A semi-finishing turning insert

Abstract

The utility model provides a kind of semi-finishing turning blade, including locating surface and the side surface being set around the locating surface, arc surface transition is equipped between the side surface;The intersection of arc surface and locating surface is arc cutting edge, the intersection of locating surface and side surface is main cutting edge, the arc cutting edge and main cutting are sequentially connected and set;All the main cutting edge is equipped with a section of inclined cutting edge near arc cutting edge, the inclined cutting edge gradually inclines from arc cutting edge to the side of locating surface setting side surface.

Description

Technical Field

[0001] This utility model relates to the field of turning technology, and in particular to a semi-finishing turning tool. Background Technology

[0002] With the continuous development of modern manufacturing, the requirements for automation and production efficiency in machining processes are increasing, especially in turning, where higher standards are being set for the performance of cutting tools. Among these, the chip-breaking ability and tool life of the inserts have become key factors affecting machining efficiency, machining quality, and production costs. Given that the types of materials being machined and the cutting conditions are basically the same, optimizing the insert structure design to achieve good chip-breaking performance and extend tool life has always been the core of tool development.

[0003] Currently, the mainstream cutting tools on the market can be divided into two categories: finishing tools and roughing tools. Finishing tools achieve high machining accuracy and surface finish by optimizing the cutting edge geometry and surface treatment process. However, their cutting edges are usually designed to be quite sharp, resulting in lower tip strength. Under high-load cutting conditions, they are prone to chipping or wear, thus shortening their service life. Roughing tools, on the other hand, improve tip strength by increasing the chamfer of the cutting edge and strengthening the base material. Although they have a longer service life and better impact resistance, their cutting edge has a higher degree of dulling, leading to increased cutting resistance and a significant decrease in machining accuracy and chip breaking effect. This contradiction between "sharpness and strength" makes it difficult for existing cutting tools to simultaneously meet the requirements of high-precision machining and long service life. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a semi-finishing turning insert that solves the technical problem of easy wear on the cutting edge of existing finishing inserts.

[0005] A semi-finishing turning insert according to an embodiment of the present invention includes a positioning surface and side surfaces surrounding the positioning surface, with an arc transition between the side surfaces; the intersection of the arc surface and the positioning surface is an arc cutting edge, and the intersection of the positioning surface and the side surfaces is a main cutting edge; the arc cutting edge and the main cutting edge are sequentially connected.

[0006] All of the main cutting edges are provided with an inclined cutting edge near the circular arc cutting edge, and the inclined cutting edge gradually tilts towards the side of the positioning surface from the circular arc cutting edge.

[0007] The technical principle of this utility model is as follows: after setting an inclined section of the main cutting edge, the inclined structure can reduce the cutting force on the main cutting edge during the cutting process.

[0008] At the same time, the inclined cutting edge structure also serves to avoid the finished workpiece, that is, there is a clearance structure, which makes it easier for chips to be discharged, and the discharge direction of chips is more reasonable, thus better protecting the workpiece.

[0009] Compared with the prior art, this utility model has the following beneficial effects: by using an inclined cutting edge combined with a circular arc cutting edge, it solves the technical problem that the cutting edge of existing finishing inserts is prone to wear, and effectively improves the service life of the entire turning insert.

[0010] Furthermore, the angle between the inclined cutting edge and the positioning surface is 4-8°.

[0011] Furthermore, the horizontal length of the inclined cutting edge is 2mm-3mm.

[0012] Since this application involves semi-finishing turning inserts, the conventional cutting length is within 2mm-3mm, and with a tilt angle of 4-8°, the overall strength of the turning insert will not be reduced.

[0013] Furthermore, the inner side of the arc-shaped cutting edge is provided with an arc-shaped groove and an arc-shaped chip guide in sequence, the inner side of the inclined cutting edge is provided with an inclined groove and an inclined chip guide in sequence, the inner side of the main cutting edge is provided with a main groove, the arc-shaped groove is connected to the inclined groove, the inclined groove is connected to the main groove, the arc-shaped chip guide and the inclined chip guide are arc-shaped transitions, and the inclined chip guide is arc-shaped transitions to the intersection of the main groove and the positioning surface.

[0014] The grooves and chip guides are designed to make the chips curl, which causes less wear on the grooves.

[0015] Furthermore, the main groove and the positioning surface are connected by a circular arc transition.

[0016] Furthermore, the arc cutting edge includes an arc cutting edge and an arc back face connected in sequence, and the arc back face is connected to the arc groove in an arc transition.

[0017] The main cutting edge includes a main cutting edge and a main flank face connected in sequence. The main flank face at the inclined cutting edge is connected to the inclined groove arc transition, and the main flank face at the remaining position is connected to the main groove arc transition.

[0018] Furthermore, the width of the arc-shaped cutting edge is equal to the width of the main cutting edge by 0.1mm-0.3mm, and the angle between the arc-shaped back cutting edge and the main back cutting edge and the positioning surface is equal by 10°-15°.

[0019] The tool belt structure is designed in conjunction with the angle between the back face and the positioning surface, so that the cutting edge can meet the requirements of semi-finishing and ensure a certain strength.

[0020] Furthermore, the width of the inclined groove is greater than the width of the circular arc groove, and both the circular arc chip guide and the main chip guide are convex circular arc structures. The radius of the circular arc chip guide is 0.2mm-0.3mm, and the radius of the main chip guide is 0.3-0.5mm.

[0021] The radius requirement of the arc-shaped chip guide table is to ensure that the chips are rolled smoothly, while the radius requirement of the main chip guide table is mainly to ensure that the rolled chips are broken smoothly.

[0022] Furthermore, a positioning surface is also provided at the bottom of the positioning surface, and the arc surface and the side surface are connected to the two positioning surfaces.

[0023] Furthermore, the two positioning surfaces are provided with threaded holes that penetrate the turning tool at their centers. Attached Figure Description

[0024] Figure 1 This is a perspective view of a semi-finishing turning tool according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the inclined cutting edge structure according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the circular arc cutting edge and the inclined cutting edge structure of an embodiment of the present utility model.

[0027] Figure 4 for Figure 3 A sectional view of AA.

[0028] Figure 5 for Figure 3 A cross-sectional view of BB.

[0029] In the above figures: 1. Positioning surface; 101. Screw hole; 11. Arc groove; 12. Arc chip guide; 13. Inclined groove; 14. Inclined chip guide; 15. Main groove; 2. Side surface; 21. Main cutting edge; 211. Main tool belt; 212. Main flank face; 22. Inclined cutting edge; 3. Arc surface; 31. Arc cutting edge; 311. Arc tool belt; 312. Arc flank face. Detailed Implementation

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0031] like Figure 1The semi-finishing turning insert shown includes two positioning surfaces 1 and a side surface 2 surrounding the two positioning surfaces 1, wherein an arc surface 3 is provided between the side surfaces 2 for transition; the intersection of the arc surface 3 and the two positioning surfaces 1 is an arc cutting edge 31, and the intersection of the two positioning surfaces 1 and the side surface 2 is a main cutting edge 21. The arc cutting edge 31 and the main cutting edge are connected in sequence. The center of the two positioning surfaces 1 is provided with a threaded hole 101 that passes through the turning insert for mounting the turning insert on the tool holder.

[0032] like Figure 2-3 As shown, all main cutting edges 21 are provided with a section of inclined cutting edge 22 near the arc cutting edge 31. The inclined cutting edge 22 gradually tilts towards the side 2 of the positioning surface 1 from the arc cutting edge 31. Specifically, the inclination angle between the inclined cutting edge 22 and the positioning surface 1 is 4-8°. The horizontal length of the inclined cutting edge 22 is 2mm-3mm, and the 2mm-3mm is also the effective use area of ​​the semi-finishing turning insert.

[0033] like Figure 3-5 As shown, the inner side of the arc cutting edge 31 is provided with an arc groove 11 and an arc chip guide 12 in sequence. The inner side of the inclined cutting edge 22 is provided with an inclined groove 13 and an inclined chip guide 14 in sequence. The inner side of the main cutting edge 21 is provided with a main groove 15. The arc groove 11 is connected to the inclined groove 13, and the inclined groove 13 is connected to the main groove 15. The arc chip guide 12 and the inclined chip guide 14 are connected by an arc. The inclined chip guide 14 is connected by an arc to the intersection of the main groove 15 and the positioning surface 1. The intersection of the main groove 15 and the positioning surface 1 is connected by an arc, thereby ensuring that the chips can reach the main groove 15 along the arc groove 11 and the inclined groove 13, and finally the chips can be smoothly discharged from the main groove 15.

[0034] like Figure 3-5 As shown, the arc cutting edge 31 includes an arc cutting edge band 311 and an arc flank face 312 connected in sequence, with the arc flank face 312 and the arc groove 11 connected by an arc transition. The main cutting edge 21 includes a main cutting edge band 211 and a main flank face 212 connected in sequence, with the main flank face 212 at the inclined cutting edge 22 connected by an arc transition to the inclined groove 13, and the main flank face 212 at the remaining position connected by an arc transition to the main groove 15, ensuring that the chips can smoothly enter the arc groove 11 or the inclined groove 13 and finally be discharged from the main groove 15. The main cutting edge band 211 is connected by an arc transition at the junction of the inclined cutting edge 22 and the remaining main cutting edge 21.

[0035] Specifically, the width of the arc-shaped cutting edge 311 is equal to the width of the main cutting edge 211 by 0.1mm-0.3mm, and the angle between the arc-shaped flank face 312 and the main flank face 212 and the positioning surface 1 is equal to 10°-15°, which ensures the strength of the arc-shaped cutting edge 31 and the main cutting edge 21.

[0036] like Figure 3-5 As shown, the width of the inclined groove 13 is greater than the width of the circular arc groove 11. Both the circular arc chip guide table 12 and the main chip guide table are convex arc structures. The radius of the circular arc chip guide table 12 is 0.2mm-0.3mm, and the radius of the main chip guide table is 0.3-0.5mm, ensuring smooth chip rolling.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A semi-finishing turning tool, characterized in that: It includes a positioning surface and a side surface arranged around the positioning surface, with an arc transition between the side surfaces; the intersection of the arc surface and the positioning surface is an arc cutting edge, and the intersection of the positioning surface and the side surface is a main cutting edge, with the arc cutting edge and the main cutting edge connected in sequence. All of the main cutting edges are provided with an inclined cutting edge near the circular arc cutting edge, and the inclined cutting edge gradually tilts towards the side of the positioning surface from the circular arc cutting edge.

2. The semi-finishing turning tool as described in claim 1, characterized in that: The angle between the inclined cutting edge and the positioning surface is 4-8°.

3. A semi-finishing turning tool as described in claim 1 or 2, characterized in that: The horizontal length of the inclined cutting edge is 2mm-3mm.

4. A semi-finishing turning tool as described in claim 1, characterized in that: The inner side of the arc cutting edge is provided with an arc groove and an arc chip guide in sequence. The inner side of the inclined cutting edge is provided with an inclined groove and an inclined chip guide in sequence. The inner side of the main cutting edge is provided with a main groove. The arc groove is connected to the inclined groove. The inclined groove is connected to the main groove. The arc chip guide and the inclined chip guide are connected by an arc. The inclined chip guide is connected by an arc to the intersection of the main groove and the positioning surface.

5. A semi-finishing turning tool as described in claim 4, characterized in that: The main groove and the positioning surface are connected by a circular arc transition.

6. A semi-finishing turning tool as described in claim 4, characterized in that: The arc cutting edge includes an arc cutting edge and an arc back face connected in sequence, and the arc back face is connected to the arc groove in an arc transition. The main cutting edge includes a main cutting edge and a main flank face connected in sequence. The main flank face at the inclined cutting edge is connected to the inclined groove arc transition, and the main flank face at the remaining position is connected to the main groove arc transition.

7. A semi-finishing turning tool as described in claim 6, characterized in that: The width of the arc-shaped cutting edge is equal to the width of the main cutting edge by 0.1mm-0.3mm, and the angle between the arc-shaped back cutting edge and the main back cutting edge and the positioning surface is equal by 10°-15°.

8. A semi-finishing turning tool as described in claim 6, characterized in that: The width of the inclined groove is greater than the width of the circular arc groove. Both the circular arc chip guide and the main chip guide are convex circular arc structures. The radius of the circular arc chip guide is 0.2mm-0.3mm, and the radius of the main chip guide is 0.3-0.5mm.

9. A semi-finishing turning tool as described in claim 1, characterized in that: The bottom of the positioning surface is also provided with a positioning surface, and the arc surface and the side surface are connected to the two positioning surfaces.

10. A semi-finishing turning tool as described in claim 9, characterized in that: The two positioning surfaces are provided with threaded holes that penetrate the turning tool at their centers.

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