TK6916*165/2 CNC offset boring and milling machine
In the field of processing core components for heavy construction machinery, the double-sided precision machining of 20-meter-long, ultra-wide, and ultra-high workpieces has always been an "extreme challenge" within the industry. Traditional equipment either has insufficient processing range or requires multiple clamping and reversing, resulting in low efficiency and a higher risk of coaxiality deviation due to benchmark offset. Especially for core components such as the giant digging arm cylinder body of Excavator Parts and the ultra-long load-bearing beam of Tower Crane Accessories, which have extremely high requirements for machining accuracy and efficiency, ordinary equipment simply cannot handle the task. However, the only TK6916×165/2 CNC face boring and milling machine in the xiangyu baoyuan workshop has successfully overcome this challenge and become the core benchmark showcasing the company's processing strength.
The most obvious advantage of this equipment is its "giant-sized" processing range - up to 23 meters in length, 4 meters in width, and 5 meters in height, combined with a 3×3.5-meter rotating table with a load capacity of 60 tons. Even for extremely heavy components like the thick-walled box of Underground Loader Parts or the long main beam of Aerial Work Vehicle Parts, it can securely support and complete dual-sided synchronous machining. For heavy component processing, such a large travel range means "one-time clamping and complete solution", such as the 20-meter-long load-bearing beam of Tower Crane Accessories, traditional equipment requires segmented processing and multiple turns, which not only takes a lot of time and effort but is also prone to size deviations. This equipment can "handle both ends" without any secondary adjustments, significantly improving processing continuity.
The core competitiveness of this equipment stems from its distinctive face double slide design. There are two 480×540mm square slides on the left and right, arranged face-to-face across a 4-meter rotating table, which can achieve dual-sided synchronous machining and also allow for parallel operations of rough and fine processing. The efficiency is increased by several times compared to traditional single machines. More importantly, this symmetrical layout combined with precise linkage control ensures that the coaxiality is stable at 0.02mm/500mm, which is crucial for cylinder body components in Excavator Parts that require precise hole coordination. Previously, when processing a batch of digging arm cylinder bodies, the customer had extremely high requirements for the coaxiality of the hole system, and the scrap rate of processing with ordinary equipment was high. After switching to this equipment, the scrap rate for batch production was directly controlled below 0.3%, with the hole system coordination being extremely tight.
The powerful cutting ability enables this equipment to easily meet high-intensity processing requirements. The diameter of the boring bar is increased to 160mm, the end of the milling axis reaches 280mm, and the maximum torque is as high as 13000N·m. A 10mm feed depth is effortless with one pass, even for a Φ1200mm large hole. When processing components with deep holes and stepped holes of Underground Loader Parts, there is no need to replace special equipment, and it can complete the processing all at once with its own powerful performance, significantly reducing the time loss in process connection. At the same time, the travel configuration of the equipment is considered "all-round" - the X-axis column can move 16.5 meters, the Y-axis spindle box can rise and fall 4 meters, the Z-axis slide is 1.6 meters, and the W-axis boring shaft is 1.2 meters, covering the processing range for even ultra-deep hole and ultra-long box components.
The configuration of the hydrostatic guide rails further elevates the precision stability of the equipment. In the X, Y, and W directions, a static pressure guide rail design is adopted. The oil film thickness is controlled within 0.01-0.02mm. During startup and shutdown, there is no "rail rubbing" at all. The equipment has extremely strong vibration resistance and wear resistance, and can achieve a stable performance of "no run-out for ten years". This is of great significance for long-term high-intensity processing, even when continuously processing high-strength components such as Excavator Parts, Tower Crane Accessories, Aerial Work Vehicle Parts, and Underground Loader Parts for multiple consecutive days, it can always maintain precise processing accuracy.
The highly automated configuration enables this equipment to achieve an efficient production mode of "running without maintenance at night". Each side is equipped with 60 chain tool magazines, combined with 8 work station accessories, and the automatic tool change can be completed within 40 seconds. The right-angle head, universal angle head, flat turning disk, and other accessories can be flexibly switched. Five-axis processing can complete the entire process in one go, whether it is processing complex irregular structures or internal and external slots, and internal end faces. It can precisely handle all these situations. What's more, the equipment is equipped with Renishaw measuring heads, which can achieve online compensation. After the tool is damaged, it will automatically alarm. Even when there is no one on duty at night, it can still process stably and continuously. The workers can pick up the finished products directly when they arrive at work in the morning, significantly reducing labor costs and improving production capacity.
For Xiangyu Baoyuan, although there is only one TK6916×165/2 CNC face boring and milling machine, it carries the core competitiveness of the company in the field of ultra-large precision processing. It can easily undertake high-difficulty processing orders for various heavy core components such as Excavator Parts, Tower Crane Accessories, Aerial Work Vehicle Parts, and Underground Loader Parts. With its ultra-large range, ultra-high precision, and ultra-high efficiency processing capabilities, it has become the "hard card" for the company to enter the high-end heavy processing market. The existence of this equipment fully demonstrates Xiangyu Baoyuan's profound accumulation in the processing of heavy construction machinery components, and also firmly occupies the advantageous position of ultra-large precision processing in the industry competition.
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