Novel cutting saw blade special for large-diameter steel pipe

Abstract

The utility model discloses a novel cutting saw blade special for a large-diameter steel pipe, and relates to the field of steel cutting machining. According to the novel cutting saw blade special for the large-diameter steel pipe, the front tool face of a tool bit is in an inverted rhombus shape, the front angle gamma of the front tool face designed in the inverted rhombus shape is 0 degree, the rear angle alpha of the rear tool face of the tool bit is 10 degrees, teeth of the tool bit are horizontally-crossed teeth, the horizontally-crossed teeth are in a left-right horizontally-oblique tooth shape and are distributed in a staggered mode, the tool cutting edge angle epsilon of the oblique face of each horizontally-crossed tooth is 15 degrees, and the width of the flat end of each horizontally-crossed tooth is 0.5 mm. Meanwhile, the tool bit is made of a metal ceramic alloy material and comprises 84% of carbides such as titanium carbide, silicon carbide and tungsten carbide and 16% of cobalt and nickel binding phases, the density is 7.2-7.3 g / cm < 3 >, the breaking strength is larger than or equal to 1600 N / mm < 2 >, the hardness is HV 101390-1480, the grain size is 1.0-1.2, and the tool bit can be used for machining the tool bit. The characteristics of good heat resistance, high wear resistance and small affinity with stainless steel are met.

Description

Technical Field

[0001] The utility model relates to the technical field of steel cutting and processing, in particular to a novel saw blade specially used for cutting large-diameter steel pipes. Background Art

[0002] The main cutting methods for large-diameter steel pipes include welding cutting, cutting machine cutting, flame plasma cutting, oxygen cutting, laser cutting, etc. You can choose the appropriate cutting method according to different needs and specific circumstances.

[0003] The principle of the welding cutting method is to use a high-temperature arc to cut a section of the steel pipe and supplement it with a coaxial arc welder to complete the cutting process. This method can achieve high-precision cutting and will not produce large cutting deformation, but it requires the use of special equipment and technology, and the cutting speed is slow and the cost is high.

[0004] The cutting machine cutting method is a commonly used method for cutting large-diameter steel pipes. The principle is to use an electric cutting machine or a hydraulic cutting machine and cut with the cutting saw blade on the cutting machine to complete the cutting process. This method is simple to operate and low in cost, but the cutting accuracy is relatively low, and the cutting saw blade has a short service life and needs to be replaced frequently.

[0005] Flame plasma cutting utilizes a plasma flame of oxygen and fuel gas to cut large-diameter steel pipes. The principle is to spray a mixture of oxygen and fuel gas onto the pipe surface to create a flame and perform the cutting. This method is suitable for cutting large-diameter steel pipes and various steel materials. While it offers high cutting speeds, it also offers low precision, is prone to deformation, and generates significant waste and sparks.

[0006] Oxygen cutting uses oxygen to oxidize and burn the steel pipe, which is then cut by the cutting blade. The principle is that the high-temperature oxidation combustion of oxygen cuts the steel pipe. This method has a fast cutting speed and high cutting accuracy, but it requires a special cutting blade and generates a lot of heat and smoke during the cutting process.

[0007] Laser cutting is a high-precision method for cutting large-diameter steel pipes. It utilizes the high energy and density of a laser beam for cutting. This method is suitable for cutting a wide range of large-diameter steel pipes and can achieve high-precision cutting, but the equipment is expensive.

[0008] The cutting saw blades used in the cutting machine cutting method have a short service life and need to be replaced frequently. The main reason is that the blade's tooth tip has poor chipping resistance and is easy to break. At the same time, the tooth tip has poor heat dissipation, which easily leads to heat accumulation and thermal deformation of the blade. For this reason, a new type of large-diameter steel pipe special cutting saw blade is specially provided to greatly extend the service life of the blade and reduce the replacement frequency. Utility Model Content

[0009] In response to the shortcomings of the existing technology, the utility model provides a new type of special cutting saw blade for large-diameter steel pipes, which solves the problem that the cutting saw blade in the cutting machine cutting method has a short service life and needs to be replaced frequently. The main reason is that the blade head tooth tip has poor anti-chipping performance and is easy to break. At the same time, the tooth tip has poor heat dissipation performance, which easily leads to heat accumulation and causes thermal deformation of the blade.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a new type of large-diameter steel pipe cutting saw blade, comprising a saw blade body and a cutter head integrally formed and arranged on the outer peripheral wall of the saw blade body, wherein the cutter head is distributed in an annular array on the outer surface of the saw blade body;

[0011] The rake surface of the cutter head is an inverted rhombus;

[0012] The tooth shape of the cutter head is parallel teeth.

[0013] Preferably, the rake angle γ of the inverted rhombus-shaped rake face is 0°, and the clearance angle α of the clearance face of the tool head is 10°.

[0014] Preferably, the parallel teeth are parallel and oblique teeth that are staggered.

[0015] Preferably, the main deflection angle ε of the inclined plane of the parallel teeth is 15°.

[0016] Preferably, the flat end width of the flat-cross teeth is 0.5 mm.

[0017] The utility model discloses a novel large-diameter steel pipe cutting saw blade, which has the following beneficial effects:

[0018] 1. The saw blade specially designed for cutting large-diameter steel pipes has an inverted rhombus-shaped rake face. The rake angle γ of the inverted rhombus-shaped rake face is 0°, and the back angle α of the inverted rhombus-shaped rake face is 10°. The tooth profile of the cutter head is flat-cross teeth, and the flat-cross teeth are staggered with left and right flat-bevel teeth. The main deflection angle ε of the flat-cross teeth is 15°, and the flat end width of the flat-cross teeth is 0.5mm, thereby improving the anti-chipping performance of the tooth tip of the cutter head and enhancing the heat dissipation performance of the tooth tip.

[0019] 2. The blade is specially made for cutting large-diameter steel pipes. The blade head is made of metal-ceramic alloy, which contains 84% carbides such as titanium carbide, silicon carbide, and tungsten carbide + 16% cobalt and nickel bonding phases. It has a density of 7.2-7.3g / cm3, a flexural strength of ≥1600N / mm2, a hardness of HV101390-1480, and a grain size of 1.0-1.2. It has the characteristics of good heat resistance, high wear resistance, and low affinity with stainless steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the outer surface structure of the saw blade body of the utility model;

[0022] Figure 2 This is a schematic diagram of the side structure of the cutter head of the utility model;

[0023] Figure 3 This is a schematic diagram of the front view structure of the cutter head of the utility model;

[0024] Figure 4 This is a schematic diagram of the top view of the cutter head of the utility model.

[0025] In the figure: 1. Cutting head; 2. Cutting head rake surface; 3. Rake angle; 4. Back angle; 5. Flat teeth; 6. Main deflection angle; 7. Flat end width; 8. Saw blade body. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0027] The embodiment of the present application solves the problem that the cutting saw blade in the cutting method of the cutting machine has a short service life and needs to be replaced frequently by providing a new type of special cutting saw blade for large-diameter steel pipes. The main reason is that the tip of the blade has poor chipping resistance and is easy to break. At the same time, the heat dissipation of the tooth tip is poor, which easily leads to heat accumulation and causes thermal deformation of the blade.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] The embodiment of the utility model discloses a novel saw blade specially used for cutting large-diameter steel pipes.

[0030] According to the attached Figure 1-4As shown, it includes a saw blade body 8 and a cutter head 1 integrally formed and arranged on the outer peripheral wall of the saw blade body 8. The cutter head 1 is distributed in a ring-shaped array on the outer surface of the saw blade body 8; the cutter head 1 is made of metal ceramic alloy, containing 84% carbides such as titanium carbide, silicon carbide, tungsten carbide + 16% cobalt and nickel bonding phases, with a density of 7.2~7.3g / cm3, a bending strength ≥1600N / mm2, a hardness of HV101390~1480, and a grain size of 1.0-1.2, which meets the characteristics of good heat resistance, high wear resistance, and low affinity with stainless steel.

[0031] The rake face of the cutter head 1 is an inverted rhombus, with a rake angle γ=0° and a back angle α=10° of the back face of the cutter head 1, which improves the anti-chipping performance of the tooth tip of the cutter head 1 and enhances the heat dissipation performance of the tooth tip.

[0032] The tooth shape of the cutter head 1 is a flat-crossed tooth, which is a staggered distribution of left and right flat-oblique teeth. The main deflection angle ε of the flat-crossed tooth is 15°, and the flat end width of the flat-crossed tooth is 0.5mm, which further improves the anti-chipping performance of the tooth tip of the cutter head 1 and enhances the heat dissipation performance of the tooth tip.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A new type of saw blade specially used for cutting large-diameter steel pipes, comprising a saw blade body (8) and a cutter head (1) integrally formed and arranged on the outer peripheral wall of the saw blade body (8), characterized in that: The cutter heads (1) are distributed in an annular array on the outer surface of the saw blade body (8); The front cutting surface of the cutting head (1) is in the shape of an inverted rhombus; The tooth shape of the cutter head (1) is parallel teeth.

2. The novel large-diameter steel pipe cutting saw blade according to claim 1, characterized in that: The rake angle γ of the inverted rhombus-shaped front cutting edge is 0°, and the back angle α of the back cutting edge of the tool head (1) is 10°.

3. The novel large-diameter steel pipe cutting saw blade according to claim 1, characterized in that: The horizontally intersecting teeth are horizontally oblique teeth that are staggered.

4. The novel large-diameter steel pipe cutting saw blade according to claim 1, characterized in that: The main deflection angle ε of the inclined plane of the parallel teeth is 15°.

5. The novel large-diameter steel pipe cutting saw blade according to claim 1, characterized in that: The flat end width of the flat-cross teeth is 0.5 mm.

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