Automated thread inspection with high-resolution HMI

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Automated Thread Gauge

Since 2013, the Autonetics Automated Thread Gauge has been the cornerstone of OCTG automated, in-process thread inspection. With installations across the globe, our technology has scanned millions of threaded connections, helping our partners reduce labor costs while simultaneously achieving 100% inspection coverage.

What is the AGU

The AGU is an in-process, high-speed, non-contact measurement system designed and engineered to automate the process of OCTG thread inspection.

The system utilizes industrial robotics, cutting-edge sensor technology and industry-vetted analytics to produce fast, accurate and reliable inspection results. A small, modular cell design allows for installation in any manufacturing line layout. Standardized communication protocols ensure quick and easy integration with L1 and L2 systems providing 100% data retention and traceability.

How it Works

The AGU is installed downstream from a pipe threader (CNC lathe, PMC, etc). After a pipe is threaded, it is transferred down the line to the Autonetics Automated Pipe Cleaning System. This station ensures that all coolant and debris are removed from the threads prior to inspection.

AGU5 Gauge Head w/ FMX Attachment

After cleaning, the pipe is transferred to the AGU station where a Begin Scan signal from the handling system triggers the inspection process.

The robot moves out until the pipe face is detected, at which point a centering routine translates and rotates the gauge head so that it is perfectly aligned with the axis of the pipe threads.

Once the gauge head is aligned, the system performs a series of profiles scans, rotating each step to ensure full 360° thread coverage. Upon completing the final scan, the robot returns to the home position and a signal is sent to the handling system to release the pipe for transfer.

Each scan profile is analyzed and aggregated to form a composite model of the threadform. Detailed measurement results are presented on the AGU HMI including a pass/fail determination. These results are also forwarded to the customers L2 / SPC system for permanent data retention and traceability.

Features Measured

The Autonetics Metrology Suite is responsible for analyzing the data and determining acceptance. All calculations are performed in accordance with API Specification 5B.

Features not specified in the 5B such as those commonly found in premium connections, are developed by our in-house software department in close conjunction with our customers and industry experts. Autonetics offers full customization for how specific features should be measured.

Below is a list of commonly measured features.

Addendum
Bevel Diameter
Black Threads
Chamfer Angle
Pipe Face Width
Internal Diameters
Lc Distance

Leads
MRP
Pilot Diameter
Pitch Diameter
Runout
Seal Lengths
Seal Tapers

Standoff
Thread Heights
Thread Ovality
Thread Tapers
Thread Pullout
Thread Widths
Wedge Lockup Location

The Interface

The AGU interface presents a clear and concise summary of each pipe inspected. Powerful trend charting is available to allow operators to make adjustments to the threader prior to an element exceeding the tolerance limits.

Tolerances for each thread type / diameter combination are pre-loaded onto the gauge. A “Work Order”, which defines the current thread type being produced and sets the appropriate tolerances, is created manually or via input from the handling PLC. All tolerances can be adjusted through the HMI or via remote input.

Supported Pipe Diameters & Thread Types

Through the use of an automated tool changer, the AGU supports pipe diameters from 2-3/8″ up to 16″. Changeover time between measurement heads is less than a minute.

All API thread types are supported. Additionally, custom specialty threads can be added to the AGU, including semi-premium and premium threads with negative flanks.

Automated Pipe Cleaning and Deburr

Automated Pipe Cleaning w/Deburr

Pipe threads must be clean, dry and free of debris prior to inspection with the AGU. Autonetics offers a proven, turnkey solution with the Automated Pipe Cleaning (APC) system.

The APC is a standalone station with an integrated vacuum system that removes coolant and loose debris from both the interior and exterior of the pipe.

An optional attachment simultaneously deburrs the first thread on the pipe, automating yet another, historically manual, step in the finishing process.

Pipe Face and ID Features Measurement

The AGU5 gauge head features a modular design. This modularity allows for inspection of pipe face features with the FMX attachment, or pipe ID features with the IDX attachment. This data is collected at the same time as the OD thread inspection process.

Real-Time Tool Compensation

The AGU supports integration with most CNC lathes. Measurements obtained by the AGU are sent over the network to the lathe controller, which are then applied as tool offsets. This closed-loop process ensures that your products remain in a tightly controlled tolerance band with no manual intervention.

Cost

Each AGU installation is tailored to fit the customer’s manufacturing facility. Considerations of existing infrastructure, floor space, thread types and pipe diameters produced, integration with with existing systems, and even cycles times all play a key role in pricing an AGU.

As such there is no one-price-fits-all. Contact us today to discuss your requirements and let us quickly prepare a budgetary proposal for your finishing line.

Download AGU5 Cell Layout

Download AGU5 Informational Brochure

Autonomous Gauging Unit 5

Contact Autonetics today to speak directly with a thread inspection expert.

Category
Inspection
Purpose
In-Process Thread Inspection
Industry
Oil Country Tubular Goods
Threadforms
API, Semi-Premium, Premium
Supported Pipe Diameters
2-3/8" to 16"
Features Measured
OD Threads, Face & ID Features
Precision to Tolerance
< 10%
Cycle Time
< 30 Seconds