Turning blade for medium machining
By designing a combination structure of cutting surface, guide boss and chip breaker on the turning insert, the problems of poor chip curling and chip breaking in medium machining processes are solved, and stable and efficient chip removal in the cutting process is achieved.
Patent Information
- Application Number
- CN202423158011.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Medium-grade turning inserts are prone to problems with chip curling and poor chip breaking during the cutting process.
A combined structure of cutting surface, guide boss, chip breaker and through groove was designed. The guide boss is located at the inner corner of the cutting surface. The chip breaker is long and narrow and aligned with the inner corner of the cutting surface. The through groove is connected to the guide boss by a rounded transition. The chip breaker is set in the chip groove for rapid chip breaking and discharge of iron chips through the through groove.
It effectively solves the problems of poor chip curling and chip breaking during medium-sized machining processes, ensuring stable cutting processes, and enabling chips to be quickly curled up and broken, and discharged smoothly.
Smart Images
Figure CN223531432U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of turning tool technology, and in particular to a turning insert for medium-duty machining. Background Technology
[0002] A lathe tool is a cutting tool with a cutting section used in CNC turning. It is one of the most widely used tools in CNC milling. It is applicable to steel, stainless steel, and cast iron, offering high versatility and a simple, reliable structure. The working part of a lathe tool is responsible for generating and handling chips, including the cutting edge, the structure for breaking or curling chips, the space for chip removal or storage, and the channel for cutting fluid. The cutting insert refers to the structure primarily used to fix itself to the lathe tool and perform the actual cutting; that is, the working part of the lathe tool.
[0003] Medium-level machining refers to machining processes that require a certain level of surface quality and dimensional accuracy, but not the absolute most stringent requirements—that is, machining between roughing and finishing. In this machining state, the workpiece material is typically neither extremely hard nor extremely soft, but rather falls within an intermediate hardness range, such as certain types of stainless steel, cast iron, or non-ferrous metals. During machining, cutting parameters such as speed, feed rate, and depth of cut are set at appropriate levels to ensure effective material removal while maintaining good surface finish and machining accuracy.
[0004] As mentioned above, since the workpiece material is usually neither very hard nor extremely soft, and the cutting parameters such as speed, feed rate and depth of cut are set at a moderate level, it is very easy to produce linear chips, that is, it cannot effectively achieve chip curling and chip breaking. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a medium-scale turning insert that solves the technical problem that existing medium-scale turning inserts are prone to chip curling and chip breaking.
[0006] According to an embodiment of the present invention, a medium-machining turning insert is provided, wherein the top and bottom of the turning insert are both provided as cutting surfaces, the edges of the cutting surfaces are surrounded by cutting edges, and the cutting surfaces are provided with through grooves on the inner side of the cutting edges.
[0007] The cutting surface is polygonal, and a guide boss is provided at the corresponding inner corner of the cutting surface. The guide boss is located inside the through groove, and the through groove and the guide boss are connected by a circular arc transition. The surface of the guide boss is the lower positioning surface.
[0008] A chip breaker is provided between the guide boss and the inner corner of the cutting surface. The chip breaker is elongated and its two ends are respectively aligned with the inner corner of the cutting surface and the guide boss.
[0009] The technical principle of this utility model is as follows: the positioning surface of one side of the turning insert is closely attached to the tool, and then the turning insert is fixed to ensure that the connection between the turning insert and the tool is stable and that it is not easy to shake during cutting. During cutting, the cutting edge cuts off the iron chip at the inner corner near the cutting surface. The iron chip enters the through groove to complete the chip rolling. At the same time, because of the existence of the long strip-shaped chip breaking platform, the chip can be broken quickly and then quickly discharged through the through groove.
[0010] The guide boss is used to force chip removal in cases of large cutting depths.
[0011] Compared with the prior art, this utility model has the following advantages: by aligning the elongated chip breaker with the inner corner of the cutting surface and fitting the through groove, it solves the technical problem that existing medium-sized turning inserts are prone to chip curling and chip breaking.
[0012] Furthermore, the chip breaker is teardrop-shaped, and its width gradually increases from one end to the other, with the wider end of the chip breaker closely attached to the guide boss.
[0013] Furthermore, the horizontal height of the chip breaker gradually increases from the narrow end to the wide end, and the highest point of the chip breaker is flush with the lower positioning surface of the guide boss.
[0014] Furthermore, the lowest point of the chip breaker's horizontal height is lower than the horizontal height of the cutting edge.
[0015] Furthermore, a gap is left between the chip breaker and the cutting edge.
[0016] Furthermore, the guide boss has a chip-rolling protrusion on the inner corner side of the cutting surface, and a chip-rolling groove is provided between the chip-rolling protrusion and the cutting edge located at the inner corner of the cutting surface. The chip-breaking platform is disposed in the chip-rolling groove.
[0017] Furthermore, both the chip protrusion and the chip groove transition into the through groove with an arc.
[0018] Furthermore, the cutting surface is quadrilateral, and the chip breaker is positioned between the inner corner of the cutting surface (less than or equal to 90°) and the guide boss.
[0019] Furthermore, the horizontal height of the lower positioning surface is higher than the horizontal height of the cutting surface.
[0020] Furthermore, the turning insert has a through screw hole in the middle, and all the guide bosses can form an axisymmetric figure. Attached Figure Description
[0021] Figure 1 This is a perspective view of a turning insert for medium-level machining according to an embodiment of the present invention.
[0022] Figure 2 This is a side view of a turning insert for medium-scale machining according to an embodiment of the present invention.
[0023] Figure 3 This is a top view of a turning insert for medium-scale machining according to an embodiment of the present invention.
[0024] Figure 4 This is a cross-sectional view of the chip-breaking stage according to an embodiment of the present invention.
[0025] In the above figures: 10, cutting surface; 11, cutting edge; 20, through groove; 21, chip groove; 30, guide boss; 31, lower positioning surface; 32, chip protrusion; 40, chip breaker; 41, clearance; 50, screw hole. Detailed Implementation
[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0027] like Figure 1-3 The turning insert shown has a medium-sized machining tool. Both the top and bottom of the cutting insert are provided with cutting surfaces 10. The edges of the cutting surfaces 10 are surrounded by cutting edges 11. The cutting surfaces 10 are provided with through grooves 20 inside the cutting edges 11.
[0028] Specifically, the cutting surface 10 is quadrilateral. In this embodiment, a parallelogram is used as an example. A guide boss 30 is integrally formed at the corresponding inner corner of the cutting surface 10. The guide boss 30 is located inside the through groove 20, and the through groove 20 and the guide boss 30 are connected by a rounded transition to facilitate chip removal during deep cutting. The surface of the guide boss 30 is a lower positioning surface 31, which is used to fix the tool.
[0029] like Figure 3-4 As shown, a chip breaker 40 is integrally formed between the guide boss 30 and the inner corner of the cutting surface 10. The chip breaker 40 is elongated and also teardrop-shaped. The two ends of the chip breaker 40 are aligned with the inner corner of the cutting surface 10 and the guide boss 30, respectively. Specifically, the width of the chip breaker 40 gradually increases from one end to the other. The wider end of the chip breaker 40 is close to the guide boss 30. A gap 41 is left between the chip breaker 40 and the cutting edge 11. The horizontal height of the chip breaker 40 gradually increases from the narrow end to the wide end. The highest point of the chip breaker 40 is flush with the lower positioning surface 31 of the guide boss 30. The lowest point of the chip breaker 40 is lower than the horizontal height of the cutting edge 11, forming a chip breaker 40 that gradually increases in height and width, which can gradually break the chips.
[0030] like Figure 1-2 As shown, the guide boss 30 is integrally formed with a chip-rolling protrusion 32 on one side of the inner corner of the cutting surface 10. A chip-rolling groove 21 is provided between the chip-rolling protrusion 32 and the cutting edge 11 located at the inner corner of the cutting surface 10 to guide the chips. The chip-breaking platform 40 is set in the chip-rolling groove 21 to break the chips.
[0031] Specifically, both the chip protrusion 32 and the chip groove 21 are rounded into the through groove 20, so that the broken iron chips can quickly enter the through groove 20 and be discharged along the through groove 20, thus completing the chip removal.
[0032] like Figure 1-2 As shown, the chip breaker 40 is located between the inner corner of the cutting surface 10 (less than or equal to 90°) and the guide boss 30. The chip breaker 40 is not located at the inner corner of the cutting surface 10 (greater than 90°) because the inner corner of the cutting surface 10 (greater than 90°) is not suitable for medium-sized machining, so the chip breaker 40 is not provided.
[0033] like Figure 3 As shown, the horizontal height of the lower positioning surface 31 is higher than the horizontal height of the cutting surface 10, ensuring that when the insert is installed on the tool, the cutting surface 10 will not interfere with the tool, thereby damaging the cutting edge 11.
[0034] like Figure 1-3 As shown, the turning insert has a through screw hole 50 in the middle for fixing to the tool with screws. All guide bosses 30 can form an axisymmetric figure to ensure that the lower positioning surface 31 is evenly distributed and to ensure the stability of the tool fixing structure.
[0035] 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 turning insert for medium machining operations, characterized in that: The top and bottom of the turning insert are both provided as cutting surfaces, the edges of the cutting surfaces are surrounded by cutting edges, and the cutting surfaces are provided with through grooves on the inner side of the cutting edges. The cutting surface is polygonal, and a guide boss is provided at the corresponding inner corner of the cutting surface. The guide boss is located inside the through groove, and the through groove and the guide boss are connected by a circular arc transition. The surface of the guide boss is the lower positioning surface. A chip breaker is provided between the guide boss and the inner corner of the cutting surface. The chip breaker is elongated and its two ends are respectively aligned with the inner corner of the cutting surface and the guide boss.
2. The turning insert for medium machining as described in claim 1, characterized in that: The chip breaker is teardrop-shaped, and its width gradually increases from one end to the other. The wider end of the chip breaker is in close contact with the guide boss.
3. A medium-machining turning insert as described in claim 2, characterized in that: The horizontal height of the chip breaking platform gradually increases from the narrow end to the wide end, and the highest point of the chip breaking platform is flush with the lower positioning surface of the guide boss.
4. A medium-machining turning insert as described in claim 3, characterized in that: The lowest point of the chip breaker's horizontal height is lower than the horizontal height of the cutting edge.
5. A medium-machining turning insert as described in any one of claims 1-4, characterized in that: A gap is left between the chip breaker and the cutting edge.
6. A medium-machining turning insert as described in any one of claims 1-4, characterized in that: The guide boss has a chip-rolling protrusion on the inner corner side of the cutting surface, and a chip-rolling groove is provided between the chip-rolling protrusion and the cutting edge located at the inner corner of the cutting surface. The chip-breaking platform is set in the chip-rolling groove.
7. A medium-machining turning insert as described in claim 6, characterized in that: Both the chip protrusion and the chip groove transition into the through groove with an arc.
8. A medium-machining turning insert as described in claim 1, characterized in that: The cutting surface is quadrilateral, and the chip breaker is located between the inner corner of the cutting surface (less than or equal to 90°) and the guide boss.
9. A medium-machining turning insert as described in claim 1, characterized in that: The horizontal height of the lower positioning surface is higher than the horizontal height of the cutting surface.
10. A medium-machining turning insert as described in claim 1, characterized in that: The turning insert has a through screw hole in the middle, and all the guide bosses can form an axisymmetric figure.