Indexable steel heavy turning insert
By setting chip control bumps on heavy-duty turning inserts, the problems of chip entanglement and random rolling are solved, achieving stable chip flow and tool protection, thus improving machining efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU GERUN HI TECH MATERIALS
- Filing Date
- 2025-03-05
- Publication Date
- 2026-04-14
AI Technical Summary
In heavy turning operations, chips are prone to entanglement and tangling, which can cause them to scratch the workpiece surface and damage the cutting tools.
Design a heavy-duty turning insert for indexable steel, which features mounting and positioning holes, chip breaker grooves, and cutting edges on the insert body, with chip control protrusions on these parts, especially the chip control protrusions in the middle of the chip breaker groove and the chip control protrusions in the transition section, to ensure that the chips spiral and curl laterally, avoiding entanglement.
It effectively prevents chip entanglement and tangling, ensures a stable chip flow, protects the cutting tool, and improves processing efficiency and quality.
Smart Images
Figure CN224115192U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of props, and in particular to a heavy-duty indexable steel turning insert and its groove structure. Background Technology
[0002] In heavy-duty turning, the workpiece is usually too large, resulting in a lower linear speed, but the depth of cut (AP) and feed rate are typically very high. Therefore, turning inserts need to have a large chip clearance to prevent chip evacuation and tool damage. These inserts are usually designed with a single-sided flute to accommodate these working conditions. In actual machining, for a large workpiece, during the peeling process, besides the large allowance and feed rate, there are certain areas where the machining allowance is relatively small, and the feed rate is also relatively reduced. In these areas, due to the rapid changes in machining parameters, the chip morphology also changes, and chip entanglement may even occur. Simultaneously, the large depth of cut and large feed rate quickly wear down the chip return bumps, causing the chips to become uncontrolled and scatter, potentially scratching the workpiece surface and damaging the tool. Therefore, to address these issues, a new insert flute design specifically for heavy-duty turning of steel materials is needed. Utility Model Content
[0003] The purpose of this invention is to provide an indexable heavy-duty turning insert for steel and its groove structure, which solves the problems of chip entanglement and random curling that easily occur during the peeling process of large workpieces.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] A heavy-duty indexable steel turning insert and its grooved structure are disclosed. The insert body has a mounting and positioning hole at its center. The two end faces of the insert body are a bottom mounting platform and a grooved surface, respectively. The grooved surface surrounds the mounting and positioning hole and includes a mounting and positioning hole transition connection, a chip breaker groove, and a cutting edge, arranged sequentially from the inside to the outside. The four corners of the mounting and positioning hole transition connection are provided with transition chip control protrusions. The chip breaker groove is provided with chip control protrusions evenly distributed in the center of each of its four sides. The chip control protrusions in the chip breaker groove are also provided with transition chip control protrusion mating protrusions on both sides of the chip control protrusions. The transition chip control protrusion mating protrusions are mated with the corresponding transition chip control protrusions. The transition chip control protrusion mating protrusions and the transition chip control protrusions are staggered in the horizontal axis direction, and there is a drop between their highest points.
[0006] In heavy-duty turning, the depth of cut Ap and feed rate Fr are usually large. However, there are often situations where the depth of cut Ap is ≤ 2mm. The presence of the chip control bump in the middle of the chip breaker groove can ensure that the chips are spirally curled and avoid chip entanglement. Then, the transition chip control bump and the transition chip control bump are staggered in the horizontal axis direction, which can more effectively achieve transverse chip curling. The staggered arrangement here means that the line connecting the centers of the two bumps is not parallel to the horizontal axis. At the same time, since there is a height difference between the highest points of the two bumps (the vertical distance between the transition chip control bump and the highest point of the cutting edge is larger than that between the transition chip control bump and the highest point of the cutting edge), it can effectively compensate for the defect of irregular chip curling caused by the wear of the transition chip control bump and the bump after long-term friction between the chips and the cutting tool.
[0007] As a further preferred embodiment of this utility model, the groove-shaped surface is composed of a circular arc surface with an arc R value between 8mm and 8.5mm.
[0008] As a further preferred embodiment of this utility model, the four corners of the chip breaking groove are also provided with chip breaking groove corner protrusions.
[0009] The presence of the chip breaker groove corner protrusions ensures stable chip flow without damaging other cutting edges. It also ensures that after the chips have been ground smooth by the chip control protrusions in the middle and transition sections of the chip breaker groove, the chips can still curl normally.
[0010] As a further preferred embodiment of this utility model, the highest point of the chip breaker groove corner protrusion is tangent to the plane of the chip control protrusion in the middle of the chip breaker groove, and the distance between the highest point of the chip breaker groove corner protrusion and the edge of the cutting edge is A2, where A2 is between 6mm and 6.5mm.
[0011] As a further preferred embodiment of this utility model, there is an angle between the center line connecting the chip control protrusion of the transition portion and the center line of the chip control protrusion mating protrusion of the transition portion and the horizontal projection of the horizontal longitudinal line, and the value of the angle is between 7° and 9°.
[0012] As a further preferred embodiment of this utility model, the vertical distance from the highest point of the chip control protrusion of the transition section to the highest point of the cutting edge is A4, where A4 is between 0.4mm and 0.5mm, and the vertical distance from the highest point of the chip control protrusion of the transition section to the edge of the cutting edge is A5, where A5 is between 1.35mm and 1.45mm.
[0013] As a further preferred embodiment of this utility model, the highest point of the chip control protrusion in the middle of the chip breaker groove is a small plane, and the vertical distance from this plane to the highest point of the cutting edge is A1, where A1 is between 0.3mm and 0.4mm.
[0014] As a further preferred embodiment of this utility model, the vertical distance from the highest point of the chip control protrusion of the transition portion to the highest point of the cutting edge is A3, where A3 is between 0.55mm and 0.65mm, and the vertical distance from the highest point of the chip control protrusion of the transition portion to the edge of the cutting edge is A6, where A6 is between 1.65mm and 1.75mm.
[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:
[0016] 1. In heavy-duty turning, the depth of cut Ap and feed rate Fr are usually large. However, there are often working conditions where the depth of cut Ap is ≤ 2mm. The presence of the chip control bump in the middle of the chip breaker groove can ensure that the chips are spirally curled and avoid chip entanglement. Then, the transition chip control bump and the transition chip control bump are staggered in the horizontal axis direction, which can more effectively achieve transverse chip curling. The staggered arrangement here means that the line connecting the centers of the two bumps is not parallel to the horizontal axis. At the same time, since there is a height difference between the highest points of the two bumps (the vertical distance between the transition chip control bump and the highest point of the cutting edge is larger than that between the transition chip control bump and the highest point of the cutting edge), it can effectively compensate for the defect of irregular chip curling caused by the wear of the transition chip control bump and the bump after long-term friction between the chips and the cutting tool.
[0017] 2. The presence of the chip breaker groove corner protrusions ensures stable chip flow and does not damage other cutting edges. At the same time, it ensures that after the chip breaker groove's central chip control protrusion, transition chip control protrusion, and chip control protrusion are ground flat, the chip can still curl normally. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the groove-shaped surface of this utility model.
[0019] Figure 2 for Figure 1 EE cross-sectional view.
[0020] Figure 3 for Figure 1 FF cross-section diagram.
[0021] Figure 4 for Figure 1 GG cross-sectional view.
[0022] Figure 5 This is a 3D drawing of the groove-shaped surface of this utility model.
[0023] Figure 6 for Figure 5 The main view. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0026] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the accompanying drawings.
[0029] The orientation or positional relationship, whether it refers to the orientation or positional relationship in which the product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art, is used only for the convenience of describing the present invention and for simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Specific Implementation Example 1
[0032] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A heavy-duty indexable steel turning insert and its groove structure are shown. The insert body 1 has a mounting hole 11 at its center. The two end faces of the insert body 1 are a bottom mounting platform 12 and a groove-shaped surface 13, respectively. The groove-shaped surface 13 surrounds the mounting hole 11 and includes, from the inside out, a transition connection 14, a chip breaker groove 15, and a cutting edge 16. The four corners of the transition connection 14 have transition chip control protrusions 2. The chip breaker groove 15 has uniformly distributed chip control protrusions 3 at the center of each of its four sides. On both sides of the locations of the chip control protrusions 3, transition chip control protrusion mating protrusions 4 are provided. The transition chip control protrusion mating protrusions 4 and corresponding transition chip control protrusions 2 are mated. The transition chip control protrusion mating protrusions 4 and transition chip control protrusions 2 are staggered along the horizontal axis, and there is a height difference between their highest points.
[0033] In heavy-duty turning, the depth of cut Ap and feed rate Fr are usually large. However, there are often situations where the depth of cut Ap is ≤ 2mm. The presence of the chip control bump in the middle of the chip breaker groove can ensure that the chips are spirally curled and avoid chip entanglement. Then, the transition chip control bump and the transition chip control bump are staggered in the horizontal axis direction, which can more effectively achieve transverse chip curling. The staggered arrangement here means that the line connecting the centers of the two bumps is not parallel to the horizontal axis. At the same time, since there is a height difference between the highest points of the two bumps (the vertical distance between the transition chip control bump and the highest point of the cutting edge is larger than that between the transition chip control bump and the highest point of the cutting edge), it can effectively compensate for the defect of irregular chip curling caused by the wear of the transition chip control bump and the bump after long-term friction between the chips and the cutting tool. Specific Implementation Example 2
[0035] This embodiment further describes the groove-shaped surface 13 based on specific embodiment 1. The groove-shaped surface 13 is composed of a circular arc surface with an arc R value between 8mm and 8.5mm. Specific Implementation Example 3
[0037] This embodiment further describes the chip breaking groove 15 based on specific embodiment 1. The chip breaking groove 15 is also provided with chip breaking groove corner protrusions 5 at its four corners.
[0038] The presence of the chip breaker groove corner protrusions ensures stable chip flow without damaging other cutting edges. It also ensures that after the chips have been ground smooth by the chip control protrusions in the middle and transition sections of the chip breaker groove, the chips can still curl normally. Specific Implementation Example 4
[0040] This embodiment further explains the chip breaker groove corner protrusion 5 based on specific embodiment 1. The highest point of the chip breaker groove corner protrusion 5 is tangent to the plane of the chip control protrusion 3 in the middle of the chip breaker groove. The distance between the highest point of the chip breaker groove corner protrusion 5 and the edge of the cutting edge 16 is A2, which is between 6mm and 6.5mm. Specific Implementation Example 5
[0042] This embodiment further describes the transition chip control protrusion 2 based on specific embodiment 1. There is an angle between the center line connecting the transition chip control protrusion 2 and the transition chip control protrusion mating protrusion 4 and the horizontal projection of the horizontal longitudinal line. The value of this angle is between 7° and 9°. Specific Implementation Example 6
[0044] This embodiment further describes the chip control protrusion 2 of the transition section based on specific embodiment 1. The vertical distance from the highest point of the chip control protrusion 2 of the transition section to the highest point of the cutting edge 16 is A4, and A4 is between 0.4mm and 0.5mm. The vertical distance from the highest point of the chip control protrusion 2 of the transition section to the edge of the cutting edge 16 is A5, and A5 is between 1.35mm and 1.45mm. Specific Implementation Example 7
[0046] This embodiment further describes the chip control protrusion 3 in the middle of the chip breaker groove based on specific embodiment 1. The highest point of the chip control protrusion 3 in the middle of the chip breaker groove is a small plane. The vertical distance from this plane to the highest point of the cutting edge 16 is A1, and A1 is between 0.3mm and 0.4mm. Specific Implementation Example 8
[0048] This embodiment further explains the chip control protrusion 4 in the transition section based on specific embodiment 1. The vertical distance from the highest point of the chip control protrusion 4 to the highest point of the cutting edge 16 is A3, which is between 0.55mm and 0.65mm. The vertical distance from the highest point of the chip control protrusion 4 to the edge of the cutting edge 16 is A6, which is between 1.65mm and 1.75mm.
[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A heavy-duty turning insert made of indexable steel, characterized in that: The device includes a blade body (1), with a mounting and positioning hole (11) at its center. The two end faces of the blade body (1) are a bottom mounting platform (12) and a groove-shaped surface (13), respectively. The groove-shaped surface (13) surrounds the mounting and positioning hole (11) and includes a mounting and positioning hole transition connection (14), a chip breaker groove (15), and a cutting edge (16) arranged sequentially from the inside to the outside. The four corners of the mounting positioning hole transition connection part (14) are provided with transition chip control protrusions (2). The chip breaking groove part (15) is provided with chip control protrusions (3) in the middle of the four sides. The chip breaking groove part (15) is provided with transition chip control protrusions (4) on both sides of the chip breaking groove part (15) where the chip control protrusions (3) are set. The transition chip control protrusions (4) are set with the corresponding transition chip control protrusions (2). The transition chip control protrusions (4) and the transition chip control protrusions (2) are staggered in the horizontal axis direction, and there is a drop between their highest points.
2. The indexable steel heavy-duty turning insert according to claim 1, characterized in that: The groove-shaped surface (13) is composed of a circular arc surface with an arc R value between 8 mm and 8.5 mm.
3. The indexable steel heavy-duty turning insert according to claim 1, characterized in that: The chip breaking groove (15) is also provided with chip breaking groove corner protrusions (5) at the four corners.
4. The indexable steel heavy-duty turning insert according to claim 3, characterized in that: The highest point of the chip breaker groove corner protrusion (5) is tangent to the plane of the chip control protrusion (3) in the middle of the chip breaker groove. The distance between the highest point of the chip breaker groove corner protrusion (5) and the edge of the cutting edge (16) is A2, and A2 is between 6mm and 6.5mm.
5. The indexable steel heavy-duty turning insert according to claim 1, characterized in that: There is an angle between the center line connecting the chip control protrusion (2) of the transition section and the matching protrusion (4) of the chip control protrusion of the transition section and the horizontal projection of the horizontal longitudinal line, and the value of the angle is between 7° and 9°.
6. The indexable heavy-duty turning insert for steel according to claim 1, characterized in that: The vertical distance from the highest point of the chip control protrusion (2) of the transition section to the highest point of the cutting edge (16) is A4, where A4 is between 0.4 mm and 0.5 mm. The vertical distance from the highest point of the chip control protrusion (2) of the transition section to the edge of the cutting edge (16) is A5, where A5 is between 1.35 mm and 1.45 mm.
7. The indexable steel heavy-duty turning insert according to claim 1, characterized in that: The highest point of the chip control protrusion (3) in the middle of the chip breaker groove is a small plane. The vertical distance from this plane to the highest point of the cutting edge (16) is A1, and A1 is between 0.3 mm and 0.4 mm.
8. The indexable steel heavy-duty turning insert according to claim 1, characterized in that: The vertical distance from the highest point of the chip control bump (4) to the highest point of the cutting edge (16) is A3, which is between 0.55mm and 0.65mm. The vertical distance from the highest point of the chip control bump (4) to the edge of the cutting edge (16) is A6, which is between 1.65mm and 1.75mm.