Three Key Points of Motor Shaft Manufacturing - EVS Robot
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motor shaft robotic loading
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In all industrial automation industries, the motor is a product with very large applications. Among them, the motor shaft is the most important part of the motor. The quality of the shaft directly determines the quality of the motor and also determines the quality of some industrial automation projects, success or failure, and stable operation in the later stage, so the machining of the shaft is a very important production process. Next, we will share some key points of the machining of the shaft:

Feeding System

The first key point is the feeding of the round bar, suitable feeding system can make subsequent loading and machining more convenient and more efficient. There are three ways of round bar feeding:

1. Stock Bin Feeding

2. Stock Bin Feeding with Ejector

3. Stock Bin Feeding with Push Plate

Source: Pinterest

This first way is with no positioning for each round bar, so it needs positioning before loading to the CNC lathe. The second and the third feeding ways are using a ejector or push plate, along with a positioning device so the subsequent process can be easier than the first way.

Loading System

Everyone knows automation is key to profitability, motor shaft machining is no exception. Using automatic loading system is the mainstream for motor shaft machining because it’s not a cutting-age technology any more. Anyone who want to reduce the labor cost and improve efficiency will choose to automate the loading process in the motor shaft machining production line. Automatic loading system offers 30 to 50 percent faster loading times than manual loading, enable the lathes to operate without operator attention for long periods of time and combine more consistent production with more accurate scheduling. There are two main method for motor shaft automatic loading: Gantry Loading System and Robotic Loading System.

1. Gantry Loading System

Gantry loading system consists of 2-4 aixs linear motion, each shaft runs in a straight line at a very high speed and can be quickly responded by a servo motor, it is stable and accurate (up to 0.02mm). It is very easy to use and maintenance.

Gantry System Advantages: compact layout, small floor area, high precision, high efficiency, stable operation, convenient maintenance.

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2. Robotic Loading System

Space is already at a premium in most motor shaft production facilities, while robots have a small footprint and cables routed through the wrist with 6 movable axis, so robotic loading system is more flexible than any other loading system. It is less expensive and easier to use than you might imagine, robotic loading system offers you considerable benefits even on small production runs. The 6-Axis robot’s speed and degrees of freedom allow it to accomplish many tasks that would be impossible for the 2-4 Axes available on a traditional gantry.

 

Robotic Loading System Advantages: compact layout, multi-style, high precision, high efficiency, smooth operation, convenient maintenance, high flexibility.

motor shaft robotic loading
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Grinder Clamping System

Because the accuracy requirement of the motor shaft is very high, only the top positioning can be used to clamp the motor shaft. When using double tops to install the workpiece, the front and rear tops cannot drive the workpiece to rotate, and other mechanisms must be used to transmit power. There are 3 methods for motor shaft clamping: lathe carrier, centrifugal clamping and chuck.

1. lathe carrier

lathe carrier
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Advantages: big transfer power, low cost

Disadvantages: Low efficiency, low compatibility

2. Centrifugal clamping mechanism

When the grinding machine is rotating, the clamping block rotates around the rotation axis under the action of centrifugal force and then clamps the motor shaft. When the grinding machine stops, the clamping block returns to its original position under the action of spring.

Centrifugal clamping mechanism
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Advantages: high efficiency, low cost

Disadvantages: low transfer power, the grinding machine must be reformed

3. chuck

The grinder chuck is opened and closed by solenoid valve.

chuck1
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chuck 2
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