The key to adjusting industrial equipment such as reducers is to select suitable and interrelated components among them, so that the machine equipment has effective precision and all normal functions during operation.
Therefore, overall, the adjustment of industrial equipment cannot be carried out only after the assembly line of components.
It is important to consider this challenge from the very beginning when analyzing mechanical faults and clearly identifying repair related parts.
The accuracy error of worm gear reducer machine equipment comes from the accuracy of transmission equipment such as reducers, which is specifically manifested in the rotation accuracy of the spindle, the guiding accuracy of the guide rail, and the transmission accuracy of the transmission chain.
1、 The key error source for the rotation accuracy of the reducer spindle is the spindle rotation accuracy, which refers to the axial cylindricity, inner hole cylindricity, and radial shaking size of the components in the front-end development work of the spindle.
The key error sources for spindle rotation accuracy are as follows.
(1) The production and processing error of the spindle is 1) There is a parallelism error between the two motor shafts on the spindle.
2) The spindle taper hole has parallelism error with respect to the motor shaft.
3) The motor shaft has roundness error.
4) The radial precision positioning surface of the rolling bearing has a horizontal error with the centerline of the spindle.
(2) The production and processing error of rolling bearings: 1) There is specification error and roundness error in the middle of the flipped body of the roller bearing; The relative dovetail guide rail of the inner circular hole has axial force; The inner raceway has roundness error; There is parallelism error between the front and rear rolling bearings.
2) Rolling bearings have roundness and parallelism errors in the inner and inner holes; There is a parallelism error between the front and rear rolling bearings; There is a specification error between the rolling bearing hole and the motor shaft.
(3) The production and processing errors of matching parts and the quality of assembly lines: 1) There is roundness error in the rolling bearing holes on the reducer housing; There may be specification errors when the ring is used in conjunction with the rolling bearing; There is a horizontal error between the radial precise positioning of the inner hole and the centerline of the hole.
2) There is an error in the flatness of the inner hole of the nut that clamps and adjusts the clearance between the rolling bearings on the main shaft of the reducer; There is a horizontal error between the center line of the inner hole of the nut and the outer thread base; There are connection errors in the middle of the external thread.
3) There is a flatness error on both sides of the spacer ring of the rolling bearing shaft sleeve.
4) Is it suitable to adjust the clearance of rolling bearings in the assembly line, which immediately poses a significant threat to the accuracy of spindle rotation.
2、 The key error source of guide rail guidance accuracy is the guide rail guidance accuracy, which refers to the accuracy of the trajectory generated by the fitness motion components of industrial equipment when they move along the guide rail for fitness.
The key elements that endanger the guiding accuracy of guide rails, apart from selecting the type, composition, and specifications of guide rails in the design scheme, are generally the following in equipment maintenance: (1) being affected by the geometric accuracy of guide rails.
(2) Is the gap between the guide rails a suitable hazard.
(3) Harm caused by the bending stiffness of the guide rail itself.
3、 The key error source for the transmission accuracy of the gearbox transmission chain is the transmission accuracy, which refers to the level of harm caused by the accuracy of each stage in the transmission chain to the precision and symmetry of the fitness exercise of the terminal equipment.
The transmission chain in general industrial equipment is composed of transmission gears and transmission gears, transmission gears and gear racks, worm gears and worm gears, ball screws and nuts, and other transmission pairs.
In the entire transmission chain, transmission error is transmitted from the input stage of the driving force to the end device, and accumulates according to the reduction ratio.
The transmission accuracy of the transmission chain often poses significant risks to the production and processing errors of CNC machining of external threads and hobbing of transmission gears by gear hobbing machines.
The common source of error in transmission accuracy during the entire process of equipment maintenance is: (1) The error of transmission components poses a critical threat to the transmission accuracy of machine equipment.
(2) The errors in matching parts and the quality of assembly lines have a significant impact on transmission accuracy.
(3) During the operation of transmission components, deformation is inevitable due to heat and pressure, which can also pose certain risks to the transmission accuracy of the transmission chain.
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