Saw blade and machining method thereof

Abstract

The invention provides a saw blade and a machining method thereof. The saw blade comprises a saw blade body. Two rows of sawtooth structures are arranged on the cutting side of the saw blade body, and each sawtooth structure comprises a plurality of sawtooth parts which are sequentially arranged in the cutting direction of the cutting side; the two sides of the saw blade body and the sawtooth parts surround to form inwards-concave chip removal spaces, a chip removal notch part is formed between any two adjacent sawtooth parts of the same sawtooth structure, and the chip removal notch parts communicate with the chip removal spaces. According to the saw blade, the chip removal space is formed on the surface of the saw blade in an etching mode, during saw cutting, waste chips can enter the chip removal space through the chip removal notch part, the situation that the waste chips affect reciprocating motion of the sawtooth part is avoided, and therefore the anti-locking effect is achieved; due to the design of the chip removal guide part, the effect of guiding waste chips to be discharged can be achieved through reciprocating movement of the saw blade, and the cutting smoothness is improved; due to the design of the double-row sawtooth parts, the cutting efficiency is improved; the saw-tooth part is large in saw cutting area and high in strength, and the cutting speed can be increased.

Description

Technical Field

[0001] This invention relates to the field of cutting tool technology, and more specifically to a saw blade and its processing method. Background Technology

[0002] A reciprocating saw is a tool that uses a saw blade that moves back and forth to cut materials. An electric saw is one type of saw. It is used to saw wood, metal sheets, pipes, profiles, or to cut bevels on steel pipes. It can also cut cables or other non-metallic materials. It is generally composed of a housing, a motor, a transmission mechanism, and a saw blade. The transmission mechanism converts the torque of the motor into the linear reciprocating motion of the saw blade to achieve cutting.

[0003] In the field of precision saws, the saw blades of precision saws are usually less than 2mm in length of the saw teeth in the cutting direction and less than 0.3mm in thickness. Because the saw blade is thin, the entire saw blade has only a flat shape and no anti-lock function. During cutting, it is easy to lock up because the waste chips accumulate at the cutting position. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and to provide a saw blade and its processing method.

[0005] One embodiment of the present invention provides a saw blade, comprising: a saw blade body; The saw blade body has two rows of saw teeth on its cutting side, and the two rows of saw teeth are arranged side by side. Each saw tooth structure includes multiple saw teeth arranged sequentially along the cutting direction of the cutting side. The saw teeth of the two rows of saw teeth are staggered with each other in the cutting direction of the cutting side, and the saw teeth protrude from the side of the saw blade body. Both sides of the saw blade body are surrounded by the saw teeth to form concave chip removal spaces. A chip removal notch is formed between any two adjacent saw teeth of the same saw tooth structure, and the chip removal notch is connected to the chip removal space.

[0006] In some alternative embodiments, the saw teeth are formed with bosses protruding from the side of the saw blade body, and the chip removal notch is formed between two adjacent bosses of the saw teeth.

[0007] In some alternative embodiments, the bosses of the two rows of saw teeth have cutting surfaces on the side away from each other.

[0008] In some alternative implementations, the height of the boss portion matches the depth of the chip removal space.

[0009] In some alternative embodiments, the boss portion has chip removal guide portions formed on both the front and rear sides in the cutting direction, and the two chip removal guide portions gradually extend toward the chip removal space in a direction close to each other.

[0010] In some alternative embodiments, the chip removal guide is arc-shaped.

[0011] In some alternative embodiments, the chip removal space has a chip removal outlet on the side away from the saw teeth.

[0012] In some alternative embodiments, the saw teeth have chip storage grooves formed on both the front and rear sides in the cutting direction, and the chip removal notch is located between the chip removal grooves of two adjacent saw teeth.

[0013] In some alternative embodiments, the saw blade body has a cutting edge formed on the side away from the cutting side, and the cutting edge is located at the edge of the chip removal space.

[0014] Another embodiment of the present invention provides a saw blade processing method, comprising the following steps: S1: The workpiece is etched to form the outer contour of the saw blade body; S2: Etch a preset area on one side of the workpiece to form a chip removal space in the preset area on one side. S3: Etch a preset area on the other side of the workpiece to form another chip removal space in the preset area on the other side, wherein the edge of the chip removal space away from the serrated part of the workpiece is formed with an oblique portion, so that the edges of the chip removal spaces on both sides of the workpiece are formed together as a cutting edge.

[0015] Compared to existing technologies, the saw blade of this invention forms a chip removal space on its surface through etching. During sawing, waste chips can enter this space through the chip removal notch, preventing them from interfering with the reciprocating motion of the saw teeth and thus preventing jamming. The chip removal guide design utilizes the reciprocating movement of the saw blade to guide the waste chips out, improving cutting smoothness. The double-row saw tooth design improves cutting efficiency and reduces stress concentration. The large sawing area and high strength of the saw teeth contribute to increased cutting speed. The saw blade also has a cutting edge, enhancing its practicality. Of course, the structural design of the saw blade of this invention is not limited to precision saws but can also be applied to saw blades of other sizes.

[0016] To provide a clearer understanding of the present invention, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the saw blade structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of one side of a saw blade according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the sawing side of a saw blade according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the other side of a saw blade according to an embodiment of the present invention; Figure 5 for Figure 4 The enlarged view at point A is shown below; Figure 6 This is a schematic diagram of the saw blade according to another embodiment of the present invention; Figure 7 This is a schematic diagram of one side of a saw blade according to another embodiment of the present invention; Figure 8 for Figure 7 The enlarged view of point B shown.

[0018] Explanation of reference numerals in the attached figures: 10. Saw blade body; 11. Chip removal space; 12. Chip removal notch; 13. Cutting edge; 20. Saw tooth structure; 21. Saw tooth section; 22. Boss section; 23. Cutting surface; 24. Chip removal guide section; 25. Chip removal outlet; 26. Chip storage groove; Detailed Implementation The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 One embodiment of the present invention provides a saw blade, including: a saw blade body 10.

[0020] The saw blade body 10 has two rows of saw tooth structures 20 on its cutting side. The two rows of saw tooth structures 20 are arranged side by side. Each saw tooth structure 20 includes multiple saw tooth portions 21 arranged sequentially along the cutting direction of the cutting side. The saw tooth portions 21 of the two rows of saw tooth structures 20 are staggered with each other in the cutting direction of the cutting side. The saw tooth portions 21 protrude from the side of the saw blade body 10.

[0021] The cutting side of the saw blade body 10 refers to the side used for cutting the object.

[0022] Both sides of the saw blade body 10 are surrounded by the saw teeth 21 to form a concave chip removal space 11. A chip removal notch 12 is formed between any two adjacent saw teeth 21 of the same saw tooth structure 20, and the chip removal notch 12 is connected to the chip removal space 11.

[0023] The working principle of a saw blade according to an embodiment of the present invention is described below: The two rows of interlaced saw teeth 21 are wavy, making the kerf larger than the saw itself, and also increasing the cutting surface area 23, thus improving cutting efficiency. When the saw blade body 10 is cutting an object, some waste chips can be temporarily stored between the two rows of interlaced saw teeth 21, so that the waste chips will not hinder the cutting; moreover, the two-row saw tooth structure 20 helps to reduce the force required by a single row of saw teeth, since a single row of saw teeth structure 20 actually only cuts half of the material in the path, so the cutting efficiency is faster and the cutting efficiency is improved.

[0024] During the cutting process, a cutting gap is formed on the object. The waste chips temporarily stored between the two rows of saw teeth 20, as well as the waste chips generated during the cutting process of the saw teeth 20, can enter the chip removal space 11 through the chip removal notch 12, thereby avoiding the accumulation of waste chips that affect the cutting. Then, the waste chips can be discharged outside the cutting gap through the chip removal space 11. During the reciprocating cutting process, the "pull" action is when the saw blade moves towards the sawing equipment, at which time more material is cut, while the "push" action is when the saw blade moves away from the sawing equipment, at which time less material is cut and basically does not participate in the cutting, but it will push the chips from the chip removal notch 12 into the chip removal space 11. Therefore, the reciprocating cycle can achieve very smooth cutting.

[0025] In addition, the design of the chip removal space 11 can reduce the thickness of the saw blade and reduce the contact area between the saw blade and the structure of the object being cut, which can both increase the chip removal capacity and reduce the friction force on the saw blade.

[0026] In some alternative embodiments, the saw tooth portion 21 is formed with a boss portion 22 protruding from the side of the saw blade body 10, and a chip removal notch portion 12 is formed between the boss portions 22 of two adjacent saw tooth portions 21. The boss portion 22 helps to strengthen the strength of the saw tooth portion 21 and improve the stability of the saw tooth portion 21 during cutting.

[0027] In some alternative embodiments, the bosses 22 of the serrated portions 21 of the two rows of serrated structures 20 are formed with cutting surfaces 23 on the side away from each other. The cutting surfaces 23 of the bosses 22 can also participate in cutting the material, increasing the area of ​​the cutting surfaces 23, which helps to speed up the cutting speed.

[0028] In some alternative embodiments, the height of the boss 22 is matched with the depth of the chip removal space 11. Since the height of the chip removal notch 12 depends on the height of the boss 22, increasing the height of the boss 22 means increasing the cross-section of the chip removal notch, making it easier for waste chips to enter the chip removal space 11 through the chip removal notch 12.

[0029] In some alternative embodiments, the boss portion 22 has chip removal guide portions 24 formed on both the front and rear sides in the cutting direction, and the two chip removal guide portions 24 gradually extend toward the chip removal space 11 in a direction close to each other. The chip removal guide portions 24 can increase strength and reduce stress concentration caused by sharp parts, making the saw tooth portion 21 structure more stable; in addition, during the cutting process, as the saw blade reciprocates, the chip removal guide portions 24 can also guide the waste chips from the chip removal notch portion 12 into the upper chip removal space 11, thereby using the cutting force to guide the chip removal and effectively avoid the accumulation of waste chips.

[0030] In some alternative embodiments, the chip removal guide 24 is arc-shaped, which is more conducive to guiding the smooth movement of waste chips.

[0031] In some alternative embodiments, the chip removal space 11 has a chip removal outlet 25 on the side away from the saw tooth portion 21, through which the waste chips in the chip removal space 11 can be discharged to facilitate stable discharge of waste chips.

[0032] In some alternative embodiments, the saw teeth 21 have chip storage grooves 26 formed on the front and rear sides in the cutting direction. The chip discharge notch 12 is located between the chip discharge grooves of two adjacent saw teeth 21. The chip storage grooves 26 can store some waste chips in advance, thereby increasing the waste chip capacity of the two rows of saw teeth. During the reciprocating movement of the saw blade, the waste chips stored in the chip storage grooves 26 located in front of the chip discharge notch in the cutting direction will enter the chip discharge notch 12, while the chip storage grooves 26 located behind the chip discharge notch in the cutting direction will start to store newly generated waste chips.

[0033] In some alternative embodiments, a cutting edge 13 is formed on the side of the saw blade body 10 away from the cutting side. The cutting edge 13 is located at the edge of the chip removal space 11. The saw blade can perform sawing not only through the two rows of saw teeth 20, but also through the cutting edge 13. In this embodiment, the cutting edge 13 is located at the chip removal outlet 25.

[0034] Another embodiment of the present invention provides a saw blade processing method, applied to the manufacture of a saw blade as described above, comprising the following steps: S1: The workpiece is etched to form the outer contour of the saw blade body 10. S2: Etch a preset area on one side of the workpiece to form a chip removal space 11 in the preset area on one side. S3: Etch a preset area on the other side of the workpiece to form another chip removal space 11 in the preset area on the other side. The edge of the chip removal space 11 away from the serrated portion 21 of the workpiece is formed with an oblique portion, so that the edges of the chip removal spaces 11 on both sides of the workpiece are formed together with a cutting edge 13.

[0035] The saw blade is formed in a simple way. It only requires etching the workpiece with two rows of saw teeth structure 20 that has already been processed to form the corresponding chip removal space 11. Furthermore, the edge of the chip removal space 11 is further etched downwards, so that the edge of the chip removal space 11 forms a bevel. The bevels of the edges of the two chip removal spaces 11 together constitute the cutting edge 13.

[0036] Although embodiments of the invention have been shown and described, those skilled in the art will find that… It is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A saw blade, characterized in that, The saw blade body comprises: a cutting side of the saw blade body is provided with two rows of sawtooth structures arranged side by side, each of the sawtooth structures comprises a plurality of sawtooth portions arranged in sequence along a cutting direction of the cutting side, the sawtooth portions of the two rows of sawtooth structures are staggered with respect to each other in the cutting direction of the cutting side, and the sawtooth portions protrude from the side of the saw blade body; both sides of the saw blade body are surrounded by the sawtooth portions to form an inner recessed chip removal space, and a chip removal gap is formed between any two adjacent sawtooth portions of the same sawtooth structure, and the chip removal gap is in communication with the chip removal space. The sawtooth portion is formed with a boss portion protruding from the side of the saw blade body, and the chip removal gap is formed between the boss portions of two adjacent sawtooth portions.

2. A saw blade according to claim 1, characterized in that: The boss portions of the sawtooth portions of the two rows of sawtooth structures are formed with cutting surfaces on the sides away from each other.

3. A saw blade according to claim 1, characterized in that: The height of the boss portion matches the depth of the chip removal space.

4. A saw blade according to claim 1, characterized in that: The boss portion is formed with a chip removal guide portion on the front side and the rear side in the cutting direction, and the two chip removal guide portions gradually extend toward the chip removal space in the direction close to each other.

5. A saw blade according to claim 1 wherein: The chip removal guide portion is arc-shaped.

6. A saw blade according to claim 5, characterized in that: The chip removal space is formed with a chip removal outlet on the side away from the sawtooth portion.

7. A saw blade according to any one of claims 1 to 6, characterized in that: The sawtooth portion is formed with a chip storage groove on the front side and the rear side in the cutting direction, and the chip removal gap is located between the chip storage grooves of the adjacent two sawtooth portions.

8. A saw blade according to any one of claims 1 to 6, characterized in that: The side edge of the saw blade body away from the cutting side is formed with a blade portion, and the blade portion is located at the edge of the chip removal space.

9. A saw blade according to any one of claims 1 to 6, characterized in that: The method comprises the following steps:

10. A method of saw blade processing for manufacturing a saw blade according to any one of claims 1 to 9, characterized in that S1: etching the workpiece to form the outer contour of the saw blade body; S2: etching a preset area on one side of the workpiece to form a chip removal space on the preset area; S3: etching a preset area on the other side of the workpiece to form another chip removal space on the preset area, wherein the side edge of the chip removal space away from the sawtooth portion of the workpiece is formed with an inclined portion, so that the edges of the chip removal spaces on both sides of the workpiece jointly form a blade portion. ​

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