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End-tooth plate, rat-tooth plate, end-face tooth plate, rat-tooth plate

Keywords:

Product Description

A rat-tooth plate, also known as an end-tooth plate or end-face tooth plate, with the foreign name Hirth coupling, serves as a core component of mechanical indexing equipment and plays a crucial role in high-precision mechanical fields. The following provides a detailed analysis from aspects including core definition, structural characteristics, performance parameters, materials and processing, structural design, and application value.

I. Core Definition and Application Fields

A rat-tooth plate is a precision positioning component consisting of paired tooth plates, achieving high-precision radial and circumferential positioning through triangular engagement teeth evenly distributed on the end face. Its main applications are in fields with extremely high precision requirements, including:
  • CNC machine tools
  • Precision measurement equipment
  • Aerospace equipment

II. Structural Characteristics and Advantages

The structure and performance of the rat-tooth plate have significant advantages, leading to its widespread use in precision machinery:
  1. Structural Composition : Consists of paired tooth plates with triangular engagement teeth evenly distributed on the end face, achieving positioning through tooth surface engagement.
  2. Core Advantages
    • Simple Structure: Simple design, reducing complex transmission links.
    • High Rigidity: Able to withstand large loads and impact forces, ensuring equipment stability.
    • High Repeat Positioning Accuracy: This is its most prominent feature, with typical indexing accuracy reaching ±2 seconds to ±5 seconds, ensuring accuracy in multiple positioning operations.

III. Key Performance Parameters

The performance parameters of the rat-tooth plate determine its applicable range and application effect:
  • Indexing Accuracy : ±2 seconds to ±5 seconds, meeting high-precision positioning requirements.
  • Diameter Range : Covers 50mm to 1000mm, allowing selection of appropriate size according to different equipment needs.
  • Indexing Angle Adjustment : Supports 1-degree or smaller indexing angle adjustment, achieving fine angle control.

IV. Material and Processing Technology

The material selection and processing technology of the rat-tooth plate directly affect its performance:
  1. Material : Uses chromium-molybdenum steel, which, after heat treatment, has high hardness and wear resistance, extending the service life of the component.
  2. Processing Technology : Requires high-precision CNC indexing tables, grinding wheel adjustment compensation, and closed-loop control systems to ensure that the processing accuracy meets the requirements.

V. Structural Design Diversity

To adapt to the needs of different equipment, the rat-tooth plate has diversity in structural design:
  • Number of Tooth Plates : Includes two-plate or three-plate designs.
  • Control Method : Some models support hydraulic braking or servo-hydraulic control, improving operational convenience and controllability.
  • Engagement Tooth Type : Includes straight teeth and arc teeth, allowing selection of appropriate tooth type according to the specific application scenario.
  • Customization : Different indexing specifications can be customized to meet the personalized needs of equipment such as CNC turntables and power turrets.

VI. Value in Automated Applications

In CNC machine tool automation applications, the rapid positioning and stable performance of the rat-tooth plate make it an important functional module for five-axis linkage equipment, providing reliable positioning assurance for high-precision, high-efficiency machining and promoting the development of manufacturing towards higher precision and automation levels.

Classification:

Gear Series

Product Consulting

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