Ball Screw Application Fields
cnc machine lead screw as the core component to convert rotary motion into high precision linear motion, with high positioning accuracy (≤±0.01mm/1000mm), high transmission efficiency (90%-98%), fast response speed, etc., it is widely used in the linear transmission accuracy and stability have Strict requirements of the scene, become a precision manufacturing and automation equipment "power center".
First, the field of precision machine tools: processing accuracy of the "fixed star"
CNC machine tool feed axis: in the vertical machining centers, horizontal milling machine X/Y/Z axis, ball screw with servo motors to achieve accurate feeding of the worktable. For example, the use of C3 grade ball screws in mold processing machines enables cutting tools to be positioned with an accuracy of ±0.005mm, which meets the demand for precision milling of mold cavities.
Grinding spindle feeding: the grinding wheel feeding mechanism of the surface grinder is driven by ball screws to realize mirror surface machining of workpiece surface roughness Ra≤0.02μm with a minimum feed of 0.001mm, and its backlash is ≤0.002mm, which avoids the dimensional error caused by "empty stroke";
Lathe tool holder drive: CNC lathe tool holder transverse feed using large lead ball screw (lead 10-20mm), in 3000r/min speed to realize the tool holder moving speed up to 60m/min, taking into account the high speed and high precision, to ensure that the taper of shaft parts, thread machining accuracy.
Second, the field of industrial automation: production line efficiency of the "gas pedal"
automated production line handling mechanism: 3C product assembly line of the robotic arm telescopic axis using ball screws, with ± 0.02mm repetitive positioning accuracy handling cell phone motherboards, with the linear guide to achieve 30 times a minute high-frequency action! The average daily handling of workpieces exceeds 100,000 pieces.
Material conveying equipment: the tension adjustment mechanism of the lithium battery pole slitter is fine-tuned by precision ball screws, and the accuracy of the guide reaches C5 level, ensuring that the tension fluctuation of the pole slitter is ≤±1N, and avoiding wrinkles or breakage when slitting.
Packaging Machinery Positioning System: The cross sealing mechanism of the instant noodle packaging machine is driven by ball screws, keeping the sealing edge position error ≤ 0.1mm in 400 times per minute sealing action, with photoelectric sensors to realize the "chasing mark" accuracy ± 0.05mm, to enhance the packaging pass rate to 99.8%.
Third, the field of medical equipment: accurate operation of the "safety lock"
medical imaging equipment: CT scanner examination bed lifting and panning mechanism relies on the ball screw, its smoothness of operation (vibration ≤ 0.01mm / s) can reduce the discomfort of the patient during the examination, the positioning accuracy of ±0.05mm The positioning accuracy is ±0.05mm, which ensures the consistency of layer thickness in tomography.
Surgical Robot: The drilling and positioning axis of the orthopedic surgical robot adopts a silent ball screw (running noise ≤50dB), which, together with the torque feedback system, realizes a surgical precision of ±0.1mm and avoids jittering errors of manual operation.
Rehabilitation equipment: The gait training mechanism of the lower limb rehabilitation robot adjusts the step length (range 300-600mm) by means of ball screws, with a lead error of ≤0.03mm/m, ensuring the accuracy of gait simulation for the patients and assisting in the recovery training of patients with nerve injuries.
Fourth, the aerospace field: the "stabilizer" of extreme environments
Aircraft parts processing: aero-engine blade tongue and groove machining machine tools using high-temperature alloy ball screws (temperature 200 ℃), cutting titanium alloy to withstand the axial force of up to 50kN, but still maintain the positioning accuracy of ±0.003mm It can meet the assembly tolerance requirements of the blade and the wheel disk.
Wind tunnel experimental equipment: the model attitude adjustment mechanism of the high-speed wind tunnel is driven by a ball screw, which realizes the fine adjustment of the model's pitch angle ±0.1° under the impact of the airflow with a wind speed of Mach 5, and the response time is ≤0.1s, ensuring the accuracy of the experimental data.
Satellite unfolding mechanism: The unfolding axis of the satellite solar sail panel adopts lightweight ball screws (made of titanium alloy), which can withstand the drastic temperature change from - 150℃ to 100℃ in space, and still eliminate the gap through the pre-tightening design, realizing that the error in the position of the sail panel unfolding is ≤1mm, which guarantees the efficiency of energy collection.
Five, other characteristics of the field
Semiconductor manufacturing: wafer lithography machine table drive using ultra-precision ball screws (C1 level accuracy), with air-floating guide, to achieve nanometer positioning (± 3nm), to ensure that the photolithography pattern of the nesting accuracy.
Automobile Manufacturing: The welding robot of the PACK line of new energy vehicle batteries adopts ball screws to adjust the position of the welding torch, and maintains the positional error of the welded joints ≤ 0.05mm during 60 welding operations per minute, so as to improve the hermeticity of the battery packs.
Measuring Instruments: The X/Y/Z-axis drive of the CMM relies on ball screws, with a backlash of ≤0.001mm, which, together with the closed-loop control of the scale, realizes a measuring accuracy of (0.5+L/500)μm (L is the measuring length in mm), meeting the geometric dimension inspection needs of precision parts.
The essence of the application of high precision lead screw is the embodiment of the demand for "high-precision linear transmission" -- whether it is micro-scale chip processing, or macro-field aerospace equipment, the core value lies in the conversion of rotational power into controllable and measurable power. The core value of the lead screw is to transform rotary power into controllable, measurable and repeatable linear motion, and to become a "precision bridge" connecting the power source and the actuator.
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