摘要:
The invention relates to a method for finishing a surface of a workpiece by means of forming a third body utilizing a metal-cutting surface processing tool. The invention is characterized by the combination of the following process steps: providing a surface processing tool having a blade, the blade edge rounding r ß of which approximately corresponds to a cutting depth h by which the blade penetrates into the tool during the surface processing, contacting the surface processing tool at the surface to be processed at a prescribed processing speed v c such that a) a plastic deformation occurs in the region of a deformation advancing zone advancing the surface processing tool at a shear stress that causes a flow stress to occur which can be associated with the surface region, b) the surface end region to be finished is subjected to a strain rate increase to at least 10 s -1 , followed by a strain rate decrease of the same magnitude as the strain rate increase, and c) the surface end region to be finished is subjected to a temperature increase of at least 1-10 3 Ks -1 , followed by a cooling phase having a temperature change speed comparable to that of the heating phase.
摘要:
An assembly-type cutter (10) includes a shank (20) and a cutter head (30). The shank (20) has a hole (201) at one end. The hole (201) has a receiving portion (21), which includes an internal thread (212) and can be treated thermally for increased rigidity. The cutter head (30) has a cutting portion (32) and a connecting portion (31) at opposite ends respectively. The connecting portion (31) includes a threaded member (312) and can also be treated thermally for increased rigidity. The cutter head (30) and the shank (20) are threadedly connectable via the connecting portion (31) and the receiving portion (21). The threaded member (312) includes a body portion (3121), whose diameter is defined as a root diameter (Di), and an external thread (3122) on the body portion (3121). The body portion (3121) is slightly tapered such that a locus of the root diameter (Di) is inclined.
摘要:
A surface-coated cutting tool of the present invention includes: a hard coating layer which is vapor-deposited on a surface of a tool body made of tungsten carbide-based cemented carbide and has an average thickness of 2 µm to 10 µm, in which (a) the hard coating layer comprises a layer made of complex nitride of Al, Cr, and B in which a ratio (atomic ratio) of the amount of Cr is 0.2 to 0.45 and a ratio (atomic ratio) of the amount of B is 0.01 to 0.1 to the total amount of Al, Cr, and B, and (b) in an area within 100 µm from an edge tip on a flank face of the surface-coated cutting tool, the hard coating layer has a granular crystal grain structure, the average grain size of granular crystal grains is 0.1 µm to 0.4 µm on the surface of the hard coating layer, the average grain size of granular crystal grains on the boundary surface between the tool body and the hard coating layer is 0.02 µm to 0.1 µm smaller than that on the surface of the hard coating layer, and a grain size length ratio of crystal grains having a grain size of 0.1 µm or less is 20% or less.
摘要:
Provided is a method of machining a sealing surface, the method being capable of finishing a sealing surface at low cost and in a short period of time, eliminating lead marks, and forming the sealing surface highly accurately. The method of machining a sealing surface comprises finishing a sealing surface (M), which is to be machined, by cutting the sealing surface (M) using a rotating cutting tool (81) while rotating a workpiece having the sealing surface (M) about an axis thereof. The cutting of the sealing surface (M) using the rotating cutting tool (81) comprises hardened steel cutting which generates no lead marks.
摘要:
[Problem] While a configuration is equivalent to a configuration where a cutting edge portion of a tool includes a core, cutting ability is provided to a part near a center of a tool end surface to secure an ability of handling a thrust process and a helical process that allow a cutting at the center part. [Solution] A cutting edge portion 1 includes gashes 8 and 9 between cutting edges 1A and 1A adjacent in a rotation direction. Center cut edges 10a to 10f are formed at parts of end cutting edges 2a to 2f constituting the cutting edges 1A close to a rotation axis O so as to face the rotation axis O. Center grooves 10A to 10F are formed on rear sides of the center cut edges 10a to 10f and the end cutting edges 2a to 2f in the rotation direction continuous with a radial direction. The center grooves 10A to 10F are continuous with positions where end cutting edge second surfaces 4a to 4f face the rotation axis O. Alternatively, the center grooves 10A to 10F are continuous with positions where the end cutting edge second surfaces 4a to 4f approach the rotation axis O. The end cutting edge second surfaces 4a to 4f are laid between the center cut edges 10a to 10f and the end cutting edges 2a to 2f. The center grooves 10A to 10F are formed between the end cutting edge second surfaces 4a to 4f and the center cut edges 10a to 10f positioned on a rear side of the end cutting edge second surfaces 4a to 4f in the rotation direction. The center grooves 10A to 10F pass on the rotation axis O. The center grooves 10A to 10F double as rake faces of the respective center cut edges 10a to 10f. The center grooves 10A to 10F are continuous with the gashes 8.
摘要:
The invention relates to a rotary tool (10, 40, 60, 80, 100, 120, 150) for the chip-forming machining of workpieces, comprising at least one main body (152). The at least one main body has a clamping segment (82, 136, 14), a tool head (12, 42, 62, 84, 102, 122, 156) having one or more chip-forming edges (14, 22, 46, 48, 68, 96, 112, 116, 134, 138, 158, 162) that form a chip-forming region, and at least one coolant channel (24, 52, 66, 88, 106, 126, 164) for feeding a cooling and lubricating fluid into the chip-forming region of the tool head (12, 42, 62, 84, 102, 122, 156). According to the invention at least one partial surface section of the chip-forming region forms a hardening region (26, 54, 72, 90, 114, 130, 166), which covers and/or bounds the coolant channel (24, 52, 66, 88, 106, 126, 164) and is surface-hardened. In a secondary aspect, the invention further relates to a production method for a rotary tool (10, 40, 60, 80, 100, 120, 150) having at least one coolant channel (24, 52, 66, 88, 106, 126, 164) in the chip-forming region of the tool head (12, 42, 62, 84, 102, 122, 156), which coolant channel is covered by at least one hardening region (26, 54, 72, 90, 114, 130, 166).
摘要:
A surface-coated cutting tool of the present invention includes: a hard coating layer which is vapor-deposited on a surface of a tool body made of tungsten carbide-based cemented carbide and has an average thickness of 2 µm to 10 µm, in which (a) the hard coating layer comprises a layer made of complex nitride of Al, Cr, and B in which a ratio (atomic ratio) of the amount of Cr is 0.2 to 0.45 and a ratio (atomic ratio) of the amount of B is 0.01 to 0.1 to the total amount of Al, Cr, and B, and (b) in an area within 100 µm from an edge tip on a flank face of the surface-coated cutting tool, the hard coating layer has a granular crystal grain structure, the average grain size of granular crystal grains is 0.1 µm to 0.4 µm on the surface of the hard coating layer, the average grain size of granular crystal grains on the boundary surface between the tool body and the hard coating layer is 0.02 µm to 0.1 µm smaller than that on the surface of the hard coating layer, and a grain size length ratio of crystal grains having a grain size of 0.1 µm or less is 20% or less.
摘要:
Provided is a method of machining a sealing surface, the method being capable of finishing a sealing surface at low cost and in a short period of time, eliminating lead marks, and forming the sealing surface highly accurately. The method of machining a sealing surface comprises finishing a sealing surface (M), which is to be machined, by cutting the sealing surface (M) using a rotating cutting tool (81) while rotating a workpiece having the sealing surface (M) about an axis thereof. The cutting of the sealing surface (M) using the rotating cutting tool (81) comprises hardened steel cutting which generates no lead marks.
摘要:
Provided is a method of machining a sealing surface, the method being capable of finishing a sealing surface at low cost and in a short period of time, eliminating lead marks, and forming the sealing surface highly accurately. The method of machining a sealing surface comprises finishing a sealing surface (M), which is to be machined, by cutting the sealing surface (M) using a rotating cutting tool (81) while rotating a workpiece having the sealing surface (M) about an axis thereof. The cutting of the sealing surface (M) using the rotating cutting tool (81) comprises hardened steel cutting which generates no lead marks.