Shaft parts

In industrial products, shaft parts are suitable for one or more CNC machined parts maintenance operations. Shaft parts are one of the typical parts often encountered in hardware accessories. It is mainly used to support transmission parts, transmit torque and bear loads. According to the structure of shaft parts, they can be divided into optical shafts, stepped shafts and special shapes. Three types of shafts; or solid shafts and hollow shafts.

Surface roughness

Ra2.5 ~ 0.63μm

Radial runout

0.01 ~ 0.03mm

Processing diameter

42mm

Non-standard shaft parts batch processing equipment

Shaft parts are one of the typical parts often encountered in hardware accessories. It is mainly used to support transmission parts, transmit torque and bear loads. According to the structure of shaft parts, they can be divided into optical shafts, stepped shafts and special shapes. Three types of shafts; or solid shafts and hollow shafts. They are used in machines to support transmission parts such as gears, belt wheels, etc. to transmit torque or motion. Shaft parts are rotating parts, whose length is greater than the diameter, and are generally composed of the outer cylindrical surface, conical surface, inner hole and thread of the concentric shaft and the corresponding end surface. According to different structural shapes, shaft parts can be divided into optical axis, stepped shaft, hollow shaft and crankshaft.

A shaft with an aspect ratio of less than 5 is called a short shaft, and a shaft with an aspect ratio of more than 20 is called an slender shaft. Most shafts are in between.

The shaft is supported by a bearing, and the shaft section that cooperates with the bearing is called a journal. Journals are shaft assembly standards, and their accuracy and surface quality are generally high. Technical requirements are generally based on the main functions and working conditions of the shaft. Generally, there are the following:

(a) Surface roughness

Generally, the surface roughness of the shaft diameter matched with the transmission is Ra2.5 ~ 0.63μm, and the surface roughness of the support shaft diameter matched with the bearing is Ra0.63 ~ 0.16μm. Zhonglida Machinery Co., Ltd. can process a surface finish of Ra0.05μm.

(b) mutual position accuracy

The position accuracy requirements of shaft parts are mainly determined by the position and function of the shaft in the machine. Normally, the coaxiality of the bearing assembly journal to the support journal should be guaranteed, otherwise it will affect the transmission precision of the transmission member (gear, etc.) and generate noise. For a normal-precision shaft, the radial runout of the supporting shaft journal to the supporting journal is generally 0.01 ~ 0.03mm, and the high-precision shaft (such as the main shaft) is usually 0.001 ~ 0.005mm.

(c) Geometry accuracy

The geometric accuracy of shaft parts mainly refers to the roundness and cylindricity of the journal, outer tapered surface, Morse taper, etc. Generally, the tolerance should be limited to the dimensional tolerance range. For inner and outer circular surfaces with higher accuracy requirements, the permissible deviation should be marked on the drawing.

(d) Dimensional accuracy

In order to determine the position of the shaft, the bearing journal usually requires higher dimensional accuracy (IT5 ~ IT7). The requirements for the dimensional accuracy of the assembly of the transmission journal are generally low (IT6 ~ IT9).

CNC PRECISION AUTOMATIC LATHE

Center-type CNC lathes (center / slitting lathes) are a type of CNC machine tools mainly used for precision machining of shafts and non-standard shafts. It has a qualitative leap in machining efficiency and accuracy than CNC lathes. The dual-axis arrangement of tools greatly reduces the processing cycle time. By shortening the tool exchange time between the row cutter and the opposing tool table, the multiple tool table overlap function, the effective thread movement and overlap function of the thread chip, and the direct spindle during secondary processing. Indexing function to reduce idling time. The chip cutter is always processed at the clamping position of the spindle and the workpiece, which ensures that the machining accuracy remains unchanged. The largest processing diameter of coring machines on the market is 42mm, which has great advantages in the precision shaft processing market. Zhonglida Machinery Co., Ltd. has dozens high-precision coring machines and multiple five-axis linkage machining centers. This series of machine tools can be equipped with automatic feeding devices to achieve fully automated production of a single machine tool, reducing labor costs and product failure rates. Ideal for mass production of precision shaft parts.