134, 234: 2nd coupling rod 136, 236: external thread

138, 238: wrench insertion groove 142, 242: pin seating groove

150, 250: shank portion 152, 252: second coupling hole

154, 218: pin guide 156, 224: connecting pin

158: key projection 220: anti-rotation pin

222: first anti-rotation pin ball 258: second anti-rotation pin ball

In order to achieve the object of the present invention as described above, the present invention,

A settling groove is formed on the upper surface so that the cutting insert is settled on the upper surface, the first coupling hole having a female thread formed on the inner circumferential surface and the inner circumferential surface penetrating from the end of the first coupling hole to the other end. Pickled portion formed to guide wrench;

A male screw corresponding to the female thread is formed on the circumferential surface, and a first coupling stage having a wrench insertion groove formed on one end thereof, and integrally formed in the first coupling stage and concave along the pin support plate and the circumferential surface at positions adjacent to the end and the end. A connecting portion having a second coupler formed with a pin seating groove; And

The second coupling hole extending inwardly so that the second coupling member can be fitted at one end thereof, and the pin guide hole and the pin guide hole vertically passing through the second coupling hole so as to communicate with both sides of the inner circumferential surface of the second coupling hole. Provided is a coupling device for a cutting tool comprising a shank portion having a connecting pin inserted between a pin seating groove fitted into a ball to pivotally secure a second coupling table.

As described above, according to the present invention, the cut and shank portion formed with the first coupling hole and the second coupling hole communicating with each other, one end is screwed into the first coupling hole and the other end is inserted into the second coupling hole By having a connection secured by a pin. The pickled portion and the shank portion can be tightened strongly to obtain high reliability to the consumer, as well as to repeat the pickled portion and the shank portion repeatedly.

Hereinafter, a coupling device for a cutting tool according to a preferred embodiment of the present invention with reference to the accompanying drawings.

Figure 1a and 1b is an exploded view showing a cutting tool coupling device according to a first embodiment of the present invention, and Figure 2 is a cross-sectional view of the coupling state of the coupling device for a cutting tool shown in FIG.

1A to 2, the coupling device 100 for a cutting tool according to the first embodiment of the present invention includes a connection part 130 fastened to an inserting part 110 and a cutting part 110 to perform cutting. And a shank portion 150 mounted to the arbor of the machine tool while being connected to the pickled portion 110 by the connecting portion 130.

First, the pickled portion 110 is formed with a settling groove 114 in which the cutting insert 112 is placed on the upper surface thereof, and a first coupling hole 116 and a wrench guide hole 118 are formed therein. The first coupling hole 116 extends with a predetermined inclination from the center of the other end of the pickled portion 110 to the inner lower side of the pickled portion 110. At this time, the female screw 120 is formed on the inner circumferential surface of the first coupling hole 116. Similarly, the wrench guide hole 118 has a predetermined inclination so as not to interfere with the settling groove 114 in which the cutting insert 112 is placed from the end of the first coupling hole 116 to one end of the cutout 110. Extends through. On the other hand, the other end of the pickled portion 110 is formed with a key groove (122) extending from the top to the bottom. The connection portion 130 is mounted to the pickled portion 110 formed as described above.

The connecting portion 130 includes a cylindrical first coupling table 132 and a second coupling table 134 integrally formed with the first coupling table 132. The first coupling table 132 is formed with a circumferential male thread 136 to be coupled to the first coupling hole 116 of the pickled portion (110). The male screw 136 is engaged with the female screw 120 formed on the inner circumferential surface of the first coupling hole 116 is fastened. The second coupler 134 is formed with a pin support plate 140 and a pin seating groove 142 at the end and adjacent positions. The pin support plate 140 is formed to have a predetermined thickness from the end of the second coupler 134 to the inside of the second coupler 134. One side of the pin support plate 140 is formed with a pin seating groove 142 concave inwardly along the circumferential surface of the second coupler 134. Wrench insertion grooves 138 are formed at both ends of the connection portion 130 formed as described above.

Meanwhile, the shank part 150 forms a second coupling hole 152 and a plurality of pin guide holes 154 into which the second coupling unit 134 of the connection unit 130 is fitted. The second coupling hole 152 extends inwardly with a predetermined inclination upward from the center of one end of the shank portion 150. The pin guide hole 154 communicates with both sides of the inner circumferential surface of the second coupling hole 152 and penetrates from the upper portion of the shank portion 150 to the lower portion. At this time, the pin guide hole 154 is drilled perpendicular to the second coupling hole 152. Connection pins 156 are inserted into the pin guide holes 154, respectively. On the other hand, at one end of the shank portion 150, key projections 158 corresponding to the key grooves 122 formed in the pickled portion 110 are formed in the upper and lower portions, respectively.

Hereinafter, the coupling state of the coupling device 100 for a cutting tool according to the first embodiment of the present invention formed as described above will be briefly described.

First, the second coupling table 134 of the connecting portion 130 is inserted into the second coupling hole 152 of the shank portion 150. At this time, the first coupling table 132 on which the male screw 136 is formed is exposed to the outside of the shank portion 150. When the connection portion 130 is inserted into the second coupling hole 152, the connection pin 156 is inserted into the pin guide hole 154 formed in the shank portion 150. At this time, the connecting pin 156 inserted from the top into the pin guide hole 154 is inserted to the bottom through the pin seating groove 142 coupled to the second coupling hole 152. As such, when the second coupling table 152 is coupled to the shank portion 150, the picking portion 110 is coupled to the first coupling table 132.

In order to couple the pickled portion 110 to the first coupler 132, a predetermined wrench (not shown) is inserted into the wrench guide hole 118 formed at one end of the pickled portion 110, and the other end of the pickled portion 110 is provided. The end of the wrench is inserted into the wrench insertion groove 138 formed in the first coupler 132 under the state of being penetrated to the side. When the wrench is inserted into the range insertion groove 138, the wrench rotates under the state in which the key groove 122 of the pickled portion 110 and the key protrusion 158 of the shank portion 150 are disposed close to each other. ) Will rotate. At this time, the male screw 136 formed in the connecting portion 130 is fastened to the female screw 120 formed in the first coupling hole 116 while rotating. At this time, the connecting portion 130 is freely rotated by the combination of the pin mounting groove 142 and the connecting pin 156, the pin support plate 140 supports the fastening force in the axial direction when the female screw 120 and the male screw 136 is fastened. To strongly combine the pickled portion 110 and the shank portion 150. The connection portion 130 coupled as described above remains connected to the shank portion 150 until the connecting pin 156 is disassembled from the shank portion 150 to prevent the connection portion 130 from being lost. can do. In addition, although a plurality of pin guide holes 154 and connecting pins 156 are shown in the present invention, various changes may be made according to the spatial margin of the shank portion 150.

Figure 3a and 3b is an exploded view showing a cutting tool coupling device according to a second embodiment of the present invention, and Figure 4 is a cross-sectional view of the coupling state of the coupling device for the cutting tool shown in FIG.

3A to 4, the joining device 200 for a cutting tool according to the second embodiment of the present invention includes a picking unit 210 and a picking unit 210 that perform cutting similarly to the first embodiment. It is provided with a shank portion (250) mounted to the arbor of the machine tool while being connected to the pickled portion (210) by the connection portion 230 and the connection portion 230 is fastened to.

First, the pickled portion 210 is formed with a settling groove 214 on which the cutting insert 212 is placed on the upper surface, and forms a first coupling hole 216 and a plurality of pin guide holes 218 therein. do. The first coupling hole 216 extends horizontally from the center of one end of the pickled portion 210 to the inside of the pickled portion 210, and extends to the other end of the cut portion 210 at the end of the first coupling hole 216. The first wrench guide hole 217 is formed. On the radial side of the first coupling hole 216, a first rotation preventing pin hole 222 to which one end of the rotation preventing pin 220 is fitted is formed. On the other hand, the pin guide hole 218 is formed by vertically through the lower side from the top of the pickled portion 210 to communicate with both sides of the inner peripheral surface of the first coupling hole 216. At this time, the pin guide hole 218 is perforated perpendicular to the first coupling hole 216. Connection pins 224 are inserted into the pin guide holes 218, respectively.

The connection portion 230 includes a cylindrical first coupling stand 232 and a second coupling stand 234 integrally formed with the first coupling stand 232. The first coupler 232 is formed with a pin support plate 240 and the pin seating groove 242 at the end and adjacent positions. The pin support plate 240 is formed to have a predetermined thickness from the end of the first coupler 232 to the inside of the second coupler 234, the pin seating groove 242 is formed on one side of the pin support plate 240 1 is formed concave inward along the circumferential surface of the coupling table 232. The second coupler 234 has a male screw 236 formed on a circumferential surface thereof. Wrench insertion grooves 238 are formed at both ends of the connection portion 230 formed as described above.

Meanwhile, the shank unit 250 includes a second coupling hole 252 and a second wrench guide hole 254 into which the second coupling table 234 of the connection unit 230 is fitted. Like the first coupling hole 216, the second coupling hole 252 extends inwardly of the shank portion 250 horizontally from the center of one end of the shank portion 250. At this time, the female screw 256 is formed on the inner circumferential surface of the second coupling hole 252. The second anti-rotation pin hole 258 corresponding to the first anti-rotation pin hole 222 is formed on one radial side of the second coupling hole 252, and the first anti-rotation pin hole 258 is formed on the second anti-rotation pin hole 258. The other end of the anti-rotation pin 220 is fitted to the 222 is fitted. Meanwhile, the second range guide hole 254 extends horizontally from the end of the second coupling hole 252 to the other end of the shank portion 250.

Hereinafter, the coupling state of the coupling device for cutting tool 200 according to the second embodiment of the present invention formed as described above will be briefly described.

First, the first coupling table 232 of the connecting portion 230 is inserted into the first coupling hole 216 of the pickled portion 210. At this time, the second coupler 234 in which the male screw 236 is formed is exposed to the outside of the pickled portion 210. When the connection portion 230 is inserted into the first coupling hole 216, the connection pin 224 is inserted into the pin guide hole 218 formed in the pickled portion 210. At this time, the connecting pin 224 inserted from the upper portion of the pin guide hole 218 is inserted through the pin seating groove 242 coupled to the interior of the first coupling hole 216 to the lower portion of the pickled portion 210. . As described above, when the first coupling table 232 is coupled to the pickled portion 210, the shank portion 250 is coupled to the second coupling table 234.

In order to couple the shank portion 250 to the second coupler 234, a second wrench guide hole 254 and a first wrench guide hole formed at the other end of the shank portion 250 and the pickled portion 210 may be provided. The end of the wrench is inserted into the wrench insertion groove 238 formed in the second coupler 234 under the state of being inserted into any one of 217 to be penetrated to one end side of the shank portion 250. When the wrench is inserted into the range of the insertion hole 238, the other end of the anti-rotation pin 220 coupled to the second anti-rotation pin hole 222 formed on the shank portion 250 is connected to the first anti-rotation pin hole 222. When the wrench is rotated under the close arrangement, the connection portion 230 rotates by the wrench. At this time, the male screw 236 formed in the connecting portion 230 is fastened to the female screw 256 formed in the second coupling hole 252 while rotating. At this time, the connecting portion 230 is freely rotated by the combination of the pin guide groove 242 and the connecting pin 224, the pin support plate 240 is a fastening force in the axial direction when the female screw 256 and the male screw 236 is fastened. By supporting the shank portion 250 and the pickled portion 210 is strongly coupled.

As described above, the coupling device (100, 200) for cutting tools according to the first and second embodiments of the present invention is connected to any one of the pickled portion (110, 210) or shank portion (150, 250) (130, 230) is fixedly rotatably coupled to one end, the other end of the connecting portion (130, 230) formed with a male screw (136, 236), the pickled portion (110, 210) formed with wrench guide holes (118, 254) again Alternatively, by screwing the shank parts 150 and 250, not only the fastening force drops sharply due to the wear phenomenon of the connection parts of the pickled parts 110 and 210 and the shank parts 150 and 250, but also the picked parts 110. , 210) and the shank portion (150, 250) has the advantage that can be repeated repeatedly.

In addition, the key groove 122, the key projection 158 and the first anti-rotation pin hole 222, the second anti-rotation in the pickling portion (110, 210) and the shank portion (150, 250), respectively By providing the pin hole 258 and the anti-rotation pin 220, there is an advantage that can perform the role of rotation prevention at the time of centering and cutting.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims You will understand.

Claims (5)

A first coupling hole 116 having a female groove 120 formed on an inner circumferential surface thereof with an inner groove 114 formed therein with a cutting insert 112 settled on an upper surface thereof so as to perform cutting. And a pickled portion 210 formed with a wrench guide hole 118 penetrating from one end of the first coupling hole 116 to one end side; Wrench insertion grooves 138 formed at both ends, a first coupling table 132 formed with a male screw 136 corresponding to the female screw 120 on the circumferential surface, and integrally with the first coupling table 132. A connection portion 130 having a second supporter 134 formed at the end and adjacent to the pin support plate 140 and the pin seating groove 142 concave along the circumferential surface; And At one end, the second coupling hole 152 extending inwardly to allow the second coupling stand 134 to be fitted therein, and the second coupling hole to communicate with both sides of the inner circumferential surface of the second coupling hole 152. 152 is inserted between the pin guide hole 154 and the pin seating groove 142 fitted in the pin guide hole 154 and the second coupling hole 152 perpendicular to the second coupling table ( Joining device for a cutting tool, characterized in that consisting of a shank portion 150 having a connecting pin 156 to pivotally secure the 134. The method of claim 1, wherein the first coupling hole 116 and the wrench guide hole 118 is formed with a predetermined inclination so as not to interfere with the settling groove 114, the second coupling hole 152 Joining device for a cutting tool, characterized in that extending when having a slope corresponding to the first coupling hole (116). According to claim 1, The other end of the pickling portion 110 is formed with a key groove 122 extending from the top to the bottom, The key groove 122 formed in the pickling portion 110 at one end of the shank portion (150) Key projections (158) corresponding to the cutting tool coupling device, characterized in that formed in the radially upper and lower, respectively. A settling groove 214 in which the cutting insert 212 is placed is formed on the upper surface so as to perform cutting, and at the other end thereof, a first coupling hole 216 extending inwardly in the center and the first coupling hole. A first wrench guide hole 217 penetrating from one end of the end portion 216 to a first side, and a pin vertically passing through the first coupling hole 216 to communicate with both sides of the inner circumferential surface of the first coupling hole 216. Pickled portion 210 having a guide hole 218 and a connecting pin 224 fitted to the pin guide hole 218; Wrench insertion grooves 238 formed at both ends, and the connecting pin 224 together with the pin support plate 240 and the pin guide hole 218 in the position adjacent to the end and the end while being fitted in the first coupling hole 216 The first coupling table 232 is formed in the concave pin mounting groove 242 concave along the circumferential surface so as to be inserted into the first coupling table 232 integrally formed on the circumferential surface of the male screw 236 A connecting portion 230 having a second coupling band 234 formed thereon; And A second coupling hole 252 having a female thread 256 corresponding to the male screw 236 on an inner circumferential surface thereof while extending horizontally inwardly so that the second coupling table 234 may be fitted at one end thereof; Joining device for a cutting tool, characterized in that consisting of the shank portion 250 having a second wrench guide hole 254 penetrating from the end of the ball (252) to the other end side. The radially side of the first coupling hole 216 is formed with a first anti-rotation pin hole 222 into which one end of the anti-rotation pin 220 is inserted and the radial of the second coupling hole 256. The coupling device for a cutting tool, characterized in that formed on the side corresponding to the first anti-rotation pin hole 222, the second anti-rotation pin hole 258 is fitted to the other end of the anti-rotation pin 220.