CN103801614A - Aluminum pipe mandrel-free grooving device - Google Patents

Abstract

The invention belongs to a grooving device, which is used on various aluminum pipe grooving production lines and can machine a rectangular hole in various aluminum pipes by using a gas-liquid boosting cylinder without a mandrel. The aluminum pipe mandrel-free grooving device is formed by the gas-liquid boosting cylinder, a cutter, a pressure plate, a spring, an upper die, a lower die, a guide shaft and the like; the specific implement mode is that when hydraulic oil fills an upper cavity of the boosting cylinder, a piston rod of the boosting cylinder and the cutter fixedly connected with the piston rod push the upper die to move by the spring so as to press the aluminum pipe. Meanwhile, the hydraulic oil filling the upper cavity of the boosting cylinder also pushes the cylinder body of the gas-liquid boosting cylinder coaxially fixedly connected with the guide shaft to upwards move, the guide shaft drives the lower die to upwards move at the same time, and the upper die and the lower die are respectively fixed on the cylinder body and the piston of the gas-liquid boosting cylinder, so the upper die and the lower die can automatically press the aluminum pipe by taking the axis of the aluminum pipe as the center, and when the upper die and the lower die oppositely move to clamp the aluminum pipe, the cutter continuously moves downwards to finish the grooving process without the mandrel.

Description

Aluminum tube without mandrel grooving device

Technical field:

The invention is a grooving device applied to various aluminum pipe grooving production lines, which can process rectangular hole grooves on various aluminum pipes by using a gas-liquid pressurized cylinder without a mandrel.

Background technique:

Various refrigeration equipments are widely used in production and life, among which various aluminum tubes are provided with a large number of rectangular slots to facilitate the flow of fluid in order to increase the heat dissipation area. Generally, the process of opening a rectangular hole on the effusion aluminum tube is usually completed by stamping with a composite mandrel. Not only is the work efficiency low, but also because of the high stamping force, it is easy to deform the aluminum tube, making it difficult to guarantee the quality. In order to solve this kind of problem, the present invention provides a kind of groove cutting device without mandrel for aluminum pipe, aiming at making rectangular hole groove in aluminum pipe.

Invention content:

At present, in order to open rectangular holes on aluminum tubes, stamping methods with composite mandrels are mostly used. Not only is the work efficiency low, but also the aluminum tube is easily deformed due to the high punching force, which makes it difficult to guarantee the quality. The invention provides an air-conditioner aluminum tube suspension knife grooving device composed of a gas-liquid pressurized cylinder, bolts, a movable pressing block, a spring, an upper die, a lower die, a three-edged cutter and the like. Through the downward movement of the piston of the single air-hydraulic booster cylinder, the driving moving pressing block also moves downward, and pushes the upper mold to be pressed against the upper part of the aluminum tube through the spring, and the piston continues to push the three-edged cutter to move downward and touch the aluminum tube. stand still. Then the gas-hydraulic pressurized cylinder fixedly connected with the lower die drives the lower die to move upward under the action of oil pressure to clamp the pipe. As the oil pressure continues to act, the piston continues to push the three-edged cutter to move downward to complete the machining of the rectangular hole.

Technical solutions:

To process a rectangular hole on the aluminum tube, in order to prevent the deformation of the aluminum tube due to the large punching force, the aluminum tube should be punched after being clamped with a mold. If punching is only performed on one side of the aluminum tube, the clamping die can be designed with one half fixed and the other half movable. However, when the punching process is to be carried out on both sides of the aluminum tube, the clamping dies of the two parts must be designed to be movable in order to fit closely with the aluminum tube. The specific technical solution is that only one air-liquid booster cylinder is used for the punching process of one side of the rectangular hole groove. The piston of the gas-liquid booster cylinder is pushed by the spring to press the upper mold tightly on the upper part of the aluminum tube, and the piston is fixedly connected with the three-edged cutter; the gas-liquid booster cylinder is fixedly connected with the lower mold. Under the action of oil pressure, the piston protrudes downward from the air-hydraulic booster cylinder, pushing the upper mold and the three-edged cutter to move downward, and at the same time, the air-hydraulic booster cylinder will move upward under the action of oil pressure, and is firmly connected with it. The dies that are together will also move upwards. As a result of the relative movement of the upper and lower molds, the aluminum tube is clamped. The oil pressure continues to act, and the piston will continue to push the three-edged cutter to move down to complete the machining of the rectangular hole.

Description of drawings:

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the structure of the present invention.

1. Gas-liquid booster cylinder, 2. Upper cavity of booster cylinder, 3. Piston rod of booster cylinder, 4. Outer frame, 5. Cutter, 6. Press plate,

7. Spring, 8. Upper mold, 9. Aluminum tube, 10. Lower mold, 11. Curved cutting blade, 12. Straight cutting blade,

13. Rectangular groove, 14. Guide shaft, 15. Connecting bolt

Detailed ways:

All kinds of aluminum tubes in refrigeration equipment have a large number of rectangular holes to install fluid channels in order to increase the heat dissipation area. The device adopts an arrangement mode in which the aluminum tube (9) is horizontally fixed, and the outer frame (4) moves along the axial direction of the aluminum tube (9) under the drive of the servo system to perform step-by-step groove cutting. As shown in Figure 1, a rectangular hole (13) is to be processed on the aluminum tube (9). Carry out punching after being clamped with patrix (8). Because the aluminum tube (9) is soft and long, when the aluminum tube (9) is fixed horizontally, its horizontal position is difficult to ensure accurately. Then the lower die (10) and the upper die (8) are all designed to be movable, so that they can automatically float with the position of the aluminum pipe (9) during the grooving process.

The specific embodiment is that the gas-liquid booster cylinder (1) with floating connection is adopted. When the upper chamber (2) of the booster cylinder is filled with hydraulic oil, the piston rod (3) of the booster cylinder is connected with the fixed cutter ( 5) Push the pressing plate (6) to move downward together. When the pressing plate (6) moves downward, the spring (7) will push the upper mold (8) to move together, and make the upper mold (8) press against the aluminum tube (9). At the same time, filling the hydraulic oil in the upper cavity of the booster cylinder (2) will also push the cylinder body of the gas-liquid booster cylinder (1) to move upward, and the cylinder body of the gas-liquid booster cylinder (1) is Guide shaft (14) is fixedly connected together. When the guide shaft (14) moved upwards along with the cylinder block of the gas-hydraulic booster cylinder (1), it also drove the lower die (10) to move upwards together, pressing against the aluminum tube (9). When the upper mold (8) and the lower mold (10) move towards each other, after clamping the aluminum tube (9) together, when filling the hydraulic oil in the upper chamber (2) of the booster cylinder, continue to push the piston rod (3) of the booster cylinder The cutting knife (5) fixedly connected with it moves downward, at this moment, the upper die (8) has been compressed on the aluminum tube (9) and does not move, and the spring (7) continues to be compressed, and the cutting knife (5) Tangential to the aluminum pipe (9), complete the technological process of grooving.

In order to make the cutting knife (5) cut out a rectangular groove on the aluminum tube (9) under as little pressure as possible, the cutting edge of the cutting knife (5) does not adopt the form of the straight line cutting edge (12) commonly used, but adopts the The form of the curved cutting edge (11) obtains a sharper tip with it.

Claims (1)

1. A grooving device without a mandrel for an aluminum tube, which is composed of a gas-liquid pressurized cylinder, a cutter, an upper platen, a spring, an upper template, a lower template, a guide shaft, etc.; it is characterized in that the cutter is fixed on the piston, The upper and lower molds are respectively fixed on the cylinder body and piston of the gas-hydraulic booster cylinder. When the upper cavity of the booster cylinder is filled with hydraulic oil, the upper and lower molds can automatically move toward each other around the axis of the aluminum tube and press against the aluminum tube. The tube, when the aluminum tube is clamped, continues to move downwards to complete the grooving process without mandrel.

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