CN218253208U

CN218253208U - Flat tube saw cutting blade

Info

Publication number: CN218253208U
Application number: CN202122993692.2U
Authority: CN
Inventors: 李中伟; 朱张泉; 赵利兴; 冯弢; 吴方杰; 张荣玉; 雷婷; 周垚杰; 孔学良; 吴昊
Original assignee: Zhejiang Hailiang Co Ltd
Current assignee: Zhejiang Hailiang Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-01-10
Anticipated expiration: 2031-11-30

Abstract

The utility model relates to a flat pipe saw cuts blade, including the blade body, blade body upper end is equipped with at least one U type mounting groove, blade body lower extreme is equipped with the edge of a knife, be equipped with the blade on the edge of a knife, edge of a knife and blade are arc, edge of a knife place circular arc diameter is phi 1, edge of a knife place circular arc diameter is phi 2, and phi 1 < phi 2, wherein, 0 < phi 1 < 30 mm, 0 < phi 2 is less than or equal to 30 mm. The utility model discloses set up the blade of blade into convex to reduce the radian of blade, make in cutting process, under certain depth of cut, reduce the area of contact of blade and flat pipe, thereby solve the sunken problem of cutting off in-process blade department.

Description

Flat tube saw cutting blade

Technical Field

The utility model relates to a flat tub of cutting technical field, especially a flat tub of saw cutting blade.

Background

The chipless cutting process of the flat pipe is to scratch a groove with a certain depth on the flat pipe by using a blade, and then clamp the flat pipe through a pressing plate and break the flat pipe. Because some flat pipes, the hole width is great, can reach 10mm, great hole width can cause the holding power of cutting off in-process flat pipe not enough, when the blade cutting flat pipe, the pressure of blade can cause flat pipe incision department to warp, when the deflection is big, can cause the in-process brazing filler metal of brazing to pile up, even flow backward in the collector pipe, cause the hole to block up.

SUMMERY OF THE UTILITY MODEL

The utility model aims to reach the purpose provide a flat tub of saw cutting blade, flat tub of incision department is difficult to sunken and warp, improves the quality of brazing.

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

the flat tube sawing blade comprises a blade body, wherein at least one U-shaped mounting groove is formed in the upper end of the blade body, a blade edge is formed in the lower end of the blade body, a cutting edge is formed in the blade edge, the blade edge and the cutting edge are both arc-shaped, the diameter of an arc where the blade edge is located is phi 1, the diameter of an arc where the cutting edge is located is phi 2, the phi 1 is more than phi 1 and less than 30 mm, and the phi 2 is more than 0 and less than or equal to 30 mm.

Preferably, the two sides of the knife edge are inclined planes, a tangential clearance angle A is formed between the inclined planes on the two sides of the knife edge, and A =18 °.

Preferably, the axial section of the knife edge is isosceles trapezoid.

Preferably, the width of the knife edge is D1, and 0 & lt D1 & lt 6 mm.

Preferably, both sides of the cutting edge are inclined planes, a tangential clearance angle B is formed between the inclined planes on both sides of the cutting edge, and B =22 °.

Preferably, the axial section of the cutting edge is an isosceles triangle.

Preferably, the width of the cutting edge is D2, and 0 < D2 < 0.5 mm.

Preferably, two ends of the blade body are rounded, and the thickness of the blade body is L, wherein L =1.8 mm.

Preferably, the blade body is coated with a protective coating, which is a TiAIN coating.

Preferably, the protective coating has a thickness H =3 μm to 5 μm.

After the technical scheme is adopted, the utility model has the advantages of as follows:

the cutting edge of the blade is set to be arc-shaped, and the radian of the blade is reduced, so that the contact area between the blade and the flat pipe is reduced under a certain cutting depth in the cutting process, and the problem that the cutting edge is sunken in the cutting process is solved. In the cutting process, the flat tube wall is cut off by the cutting edge and is broken in the subsequent process, and when the wall of the cutting tube is shallow, the depth of the recess can be reduced, but the situation that the cutting edge cannot be broken easily occurs; conversely, when the wall of the cutting pipe is deeper, the port can be deepened to be sunken and deformed; the cutting edge of the blade used for cutting is arc-shaped, the radian of the arc and the depth of the cutting edge determine the contact area between the blade and the flat pipe in the cutting process, so that in the cutting process, the depth of the blade body for cutting the pipe wall determines the pressure of the blade body to the pipe, and the deeper the cutting depth is, the greater the pressure is, and the greater the contact area between the blade body and the flat pipe is; according to the solid pressure formula F = P S, the cutting depth is adjusted to smoothly break the flat pipe and is kept unchanged, the pressure of the blade body acting on the flat pipe is constant, namely P, if the pressure born by the flat pipe in the cutting process is reduced, the contact area of the blade and a pipe is required to be reduced, the cutting edge of the blade is set to be arc-shaped, the radian of the blade is reduced, the contact area of the blade and the flat pipe is reduced under a certain cutting depth in the cutting process, and the problem that the cutting edge is sunken is solved. The blade body sets up protective coating, improves the wearability of blade body to the life of extension blade body.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a side view of the present invention;

FIG. 4 is a schematic structural view of a protective coating according to the present invention;

fig. 5 is a schematic view of the flat tube cutting device of the present invention;

fig. 6 is a partially enlarged view of F in fig. 3.

Reference numerals:

1. a blade body; 2. a U-shaped mounting groove; 3. a knife edge; 4. a cutting edge; 5. a protective coating; 6. flat tubes; 7. and (6) chamfering.

Detailed Description

In order to explain the overall concept of the present invention more clearly, the present invention will be further explained with reference to the accompanying drawings and specific embodiments. It is to be understood that the following terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like are used in an orientation or positional relationship relative to one another only as illustrated in the accompanying drawings and are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the device/component so referred to must have a particular orientation or be constructed and operated in a particular orientation and therefore should not be considered as limiting the invention.

A flat tube sawing blade, as shown in fig. 1-6, comprises a blade body 1, wherein at least one U-shaped mounting groove 2 is arranged at the upper end of the blade body 1, a blade 3 is arranged at the lower end of the blade body 1, a blade 4 is arranged on the blade 3, the blade 3 and the blade 4 are both arc-shaped, the diameter of the arc where the blade 3 is located is Φ 1, the diameter of the arc where the blade 4 is located is Φ 2, Φ 1 is less than Φ 2, wherein Φ 1 is greater than 0 and less than 30 mm, and Φ 2 is greater than 0 and less than or equal to 30 mm. In the cutting process, the wall of the flat tube 6 is cut off by the cutting edge 4 and is broken in the subsequent process, and when the wall of the cutting tube is shallow, the depth of the recess can be reduced, but the situation that the edge of the cutting tube cannot be broken easily occurs; conversely, when the wall of the cutting pipe is deeper, the port can be deepened to be sunken and deformed; the cutting edge 4 of the blade body 1 for cutting is arc-shaped, the radian of the arc and the depth of the knife edge 3 determine the contact area between the blade and the flat pipe 6 in the cutting process, so that the depth of the blade body 1 for cutting the pipe wall determines the pressure of the blade body 1 to the pipe in the cutting process, and the deeper the cutting depth, the higher the pressure and the larger the contact area between the blade body 1 and the flat pipe 6; according to a solid pressure formula F = P & ltS & gt, the cutting depth is adjusted to smoothly break the flat pipe 6 and is kept unchanged, the pressure of the blade body 1 acting on the flat pipe 6, namely P, is constant, if the pressure born by the flat pipe 6 in the cutting process needs to be reduced, the contact area of the blade and a pipe needs to be reduced, the cutting edge 4 of the blade is arranged to be arc-shaped, the radian of the blade is reduced, the contact area of the blade and the flat pipe 6 is reduced under a certain cutting depth in the cutting process, and therefore the problem that the cutting edge 3 is sunken in the cutting process is solved.

In order to meet the cutting requirement and facilitate the processing and manufacturing, two sides of the knife edge 3 are provided with inclined planes, and a tangential clearance angle A is formed between the inclined planes on the two sides of the knife edge 3, wherein A =18 degrees. The axial section of the knife edge 3 is isosceles trapezoid. The width of the knife edge 3 is D1, and D1 is more than 0 and less than 6 mm. Both sides of the cutting edge 4 are inclined planes, a tangential clearance angle B is formed between the inclined planes at both sides of the cutting edge 4, and B =22 degrees. The axial section of the cutting edge 4 is an isosceles triangle. The width of the cutting edge 4 is D2, and D2 is more than 0 and less than 0.5 mm. The inclined plane processed by the blade body 1 naturally forms a tangential clearance angle, so that the procedure of grinding the clearance angle is omitted, and the processing is time-saving and labor-saving.

In order to improve the use safety and eliminate potential safety hazards, two ends of the blade body 1 are rounded, the thickness of the blade body 1 is L, and L =1.8 mm. Reduce stress concentration, improve the intensity of blade body 1, the colleague improves mobility, eliminates the internal stress, improves the safety in utilization, and the appearance is more pleasing to the eye.

In order to reduce the abrasion of the blade body 1 and prolong the service life of the blade body 1, the blade body 1 is coated with a protective coating 5, and the protective coating 5 is a TiAIN coating. The thickness of the protective coating 5 is H, and H = 3-5 μm. When the protective coating 5 is too thin, the wear resistance of the insert body 1 is poor, resulting in a low service life of the insert body 1, and when the protective coating 5 is too thick, the protective coating 5 is easily cracked and broken, also affecting the service life of the insert body 1.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. The utility model provides a flat tube saw blade which characterized in that: the cutting blade comprises a blade body, wherein a protective coating is coated on the blade body, the protective coating is a TiAIN coating, at least one U-shaped mounting groove is formed in the upper end of the blade body, a blade edge is formed in the lower end of the blade body, two sides of the blade edge are inclined planes, a tangential clearance angle A is formed between the inclined planes at the two sides of the blade edge, A =18 degrees is formed, the axial section of the blade edge is an isosceles trapezoid, a cutting edge is arranged on the blade edge, two sides of the cutting edge are inclined planes, a tangential clearance angle B is formed between the inclined planes at the two sides of the cutting edge, B =22 degrees, the axial section of the cutting edge is an isosceles triangle, the blade edge and the cutting edge are both arc-shaped, the diameter of an arc where the blade edge is located is phi 1, the diameter of an arc where the cutting edge is located is phi 2, phi 1 is less than phi 2, wherein phi 1 is less than 30 mm, and 0 is less than or equal to phi 2 and less than or equal to 30 mm.

2. The flat tube saw blade of claim 1 wherein: the width of the knife edge is D1, and D1 is more than 0 and less than 6 mm.

3. The flat tube saw blade of claim 2 wherein: the width of the cutting edge is D2, and D2 is more than 0 and less than 0.5 mm.

4. The flattube sawing blade according to claim 1 wherein: the two ends of the blade body are rounded, the thickness of the blade body is L, and L =1.8 mm.

5. The flat tube saw blade of claim 1 wherein: the thickness of the protective coating is H, and H = 3-5 μm.