A hydraulic automatic fixture for turning motor casings

Abstract

The invention discloses a hydraulic automatic clamp for turning a motor shell. The hydraulic automatic clamp comprises a hollow clamp body. A packing is installed on one side of the clamp body and provided with a packing conical hole matched with the outer diameter of a main shaft. The other side of the clamp body is provided with a blind flange. The blind flange is provided with a rotatable clamping mechanism. The clamping mechanism is connected with a pull rod. One end of the pull rod penetrates out of the packing conical hole. The pull rod is driven by a hydraulic rotating oil cylinder and matched with a main shaft conical hole. Under the drive of the pull rod, the clamping mechanism can rotate and clamp and fix the motor shell. The motor shell is clamped and fixed in a hydraulic automatic clamping mode, clamping is convenient, the clamping efficiency is high, the clamping rigidity is high, the clamping force is stable and adjustable, clamping deformation can be greatly reduced, the motor shell machining precision is improved, the cylindricity of 0.005 mm of a bearing housing can be ensured, the motor shell machining quality is improved, the cost is reduced, and benefits are improved.

Description

technical field [0001] The invention relates to a fixture for CNC machine tool processing, in particular to a hydraulic automatic fixture for turning and processing motor casings. Background technique [0002] The motor casing is used as the installation part of the bearing and the rotor in the whole motor, and plays a key role in the stable rotation of the motor. The remarkable feature of motor housing processing is that the processing content is mainly turning. Figure 1-3 It is a schematic diagram of the structure of a common motor casing, Figure 1-3 Among them, holes a1 and a2 are traditional clamping positioning holes (hole a1 is set on the boss d), surfaces b1, b2 and b3 are traditional clamping and pressing surfaces, and surfaces c1, c2 and c3 are traditional Clamping positioning surface. The motor case is clamped and fixed by traditional fixtures. When the motor case is processed, press Figure 1-3 The corresponding clamping positioning hole, clamping pressing surf...

AI Technical Summary

Problems solved by technology

The use of traditional fixtures to clamp and fix the motor housing has certain shortcomings: First, the clamping positioning point is far away from the bearing chamber, and the clamping rigidity is poor. During the turning process, the parts will be slightly deformed, resulting in 0.005mm It is difficult to guarantee the cylindricity of the cylindricity, and there are often out-of-tolerance situations. Therefore, it is necessary to appropriately reduce the turning feed rate during turning to ensure the cylindricity requirements; Therefore, it is necessary to reduce the spindle speed during turning, but this will affect the processing efficiency; thirdly, the traditional clamping needs to be clamped manually, and the manual control of the clamping force is not stable enough, which will easily lead to the deformation of the part clamping and low clamping efficiency. ; Fourth, the dynamic balance performance of the manual fixture is poor, and the fixture is prone to vibration during rotation, which affects the machining accuracy of the part

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