CN201423549Y - Axial Feed System of Helical Milling Device - Google Patents

Abstract

The utility model discloses an axial feeding system of a spiral hole milling device. The system comprises an air intake valve body; a vent hole is formed on the air intake valve body; the vent hole iscommunicated with a control valve mounted on the air intake valve body; a pressure cavity is formed in the air intake valve body; and the pressure cavity is communicated with the vent hole. The system adopts high pressure gas as a medium to complete the axial feeding action of the spiral hole milling machine. Compared with feeding system of common lead screw, the utility model has the advantagesof high system precision, convenient control and remarkable space conservation.

Description

Axial Feed System of Helical Milling Device

technical field

The utility model relates to a helical hole milling device, in particular to an axial feed system of the helical hole milling device.

Background technique

Now our country is in a period of rapid development of manufacturing technology. As the main basic technology of manufacturing technology, cutting processing has made great progress with the development of manufacturing technology. It has entered the stage of developing high-speed cutting, developing new cutting technology and processing methods, A new stage of development characterized by the provision of a complete set of technologies. Aerospace is one of the most important components of the manufacturing industry and the industry with the most high-tech enrichment. In aviation manufacturing, a large number of parts need to be assembled, and thousands of holes need to be processed. To achieve efficient, high-precision, and high-quality processing of such aviation assembly holes, a new technology is needed to replace the traditional drilling technology. .

Aviation manufacturing equipment design, manufacturing technology and high-strength composite material manufacturing and processing, aluminum-titanium alloys are widely used in the aviation field, and a large number of riveting is required in aviation assembly. Therefore, in the manufacturing process, there will be a large number of holes with different specifications to be processed. The diameter of the hole is generally 6~15mm. In the traditional drilling process, the linear speed of the spindle center is zero, that is, the center of the drill bit does not participate in cutting, and the removal of workpiece material in this central area depends entirely on the downward movement of the drill. It is extruded by the thrust, so the Z-direction force that the drill bit bears during drilling is very large. When processing high-hardness materials such as titanium alloys, rapid wear and failure of the tool is a common phenomenon. In addition, the traditional drilling process is a continuous cutting process, the blade is always in contact with the workpiece, the temperature of the contact surface between the blade and the workpiece is very high during cutting, and the thermal conductivity of titanium alloy is relatively poor. The cutting process leads to the accumulation of temperature, which will also Accelerated tool wear failure leads to a decrease in the quality of the machined surface. In the existing aerospace processing and manufacturing assembly, the drilling process is generally a process of pre-drilling, roughing, and then finishing, removing burrs and improving the processing quality of the holes. Since the size of aerospace workpieces is generally relatively large, this requires that the processing range of the machine tools required for this processing must be large. Existing axial feed systems are hydraulic or lead screw methods, but these methods are only suitable for use on large machine tools.

Contents of the invention

The purpose of the utility model is to overcome the disadvantages of the prior art and provide a portable, high-precision and easy-to-control axial feed system for a helical milling device.

The axial feed system of the spiral milling hole device of the utility model includes an air intake valve body, on which an air exchange hole is opened, and the air exchange hole is connected with a The control valve on the intake valve body communicates with each other, and there is a pressure cavity inside the intake valve body, and the pressure cavity communicates with the ventilation hole.

Advantages of the device of the utility model: the device uses high-pressure gas as a medium to complete the axial feed action of the helical milling machine. It is more precise than the ordinary lead screw warp feeding system, easy to control, and greatly saves space.

Description of drawings

The accompanying drawing is a schematic diagram of the assembly structure of the axial feed system of the helical milling device of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in detail.

The helical milling device of the present utility model as shown in the accompanying drawing comprises cutter autorotation system 12, the fixture system that is made of cutter fixture 2 of cutter 9 and cutter, axial feed system 13, a rotating shaft 3 one ends and described cutter The rotation system 12 is connected and the clamp 2 is sleeved at the other end, and the tool 9 is covered with a frame 1 , which also includes a rotation drive system 11 . The axial feed system 13 of the spiral milling device of the present utility model includes an air intake valve body 8, and the air exchange hole 6 is opened on the air intake valve body 8, and the air exchange hole 6 is connected with an installation The control valve 5 on the intake valve body 8 communicates with each other, and there is a pressure chamber 7 inside the intake valve body 8 , and the pressure chamber 7 communicates with the ventilation hole 6 . The intake valve body 8 is sleeved on the outer sleeve 4 of the tool rotation system 12 and the rotation system casing 10, and the intake valve body 8 is connected with the frame 1 through a connecting sleeve.

The working principle of the utility model device is as follows: the high-pressure gas reaches the pressure chamber through the control valve and the ventilation hole, and under the action of the high-pressure gas, the outer sleeve, the inner sleeve, the shaft, etc. are fed downward, and the shaft of the system is completed. To feed. The control valve is used to control the feed rate by controlling the flow of gas.

Claims (1)

1. the axial feed system of helical milling device, it comprises the air inlet valve body, it is characterized in that: on described air inlet valve body, have air-vent, described air-vent is connected with a control valve that is installed on the described air inlet valve body, have pressure chamber at described air inlet valve inner, described pressure chamber is connected with described air-vent.