Manufacturing method of zigzag fin

Abstract

The invention discloses a manufacturing method of a sawtooth-shaped fin. The manufacturing method comprises the following steps that S1, a metal plate is divided into a plurality of heat exchange fin plates through a cutting machine; s2, the heat exchange fin plate is punched into an n-shaped structure through a punching machine; s3, the punched heat exchange fin plate is cut through a cutting machine, so that the heat exchange fin plate is cut into a centipede-shaped fin plate; s4, the centipede-shaped fin plate obtained after cutting and forming is shaped, and burrs are removed; s5, the centipede-shaped fin plates are arranged in parallel in the horizontal direction, the centipede-shaped fin plates are alternately arranged in an upright mode and an inverted mode, and after the centipede-shaped fin plates are spliced, the centipede-shaped fin plates are welded to form saw-tooth-shaped fins; the saw-tooth-shaped fin manufacturing method has the advantages that the saw-tooth-shaped fin can be manufactured by processing materials with large thickness and high strength, and the manufactured saw-tooth-shaped fin is large in thickness, high in structural strength and good in corrosion resistance; and the manufacturing method is simple, and the manufactured sawtooth-shaped fins are high in precision, good in quality and the like.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchanger fin processing, in particular to a method for manufacturing a serrated fin. Background Art

[0002] At present, in the field of heat exchangers, internal fin heat exchangers or cold plates have been widely used due to their high efficiency and compactness. According to different usage requirements, the internal heat exchange unit fins mainly include straight fins, corrugated fins, serrated fins, and perforated fins. The materials are generally aluminum alloy, stainless steel and copper. The accuracy of the fins directly affects the heat exchange efficiency and reliability and safety performance of the plate-fin heat exchanger; the serrated fins have a simple manufacturing process, a large specific surface area, and high heat transfer efficiency, and have great application potential in the industrial field; Patent Publication No. CN105547033A discloses a serrated fin for a heat exchanger, which specifically discloses a specific serrated fin structure, and the serrated fin preparation is made by continuous stamping of a stamping tool of a wave punching machine, but by Due to the power limitation of the wave machine, the thickness of the fins is generally thinner, the thickness of aluminum fins is generally 0.15-0.5mm; the thickness of stainless steel fins is generally 0.1-0.2mm; the thickness of copper fins is generally 0.1-0.2mm, but in some special applications (such as corrosion environment where corrosion margin needs to be considered), thicker fins (more than 0.5mm) need to be selected, especially when the fin material is stainless steel, titanium alloy and other high-strength materials. Due to the power and structural principle limitations of the wave machine, the traditional wave machine cannot directly punch the metal plate into a serrated fin; therefore, there is a problem that it is impossible to process and prepare serrated fins for materials with larger thickness and higher strength, and the manufactured serrated fins have small thickness, low structural strength, and poor corrosion resistance. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a method for manufacturing serrated fins, which can be used to process materials with larger thickness and higher strength to prepare serrated fins. The manufactured serrated fins have large thickness, high structural strength and good corrosion resistance. The manufacturing method is simple, and the size of the centipede-shaped fin plate can be determined by a formula according to the size requirements of the serrated fins. The manufactured serrated fins have high precision and good quality, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for manufacturing a serrated fin, comprising the following steps:

[0005] S1. Select a metal strip or metal plate with a thickness of 0.5 to 5 mm and cut it into several heat exchange fin plates of the same size by a cutting machine;

[0006] S2. The heat exchange fin plate is punched into a "J"-shaped structure by a punching machine;

[0007] S3, cutting the stamped heat exchange fin plate by a cutting machine, so that the heat exchange fin plate is cut into a centipede-shaped fin plate, and the legs on the left and right sides of the centipede-shaped fin plate are staggered, the bent portion at the bottom of the leg is abutment foot, and the notch after the heat exchange fin plate is cut forms a splicing groove of the centipede-shaped fin plate;

[0008] S4, shaping the centipede-shaped fin plate after cutting and removing burrs;

[0009] S5, arranging the centipede-shaped fin plates in parallel along the horizontal direction, and setting the centipede-shaped fin plates alternately upright and inverted, the legs of the inverted centipede-shaped fin plates are inserted into the splicing grooves of the adjacent upright centipede-shaped fin plates, and welding the centipede-shaped fin plates to form zigzag fins after splicing;

[0010] S6. Shape the serrated fins and remove burrs.

[0011] Furthermore, the specific splicing steps in step S5 are as follows: take a piece of solder foil one, apply glue on the top surface of solder foil one, and bond the centipede-shaped fin plates that are alternately arranged upright and inverted to solder foil one; take another piece of solder foil two, apply glue on the bottom surface of solder foil two, and bond solder foil two to the top surface of the centipede-shaped fin plate that is arranged upright, thereby completing the splicing of the serrated fins.

[0012] Furthermore, according to the size requirements of the serrated fins, the size of the centipede-shaped fin plate can be determined by the following formula:

[0013] f=(3a+0.5+2d) / 4

[0014] e=(a-0.5-2d) / 4

[0015] h=2a-0.5

[0016] Wherein, e is the back length of the centipede-shaped fin plate, f is the length of the centipede-shaped fin plate abutting foot, h is the column width of the centipede-shaped fin plate, a is the pitch of the serrated fin, and d is the thickness of the serrated fin.

[0017] Furthermore, in step S3, the cutting of the heat exchange fin plate is performed by laser cutting or wire cutting.

[0018] Furthermore, the material of the metal plate is any one of copper, aluminum, nickel silver, stainless steel and titanium alloy.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the manufacturing method of the serrated fins is to punch a number of heat exchange fin plates into a "J"-shaped structure by a stamping machine, and then cut the heat exchange fin plates into centipede-shaped fin plates, and then splice and weld the centipede-shaped fin plates to form serrated fins. The manufacturing method is simple and is not limited by the power of the wave machine. It can process materials with larger thickness and higher strength to prepare serrated fins. The manufactured serrated fins have large thickness, high structural strength and good corrosion resistance. Moreover, the size of the centipede-shaped fin plate can be determined by a formula according to the size requirements of the serrated fins, and the manufactured serrated fins have high precision and good quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the heat exchange fin plate after stamping of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the centipede-shaped fin plate of the present invention;

[0022] Figure 3 This is a schematic diagram of the sawtooth fins of the present invention when they are spliced;

[0023] Figure 4 This is a schematic diagram of the structure of the zigzag fin after assembly of the present invention;

[0024] Figure 5 It is a schematic diagram of the explosion of the sawtooth fin and the solder foil 1 and the solder foil 2 of the present invention;

[0025] Figure 6 This is an axonometric view of the sawtooth fin of the present invention;

[0026] Figure 7 It is an axonometric view of the centipede-shaped fin plate of the present invention.

[0027] In the figure: 1. heat exchange fin plate; 2. centipede-shaped fin plate; 21. support leg; 22. splicing groove; 23. abutment foot; 3. serrated fin; 4. solder foil one; 5. solder foil two. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example

[0030] See also Figure 1-7 The present invention provides a technical solution: a method for manufacturing a serrated fin, comprising the following steps:

[0031] S1, select a metal strip or metal plate with a thickness of 0.5 to 5 mm, and cut it into a plurality of heat exchange fin plates 1 of the same size by a cutting machine;

[0032] S2, the heat exchange fin plate 1 is punched into a "J"-shaped structure by a punching machine;

[0033] S3, cutting and processing the stamped heat exchange fin plate 1 by a cutting machine, so that the heat exchange fin plate 1 is cut into a centipede-shaped fin plate 2, and the legs 21 on the left and right sides of the centipede-shaped fin plate 2 are staggered, and the bent portion at the bottom of the leg 21 is the abutment foot 23, and the notch after the heat exchange fin plate 1 is cut forms a splicing groove 22 of the centipede-shaped fin plate 2;

[0034] S4, shaping the centipede-shaped fin plate 2 after cutting and forming, and removing burrs;

[0035] S5, take a piece of solder foil 4, apply glue on the top surface of the solder foil 4, arrange the centipede-shaped fin plates 2 in parallel on the solder foil 4 in the horizontal direction, so that the centipede-shaped fin plates 2 are bonded to the solder foil 4 in an alternating manner of upright and inverted, and the legs 21 of the inverted centipede-shaped fin plates 2 are inserted into the splicing grooves 22 of the centipede-shaped fin plates 2 adjacent to the upright ones, take another piece of solder foil 25, apply glue on the bottom surface of the solder foil 25, and bond the solder foil 25 to the top surface of the upright centipede-shaped fin plates 2 to complete the splicing of the zigzag fins 3; after the centipede-shaped fin plates 2 are spliced, they are welded to form the zigzag fins 3;

[0036] S6. Reshape the serrated fin 3 and remove burrs.

[0037] Furthermore, according to the size requirements of the serrated fins 3, the size of the centipede-shaped fin plate 2 can be determined by the following formula:

[0038] f=(3a+0.5+2d) / 4

[0039] e=(a-0.5-2d) / 4

[0040] h=2a-0.5

[0041] Wherein, e is the back length of the centipede-shaped fin plate 2, f is the length of the abutting foot 23 of the centipede-shaped fin plate 2, h is the row width of the centipede-shaped fin plate 2, a is the pitch of the serrated fin 3, and d is the thickness of the serrated fin 3;

[0042] The width c1 of the splicing groove 22 of the centipede-shaped fin plate 2 is the same as the intercept c of the serrated fin 3, the thickness d1 of the centipede-shaped fin plate 2 is the same as the thickness d of the serrated fin 3, and the height b1 of the centipede-shaped fin plate 2 is the same as the height b of the serrated fin 3;

[0043] Furthermore, in step S3, the cutting of the heat exchange fin plate 1 is performed by laser cutting or wire cutting.

[0044] Furthermore, the material of the metal plate is any one of copper, aluminum, nickel silver, stainless steel and titanium alloy.

[0045] The manufacturing method of the serrated fin disclosed in the present embodiment is to use a punching machine to punch a plurality of heat exchange fin plates 1 into a "J"-shaped structure, and then cut the heat exchange fin plates 1 into centipede-shaped fin plates 2, and then splice and weld the centipede-shaped fin plates 2 to form a serrated fin 3. The manufacturing method is simple and is not limited by the power of the wave machine. The serrated fin 3 can be processed on materials with larger thickness and higher strength. The manufactured serrated fin 3 has large thickness, high structural strength and good corrosion resistance. Moreover, the size of the centipede-shaped fin plate 2 can be determined by a formula according to the size requirements of the serrated fin 3. The manufactured serrated fin 3 has high processing accuracy and good processing quality.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a serrated fin, characterized in that: The following steps are involved: S1. Select a metal strip or metal plate with a thickness of 0.5 to 5 mm and cut it into several heat exchange fin plates of the same size by a cutting machine; S2. The heat exchange fin plate is punched into a "J"-shaped structure by a punching machine; S3, cutting the stamped heat exchange fin plate by a cutting machine, so that the heat exchange fin plate is cut into a centipede-shaped fin plate, and the legs on the left and right sides of the centipede-shaped fin plate are staggered, the bent portion at the bottom of the leg is abutment foot, and the notch after the heat exchange fin plate is cut forms a splicing groove of the centipede-shaped fin plate; S4, shaping the centipede-shaped fin plate after cutting and removing burrs; S5, arranging the centipede-shaped fin plates in parallel along the horizontal direction, and setting the centipede-shaped fin plates alternately upright and inverted, the legs of the inverted centipede-shaped fin plates are inserted into the splicing grooves of the adjacent upright centipede-shaped fin plates, and welding the centipede-shaped fin plates to form zigzag fins after splicing; S6. Shape the serrated fins and remove burrs.

2. The method for manufacturing a serrated fin according to claim 1, characterized in that: The specific splicing steps in step S5 are as follows: Take a piece of solder foil one, apply glue on the top surface of solder foil one, and bond the centipede-shaped fin plates that are alternately set upright and inverted to solder foil one; take another piece of solder foil two, apply glue on the bottom surface of solder foil two, and bond solder foil two to the top surface of the centipede-shaped fin plate that is set upright to complete the splicing of the zigzag fins.

3. The method for manufacturing a serrated fin according to claim 1, characterized in that: According to the size requirements of the serrated fins, the size of the centipede fin plate can be determined by the following formula: f=(3a+0.5+2d) / 4 e=(a-0.5-2d) / 4 h=2a-0.5 Wherein, e is the back length of the centipede-shaped fin plate, f is the length of the centipede-shaped fin plate abutting foot, h is the column width of the centipede-shaped fin plate, a is the pitch of the serrated fin, and d is the thickness of the serrated fin.

4. The method for manufacturing a serrated fin according to claim 1, characterized in that: In step S3, the cutting of the heat exchange fin plate is performed by laser cutting or wire cutting.

5. The method for manufacturing a serrated fin according to claim 1, characterized in that: The material of the metal plate is any one of copper, aluminum, nickel silver, stainless steel and titanium alloy.

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