Thread Measuring Instrument

In high-end equipment manufacturing, aerospace, automotive, petrochemical and other key fields, threads serve as core connecting and transmission components. Their geometric accuracy, profile quality and consistency directly determine the overall reliability, sealing performance and service life of complete machines.

The DTMS series thread measuring instrument adopt coordinate stylus scanning as the core technology, integrating ultra-precision mechanical structures, high-resolution sensing systems and intelligent measurement software. They deliver a one-stop thread measurement solution featuring full-parameter coverage, high precision and high efficiency, fully applicable to comprehensive scenarios including precision metrology, batch quality control and product calibration, and provide professional technical support for the quality control of threaded parts across various industries.

I. Core Technical Architecture – Underpinning the Foundation of Precision Measurement

The DTMS series thread measuring machine adopts the stylus-contact rectangular coordinate measuring method. Relying on a rigid mechanical structure and high-precision sensing technology, it achieves accurate capture and data analysis of thread profiles. Its core architecture features outstanding professionalism and reliability:

1. The X-axis adopts ultra-precision linear guide rails as the measurement reference, which delivers exceptional reference accuracy, smooth motion and low wear rate. It effectively ensures long-term operational stability and service life of the equipment, providing solid support for high-precision horizontal measurement.

2. The Z1 axis is equipped with an imported digital sensor, boasting high accuracy, excellent linearity and stable sampling performance. It enables profile acquisition at nanometer-level resolution and precisely captures micro morphological features on thread surfaces.

3. Intelligent Measurement Logic:The stylus makes precise contact with the surface of the measured thread and performs scanning to collect real-time coordinate point data of the surface profile. Dedicated measurement software completes mathematical calculation, error compensation and parameter labeling, realizing full-dimensional automatic measurement and analysis covering both macroscopic geometric dimensions and microscopic surface quality. The whole process requires no manual intervention and effectively eliminates human measurement errors.

The machine supports integrated detection of dimensions, angles, geometric tolerances, surface roughness, waviness, raw profiles and dedicated thread parameters in one unit. No additional measuring equipment is required, greatly improving inspection efficiency and data consistency.

II. Full-Dimensional Measurement Capacity to Adapt to Diverse Thread Inspection Requirements

(I) General Geometric Parameter Measurement

It covers common geometric parameters in industrial measurement and meets the basic inspection needs of various parts and components, including:

1. Dimensional parameters: horizontal distance, vertical distance, linear distance, radius and diameter, enabling accurate measurement of critical dimensions of threads and related parts.

2. Angular parameters: horizontal angle, vertical angle and arbitrary included angle, suitable for the inspection of key angles such as thread flank angle and mounting angle.

3. Geometric tolerances: parallelism, perpendicularity, straightness, convexity and profile tolerance, comprehensively evaluating the geometric shape and positional accuracy of threads and components.

4. Auxiliary functions: capable of generating auxiliary points, auxiliary lines and auxiliary circles to satisfy the dimensioning and measurement requirements of complex threads and special-shaped parts.

5. Surface quality analysis: supports full-parameter analysis of roughness (Ra, Rq, Rz, Rt, Rsk, Rku, etc.), waviness (Wt, Wa, Wp, etc.) and primary profile parameters (Pa, Pt, Pp, etc.). It fully characterizes the micro-morphology of thread surfaces and helps evaluate the service performance of components.

(II) Specialized Thread Measurement

Tailored to the dedicated inspection requirements of threaded parts, the machine delivers comprehensive thread measurement capabilities and supports high-precision inspection of threads in various specifications and types:

1. Full coverage of major parameters. It accurately measures core thread parameters including major diameter, pitch diameter, minor diameter, pitch, thread flank angle, half flank angle, flank straightness, and lead angle, enabling comprehensive evaluation of thread geometric accuracy.

2. Adaptation to complex threads. It efficiently inspects high-gradient threads such as trapezoidal threads, buttress threads and sawtooth threads, solving the pain point that traditional equipment struggles with complex thread profile inspection.

3. Full compatibility with mainstream standards. It supports Japanese and Korean old British pipe threads (PT/PF), American general sealing pipe threads (NPT), dry-seal pipe threads (NPTF) and other mainstream thread standards, meeting inspection demands for import and export products across multiple industries.

4. Efficient and intelligent inspection. A single scan automatically records measurement data at any position of the thread, displays various thread parameters in real time, and automatically generates profile curves of the inspected thread. It realizes automated inspection and data visualization, greatly shortening the inspection cycle and improving testing efficiency.

III. Key Technical Parameters – Demonstrating Core Advantages of High Precision

The DTMS series consists of two models with optimized configurations for application scenarios with different precision requirements. Its key technical parameters are listed as follows, fully demonstrating the equipment’s outstanding high precision and stability.