CN212311036U

CN212311036U - Circular saw blade

Info

Publication number: CN212311036U
Application number: CN201922375640.1U
Authority: CN
Inventors: 廖志荣; 德拉戈斯·阿辛特; 吴冰
Original assignee: NINGBO XIECHENG POWER TOOLS CO Ltd
Current assignee: NINGBO XIECHENG POWER TOOLS CO Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-01-08
Anticipated expiration: 2029-12-25

Abstract

The utility model relates to a circular saw blade, including being the circular shape saw bit body, the central point of saw bit body puts the centre bore of offering the pivot that is used for supplying power saw machine and passes, and the chip groove has been seted up along the circumference interval to the outer peripheral edges of this saw bit body, its characterized in that: the outer periphery of the saw blade body is embedded with a blade at a position corresponding to each chip containing groove, the blades are located at the downstream of the chip containing grooves along the rotating path of the saw blade body, a step for breaking chips is arranged between each blade and each chip containing groove, and the table surface of the step is located on the inner side of the head of the tip end of each blade. Compared with the prior art, the utility model has the advantages of: when the circular saw blade cuts a surface to be processed, chips are formed and then hit the surface of the step to force the surface to be broken in advance and discharged in advance, so that the effects of controlling the curling and breaking of the chips are achieved, the accumulation of the chips is relieved, and the chips accumulated in the chip grooves can be conveniently cleaned subsequently.

Description

Circular saw blade

Technical Field

The utility model relates to a circular saw blade, concretely relates to general circular saw blade of cutting plasticity and brittle material.

Background

The existing electric circular saw blade has a single rake face structure, and when a plastic material (such as metal) or a brittle material (such as wood) with a small cutting thickness is cut, the cutting form of a workpiece is usually continuous cutting, so that the cutting is not easy to break to cause the accumulation of the cutting.

Because the saw blade of the electric circular saw is of a multi-tooth structure, the space of the front tool face is narrow, so that accumulated continuous cutting chips are difficult to discharge, the cutting force is increased in the cutting process, the cutting temperature is increased, the surface of a workpiece is damaged, the abrasion of the saw blade is accelerated, and the electric circular saw is damaged.

For example, chinese utility model patent "circular saw blade" that patent number is CN201320405423.2 (grant publication number is CN203390306U), this circular saw blade includes that piece base and interval set up the sawtooth on the outer circumference of piece base, and the middle part of piece base is equipped with the centre bore, the sawtooth include back of the tooth and tool bit, the back of the tooth between be equipped with the chip groove, the sharp bight part of back of the tooth is equipped with the toothholder of indent, the tool bit welding in the toothholder, back of the tooth and tool bit are half wrapping structure. In the actual cutting process, chips are easy to accumulate in the gap between the tooth back and the cutter head and are difficult to clean, and in addition, the cutting temperature can be increased to a certain extent, so that the abrasion of the saw blade is accelerated.

If the chinese utility model patent No. CN201820122679.5 (No. CN207757013U) is applied to a circular saw blade for cold saw with strengthened cutting edge, the circular saw blade for cold saw with strengthened cutting edge comprises a circular metal saw blade body and a saw-tooth tool bit annularly arranged on the circular metal saw blade body, the saw-tooth tool bit comprises a chip breaker, a main side surface arranged at both sides of the chip breaker, a rear tool surface arranged at the top end of the saw-tooth tool bit, a negative chamfer arranged between the chip breaker and the rear tool surface, a chip separation groove arranged on the rear tool surface and communicated with the negative chamfer, and a front end chamfer arranged between the main side surface and the rear tool surface, wherein the negative chamfer is arranged in an inclined manner, and both ends of the negative chamfer are provided with a transverse front angle. When the circular saw blade in the patent is used for cutting, a main cutting edge formed between a negative chamfer and a chip breaker is firstly contacted with a workpiece to be processed, but the whole surface of the negative chamfer is not contacted, so that the cutting force is in a progressive process, and the cutting vibration force is effectively reduced; however, in the continuous cutting process, chips are easily accumulated and it is difficult to discharge the chips.

Accordingly, further improvements to existing circular saw blades are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem to the current situation of above-mentioned prior art, provide one kind with the smear metal fracture in advance and exhaust circular saw blade.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a circular saw blade, is including being the circular shape saw bit body, the central point of saw bit body puts the centre bore of offering the pivot that is used for supplying the power saw machine and passes, and the chip groove has been seted up along circumference interval to the outer peripheral edges of this saw bit body, its characterized in that: the outer periphery of the saw blade body is embedded with a blade at a position corresponding to each chip containing groove, the blades are located at the downstream of the chip containing grooves along the rotating path of the saw blade body, a step for breaking chips is arranged between each blade and each chip containing groove, and the table surface of the step is located on the inner side of the head of the tip end of each blade.

The steps can be formed in various ways, and can be directly formed on the blade or formed on the saw blade body, but preferably, the outer periphery of the saw blade body is provided with openings at the downstream of the chip grooves, the blade is embedded in the corresponding opening, and the steps are formed between the openings and the chip grooves. Therefore, the chip step can be conveniently acted on the chip to break the chip and discharge the chip immediately.

Specifically, the blade is welded and fixed in the corresponding opening; or the blade is embedded in the corresponding opening in an interference fit mode.

In order to facilitate chip breaking, the table surface of the step is perpendicular to the negative chamfer of the blade, and the head of the tip is positioned on one side of the negative chamfer of the blade. So design, on the one hand the convenience is at the in-process of saw blade work, and the step plays the effect of chip breaking, and on the other hand can play the guide effect when assembling the welding machine for the blade.

In an improved mode, the distance between the table surface of the step and the tip end head of the blade is D, and the distance D is 0.5 mm-1.5 mm. When the distance D is too small, the cutting depth is easy to be insufficient, the cutting efficiency is reduced, and when the distance D is too large, the chip breaking is easy to be delayed, so that the chip breaking effect of the step is weakened.

Preferably, the surface of the chip groove adjacent to the central hole of the saw blade body is a circular arc surface protruding towards the central hole.

Preferably, the two opposite side walls of the chip groove are planes, and the connection part of the planes and the arc surface is in smooth transition, so that the space of the chip groove is increased, the stress concentration of the design structure of the chip groove is reduced, and the mechanical strength of the circular saw blade is enhanced.

Preferably, the radius of the circular arc surface is 0.01 m-0.05 m. When the radius of the circular arc is less than 0.01m, the space of a chip groove is easy to reduce, and when the radius of the circular arc is more than 0.05m, the space of the chip groove is too large, so that the design strength of the circular saw blade is reduced.

Preferably, the saw blade body is provided with an inner groove which is concave towards the direction of the central hole between the back surface of the blade, which is far away from the negative chamfer of the blade, and the chip groove of the adjacent blade, so that the smooth transition design is achieved, and the aim of reducing stress concentration is fulfilled.

Further preferably, one side of the inner groove is connected with the back surface of the blade, and the other side of the inner groove is arranged at intervals with the chip grooves of the adjacent blade, so that the material consumption of the circular saw blade is reduced.

Compared with the prior art, the utility model has the advantages of: the steps for breaking chips are arranged between the blades of the circular saw blade and the respective chip grooves, the steps are positioned on the inner side of the tip heads of the blades, and due to the existence of the chip breaking steps, when the circular saw blade cuts a surface to be processed, chips are formed and then hit on the surfaces of the steps to be broken in advance, so that the chips are forced to be broken in advance and discharged in advance, the effects of controlling the curling and breaking of the chips are achieved, the accumulation of the chips is relieved, and the chips accumulated in the chip grooves can be conveniently cleaned in the follow-up process; in addition, the blade is embedded and fixed on the saw blade body, so that the saw blade body and the blade are made of different metal materials, and the processing cost is greatly reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic perspective exploded view of FIG. 1;

FIG. 4 is an enlarged view of the portion B in FIG. 3;

fig. 5 is a schematic view of the cutting principle of the circular saw blade according to the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, the circular saw blade of the embodiment of the present invention includes a circular saw blade body 1, a central hole 11 for passing a rotating shaft of a power saw is provided at a central position of the saw blade body 1, and chip flutes 5 and inner grooves 12 are provided along a circumferential interval at an outer peripheral edge of the saw blade body 1, an opening 13 is provided at a downstream of each chip flute 5 at an outer peripheral edge of the saw blade body 1, a blade 2 is embedded in the opening 13, the blade is fixed in the corresponding opening 13 by a welding method, or the blade 2 is fixed in the corresponding opening 13 by an interference fit embedding method, that is, the chip flutes are also provided at a downstream of each chip flute 5 at the blade 2. The chip flutes 5 are used for accommodating chips generated on a surface 6 to be machined cut by the insert 2, and a step 3 for breaking chips is arranged between the insert 2 and the respective chip flute 5, specifically, the step 3 is formed between the opening 13 and the chip flute 5, and the step 3 is positioned between the opening 13 and the chip flute 5.

Further, as shown in fig. 2, the distance between the land 31 of the step 3 and the center hole 11 is smaller than the distance between the tip head 21 of the blade 2 and the center hole 11, i.e., the land 31 of the above-mentioned step 3 is located inside the tip head 21 of the blade 2; and the land 31 of the step 3 is perpendicular to the negative chamfer 4 of the insert 2, the tip head 21 is formed on the side of the negative chamfer 4, and the negative chamfer 4 of the insert 2 is the front of the insert 2. The distance D between the surface 31 of the step 3 and the tip end 21 of the blade 2 is 0.5mm to 1.5 mm.

As shown in fig. 2 and 4, two opposite side walls of the chip flute 5 are vertical planes 52, the planes 52 are perpendicular to the table surface 31 of the step 3, the two planes 52 are connected through an arc surface 51, and the connection between the two planes 52 and the arc surface 51 is in smooth transition. The arc surface 51 is a surface of the chip pocket 5 adjacent to the central hole 11 of the saw blade body 1, the arc surface 51 protrudes towards the central hole 11, and the radius of the arc surface 51 is 0.01 m-0.05 m. When the radius of the circular arc is less than 0.01m, the space of a chip groove is easy to reduce, and when the radius of the circular arc is more than 0.05m, the space of the chip groove is too large, so that the design strength of the circular saw blade is reduced.

As shown in fig. 2 and 4, the saw blade body 1 has an inner recess 12 recessed toward the central hole 11 between the back surface of the blade 2 facing away from the negative chamfer 4 and the chip pocket 5 of the adjacent blade 2, one side of the inner recess 12 is connected to the back surface of the blade 2, and the other side of the inner recess 12 is spaced apart from the corresponding chip pocket 5 of the adjacent blade 2.

The circular saw blade in the above embodiment can be used for cutting a surface to be machined 6 of a plastic material (such as metal) or a brittle material (such as wood) with a small cutting thickness, and chips are easy to break, specifically, as shown in fig. 5, the existence of the step 3 can lead the chips to strike the surface of the step 3 after being formed in the cutting process, so that the chips are forced to break in advance to form a machined surface 61, and the chips are discharged in advance, so that the effects of controlling the curling and breaking of the chips, relieving the accumulation of the chips and facilitating the cleaning are achieved.

In addition, the blade in this embodiment adopts the mode of inlaying to install on the periphery edge of saw bit body, makes things convenient for saw bit body 1 and blade 2 to adopt different metal material to make, has avoided the high-cost problem that all adopt the expensive alloy material to bring, is favorable to reducing the whole processing cost of circular saw piece.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a circular saw blade, is including being circular shape saw bit body (1), the central point of saw bit body (1) puts centre bore (11) of offering the pivot that is used for supplying the power saw and passes, and chip groove (5), its characterized in that have been seted up along circumference interval to the outer peripheral edge of this saw bit body (1): blade (2) are all inlayed in the position that corresponds every chip pocket (5) in the outer peripheral edges of saw bit body (1), and along on the rotation path of saw bit body (1), blade (2) are located the low reaches of chip pocket (5) separately, just have step (3) that are used for the chip breaking between blade (2) and respective chip pocket (5), mesa (31) of step (3) are located the inboard of most advanced head (21) of blade (2).

2. The circular saw blade as claimed in claim 1, wherein: the outer peripheral edge of saw bit body (1) is located the low reaches of each chip pocket (5) and has all seted up opening (13), blade (2) are inlayed and are located corresponding opening (13), form foretell step (3) promptly between opening (13) and chip pocket (5).

3. The circular saw blade as claimed in claim 2, wherein: the blades (2) are welded and fixed in the corresponding openings (13); or the blade (2) is embedded in the corresponding opening (13) in an interference fit mode.

4. The circular saw blade as claimed in claim 2, wherein: the table top (31) of the step (3) is perpendicular to the negative chamfer (4) of the blade (2), and the tip head (21) is located on one side of the negative chamfer (4) of the blade.

5. The circular saw blade as claimed in claim 4, wherein: the distance D between the table top (31) of the step (3) and the tip end head (21) of the blade (2) is 0.5-1.5 mm.

6. The circular saw blade as claimed in any one of claims 1 to 5, wherein: the surface of the chip groove (5) adjacent to the central hole (11) of the saw blade body (1) is an arc surface (51) protruding towards the central hole (11).

7. The circular saw blade as claimed in claim 6, wherein: two opposite side walls of the chip groove (5) are both planes (52), and the connecting part of the two planes (52) and the arc surface (51) is in smooth transition.

8. The circular saw blade as claimed in claim 6, wherein: the radius of the arc surface (51) is 0.01-0.05 m.

9. The circular saw blade as claimed in claim 1, wherein: an inner groove (12) which is sunken towards the direction of the central hole (11) is formed between the back surface of the saw blade body (1) which is far away from the negative chamfer (4) of the blade (2) and the chip groove (5) of the adjacent blade (2).

10. The circular saw blade as claimed in claim 9, wherein: one side of the inner groove (12) is connected with the back surface of the blade (2), and the other side of the inner groove (12) is arranged at intervals with the chip grooves (5) of the adjacent blade (2).