Metal cutting saw blades for high frequency power tools

Abstract

A metal cutting saw blade for high-frequency electric tools is composed of a ladder-tooth cutter head 21 made of metal ceramic, a flat-tooth cutter head 22, and a saw blade base 1. The cutter head is in a regularly raised circular shape around the saw blade; a center hole 11 is provided in the center of the saw blade base. There are four silencer lines 14 evenly distributed along the circumference of the center hole on the saw blade base. Relative to the distance from the center hole, the silencer line 14 is closer to the chip groove 3. The cutter head is composed of a ladder-tooth cutter head (21) and a flat-tooth cutter head (22), which are alternately distributed in the circumferential direction. The distance between the top surface of the ladder-tooth cutter head and the center of the center hole is 0.20 mm greater than the distance between the top surface of the flat-tooth cutter head and the center hole. The ladder-tooth cutter head 21 is followed by a support seat I (51) in the counterclockwise direction, followed by a flat-tooth cutter head 22, which are closely connected through a chip groove A (31), and the flat-tooth cutter head 22 is adjacent to the support seat II (52) in the counterclockwise direction. The front cutting surfaces of the shaving cutter head 21 and the flat-tooth cutter head 22 are planar.

Description

Technical Field

[0001] The invention relates to a metal cutting saw blade for a high-frequency electric tool. Background Art

[0002] High-frequency electric tools have always been very popular in the market, mainly used in decoration and home DIY wood processing. They are rarely used in cutting metal workpieces. The most critical factor is that the cost-effectiveness of the saw blade is not up to standard.

[0003] Conventional high-frequency electric tool metal saw blades are prone to broken teeth and body deformation during the process of cutting metal parts, resulting in a short lifespan. In addition, there are some cases where the cutting is not straight or oblique due to the small chipping of the blade tip during the cutting process, which eventually leads to product scrapping. In addition to the cost-effectiveness factor, another defect of metal saw blades on the market is that the cutting noise is very loud, which has reached the level of harming workers' hearing. Summary of the invention

[0004] The present invention aims to solve the shortcomings of existing metal cutting saw blades such as noise, broken teeth, deformation due to heat during cutting, and non-straight cutting, and proposes a design of a metal cutting saw blade for high-frequency electric tools.

[0005] A metal cutting saw blade for high-frequency electric tools, characterized in that: a center hole 11 is provided in the center of the saw blade base 1. There are four silencer lines 14 evenly distributed along the circumferential direction of the center hole on the saw blade base 1. The silencer lines 14 are in the shape of an "S" written in reverse left and right, and the silencer lines 14 are closer to the chip groove 3 relative to the distance from the center of the circle. The cutter heads distributed around the saw blade are composed of a ladder tooth cutter head 21 and a flat tooth cutter head 22, which are alternately distributed in the outer circumferential direction of the saw blade base 1. The distance between the top surface 211 of the ladder tooth cutter head and the center of the center hole is 0.20 mm greater than the distance between the top surface 221 of the flat tooth cutter head and the center of the center hole. The ladder tooth cutter head 21 is immediately adjacent to the support seat I (51) in the counterclockwise direction, and is adjacent to the flat tooth cutter head 22. They are closely connected through the chip groove A (31), and the flat tooth cutter head 22 is adjacent to the support seat II (52) in the counterclockwise direction. The front cutting surfaces of the ladder-tooth cutter head 21 and the flat-tooth cutter head 22 are planar.

[0006] Arranged in sequence in a counterclockwise direction: closely adjacent to the ladder-tooth cutter head 21 is the top surface 23 of the support seat I, followed by the back surface 323 of the support seat I, followed by the bottom 322 of the chip groove A, followed by the front 321 of the flat-tooth cutter head support seat II, followed by the flat-tooth cutter head 22, followed by the top surface 24 of the flat-tooth cutter head support seat II, as well as the back surface 313 of the flat-tooth cutter head support seat II, the bottom 312 of the chip groove B, and the front 311 of the ladder-tooth cutter head support seat II.

[0007] The silencer line 14 is composed of seven small curves, and the overall shape is an "S" shape written in reverse from left to right. The silencer line 14 is divided into two parts through the center point 1441, and the first part is rotated 180° around the center point 1441 to coincide with the second part. The center point 1441 is located in the middle of the fourth section 144 of the small curve. The first part includes the first section 141 of the small curve, the second section 142 of the small curve, the third section 143 of the small curve, and the upper half of the fourth section 144 of the small curve; the second part includes the lower half of the fourth section 144 of the small curve, the fifth section 145 of the small curve, the sixth section 146 of the small curve, and the seventh section 147 of the small curve. The first section 141 of the small curve has the same shape as the seventh section 147 of the small curve, the third section 143 of the small curve has the same shape as the fifth section 145 of the small curve, and the second section 142 of the small curve has the same shape as the sixth section 146 of the small curve. The overall shape of the second small curve segment 142 and the fourth small curve segment 144 is an acute angle; the overall shape of the fourth small curve segment 144 and the sixth small curve segment 146 is an acute angle.

[0008] The top surface 221 of the flat-tooth cutter head 22 is a plane, which is flush with the top surface 24 of the support seat II, with a height difference of ±0.10 mm.

[0009] The top surface 211 of the trapezoidal cutter head 21 has a first chamfered surface 214 and a second chamfered surface 215 inclined at 45 degrees on both sides. The first chamfered surface 214 and the second chamfered surface 215 have the same inclination angle and the same size, and are symmetrically distributed along the center line of the cutter head.

[0010] The back surface 323 of the support seat I forms an acute angle with the front cutting edge 212 of the trapezoidal cutter head, and the angle is 20°±2°. The back surface 313 of the support seat II forms an acute angle with the front cutting edge 222 of the flat cutter head, and the angle is 20°±2°.

[0011] Preferably, the thickness of the ladder-tooth cutter head 21 and the flat-tooth cutter head 22 in the circumferential direction is the same.

[0012] Preferably, the ladder-tooth cutter head 21 is 0.20 mm longer in radial direction than the flat-tooth cutter head 22 .

[0013] Preferably, the chip groove A (31) and the chip groove B (32) are of the same size, and the width of the chip space in the circumferential direction is 3.5±0.5 mm.

[0014] A silencer line is provided on the saw blade for shock resistance and noise reduction. The silencer line is also called a silencer and anti-seismic groove. It is the prior art in this field, as described in CN201621474071 and CN201621462318.

[0015] During the cutting process, the four silencer lines on the saw blade base 1 can reduce vibrations to solve the noise problem caused by the vibration of the saw blade base. At the same time, the overall embedded design of the cutter head can improve the problem of poor tooth loss caused by welding strength problems during the cutting process. In addition, the spatial optimization design of the chip groove 3 can solve the problem of reasonable chip removal and reduce other adverse reactions caused by the failure to remove metal chips in time. Furthermore, the combination design of the flat-tooth cutter head and the ladder-tooth cutter head can solve the problem of broken teeth caused by cutting foreign objects during the cutting process. At the same time, the reasonable application of the cutter head material is also very critical, laying a solid foundation for the cutting life of the product.

[0016] The beneficial effects of the present invention are: while ensuring the welding strength, the occurrence of tooth chipping, noise, deformation and small chipping can be significantly reduced during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural diagram of the trapezoidal teeth and flat teeth of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below with reference to the accompanying drawings

[0020] A metal cutting saw blade for high-frequency electric tools, characterized in that: a center hole 11 is provided in the center of the saw blade base 1. There are four silencer lines 14 evenly distributed along the circumferential direction of the center hole on the saw blade base 1. The silencer lines 14 are in the shape of an "S" written in reverse left and right, and the silencer lines 14 are closer to the chip groove 3 relative to the distance from the center of the circle. The cutter heads distributed around the saw blade are composed of a ladder tooth cutter head 21 and a flat tooth cutter head 22, which are alternately distributed in the outer circumferential direction of the saw blade base 1. The distance between the top surface 211 of the ladder tooth cutter head and the center of the center hole is 0.20 mm greater than the distance between the top surface 221 of the flat tooth cutter head and the center of the center hole. The ladder tooth cutter head 21 is immediately adjacent to the support seat I (51) in the counterclockwise direction, and is adjacent to the flat tooth cutter head 22. They are closely connected through the chip groove A (31), and the flat tooth cutter head 22 is adjacent to the support seat II (52) in the counterclockwise direction. The front cutting surfaces of the ladder-tooth cutter head 21 and the flat-tooth cutter head 22 are planar.

[0021] Arranged in sequence in a counterclockwise direction: closely adjacent to the ladder-tooth cutter head 21 is the top surface 23 of the support seat I, followed by the back surface 323 of the support seat I, followed by the bottom 322 of the chip groove A, followed by the front 321 of the flat-tooth cutter head support seat II, followed by the flat-tooth cutter head 22, followed by the top surface 24 of the flat-tooth cutter head support seat II, as well as the back surface 313 of the flat-tooth cutter head support seat II, the bottom 312 of the chip groove B, and the front 311 of the ladder-tooth cutter head support seat II.

[0022] The silencer line 14 is composed of seven small curves, and the overall shape is an "S" shape written in reverse from left to right. The silencer line 14 is divided into two parts through the center point 1441, and the first part is rotated 180° around the center point 1441 to coincide with the second part. The center point 1441 is located in the middle of the fourth section 144 of the small curve. The first part includes the first section 141 of the small curve, the second section 142 of the small curve, the third section 143 of the small curve, and the upper half of the fourth section 144 of the small curve; the second part includes the lower half of the fourth section 144 of the small curve, the fifth section 145 of the small curve, the sixth section 146 of the small curve, and the seventh section 147 of the small curve. The first section 141 of the small curve has the same shape as the seventh section 147 of the small curve, the third section 143 of the small curve has the same shape as the fifth section 145 of the small curve, and the second section 142 of the small curve has the same shape as the sixth section 146 of the small curve. The overall shape of the second small curve segment 142 and the fourth small curve segment 144 is an acute angle; the overall shape of the fourth small curve segment 144 and the sixth small curve segment 146 is an acute angle.

[0023] The thickness of the ladder-tooth cutter head 21 and the flat-tooth cutter head 22 in the circumferential direction is the same.

[0024] The length of the ladder-tooth cutter head 21 in the radial direction is 0.20 mm longer than that of the flat-tooth cutter head 22 .

[0025] The top surface 221 of the flat-tooth cutter head 22 is a plane, which is flush with the top surface 24 of the support seat II, with a height difference of ±0.10 mm.

[0026] The top surface 211 of the trapezoidal cutter head 21 has a first chamfered surface 214 and a second chamfered surface 215 inclined at 45 degrees on both sides. The first chamfered surface 214 and the second chamfered surface 215 have the same inclination angle and the same size, and are symmetrically distributed along the center line of the cutter head.

[0027] The chip groove A (31) and the chip groove B (32) are of the same size, and the width of the chip space in the circumferential direction is 3.5±0.5 mm.

[0028] The back surface 323 of the support seat I forms an acute angle with the front cutting edge 212 of the trapezoidal cutter head, and the angle is 20°±2°. The back surface 313 of the support seat II forms an acute angle with the front cutting edge 222 of the flat cutter head, and the angle is 20°±2°.

[0029] The metal cutting saw blade for high-frequency electric tools described in the present invention reasonably collects the iron chips generated during the cutting process through the chip groove B and the chip groove A, and the back 323 of the support seat I presents an acute angle with the front cutting edge 212 of the ladder-tooth cutter head, and the angle is 20°±2°. The back 313 of the support seat II presents an acute angle with the front cutting edge 222 of the flat-tooth cutter head, and the angle is 20°±2°. The stability of the cutting process is achieved, the strength of the tooth part is guaranteed, and broken teeth are prevented. The trapezoidal design of the ladder-tooth cutter head 21 reduces the cutting amount of the rear-edge flat-tooth cutter head 22 and improves the cutting quality. The top surface 221 of the flat-tooth cutter head 22 presents a plane, which is flush with the top surface 24 of the support seat II, with a height difference of ±0.10mm. Sufficient tooth back supports the cutter head to ensure that the cutter head does not break teeth. The noise problem caused by the vibration of the saw blade base during the cutting process is solved by weakening the vibration through the 4 silencer lines on the saw blade base 1. At the same time, the overall embedded design of the cutter head can improve the tooth loss caused by welding strength problems during the cutting process.

[0030] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. A metal cutting saw blade for high frequency electric tools, characterized in that: A center hole (11) is provided at the center of the saw blade base (1); four silencer lines (14) are evenly distributed along the circumference of the center hole on the saw blade base (1); the silencer lines (14) are in an inverted "S" shape, and the silencer lines (14) are closer to the chip groove (3) relative to the distance from the center of the circle; the cutter heads distributed around the saw blade are composed of a ladder tooth cutter head (21) and a flat tooth cutter head (22), which are alternately distributed in the outer circumference direction of the saw blade base (1); the distance between the top surface (211) of the ladder tooth cutter head (21) and the center of the center hole is greater than the distance between the top surface (221) of the flat tooth cutter head (22) and the center of the center hole. .20mm; the ladder-tooth cutter head (21) is adjacent to the support seat I (51) in the counterclockwise direction and is adjacent to the flat-tooth cutter head (22), they are closely connected through the chip groove A (31), and are adjacent to the support seat II (52) behind the flat-tooth cutter head (22) in the counterclockwise direction; the front cutting surfaces of the ladder-tooth cutter head (21) and the flat-tooth cutter head (22) are flat; Arranged in sequence in the counterclockwise direction: the top surface (23) of the support seat I is closely adjacent to the ladder-tooth cutter head (21), followed by the back surface (323) of the support seat I, followed by the bottom of the chip groove A (322), followed by the front surface (321) of the flat-tooth cutter head support seat II, followed by the flat-tooth cutter head (22), followed by the top surface (24) of the flat-tooth cutter head support seat II, and the back surface (313) of the flat-tooth cutter head support seat II, the bottom of the chip groove B (312), and the front surface (311) of the ladder-tooth cutter head support seat II; The silencer line (14) is composed of seven small curves, and the overall shape is an "S" shape written in reverse from left to right; the silencer line (14) is divided into two parts through a center point (1441), and the first part is rotated 180 degrees around the center point (1441) to coincide with the second part; the center point (1441) is located in the middle of the fourth section (144) of the small curve, and the first part includes the first section (141) of the small curve, the second section (142) of the small curve, the third section (143) of the small curve, and the upper half of the fourth section (144) of the small curve; the second section includes the fourth section (144) of the small curve ), the lower half of the small curve section (145), the small curve section (146), and the small curve section (147); the small curve section (141) and the small curve section (147) are of the same shape, the small curve section (143) and the small curve section (145) are of the same shape, and the small curve section (142) and the small curve section (146) are of the same shape; the overall shape of the small curve section (142) and the small curve section (144) is an acute angle; the overall shape of the small curve section (144) and the small curve section (146) is an acute angle; The top surface (221) of the flat-toothed cutter head (22) presents a plane, which is flush with the top surface (24) of the support seat II, with a height difference of ±0.10 mm; A first chamfered surface (214) and a second chamfered surface (215) inclined at 45 degrees are provided on both sides of the top surface (211) of the ladder-tooth cutter head (21); the first chamfered surface (214) and the second chamfered surface (215) have the same inclination angle and the same size, and are symmetrically distributed along the center line of the cutter head; The back surface (323) of the support seat I and the front cutting edge (212) of the trapezoidal tooth cutter head form an acute angle of 20°±2°; the back surface (313) of the support seat II and the front cutting edge (222) of the flat tooth cutter head form an acute angle of 20°±2°.

2. The metal cutting saw blade for high-frequency electric tools according to claim 1, characterized in that: The thickness of the ladder-tooth cutter head (21) and the flat-tooth cutter head (22) in the circumferential direction is the same.

3. The metal cutting saw blade for high-frequency electric tools according to claim 1, characterized in that: The length of the ladder-tooth cutter head (21) in the radial direction is 0.20 mm longer than that of the flat-tooth cutter head (22).

4. The metal cutting saw blade for high frequency electric tool according to claim 1, characterized in that: The chip groove A (31) and the chip groove B (32) are of the same size, and the width of the chip space in the circumferential direction is 3.5±0.5 mm.

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