Punching the motor parts, the choice of the benchmark is very important!
In the motor parts, the holes of the end cover and the frame are relatively concentrated, including the through hole and the screw hole. The foot hole of the base is related to the installation of the customer. The size and relative position of the hole are very critical. The hole on the end face of the base is related to the installation of the end cover.
In terms of the motor end cover, at least two types of holes are involved, one is a through hole fixed to the base, and the holes are required to ensure that the indexing of each other meets the requirements, and on the other hand, the alignment problem with the frame is ensured. To ensure a beautiful appearance after assembly; another hole in the end cap is a fixed through hole with the bearing cap, these holes ensure their radial positional requirements while ensuring their radial position, as well as with other holes Relative position distribution relationship, this will involve a position control problem of the borehole. If a porous drill or a composite drill is used, as long as the design of the drill is in place, everything is OK, but for large end covers, a composite drill and a porous drill are used. It is not very realistic; when choosing a split mold, it is necessary to take into account the relationship between each other and ensure that the positional relationship of all holes meets the requirements. Well, after a video, Ms. participated in the simple communication of the processing technology requirements of the motor processing parts.
Basic requirements for motor machining parts
●Basic requirements for machining of motor parts: (1) The accuracy of the dimensions, that is, the tolerances and fit of the components. (2) The accuracy of the shape and position of the component, that is, the geometrical tolerance of the component. (3) Surface roughness, which is the degree of smoothness and smoothness of the machined surface. (4) The installation dimensions shall comply with the requirements of the relevant product standards for installation dimensional tolerances, or special requirements of customers.
● Rotary shaft and rotor machining key: (1) The diameter of the iron core of the shaft, the diameter and roughness of the bearing, the outer diameter and roughness of the rotor core, the spacing of the bearing at both ends, the coaxiality of the outer core and the coaxiality of the shaft are all processed. The essential. (2) The shaft should be properly tightly matched with the iron core and the wind blade to ensure that the rotor core and the blade are not loose or turbulent during the operation of the motor. In addition, shaft extension and keyway dimensional tolerances, etc., should meet the requirements of the relevant product standards for mounting dimensional tolerances.
● End cap machining control: (1) dimensional tolerance, cylindricity and roughness of the bearing chamber; this size control is very important because it involves the cooperation with the bearing. (2) Dimensional tolerance, cylindricity and roughness of the stop. The height and diameter of the stop are the key dimensions for mating with the base. A small diameter of the stop may result in a broom. The shallow opening may result in disassembly due to insufficient mating length. (3) The coaxiality between the bearing chamber and the stop. The direct consequence of disagreement is the motor broom, or even the assembly. (4) The jump of the end face to the axis of the stop. (5) The depth from the end face of the port to the bearing chamber.
●The key control points of the machine base processing: (1) conform to the size, position and shape requirements marked by the pattern, wherein the coaxiality between the two ends of the stop and the inner circle, the jump of the two ends of the base facing the axis of the stop is the machine Block processing key. The inner circle and the iron core should have proper tightness to ensure that the stator core is not loose, no turbulence, and can dissipate heat well during motor operation. In addition, the foot plane should be parallel to the axis of the shaft. (2) The distance between the foot hole and the center line of the base should be symmetrical and meet the specified tolerance. That is, we say A, B, C size and center height.
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