CN220782273U - Cutting insert for finishing - Google Patents

Abstract

The utility model discloses a cutting blade for finish machining, relates to the technical field of cutting blades, and aims to solve the problems that in the existing cutting blade, chips are broken through an anti-chip table in the cutting process, when thin chips are broken, very fine particle particles are formed, and the chips are splashed everywhere to damage workpieces and cutters. The cutting blade comprises a cutting blade body, wherein the cutting blade body is prismatic and comprises a top surface, a bottom surface, an inner hole penetrating the top surface and the bottom surface, and a plurality of side surfaces connecting the top surface and the bottom surface, wherein the side surfaces are connected by a plurality of circular arc surfaces, the top surface and the side surfaces are intersected to form a main cutting edge, the top surface and the circular arc surfaces are intersected to form a cutter point, the main cutting edge firstly forms a certain included angle with the horizontal direction to extend towards the bottom surface and then extends towards the top surface until reaching the top surface, the cutter point firstly extends towards the inner hole direction to form a front cutter surface, and then extends towards the top surface until reaching the top surface to form a protruding part, so that the protruding part, the cutter point, the front cutter surface, the main cutting edge and the top surface form an oversized chip pocket.

Description

Cutting insert for finishing

Technical Field

The utility model relates to the technical field of cutting blades, in particular to a cutting blade for finish machining.

Background

In modern cutting machining, turning is a machining process which is relatively simple to define and most widely applied, and is classified into rough machining turning, semi-finish machining turning and finish machining turning, wherein the finish machining turning is mainly characterized by small cutting depth and small feeding, and the primary task of finish machining is to meet the size requirement and the appearance requirement of the main working surface of a workpiece. The steel part is finished into a groove, the required cutting force is small, the chip breaking is reliable, and the workpiece can obtain ideal machining precision and surface finish.

Conventionally, patent No. CN200880105104.1 is a chip breaking protrusion formed on the most corner side of a protrusion portion located on the upper surface of the inner side of a chip breaking groove along a corner, a chip breaking wall surface formed by connecting the chip breaking protrusion so as to protrude upward from the chip breaking protrusion, and a chip breaking side surface formed by connecting the chip breaking wall surface. The breaker wall surface is formed so as to be narrower in width as going toward the protruding direction of the breaker wall surface, and is inclined so as to be located at a higher position as going away from the corner. The chip breaking side surface is formed so as to be wider as it is separated from the corner. The height of the chip breaking protrusion is less than half of the height of the top of the chip breaking wall surface and is lower than the height of the cutting edge along the corner, and the chip is broken through the chip breaking table in the cutting process, so that very fine particle particles are formed when the thin chip breaks, and the chip splashes everywhere to damage a workpiece and a cutter; we have therefore proposed a cutting insert for finishing in order to solve the problems set out above.

Disclosure of Invention

The present utility model aims to provide a cutting insert for finishing to solve the problems that the existing cutting insert proposed in the prior art can form very fine particles when thin chips are broken, and the chips are scattered everywhere to damage workpieces and cutters.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a cutting insert for finish machining, includes the cutting insert body, the cutting insert body is prismatic, including top surface, bottom surface, run through the top surface with the hole of bottom surface, connect the top surface with a plurality of sides of bottom surface, the side is connected by a plurality of circular arc surfaces, the top surface is crossing with the side forms the main cutting edge, the top surface with the circular arc surface is crossing to form the knife tip, and the main cutting edge is earlier with the horizontal direction to the bottom surface extension of certain contained angle, then to the top surface direction extends until the top surface, the knife tip is earlier towards the internal hole direction to the bottom surface extension form the rake face, then to the top surface direction extension until the top surface forms the bellying for bellying, knife tip, rake face, main cutting edge and top surface form oversized chip pocket.

The blade main cutting edge extends to the bottom surface and forms a certain contained angle with the horizontal direction, and the contained angle of main cutting edge and horizontal direction, the blade will be sharper, because the blade is sharper, the heat that produces when the blade cuts the work piece reduces, and the blade also can reduce the production of long-pending bits tumor simultaneously, and simultaneously, the deformation of smear metal is also influenced to the sharpness degree of blade, and the blade is sharper, and the smear metal deformation is littleer, and this is favorable to the stable shaping of smear metal, avoids thin smear metal to splash and hurts work piece and blade, bellying and knife tip, front blade, main cutting edge, upper surface formation super-large chip pocket.

Further, the included angle α between the main cutting edge and the horizontal direction satisfies: alpha is more than or equal to 10 degrees and less than or equal to 15 degrees, the blade is sharper, and because the blade is sharper, the heat generated by the blade when cutting a workpiece is reduced, and the blade can also reduce the generation of built-up bits. Meanwhile, the sharpness of the blade also affects the deformation of the cutting chips, and the sharper the blade is, the smaller the deformation of the cutting chips is, so that the stable forming of the cutting chips is facilitated, and the thin cutting chips are prevented from splashing to hurt the workpiece and the blade.

Further, the shape of the boss is a convex arc, and the radius r of the arc satisfies: and r is more than or equal to 2mm and less than or equal to 3mm, the convex part forms a smooth curved surface shape, and when the cutting blade cuts a workpiece, the chip is bent and curled at the convex part of the smooth curved surface, so that the chip is not broken prematurely.

Further, the distance h from the tip arc to the boss satisfies: the length of the discharged chips is increased, the chips can be naturally broken finally, and the thin long chips are discharged.

Furthermore, the side surface and the bottom surface reach the grinding grade through the grinding process, the blade, the periphery and the bottom surface are of the grinding grade, a stable clamping structure is formed, cutting is more stable, and the machining precision and the surface finish of the workpiece can be stably ensured when the workpiece is machined. The blade grinding stage means that after the blade is produced, the roughness and flatness of the bottom surface and the side surfaces around are poor, the phenomenon of uneven can be presented, and the bottom surface and the side surfaces around of the blade are required to be ground through a fine grinding wheel, so that the bottom surface and the side surfaces around of the blade have very good smoothness and flatness, the blade is positioned through the bottom surface and the side surfaces around, and therefore the blade can be very stable after being ground.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the main cutting edge of the blade extends to the bottom surface to form a certain included angle with the horizontal direction, the included angle between the main cutting edge and the horizontal direction is formed, the blade is sharper, the heat generated by the blade during cutting of a workpiece is reduced, the blade can reduce the generation of built-up chip, meanwhile, the sharpness of the blade also influences the deformation of chips, the sharper the blade is, the smaller the chip deformation is, the stable forming of chips is facilitated, and the phenomenon that the thin chips splash to hurt the workpiece and the blade, the bulge part, the knife tip, the front blade, the main cutting edge and the upper surface form an oversized chip pocket is avoided.

2. Through the flute profile of chip flute, the flute profile has super large chip space, and the blade flows from the main cutting edge when cutting the work piece, rolls up in the super large chip space of blade, and along with the length increase of flowing chip, the chip can finally naturally fracture, forms thin long chip and discharges, and the bellying forms smooth curved surface shape, and when cutting the work piece was cut to the cutting blade, the chip was crooked and curled in smooth curved surface bellying department, makes the chip not fracture prematurely.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic top view of the present utility model;

FIG. 3 is another angular schematic view of the present utility model;

fig. 4 is an enlarged partial schematic view of the present utility model at B.

In the figure: 1. a top surface; 2. a bottom surface; 3. an inner bore; 4. a side surface; 5. an arc surface; 6. a main cutting edge; 7. a knife tip; 8. a rake face; 9. a boss; 10. chip flutes.

Detailed Description

Referring to fig. 1-4, an embodiment of the present utility model is provided: the utility model provides a cutting blade for smart processing, includes the cutting blade body, the cutting blade body is prismatic, including top surface 1, bottom surface 2, run through top surface 1 with the hole 3 of bottom surface 2, connection top surface 1 with a plurality of sides 4 of bottom surface 2, side 4 are connected by a plurality of arc surfaces 5, top surface 1 and the crossing of side 4 form main cutting edge 6, top surface 1 with the arc surface 5 is crossing to form knife tip 7, and main cutting edge 6 is first to be certain contained angle with the horizontal direction and extends to bottom surface 2, then extends to top surface 1 direction until top surface 1, knife tip 7 is first to the bottom surface 2 towards the hole 3 direction extend and form rake face 8, then to top surface 1 direction extend until top surface 1 forms bellying 9 for bellying 9, knife tip 7, rake face 8, main cutting edge 6 and top surface 1 form super-large chip flute 10, and knife blade 6 is to be certain contained angle with the horizontal direction extension, and main cutting edge 6 and the contained angle of horizontal direction, and the knife blade will be sharper because of sharpness, and the heat that the knife blade produced when cutting the work piece, the heat that the knife blade produced reduces simultaneously reduces to the work piece, and the chip forming the chip contour is also is little to the chip contour, and the chip contour is reduced to the chip contour, and the chip contour is more sharp, and the chip is more sharp, the chip is more sharp and the chip surface is more difficult to be deformed, and the chip contour and the chip is more than the chip contour.

In actual use, the included angle α between the main cutting edge 6 and the horizontal direction satisfies: alpha is more than or equal to 10 degrees and less than or equal to 15 degrees, the blade is sharper, and because the blade is sharper, the heat generated by the blade when cutting a workpiece is reduced, and the blade can also reduce the generation of built-up bits. Meanwhile, the sharpness of the blade also affects the deformation of the chip, the sharper the blade is, the smaller the deformation of the chip is, the stable forming of the chip is facilitated, the thin chip is prevented from splashing to hurt the workpiece and the blade, the shape of the protruding part 9 is a protruding circular arc, and the radius r of the circular arc meets the following conditions: the r is more than or equal to 2mm and less than or equal to 3mm, the bulge 9 forms a smooth curved surface shape, and when the cutting blade cuts a workpiece, the chip is bent and curled at the smooth curved surface bulge 9, so that the chip is not broken prematurely.

In addition, the distance h from the arc of the tip 7 to the boss 9 satisfies: the length of the flowing chips is increased, the chips are naturally broken finally to form thin long chips to be discharged, the side surface 4 and the bottom surface 2 reach the grinding grade through the grinding process, the blades are of a grinding grade, a stable clamping structure is formed, the cutting is more stable, and the processing precision and the surface finish of the workpiece can be stably ensured when the workpiece is processed.

Claims (5)

1. The utility model provides a cutting insert for finish machining, includes the cutting insert body, the cutting insert body is prismatic, including top surface, bottom surface, run through the top surface with the hole of bottom surface, connect the top surface with a plurality of sides of bottom surface, the side is connected by a plurality of circular arc surfaces, the top surface forms the main cutting edge with the side intersection, the top surface with the circular arc surface intersection forms the knife tip, its characterized in that: the main cutting edge is extended to the bottom surface at a certain included angle with the horizontal direction, then extends to the top surface direction until reaching the top surface, the tool nose is extended to the bottom surface at first towards the inner hole direction to form a front tool face, and then extends to the top surface direction until reaching the top surface to form a protruding part, so that the protruding part, the tool nose, the front tool face, the main cutting edge and the top surface form an oversized chip pocket.

2. A cutting insert for finishing as claimed in claim 1, wherein: the included angle alpha between the main cutting edge and the horizontal direction meets the following conditions: alpha is more than or equal to 10 degrees and less than or equal to 15 degrees.

3. A cutting insert for finishing as claimed in claim 1, wherein: the shape of the protruding part is a protruding arc, and the radius r of the arc meets the following conditions: r is more than or equal to 2mm and less than or equal to 3mm.

4. A cutting insert for finishing as claimed in claim 1, wherein: the distance h from the cutter point arc to the protruding part meets the following conditions: h is more than or equal to 3mm and less than or equal to 4mm.

5. A cutting insert for finishing as claimed in claim 1, wherein: the side surfaces and the bottom surfaces reach the grinding grade through a grinding process.