Wear-resistant and collapse-resistant hard alloy steel cutter blade

Abstract

The utility model relates to the technical field of alloy steel cutter blades, and provides a wear-resistant and collapse-resistant hard alloy steel cutter blade which comprises a cutter blade and a cutter holder, a rear clamping edge is arranged on the rear portion of the cutter blade, a cutting edge is arranged on the front portion of the cutter blade, and a middle fixing block is arranged on the front portion of the cutter holder. Outer pressing plates are arranged on the upper portion and the lower portion of the front side of the middle fixing block, a certain gap is formed between the upper outer pressing plate and the lower outer pressing plate, the rear clamping edge is clamped in the gap between the upper outer pressing plate and the lower outer pressing plate, multiple sets of fastening bolts are installed between the rear clamping edge and the outer pressing plates, and the fastening bolts are of a detachable structure. The tool blade is detachably connected with the tool apron, the left portion and the right portion of the rear clamping edge are each provided with a plurality of sets of first screw holes, and the first screw holes are of a cylindrical screw hole structure. The cutting edge is thick and stable, the tool apron assembled on the rear portion of the tool blade is positioned and assembled accurately, stably and reliably, and it can be guaranteed that the tool blade is more resistant to collapse in the using process and is firmer, more wear-resistant and more durable.

Description

Technical Field

[0001] This utility model relates to the technical field of alloy steel cutting tool blades, specifically to a wear-resistant and chip-resistant cemented carbide steel cutting tool blade. Background Technology

[0002] Advanced shield tunneling technology is widely used in underground engineering construction in large and medium-sized cities. However, in complex geological conditions, shield cutter breakage and severe wear are frequent occurrences. Cutter replacement and maintenance are not only costly and disruptive to the construction schedule, but also pose risks during the replacement process, potentially leading to tunnel face instability or personnel casualties. Therefore, improving the cutting performance and wear resistance of shield cutters is essential.

[0003] Traditional shield tunneling cutters primarily use cemented carbide as the cutting component. While cemented carbide possesses relatively high hardness and wear resistance, it still falls far short of diamond. Traditional shield tunneling cutters are generally only suitable for cutting soft rock, exhibiting poor adaptability. When encountering medium-hard rock layers or gravel layers, they are prone to wear, resulting in low cutting efficiency and short lifespan. Therefore, it is necessary to invent a new type of shield tunneling cutter to overcome the shortcomings of traditional cutters, such as short lifespan and low efficiency, and to improve its adaptability to different formations, enabling it to perform well in soft rock, medium-hard rock layers, and gravel layers.

[0004] Alloy steel cutting tools are tools made with special materials and processes, primarily used for machining various metal materials, especially alloy steel. These tools are widely used in industrial production due to their excellent wear resistance and impact resistance. The high hardness of alloy steel cutting tools, with some reaching HRc62 or higher, makes them suitable for machining hardened steel and high-strength steel. The high precision of alloy steel cutting tools is ensured by advanced coating technology and precision manufacturing processes, guaranteeing high repeatability. The long service life of alloy steel cutting tools is also a factor, thanks to the use of high-performance materials and advanced design. When purchasing alloy steel cutting tools, it is essential to verify the material and coating type to ensure they meet machining requirements. The manufacturing process should also be checked; high-quality alloy steel cutting tools should be manufactured using advanced processes to ensure their performance and reliability.

[0005] The specification of a wear-resistant diamond tunnel boring machine (TBM) cutter (publication number CN205955739U) mentions that "the end of the TBM cutter body is provided with multiple cutting teeth, the cutting surface of the cutting teeth is provided with a diamond composite sheet, and the back of the TBM cutter body is provided with a diamond wear-resistant layer. Preferably, in the above-mentioned wear-resistant diamond TBM cutter, the diamond composite sheet is a composite sheet welded to the cutting surface of the cutting teeth by silver-based brazing filler metal, and the diamond wear-resistant layer is a wear-resistant layer electroplated on the back of the TBM cutter body. Preferably, in the above-mentioned wear-resistant diamond TBM cutter, the diamond composite sheet is a fully protruding or semi-protruding type composite sheet welded to the cutting surface of the cutting teeth." However, the cutting edge of the existing technology is too thin and not wear-resistant, the rear connection of the cutter is not firm and may break, and it is not strong, durable, or robust. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, a wear-resistant and chip-resistant cemented carbide steel cutting tool is provided to solve the problems of existing cutting tools having excessively thin cutting edges that are not wear-resistant, loose rear connections that may lead to chipping, and lack of sturdiness and durability.

[0007] To achieve the above objectives, a wear-resistant and chip-resistant cemented carbide steel cutting tool is provided, comprising a cutting tool and a tool holder. The cutting tool has a rear retaining edge at its rear end and a cutting edge at its front end. The tool holder has a central fixing block at its front end, and both the upper and lower parts of the front side of the central fixing block are provided with outer pressure plates, with a certain gap between the upper and lower sets of outer pressure plates. The rear retaining edge engages in the gap between the upper and lower sets of outer pressure plates, and multiple sets of fastening bolts are installed between the rear retaining edge and the outer pressure plates. The fastening bolts are detachable, and the cutting tool and the tool holder are detachably connected.

[0008] Furthermore, the left and right sides of the rear edge are provided with multiple sets of first screw holes, and the first screw holes adopt a cylindrical screw hole structure.

[0009] Furthermore, the rear side of the cutting tool is provided with grooves on both the upper and lower parts, and the grooves adopt a trapezoidal groove structure, and anti-slip pads are provided on the inner sidewalls of the grooves.

[0010] Furthermore, the anti-slip mat is made of rubber, and the thickness of the anti-slip mat is set to -mm.

[0011] Furthermore, a rear shank is provided in the middle of the rear part of the tool holder, and an insert is provided in the middle of the front part of the tool holder. The insert adopts a trapezoidal insert structure, and a notch is provided in the middle of the front part of the insert. The notch in the middle of the front part of the insert fits perfectly into the middle of the rear retaining edge.

[0012] Furthermore, the front part of the insert is fitted into the corresponding groove, and the front part of the insert and the groove are separately connected.

[0013] Furthermore, the outer pressure plate has multiple sets of second screw holes, and fastening bolts are installed between the relatively aligned second screw holes and the first screw holes. The outer end of the front side of the outer pressure plate is provided with a side edging, and the side edging surrounds the outer side of the cutting tool.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The rear retaining edge of the cutting tool blade in this utility model is designed to engage and assemble with the outer pressure plate at the front of the tool holder. This not only makes the installation convenient and quick but also more accurate, convenient and time-saving.

[0016] 2. This utility model utilizes the front part of the insert to fit into the groove, which ensures accurate and stable positioning. Moreover, the anti-slip pad set on the inner side wall of the groove provides safety and anti-slip, and reduces mutual wear.

[0017] 3. The rear retaining edge of the cutting tool blade of this utility model is engaged between the two sets of external pressure plates on the upper and lower sides of the front of the tool holder. Then, it is installed between the first and second screw holes with fastening bolts, thereby achieving a more stable, firm and reliable connection between the cutting tool blade and the tool holder. This helps to ensure that the cutting tool blade is not easily broken during use. In addition, the cutting tool blade is thick and firm, making it more wear-resistant and durable.

[0018] 4. The blade of this utility model is thick and stable, and the blade holder assembled at the rear of the blade is accurately, stably and reliably positioned, which helps to ensure that the blade is more resistant to chipping and more robust, wear-resistant and durable during use. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a top view of the cutting blade according to an embodiment of the present invention;

[0021] Figure 3 This is a rendering of the cutting tool blade according to an embodiment of the present utility model;

[0022] Figure 4 This is a front view schematic diagram of the cutting blade according to an embodiment of the present utility model;

[0023] Figure 5 This is a top view of the tool holder according to an embodiment of the present utility model.

[0024] In the diagram: 1. Cutting tool; 10. Cutting edge; 11. Groove; 12. Anti-slip pad; 13. Rear retaining edge; 14. First screw hole; 2. Tool holder; 20. Rear shank; 21. Middle fixing block; 22. Side edge; 23. Second screw hole; 24. Outer pressure plate; 25. Insert block; 3. Fastening bolt. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Specific details, such as particular system structures and technologies, are provided to facilitate a more thorough understanding of the embodiments of the present utility model. The described embodiments are some, but not all, of the embodiments disclosed herein. However, those skilled in the art should understand that the present utility model can also be implemented in other embodiments without these specific details. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0026] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] Figure 1 This is a top view schematic diagram of an embodiment of the present utility model. Figure 2 This is a top view of the cutting tool blade according to an embodiment of the present invention. Figure 3 The following is a rendering of the cutting tool blade according to an embodiment of this utility model. Figure 4 This is a front view schematic diagram of the cutting tool blade according to an embodiment of the present utility model. Figure 5 This is a top view of the tool holder according to an embodiment of the present utility model.

[0028] Reference Figures 1 to 5 As shown, this utility model provides a wear-resistant and chip-resistant cemented carbide steel cutting tool, including a cutting tool 1 and a tool holder 2. The cutting tool 1 has a rear retaining edge 13 at its rear end and a cutting edge 10 at its front end. The tool holder 2 has a central fixing block 21 at its front end, and both the upper and lower parts of the front side of the central fixing block 21 are provided with outer pressure plates 24, with a certain gap between the upper and lower sets of outer pressure plates 24. The rear retaining edge 13 is engaged in the gap between the upper and lower sets of outer pressure plates 24, and multiple sets of fastening bolts 3 are installed between the rear retaining edge 13 and the outer pressure plates 24. The fastening bolts 3 are detachable, and the cutting tool 1 and the tool holder 2 are detachably connected.

[0029] In this embodiment, multiple sets of first screw holes 14 are provided on both the left and right sides of the rear edge 13, and the first screw holes 14 adopt a cylindrical screw hole structure; the upper and lower parts of the rear side of the cutter 1 are provided with grooves 11, and the grooves 11 adopt a trapezoidal groove structure, and anti-slip pads 12 are provided on the inner sidewalls of the grooves 11.

[0030] As a preferred embodiment, the rear retaining edge 13 at the rear of the cutting tool 1 in this utility model is designed to engage and assemble with the outer pressure plate 24 at the front of the tool holder 2. This not only makes the installation convenient and quick but also more accurate, convenient, and effortless.

[0031] In this embodiment, the anti-slip pad 12 is made of rubber and the thickness of the anti-slip pad 12 is set to 2-3mm; a rear shank 20 is provided in the middle of the rear part of the tool holder 2, and an insert 25 is provided in the middle of the front part of the tool holder 2. The insert 25 adopts a trapezoidal insert structure and a notch is provided in the middle of the front part of the insert 25. The notch in the middle of the front part of the insert 25 fits into the middle of the rear retaining edge 13. The front part of the insert 25 is fitted into the corresponding groove 11, and the front part of the insert 25 and the groove 11 are detachably connected.

[0032] As a preferred embodiment, the present invention utilizes the front part of the insert 25 to fit into the groove 11, which ensures accurate and stable positioning. Moreover, the anti-slip pad 12 provided on the inner side wall of the groove 11 provides safety and anti-slip, and reduces mutual wear.

[0033] In this embodiment, the outer pressure plate 24 has multiple sets of second screw holes 23, and the fastening bolt 3 is installed between the relatively aligned second screw holes 23 and the first screw hole 14. The outer end of the front side of the outer pressure plate 24 is provided with a side edging 22, and the side edging 22 surrounds the outer side of the cutter blade 1.

[0034] In a preferred embodiment, the rear retaining edge 13 of the cutting tool 1 is engaged between the two sets of external pressure plates 24 on the upper and lower sides of the front of the tool holder 2. Then, the fastening bolts 3 are installed between the aligned first screw holes 14 and second screw holes 23, thereby achieving a more stable, firm and reliable connection between the cutting tool 1 and the tool holder 2. This helps to ensure that the cutting tool 1 is not easily broken during use. Furthermore, the cutting tool 1 is thick and firm, making it more wear-resistant and durable.

[0035] This invention effectively solves the problems of existing knives having thin blades that are not wear-resistant, loose rear connections that may break, and lack of sturdiness and durability. The blade of this invention is thick and stable, and the knife holder assembled at the rear of the blade is accurately, stably and reliably positioned, which helps to ensure that the blade is more resistant to breakage and more durable during use.

[0036] The above embodiments are used to explain and illustrate the present utility model, and are not intended to limit the utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims should be included within the protection scope of the present utility model.

Claims

1. A wear resistant, chip resistant cemented carbide steel tool insert characterized by: The tool includes a cutting blade (1) and a tool holder (2). The cutting blade (1) has a rear retaining edge (13) at its rear and a cutting edge (10) at its front. The tool holder (2) has a central fixing block (21) at its front. The central fixing block (21) has two outer pressure plates (24) on its front upper and lower sides. There is a certain gap between the two sets of outer pressure plates (24). The rear retaining edge (13) is engaged in the gap between the two sets of outer pressure plates (24). Multiple sets of fastening bolts (3) are installed between the rear retaining edge (13) and the outer pressure plates (24). The fastening bolts (3) are detachable. The cutting blade (1) and the tool holder (2) are connected separately.

2. A wear resistant, chip resistant cemented carbide steel tool insert according to claim 1, characterized in that, The left and right sides of the rear edge (13) are provided with multiple sets of first screw holes (14), and the first screw holes (14) adopt a cylindrical screw hole structure.

3. A wear resistant, chip resistant cemented carbide steel tool insert according to claim 1, characterized in that, The tool blade (1) has grooves (11) on both the upper and lower sides of its rear side, and the grooves (11) adopt a trapezoidal groove structure. Anti-slip pads (12) are provided on the inner sidewalls of the grooves (11).

4. A wear resistant, chip resistant cemented carbide steel tool insert according to claim 3, characterized in that, The anti-slip mat (12) is made of rubber, and the thickness of the anti-slip mat (12) is set to 2-3mm.

5. The wear resistant, chip resistant cemented carbide steel tool insert of claim 1, wherein, The tool holder (2) has a rear shank (20) in the middle of its rear part, and a block (25) is provided in the middle of its front part. The block (25) adopts a trapezoidal block structure, and a notch is provided in the middle of the front part of the block (25). The notch in the middle of the front part of the block (25) fits perfectly into the middle of the rear retaining edge (13).

6. A wear resistant, chip resistant cemented carbide steel tool insert according to claim 5, characterized in that, The front part of the insert (25) is fitted into the corresponding groove (11), and the front part of the insert (25) is separated from the groove (11).

7. A wear resistant, chip resistant cemented carbide steel tool insert according to claim 1, characterized in that, The outer pressure plate (24) has multiple sets of second screw holes (23), and fastening bolts (3) are installed between the relatively aligned second screw holes (23) and the first screw hole (14). The outer end of the front side of the outer pressure plate (24) is provided with a side edging (22), and the side edging (22) surrounds the outer side of the cutter blade (1).

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