CN220591764U - Light reciprocating saw blade - Google Patents
Light reciprocating saw blade Download PDFInfo
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- CN220591764U CN220591764U CN202322189995.8U CN202322189995U CN220591764U CN 220591764 U CN220591764 U CN 220591764U CN 202322189995 U CN202322189995 U CN 202322189995U CN 220591764 U CN220591764 U CN 220591764U
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- 239000000956 alloy Substances 0.000 claims abstract description 30
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 abstract description 22
- 238000005520 cutting process Methods 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 241000826860 Trapezium Species 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 239000011449 brick Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model relates to a light reciprocating saw blade, which comprises a matrix and a hard alloy tool bit; the base body is provided with a plurality of flutes, tooth seats are arranged between the adjacent flutes, the length of the base body is L, and the part of the base body provided with the hard alloy cutter head is L 1 The method comprises the steps of carrying out a first treatment on the surface of the The width of the matrix is H; l (L) 1 H is less than or equal to 15 percent; the front end of the basal body is of a trapezoid structure; the middle part of the matrix is of a rectangular structure; the narrowing length of the front end of the basal body is L 2 ；L 2 /L 1 Less than or equal to 50 percent; the middle part of the basal body is provided with a triangular wind hole; the connecting parts between two adjacent triangular wind holes form an integral truss structure; the three corners of the wind hole are fillets, and the radius of each fillet is more than or equal to 2 times the thickness of the substrate; the length-width ratio S/b of the hard alloy cutter head is less than or equal to 35 percent;the beneficial effects of the utility model are as follows: the approximate trapezium structure of saw blade and the design of wind hole have reduced the whole area of saw blade, have reduced the friction between saw blade and the cutting object promptly, have reduced the temperature rise of saw blade, and the small aspect ratio of tool bit has increased welding length for the welding is more firm.
Description
Technical Field
The utility model relates to the technical field of saw blades, in particular to a light reciprocating saw blade.
Background
The saw blade is a tool for cutting materials, and is widely used for cutting materials such as wood, metal, building materials and the like. According to the different cutting materials, the cutting machine mainly comprises a woodworking saw blade, a metal saw blade, a stone saw blade, a concrete saw bar and the like. The concrete saw bar is mainly used for cutting concrete and bricks, and the concrete saw bar of the hard alloy tool bit is most commonly applied;
at present, the alloy cutter head saw blade for cutting concrete and bricks has an overall approximately rectangular structure; hollow structures, i.e. structures with air holes, are generally used with lengths of more than 250 mm.
In terms of bit size selection, the aspect ratio of the bit is approximately equal to 1 due to cost pressures. The angle setting of the cutter head has the bias efficiency, so that the service life is generally lower; aspect ratio (S) 1 /b 1 ) The length of the welding line is relatively smaller due to the bigger size, and the cutter head is easy to fall off; the geometrical angle of the cutter head is larger, the sharpness is quickly reduced, and the service life is shorter;
for saw blades with the specification of more than 250mm, although a wind hole structure is adopted, the length-width ratio of the saw blade is larger, and meanwhile, the moment of inertia of each section is larger, so that the saw blade is obviously bent in cutting work, commonly called as soft.
These problems above need to be solved.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a light reciprocating saw blade, and the softening risk of a base body is reduced through the design of the wind hole of the base body; the service life of the cutter head is prolonged by changing the angle of the cutter head, and the welding strength of the cutter head is improved by changing the length-width ratio of the cutter head.
In order to solve the problems, the utility model adopts the following technical scheme:
a light reciprocating saw blade comprises a matrix and a hard alloy tool bit; the matrix is strip-shaped; the lower surface of the base body is provided with a plurality of flutes, the flutes are uniformly distributed along the lower surface of the base body, tooth holders are arranged between adjacent flutes, and the hard alloy cutter head is welded on the side wall of the tooth holders; the base body is provided with a fixing part;
the length of the base body is L, and the length of the part of the base body provided with the hard alloy cutter head is L 1 The method comprises the steps of carrying out a first treatment on the surface of the The width of the matrix is H; l (L) 1 /H≤15%；
The front end of the basal body is of a trapezoid structure; the middle part of the matrix is of a rectangular structure;
the width of the front end of the base body is smaller than that of the fixing part;
the narrowing length of the front end of the basal body is L 2 ；L 2 /L 1 ≤50%。
Further, the tooth holder is in a form of a gamma; the carbide tool bit is welded with two side walls of the shape.
Further, the chip groove is n-shaped inclined towards the right lower side; the transverse side of the L-shaped is connected with the left side of the U-shaped; one side surface of the hard alloy cutter head is flush with the left side edge of the inverted U-shaped chip flute.
Further, a plurality of triangular air holes are formed in the middle of the base body; the connecting parts between two adjacent triangular wind holes form an integral truss structure;
the ratio of the total width of the solid part to the width H of the matrix is more than or equal to 50% on any section of the wind hole in the length direction of the matrix and in any vertical length direction;
the widths of the solid parts at the upper side and the lower side of the wind hole are the same;
spacing L between two adjacent wind holes 3 ≤1.5H；
The three angles of the wind hole are fillets, and the radius of each fillet is more than or equal to 2 times of the thickness T of the substrate.
Further, the length of the hard alloy cutter head is S, and the width of the hard alloy cutter head is b; the aspect ratio S/b of the hard alloy cutter head is less than or equal to 35 percent.
The individual angles of the cemented carbide tips are set as follows,
the front angle of the cutter head is alpha which is more than or equal to 8 degrees and less than or equal to 12 degrees;
the rear angle of the cutter head is beta, beta is more than or equal to 12 degrees and less than or equal to 18 degrees;
the side angle of the cutter head is delta which is more than or equal to 0 degree and less than or equal to 2 degrees;
the rear angle of the cutter head side is theta which is more than or equal to 0 degree and less than or equal to 3 degrees;
the radius r of the cutter head blade part is more than or equal to 0.1mm and less than or equal to 0.5mm.
Further, the flute has an approximately rectangular structure, and the length of the flute is S 1 ，3mm≤S 1 Less than or equal to 6.5mm; the depth of the flute is b1, the depth ratio S 1 / b1≥1.25。
Further, the thickness of the hard alloy cutter head is T 1 The method comprises the steps of carrying out a first treatment on the surface of the The blade backlash was 0.5× (T 1 T) and the backlash is not less than 0.3mm.
The beneficial effects of the utility model are as follows:
setting a proper length-to-width ratio of the saw blade, the ratio of the length to the width of the working portion of the saw blade (L 1 H) is less than or equal to 15 percent; according to the equal stiffness theory, the rectangular structure is improved to be similar to a trapezoid structure, and the width of the front end of the saw blade is smaller than that of the rear end (connecting part). Narrowing length L 2 , L 2 /L 1 Less than or equal to 50 percent; the integral rigidity of the saw blade is ensured. This is the most fundamental limitation to the deformation of the blade on the premise of normal thickness and hardness of the blade. On the basis, the thickness and the hardness of the saw blade are properly adjusted according to the change; the approximately trapezoidal structure of the saw blade reduces the whole area of the saw blade, namely reduces friction between the saw blade and a cutting object, reduces the temperature rise of the saw blade and reduces energy consumption. Meanwhile, the weight of the saw blade is reduced, and the material consumption is reduced.
The triangular wind hole structure enables saw blade materials to be distributed on two sides, and the working stability of the saw blade is guaranteed. The truss structure formed by the triangular wind holes improves the comprehensive rigidity of the saw blade on the sawing plane, so that the structure is more stable and reliable. The radius of the fillet of the wind hole structure is more than or equal to 2 times of the thickness of the saw blade, so that the stress concentration phenomenon is reduced, and the strength of the saw blade is improved.
The cutting object of the cutter head is brittle materials such as concrete, brick blocks and the like. The cutting work has strong impact vibration to the carbide tool bit, and the main welding mode at present is brazing, and the welding strength of welding seam is lower than that of laser welding, so the length of welding seam must be prolonged to guarantee the welding strength of the tool bit, and the aspect ratio of the tool bit of the application is less than or equal to 35% of S/b, has guaranteed welding strength.
The angle setting of carbide tool bit is the best scheme that obtains through repeated experiments under the principle of improving saw blade life-span under the prerequisite of guaranteeing sharpness. In particular, too small a corner radius r of the blade portion of the blade may cause rapid breakage of the blade, and too large a radius r may affect the sharpness of the blade.
The approximate rectangular chip grooves are adopted, the size is set on the premise of ensuring the strength, the volume of the chip grooves is enlarged, the chip removal times are reduced, and the cutting efficiency is improved; the side gap size ensures smooth discharge of chips, and prevents occurrence of saw clamping phenomenon due to unsmooth chip removal.
Drawings
FIG. 1 is a schematic front view of the structure of the present utility model;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
FIG. 4 is an enlarged view of FIG. 1 at I;
FIG. 5 is a cross-sectional view taken at C-C of FIG. 4;
FIG. 6 is a cross-sectional view taken at D-D of FIG. 4;
fig. 7 is a schematic view of a part of the structure of the substrate.
The reference numerals in the figures illustrate:
1-substrate, 2-wind hole, 3-carbide tool bit, 4-flute, 5-tooth holder, 11-fixed part.
Detailed Description
The drawings in the embodiments of the present utility model will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; the described embodiments are only a few embodiments of the present utility model; but not all embodiments, are based on embodiments in the present utility model; all other embodiments obtained by those of ordinary skill in the art without undue burden; all falling within the scope of the present utility model.
Example 1
As shown in figures 1-7 of the drawings,
a light reciprocating saw blade, which comprises a basal body 1 and a hard alloy tool bit 3; the substrate 1 is in a strip shape; the lower surface of the base body 1 is provided with a plurality of flutes 4, the flutes 4 are uniformly distributed along the lower surface of the base body 1, tooth holders 5 are arranged between adjacent flutes 4, and the hard alloy cutter head 3 is welded on the side wall of the tooth holders 5; the base body 1 is provided with a fixing part 11;
as shown in fig. 1, the front end of the saw blade means the end far from the fixing portion 11; the front end of the base body 1 is triangular, so that the weight of the saw blade can be reduced, and the stress at the two ends of the saw blade is smaller, so that the strength of the saw blade cannot be influenced when the front end is triangular.
The length of the base body 1 is L, and the length of the part of the base body 1 provided with the hard alloy cutter head 3 is L 1 The method comprises the steps of carrying out a first treatment on the surface of the The width of the substrate 1 is H; l (L) 1 /H≤15%；
The front part of the base body 1 is of a trapezoid structure; the middle part of the matrix 1 is of a rectangular structure;
the width of the front end of the base body 1 is smaller than the width of the fixing part 11;
the narrowing length of the front end of the basal body 1 is L 3 ；L 3 /L 1 ≤50%。
As shown in fig. 7, the tooth holder 5 is shaped; the carbide tip 3 is welded to both side walls of the shape. The two side edges are welded, so that the welding length can be increased, and the welding strength is ensured;
as shown in fig. 4, the flute 4 is n-shaped and inclined downward and rightward; the transverse side of the L-shaped is connected with the left side of the U-shaped; one side surface of the cemented carbide chip 3 is flush with the left side edge of the inverted U-shape of the chip flute 4.
The middle part of the base body 1 is provided with a plurality of triangular air holes 2; the connecting parts between two adjacent triangular wind holes 2 form an integral truss structure;
the ratio of the total width of the solid part to the width H of the base body 1 is greater than or equal to 50% on any section of the wind hole 2 in the length direction of the base body 1 and in any vertical length direction;
the widths of the solid parts at the upper side and the lower side of the wind hole 2 are the same;
the distance L3 between two adjacent wind holes 2 is less than or equal to 1.5H;
the three corners of the wind hole 2 are fillets, and the radius of the fillets is more than or equal to 2 times of the thickness T of the substrate 1. The corner of the wind hole 2 can be prevented from cracking by being provided with a round angle;
the triangular wind hole structure enables saw blade materials to be distributed on two sides, and the working stability of the saw blade is guaranteed. The truss structure formed by the wind holes 2 improves the comprehensive rigidity of the saw blade in the sawing plane, so that the structure is more stable and reliable. The radius of the fillet of the wind hole structure is more than or equal to 2 times of the thickness of the saw blade, so that the stress concentration phenomenon is reduced, and the strength of the saw blade is improved;
as shown in fig. 4, the cemented carbide tip 3 has a length S, and the cemented carbide tip 3 has a width b; the aspect ratio S/b of the hard alloy cutter head 3 is less than or equal to 35 percent. The relatively small aspect ratio of the cemented carbide chip 3 is because the object to be cut is a brittle material such as concrete, brick, or the like; the cutting work has strong impact vibration on the hard alloy cutter head 3, the main welding mode at present is hard brazing, and the welding strength of a welding line is lower than that of laser welding, so the welding line length is required to be lengthened so as to ensure the welding strength of the cutter head;
the individual angles of the cemented carbide tips 3 are set as follows,
the front angle of the cutter head is alpha which is more than or equal to 8 degrees and less than or equal to 12 degrees;
the rear angle of the cutter head is beta, beta is more than or equal to 12 degrees and less than or equal to 18 degrees;
the side angle of the cutter head is delta which is more than or equal to 0 degree and less than or equal to 2 degrees;
the rear angle of the cutter head side is theta which is more than or equal to 0 degree and less than or equal to 3 degrees;
the radius of the cutter head blade part is r; r is more than or equal to 0.1 and less than or equal to 0.5.
The angle setting of the carbide tool bit 3 is the best scheme obtained through repeated experiments under the principle of improving the service life of the saw blade on the premise of ensuring sharpness. In particular, too small a corner radius r of the blade portion of the blade may cause rapid breakage of the blade, and too large a radius r may affect the sharpness of the blade.
In the course of the operation of the present utility model,
the air hole 2 on the substrate 1 is punched by a die, so that the efficiency is high, the cost is low, and the method is suitable for mass production;
each angle of the hard alloy cutter head 3 is processed by a grinding wheel on a special gear grinding machine;
the welding of the hard alloy tool bit 3 and the matrix 1 adopts a high-frequency welding mode, so that the welding is firm;
the fixing part and the handle (not shown in the figure) of the base body 1 are arranged on a reciprocating saw (also called a saber saw) through bolts and nuts, so that the concrete material can be sawed, and when sawing is started, excessive pressure is avoided, the saw blade is deformed, and sawing seams are not straight, so that the clamping saw is caused.
Example 3
This embodiment is substantially identical in structure to embodiment 1,
the difference is that,
as shown in figures 4 and 7 of the drawings,
the flute 4 is approximately rectangular, and the length of the flute 4 is S 1 ，S 1 3mm or more and 6.5mm or less; the depth of the flute 4 is b 1 Length to depth ratio S 1 / b 1 And 1.25 or more.
According to the design, the capacity of the chip groove 4 is enlarged on the premise that the strength of the chip groove 4 is ensured, the chip removal times are reduced, and the cutting efficiency is improved.
Example 3
This embodiment is substantially identical in structure to embodiment 1,
the difference is that,
the thickness of the hard alloy cutter head 3 is T 1 ；
The blade backlash was 0.5× (T 1 T) and the backlash is not less than 0.3mm.
The larger side gap size ensures smooth discharge of chips and prevents the phenomenon of clamping saw caused by unsmooth chip removal, but the saw kerf is wide, and if the value of the sawed object is high, the phenomenon of waste exists.
The above; is only a preferred embodiment of the present utility model; the scope of the utility model is not limited in this respect; any person skilled in the art is within the technical scope of the present disclosure; equivalent substitutions or changes are made according to the technical proposal of the utility model and the improved conception thereof; are intended to be encompassed within the scope of the present utility model.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present utility model, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. A light reciprocating saw blade, which is characterized by comprising a base body (1) and a hard alloy tool bit (3); the substrate (1) is strip-shaped; the lower surface of the base body (1) is provided with a plurality of flutes (4), the flutes (4) are uniformly distributed along the lower surface of the base body (1), tooth holders (5) are arranged between adjacent flutes (4), and the hard alloy cutter head (3) is welded on the side wall of the tooth holders (5); the base body (1) is provided with a fixing part (11);
the length of the base body (1) is L, and the length of the part of the base body (1) provided with the hard alloy cutter head (3) is L 1 The method comprises the steps of carrying out a first treatment on the surface of the The width of the substrate (1) is H; l (L) 1 /H≤15%；
The front end of the base body (1) is of a trapezoid structure; the middle part of the matrix (1) is of a rectangular structure;
the width of the front end of the base body (1) is smaller than the width of the fixing part (11);
the narrowing length of the front end of the basal body (1) is L 3 ；L 3 /L 1 ≤50%。
2. A lightweight reciprocating saw blade as defined in claim 1, wherein: the tooth holder (5) is in a shape of a half-wave; the hard alloy cutter head (3) is welded with two side walls of the shape.
3. A light-duty reciprocating saw blade according to claim 2, characterized in that the flutes (4) are n-shaped inclined downwards to the right; the transverse side of the L-shaped is connected with the left side of the U-shaped; one side surface of the hard alloy cutter head (3) is flush with the left side edge of the inverted U-shaped chip flute (4).
4. A light weight reciprocating saw blade as defined in claim 3, wherein,
a plurality of triangular air holes (2) are formed in the middle of the base body (1); the connecting parts between two adjacent triangular wind holes (2) form an integral truss structure;
the ratio of the total width of the solid part to the width H of the base body (1) is greater than or equal to 50% on any section of the wind hole (2) in the length direction of the base body (1) in the vertical length direction;
the widths of the solid parts at the upper side and the lower side of the wind hole (2) are the same;
the distance L3 between two adjacent wind holes (2) is less than or equal to 1.5H;
the three corners of the wind hole (2) are fillets, and the radius of the fillets is more than or equal to 2 times the thickness T of the substrate (1).
5. A lightweight reciprocating saw blade as defined in claim 4, wherein: the length of the hard alloy cutter head (3) is S, and the width of the hard alloy cutter head (3) is b; the aspect ratio S/b of the hard alloy cutter head (3) is less than or equal to 35 percent.
6. A lightweight reciprocating saw blade as defined in claim 5, wherein: the angles of the hard alloy cutter head (3) are set as follows,
the front angle of the cutter head is alpha which is more than or equal to 8 degrees and less than or equal to 12 degrees;
the rear angle of the cutter head is beta, beta is more than or equal to 12 degrees and less than or equal to 18 degrees;
the side angle of the cutter head is delta which is more than or equal to 0 degree and less than or equal to 2 degrees;
the rear angle of the cutter head side is theta which is more than or equal to 0 degree and less than or equal to 3 degrees;
the radius of the cutter head blade part is r; r is more than or equal to 0.1 and less than or equal to 0.5.
7. A lightweight reciprocating saw blade as defined in claim 6, wherein: the chip groove (4) is rectangular, and the length of the chip groove (4) is S 1 Satisfy S of 3-less 1 Less than or equal to 6.5 and mm; the depth of the flute (4) is b 1 The method comprises the steps of carrying out a first treatment on the surface of the Length-to-depth ratio S of the flute (4) 1 / b 1 And 1.25 or more.
8. A lightweight reciprocating saw blade as defined in claim 7, wherein: the thickness of the cutter head (3) is T 1 The method comprises the steps of carrying out a first treatment on the surface of the The blade backlash was 0.5× (T 1 T) and the backlash is not less than 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322189995.8U CN220591764U (en) | 2023-08-15 | 2023-08-15 | Light reciprocating saw blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322189995.8U CN220591764U (en) | 2023-08-15 | 2023-08-15 | Light reciprocating saw blade |
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| Publication Number | Publication Date |
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| CN220591764U true CN220591764U (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322189995.8U Active CN220591764U (en) | 2023-08-15 | 2023-08-15 | Light reciprocating saw blade |
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| CN (1) | CN220591764U (en) |
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- 2023-08-15 CN CN202322189995.8U patent/CN220591764U/en active Active
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