Indexable chambering blade and groove-shaped structure thereof
By designing a rhomboid insert body and a chip-breaking groove structure, the indexable reamer has solved the problems of low machining efficiency and poor workpiece surface quality of reamers. It achieves effective chip breaking and spiral curling, thereby improving machining efficiency and surface quality.
Patent Information
- Application Number
- CN202520476104.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Existing reaming tools have low processing efficiency and poor workpiece surface quality. Especially when the chip width is too wide or the feed rate is too small, the chips are prone to tangling and curling, resulting in poor processing.
Design an indexable reamer insert with a rhomboid insert body, featuring a mounting hole, base surface, chip return protrusion, and chip divider groove. The chip divider groove segments the chips or forces them to spirally curl, preventing the chips from tangling in a ribbon-like manner. The combination of double rake angle and chip divider groove is suitable for alloy steels containing a high amount of Cr and Ni.
It improves processing efficiency and workpiece surface quality, effectively addresses chip breakage and spiral curling during hole expansion machining of Cr and Ni alloy steel, avoids chip entanglement, and enhances workpiece surface quality.
Smart Images
Figure CN223862879U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of reaming inserts, and in particular to an indexable reaming insert and its groove structure. Background Technology
[0002] In reaming, the most undesirable problem is disorderly, coiled, and entangled chips. Such chips can scratch the machined surface of the workpiece and damage the cutting inserts or even the tool. Therefore, it is necessary to design a cutting insert groove specifically for reaming. Typically, the allowance for reaming inserts ranges from 0.5mm to 2mm. To ensure the required surface roughness, the feed per tooth is between 0.08mm / z and 0.15mm / z. Under these parameters, excessively wide chips, insufficient feed, or insufficient cutting allowance can prevent the chips from coiling properly, leading to low machining efficiency and poor workpiece surface quality. Therefore, a new type of reaming tool is needed. Utility Model Content
[0003] The purpose of this invention is to provide an indexable reaming insert and its groove structure to solve the problems of low processing efficiency and poor surface quality of the workpiece produced by existing reaming tools.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] An indexable reaming insert and its groove structure are disclosed. The insert includes a rhomboid insert body with a mounting and positioning hole in the middle. The acute-angled and obtuse-angled tips of the insert body are symmetrical about the center of the mounting and positioning hole. A base surface is provided around the mounting and positioning hole on the upper end face of the insert body. The base surface is connected to a chip-removing protrusion at the position opposite the tip. Chip-breaking grooves are uniformly provided in the middle of the cutting edge of the insert body. The area enclosed by the base surface, the chip-removing protrusion, and the cutting edge of the insert body is the groove section of the insert body.
[0006] When the feed per tooth Fz ≤ 0.08 mm / z and the allowance is greater than 1.5 mm, the chip divider can segment the chips, thereby reducing the toughness of the chips and breaking them. When the allowance AP ≤ 0.5 mm and the feed per tooth ≤ 0.08 mm / z, the chip spiral can be forced to curl, thus avoiding the occurrence of chip banding. This insert is versatile. When dealing with alloy steels containing more Cr and Ni elements, this insert can effectively deal with the phenomena of chip sticking and chip entanglement by combining double rake angle and chip divider.
[0007] As a further preferred embodiment of this utility model, the angle between the horizontal projection of the main cutting edge of the blade body and the horizontal projection of the horizontal plane is α, and its value is between 2° and 4°; the vertical distance between the lowest point of the main cutting edge of the blade body and the highest point of the blade tip of the blade body is H1, and its value is between 0.07mm and 0.09mm.
[0008] As a further preferred embodiment of this utility model, the R value of the chip-breaking groove is between 0.5mm and 0.7mm. The first chip-breaking groove near the tip of the insert body has a vertical distance B3 between its center and the intersection of the main cutting edge and the circular cutting edge of the tip, which is between 0.5mm and 0.7mm. The width of a single chip-breaking groove is B1, which is between 0.4mm and 0.6mm. Six chip-breaking grooves are evenly distributed on each main cutting edge, and the center-to-center distance between adjacent chip-breaking grooves is B2, which is between 0.8mm and 1mm.
[0009] As a further preferred embodiment of this utility model, the cutting edge plane of the blade body and the base plane form a certain angle b on the horizontal projection plane, the value of which is between 5° and 7°; the rake face of the blade body and the base plane form a certain angle c on the horizontal projection plane, the value of which is between 19° and 21°; the vertical distance between the lowest point of the groove structure between the chip-returning protrusion and the acute-angle tip of the blade body and the highest point of the acute-angle tip is H2, the value of which is between 0.04mm and 0.06mm; the vertical distance between the highest point of the chip-returning protrusion and the highest point of the acute-angle tip is 0mm; the vertical distance between the intersection of the chip-returning protrusion R and the chip-returning protrusion plane on the horizontal projection plane and the horizontal projection of the highest point of the acute-angle tip is B4, the value of which is between 0.5mm and 0.6mm.
[0010] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:
[0011] 1. When the feed per tooth Fz≤0.08mm / z and the allowance is greater than 1.5mm, the chips can be segmented by the chip divider groove of the product, thereby reducing the toughness of the chips and breaking them.
[0012] 2. When the allowance AP is ≤0.5mm and the feed per tooth is ≤0.08mm / z, the chip spiral can be forced to curl, thereby avoiding the occurrence of chip ribbon entanglement.
[0013] 3. This blade is versatile. When used with alloy steel containing a high amount of Cr and Ni, the blade effectively addresses the issues of chip sticking and tangling by combining a double rake angle with chip-splitting grooves. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure 2 for Figure 1 The main view.
[0016] Figure 3 for Figure 1 AA section diagram.
[0017] Figure 4 for Figure 3 Enlarged view of part C. Detailed Implementation
[0018] 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.
[0019] 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.
[0020] 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.
[0021] 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.
[0022] 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 orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] 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
[0024] Figure 1 , Figure 2 , Figure 3 , Figure 4 An indexable reaming insert and its groove structure are shown. The insert includes a rhomboid insert body 1 with a mounting and positioning hole 11 in the middle. The acute-angled tip 12 and the obtuse-angled tip 13 of the insert body 1 are symmetrical about the center of the mounting and positioning hole 11. The upper end face of the insert body 1 has a base surface 2 around the mounting and positioning hole. The base surface 2 is connected to the chip-removing protrusion 3 at the position opposite to the tip. The cutting edge 14 of the insert body 1 has chip-breaking grooves 4 evenly formed in the middle. The area enclosed by the base surface 2, the chip-removing protrusion 3 and the cutting edge 14 of the insert body 1 is the groove section 15 of the insert body.
[0025] When the feed per tooth Fz ≤ 0.08 mm / z and the allowance is greater than 1.5 mm, the chip divider can segment the chips, thereby reducing the toughness of the chips and breaking them. When the allowance AP ≤ 0.5 mm and the feed per tooth ≤ 0.08 mm / z, the chip spiral can be forced to curl, thus avoiding the occurrence of chip banding. This insert is versatile. When dealing with alloy steels containing more Cr and Ni elements, this insert can effectively deal with the phenomena of chip sticking and chip entanglement by combining double rake angle and chip divider. Specific Implementation
[0026] This embodiment further describes the blade body 1 based on specific embodiment 1. The angle between the horizontal projection of the main cutting edge of the blade body 1 and the horizontal projection of the horizontal plane is α, and its value is between 2° and 4°. The vertical distance between the lowest point of the main cutting edge of the blade body 1 and the highest point of the blade tip of the blade body 1 is H1, and its value is between 0.07mm and 0.09mm. Specific Implementation
[0027] This embodiment further describes the chip-breaking groove 4 based on specific embodiment 1. The R value of the chip-breaking groove 4 is between 0.5mm and 0.7mm. The first chip-breaking groove 4 near the tip of the insert body 1 has a vertical distance B3 between its center and the intersection of the main cutting edge and the tip arc cutting edge, which is between 0.5mm and 0.7mm. The width of a single chip-breaking groove 4 is B1, which is between 0.4mm and 0.6mm. Six chip-breaking grooves 4 are evenly distributed on each main cutting edge. The center-to-center distance between adjacent chip-breaking grooves 4 is B2, which is between 0.8mm and 1mm.
[0028] Specific implementation: 4:
[0029] This embodiment further describes the blade body 1 based on specific embodiment 1. The cutting edge plane of the blade body 1 forms a certain angle b with the projection of the base plane 2 onto the horizontal projection plane, with a value between 5° and 7°. The rake face of the blade body 1 forms a certain angle c with the projection of the base plane 2 onto the horizontal projection plane, with a value between 19° and 21°. The vertical distance between the lowest point of the groove structure between the chip-returning protrusion 3 and the acute-angled tip 12 of the blade body 1 and the highest point of the acute-angled tip 12 is H2, with a value between 0.04mm and 0.06mm. The vertical distance between the highest point of the chip-returning protrusion 3 and the highest point of the acute-angled tip 12 is 0mm. The vertical distance between the intersection of the chip-returning protrusion R and the chip-returning protrusion plane on the horizontal projection plane and the horizontal projection of the highest point of the acute-angled tip 12 is B4, with a value between 0.5mm and 0.6mm.
[0030] 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 repositionable reaming insert and its grooved structure, characterized in that: The blade body (1) is rhomboid in shape. A mounting and positioning hole (11) is provided in the middle of the blade body (1). The acute-angled cutting tip (12) and the obtuse-angled cutting tip (13) of the blade body (1) are symmetrical about the center of the mounting and positioning hole (11). A base surface (2) is provided around the mounting and positioning hole on the upper end face of the blade body (1). The base surface (2) is connected to the chip-returning protrusion (3) at the position opposite to the cutting tip. Chip-reducing grooves (4) are uniformly provided in the middle of the cutting edge (14) of the blade body (1). The part enclosed by the base surface (2), the chip-returning protrusion (3) and the cutting edge (14) of the blade body (1) is the groove-shaped part (15) of the blade body.
2. The indexable reaming insert and its groove structure according to claim 1, characterized in that: The angle between the horizontal projection of the main cutting edge of the blade body (1) and the horizontal projection of the horizontal plane is a, and its value is between 2° and 4°; the vertical distance between the lowest point of the main cutting edge of the blade body (1) and the highest point of the blade tip of the blade body (1) is H1, and its value is between 0.07mm and 0.09mm.
3. The indexable reaming insert and its groove structure according to claim 1, characterized in that: The R value of the chip-breaking groove (4) is between 0.5 mm and 0.7 mm. The first chip-breaking groove (4) near the tip of the insert body (1) has a vertical distance B3 between its center and the intersection of the main cutting edge and the tip arc cutting edge, which is between 0.5 mm and 0.7 mm. The width of a single chip-breaking groove (4) is B1, which is between 0.4 mm and 0.6 mm. Six chip-breaking grooves (4) are evenly distributed on each main cutting edge. The center-to-center distance between adjacent chip-breaking grooves (4) is B2, which is between 0.8 mm and 1 mm.
4. The indexable reaming insert and its groove structure according to claim 1, characterized in that: The cutting edge plane of the blade body (1) and the base plane (2) on the horizontal projection plane form a certain angle b, the value of which is between 5° and 7°; the rake face of the blade body (1) and the base plane (2) on the horizontal projection plane form a certain angle c, the value of which is between 19° and 21°; the vertical distance between the lowest point of the groove structure between the chip-returning protrusion (3) of the blade body (1) and the highest point of the acute-angled cutting tip (12) of the blade body (1) is H2, the value of which is between 0.04mm and 0.06mm; the vertical distance between the highest point of the chip-returning protrusion (3) and the highest point of the acute-angled cutting tip (12) is 0mm; the vertical distance between the intersection of the chip-returning protrusion R and the chip-returning protrusion plane on the horizontal projection plane and the horizontal projection of the highest point of the acute-angled cutting tip (12) is B4, the value of which is between 0.5mm and 0.6mm.