END-OF-LINE SYSTEM. DISCOM Noise Analysis for Gear Test

Transcription

1 END-OF-LINE SYSTEM DISCOM Noise Analysis for Gear Test

2 FLEXIBLE ACOUSTICAL ANALYSIS Acoustic emission identifies faults in gears. Small vibration pulses are emitted from nicks, grinding effects, or deformation. These emissions can be recorded and analysed and used to prevent rejection of the final product. In a production environment, Innovative system DISCOM system is optimized for as well as large ring gears, measured signals can be DISCOM Noise Analysis for Gear the short cycle times typical of or gears made from different produced from components Test is an acoustic measurement quality assurance in industrial materials. For each gear, a huge when testing them. Gear surfaces system for analysing and production. amount of measurements can are the major noise source in assessing gears by automatically Using the latest generation of be generated, each focussing on transmissions. DISCOM Noise checking data that is measured PCs, equipped with a unique certain gear defects. Analysis for Gear Test evaluates when turning the test gears USB-based data acquisition front Due to rotationally synchronous this surface by rolling the gear against a master gear. It includes end, you can scale the DISCOM order analysis, you can fade out to be inspected against a master applications and databases to system according to your needs. interference noise, for example, gear. The gear surface is analyzed provide detailed analysis, statistics of a master pinion. Suppressing by examining the vibration or and archiving. The applications Advantages of DISCOM Noise the tooth contact frequency the torsional acceleration in the can work for a single system on Analysis for Gear Test also makes it possible to detect test station. Nicks, surface waves its own or for a group of systems The system is capable of testing even small nicks, and you can and geometry defects can be when connected via a network. a wide range of gears, for use spectral methods to find detected. The flexible framework of the example, small planetary gears geometric defects in gears. EXAMPLE OF AUTOMATIC DEFECT ANALYSIS OF GEARS Gears to be tested are transported from the production line to the test station using different mechanical methods of transportation in order not to damage the parts during handling. At the test station, the master gear is slowly applied to the gear while the gears are turned slowly so they can engage with each other easily. The gear is turned and measured individually in both directions. DISCOM Noise Analysis for Gear Test processes the signal in real-time. The software analyses the data based on the learned limits and provides immediate pass/ fail feedback. After the test, the parts can automatically be sorted according to their status: good, defective, or re-work. This allows for parts to be automatically delivered, as well as for parts to be automatically discharged after the test. Sometimes, re-work parts are automatically passed on to refinement machines for re-working.

3 Torsional accelerometer TAC15 for shafts in test stands Good gear set Eccentricity on cam gear F i F i F i tangential composite deviation long wave component DISCOM Noise Analysis for Gear Makes it easy to do a Types of testing method is particularly useful to Test: statistical evaluation of The system is used, in particular, detect faults in gear geometry, Separates different noise the production process for for double- and single-flank gear such as cyclic running, meshing sources using rotational different time periods testing: deviations, or faults of the speed information and For double-flank testing, pitch. construction data Separating errors the gear tester runs the test Accelerometers measure the Is insensitive to interference When meshing two gears, the part against a master wheel deviation from a uniform noise of the production acoustical signal holds the without load, and the part is circular motion. You can environment and the master contribution of both gears. turned in both directions to evaluate noise-related pinion Knowing the transmission ratio find defects on both flanks geometry errors, which are Calculates order spectra and means that you can find the For single-flank testing, the translated into non-uniform time signals and deduces periodicity of each gear and gear tester also runs the test rotational speed. The sensor different measurements from thereby separate the contribution part against a master wheel measures speed changes these signals (ex Crest) with of each gear. but applies load to them in the form of torsional adaptable sensitivity Eccentricities and surface defects acceleration. Has tolerance limits and can be separated because they Double-flank testing is usually spectral limit curves based on have a cycle that corresponds done using an accelerometer Easy to use statistical data that can be to the originating gear. The on the mechanics holding the The DISCOM system is intuitive clearly administered (learned measurement system can master wheel, on single-flank and user friendly, and totally limits) distinguish the following defects testing a torsional accelerometer integrated with Windows. Uses database systems between the gears: is used. You can save and retrieve for parameter setup and Eccentricities different user profiles, and it evaluation of the production Deviation from circular shape Torsional accelerometers is straightforward to set up process Tooth spacing The single-flank torsional different access levels. Reports defects in plain text Surface waves (Ghost Orders) acceleration test simulates a In addition, you can easily that a user can easily add to Nicks pinion operating under real print, export, and share all your or modify load conditions. This testing measurement results.

4 TORSIONAL ACCELEROMETER Power transformer into rotor Opposing accelerometers measure the deviation from uniform circular motion Programming interface connector Power and data connector

5 RESULTS FROM CRANK GEAR AND CAM GEAR PAIRS The graphs show one revolution of a crank and cam gear when run as pairs on the single-flank gear tester. Any faults can be easily detected. Crank Cam_Shaft - - Crank Cam_Shaft - - Crank Cam_Shaft

6 DISCOM For the past 20 years, DISCOM has developed and distributed systems for acoustical quality analysis used in end-of-line testing, and these systems are highly respected and used worldwide by companies in and around the automotive industry. Brüel & Kjær acquired DISCOM on July 26, This acquisition enables Brüel & Kjær to better support its customers by expanding its production quality testing capabilities to end-of-line analysis solutions. Brüel & Kjær also provides networks for DISCOM to better support customers and additional resources to facilitate adaptation to the ever-evolving automotive industry. Brüel & Kjær Sound & Vibration Measurement A/S DK-2850 Nærum Denmark Telephone: Fax: Local representatives and service organizations worldwide Brüel & Kjær DISCOM Neustadt Göttingen Germany Telephone: BG ËBG WÎ 06/2017