Ball screw machining standard

As a precision transmission component, ball screw is widely used in machinery, electronics, aviation and other fields. In order to ensure the performance and quality of the ball screw, there are strict regulations on its processing standards and quality requirements. This article will detail the ball screw processing standards and quality requirements.

1. Ball Screws Overview

The ball screw is composed of a screw, a nut and a ball, and is a transmission device that converts rotary motion into linear motion. Its working principle is to use the rolling of the ball between the screw and the nut to reduce the frictional resistance and improve the transmission efficiency. Ball screw has the characteristics of high precision, strong carrying capacity and stable operation, and is widely used in various precision equipment and automation systems.

2. ball screw machining standard

1. Material selection: The material of the ball screw is usually high-quality carbon structural steel, alloy structural steel or stainless steel, which requires good wear resistance, strength and toughness.

2. Processing technology: The processing technology of ball screw includes forging, turning, grinding, heat treatment and other processes. In the process of processing, the process parameters of each process should be strictly controlled to ensure that the surface roughness, dimensional accuracy and geometry of the screw meet the standard requirements.

3. Surface treatment: The surface treatment of ball screws usually uses chromium plating, nitriding, high-frequency quenching and other methods to improve surface hardness, wear resistance and corrosion resistance.

4. Accuracy grade: The accuracy grade of the ball screw is divided into ordinary grade, advanced grade, precision grade and ultra-precision grade. Different accuracy levels of the screw for different occasions, the user should choose the appropriate accuracy level according to the actual needs.

Quality requirements for 3. ball screw

Straightness: The straightness of the ball screw is required to be high, and should generally be controlled within 0.01mm/1000mm. Poor straightness will affect the transmission performance and service life of the screw.

2. Roundness and taper: The roundness and taper requirements of the ball screw are low, and should generally be controlled within 0.005mm. Roundness and excessive taper can cause vibration and noise during rotation of the lead screw.

3. Surface roughness: The surface roughness of the ball screw directly affects its transmission performance and wear resistance. Generally, the surface roughness Ra value of the screw is less than 0.2 μm.

4. Wear resistance: The ball screw will be subject to greater wear during use, so it is required to have good wear resistance. The wear resistance can be improved by selecting wear-resistant materials and improving the surface hardness.

5. Fatigue resistance: The ball screw is prone to fatigue failure under alternating loads, so it requires high fatigue resistance. The fatigue resistance can be improved by optimizing the heat treatment process and reducing stress concentration.

In short, as a precision transmission component, the ball screw has strict requirements for its processing standards and quality requirements. In the actual production process, the processing standards should be strictly observed to ensure that the performance and quality of the ball screw meet the requirements.

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