Insert and tool holder for mounting same

Abstract

Provided is an insert for being mounted on a tool holder. The insert includes three substantially right-angled corners along a perimeter, a main cutting edge, a sub cutting edge, and a flat lower surface. A clearance angle of a second end main side surface forms an obtuse angle with respect to a lower surface, and a clearance angle of a second end sub side surface forms an obtuse angle with respect to the lower surface. A clearance angle of a first end main side surface forms a right angle with respect to the lower surface, and a clearance angle of a first end sub side surface forms a right angle with respect to the lower surface.

Claims

1. An insert for use in and being mounted on a tool holder, the insert comprising: three substantially right-angled corners along a perimeter; a main cutting edge formed on an edge between an upper surface and a main side surface, and a sub cutting edge formed on an edge between the upper surface and a sub side surface, wherein the main cutting edge and the sub cutting edge are placed in succession between the corners; and a flat lower surface, wherein: the main cutting edge forms an inclination angle such that a height decreases gradually in a direction toward the sub cutting edge, the main side surface is formed by a first end main side surface in contact with the main cutting edge, and a second end main side surface in contact with the lower surface, wherein the first end main side surface and the second end main side surface are formed in succession with different clearance angles from each other, the sub side surface is formed by a first end sub side surface in contact with the sub cutting edge, and a second end sub side surface in contact with the lower surface, wherein the first end sub side surface and the second end sub side surface are formed in succession with different clearance angles with each other, a clearance angle of the second end main side surface forms an obtuse angle with respect to the lower surface, and a clearance angle of the second end sub side surface forms an obtuse angle with respect to the lower surface, the clearance angle of the second end main side surface with respect to the lower surface is greater than the clearance angle of the second end sub side surface with respect to the lower surface, a clearance angle of the first end main side surface forms a right angle with respect to the lower surface, and a clearance angle of the first end sub side surface forms a right angle with respect to the lower surface, and both of the first end main side surface and the first end sub side surface, when the insert is mounted on the tool holder, are surface-contacted with the tool holder.

2. The insert of claim 1, wherein an inclined surface is formed on the upper surface, and inclined downwardly in a direction from the main cutting edge toward a center of the upper surface.

3. A tool holder for mounting the insert of claim 2, comprising: a lower surface seat having a same shape as the lower surface to be surface-contacted with the lower surface; a main side surface seat having a same shape as the first end main side surface to be surface-contacted with the first end main side surface; and a sub side surface seat having a same shape as the first end sub side surface to be surface-contacted with the first end sub side surface.

4. A tool holder for mounting the insert of claim 1, comprising: a lower surface seat having a same shape as the lower surface to be surface-contacted with the lower surface; a main side surface seat having a same shape as the first end main side surface to be surface-contacted with the first end main side surface; and a sub side surface seat having a same shape as the first end sub side surface to be surface-contacted with the first end sub side surface.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a perspective view illustrating an insert according to an embodiment of the present disclosure.

(2) FIG. 2 is a side view illustrating a main side surface and a sub side surface in parallel with each other, of the insert of FIG. 1.

(3) FIG. 3 is a side view seen from a corner side, to show the first end main side surface and the sub side surface, and the second end main side surface altogether, of the insert of FIG. 1.

(4) FIG. 4 is a plan view illustrating an upper surface of the insert of FIG. 1.

(5) FIG. 5 is a bottom perspective view illustrating the upper surface of the insert of FIG. 1.

(6) FIG. 6 is a perspective view illustrating an assembly of an insert and a tool holder according to an embodiment of the present disclosure.

(7) FIG. 7 is a side view seen from a corner side, to show the first end main side surface and the sub side surface, and the second end main side surface altogether, of a related double sided insert.

(8) FIG. 8 is a perspective view illustrating the double sided insert of FIG. 7.

MODE FOR THE INVENTION

(9) Certain exemplary embodiments of the present inventive concept will be described in greater detail with reference to the accompanying drawings to enable those skilled in the art to work the present disclosure. However, it is not intended to limit the technology described herein to any specific embodiments, as it should be construed as encompassing various modifications, equivalents and/or alternatives of the embodiments.

(10) FIG. 1 is a perspective view illustrating an insert according to an embodiment of the present disclosure, FIG. 2 is a side view illustrating a main side surface and a sub side surface in parallel with each other, of the insert of FIG. 1, and FIG. 3 is a side view seen from a corner side, to show the first end main side surface and the sub side surface, and the second end main side surface altogether, of the insert of FIG. 1.

(11) FIG. 4 is a plan view illustrating an upper surface of the insert of FIG. 1, and FIG. 5 is a bottom perspective view illustrating the upper surface of the insert of FIG. 1.

(12) As illustrated in FIGS. 1 to 5, the insert 100 according to an embodiment of the present disclosure has three or more corners C1, C2, C3 along a perimeter; a main cutting edge 142 formed on an edge between the upper surface 110 and the main side surface 131, and a sub cutting edge 142 formed on an edge between the upper surface 110 and the sub side surface 132, in which the main cutting edge 142 and the sub cutting edge 142 are placed in succession between the corners (i.e., between C1 and C2, between C2 and C3, between C3 and C1); and a flat lower surface 120. For example, the corners C1, C2, C3 may have approximately right-angled shape, and there may be three corners provided. In particular, as illustrated in FIGS. 2 and 3, the main cutting edge 141 may form such an inclination angle (?1 of FIG. 2) that the height is gradually decreased as closer toward the direction of the sub cutting edge 142.

(13) Accordingly, in combination with the insert 100 in which the main cutting edge 141 and the sub cutting edge 142 are processed on only one surface, a technical configuration is incorporated, in which an inclination angle (?1 of FIG. 2) is formed such that the height is gradually decreased as the main cutting edge 141 becomes closer toward the direction of the sub cutting edge 142. Accordingly, unlike the related double sided insert that is processed with the cutting edges on both of the surfaces, sufficient inclination angle (?1 of FIG. 2) can be provided to the main cutting edge 141, without requiring the thickness (i.e., height between the upper surface 110 and the lower surface 120) to be increased, and without requiring the length of the main cutting edge 141 to be reduced. As a result, enhanced machinability, such as increased cutting depth, and so on, can be provided.

(14) In addition, as illustrated in FIGS. 1 to 3, and 5, the main side surface 131 described above is formed by the first end main side surface 131a in contact with the main cutting edge 141 and the second end main side surface 131b in contact with the lower surface 120, in which the first end main side surface 131a and the second end main side surface 131b are formed in succession with different clearance angles (?11, ?12 in FIG. 2) from one another, and the sub side surface 132 is formed by the first end sub side surface 132a in contact with the sub cutting edge 142, and the second end sub side surface 132b in contact with the lower surface 120, in which the first end sub side surface 132a and the second end sub side surface 132b are formed in succession with different clearance angles (?21, ?22 in FIG. 3) from one another.

(15) Accordingly, by incorporating a technical configuration in which the main side surface 131 has the first and second end main side surfaces 131a, 131b with different clearance angles (?11, ?12 in FIG. 2) from one another, and also by incorporating a technical configuration in which the sub side surface 132 has the first and second end sub side surfaces 132a, 132b with different clearance angles (?21, ?22 in FIG. 3) from one another, coupling with the tool holder 200 (FIG. 6) can be enhanced using the first end main side surface 131a and the first end sub side surface 132a, and interference between the tool holder 200 and the workpiece (not illustrated) can be reduced using the second end main side surface 131b and the second end sub side surface 132b.

(16) Moreover, the clearance angle (?12) of the second end main side surface 131b and the clearance angle (?22) of the second end sub side surface 132b may each form an obtuse angle with respect to the lower surface 120.

(17) Accordingly, the clearance angles (?12, ?22) of the second end may maintain the second end main side surface 131b and the second end sub side surface 132b of the insert 100, and the tool holder 200 on which the lower surface 120 of the insert 100 is seated, at a distance apart from the bottom surface and the side surface of the workpiece (not illustrated). As a result, interference with the workpiece can be minimized.

(18) Further, the clearance angle (?12) of the second end main side surface 131b with respect to the lower surface 120 may be greater than the clearance angle (?22) of the second end sub side surface 132b with respect to the lower surface 120. Accordingly, interference of the tool holder 200 with the side surface of the workpiece (not illustrated), which is subject to relatively strong contact resistance by the contact with the main cutting edge 141, can be minimized.

(19) Further, the clearance angle (?11) of the first end main side surface 131a with respect to the lower surface 120, and the clearance angle (?21) of the first end sub side surface 132a with respect to the lower surface 120 may each be less than the clearance angle (?22) of the second end sub side surface 132b with respect to the lower surface 120. In a preferred embodiment, the clearance angle (?11) of the first end main side surface 131a and the clearance angle (?21) of the first end sub side surface 132a may each form right angle with respect to the lower surface 120. Such difference in the clearance angles can enhance coupling with the tool holder 200 through the first, and also reduce interference between the tool holder 200 and the workpiece through the second end.

(20) Further, an inclined surface 111 may be formed on the upper surface 110, which is downwardly inclined in a direction from the main cutting edge 141 to the center of the upper surface 110. Accordingly, instead of being tangled with each other, the chips (not illustrated) peeled off from the workpiece (not illustrated) can be easily conveyed along the inclined surface 111 to be discharged out.

(21) Hereinbelow, the tool holder 200 according to an embodiment of the present disclosure will be described.

(22) FIG. 6 is a perspective view illustrating an assembly of an insert and a tool holder according to an embodiment of the present disclosure.

(23) As illustrated in FIG. 6, the tool holder 200 according to an embodiment of the present disclosure includes a lower surface seat 210, a main side surface seat 220, and a sub side surface seat 230.

(24) The lower surface seat 210 receives the lower surface 120 of the insert 100 seated thereon, and has a flat shape like the lower surface 120 to enable surface-contact with the lower surface 120 of the insert 100. Further, a screw hole 201 is formed in the lower surface seat 210 at a location corresponding to a through hole 101 of the insert 100. For reference, a bolt B passed through the through hole 101 may be engaged with the screw hole 201.

(25) The main side surface seat 220 receives the first end main side surface 131a of the insert 100 seated thereon, and has a shape corresponding to the first end main side surface 131a to allow surface contact.

(26) The sub side surface seat 230 receives the first end sub side surface 132a of the insert 100 seated thereon, and has a shape corresponding to the first end sub side surface 132a to allow surface contact.

(27) Accordingly, coupling between the tool holder 200 and the insert 100 can be enhanced, since the lower surface 120, the first end main side surface 131a, and the first end sub side surface 132a of the insert 100 are brought into a tight surface-contact with the lower surface seat 210, the main side surface seat 220 and the sub side surface seat 230 of the tool holder 200, and then coupled by the bolt B.

(28) As described above, the insert 100 and the tool holder 200 for mounting the same according to embodiments of the present disclosure can provide the following effects.

(29) According to an embodiment of the present disclosure, in combination with a technical configuration of the insert 100 which has the main cutting edge 141 and the sub cutting edge 142 processed on only one surface, technical configurations are provided, which are: a technical configuration in which the main cutting edge 141 forms an inclination angle (?1 of FIG. 2) such that the height is gradually decreased in a direction toward the sub cutting edge 142; a technical configuration in which the main side surface 131 is formed by the first end main side surface 131a in contact with the main cutting edge and the second end main side surface 131b in contact with the lower surface 120, in which the first end main side surface 131a and the second end main side surface 131b are formed in succession with different clearance angles (?11, ?12 of FIG. 2) from each other; and a technical configuration in which the sub side surface 132 is formed by the first end sub side surface 132a in contact with the sub cutting edge 142 and the second end sub side surface 132b in contact with the lower surface 120, in which the first end sub side surface 132a and the second end sub side surface 132b are formed in succession with different clearance angles (?21, ?22 of FIG. 3) from each other. Accordingly, compared to a double sided insert which has cutting edges processed on both of the surfaces, it is possible to give sufficient inclination angle (?1 of FIG. 2) to the main cutting edge 141 to thus provide enhanced machinability such as increased cutting depth, and so on, without requiring the thickness (i.e., height between the upper surface 110 and the lower surface 120) to be increased, and without requiring the length of the main cutting edge 141 to be reduced. Further, by including the first and second end main side surfaces 131a, 131b with different clearance angles (?11, ?12 of FIG. 2) from each other, and the first and second end sub side surfaces 132a, 132b with different clearance angles (?21, ?22) from each other, it is possible to enhance coupling with the tool holder 200 (FIG. 6) by using the first end main side surface 131a and the first end sub side surface 132a, and also minimize interference between the tool holder 200 and the workpiece (not illustrated) by using the second end main side surface 131b and the second end sub side surface 132b.

(30) Further, according to an embodiment of the present disclosure which provides a technical configuration in which the clearance angle (?12 of FIG. 2) of the second end main side surface 131b with respect to the lower surface 120 is greater than the clearance angle (?22 of FIG. 3) of the second end sub side surface 132b, interference of the tool holder 200 can be minimized, with respect to the side surface of the workpiece (not illustrated) that is subject to a relatively strong contact resistance by the contact with the main cutting edge 141.

(31) The foregoing exemplary embodiments and advantages are merely exemplary and are not to be construed as limiting the exemplary embodiments. The present teaching can be readily applied to other types of apparatuses. Also, the description of the exemplary embodiments of the present inventive concept is intended to be illustrative, and not to limit the scope of the claims.

INDUSTRIAL APPLICABILITY

(32) The present disclosure relates to an insert and a tool holder for mounting the same, and has industrial applicability, since it is applicable to cutting of a workpiece.