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Manufacturing and Assembly

Facilitate Your Production Process

CMM Manufacturing in Action: Battery Case Production

New energy vehicle battery cases present one of the most demanding CMM manufacturing challenges — aluminum alloy shells that must be both lightweight and precisely dimensioned, produced at scale, under thermal conditions that cause deformation at every stage of the process.Mounting hole positions drift. Frame structures warp under welding stress. Battery module assembly accuracy degrades when any upstream dimension is off. Traditional gauging methods can’t keep pace with the speed or the complexity.

PMT portable measuring arms bring CMM-grade accuracy directly to the production line. Real-time data acquisition catches deviations as they happen, feeding correction signals back to the assembly team before out-of-tolerance parts advance further down the line.

<p><strong>CMM Manufacturing in Action: Battery Case Production</strong></p> <p>New energy vehicle battery cases present one of the most demanding CMM manufacturing challenges — aluminum alloy shells that must be both lightweight and precisely dimensioned, produced at scale, under thermal conditions that cause deformation at every stage of the process.Mounting hole positions drift. Frame structures warp under welding stress. Battery module assembly accuracy degrades when any upstream dimension is off. Traditional gauging methods can’t keep pace with the speed or the complexity.</p> <p>PMT portable measuring arms bring CMM-grade accuracy directly to the production line. Real-time data acquisition catches deviations as they happen, feeding correction signals back to the assembly team before out-of-tolerance parts advance further down the line.</p>

Analyse Measurement Requirements
and Facilitate Manufacturing and Assembly Processes

The measurement requirements are divided into three aspects. Combining with software, PMT measuring arm can obtain a comprehensive data which will be served as an important basis for the improvement of production and assembly processes.

Precision Measurement of Mounting Holes

Since the mounting holes of the battery case need to be precisely matched to the structure of the vehicle, each mounting hole must be within the design tolerances. The test results can be used to adjust the assembly fixtures in the production line and reduce errors.

Frame Size and Flatness

Detect the overall size and surface flatness of the frame to ensure that the frame will not be deformed due to welding or processing stress. The inspection data can be fed back to the welding and cooling processes to improve process parameters.

Assembly Accuracy of Battery Module Installation

Check the assembly accuracy of the battery module to ensure that the module is accurately matched with the internal frame of the battery case. The test data is used to adjust the internal support and fixing process to avoid any deformation that will affect the product performance in the installation position.

<p><span style="color: #ff6600;"><strong>Precision Measurement of Mounting Holes </strong></span></p> <p>Since the mounting holes of the battery case need to be precisely matched to the structure of the vehicle, each mounting hole must be within the design tolerances. The test results can be used to adjust the assembly fixtures in the production line and reduce errors.</p> <p><span style="color: #ff6600;"><strong>Frame Size and Flatness </strong></span></p> <p>Detect the overall size and surface flatness of the frame to ensure that the frame will not be deformed due to welding or processing stress. The inspection data can be fed back to the welding and cooling processes to improve process parameters.</p> <p><span style="color: #ff6600;"><strong>Assembly Accuracy of Battery Module Installation</strong></span></p> <p>Check the assembly accuracy of the battery module to ensure that the module is accurately matched with the internal frame of the battery case. The test data is used to adjust the internal support and fixing process to avoid any deformation that will affect the product performance in the installation position.</p>
<p><span style="color: #ff6600;"><strong>Precision Measurement of Mounting Holes </strong></span></p> <p>Since the mounting holes of the battery case need to be precisely matched to the structure of the vehicle, each mounting hole must be within the design tolerances. The test results can be used to adjust the assembly fixtures in the production line and reduce errors.</p> <p><span style="color: #ff6600;"><strong>Frame Size and Flatness </strong></span></p> <p>Detect the overall size and surface flatness of the frame to ensure that the frame will not be deformed due to welding or processing stress. The inspection data can be fed back to the welding and cooling processes to improve process parameters.</p> <p><span style="color: #ff6600;"><strong>Assembly Accuracy of Battery Module Installation</strong></span></p> <p>Check the assembly accuracy of the battery module to ensure that the module is accurately matched with the internal frame of the battery case. The test data is used to adjust the internal support and fixing process to avoid any deformation that will affect the product performance in the installation position.</p>
<p><span style="color: #ff6600;"><strong>Precision Measurement of Mounting Holes </strong></span></p> <p>Since the mounting holes of the battery case need to be precisely matched to the structure of the vehicle, each mounting hole must be within the design tolerances. The test results can be used to adjust the assembly fixtures in the production line and reduce errors.</p> <p><span style="color: #ff6600;"><strong>Frame Size and Flatness </strong></span></p> <p>Detect the overall size and surface flatness of the frame to ensure that the frame will not be deformed due to welding or processing stress. The inspection data can be fed back to the welding and cooling processes to improve process parameters.</p> <p><span style="color: #ff6600;"><strong>Assembly Accuracy of Battery Module Installation</strong></span></p> <p>Check the assembly accuracy of the battery module to ensure that the module is accurately matched with the internal frame of the battery case. The test data is used to adjust the internal support and fixing process to avoid any deformation that will affect the product performance in the installation position.</p>

Measurement Process and Data Feedback

Portable Measurement Process
and Real-time Data Feedback

During the measurement process, the probe detects the position of the mounting holes one by one, and PMT blue-light ScanArm scans the frame size and flatness to ensure that each workpiece meets the quality standards. The measured data is sent to the quality control system in real time, and reports are generated and sent to the production team.

Production&Assembly
Concerted Feedback

According to the test report, the production line can adjust the processing parameters in real time, such as welding temperature and fixture fixing accuracy, to make sure the assembly error of each component is within the tolerance range.

Customer Reviews

New Energy Battery Production Line Manager

“Millimeter-level errors in battery module assembly directly impact performance. The PMT portable coordinate measuring machine with its laser scanner can rapidly reconstruct assembly surface point clouds, providing real-time gap data. Integrated with robotic auto-correction, it boosted our daily output by 25%.”

Mr. Zhao
Mr. Zhao

Heavy Machinery Assembly Director

“Previously, large structural assembly relied on experienced workers, making it challenging for newcomers. The PMT portable measuring arm solved this issue. New hires now quickly identify deviations, cutting rework rates by 60% and saving labor costs. Additionally, PMT’s quick response – 4-hour response and 4-day repair service, further solidified our trust.”

Mr. chen
Mr. chen

From Ms. Liu, PM of an Automotive Parts Supplier

“The articulated arm CMM is lightweight and easy to use than we expected, which can totally replace multiple traditional tools. Most components can now be inspected with the PMT CMM machine arm, simplifying workflows and boosting efficiency. Its portability makes it an indispensable asset.”

Ms. Liu
Ms. Liu

FAQ

What role does a CMM play directly in manufacturing and production lines?

CMMs have transitioned from back-end laboratories to the production floor, acting as “in-line quality inspectors.” They are vital for first article inspection, process control, fixture calibration, and reverse engineering, making them indispensable in industries like automotive, aerospace, and precision molding.

How do portable CMMs assist in precision alignment during the assembly process?

They ensure precise alignment through real-time measurement and instant feedback:

Establish datums: Create a coordinate system on fixed base components.

Measure and compare: Instantly measure key features and compare them to CAD models.

Dynamic adjustment: Adjust part positioning live until tolerances are met.

Verify: Re-measure immediately to ensure a successful assembly.

Can 3D scanning be used for rapid root cause analysis on the assembly line?

Yes. It enables fast data capture directly on the floor without moving parts. By running a virtual assembly in software and using deviation color maps, operators can instantly identify the defective part, decide on a repair plan within minutes, and minimize downtime.

How do you inspect large assemblies that cannot fit on a traditional CMM bed?

By using portable articulated arm CMMs, which can be moved directly around or inside the workpiece. For extremely large components, operators can use the “leapfrog” technique to measure local features in sections and stitch them together for a complete inspection.

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Hot Line: +86 400 681 3688
Tel: +86 0512 6286 8300
Email: info@pmt3d.com

Hot Line:+86 400 681 3688
Tel:+86-0512 6286 8300
Email:info@pmt3d.com

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