Length Laboratory

Length laboratory
This laboratory is a professional technical department under the Metrology and Calibration Business Department of LETRI. The department is mainly oriented to the field of mechanical manufacturing and precision measurement, providing measurement and testing services for the majority of manufacturing enterprises and institutions, scientific research and testing institutions, etc. The CANS calibration/testing certificate/report issued by the department can be mutually recognized in more than 100 countries and regions around the world, and can also be used as the technical basis for legal metrological management, quantity traceability supervision, system review and approval, technical achievements identification, administrative review and legal arbitration. Now it has a measuring tool laboratory and a precision gauge measurement laboratory, including a constant temperature and humidity laboratory with an accuracy of ± 0.5 ℃. It has advanced measuring and testing equipment at home and abroad, such as XL-80 laser interferometer of Renishaw, standard ball bat of matte ceramic 3D scanner, TRIMOS high-precision full-automatic length measuring instrument of Danqing, Switzerland, and ZEISS high-precision coordinate system.
We adhere to the quality policy and goal of being scientific, fair, professional, efficient, accurate and honest, provide first-class equipment, first-class team, first-class management, first-class quality, first-class response and first-class service, and meet customers' multi-level and all-around needs of 'detection maintenance research and development' in mechanical manufacturing and precision measurement.
Featured projects
★ CMM, large CMM laser interferometer detection
★ Laser tracker, joint measuring arm, device, 3D laser scanner, various rangefinders, steel tape, π ruler (circumference ruler), magnetic grating grating ruler and other precision instruments
★ Laser tracker and laser alignment instrument
★ Large and long rods (inside micrometer), micrometer measuring rod, tower ruler, etc
★ Super large inner micrometer
★ Perpendicularity of square, wide seat square, cylindrical square and large workpieces
★ Large size cylindrical angle ruler, etc
★ Straightness of large workpieces such as flat ruler, square ruler and marble slab
★ (0-80) Spatial coordinate measurement of various workpieces, moulds and scales
★ Length measurement: measurement of gauge block, external dimension and internal dimension
★ Angle and taper measurement: angle, taper, levelness and circular division error
★ Shape and position error: straightness, parallelism, roundness, cylindricity and profile; Parallelism, verticality, inclination, coaxiality, symmetry, position, runout, etc
★ Calibration and detection of various special shape gauges for railways, subways and high-speed railways
★ Including: special sample plate for railway, special measuring instrument for railway wheel and rail, special measuring instrument for railway, etc
★ High precision CNC/traditional machine tools and machining centers
★ Various CNC/traditional turning, milling, planing, drilling, grinding machines, machining centers, rotary centers, five/six axis centers, industrial robots, etc
★ Various complex workpieces, box type parts, molds, etc
- Length of workpiece
- Geometric form and position evaluation
- Roundness and cylindricity
- Flatness, straightness and parallelism
- Verticality, position, etc
★ Automobile manufacturing, mold manufacturing, equipment manufacturing, product appearance of various parts, etc
★ Fast/accurate measurement of various lengths/gauges
- High level gauge block
- Precision length rods, calibration rods
- Standard ring gauge
- Needle gauge
- Threaded ring/plug gauge
- Lamp cap/holder gauge
- Internal and external length of ruler, watch, etc
★ Fast/accurate measurement of surface roughness/profile of various materials
- Plastic
- Ceramics
- Metal
- Paper
- Polymer materials
- Laser rail surface
- Machined surfaces
- relevant roughness/profile measuring instruments
★ Quickly/accurately measure the roundness, cylindricity, straightness, parallelism, etc. of cylinders, circular holes and other rotating objects
★ Roundness of standard ring gauge
★ Roundness/cylindricity of shaft/hole parts
★ Quickly/accurately measure the thickness of metal coating on various metal workpieces, such as:
- Copper plating thickness of circuit board
- Thickness of eye bracket coating
- Thickness of alloy coating
- Plating thickness of gold and silver ornaments, etc
★ Analyze the metal composition of materials
★ At the same time, carry out calibration and detection services for relevant thickness measuring instruments
★ Cylindrical thread plug gauge, cylindrical thread ring gauge, tapered thread plug gauge, tapered thread ring gauge, smooth surface ring gauge, smooth surface plug gauge, Edison lamp cap/lamp holder gauge and other internal and external dimension gauges
★ Measurement of functional pitch diameter, single pitch diameter, major diameter, minor diameter, pitch, tooth half angle, tooth profile deviation, profile angle, taper and other parameters (comprehensive measurement of full parameters)
- Measuring small hole thread
- Measurement of super small pitch
- Standards of China, the United States, Britain, Japan and other countries
★ Straight/helical gear measurement, rectangular spline straight sided spline, worm/turbine measurement, gear set, sector gear, gear shaper, shaving cutter, hob and broach, unknown gear/spline, positioning hole or keyway position measurement, gear surface roughness, etc
★ Measurement of indexing, tooth profile, tooth direction, pitch, tooth pitch, pitch line runout, span bar distance, tooth thickness and other parameters
★ In the semiconductor, LED, microelectronics, and microcomputer electrical components industries, the three-dimensional surface profile, surface roughness, radius of curvature, step height, 30 nm~1.5 μ Measurement of transparent film thickness of m
★ Micromeasurement with 1000 times scanning electron microscope
★ For biomedical, chemical, building materials, MEMS, precision optical devices and other fields
★ Precision measurement of geometric shape of ultra fine plane, spherical and aspheric devices (optical elements, molds, standards, etc.)
★ Measuring surface category: secondary aspherical surface - ellipsoid, paraboloid, hyperboloid, cylinder, cone, flat ellipsoid; Higher order aspheric surface - monotone surface, non monotone surface; Spherical surface, plane, etc
★ It has various testing standards for optical and mechanical precision instruments, has carried out various series of precision projectors, image measuring instruments, various industrial stereomicroscopes and various projects with optical measuring instruments, and can provide relevant testing, calibration and consulting services for colleges and universities, research institutes, hardware, electronics, plastics, precision ceramics, PCB boards, auto parts and other industries
★ Other shape precision measurement schemes
－ Measuring block － Endness reference gauge
- Inspection and repair of universal measuring tools
- Various length and thickness measuring instruments
- Precision blister, level, laser marking instrument and angle sensor
- Detection of workpieces with complex shapes
★ Manufacturing and measurement system, site planning scheme
★ "Integration of measurement expert knowledge" - integrate our rich professional experience in mechanical manufacturing and precision measurement and the advantages of complete measurement system integration into your production, measurement and quality control process quickly and efficiently, and transform them into your development advantages. Help you to design a more efficient, reasonable and accurate measurement system, and provide the best solution to meet your manufacturing, assembly, measurement and budget needs.
- According to the customer's short, medium and long-term development needs, provide the measuring instrument configuration, model selection, planning and commissioning scheme for the planning, production, assembly and testing sites
- Equipped with a large number of precision measuring equipment to track the whole process of construction, installation and commissioning
- Provide follow-up training, maintenance, upgrading and management plans
- Provide online measurement and control scheme for personalized measuring equipment and environment