A powerful five-axis linkage milling head in the form of ab pendulum

Abstract

The invention discloses a powerful five-axis linkage milling head in the form of an AB pendulum, which includes a ram, an A-axis assembly, a B-axis assembly, and a spindle box. The bottom of the spindle box is equipped with a spindle. The A-axis clamping mechanism and the B-axis assembly include the B-axis slewing mechanism and the B-axis clamping mechanism. The A-axis slewing mechanism is used to drive the spindle box to swing left and right. The slewing mechanism is used to drive the spindle housing to swing back and forth, and the B-axis clamping mechanism is used to realize the B-axis clamping action. The AB pendulum type powerful five-axis linkage milling head of the present invention is a highly integrated system integrating mechanical, electrical and hydraulic technologies. It has a compact structure and has the advantages of large torque, high rigidity, and high precision. Processing equipment such as vertical machining centers and horizontal machining centers are especially suitable for the processing of titanium alloy parts in the aerospace field and the processing and friction welding of aluminum alloy parts in the high-speed rail field.

Description

technical field [0001] The invention belongs to the field of five-axis linkage processing, and specifically relates to a powerful five-axis linkage milling head in the form of an AB pendulum, which is especially suitable for processing titanium alloy parts in the aerospace field and processing and friction welding of aluminum alloy parts in the high-speed rail field. Background technique [0002] Since entering the 21st century, the Chinese government has continuously increased investment in strategic projects such as high-speed rail and large aircraft, and has achieved remarkable results. The off-line of CRH380A high-speed train marks that China's high-speed rail is enough to lead the world. The launch of the C919 domestic large aircraft has become a historic turning point in China's economic development. [0003] However, due to the current development status of the domestic machine tool industry, the processing equipment used to process some main structural parts on high...

AI Technical Summary

Problems solved by technology

Under the vigorous support and promotion of the country, the development of domestic five-coordinate CNC machining tools has made great achievements, but the development of key functional components is still relatively lagging behind, especially the universal swing head and other components have always been used by Germany, Japan, the United States, etc. The monopoly of developed countries such as China has seriously restricted the speed of the development of my country's machine tool industry to high-end CNC products.

At present, the universal milling head equipped with five-axis equipment is realized in the form of an externally purchased accessory swinging milling head (AC swinging head). The AC swinging head is independently installed on the end face of the ram, which increases the length of the ram and is limited by the purchased milling head. Due to the size limitation, the overall rigidity is obviously insufficient, so it can only be used for the processing of aluminum alloy parts, which limits the function of the host machine

[0004] A five-axis milling head generally includes a ram, an A-axis assembly, a B-axis assembly, and a spindle assembly. The existing five-axis milling heads have certain deficiencies in terms of torque, rigidity, precision and reliability.

For example, in the support structure of the A-axis slewing mechanism, most manufacturers use the bearing alone support method or the bearing support plus rolling element unloading method, which is not accurate and rigid enough; for the B-axis slewing mechanism, the general manufacturer uses double crossed roller bearings Although the support structure can withstand large axial and radial loads, due to its own structural limitations, it has high requirements for large-scale machining accuracy, assembly technology and process level, and a little carelessness can affect the accuracy of the milling head greater impact

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