Turning blade with wedge-shaped chip breaking structure

Abstract

The invention provides a turning blade with a wedge-shaped chip breaking structure, and belongs to the technical field of metal cutting machining. The turning blade solves the problem that an existing turning blade is small in application range. The turning blade with the wedge-shaped chip breaking structure comprises an upper surface, a lower surface and a plurality of side faces formed between the upper surface and the lower surface, a cutting part is formed between every two adjacent side faces, and two wedge-shaped strips used for cutting tool chip breaking are arranged at the matched position of the upper surface and each cutting part. A chip breaking table and a chip breaking protrusion are arranged between the two wedge-shaped strips, the chip breaking table is located on the side, away from the cutting part, of the chip breaking protrusion, and chip breaking grooves are formed among the chip breaking table, the chip breaking protrusion and the two wedge-shaped strips. The method has the advantage of being wide in application range.

Description

Technical Field

[0001] The invention belongs to the technical field of metal cutting and processing, and relates to a processing tool with an asymmetric wedge-shaped chip breaking structure. Background Art

[0002] With the development of science and technology, more and more metal materials are used in production and processing. Most of the metal materials are turned by machine tools to achieve the appropriate shape and size.

[0003] In the turning process of metal materials, the turning blade discharges the excess waste on the material through the chip breaker groove. The general structure of the turning blade currently on the market is: the chip breaker groove is formed by a depression at the cutting rear end of the turning blade, and the arc surface of the chip breaker groove is used to guide the waste chips and guide them to curl and discharge. The main disadvantages are: small application range, unable to cope with complex cutting environment, poor impact resistance when the workpiece needs to be cut with a large feed rate, poor chip control ability at a small cutting depth, and unable to achieve a balance between large feed cutting and small cutting depth cutting. Summary of the invention

[0004] The object of the present invention is to provide a turning insert with a wedge-shaped chip breaking structure which has a wide application range, good chip control ability at small cutting depth, and excellent impact resistance at large cutting depth in view of the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A turning insert with a wedge-shaped chip breaking structure comprises an upper surface, a lower surface and a plurality of side surfaces formed between the upper surface and the lower surface, a cutting portion being formed between two adjacent side surfaces, and is characterized in that two wedge-shaped strips for tool chip breaking are arranged at the position where the upper surface cooperates with each cutting portion, a chip breaking platform and a chip breaking protrusion are arranged between the two wedge strips, the chip breaking platform is located on the side of the chip breaking protrusion away from the cutting portion, and a chip breaking groove is formed between the chip breaking platform, the chip breaking protrusion and the two wedge strips.

[0006] In the above-mentioned turning blade with a wedge-shaped chip breaking structure, each of the wedge-shaped strips includes a front end portion and a rear end portion, the front end portion faces one side of the cutting portion, the rear end portion faces away from the cutting portion, the width of the rear end portion is greater than the width of the front end portion, and the height of the rear end portion is higher than the height of the front end portion.

[0007] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, the rear end of each wedge-shaped strip is close to the side of the cutting portion angle bisector L, and the front end of the wedge-shaped strip is away from the side of the cutting portion angle bisector L.

[0008] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, there is a distance D1 between the end of each wedge-shaped strip closest to the cutting portion and the bisector L of the cutting portion.

[0009] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, a shortest straight-line distance D2 is formed between the end of each wedge-shaped strip closest to the cutting portion and the cutting portion.

[0010] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, the chip breaking protrusion is arranged in an arc shape as a whole, the top of the chip breaking protrusion is lower than the edge of the cutting part, and there is a height difference H between the two.

[0011] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, there is a distance D3 between the top of the chip breaking protrusion and the edge of the cutting portion.

[0012] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, the two sides of the chip breaking platform are respectively connected to the side portions of the corresponding wedge-shaped strips, and the chip breaking platform has a guide surface inclined toward one side of the chip breaking protrusion.

[0013] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, a positioning surface is provided at the place where the upper surface cooperates with each cutting portion, and the positioning surface is located at the rear side of the wedge-shaped strip.

[0014] In the above-mentioned turning insert with a wedge-shaped chip breaking structure, the lower surface 2 has the same structure as the upper surface.

[0015] Compared with the existing technology, the advantages of the present invention are: there are two wedge-shaped strips, a chip breaking platform and a chip breaking protrusion on the upper surface of the turning blade, and a three-dimensional chip space is formed between the three. In small feed processing, thin and long chips can be quickly bent and broken into chips of appropriate length. When the cutting depth is greater than the range of the chip breaking protrusion, the chips generated by the cutting are effectively lifted when they contact the chip breaking protrusion, and curling flow occurs and guides to the wedge strip in the side edge, and then are bent again by the wedge strip, and finally effectively controlled. When the blade cuts soft steel, the overall chip space is sufficient, so that the chips are curled more fully, thereby controlling the chips to break into fragments of appropriate length. The present turning blade has the advantage of a wide range of applications.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2It is a top view of the present invention.

[0019] Figure 3 yes Figure 2 Schematic diagram of the cross section of AA.

[0020] In the figure, 1, upper surface; 2, lower surface; 3, side surface; 4, cutting part; 5, wedge-shaped strip; 6, chip breaker platform; 7, chip breaking protrusion; 8, chip breaker groove; 9, front end; 10, rear end; 11, positioning surface. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 3 As shown, a turning insert with a wedge-shaped chip breaking structure comprises an upper surface 1, a lower surface 2 and a plurality of side surfaces 3 formed between the upper surface 1 and the lower surface 2, a cutting portion 4 is formed between two adjacent side surfaces 3, two wedge-shaped strips 5 for tool chip breaking are arranged at the position where the upper surface 1 cooperates with each cutting portion 4, a chip breaking platform 6 and a chip breaking protrusion 7 are arranged between the two wedge strips 5, the chip breaking platform 6 is located on the side of the chip breaking protrusion 7 away from the cutting portion 4, and a chip breaking groove 8 is formed between the chip breaking platform 6, the chip breaking protrusion 7 and the two wedge strips 5.

[0023] In this embodiment, the upper surface 1 of the turning insert is provided with two wedge strips 5, a chip breaking platform 6 and a chip breaking protrusion 7, and a three-dimensional chip holding space is formed therebetween. The chip breaking protrusion 7 is used to meet the needs of materials of different hardness. In small feed processing, thin and long chips can be quickly bent and broken into chips of appropriate length to avoid chip entanglement and prevent the cutting edge from being damaged by chipping, while reducing the contact wear of the chips on the processed surface. When the cutting depth is greater than the range of the chip breaking protrusion 7, the chips generated by the cutting are effectively lifted when they contact the chip breaking protrusion 7, and curling flow occurs and is guided to the wedge strip 5 in the side edge, and then bent again by the wedge strip 5, and finally effectively controlled and broken and separated. When the insert cuts soft steel, the overall chip holding space is sufficient, so that the chips are curled more fully, thereby controlling the chips to break into fragments of appropriate length. The turning insert has the advantages of a wide range of applications, strong chip control ability and excellent impact resistance.

[0024] In this embodiment, specifically, the two wedge-shaped strips 5, the chip breaking platform 6 and the chip breaking protrusion 7 are symmetrically distributed along the angular bisector L of the cutting portion 4, the chip breaking platform 6 and the chip breaking protrusion 7 are distributed on the angular bisector L, and the two wedge-shaped strips 5 are respectively located on both sides of the angular bisector L, so that the formed chip breaking groove 8 is regularly symmetrical, which is convenient for accommodating chips.

[0025] In this embodiment, each wedge strip 5 includes a front end 9 and a rear end 10, the front end 9 faces the cutting portion 4, the rear end 10 faces away from the cutting portion 4, the width of the rear end 10 is greater than the width of the front end 9, the height of the rear end 10 is higher than the height of the front end 9, the rear end 10 of each wedge strip 5 is close to the cutting portion 4 angle bisector L side, the front end 9 of the wedge strip 5 is far away from the cutting portion 4 angle bisector L side, and the rear end 10 of each wedge strip 5 is close to the cutting portion 4 angle bisector L side, and the front end 9 of the wedge strip 5 is far away from the cutting portion 4 angle bisector L side. The wedge strip 5 adopts this structural design so that the turning blade can adapt to a wider feed range when processing with a small cutting depth. At the same time, the design of narrow front and wide back is conducive to improving the overall strength of the wedge strip 5.

[0026] Specifically, the distance D1 between the end of each wedge strip 5 closest to the cutting part 4 and the bisector L of the cutting part 4 is 0.6mm-1.5mm, and the shortest straight line distance D2 between the end of the wedge strip 5 closest to the cutting part 4 and the cutting part 4 is 0.1mm-0.6mm. It can meet the cutting feed of different scales and improve the application range of the turning blade. In order to achieve a good chip guiding effect, the chip breaking protrusion 7 is set in an arc shape as a whole. The top of the chip breaking protrusion 7 is lower than the edge of the cutting part 4, and the height difference H between the two is less than 0.07mm. The distance D3 between the top of the chip breaking protrusion 7 and the edge of the cutting part 4 is 0.6mm-1.3mm. The chip breaking protrusion 7 has the effect of chip rolling and chip removal, and also reduces the contact area between the waste chips and the blade surface, reduces the surface friction between the waste chips and the blade, and reduces the cutting temperature.

[0027] In this embodiment, the two sides of the chip breaker table 6 are respectively connected to the side portions of the corresponding wedge-shaped bars 5 to enhance the overall strength. At the same time, in order to enhance the chip guiding capability of the chip breaker table 6, the chip breaker table 6 has a guide surface inclined toward one side of the chip breaking protrusion 7. When waste chips contact the chip breaker table 6, they will curl upward along the guide surface.

[0028] In this embodiment, a positioning surface 11 is provided at the place where the upper surface 1 cooperates with each cutting portion 4. The positioning surface 11 is located on the rear side of the wedge strip 5. Compared with the positioning surface 11 of the traditional cutting blade, the positioning surface 11 in this embodiment is closer to the cutting edge, and the positioning surface 11 is large and can be clamped reliably, thus meeting the support strength requirements of the blade under rough machining conditions.

[0029] In this embodiment, the upper surface 1 and the lower surface 2 have exactly the same structure, that is, they are symmetrical structures. Both the upper surface 1 and the lower surface 2 can be used for cutting workpieces, thereby improving the utilization rate of the turning insert.

[0030] In addition to this embodiment, the number of the side surfaces 3 is at least three, so that the turning insert as a whole is a polygon such as a trihedron, a quadrilateral or a pentagon.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0032] Although the terms such as upper surface 1, lower surface 2, side surface 3, cutting portion 4, wedge strip 5, chip breaker 6, chip breaker projection 7, chip breaker groove 8, front end 9, rear end 10, and positioning surface 11 are often used in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention. It is contrary to the spirit of the present invention to interpret them as any additional limitation.

Claims

1. A turning insert with a wedge-shaped chip breaking structure, comprising an upper surface (1), a lower surface (2), and a plurality of side surfaces (3) formed between the upper surface (1) and the lower surface (2), wherein a cutting portion (4) is formed between two adjacent side surfaces (3), characterized in that: Two wedge-shaped strips (5) for tool chip breaking are arranged at the position where the upper surface (1) cooperates with each cutting portion (4); a chip breaking platform (6) and a chip breaking protrusion (7) are arranged between the two wedge-shaped strips (5); the chip breaking platform (6) is located on the side of the chip breaking protrusion (7) away from the cutting portion (4); and a chip breaking groove (8) is formed between the chip breaking platform (6), the chip breaking protrusion (7) and the two wedge-shaped strips (5).

2. A turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: Each of the wedge-shaped strips (5) comprises a front end portion (9) and a rear end portion (10), wherein the front end portion (9) faces the cutting portion (4) and the rear end portion (10) faces away from the cutting portion (4), the width of the rear end portion (10) is greater than the width of the front end portion (9), and the height of the rear end portion (10) is greater than the height of the front end portion (9).

3. A turning insert with a wedge-shaped chip breaking structure according to claim 2, characterized in that: The rear end portion (10) of each wedge-shaped strip (5) is close to one side of the angular bisector L of the cutting portion (4), and the front end portion (9) of the wedge-shaped strip (5) is away from one side of the angular bisector L of the cutting portion (4).

4. The turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: There is a distance D1 between the end of each wedge-shaped strip (5) closest to the cutting portion (4) and the angular bisector L of the cutting portion (4).

5. The turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: A shortest straight line distance D2 is formed between the end of each wedge-shaped strip (5) closest to the cutting portion (4) and the cutting portion (4).

6. The turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: The chip breaking protrusion (7) is arranged in an arc shape as a whole, and the top of the chip breaking protrusion (7) is lower than the edge of the cutting portion (4), and there is a height difference H between the two.

7. The turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: There is a distance D3 between the top of the chip breaking protrusion (7) and the edge of the cutting portion (4).

8. The turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: Both sides of the chip breaking platform (6) are respectively connected to the side portions of the corresponding wedge-shaped strips (5), and the chip breaking platform (6) has a guide surface inclined toward one side of the chip breaking protrusion (7).

9. The turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: A positioning surface (11) is provided at the position where the upper surface (1) cooperates with each cutting portion (4), and the positioning surface (11) is located at the rear side of the wedge-shaped strip (5).

10. The turning insert with a wedge-shaped chip breaking structure according to claim 1, characterized in that: The lower surface (2) has the same structure as the upper surface (1).

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