The function of fixture testing is to detect and measure the dimensions, shape, surface quality, and other aspects of workpieces. In the manufacturing industry, gauges are very important tools.
Fixture Testing
- A test fixture sets up the necessary objects, data, and conditions for testing a particular piece of code or functionality.
- Fixtures are used in various types of testing, including electronics, software, and physical device testing.
- In software testing, fixtures initialize the system state, load test data, create mock objects, or perform any other setup required before running tests.
- Test frameworks like JUnit, pytest, and Ruby on Rails provide mechanisms to define and manage fixtures.
Fixture Testing Capabilities
Visual hole marking is usually done using acrylic resin material.
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US
Metric
Cast iron
70.9in. x 27.6 in. x19.7in.
1800mm x 700mm x500mm
aluminum alloy
70.9in. x 27.6 in. x19.7in.
2200mm x 700mm x500mm
steel
70.9in. x 27.6 in. x19.7in.
2200mm x 700mm x500mm
*The main reference material for large and medium-sized gauges is steel plate or steel plate with resin added.
Fixture Testing Material
The selection of inspection tool materials is mainly based on the function and purpose of the inspection tool, as well as the specific usage environment.
Material
- Acrylic Resin
- Aluminum Alloy
- Steel
- GCr15
- SKD 11
The Advantage of Fixture Testing
ABS plastic can be easily finished and post-processed to achieve a smooth and aesthetically appealing surface, which is desirable for many consumer products.
Advantage
1. Comprehensive Testing
2. Product Performance Analysis
3. Reduced Field Failures and Warranty Claims
4. Streamlined Production Process
5. Repeatability and Consistency
Application of Fixture Testing
Fixture Testing is a simple tool used by industrial production enterprises to control various sizes of products, aiming to improve production efficiency and control quality. It is particularly suitable for large-scale production of products, such as automotive parts, household appliance parts, etc.
Guidelines for Fixture Testing
Fixtures testing enable accurate and repeatable testing, leading to improved product quality, reliability, and compliance with industry standards and regulations.
Fixture Testing Guide
Fixture Testing
The function of fixture testing is to detect and measure the dimensions, shape, surface quality, and other aspects of workpieces. In the manufacturing industry, gauges are very important tools that play a crucial role in achieving product quality that meets design standards and meets customer needs. There are many types of structures for fixture testing, usually including various measuring tools, flat plates, measuring blocks, micrometers, calipers, hardness testers, height gauges, and other components.
Operators can use fixture testing to accurately measure and inspect products during the production process, ensuring that the products are stable and of good quality. The selection and use of fixture testing play a crucial role in controlling product quality. Therefore, technicians must carry out fixture testing by regulatory requirements during the manufacturing process, to improve product quality and reliability.
If you want to measure the dimensions of stamped parts, there are two methods: blue light scanning and fixture testing. Blue light scanning has a relatively high investment, so it is less commonly used. The production of fixture testing does not require other steps and can directly measure the gap surface difference of the workpiece. In modern manufacturing, gauges are commonly used in the automotive stamping parts manufacturing industry. Gauge inspection refers to the use of some measuring tools to measure the hole position, size, shape, material edge, and other workpieces of stamped parts.
Types and Structures of Fixture Testing
Each type of workpiece corresponds to a different fixture testing and equipment. fixture testing can be divided into many categories, such as single-piece fixture testing, functional model fixture testing, subassembly fixture testing, opening fixture testing, and white body fixture testing.
- Opening Fixture Testing
The function of an opening fixture testing is to detect the gap relationship between various installation components. If there is a fuel filler cap on the side of the car body, Fixture testing will be required to produce a stamping mold model for the fuel filler cap, and the Fixture testing will be used to check whether the accuracy of the fuel filler cap on the side stamped parts of the car body meets the specified requirements.
- Assembly Fixture Testing
Assembly fixture testing is a tool used to detect contact surfaces, weld sub-assembly holes, reference surfaces, and the fit between each component. After welding, the main purpose is to measure the dimensional accuracy of the sub-assemblies of the stamping die components, which can efficiently check whether the corresponding welding has been successful. There is still a difference between this fixture testing and a single piece fixture testing. The assembly fixture testing is used to detect welded fixture testing.
- Single-piece Fixture Testing
Single-piece fixture testing is mainly used in the stamping and forming of molds, mainly to measure whether the position of the edge and hole of a piece of fabric has changed, and to measure whether the dimensional accuracy of the spare parts has met the specified requirements. When inspecting a single piece of fixture testing, the operator will place the produced parts on the fixture testing. The measurement operation of the fixture testing must follow the standard operating methods of the fixture testing, measure where the components of the part are incorrect, and make timely adjustments.
- White Body Fixture Testing
The white body Fixture testing is mainly used to detect whether there is any damage between the holes, reference surfaces, contact surfaces, and various assembly parts of the entire car body. When welding and manufacturing a steel plate body frame of a car, place the steel plate body frame in the Fixture testing. To check whether the precision of the entire car body assembly meets the standard, technicians will bring the fixture testing on both sides of the car body assembly closer.
- Functional Model Fixture Testing
At present, the measurement and use of fixture testing are widely used, and the most commonly used equipment is still the blue light scanning equipment. The parts are placed on the measuring bracket, photographed and scanned, and compared with the part data to detect whether there is any error in the accuracy of the parts. The accuracy of the parts must meet the specified requirements. This tool takes less time to measure than manual gauges and has extremely high accuracy. The first method used in the manufacturing industry mainly considers the dimensional accuracy of measuring parts with gauges.
There are three main components of fixture testing, such as the skeleton and base parts, the mold part, and the functional part part. The materials commonly used for the base are aluminum, square steel, etc.
In the manufacturing industry, gauges are very important tools for measuring the dimensions of stamped parts, which can help improve the accuracy of workpieces. Gauge measurement plays an important role in controlling the dimensional accuracy of stamped parts.
Usage of Fixture Testing
- Requirements for the Use of Fixture Testing
Before acceptance, the operator will inspect the components of the fixture testing and carry out daily maintenance work. The use of fixture testing should be carried out by the content of the operation manual, and incorrect operation methods should not be used, otherwise, it will hurt the fixture testing and cause unnecessary trouble.
- Storage Area Requirements
The storage area of the fixture testing should have a flat requirement, and the ground should not have any potholes, otherwise it will affect the accuracy of the fixture testing detection. There is also a place for storing fixture testing, which is a room temperature and clean environment. Testing cannot be carried out in an environment with large dust. It is necessary to maintain a clean, dry, and well-ventilated environment around the fixture testing. The ambient temperature for storing fixture testing should not exceed 45 degrees Celsius.
- Requirements for the Placement of Fixture Testing
The measuring tool should be placed in the designated position for measurement, and the operator should label it with clear markings to make it easy to find it the next time it is used. The fixture testing should ensure sufficient clearance to assist operators in inspecting parts, daily maintenance work, calibration, and other steps. The various support points of the fixture testing are not allowed to be suspended. If the gauge is covered with plastic film after use, the purpose is to achieve strict protection, such as dust and water resistance, and avoid affecting the gauge.
- Handling of Fixture Testing
Gauges should be handled with care as much as possible, and if they need to be transported, several requirements should be met. Before being transported, the fixture testing should be checked to confirm that it does not affect other equipment and that each connecting mechanism is in a clamped state. If the fixture testing is being transported at a close distance, it can be lifted by a forklift. When moving with a forklift, the side of the fixture testing should be close to the forklift fork or fork frame, and the center of gravity of the fixture testing should be located between the two forks of the forklift to prevent the fixture testing from falling. The handling process must be stable.During the movement, the measuring tool should be as close to the ground as possible and should not move quickly to prevent damage to the measuring tool. At the same time, employees are making accusations nearby to prevent obstacles from appearing. If the fixture testing is transported to a distant location, use a flatbed truck to transport the fixture testing. After reaching the designated position, the fixture testing should be smoothly lowered.
Maintenance Methods for Fixture Testing
The daily maintenance and upkeep of the fixture testing plays a crucial role: before placing the parts, the operator must carefully wipe them clean, which helps to increase the accuracy of measurement data. When the parts are placed on the fixture, they should not be placed heavily to help protect the fixture. After using the fixture testing, all pins should be returned to their original positions and properly stored. When the fixture testing is not in use, it should be regularly cleaned and rustproof with rust-proof oil and lubricating oil. If the operator does not use a single-piece gauge, the gauge must be covered with a thin film. Mark the gauges once a year to ensure their accuracy. The maintenance methods of fixture testing can be mainly divided into two types, including daily maintenance and periodic maintenance.
- Daily Maintenance
Technicians need to clean the fixture testing every time they are used, and also check their identification, measurement points, coordinate values, etc. Also check the analog block, positioning pin, and detection pin of the fixture testing. There are many specific maintenance tasks for operators, mainly to carefully clean the dust and dirt on the inspection panel, simulation block, and equipment components, wear gloves to clean all parts of the entire fixture testing, and ensure cleanliness requirements are met; Check if the fixture testing identification has expired, is correct, the benchmark hole measurement value is correct, and if there are any areas where the measurement point identification needs to be adjusted. Positioning pins and inspection pins also need to be inspected. Check if there is any damage to the flipping mechanism and clamping device. If there are unqualified workpieces, they need to be reported to the quality engineer.
- Periodic Maintenance
The fixture testing needs periodic maintenance. Check if there are any damaged components in the fixture testing to ensure that the screws are tightened. The technical personnel add lubricating oil to the sliding, flipping, and opening mechanisms, as well as the connecting mechanisms of the simulation block. Apply rust-proof oil to the positioning holes, positioning columns, positioning grooves, detection pins, and positioning pinpoints of the fixture testing. Standing in front of the fixture testing, check whether the functional and testing surfaces of the tool are intact and there should be no damage. If there are damaged parts, it is necessary to have technical personnel repair them promptly. Proper use of fixture testing will increase their usage time and ensure high efficiency and accuracy of detection results.
