Compound tool

Abstract

The utility model discloses a compound cutter, which relates to the technical field of cutters, and comprises a cutter shell and a cutting edge part, the cutting edge part is arranged on the cutter shell, and the cutting edge point of the cutting edge part extends out of the cutter shell; wherein the cutter shell is a shell made of a corrosion-resistant cutter material; the cutter shell and the cutting edge part are welded into a whole, and the cutter shell and the cutting edge part are fixed through a fixing piece. The corrosion resistance of the cutter can be improved, and the overall strength and stability of the cutter can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a composite cutting tool. Background Art

[0002] Among the cutting tools (such as industrial, food cutting blades, ice skates, kitchen knives, engineer shovels, survival knives, scalpels, shovels, axes, etc.) popular in the food industry, cutting industry and even production and life nowadays, although the carbon steel knives have high hardness (hardness HRC48-66), most of their blade bodies are poorly protected, they are heavy, easy to rust, brittle and break under high-intensity use, the rust pits are dirty and there is a risk of bacterial growth, and their appearance is very ugly and not easy to clean, so they cannot be widely used in the demanding industrial and food industries; while the stainless steel cutting tools (such as 3Cr13 or 5Cr15) popular in the food industry and kitchen utensils are also easily corroded by environments such as salt spray and seawater, and other parts except the blade are also at risk of being corroded in most environments, resulting in a large hygienic risk due to the wear of the cutting tool itself; in addition, for the cutting tools made of corrosion-resistant metal materials such as titanium alloy on the market, due to their low density, their wear resistance is poor, and even after complex heat treatment (such as nitriding and carburizing treatment), their hardness, sharpness retention and impact resistance are still inferior to traditional carbon steel and stainless steel cutting tools.

[0003] Therefore, there is an urgent need to provide a new cutting tool to solve the above problems existing in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a composite cutting tool to solve the above problems existing in the prior art, which can improve the corrosion resistance of the cutting tool and ensure the overall strength and stability of the cutting tool.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] The utility model provides a composite cutting tool, which includes a tool housing and a blade part. The blade part is installed on the tool housing, and the blade tip of the blade part extends out of the tool housing; wherein, the tool housing is a housing made of corrosion-resistant tool material; the tool housing and the blade part are welded together and fixed by a fixing member.

[0007] Preferably, a sterilization layer is further arranged between the tool housing and the blade part.

[0008] Preferably, the tool housing includes an upper tool shell and two relatively arranged tool outer shells. The upper tool shell is clamped between the two tool outer shells, and an installation groove is formed by the upper tool shell and the two tool outer shells. One end of the blade part far from its blade tip is installed in the installation groove.

[0009] Preferably, one end of the blade portion away from its blade tip is clamped and welded to the upper tool housing, and sterilization layers are provided between both sides of the connection between the blade portion and the upper tool housing and the tool housing.

[0010] Preferably, the upper tool housing and the two tool housings are welded together, and the upper tool housing and the two tool housings are fixed by fixing members;

[0011] The blade portion and the two tool housings are welded together, and the blade portion and the two tool housings are fixed by fixing members.

[0012] Preferably, the sterilization layer includes one or more of a copper sterilization layer, a zinc sterilization layer, a silver sterilization layer, a nickel sterilization layer, a tin sterilization layer, and a gold sterilization layer.

[0013] Preferably, the sterilization layer includes a copper sterilization layer, a zinc sterilization layer, and a silver sterilization layer. The copper sterilization layer, the zinc sterilization layer, and the silver sterilization layer are sequentially arranged along the direction from the tool housing to the blade portion, and transition layers are provided between the copper sterilization layer and the zinc sterilization layer and between the zinc sterilization layer and the silver sterilization layer.

[0014] Preferably, the tool housing is a housing made of titanium, titanium alloy, aluminum alloy, ceramic, or oxide, and the blade portion is a blade portion made of steel, ceramic, powder metal material, tungsten carbide-derived alloy, tungsten alloy, or cobalt alloy.

[0015] Preferably, the tool housing is a titanium alloy housing, and the blade portion is a steel blade portion.

[0016] Preferably, the tool housing and the blade portion are brazed, diffusion welded, or hot pressure welded and press riveted together;

[0017] The fixing member is a rivet. Rivet holes are correspondingly provided on the tool housing and the blade portion. The tool housing and the blade portion are firmly riveted by the rivet. After being firmly riveted, the diffusion welding strength of the three-layer material can be made higher; wherein, the rivet holes are blind holes or through holes;

[0018] The blade portion is a blade portion that has undergone instantaneous quenching heat treatment.

[0019] The present utility model has achieved the following technical effects compared with the prior art:

[0020] In the present utility model, the composite tool includes a tool housing and a blade portion. The blade portion is installed on the tool housing, and the tool housing is a housing made of corrosion-resistant tool material, which improves the corrosion resistance of the part other than the blade compared with the traditional steel tool, and avoids generating a large health risk. Moreover, the tool housing and the blade portion are welded together and fixed with fixing parts, avoiding the problems of poor welding strength between corrosion-resistant tool materials such as traditional titanium alloy and materials such as steel, separation caused by too large expansion coefficient, and easy falling off, and ensuring the overall strength and stability of the tool. Further, in the present utility model, the blade portion can adopt a conventional blade, and the tool housing adopts corrosion-resistant tool material, which reduces the overall weight on the premise of ensuring the sharpness of the blade and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the composite tool in the first embodiment of the present utility model;

[0023] Figure 2 It is a side view of the composite tool in the first embodiment of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the tool housing in the first embodiment of the present utility model;

[0025] Figure 4 It is a split view of the tool upper housing and the blade portion in the first embodiment of the present utility model;

[0026] Figure 5 It is a connection diagram of the tool upper housing and the blade portion in the first embodiment of the present utility model;

[0027] Figure 6 It is a connection flow chart of the tool housing, the tool upper housing and the blade portion in the first embodiment of the present utility model;

[0028] Figure 7 It is a side view of the composite tool with the first type of blade in the first embodiment of the present utility model;

[0029] Figure 8 It is a side view of the composite tool with the second type of blade in the first embodiment of the present utility model;

[0030] Figure 9 It is a schematic diagram of the distribution of each sterilization layer in the first embodiment of the present utility model;

[0031] Figure 10 Schematic diagram of a transition layer provided between adjacent sterilization layers in the first embodiment of the present utility model;

[0032] Figure 11 Connection schematic diagram of a composite tool using the first type of cutting edge in the second embodiment of the present utility model;

[0033] Figure 12 Connection schematic diagram of a composite tool using the second type of cutting edge in the second embodiment of the present utility model;

[0034] Figure 13 Connection schematic diagram of a composite tool using the first type of cutting edge in the third embodiment of the present utility model;

[0035] Figure 14 Connection schematic diagram of a composite tool using the second type of cutting edge in the third embodiment of the present utility model.

[0036] In the figure: 1 - tool housing, 2 - tool upper housing, 3 - cutting edge part, 4 - rivet hole, 5 - copper sterilization layer, 6 - zinc sterilization layer, 7 - silver sterilization layer, 8 - transition layer, 9 - rivet, 10 - minute deformation. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0038] The purpose of the present utility model is to provide a composite tool to solve the problems existing in the above-mentioned prior art, which can improve the corrosion resistance of the tool and ensure the overall strength and stability of the tool.

[0039] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0040] Embodiment 1

[0041] As Figures 1-10 shown, this embodiment provides a composite tool, including a tool housing and a cutting edge part 3. The cutting edge part 3 is installed on the tool housing, and the cutting edge tip of the cutting edge part 3 extends out of the tool housing. Among them, the tool housing is a housing made of corrosion-resistant tool material; the tool housing and the cutting edge part 3 are welded together, and the tool housing and the cutting edge part 3 are fixed by fixing parts.

[0042] In this embodiment, the blade portion 3 is mounted on a tool housing made of corrosion-resistant tool material, which improves the corrosion resistance of the part other than the blade compared to traditional steel tools, avoiding a large hygienic risk. Moreover, the tool housing and the blade portion 3 are welded together and fixed with fixing parts, avoiding the problem that the welding strength between traditional corrosion-resistant tool materials such as titanium alloy and materials such as steel is poor and easy to fall off, ensuring the overall strength and stability of the tool. Further, in this embodiment, the blade portion 3 can adopt a conventional blade, while the tool housing adopts corrosion-resistant tool material, reducing the overall weight on the premise of ensuring the sharpness of the blade, making it more convenient to use and reducing the risk for vulnerable groups such as the elderly and women when using it.

[0043] In this embodiment, it should be noted that the materials of the tool housing and the blade portion 3 can be selected according to specific working requirements. For example, the material of the tool housing can be a lightweight and non-rusting tool material such as titanium, titanium alloy, aluminum alloy, oxide, ceramic, etc., and the material of the blade portion 3 can be a steel, ceramic, powder metal material or alloys such as tungsten carbide derivatives, tungsten, cobalt, etc.

[0044] As a preferred embodiment, in this embodiment, the tool housing can be a titanium alloy housing made of titanium alloy material, and the blade portion 3 can be a steel blade portion. The titanium alloy tool composed of the titanium alloy housing and the steel blade portion has a lighter specific gravity but higher strength. The lightweight of the titanium alloy tool can meet the usage requirements of the vast majority of people, greatly reducing the labor burden of people in terms of manufacturing, transportation and use. It also enables people to split high-hardness foods or items such as pork ribs more easily without worrying about the blade becoming dull after long-term use. Moreover, the titanium alloy tool exhibits better corrosion resistance and high-temperature resistance, and can be used in high-demand and high-standard fields such as food processing, chemical industry, and medical treatment. At the same time, it will not be affected by oxidation and corrosion after long-term use, so it will not produce harmful substances to the human body and can also be applied to tools such as axes, shovels, ice skates, and military equipment.

[0045] In this embodiment, it should be noted that the steel material used for the blade portion 3 can be selected according to specific working requirements, such as high-speed tool steel, 9Cr18Mo steel, VG10 steel, HAP40 steel, M390 steel, wootz steel, martensitic stainless steel, molybdenum steel, carbon steel, etc., and high-speed tool steel is preferably selected.

[0046] In this embodiment, as Figures 1-5As shown, the tool housing mainly includes a tool upper shell 2 and two relatively arranged tool outer shells 1. The tool upper shell 2 is clamped at the upper position between the two tool outer shells 1. And a mounting groove is formed by the lower part of the tool upper shell 2 and the two tool outer shells 1. One end of the blade part 3 away from its blade tip is installed in the mounting groove.

[0047] In this embodiment, one end of the blade part 3 away from its blade tip is clamped and welded with the tool upper shell 2 to form a tool inner core clamped between the two tool outer shells 1. Among them, the tool upper shell 2 and the two tool outer shells 1 are welded together, and the tool upper shell 2 and the two tool outer shells 1 are fixed by fixing parts. The blade part 3 and the two tool outer shells 1 are welded together, and the blade part 3 and the two tool outer shells 1 are fixed by fixing parts.

[0048] In this embodiment, a dovetail groove structure is preferably adopted for the fitting between one end of the blade part 3 away from its blade tip and the tool upper shell 2. However, it should be noted that the clamping structure in this embodiment is not limited to the dovetail groove structure, and other clamping structures can also be selected according to work needs.

[0049] In this embodiment, a sterilization layer is also provided between the tool housing and the blade part 3. Specifically, the sterilization layer is provided between the two sides of the connection between the blade part 3 and the tool upper shell 2 and the two tool outer shells on both sides. Among them, the sterilization layer is preferably a metal sterilization layer. In this embodiment, under the dual sterilization of titanium alloy and the metal sterilization layer, the composite tool has a sterilization friction process during each cutting, and the antibacterial effect is better.

[0050] In this embodiment, the tool outer shell 1, the tool upper shell 2 and the blade part 3 are all made of plates. The length of the plate is 100mm - 300mm, the width is 10mm - 30mm, and the thickness is 1mm - 2mm. The plate is cut into the designed shape by laser or other technologies, and then polished. After being polished smoothly, it is cleaned with strong alkali to remove rust and oil stains on the surface of the workpiece. Or it is wiped with a solvent such as acetone to make its metal luster appear. Thus, the roughness of the surface of the workpiece can be reduced, which is more conducive to the close fit between the metal and the metal surface, ensuring the welding quality and making the subsequent welding more accurate and firm.

[0051] In this embodiment, the tool housing and the cutting edge portion 3 can be welded together by brazing, diffusion welding or hot pressure welding, etc., preferably diffusion welding. Through diffusion welding, the tool housing and the cutting edge portion 3 can be tightly welded together; the fixing member is preferably a rivet 9, and rivet holes 4 are correspondingly provided on the tool housing and the cutting edge portion 3. Among them, the rivet hole 4 on the tool outer shell 1 is a blind hole, and the rivet holes 4 on the tool upper shell 2 and the cutting edge portion 3 are through holes. As Figure 6 shown, during diffusion welding, the rivet 9 passes through the tool upper shell 2 or the cutting edge portion 3 and is tightly sandwiched between the two tool outer shells 1. During the welding process, the tool outer shell 1 becomes soft due to high temperature, and a small deformation 10 is generated on the surface by the rivet 9 pushing out. After the outer shell is leveled, it becomes the finished product of the composite tool. This manufacturing method has both riveting performance and, after riveting and bonding, a diffusion connection phase is continuously generated between the rivet 9 and the material through hot pressing, so the strength is higher. It can also avoid the brittle fission that may occur during the welding process between the tool housing and the cutting edge portion 3, has good fatigue resistance, makes the combination more firm and will not loosen. At the same time, the pollution is smaller, and no thermal effect will be generated to damage the middle welding layer. The metal sterilization layer in the middle of the tool will also be protected; the cutting edge portion 3 is preferably a cutting edge portion 3 that has been subjected to instantaneous quenching heat treatment.

[0052] In this embodiment, diffusion welding technology is used for welding between the metal plates, and riveting or press riveting is used to firmly rivet them, so that the tool has good sealing and anti-permeation effects; and it greatly increases the anti-dynamic fatigue ability between the metal plates. Even when the tool cuts hard objects and generates high-frequency vibrations, it will not loosen and cause the cutting edge portion 3 to fall off.

[0053] The processing process of the composite tool in this embodiment is as follows:

[0054] The cutting edge portion 3 and the tool upper shell 2 are fitted using a dovetail groove structure to form a tool inner core, as Figure 5 shown; advanced technologies such as hot pressing, diffusion welding, and brazing are used for welding to make it perform seamless meshing and transverse and longitudinal diffusion of upper and lower ultra-high pressure tight thermal creep filling. The specific welding parameters are as follows:

[0055] Adjustable range of current: 0.3 - 30000A \ Voltage: 0.05 - 5000V;

[0056] Heat preservation and pressure holding time: 0.1 - 60000 seconds;

[0057] Set the whole curve to increase the temperature by 300°C in 0.5 - 100 minutes;

[0058] Pulse setting: 1 - 20000HZ, duration 0.2 - 3000 seconds;

[0059] Vacuum degree: 0 - 30 pressure rise 0.2 -5Pa;

[0060] Thermal vacuum range: 8*10 -1 pa~5*10 -4 pa;

[0061] Ultimate vacuum: 6*10 -7 pa;

[0062] According to the specific use strength requirements, a 0.1-5000um crystal bonding layer is diffused, and the thermal stress is used to weld them together firmly and lock them at the same time as the welding creep, and they are quickly fixed to prevent shrinkage. It has both metallurgical bonding and thermal adaptation bonding, plus riveting locking and sterilization metal to add additional welding bonding strength. Multiple bonds prevent cracking, welding and delamination, avoiding the risk of traditional welding that combines titanium alloy and steel and cannot withstand impact and can only withstand static loads. It can also be well used in high temperature environments above 0 to 700 degrees Celsius or cold environments of -20 to -70 degrees Celsius, truly achieving the purpose of wide application close to the parent material bonding.

[0063] In this embodiment, advanced diffusion welding technology is used for welding, which causes the lattice structure of the titanium alloy to change. At high temperatures, the titanium alloy will soften, changing the original microstructure, thereby affecting the macroscopic performance and causing changes in the mechanical properties; and repeated forging is performed according to the size and thickness of the manufactured tool plate to make the tool more durable and wear-resistant, thereby increasing its sharpness.

[0064] The tool housing 1, the tool upper housing 2 and the blade 3 are all preset with rivet holes. After the tool upper housing 2 and the blade 3 are welded together, they are welded to the tool housings 1 on both sides. At the same time, rivets 9 rivet the tool housings 1 on both sides and the tool inner core in the middle to make them more firmly fixed. Figure 1 shown.

[0065] After the welding is completed, the blade 3 needs to be sharpened, and the tool housing 1 on both sides also needs to be sharpened at the bottom, wherein the blade 3 can be Figure 7 The conventional blade shown in , or Figure 8 The single-sided blade shown in .

[0066] In this embodiment, the sterilization layer may include one or more of a copper sterilization layer 5, a zinc sterilization layer 6, a silver sterilization layer 7, a nickel sterilization layer, a tin sterilization layer and a gold sterilization layer, and the number, type and setting order of the metal sterilization layer are not required to be fixed.

[0067] As a preferred implementation, in this embodiment, Figures 9-10As shown, the sterilization layer includes a copper sterilization layer 5, a zinc sterilization layer 6, and a silver sterilization layer 7. The copper sterilization layer 5, the zinc sterilization layer 6, and the silver sterilization layer 7 are arranged in sequence along the direction from the tool housing to the cutting edge portion 3. Transition layers 8 made of copper, silver, etc. or alloy materials are provided between the copper sterilization layer 5 and the zinc sterilization layer 6, and between the zinc sterilization layer 6 and the silver sterilization layer 7, which play a role in filling the indentations on the surfaces of the two metals and accelerating the connection between steel and titanium and titanium alloys, thereby reducing or eliminating the possibility of the formation of brittle layers between steel and titanium alloys, and enabling the combined two materials to have the advantages of good impact resistance, toughness, and plasticity.

[0068] In this embodiment, copper, zinc, and silver metal coatings (i.e., the copper sterilization layer 5, the zinc sterilization layer 6, and the silver sterilization layer 7) are provided between the tool housing 1 and the tool core, which can improve wear resistance, extend service life, and effectively enhance the cutting ability; at the same time, copper, zinc, silver, etc. are all sterilization materials, and when combined with titanium alloy, the antibacterial ability is stronger.

[0069] Among them, silver ions have an adsorption effect on microorganisms. After adsorption, they will inhibit the respiratory enzymes of microorganisms, causing them to die quickly; the outer cell membrane of each cell is characterized by a microcurrent called "transmembrane potential". When microorganisms are adsorbed by silver ions and then exposed to the surface of copper, it will cause a short circuit in the current in the cell membrane, resulting in holes in the cell membrane and causing bacteria to die. At the same time, zinc ions are slowly released. Zinc ions have oxidation-reduction properties, which can damage the cell membrane structure and electron transport system of bacteria, and destroy the environment in which bacteria live, playing an antibacterial and bacteriostatic effect.

[0070] Furthermore, due to the welded combination of the copper sterilization layer 5 and the zinc sterilization layer 6, the resulting welded composite layer will protect the silver sterilization layer 7, inhibit the release of silver ions, so that they will not be released and directly penetrate the skin to reach the human body, and no harmful substances will be produced. Moreover, the three materials of zinc, copper, and silver will coordinate and inhibit each other. When this composite tool encounters acidic substances, copper and silver will inhibit the reaction between zinc and acid. When encountering an alkaline environment, zinc and copper ions will also combine with each other to form an antioxidant film to prevent the surface of the composite tool from being damaged.

[0071] In this embodiment, the composite tool is multi-layer combined and welded. During the use of the composite tool, a potential difference may be generated. For example, when cutting fruits, the fruit battery effect will occur. Zinc, copper metals react with the electrolytes in the fruits to generate chemical energy and convert it into a potential difference. The potential difference drives electrons to generate a micro current therein; this micro current is harmless to the human body, but it changes the living environment of microorganisms and generates ionization for ionization sterilization. Moreover, the micro current can alleviate the oxidation degree of fruits. For example, after cutting an apple with the composite tool in this embodiment, zinc and copper metals will generate ionization, eliminate the microorganisms on the surface of the apple, reduce the activity of enzymes in the apple, and thus reduce the oxidation rate of the apple, so that the apple can still have edible conditions when exposed to the air for a long time.

[0072] Through investigation and research, it is found that the human body is easy to absorb divalent iron elements but difficult to absorb trivalent iron elements. Divalent iron elements mainly exist in the blood and are easily utilized by the human body, while trivalent iron elements cannot be directly utilized by the human body. Instead, they need the help of gastric acid and the liver to be reduced to divalent iron before they can be absorbed by the intestine. Absorbing too much trivalent iron ions will burden the stomach and liver, resulting in "iron poisoning". The zinc and silver metals in the composite tool of this embodiment have strong reducibility and can also protect the ferrous ions in foods (such as fruits, animal livers, etc.), preventing divalent iron ions from reacting with oxygen and being oxidized to trivalent iron ions, thus protecting the nutritional components in the foods from loss and being easily absorbed by the human body.

[0073] In addition, experimental research shows that metallic copper has certain bactericidal properties. The reason is that copper ions are positively charged cations, while germs are negatively charged anions. So when germs come into contact with copper, a voltage difference will be generated, causing the cells on the surface of the germs to rupture. After copper ions enter the cells, the germs can no longer metabolize or replicate normally and die. Research shows that in different environments, basically no metal allergy reactions such as contact dermatitis will occur in various equipment made of copper. In addition to metallic copper, silver, zinc, gold, etc. all have varying degrees of bactericidal effects. Among them, the experimental data of the bactericidal rates of various metals are shown in Table 1. The ranking of the bactericidal rates per unit time of various metals from high to low is silver, copper, zinc, nickel, tin, gold.

[0074] Table 1. Bactericidal rates of various metals at different time periods

[0075]

[0076] According to this research, in this embodiment, a metal layer or alloy layer with bactericidal effects such as silver, zinc, and copper is laid on the contact surface of the composite tool. In the first half of the usage time, the bactericidal effect of silver is obvious, and in the second half of the usage time, the bactericidal effect of copper is obvious. The full-time sterilization during the use of the above metal sterilization layer ensures that no peculiar smell, mildew, putrefaction, acid smell, corrosion, etc. will occur in the long term. In addition, the above metal sterilization layer can also improve the welding performance and effect of the composite tool, make the connections of each layer tighter, and protect the blade part 3 from corrosion or delay the corrosion.

[0077] In summary, in this embodiment, a composite tool is formed by combining titanium alloy, steel, and bactericidal metal, which can not only reflect the high strength, low density, and anti-corrosion performance of titanium alloy, but also take into account sterilization; in this embodiment, a composite connection scheme is cleverly adopted, such as welding and riveting, which can combine the material properties of various parts of the composite tool while avoiding the problem of unreliable connection at the joint between titanium alloy and other metals caused by brittle crystallization in traditional titanium alloy and steel welding; by using mutual matching, three-dimensional stress analysis, etc., advanced welding methods such as brazing, diffusion welding, hot pressing creep dehydrogenation are combined with instantaneous riveting embedding, and complex processes such as instantaneous quenching heat treatment of the blade part 3 are used to manufacture the composite tool, realizing the combination of various excellent features and structures. By using the characteristics of high strength and corrosion resistance of titanium alloy, not only more than 80 - 90% of the part other than the blade part 3 is corrosion-resistant, but the exposed blade part 3 is easy to clean and polish, keeping the blade part 3 sharp and wear-resistant; and the weight of titanium alloy is lighter. The different colors of the metal sterilization layer in the middle of the composite tool increase the recognizability of the tool, and the multi-layer composite texture is not only beautiful but also increases the anti-folding safety factor of the blade body.

[0078] Embodiment Two

[0079] This embodiment is a modification based on Embodiment One. The main differences from Embodiment One are as follows:

[0080] As Figure 11 and Figure 12 shown, in this embodiment, the rivet holes on the two tool housings 1 on both sides of the blade part 3 are countersunk holes; during the diffusion connection process, the tool housing 1 and the rivet 9 are under the action of high temperature and high pressure in a vacuum, and the atoms on the contact surfaces of the two materials are diffusion-welded into one body, and then become the finished product of the composite tool after leveling treatment. Using this manufacturing method, the firmness is still very high.

[0081] Embodiment Three

[0082] This embodiment is a modification based on Embodiment Two. The main differences from Embodiment Two are as follows:

[0083] As Figure 13 and Figure 14As shown, in this embodiment, only the rivet holes on the tool housing 1 on one side of the blade portion 3 are countersunk holes to meet different requirements under different working conditions.

[0084] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A composite tool, characterized in that: It includes a tool housing and a blade portion, wherein the blade portion is mounted on the tool housing, and the tip of the blade portion extends out of the tool housing; wherein the tool housing is a housing made of corrosion-resistant tool material; the tool housing and the blade portion are welded together, and the tool housing and the blade portion are fixed by a fixing member.

2. The composite tool according to claim 1, characterized in that: A sterilization layer is also provided between the tool housing and the blade portion.

3. The composite tool according to claim 2, characterized in that: The tool housing includes an upper tool shell and two oppositely arranged tool shells, wherein the upper tool shell is clamped between the two tool shells, and the upper tool shell and the two tool shells form a mounting groove, and the end of the blade portion away from its blade tip is mounted in the mounting groove.

4. The composite tool according to claim 3, characterized in that: One end of the blade portion away from the blade tip is clamped and welded to the tool upper shell, and the sterilization layer is arranged between the tool outer shell and both sides of the connection between the blade portion and the tool upper shell.

5. The composite tool according to claim 3, characterized in that: The tool upper shell and the two tool outer shells are welded together, and the tool upper shell and the two tool outer shells are fixed by a fixing piece; The blade portion and the two pieces of the tool housing are welded together, and the blade portion and the two pieces of the tool housing are fixed by a fixing piece.

6. The composite tool according to any one of claims 2 to 5, characterized in that: The sterilization layer includes one or more of a copper sterilization layer, a zinc sterilization layer, a silver sterilization layer, a nickel sterilization layer, a tin sterilization layer and a gold sterilization layer.

7. The composite tool according to claim 6, characterized in that: The sterilization layer includes a copper sterilization layer, a zinc sterilization layer and a silver sterilization layer, and the copper sterilization layer, the zinc sterilization layer and the silver sterilization layer are arranged in sequence along the direction from the tool housing to the blade portion, and a transition layer is arranged between the copper sterilization layer and the zinc sterilization layer and between the zinc sterilization layer and the silver sterilization layer.

8. The composite tool according to any one of claims 1 to 5, characterized in that: The tool housing is a housing made of titanium, titanium alloy, aluminum alloy, ceramic or oxide, and the blade is a blade made of steel, ceramic, powdered metal material, tungsten carbide derived alloy, tungsten alloy or cobalt alloy.

9. The composite tool according to claim 8, characterized in that: The tool housing is a titanium alloy housing, and the blade portion is a steel blade portion.

10. The composite tool according to claim 1, characterized in that: The tool housing and the blade portion are welded together by brazing, diffusion welding or hot pressing welding; The fixing member is a rivet, and rivet holes are correspondingly arranged on the tool housing and the blade portion, and the tool housing and the blade portion are firmly riveted by the rivet, wherein the rivet hole is a blind hole or a through hole; The blade portion is a blade portion that has undergone transient quenching heat treatment.

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