A cutting blade

Abstract

The present invention discloses a cutting blade, comprising a plate-shaped blade body, wherein the plate-shaped blade body is surrounded by an upper surface, a lower surface and side surfaces connecting the upper surface and the lower surface, wherein the side surfaces intersect with the upper surface to form a cutting edge, wherein the upper surface comprises a groove-shaped surface at the periphery and a central surface in the middle, wherein the groove-shaped surface comprises a cutting edge, a groove front surface, a groove bottom surface and a groove rear surface arranged in sequence from the outside to the inside, wherein at least one cross-type liquid guiding groove is provided on the groove-shaped surface, wherein the cross-type liquid guiding groove comprises a left-point groove and a right-point groove intersecting with each other, wherein the left-point groove and the right-point groove both extend to the cutting edge area and penetrate the cutting edge corresponding to the cutting edge, and in the direction from the periphery to the middle of the upper surface, the widths of the left-point groove and the right-point groove both first increase linearly and then maintain a stable size, and the present invention has the advantages of effectively controlling the chip flow direction, reducing the residual stress at the cutting edge, and having a long service life.

Description

Technical Field

[0001] The invention mainly relates to the field of metal cutting, and in particular to a cutting blade. Background Art

[0002] In the process of metal cutting, how to reduce tool material wear, reduce cutting friction, and improve tool wear resistance and service life are all research focuses. When the blade processes the workpiece at different cutting angles, the chip flow direction is complex and difficult to control, which affects the tool's chip removal ability and causes low blade processing accuracy. In addition, in the existing process of pressed blank sintering and blade surface coating, the blade is often in a tensile stress state, and the residual stress is mainly concentrated on the cutting edge, resulting in deformation of the blank edge after sintering and abnormal peeling of the blade after coating, causing abnormal wear of the blade during cutting, thereby affecting the tool's service life. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a cutting blade which can effectively control the chip flow direction, reduce the residual stress at the cutting edge and has a long service life.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A cutting blade comprises a plate-like blade body, which is surrounded by an upper surface, a lower surface and side surfaces connecting the upper surface and the lower surface, the side surfaces intersecting with the upper surface to form a cutting edge, the upper surface comprising a groove-shaped surface at the periphery and a central surface in the middle, the groove-shaped surface comprising a cutting band, a groove front surface, a groove bottom surface and a groove back surface arranged in sequence from the outside to the inside, one or more cross-type liquid guide grooves are provided on the groove-shaped surface, the cross-type liquid guide grooves comprise intersecting left-pointed grooves and right-pointed grooves, the left-pointed grooves and the right-pointed grooves both extend to the cutting band area and penetrate the cutting edge corresponding to the cutting band, and in the direction from the periphery to the middle of the upper surface, the widths of the left-pointed grooves and the right-pointed grooves both first increase linearly and then maintain a stable size.

[0006] As a further improvement of the above technical solution:

[0007] The cutting edge includes a plurality of main cutting edges and a plurality of corner cutting edges. The number of cross-type liquid guide grooves corresponding to any of the main cutting edges is N, which should satisfy: 2≤N≤6.

[0008] The groove depths of the left-point groove and the right-point groove on the main cutting edge are H1 and H2 respectively, and should satisfy:

[0009] The left pointed groove and the right pointed groove both extend to the center plane.

[0010] ​The included angles between the center lines of the left-pointed groove and the right-pointed groove and the main cutting edge are α1 and α2, respectively, and should satisfy the following conditions: 15°≤α1≤45°, 15°≤α2≤45°.

[0011] The angle between the center lines of the left pointed groove and the right pointed groove is β, which should satisfy: 90°≤β≤150°.

[0012] The distance between the front ends of the left pointed groove and the right pointed groove is smaller than the distance between the rear ends of the left pointed groove and the right pointed groove.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The cutting blade of the present invention has more than one cross-type liquid guiding groove on the groove surface, and the cross-type liquid guiding groove includes a left tip groove and a right tip groove that intersect each other. The left tip groove and the right tip groove both extend to the edge band area and penetrate the cutting edge corresponding to the edge band. From the outer periphery to the middle of the upper surface, the width of the left tip groove and the right tip groove first increases linearly and then maintains a stable size. The cross-type liquid guiding groove can be arranged to control different intersection angles to ensure that when the cutting blade cuts into the workpiece at different angles, the direction of the liquid guiding groove is always at the most suitable position relative to the cutting angle; at the same time, the cross-type liquid guiding groove can accommodate the coolant to the maximum extent, and can effectively reduce the gap between the tool groove and the chips. The friction of the left and right grooves is reduced, the surface temperature is reduced, and grooves are avoided during machining, thereby increasing the life of the cutting blade; the widths of the left and right grooves are first linearly increased and then maintained at a stable size, which can effectively control the flow direction of chips, improve the chip removal ability of the cutting blade, and improve the machining accuracy. The left and right grooves extend to the land area and penetrate the cutting edge corresponding to the land. The notch on the cutting edge can effectively reduce the release of residual stress at the cutting edge, reduce the deformation of the cutting edge caused by the blade in the sintering process, reduce the accumulation of coatings on the cutting edge, and reduce abnormal wear of the tool caused by abnormal peeling of the coating during blade cutting, thereby increasing the life of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the cutting blade of the present invention.

[0016] Figure 2 It is a top view of the cutting insert of the present invention.

[0017] Figure 3 It is a front view of the cutting insert of the present invention.

[0018] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0019] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0020] The symbols in the figure represent:

[0021] 1. Plate-shaped tool body; 2. Upper surface; 21. Groove surface; 211. Blade; 212. Front of groove; 213. Bottom of groove; 214. Back of groove; 22. Center surface; 3. Lower surface; 4. Side surface; 5. Cross-type liquid guide groove; 51. Left-pointed groove; 52. Right-pointed groove; 61. Main cutting edge; 62. Corner cutting edge. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of the present invention, it should be noted that terms such as "center", "up", "down", "horizontal", "inside", "outside", "top", and "bottom" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] Figures 1 to 5An embodiment of the cutting blade of the present invention is shown, the cutting blade of this embodiment includes a plate-shaped blade body 1, the plate-shaped blade body 1 is surrounded by an upper surface 2, a lower surface 4 and a side surface 4 connecting the upper surface 2 and the lower surface 3, the side surface 4 intersects with the upper surface 2 to form a cutting edge, the upper surface 2 includes a groove surface 21 on the periphery and a center surface 22 in the middle, the groove surface 21 includes a cutting band 211, a groove front surface 212, a groove bottom surface 213 and a groove rear surface 214 arranged in sequence from the outside to the inside, one or more cross-type liquid guide grooves 5 are provided on the groove surface 21, the cross-type liquid guide grooves 5 include a left tip groove 51 and a right tip groove 52 that intersect, the left tip groove 51 and the right tip groove 52 both extend to the cutting band 211 area and penetrate the cutting edge corresponding to the cutting band 211, in the direction from the periphery to the middle of the upper surface 2, the widths of the left tip groove 51 and the right tip groove 52 both increase linearly first and then maintain a stable size, and the cross-type liquid guide grooves 5 can be arranged by controlling different intersection angles It ensures that when the cutting blade cuts into the workpiece at different angles, the direction of the liquid guide groove is always in the most suitable position relative to the cutting angle; at the same time, the cross-type liquid guide groove 5 can accommodate the coolant to the maximum extent, which can effectively reduce the friction between the tool groove and the chips, reduce the surface temperature, and avoid the appearance of grooves in the tool groove during processing, thereby improving the life of the cutting blade; the widths of the left-pointed groove 51 and the right-pointed groove 52 are first linearly increased and then maintained at a stable size, which can effectively control the flow direction of the chips, improve the chip removal ability of the cutting blade, and improve the processing accuracy. The left-pointed groove 51 and the right-pointed groove 52 both extend to the blade band 211 area and pass through the cutting edge corresponding to the blade band 211. The notch set on the cutting edge can effectively reduce the release of residual stress at the cutting edge, reduce the deformation of the blade edge caused by the sintering process, reduce the accumulation of coating on the cutting edge, and reduce the abnormal wear of the tool caused by abnormal peeling of the coating during blade cutting, thereby improving the life of the blade.

[0025] The cutting edge includes a plurality of main cutting edges 61 and a plurality of corner cutting edges 62. The number of cross-type liquid guide grooves 5 corresponding to any main cutting edge 61 is N. In order to ensure the cooling effect and chip removal ability of the cutting blade without affecting the cutting performance of the main cutting edge 61, it should satisfy: 2≤N≤6. In this embodiment, N=3.

[0026] The groove depths of the left-point groove 51 and the right-point groove 52 on the main cutting edge 61 are H1 and H2 respectively. In order not to affect the cutting performance of the main cutting edge 61 and to effectively reduce the residual stress release at the cutting edge, the following conditions should be met:

[0027] In this embodiment, the left pointed groove 51 and the right pointed groove 52 both extend to the center plane 22 , thereby ensuring good chip removal performance of the cross-type liquid guiding groove 5 .

[0028] ​The included angles between the center lines of the left tip groove 51 and the right tip groove 52 and the main cutting edge 61 are α1 and α2 respectively. To ensure that the direction of the cross-type liquid guide groove is in the most suitable position relative to the blade cutting angle, the following conditions should be met: 15°≤α1≤45°, 15°≤α2≤45°. In this embodiment, α1=40°, α2=40°.

[0029] In this embodiment, the angle between the center lines of the left pointed groove 51 and the right pointed groove 52 is β. In order to better control the angles of the left pointed groove 51 and the right pointed groove 52, the following should be satisfied: 90°≤β≤150°. In this embodiment, β=100°.

[0030] In this embodiment, the distance between the front ends of the left pointed groove 51 and the right pointed groove 52 is smaller than the distance between the ends of the left pointed groove 51 and the right pointed groove 52, ensuring that more coolant is stored at the front end and the speed of the coolant can be increased at the end for more complete cooling.

[0031] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A cutting blade, comprising a plate-like blade body (1), the plate-like blade body (1) being surrounded by an upper surface (2), a lower surface (4) and a side surface (4) connecting the upper surface (2) and the lower surface (3), the side surface (4) intersecting with the upper surface (2) to form a cutting edge, the upper surface (2) comprising a peripheral groove surface (21) and a central surface (22) in the middle, the groove surface (21) comprising a cutting edge (211), a groove front surface (212), a groove bottom surface (213) and a groove rear surface (214) arranged in sequence from the outside to the inside, characterized in that: The grooved surface (21) is provided with at least one cross-shaped liquid guiding groove (5), the cross-shaped liquid guiding groove (5) comprising a left-pointed groove (51) and a right-pointed groove (52) intersecting each other, the left-pointed groove (51) and the right-pointed groove (52) both extending to the edge band (211) area and penetrating the cutting edge corresponding to the edge band (211), and in the direction from the periphery to the middle of the upper surface (2), the widths of the left-pointed groove (51) and the right-pointed groove (52) both first increase linearly and then maintain a stable size.

2. The cutting insert according to claim 1, characterized in that: The cutting edge comprises a plurality of main cutting edges (61) and a plurality of corner cutting edges (62), and the number of the cross-type liquid guide grooves (5) corresponding to any one of the main cutting edges (61) is N, which should satisfy: 2≤N≤6.

3. The cutting insert according to claim 2, characterized in that: The groove depths of the left-point groove (51) and the right-point groove (52) on the main cutting edge (61) are H1 and H2 respectively, and should satisfy the following: <H1≤1mm,0<H2≤1mm。 4. The cutting insert according to any one of claims 1 to 3, characterized in that: The left pointed groove (51) and the right pointed groove (52) both extend to the central plane (22).

5. The cutting insert according to claim 2 or 3, characterized in that: The included angles between the center lines of the left-pointed groove (51) and the right-pointed groove (52) and the main cutting edge (61) are α1 and α2, respectively, and should satisfy the following conditions: 15°≤α1≤45°, 15°≤α2≤45°.

6. The cutting insert according to any one of claims 1 to 3, characterized in that: The angle between the center lines of the left pointed groove (51) and the right pointed groove (52) is β, which should satisfy the following: 90°≤β≤150°.

7. The cutting insert according to any one of claims 1 to 3, characterized in that: The distance between the front ends of the left pointed groove (51) and the right pointed groove (52) is smaller than the distance between the rear ends of the left pointed groove (51) and the right pointed groove (52).

Images