KR101096345B1 - tool holder of grooving - Google Patents

Abstract

The present invention relates to a tool holder for grooving, wherein the clamp pocket 120 is formed on the upper side of the head 110, the female thread 122 is formed on the clamp pocket 120, and the binding female screw is formed on one side of the head 110. 136 is formed on one side of the holder 100, the head 110, and the slit 152 is formed on the upper side to form a binding hole 158 inside the slit 152 and to one side of the binding hole 158 The bolt sheet 167 is formed, and the recess 168 is formed at the lower side of the binding hole 158 below the surface of the bolt sheet 167 and accommodates the cutting insert 30 inside the slit 152. The lower jaw 162 and the upper jaw 163 are inserted into the blade 150, the binding hole 158 is fastened to the binding female screw 136 and abuts the bolt seat 167 and the gap with the recess 168 The clamping body 172 is accommodated in the binding bolt 166 and the clamp pocket 120 in which (t) is formed, and one side of the clamping body 172 A clamp 170 and a female thread 122 and a clamp female screw (174), in which a clamping rod 174 is formed to press the upper side 159 of the id 150 and a clamp female screw 176 is formed in the clamp body 172. 176) a double screw 180 is coupled to both ends.

Tool Holders, Grooving, Cutting, Blades, Cutting Inserts, Replacement

Description

Tool holder for grooving {tool holder of grooving}

The present invention relates to a tool holder for grooving, and more particularly, to fix the cutting insert to the blade (blade), to fix the above-mentioned blade to the tool holder, the cutting insert and the blade to be used in the tool holder can be replaced A grooving tool holder.

In general, a tool holder with a blade is used to cut a groove or to cut a workpiece, and a cutting insert is fixed to the blade.

The above-described blade is composed of an upper jaw and a lower jaw, the upper jaw is elastically deformed by the tightening force of the bolt to firmly fix the above-mentioned cutting insert.

In addition, the blade must be thin and long so that the cutting insert can enter the workpiece to a predetermined depth by performing the cutting operation, at which time the blade can be inserted into the cut groove.

However, the thinner the blade, the weaker the tool holder may cause a problem that the tool holder is damaged by the cutting stress applied to the tool holder.

On the other hand, if the blade holding the cutting insert becomes an integral part of the tool holder, the entire tool holder must be replaced when the tool holder is damaged and needs to be replaced, in which case the tool holder is relatively simple and a conventional quadrilateral Even shank tool holders are costly and inconvenient.

The conventional tool holder as described above will be described with reference to the accompanying drawings, FIGS. 1 and 2.

1 and 2 are exemplary views showing a perspective view, a front view and a side view for explaining a conventional tool holder for grooving.

As shown in FIG. 1, a thin blade 20 is formed in front of a conventional tool holder 10, and a slit in a direction perpendicular to the thickness of the blade 20 is formed above the blade 20. : 12) is formed and the neck part 14 is formed on the rear side of the slit 12.

That is, the plate 16 which is distinguished by the neck part 14 is formed in the upper side of the neck part 14 mentioned above, the bolt sheet is formed in the plate 16, and the female thread is formed in the tool holder 10 side. The bolt 18 is fitted to the bolt seat described above and fastened to the female screw formed on the tool holder 10 side.

Further, a lower jaw 22 is formed on the upper side of the blade 20 described above, and an upper jaw 24 is formed on the inner side of the slit 12 opposite to the lower jaw 22.

The lower jaw 22 may have a slot having an inverted V-shape formed on an upper surface thereof, and a V-shaped slot may be formed on a lower surface of the upper jaw 24 described above.

That is, the cutting insert 30 is sandwiched between the lower jaw 22 and the upper jaw 24, and the cutting insert 30 is assembled to the slots inside the lower jaw 220 and the upper jaw 24. Do not deviate laterally.

In addition, when the bolt 18 is tightened, the cutting insert 30 disposed between the lower jaw 22 and the upper jaw 24 is fixed, and at this time, a working line O _{1 in} which a tightening force is applied by tightening the bolt 18. ) And the working line (O ₂ ) for crimping the cutting insert 30 are shifted from each other as shown in FIG. 2 (b), and thus there is a limit to fixing the cutting insert 30 even if the bolt 18 is tightened strongly. Thereby, there is a problem that chattering occurs during cutting or grooving.

Another conventional technique has been proposed to secure the blade to the head of the tool holder by separately providing a blade to which the cutting insert is installed and a tool holder, and the blade is known as a removable and replaceable configuration.

A technique relating to a tool holder for replacing the blade as described above is a tool holder with a removable blade WO 2000/51768.

The conventional tool holder described above comprises a tool holder having a tool holder for fixing a blade designed to protect and support the cutting insert, a tool holder upper surface portion, a tool holder end surface and a tool holder side surface.

The above-described conventional tool holder is a structure that is fastened directly through the screw on the blade as a screw space is necessary, thereby increasing the thickness of the blade, there is a problem that the rigidity of the tool holder is relatively reduced, and the blade Chattering may occur because there is no upper fastening force on the side.

As another conventional technology, there is a Republic of Korea Patent Application Publication No. 10-2007-0090756 insert removable tool and Republic of Korea Patent Publication No. 10-2008-0003202 insert removable tool.

In the above-described insert removable tool, the cutting insert is fixed to the blade, and the blade is fixed to the head of the tool, wherein the blade is fixed by the bolt fastened obliquely, and when the inclined bolt is used, the cutting insert is fixed. An abnormal twist of the upper jaw among the upper jaw and the lower jaw may occur, and the upper jaw twist may not securely support the cutting insert, and even the cutting insert may be arbitrarily separated, thereby causing a risk of a safety accident.

Therefore, the technical problem to be achieved by the present invention is a groove for machining a blade so that the blade is firmly supported in the axial direction and the vertical direction to withstand the cutting resistance applied to the blade during metal cutting processing, and to prevent the degradation of the tool holder by the blade The object is to provide a tool holder.

Another object of the present invention is to provide a tool holder for grooving to minimize the shaking of the cutting insert and the blade during machining.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, another technical problem that is not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

Grooving tool holder according to the present invention for achieving the above technical problem, the clamp pocket is formed on the upper side of the head, the female thread is formed in the clamp pocket, the first, second fastening female screw and the binding female screw on one side of the head Formed holder; Disposed on one side of the head and formed with a slit on the upper side to form a binding hole inside the slit, a bolt sheet is formed on one side of the binding hole, and the other side of the binding hole is recessed at a position lower than the surface of the bolt sheet. A blade having a lower jaw and an upper jaw formed therein to receive the cutting insert in the slit and having first and second fastening holes formed at one side thereof; First and second fastening bolts respectively inserted into the first and second fastening holes and fastened to the first and second fastening female screws to fix the blades to the head; A binding bolt inserted into the binding hole and fastened to the binding female screw and disposed to contact the bolt sheet and to form a gap with the recess; A clamp receiving a clamp body in the clamp pocket, a clamping plate configured to press the upper side of the blade on one side of the clamp body, and a clamp female screw formed inside the clamp body; And a double screw fastened to both ends of the female screw and the clamp female screw.

In addition, the recess may be formed at an upper side with respect to the slit when the bolt sheet to the front so that the binding bolt and the contact force does not interfere with the flow of the upper jaw.

In addition, the inner shape of the clamp pocket and the outer shape of the clamp body may be formed in a polygonal shape so that the clamp does not run in the clamp pocket.

Specific details of other embodiments are included in the detailed description and the drawings.

The tool holder for grooving according to the embodiment of the present invention made as described above can firmly fix the blade to the tool holder, and also has a force action line acting on the upper jaw and the cutting insert when fixing the cutting insert to the blade. By matching the center, the cutting insert can be supported more firmly.

In addition, when the blade is fixed to the side of the tool holder can be firmly fixed by a plurality of bolts it is possible to minimize the occurrence of chattering, such as shaking vibrations during metal processing.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Like reference numerals refer to like elements throughout.

Hereinafter, the grooving tool holder 100 according to the exemplary embodiment of the present invention will be described with reference to FIGS. 3 and 4.

3 and 4 are exemplary views illustrating an assembled state and an exploded state for explaining a grooving tool holder according to an exemplary embodiment of the present invention.

As shown in FIGS. 3 and 4, the tool holder 100 has a clamp pocket 120 formed above the head 110, a clamp 170 is installed in the pocket 120, and the above-described head ( The blade 150 is fastened to the side of the 110.

A female screw 122 is formed at the bottom of the clamp pocket 120, and an inner surface of the clamp pocket 120 may be formed in a polygonal shape.

In addition, the blade sheet 130 may be formed on one side of the above-described head 110 so that the above-described blade 150 is installed, the above-described blade sheet 130 is a plurality of first, Second fastening female screws 134 and 135 are formed, and the binding female screw 136 is formed at a position spaced apart from the plurality of first and second fastening female screws 134 and 135.

Further, first and second side sheets 137 and 138 are formed on the lower side and the side of the blade sheet 130 described above, respectively, and the surface of the base sheet 132 and the first side sheet 137 described above. ) Or the angle formed by the surface of the second site sheet 138 may be an acute angle (a), whereby the blade 150 is more tightly coupled to the blade sheet 130 so that the blade 150 may randomly deviate outward. Will be prevented.

The above-described blade 150 has a slit 152 formed at an upper side thereof, a neck part 154 is formed at one rear side of the slit 152, and a lower side of the slit 152 based on the slit 152. The lower jaw 162 is formed, and the upper jaw 163 is formed above the slit 152.

V-shaped slits may be formed on the side where the lower jaw 162 and the upper jaw 163 face each other, and the cutting insert 30 is coupled to the slits so that the cutting insert 30 moves laterally. Can be suppressed.

Further, the first and second fastening holes 156 and 157 are formed at positions corresponding to the first and second fastening female screws 134 and 135 described above on the side of the blade 150 as described above.

In addition, a binding hole 158 is formed at the inner end of the slit 152, a bolt sheet 167 is formed at one side of the binding hole 158 described above, and the other end of the binding hole 158 is formed at the other end thereof. A recess 168 is formed that is lower than the surface of the bolt sheet 167 described above.

The recess 168 described above is formed on the upper side of the slit 152 described above when the bolt sheet 167 is described as the front, and the binding bolt 166 and the contact force interfere with the flow of the upper jaw 163. May not be.

In addition, the above-described binding hole 158 may be formed at a position corresponding to the above-described binding female screw 136.

In addition, the blade 150 described above has first and second side surfaces 151a and 151b in contact with the first and second side sheets 137 and 138 described above, and the first and second side surfaces 151a. ) 151b is the surface of the base sheet 132 and the above-described first side 151a or second side 151b to be in close contact with the first and second side sheets 137 and 138 as shown in FIG. 6. The angle formed by the surface of may be an acute angle (a).

First and second fastening bolts 164 and 165 are inserted into the first and second fastening holes 156 and 157 and fastened to the first and second fastening female screws 134 and 135, respectively. A binding bolt 166 may be inserted into the binding hole 158 to be fastened to the binding female screw 136. In this case, the binding bolt 166 may be a bolt having a flat head, and more specifically, a round bolt. It may be a head type bolt.

The above-described clamp 170 is formed by protruding the pressing table 174 on one side of the clamp body 172 and the clamp female screw 176 is formed in the center of the clamp body 172.

In addition, the outer shape of the clamp body 172 described above may be formed in a polygonal shape, and more specifically, may be a shape similar to the inner shape of the clamp pocket 120 described above, whereby the clamp body 172 is clamped The clamp 170 may be prevented from rotating in any direction while being inserted into the pocket 120.

In addition, the pressure bar 174 may be formed to protrude to a predetermined length, and the end of the pressure bar 174 may be disposed to contact the upper side 159 of the blade 150 described above.

In addition, the lower surface of the pressing table 174 described above may be formed to be inclined in a direction in which the outer side is downward, the upper side 159 of the blade 150 described above also in the same direction as the lower surface of the pressing table 174 described above. It may be formed to be inclined, thereby preventing the blade 150 from moving outward when the pressure bar 174 is pressed to the upper side 159 of the blade 150.

Both sides of the double screw 180 may be fastened to the female screw 122 formed in the clamp pocket 120 and the clamp female screw 176 of the clamp 170 described above.

As shown in FIG. 4, the above-described double screw 180 has first and second male threads 182 and 184 formed on the upper side and the lower side, respectively, in which the first male thread 182 and the second male thread 184 are formed. ), The spiral direction can be different.

That is, as an example, when the aforementioned double screw 180 is rotated in the clockwise direction, the double screw 180 and the female screw 122 of the clamp pocket 120 are tightened, and the clamp 170 is moved in the downward direction. .

On the contrary, when the double screw 180 is rotated counterclockwise, the double screw 180 is released from the female screw 122 and the clamp 170 is raised.

As described above, when the double screw 180 is rotated in either direction, the clamp 170 descends to press the upper side 159 of the blade 150, and when the double screw 180 is reversely rotated, The clamp 170 is raised to release the pressure applied to the blade 150.

Hereinafter, the operation of the grooving tool holder 100 according to an embodiment of the present invention configured as described above will be described with reference to FIGS. 5 and 6.

Figure 5 is an exemplary view showing a plane, front and side for explaining the operation of the grooving tool holder 100 according to an embodiment of the present invention, Figure 6 is an attached view according to an embodiment of the present invention In the grooving tool holder 100, it is an exemplary cross-sectional view illustrating an example in which the blade 150 is mounted on one side of the tool holder.

The blade 150 is installed on the blade seat 130 by the tightening force of the first and second fastening bolts 164 and 165, and the lower jaw 162 and the upper jaw 163 of the blade 150 are described above. The cutting insert 30 is arrange | positioned in between.

Thereafter, when the double screw 180 is tightened, the clamp 170 descends, and the pressure bar 174 presses the upper side 159 of the blade 150, and the pressing force causes elastic deformation in the neck part 154 to cause the upper part to rise. The jaw 163 causes the cutting insert 30 to be pressed.

Here, the force line of action of the pressing table 174 coincides with the center line of the cutting insert 30, as shown in (a) and (b) of FIG. 5, thereby preventing distortion of the blade 150, thereby cutting the cutting insert 30 ) Can be fastened in a more stable posture and in a stable direction.

In addition, by pressing the blade 150 by the clamp 170 as described above, it is possible to form a narrow width of the blade 150, thereby making it possible to form a wide width of the head 110 in a wide range of tools The rigidity of the holder 100 can be improved.

In addition, although the blade 150 is bound by the first and second fastening bolts 164 and 165, stress may be concentrated in a portion where the cutting insert 30 is disposed during metal processing, and in particular, the stress is The neck part 154 may be concentrated so that the neck part 154 may be weak.

However, in the tool holder 100 according to an embodiment of the present invention, a portion adjacent to the neck part 154 may be bound by the binding bolt 166, and in particular, the head of the binding bolt 166 as shown in FIG. 6. Is bound while applying pressure to a portion of the blade 150 to secure the blade 150 more firmly.

In addition, since the above-described binding bolt 166 has a recess 168 and a gap t, a tightening force for tightening the binding bolt 166 may not be directly applied to the upper jaw 163, thereby providing an upper portion. The jaw 163 can be flexible to movement in the vertical direction.

That is, the upper jaw 163 is moved in the vertical direction by the tightening force of the clamp 170 to clamp the cutting insert 30 more firmly, thereby minimizing the chattering that occurs during metal processing. Furthermore, the surface roughness of the cutting surface can be improved.

Although the 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 can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. There will be.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is represented by the following detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

Grooving tool holder according to an embodiment of the present invention can be used to replace the damaged blade and the end of life cutting insert with a new blade and cutting insert.

1 and 2 is an exemplary view showing a perspective view, a front view and a side for explaining a conventional tool holder for grooving.

3 and 4 are exemplary views of an assembled state and an exploded state for explaining a grooving tool holder according to an embodiment of the present invention.

Figure 5 is an exemplary view showing a plane, front and side for explaining the operation of the grooving tool holder according to an embodiment of the present invention.

6 is an exemplary cross-sectional view for explaining an example in which the blade is mounted on one side of the tool holder in the grooving tool holder according to an embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

10: tool holder 12: slit

14: neck part 16: plate

18: Bolt 20: Blade

22: lower jaw 24: upper jaw

30: cutting insert

100: tool holder 110: head

120: clamp pocket 122: internal thread

130: blade sheet 132: base sheet

134, 135: 1st, 2nd tightening female thread 136: Binding female thread

137 and 138: first and second side sheets

150: blades 151a, 151b: first and second side surfaces

152: slit 154: neck parts

156, 157: first and second fastening holes 158: binding holes

159: upper side 162: lower jaw

163: upper jaw 164, 165: first and second fastening bolt

166: binding bolt 167: bolt sheet

168 recess

170: clamp 172: clamp body

174: pressure plate 176: clamp female thread

180: double screw 182, 184: 1st, 2nd external thread

Claims (3)

The clamp pocket 120 is formed on the upper side of the head 110, the female thread 122 is formed on the clamp pocket 120, and the first and second fastening female screws 134 and 135 are disposed on one side of the head 110. And a holder 100 in which the binding female screw 136 is formed; A slit 152 is formed on the upper side to form a binding hole 158 inside the slit 152, a bolt sheet 167 is formed on one side of the binding hole 158, and the other of the binding hole 158 is formed. A recess 168 is formed at a position lower than the surface of the bolt sheet 167 on one side, and a lower jaw 162 and an upper jaw 163 for accommodating the cutting insert 30 inside the slit 152. Is formed and the first and second fastening holes 156 and 157 are formed on one side of the blade 150 is disposed on one side of the head 110; Inserted into the first and second fastening holes 156 and 157, respectively, and fastened to the first and second fastening female screws 134 and 135, respectively, to fix the blade 150 to the head 110. First and second fastening bolts 164 and 165; A binding bolt 166 inserted into the binding hole 158 and fastened to the binding female screw 136 and disposed to be in contact with the bolt seat 167 and to form a gap t with the recess 168; A clamp body 172 is accommodated in the clamp pocket 120, and one side of the clamp body 172 is provided with a pressing table 174 for pressing the upper side 159 of the blade 150 and the clamp body. A clamp 170 having a clamp female screw 176 formed therein; And A double screw 180 having both ends fastened to the female screw 122 and the clamp female screw 176; Grooving tool holder comprising a. The method of claim 1, The recess 168 is formed at an upper side with respect to the slit 152 when the bolt sheet 167 is faced so that contact force with the binding bolt 166 is not hindered from flowing in the upper jaw 163. Grooving tool holder, characterized in that not. The method of claim 1, The inner shape of the clamp pocket (120) and the outer shape of the clamp body (172) is formed in a polygonal shape so that the clamp (170) in the clamp pocket (120), the tool holder for grooving, characterized in that configured.

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