A milling cutter disc chip suction air duct system

Abstract

The application discloses a kind of milling cutter disc chip suction air duct systems, including rotary cutter and rotary cutter outer periphery cutter shroud, and ring flow air duct is formed in cutter shroud, and the position of ring flow air duct deviating rotary cutter axle center is communicated with exhaust duct, and rotary cutter is distributed with a plurality of chip suction ports communicating ring flow air duct, and the rotation of rotary cutter drives ring flow in ring flow air duct;It achieves the purpose of accurate chip suction, saves mechanical cost, saves the power consumption of separate chip suction fan, energy saving and environmental protection.

Description

Technical Field

[0001] This invention belongs to the field of metal processing. Background Technology

[0002] In the aluminum processing industry, when milling aluminum ingots, in order to avoid scratches on the machined surface caused by the high-speed flying of chips generated by the milling cutter, a chip suction device needs to be installed near the milling cutter. The common practice is to use a high-pressure fan to extract air at the milling cutter's machining area. This method has problems such as high energy consumption, loud noise from the high-pressure fan, and uneven chip suction. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a milling cutter disc chip suction air duct system, which can improve the chip suction efficiency.

[0004] Technical solution: To achieve the above objectives, the present invention provides a milling cutter head chip suction duct system, comprising a rotary cutter head and a cutter head cover around the rotary cutter head, wherein a circulating air duct is formed inside the cutter head cover, and a discharge pipe is connected to the circulating air duct at a position offset from the axis of the rotary cutter head, and a plurality of chip suction ports connected to the circulating air duct are distributed on the rotary cutter head, wherein the rotation of the rotary cutter head drives the formation of a circulating flow within the circulating air duct.

[0005] Furthermore, it includes two sets of rotary cutter heads, cutter head guards, and drainage pipes; the two rotary cutter heads are arranged opposite each other, and a workpiece translation passage is formed between the two rotary cutter heads arranged opposite each other.

[0006] Furthermore, it includes interconnected conveyor boxes and milling chip collection boxes; a conveyor belt is installed in the conveying cavity inside the conveyor box, and the discharge ends of the two discharge pipes are respectively connected to two vertical drop cylinders. The lower ends of the two drop cylinders are connected to the conveying cavity inside the box. The milling chips falling from the two drop cylinders eventually fall onto the conveyor belt in the conveying cavity. A milling chip collection box with an open top is installed inside the milling chip collection box, and the conveying end of the conveyor belt corresponds to the top of the chip collection box.

[0007] Furthermore, an exhaust box is connected to one side of the milling chip collection box, and a sealed exhaust pipe is connected to the upper end of the exhaust box. Several milling chip filter holes are evenly distributed on the exhaust pipe.

[0008] Furthermore, the outer contour of the rotary cutter head is provided with several cutter inserts, and a cutter head is fixedly installed in each cutter insert. The cutter head includes a cutting end and a tail wing end. Between the cutting end and the tail wing end of the cutter head is a waist seat portion installed in the cutter insert. One side of the waist seat portion forms a chip guide surface. After the waist seat portion of the cutter head is fixedly installed in the cutter insert, a through chip suction port is formed on the side of the waist seat portion near the chip guide surface.

[0009] Furthermore, the chip guide surface extends smoothly from the cutting end to the tail fin end.

[0010] Furthermore, the tail fin of the milling cutter head protrudes from the inner surface of the rotary cutter head, and the tail fin is located in the circulating air duct.

[0011] Furthermore, the cutting end of the milling cutter head protrudes beyond the outer surface of the rotary cutter head.

[0012] Furthermore, an inner ring wall coaxial with the rotary cutter head is fixedly installed inside the cutter head cover, and the circulating air duct is coaxial with the outer ring of the inner ring wall.

[0013] Beneficial effects: The metal chips cut by the cutting ends of each milling cutter head are immediately and continuously drawn into the high-speed circulating gas in the circulating air duct through the chip suction port under the action of the corresponding negative pressure and smooth chip guide surface. This avoids the problem of chips flying outward and scratching the workpiece surface. At the same time, since the chip suction port is located at the cutting end of each milling cutter head, it achieves precise chip suction, which is more uniform and efficient than traditional negative pressure exhaust fans. It also saves mechanical costs and eliminates the power consumption of a separate chip suction fan, making it energy-saving and environmentally friendly.

[0014] Meanwhile, the metal scraps from the discharge ends of the two discharge pipes fall through two vertical drop cylinders. The milling chips falling from the two drop cylinders eventually fall onto the conveyor belt in the conveying chamber, and the conveyor belt continuously transports the scraps to the scrap receiving box for recycling. At the same time, the air centrifugally ejected from the two discharge pipes is finally discharged through several milling chip filter holes evenly distributed on the exhaust pipe, thereby achieving the purpose of efficient scrap collection. Attached Figure Description

[0015] Appendix Figure 1 This is a top-down view of the overall structure of this scheme;

[0016] Appendix Figure 2 For the appendix Figure 1 A three-dimensional schematic diagram;

[0017] Appendix Figure 3 For the appendix Figure 2 Sectional view based on the base;

[0018] Appendix Figure 4 This is an overall schematic diagram of the rotary cutter head, cutter head cover, and drive unit.

[0019] Appendix Figure 5 This is a sectional view of the rotary cutter head and cutter head cover after disassembly.

[0020] Appendix Figure 6 This is a schematic diagram of the rotary cutterhead structure. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] As attached Figures 1 to 6The milling cutter head chip suction air duct system shown includes a rotary cutter head 20, a cutter head cover 3 around the rotary cutter head 20, a motor 15, a gearbox 16, a coupling 18, and an output shaft 21. The motor 15 drives the output shaft 21 through the gearbox 16 and the coupling 18. The output shaft 21 is coaxially and synchronously connected to the rotary cutter head 20. A shaft box 17 is provided outside the output shaft 21. When the motor 15 outputs, it causes the rotary cutter head 20 to rotate at high speed. The cutter head cover 3 is a fixed structure. The outer contour of the cutter head cover 3 can be circular or square. The figure shows a square contour.

[0023] like Figure 5 As shown, a circulating air duct 22 is formed inside the cutter head cover 3. An inner annular wall 23, coaxial with the rotating cutter head 20, is fixedly installed inside the cutter head cover 3. The circulating air duct 22 is coaxial with the outer ring of the inner annular wall 23. A drain pipe 5 is connected to the circulating air duct 22 at a position offset from the axis of the rotating cutter head 20. The drain pipe 5 is specifically connected to the shell of the cutter head cover 3, such as... Figure 4 As shown.

[0024] The rotary cutter head 20 has several chip suction ports 19 connected to the circulating air duct 22, and the chip suction ports 19 extend through the front and rear sides of the rotary cutter head 20; for example Figure 5 The outer contour of the rotary cutter head 20 is provided with several milling cutter inserts 25. Each milling cutter insert 25 contains a fixedly installed milling cutter head 1. In this case, an interference fit process is used, but welding or other methods can also be used for fixed connection. The milling cutter head 1 includes a cutting end 1.1 and a tail wing end 1.2 at both ends. Between the cutting end 1.1 and the tail wing end 1.2 of the milling cutter head 1 is a waist seat portion 1.3 embedded in the milling cutter insert 25. One side of the waist seat portion 1.3 forms a chip guide surface 30. After the waist seat portion 1.3 of the milling cutter head 1 is fixedly embedded in the milling cutter insert 25, a through chip suction port 19 is formed on the side of the waist seat portion 1.3 near the chip guide surface 30. Figure 6 The chip guide surface 30 extends smoothly from the cutting end 1.1 to the tail wing end 1.2; the tail wing end 1.2 of the milling cutter head 1 protrudes from the inner disk surface of the rotary cutter head 20 and is located in the circulating air duct 22; the cutting end 1.1 of the milling cutter head 1 protrudes from the outer disk surface of the rotary cutter head 20; the rotation drive of the rotary cutter head 20 will stir the circulating air duct 22 through the tail wing ends 1.2 of each milling cutter head 1 to form a high-speed circulation. The gas rotating at high speed in the circulating air duct 22 is continuously thrown out through the exhaust pipe 5, which is offset from the axis of the rotary cutter head 20, under the action of centrifugal force, thereby forming a continuous negative pressure in the circulating air duct 22.

[0025] The working principle of automatic chip removal: During the high-speed rotation of the rotary cutter head 20, the cutting ends 1.1 of each milling cutter head 1 protruding from the outer surface of the rotary cutter head 20 mill the surface to be machined on the workpiece 2. At the same time, the tail ends 1.2 of each milling cutter head 1 agitate the circulating air duct 22 to form a high-speed circulation. The gas rotating at high speed in the circulating air duct 22 is continuously thrown out through the exhaust pipe 5, which is offset from the axis of the rotary cutter head 20, under the action of centrifugal force. According to Bernoulli's equation in fluid dynamics, the gas pressure decreases accordingly under high flow velocity, thereby forming a continuous negative pressure in the circulating air duct 22. This negative pressure is transmitted to each chip suction port 19, and thus the chips are removed by each milling cutter head 1. Metal chips cut from the cutting end 1.1 are immediately and rapidly drawn into the high-speed circulating gas in the circulating air duct 22 through the chip suction port 19 under the action of the corresponding negative pressure and the smooth chip guide surface 30. This avoids the problem of chips flying outward and scratching the workpiece surface. At the same time, since the chip suction port 19 is located at the cutting end 1.1 of each milling cutter head 1, it achieves the purpose of precise chip suction, which is more uniform and efficient than the traditional negative pressure exhaust fan. The metal chips entering the circulating air duct 22 rotate synchronously with the high-speed circulation. Finally, the metal chips rotating at high speed in the circulating air duct 22 are continuously thrown out through the discharge pipe 5 under the action of centrifugal force, thereby achieving the purpose of automatic chip suction.

[0026] like Figure 1 and 2 As shown, this scheme includes two sets of rotary cutter heads 20, cutter head guards 3, and drainage pipes 5; the two rotary cutter heads 20 are arranged opposite each other, forming a workpiece translation passage 4 between them. When both rotary cutter heads 20 are rotating at high speed, the workpiece 2 being processed is translated along its length into the workpiece translation passage 4 and continues to move slowly. The cutting ends 1.1 of the milling cutter heads 1 on the two rotary cutter heads 20 mill the two sides of the workpiece 2 being processed; it includes a conveyor box 7 and a chip collection box 10 that are interconnected; as shown Figure 3 A conveyor belt 12 is installed along the length of the conveying chamber 11 inside the conveying box 7. The discharge ends of the two discharge pipes 5 are respectively connected to two vertical drop cylinders 16. The lower ends of the two drop cylinders 16 are connected to the conveying chamber 11 inside the box 7. The milling chips falling from the two drop cylinders 16 eventually fall onto the conveyor belt 12 in the conveying chamber 11. A milling chip collection box 13 with an open top is installed inside the milling chip collection box 10. The end of the conveyor belt 12 corresponds to the top of the chip collection box 13. An exhaust box 9 is connected to one side of the milling chip collection box 10. A sealed exhaust pipe 8 is connected to the upper end of the exhaust box 9. Several milling chip filter holes are evenly distributed on the exhaust pipe 8.

[0027] The working principle of the previous section: Metal chips from the discharge ends of the two discharge pipes 5 fall through two vertical drop cylinders 16. The milling chips falling from the two drop cylinders 16 eventually fall onto the conveyor belt 12 in the conveying chamber 11. The conveyor belt 12 continuously conveys the chips to the chip receiving box 13 for recycling. At the same time, the air centrifugally ejected from the two discharge pipes 5 is finally discharged through several milling chip filter holes evenly distributed on the exhaust pipe 8, thereby achieving the purpose of efficient chip collection.

[0028] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A chip suction air duct system for a milling cutter disc, characterized in that: Includes a rotary cutter head (20) and a cutter head cover (3) around the rotary cutter head (20). A circulating air duct (22) is formed inside the cutter head cover (3). A drain pipe (5) is connected to the circulating air duct (22) at a position off the axis of the rotary cutter head (20). Several chip suction ports (19) connected to the circulating air duct (22) are distributed on the rotary cutter head (20). The rotation of the rotary cutter head (20) drives the circulating air duct (22) to form a circulation. The outer contour of the rotary cutter head (20) is provided with several milling cutter inlay slots (25). Each milling cutter inlay slot (25) is fixedly fitted with a milling cutter head (1). The milling cutter head (1) includes a cutting end (1.1) and a tail wing end (1.2) at both ends. Between the cutting end (1.1) and the tail wing end (1.2) of the milling cutter head (1) is a waist seat (1.3) fitted in the milling cutter inlay slot (25). A chip guide surface (30) is formed on one side of the waist seat (1.3). After the waist seat (1.3) of the milling cutter head (1) is fixedly fitted in the milling cutter inlay slot (25), a through chip suction port (19) is formed on the side of the waist seat (1.3) near the chip guide surface (30). The chip guide surface (30) extends smoothly from the cutting end (1.1) to the tail fin end (1.2). The tail wing end (1.2) of the milling cutter head (1) protrudes from the inner surface of the rotary cutter head (20), and the tail wing end (1.2) is in the circulating air duct (22).

2. The milling cutter disc chip suction air duct system according to claim 1, characterized in that: It includes two sets of rotary cutter heads (20), cutter head guards (3) and drain pipes (5); the two rotary cutter heads (20) are arranged opposite to each other, and a workpiece translation passage (4) is formed between the two rotary cutter heads (20) arranged opposite to each other.

3. The milling cutter disc chip suction air duct system according to claim 2, characterized in that: It includes a conveyor box (7) and a chip collection box (10) that are interconnected; a conveyor belt (12) is provided in the conveyor cavity (11) inside the conveyor box (7), and the discharge ends of the two discharge pipes (5) are respectively connected to two vertical drop cylinders (16). The lower ends of the two drop cylinders (16) are connected to the conveyor cavity (11) inside the box (7). The chips falling from the two drop cylinders (16) eventually fall onto the conveyor belt (12) in the conveyor cavity (11). A chip collection box (13) with an open top is provided inside the chip collection box (10). The end of the conveyor belt (12) corresponds to the top of the chip collection box (13).

4. The milling cutter disc chip suction air duct system according to claim 3, characterized in that: A milling chip collection box (10) is connected to an exhaust box (9) on one side. The exhaust box (9) is connected to a top-sealed exhaust pipe (8) at the upper end. Several milling chip filter holes are evenly distributed on the exhaust pipe (8).

5. The milling cutter disc chip suction air duct system according to claim 4, characterized in that: The cutting end (1.1) of the milling cutter head (1) protrudes from the outer surface of the rotary cutter head (20).

6. The milling cutter disc chip suction air duct system according to claim 5, characterized in that: The cutter head cover (3) is fixedly provided with an inner ring wall (23) coaxial with the rotary cutter head (20), and the circulating air duct (22) is coaxial with the outer ring of the inner ring wall (23).

Images