Fine grinding blade blank for small parts machining

Abstract

The present application belongs to the technical field of fine grinding blade blank for small parts machining, which comprises a fine grinding blade blank, the fine grinding blade blank is in the shape of a rhombic block and is provided with a blade tip at two opposite corners, mirror image chip removal grooves are provided on both sides of the top of the fine grinding blade blank near the blade tip, a horizontal center platform is provided at the center of the top of the fine grinding blade blank, a through mounting hole is provided at the center of the fine grinding blade blank, grinding end faces are provided at four side ends of the fine grinding blade blank, a vertical end face is provided at the intersection of the top edge of the grinding end face and the chip removal groove, the vertical end face is at the same height as the edge of the chip removal groove and the center platform, and a corrugated chip guide section is provided in the chip removal groove; the fine grinding blade blank is designed for blade grinding for small parts machining, the overall profile of the chip removal groove is raised, a grinding allowance is added around the profile, the excess allowance is made into a vertical end face, the strength during double-end-face grinding is ensured, the height of the blade tip can be accurately controlled, and the absolute high precision of the finished blade can be well ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of precision grinding blade blanks, and particularly relates to precision grinding blade blanks for machining small parts. Background Technology

[0002] The dimensional stability of precision-ground cutting tools is crucial during the grinding process, as it determines the lifespan stability of the finished tool during parts machining, thus impacting production efficiency. Therefore, the design and dimensional controllability of the blank material before precision-ground cutting tools are a critical step.

[0003] The existing blank material design method for cutting tools uses a cutting tip lower than the center table. During grinding, the cutting tip position cannot be touched. Therefore, the height dimension of the cutting tip position cannot be controlled by grinding. Instead, it is determined by the die pressing of the forged blank material. However, the dimensional accuracy controlled by die pressing often cannot meet the processing requirements of small parts cutting tools, resulting in unstable lifespan during part processing, making the production process uncontrollable and leading to low production efficiency. Summary of the Invention

[0004] To address the problem in the prior art that the height of the cutting tip in existing cutting tool blanks cannot be controlled by grinding but is instead determined by molding the pre-forged blank, and that molding often fails to meet the machining requirements of small parts, leading to unstable tool life during machining, uncontrollable production processes, and low production efficiency, this invention provides the following technical solution:

[0005] This invention relates to a precision grinding blade blank for machining small parts, comprising a precision grinding blade blank, the precision grinding blade blank being a rhomboid block shape with blade tips at two opposite corners, chip removal grooves mirror-imagely formed on both sides of the top of the precision grinding blade blank near the blade tips, a horizontal center platform at the center of the top of the precision grinding blade blank, a through mounting hole at the center of the precision grinding blade blank, grinding end faces at the four sides of the precision grinding blade blank, and a vertical end face at the junction of the top edge of the grinding end face and the chip removal groove.

[0006] As a preferred technical solution of the present invention, the precision-ground tool blank is formed by high-temperature sintering of ultrafine alloy raw materials and the surface is coated with a nano 1000℃ stress deposition spray coating.

[0007] As a preferred embodiment of the present invention, a positioning groove communicating with the mounting hole is provided at the top of the mounting hole.

[0008] As a preferred embodiment of the present invention, the grinding end face is inclined at 45°-65°.

[0009] As a preferred embodiment of the present invention, the vertical end face is at the same height as the edge of the chip removal groove and the central platform.

[0010] As a preferred embodiment of the present invention, the chip removal groove is provided with a corrugated chip guiding section.

[0011] The beneficial effects achieved by this invention are:

[0012] By designing the chip guide groove to raise the overall profile and adding grinding allowance around the profile, and making the excess allowance into a vertical end face and raising it to the same height as the center table, the strength is maintained during double-end face grinding. At the same time, it is ensured that the tool tip position and the entire profile edge are completely ground to the required position during grinding. Thus, the tool tip height of the insert is corrected and ensured to remain consistent by grinding the tool tip with the end face.

[0013] After end face grinding to correct the tip height accuracy, a plateau surface is created at the tip position. Further peripheral grinding removes excess material, allowing for precise control of the tip height and ensuring the absolute high precision of the finished cutting tool. In summary, the numerous steps involved in mold pressing and sintering inherently introduce uncontrollability and uncertainty into traditional methods, making it impossible to guarantee precision. This design of the cutting tool blank avoids the uncontrollability of molded cutting tools, while the grinding process ensures absolute controllability of the tip height. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of the precision grinding blade blank for machining small parts according to the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the precision grinding blade blank for machining small parts according to the present invention. Figure 2 .

[0017] In the diagram: 1. Precision-ground tool blank; 2. Tool tip; 3. Chip removal groove; 4. Center table; 5. Mounting hole; 6. Grinding end face; 7. Vertical end face. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: Figure 1-2As shown, the precision grinding insert blank for machining small parts includes a precision grinding blank 1. The precision grinding blank 1 is a rhomboid block with a cutting tip 2 at two opposite corners. Chip removal grooves 3 are mirrored on both sides of the top of the precision grinding blank 1 near the cutting tip 2. A horizontal center table 4 is provided at the center of the top of the precision grinding blank 1. A through mounting hole 5 is provided at the center of the precision grinding blank 1. Grinding end faces 6 are provided on the four sides of the precision grinding blank 1. A vertical end face 7 is provided at the junction of the top edge of the grinding end face 6 and the chip removal groove 3.

[0020] The precision-ground blade blank 1 is made of ultra-fine alloy raw material sintered at high temperature and the surface is coated with a nano 1000℃ stress deposition spray coating. When in use, the ultra-fine alloy raw material is sintered at high temperature, which makes the overall impact resistance of the blade higher after grinding and shaping, and less prone to chipping. At the same time, it is combined with advanced coating technology to make the hardness better and the processing performance more stable.

[0021] The top of the mounting hole 5 has a positioning groove that communicates with the mounting hole 5. In use, the fine grinding blade is installed through the mounting hole after grinding, and the positioning groove can improve the firmness of the fine grinding blade installation by limiting its position.

[0022] The grinding end face 6 is inclined at 45°-65°. The inclined design makes it convenient to grind the cutting tool during use.

[0023] The vertical end face 7 is at the same height as the edge of the chip groove 3 and the center table 4. During use, this ensures that it maintains its strength when performing double-end face grinding, prevents chipping during grinding, and ensures that the position of the cutting tip 2 and the entire contour edge are completely ground in place during grinding. Thus, the cutting tip 2 is corrected and its height is kept consistent by grinding the cutting tip 2 with the end face.

[0024] The chip groove 5 is equipped with a corrugated chip guide section, which facilitates the discharge of grinding waste chips during use.

[0025] Specifically, the design principle is to raise the overall profile of the chip guide groove, add grinding allowance around the profile, and make the excess allowance into a vertical end face 7 and raise it to the same height as the center table 4 to ensure that it maintains its strength during double-end face grinding. At the same time, it ensures that the position of the cutting tip 2 and the entire edge of the profile are completely ground to the required position during grinding. Thus, the cutting tip 2 is corrected and its height is kept consistent by end face grinding. After the height accuracy of the cutting tip 2 is corrected by end face grinding, a plateau surface will be generated at the position of the cutting tip 2. Then, the excess allowance is removed by peripheral grinding. This completely eliminates the plateau surface generated by end face grinding and also allows for precise control of the height of the cutting tip 2.

[0026] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision-ground cutting tool blank for machining small parts, comprising a precision-ground tool blank (1), characterized in that: The precision-ground tool blank (1) is a rhomboid block with two opposite corners having a tool tip (2). The precision-ground tool blank (1) has a chip removal groove (3) mirrored on both sides of the top near the tool tip (2). The precision-ground tool blank (1) has a horizontal center platform (4) at the top center. The precision-ground tool blank (1) has a through mounting hole (5) at the center. The precision-ground tool blank (1) has grinding end faces (6) on its four sides. The top edge of the grinding end face (6) and the chip removal groove (3) have a vertical end face (7) at the junction. The vertical end face (7) is at the same height as the edge of the chip removal groove (3) and the center platform (4).

2. The precision-ground blade blank for machining small parts according to claim 1, characterized in that: The precision-ground tool blank (1) is made by high-temperature sintering of ultra-fine alloy raw materials and the surface is coated with a nano 1000℃ stress deposition spray coating.

3. The precision-ground cutting tool blank for machining small parts according to claim 1, characterized in that: The top of the mounting hole (5) is provided with a positioning groove that communicates with the mounting hole (5).

4. The precision-ground blade blank for machining small parts according to claim 1, characterized in that: The grinding end face (6) is inclined at 45°-65°.

5. The precision-ground cutting tool blank for machining small parts according to claim 1, characterized in that: The chip removal groove (3) is provided with a corrugated chip guide section.

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