High-speed milling, in particular, has delivered both in terms of the forces that may be generated during peak operation. Speeds and feeds have traditionally been the emphasis of machine tool operation. However, throughout the production process, higher speeds and quicker feeds can cause ᴀᴄᴄɪᴅᴇɴᴛs in the machining region. When tools collide at fast feed rates, the motor spindles experience strong impact peak forces. The cost to repair or replace a spindle, as well as ʟᴏsᴛ productivity and downtime, can total in the tens of thousands of dollars as a result of the prevalence of spindle ᴅᴀᴍᴀɢᴇ. Additionally, the cutting tool and machine axes are frequently ᴅᴀᴍᴀɢᴇD by these collisions.
The workpiece, using the wrong cutting tool, and machine tool numerical control comᴍᴀɴds are the most common causes of collisions. Various machine tool components can sustain significant ᴅᴀᴍᴀɢᴇ from collisions. Depending on how severe the collision was, the ᴅᴀᴍᴀɢᴇs may cause an instantaneous failure or shorten the components’ useful lives.
One of the parts of a machine tool most likely to sustain ᴅᴀᴍᴀɢᴇ in a collision is the main spindle unit. As seen in Fig. 2, collisions account for 60% of the ᴅᴀᴍᴀɢᴇs to the main spindle unit.
Among the machine spindle parts most impacted by collision forces are rolling element bearings. When the collision forces are too high, the maximum allowable interface pressure is exceeded due to the small contact surface areas between the races and the rolling element, which can deform or harm the races and the rolling element. Additionally, it’s possible that the tool interface and clamping system are broken and require repair.
Collision and ᴅᴀᴍᴀɢᴇ prevention or reduction are both components of current collision protection strategies. The most widely used techniques include processed planning using CAD/CAM systems and CNC simulation, sensor-less and sensor-based electronic systems, and torque- or force-operated mechanical systems. Each tactic has benefits and drawbacks.
Let’s see Collision tools CNC Working Crash Fail Compilation – Setup CAM CNC Fail in the ᴀᴡᴇsome video below.
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