Single-particle hard alloy reciprocating saw blade

Abstract

The utility model relates to the field of alloy saw blades, in particular to a single-particle hard alloy reciprocating saw blade which comprises a saw body, saw teeth welded at the upper end of the saw body and double-side chamfers arranged on two sides of the upper end of the saw teeth, and the saw teeth are arranged at the upper end of the saw body and comprise the double-side chamfers symmetrically arranged on two sides of the upper end of the saw body. The utility model has the beneficial effects that the negative rake angle or zero rake angle increases the thickness of the cutting edge, improves the strength of the cutting edge and reduces the tipping phenomenon; the characteristics of high hardness and high strength of the hard alloy material are fully utilized, so that stress concentration and brittle fracture are avoided; friction between sawteeth and a workpiece is reduced through the rear angle and the double-side chamfers, and cutting heat and abrasion are reduced; the smooth discharge of the cuttings further reduces the abrasion and heat influence of the cuttings on the sawteeth; by balancing the front angle, the rear angle and the chamfers on the two sides, the cutting force is optimized, the cutting efficiency is guaranteed, and saw tooth damage caused by too large cutting force is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to alloy saw blade technical field especially, it relates to a single particle hard alloy reciprocating saw blade. BACKGROUND

[0002] Reciprocating saw blade is a cutting tool specially designed for reciprocating saws (also known as curve saws, swing saws or simply saws). This kind of saw blade can perform fast forward and backward reciprocating motion, thereby achieving effective cutting of materials. They are widely used in construction, metalworking, woodworking and automotive repair industries.

[0003] In the related art, when cutting aluminum alloy or metal pipe, the ordinary reciprocating saw blade has many broken teeth after working for a short time, which leads to the decline of the overall cutting performance of the saw blade, affects the subsequent cutting operation, and has poor wear resistance and cutting performance. Therefore, we propose a single particle hard alloy reciprocating saw blade.

[0004] The above information disclosed in this background section is only used to understand the background technology of the present inventive concept, and therefore, it can contain information that does not constitute prior art. INVENTION CONTENTS

[0005] The utility model discloses a single particle hard alloy reciprocating saw blade to solve the ordinary reciprocating saw blade in the background art mentioned above when cutting aluminum alloy or metal pipe, the saw blade has many broken teeth after working for a short time, which leads to the decline of the overall cutting performance of the saw blade, affects the subsequent cutting operation, and has poor wear resistance and cutting performance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A single particle hard alloy reciprocating saw blade, comprising a saw body, a saw tooth welded on the upper end of the saw body, and a double-sided chamfer provided on both sides of the upper end of the saw tooth,

[0008] The upper end of the saw body is equally spaced resistance welded with multiple groups of saw teeth, and the saw teeth comprise double-sided chamfers symmetrically arranged on both sides of the upper end;

[0009] The front end of the saw tooth is provided with a rake angle, and the second included angle between the rake angle and the Y-axis is set to 0°-10°, the upper end of the saw tooth is provided with a relief angle, and the first included angle between the relief angle and the X-axis is set to 0°-30°;

[0010] The double-side chamfer is arranged at the upper end side of the saw tooth, and is obtained by cutting a cutting surface composed of a side vertex A1, a vertex A2 and points D1 and D2 of a clearance angle, and the cutting surface is offset along the edge of the lower end of the vertex A1 and the vertex A2, wherein the distance between the point D1 and the point A1 is L1, and the distance between the point D2 and the point A2 is L2.

[0011] In some embodiments, the lengths of the L1 and the L2 are separately arranged, the lengths of the L1 and the L2 range from 0 mm to 0.3 mm, the included angle between the right end surface of the cutting surface and the end surface of the clearance angle ranges from 0° to 90°, the included angle between the left end surface of the cutting surface and the end surface of the clearance angle ranges from 0° to 90°, and the angles of the two included angles are separately arranged.

[0012] In some embodiments, the saw tooth is formed by single-particle cemented carbide fusion die casting, the saw tooth is connected and fixed with the upper end of the saw body by resistance welding, one end of the saw body is provided with a mounting hole, the mounting hole is a circular mounting hole, and the type of the double-side chamfer includes one or more of a round chamfer, a multi-edge chamfer, a V-shaped chamfer or an irregular chamfer.

[0013] In some embodiments, the single-particle cemented carbide is superfine-particle tungsten carbide cemented carbide, the saw tooth is subjected to tempering treatment after welding, and the pitch of the saw tooth (2) ranges from 6 TPI to 24 TPI.

[0014] The utility model discloses the beneficial effect is:

[0015] The negative clearance angle or zero clearance angle increases the thickness of the cutting edge, improves the strength, reduces the phenomenon of broken edge, the high hardness and high strength characteristics of the cemented carbide material are fully utilized, stress concentration and brittle fracture are avoided, the clearance angle and the double-side chamfer reduce the friction between the saw tooth and the workpiece, reduce the cutting heat and wear, the smooth discharge of the chip further reduces the wear and heat influence of the chip on the saw tooth, the cutting force is optimized through the balance of the clearance angle, the clearance angle and the double-side chamfer, the cutting efficiency is guaranteed, and the saw tooth is damaged due to excessive cutting force, the double-side chamfer reduces the lateral force, and the overall cutting force distribution is optimized, the double-side chamfer increases the transverse stability of the saw tooth, and reduces the vibration in the cutting process, the reduction of vibration significantly prolongs the service life of the saw tooth, the clearance angle and the double-side chamfer jointly promote the smooth discharge of the chip, reduce the wear and heat influence of the chip on the saw tooth, and this further improves the wear resistance and cutting capacity of the saw tooth. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure schematic view of the single-particle cemented carbide reciprocating saw blade is provided for the utility model;

[0017] Figure 2 A saw tooth structure schematic view of the single-particle cemented carbide reciprocating saw blade is provided for the utility model;

[0018] Figure 3 A single particle hard alloy reciprocating saw blade saw tooth side structure schematic diagram of the utility model puts forward;

[0019] Figure 4 A single particle hard alloy reciprocating saw blade front view of the utility model puts forward;

[0020] Figure 5 A single particle hard alloy reciprocating saw blade side view and plan view of the utility model puts forward.

[0021] In the figure: 1 is saw body, 2 is saw tooth, 201 is clearance angle, 202 is rake angle, 203 is double-sided chamfer, 3 is mounting hole, 4 is cutting surface. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the utility model is used, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0024] In the description of the utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Reference Figure 1 、 2 , 3, 4, 5, a single particle hard alloy reciprocating saw blade, comprising saw body 1, saw tooth 2 welded on the upper end of saw body 1 and double-sided chamfer 203 provided on the upper end of saw tooth 2,

[0026] The upper end of saw body 1 is provided with a plurality of groups of saw teeth 2 by resistance welding at equal intervals, and the saw tooth 2 comprises double-sided chamfers 203 symmetrically arranged on the upper end of the saw tooth 2;

[0027] The front end of the sawtooth 2 is provided with a front angle 202, and the angle range of a second included angle between the front angle 202 and the Y-axis is set to 0°-10°; the upper end of the sawtooth 2 is provided with a rear angle 201, and the angle range of a first included angle between the rear angle 201 and the X-axis is set to 0°-30°;

[0028] A double-side chamfer 203 is arranged on the upper end side of the sawtooth 2, and the double-side chamfer 203 is obtained by cutting a cutting surface 4, the cutting surface 4 is composed of a side vertex A1 of the rear angle 201, a vertex A2 and points D1 and D2, and the cutting surface 4 is offset along the edge of the lower end of the vertex A1 and the vertex A2, wherein the distance between the point D1 and the point A1 is L1, and the distance between the point D2 and the point A2 is L2;

[0029] The front angle 202, the rear angle 201 and the double-side chamfer 203 arranged on the sawtooth 2 are matched, so that the overall structural strength of the sawtooth 2 is increased, and when the aluminum alloy or the metal pipe is cut, the situation that the sawtooth 2 is broken is reduced, and the wear resistance and the cutting capacity of the sawtooth 2 are improved.

[0030] As shown in the embodiment of the utility model, Figure 1 , 2 The length of the L1 and the L2 is separately set, the length range of the L1 and the L2 is 0mm-0.3mm, the included angle range between the right side end surface of the cutting surface 4 and the end surface of the rear angle 201 is 0°-90°, the included angle range between the left side end surface of the cutting surface 4 and the end surface of the rear angle 201 is 0°-90°, the angles of the two included angles are separately set, the sawtooth 2 is formed by single particle hard alloy fusion die casting, the sawtooth 2 is connected and fixed with the upper end of the saw body 1 through resistance welding, the sawtooth 2 is formed by fusion die casting in a forming die, and then the saw body 1 is connected and fixed with the sawtooth 2 through resistance welding.

[0031] As shown in the embodiment of the utility model, Figure 1 , 3 One end of the saw body 1 is provided with a mounting hole 3, the mounting hole 3 is a circular mounting hole, the saw blade is fixed on the cutting equipment through the circular mounting hole, the quick replaceable setting of the saw blade is realized, the type of the double-side chamfer 203 includes one or more of a round chamfer, a multi-edge chamfer, a V-shaped chamfer or an irregular chamfer, in addition, the double-side chamfer can also adopt a composite chamfer, and the double-side chamfer also has the ability of strengthening the wear resistance of the sawtooth.

[0032] As shown in the embodiment of the utility model, Figure 1 , 3As shown, the single particle hard alloy adopts ultra-fine particle tungsten carbide hard alloy, and the sawtooth 2 is subjected to tempering treatment after welding. The pitch range of the sawtooth (2) is 6TPI-24TPI. The hard alloy produced by using 0.4 micron ultra-fine particle tungsten carbide has a hardness of 93.5HRA, excellent wear resistance and impact resistance. After welding, the saw blade is subjected to annealing, leveling and straightening, tooth milling, quenching-tempering processes to ensure its performance, and the welding points are polished to remove excess welding slag and ensure the flatness of the weld to avoid damaging the sawtooth.

[0033] In this embodiment, the components are all general standard components or components known to those skilled in the art, and the structure and connection principle thereof can be known by those skilled in the art through technical manuals or through conventional experimental methods. The rake angle 202 is set to 0°-10°, which is a negative rake angle or zero rake angle. This design makes the front end of the sawtooth blunt, and the cutting force is larger, but the strength of the cutting edge is higher. The negative rake angle can make the cutting edge bear greater pressure and reduce the risk of edge collapse during cutting. This is particularly important for cutting hard materials such as aluminum alloy or metal pipes, because hard materials are prone to sawtooth edge collapse. The negative rake angle also helps to form a more stable cutting edge and reduce sawtooth wear. The negative rake angle increases the thickness of the cutting edge, thereby increasing its strength and reducing the edge collapse phenomenon. This design fully utilizes the high hardness and high strength characteristics of the hard alloy material, and can bear greater cutting pressure.

[0034] The relief angle 201 is in the range of 0°-30°, which is a relatively large relief angle 201, which helps to reduce the friction between the sawtooth and the workpiece, thereby reducing the cutting heat and wear. A larger relief angle 201 can improve cutting efficiency, but may weaken the strength of the sawtooth 2. Therefore, the strength and cutting performance need to be balanced by the cooperation of the rake angle 202 and the double-sided chamfer 203. The design of the relief angle 201 reduces stress concentration and disperses pressure during cutting, thereby improving the durability of the sawtooth 2. The relief angle also helps to smoothly discharge the chips, reducing the wear and heat effect of the chips on the sawtooth 2;

[0035] The bilateral chamfer 203 helps to discharge the cutting chip from the cutting area during cutting, reduces the wear of the cutting chip to the saw blade, and increases the lateral stability of the saw blade, reduces the vibration during cutting, and reduces the vibration, which is one of the main reasons for the wear and breakage of the saw blade 2, and reduces the vibration, which can significantly improve the service life of the saw blade; the bilateral chamfer 203 can also reduce the lateral force, optimize the overall cutting force, avoid excessive cutting force, and avoid damage to the saw blade; the geometric design of the bilateral chamfer 203 increases the lateral stability of the saw blade 2 and reduces the deformation phenomenon; the length range of the right angle edge of the chamfer (0.15mm-0.5mm) allows adjustment according to the specific cutting material and conditions to optimize the cutting performance; the bilateral chamfer 203 also helps to improve the chip discharge, reduce the thermal effect and wear of the cutting chip to the saw blade 2, and the included angle between the machined surface of the bilateral chamfer and the X-axis is set to-10°-10°, which can realize the structure layout of the bilateral chamfer at the upper end of the saw blade, which is narrow in front and wide in back or wide in front and narrow in back according to the processing requirements of the saw blade.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A single grain cemented carbide reciprocating saw blade, comprising a saw body (1), a saw tooth (2) welded on the upper end of the saw body (1), and a double-sided chamfer (203) arranged on both sides of the upper end of the saw tooth (2), characterized in that: a plurality of groups of saw teeth (2) are arranged at equal intervals on the upper end of the saw body (1) by resistance welding, and the saw tooth (2) comprises a double-sided chamfer (203) symmetrically arranged on both sides of the upper end; a front angle (202) is arranged at the front end of the saw tooth (2), the second included angle between the front angle (202) and the Y-axis is set to an angle range of 0°-10°, and a back angle (201) is arranged at the upper end of the saw tooth (2), the first included angle between the back angle (201) and the X-axis is set to an angle range of 0°-30°; the double-sided chamfer (203) is arranged on the side surface of the upper end of the saw tooth (2), the double-sided chamfer (203) is obtained by cutting, the cutting surface (4) is composed of a side vertex A1 of the back angle (201), a vertex A2 and points D1 and D2, and the cutting surface (4) is offset along the edge at the lower end of the vertex A1 and the vertex A2, wherein the distance between the points D1 and A1 is L1, and the distance between the points D2 and A2 is L2.

2. A single grain cemented carbide reciprocating saw blade according to claim 1, characterized in that The lengths of L1 and L2 are set individually, the lengths of L1 and L2 are in a range of 0mm-0.3mm, the included angle between the right end surface of the cutting surface (4) and the end surface of the back angle (201) is in a range of 0°-90°, the included angle between the left end surface of the cutting surface (4) and the end surface of the back angle (201) is in a range of 0°-90°, and the angles of the two included angles are set individually.

3. A single grain cemented carbide reciprocating saw blade according to claim 1, characterized in that The saw tooth (2) is formed by single grain cemented carbide fusion die casting, the saw tooth (2) is connected and fixed with the upper end of the saw body (1) by resistance welding, one end of the saw body (1) is provided with a mounting hole (3), the mounting hole (3) is a circular mounting hole, and the type of the double-sided chamfer (203) comprises one or more of a round chamfer, a multi-edge chamfer, a V-shaped chamfer or an irregular chamfer.

4. A single grain cemented carbide reciprocating saw blade according to claim 2, characterized in that The single grain cemented carbide is ultra-fine grain tungsten carbide hard alloy, the saw tooth (2) is subjected to tempering treatment after welding, and the pitch of the saw tooth (2) is in a range of 6TPI-24TPI.

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