Hard alloy art knife blade

Abstract

The utility model discloses a hard alloy art designing blade which comprises a carbon steel blade body, an installation groove is formed in the front side of the carbon steel blade body, a hard alloy cutting edge head is welded in the installation groove, two installation holes are formed in the rear side of the carbon steel blade body, and the number of the installation holes is two. The carbon steel cutter body is used for welding the hard alloy blade head, the used hard alloy blade head is integrated, the problem that a second layer is exposed after abrasion does not exist, the high hardness and abrasion resistance of hard alloy are effectively utilized, and therefore the service life is greatly prolonged, the cutter body is made of carbon steel, and the service life is prolonged. According to the art designing blade, the manufacturing cost of the art designing blade is effectively reduced, the requirements under multiple scenes can be met, the art designing blade adopts a manufacturing process different from an existing manufacturing process in the market, a new manufacturing process is adopted, and the technical means of low cost and long service life can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of handicraft technology, specifically a carbide craft blade. Background Technology

[0002] Utility blades are widely used in handicrafts and crafts, office supplies and stationery, printing and packaging, home improvement and DIY, and other daily life applications. Their performance directly affects cutting efficiency and quality.

[0003] Most existing utility knife blades are still limited to a single-blade design and are mostly made of a single material; most utility knife blades are produced using the following materials and processes: carbon steel / tool ​​steel, bimetallic / high-speed steel, tungsten carbide particle deposition, etc.

[0004] Carbon steel: Carbon steel has relatively low hardness. The Rockwell hardness (HRC) of ordinary carbon steel is generally between 10 and 60, while the hardness of low-carbon steel is usually less than 20 HRC. Its hardness mainly depends on the carbon content; the higher the carbon content, the higher the hardness, but the toughness will decrease accordingly. Wear resistance: Poor wear resistance. During cutting or friction, the surface of carbon steel is easily worn. Because the main components of carbon steel are iron and carbon, its microstructure is relatively simple. When subjected to friction, iron atoms on the surface are easily scraped or detached. For example, in knife applications, knives made of carbon steel easily dull their edges and have a short service life when cutting harder materials.

[0005] High-speed steel; Hardness: High-speed steel has a high hardness, typically ranging from 62-67 HRC. It is an alloy steel containing alloying elements such as tungsten, molybdenum, chromium, and vanadium. Wear resistance: It exhibits good wear resistance. The alloy carbides in high-speed steel effectively resist wear. During cutting, high-speed steel tools maintain a sharp cutting edge. High-speed steel tools are more wear-resistant than carbon steel tools, maintaining good performance for a longer period and reducing the frequency of tool changes.

[0006] Carbide; Hardness: Carbide has extremely high hardness, typically between 80 and 95 HRA. It is primarily composed of hard compounds of refractory metals (such as tungsten carbide and titanium carbide) and binder metals (such as cobalt and nickel). The hard compounds impart extremely high hardness, enabling it to withstand high pressure and high friction. Wear Resistance: Excellent wear resistance. The hard phase of carbide effectively resists various forms of wear, including abrasive wear and adhesive wear. Under most working conditions, carbide tools exhibit significantly higher wear resistance than carbon steel and high-speed steel tools. Carbide tools can maintain edge sharpness for extended periods and offer higher machining accuracy.

[0007] While using solid low-hardness carbon steel allows for coil processing and has low processing costs, the material limits its flexibility, and the cutting edge is prone to wear, resulting in a short service life and the need for regular replacement. Using solid cemented carbide improves performance to some extent, but its high material cost and excessive hardness prevent processing in a purely coiled state, significantly increasing manufacturing costs and making it unsuitable for widespread use due to its inability to meet diverse application needs. Bimetallic machining using laser deposition can deposit hard material on the steel strip end in a purely coiled state, increasing the hardness of the machined cutting edge. However, because the blade alternates between forward and reverse directions in a purely coiled state, the hard material deposits not only on the cutting edge but also on the back, resulting in material waste. Furthermore, the back requires subsequent reprocessing, increasing the processing complexity and failing to effectively reduce costs. Additionally, the laser-deposited hard material is not intrinsically sintered, leading to poor stability, easy detachment during use, and loss of wear resistance after wear, resulting in an unstable lifespan. Utility Model Content

[0008] The purpose of this invention is to provide a carbide utility knife blade to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a carbide utility knife blade, comprising a carbon steel blade body, a mounting groove on the front side of the carbon steel blade body, a carbide cutting tip welded inside the mounting groove, the inner side of the mounting groove being adapted to the outer side of the carbide cutting tip, the mounting groove facilitating the installation of the carbide cutting tip, and two mounting holes on the rear side of the carbon steel blade body, the two mounting holes being spaced apart, wherein there can be two or more mounting holes, the mounting holes allowing the utility knife blade to adapt to the mounting holes of different sheaths.

[0010] Preferably, the thickness of the carbide cutting tip is not less than the thickness of the carbon steel blade. The cutting edge of the carbide cutting tip after welding is flush with or protrudes from the front edge of the carbon steel blade, so as to improve the controllability of deviation during the welding of the carbide cutting tip.

[0011] Preferably, the length of the carbide cutting tip is between 5-26mm, the width of the carbide cutting tip is between 2-5mm, and the hardness of the carbide cutting tip is between HRA 80-94, which improves the service life of the carbide cutting tip to a certain extent.

[0012] Preferably, the tip of the carbide cutting tip is a right angle or has a radius (R), which makes the carbide cutting tip perform better.

[0013] Preferably, the hardness of the carbide cutting tip is set between HRA80 and 94 to meet the cutting needs of different objects in various scenarios.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model uses a carbon steel blade body welded with a carbide cutting tip. The carbide cutting tip used is integral, which not only eliminates the problem of a second layer being exposed after wear, but also effectively utilizes the high hardness and wear resistance of carbide to significantly improve the service life. Moreover, the blade body is made of carbon steel, which effectively reduces the manufacturing cost of this utility knife blade. It can meet the needs of multiple scenarios and has the characteristics of long service life, higher cutting edge precision, and low manufacturing cost.

[0016] This utility knife blade uses a different manufacturing process than those currently available on the market. It employs a new manufacturing process that enables low cost and long lifespan, overcoming the shortcomings of low cost in achieving long lifespan and high cost in meeting the needs of multiple scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the vertical angle of the carbon steel blade and the carbide cutting tip of this utility model.

[0019] Figure 3 This is a comparison chart of cutting test data for the carbide cutting tip of this utility model.

[0020] In the diagram: 1. Carbon steel blade; 2. Carbide tip; 3. Mounting hole; 4. Mounting slot. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figure 1-3 This utility model provides a carbide utility knife blade, including a carbon steel blade body 1. The front side of the carbon steel blade body 1 has a mounting groove 4, and a carbide cutting head 2 is welded inside the mounting groove 4. The inner side of the mounting groove 4 is adapted to the outer side of the carbide cutting head 2. The mounting groove 4 facilitates the installation of the carbide cutting head 2. The rear side of the carbon steel blade body 1 has two mounting holes 3, which are spaced apart. There can be two or more mounting holes 3, which allows the utility knife blade to adapt to the mounting holes of different sheaths.

[0023] The thickness of the raw material used for welding the carbide cutting tip 2 is greater than the thickness of the carbon steel blade 1. The thickness of the carbide cutting tip 2 after grinding is greater than or equal to the thickness of the carbon steel blade 1. The cutting edge of the carbide cutting tip 2 after welding is flush with or protrudes from the front edge of the carbon steel blade 1, so as to improve the controllability of deviation during the welding of the carbide cutting tip 2.

[0024] The length of the carbide cutting tip 2 is between 5-26mm, the width of the carbide cutting tip 2 is between 2-5mm, and the hardness of the carbide cutting tip 2 is between HRA 80-94, which improves the service life of the carbide cutting tip 2 to a certain extent.

[0025] The tip of the carbide cutting tip 2 is a right angle or has a radius, which makes the carbide cutting tip 2 perform better.

[0026] The angle A between the vertical planes of the carbon steel blade 1 and the carbide cutting tip 2 is 10°-90° to meet the cutting needs of different objects in various scenarios.

[0027] In this embodiment, the utility knife blade is installed onto the desired sheath via mounting hole 3. The manufacturing process of this utility knife blade is as follows:

[0028] Step 1: Stamping. Select coiled steel of appropriate size according to the specifications and dimensions of the blade to be made, and use a punch press to stamp out the blade base. The blade base contains one or more mounting grooves and mounting holes adapted to different blade sheaths.

[0029] Step 2: Grinding. Grind the edges of the blade base to remove burrs.

[0030] Step 3: Welding. Using homemade welding equipment, fix the carbide cutting tip into the mounting groove by brazing.

[0031] Step 4: Polishing. Use a polishing machine to polish both sides of the welded blade to make the carbide tip and the blade base thickness consistent.

[0032] Step 5: Grinding. Use high-precision grinding equipment to grind and sharpen the blade.

[0033] The blades produced using this method have significant advantages over existing blades on the market under the same testing environment and conditions, with a lifespan several times longer.

[0034] The following is the test content:

[0035] The cutting tools tested were categorized as follows: ordinary cutting tools, alloy-deposited cutting tools, ceramic cutting tools, and carbide cutting tool tips.

[0036] The materials used in this test were: 7mm thick five-layer corrugated paper and 8.5mm thick ceiling plasterboard;

[0037] Test procedure: Five layers of corrugated paper and plasterboard were cut using various blades at a cutting angle of approximately 45°. The cutting depth was to completely cut through the board. The cutting length was recorded during the cutting process until it could no longer be cut, and then the results were statistically analyzed.

[0038] Because this test was conducted manually, instability may cause errors in the data. However, the test results show that the lifespan of alloy blade tips is much longer than that of other blades.

[0039] The test results are shown in the attached diagram in the instruction manual.

[0040] 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 carbide utility knife blade, characterized in that: The blade includes a carbon steel blade (1), with two mounting slots (4) on the front side of the carbon steel blade (1), and a carbide cutting tip (2) welded inside each of the two mounting slots (4). The rear side of the carbon steel blade (1) has two mounting holes (3), which are spaced apart.

2. The carbide utility knife blade according to claim 1, characterized in that: The thickness of the carbide cutting tip (2) is not less than the thickness of the carbon steel blade (1), and the cutting edge of the carbide cutting tip (2) is flush with or protrudes from the front edge of the carbon steel blade (1).

3. The carbide utility knife blade according to claim 1, characterized in that: The length of the carbide cutting tip (2) is set at 5-26mm, and the width of the carbide cutting tip (2) is set at 2-5mm.

4. The carbide utility knife blade according to claim 1, characterized in that: The tip of the carbide cutting tip (2) is a right angle or has a radius (R).

5. A carbide utility knife blade according to claim 3, characterized in that: The hardness of the carbide cutting tip (2) is set between HRA80 and 94.

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