Precision Measurement Tools for Automotive & Mold Manufacturing

Precision inspection tools are instruments and equipment used for high-precision measurement or verification of object size, shape, position and other parameters, and checking fixture are special tools used to quickly determine whether a product meets the design standards.

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Description Technical Data Assembly Tutorial

What Are Checking Fixtures

Checking fixtures (also called inspection fixtures) are precision measurement systems and intelligent quality control solutions tailored for automotive electronics, industrial manufacturing, and complex assembly lines. In automotive applications, these fixtures serve as master validation tools to verify dimensional accuracy, functional fitment, and compliance with OEM specifications across components like stamped metal parts, die-castings, plastic assemblies, and full vehicle sub-systems.

Core Functions & Value Proposition

‌In-Line Quality Assurance‌

Rapid visual/hole-position checks and ±0.05mm-accurate dimensional validation directly on production floors
Seamless integration with CMMs (Coordinate Measuring Machines) for body-coordinate system alignment

‌Assembly Process Optimization‌

Resolve fitment conflicts during new model launches (e.g., door-hood gap inconsistencies)
Calibration reference for molds, welding jigs, and robotic tooling

‌Functional Validation‌

Simulate real-world assembly conditions to test:
Moving part trajectories (e.g., trunk lid closing paths)
Surface flushness, sealing integrity, and gap uniformity
Multi-component alignment (e.g., headlight-bumper-fender interfaces)

‌Custom Fixture Types We Deliver

Measuring Holder (Holding Fixture)
Specifically designed for three-coordinate measurement, through the fixed parts and simulate the body coordinate system, accurate extraction of characteristic data (such as holes, profiles)
Example: Wheel hub fixtures, through high-precision modular design (base plate aluminum, reference steel parts) to achieve dimensional inspection (accuracy of ± 0.05mm)
Functional Gauge
Used to verify the fit of multiple components, such as door assembly gages, detecting parameters such as clearance and surface difference.
Example: automobile main driver lower guard assembly gage, integrated fixing mechanism (tray, clamping components) and detection module (laser, aperture detection box), to ensure the stability of the test
Functional Master Model Gauge
Simulates the structure of the whole vehicle or sub-assembly, verifies the functionality of the components (e.g. opening and closing parts movement trajectory, sealing).

According to the test object classification Single-piece gage For a single part of the key dimensions of the inspection, such as the engine cylinder inspection tool Comprehensive assembly gage Detecting the overall fitness of the assembly of multiple parts, such as the body welded assembly gage Specialized Gauges Customized tools for specific scenarios, e.g. wheel fixtures that support quick mold changes to accommodate different wheel types.

Application

Single-Part Fixtures‌: Engine block bore/spatial dimension verification
‌Assembly Fixtures‌: BIW (Body-in-White) weldment alignment checks
‌Modular Systems‌: Quick-change wheel fixture kits for multi-model production

‌Why Choose Our Custom Inspection Solutions

‌Material Expertise‌: Sheet metal, die-cast alloys, engineering-grade polymers
‌OEM Compliance‌: Built to your 2D drawings/3D CAD models (CATIA, NX, SolidWorks)
‌End-to-End Service‌: Design validation → Prototyping → Production tooling
‌Industry-Specific Validation‌

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Auto Checking Fixture Standard Part Measurement concept

	P&A Accurate Technology Co., ltd.
	Second Floor No. 1 Fengyuan Road, Chenjiang Street, Zhongkai High-tech Zone, Huizhou
	0752-2090655
	13413175198
	sales@jztester.com
	www.jztester.com