Comparative detection of automobile lamps with three-dimensional scanner
one   Industry status
  The customer's product is the car lamp. It is difficult to scan the lamp. Because many places on the lamp are transparent, and the laser of the scanner is transparent, it is difficult to scan.
two    Limitations of customers' current testing methods
  For this car lamp, the customer doesn't have any effective measurement means, and then the customer comes to us. We use hscan handheld 3D laser scanner to help them scan and measure. During the scanning process, we will spray white powder on the transparent part of the object, and through processing, present the data required by the customer completely, and submit the comparison results to the customer.
  Firstly, quickly paste the positioning mark point on the scanned air conditioner, spray the lamp with white powder, and then scan the tested part as a whole through non-contact three-dimensional laser scanning, and carefully scan the details. Finally, compare and adjust the obtained data, and make a test report.
two   Required instrument and model
   Hscan handheld 3D laser scanner Prince series.
three   Scanner working hours
  It takes 2 minutes to paste the marked points;
  Data post-processing and comparison report for ten minutes.
1 scan data
For this kind of car lamp, the hand-held three-dimensional laser scanner has incomparable advantages: first, the point non-contact scanning has no limit on the size of the measured workpiece; Secondly, hand-held scanning, the workpiece does not need to be fixed, and there is no need to specially design the detection fixture, so it can be inspected on arrival. By using our three-dimensional scanner, customers shorten the detection cycle and reduce the detection cost.
Reverse / comparative product display
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1. The unmarked shape tolerance shall meet the requirements of gb1184-80.
2. The allowable deviation of unmarked length dimension is 0.5mm.
3. Unspecified fillet radius R5.
4. All undeclared chamfers are C2.
5. Blunt acute angle.
6. Blunt sharp edges, remove burrs and flash.
1. There shall be no scratch, scratch and other defects damaging the part surface on the part processing surface.
2. The machined thread surface shall be free of defects such as black skin, bump, random buckle and burr.
Before painting, rust, scale, grease, dust, soil, salt and dirt must be removed from the surface of all steel parts to be painted.
3. Before derusting, remove grease and dirt on the surface of iron and steel parts with organic solvent, alkali solution, emulsifier and steam.
4. The time interval between the surface to be coated by shot peening or manual derusting and the primer shall not be more than 6h.
5. The surfaces of riveted parts in contact with each other must be coated with a thickness of 30 40 before connection M antirust paint. Lap edges shall be closed with paint, putty or adhesive. The primer damaged due to processing or welding shall be repainted.
3 Heat treatment of parts:
1. After quenching and tempering, HRC50 55.
2. Medium carbon steel: 45 or 40Cr parts are subject to high-frequency quenching, tempering at 350 370 , and hrc40 45.
3. Carburizing depth 0.3mm.
4. Carry out high temperature aging treatment.
4 Technical requirements after finishing
1. The finished parts shall not be placed directly on the ground, and necessary support and protection measures shall be taken. 2. The machined surface shall be free of rust, corrosion, bumps, scratches and other defects affecting performance, service life or appearance.
3. There shall be no peeling on the surface finished by rolling.
4. There shall be no oxide scale on the surface of the parts after heat treatment in the final process. The finished mating surface and tooth surface shall not be annealed
5 Sealing treatment of parts:
1. All seals must be soaked with oil before assembly.
2. Before assembly, strictly check and remove the sharp corners, burrs and foreign matters left during part processing. Ensure that the seal is not scratched during installation.
3. The excess adhesive flowing out shall be removed after bonding.
1. After the gear is assembled, the contact spots and backlash on the tooth surface shall comply with the provisions of GB10095 and gb11365.
2. The reference end face of the gear (worm gear) shall fit the shaft shoulder (or the end face of the positioning sleeve), and it cannot be checked with a 0.05mm feeler gauge. The perpendicularity between the gear reference end face and the axis shall be ensured.
3. The joint surface of gearbox and cover shall be in good contact.
1. The casting tolerance zone is symmetrical to the basic dimensional configuration of the blank casting.
2. Cold lap, crack, shrinkage cavity, penetrating defect and serious incomplete defect (such as under casting, mechanical damage, etc.) are not allowed on the casting surface.
3. The casting shall be cleaned without burrs and flash. The pouring and riser on the non machining indication shall be cleaned and flush with the casting surface.
4. The cast words and marks on the non machined surface of the casting shall be clear and legible, and the position and font shall meet the drawing requirements.
5. The roughness of non machined surface of casting, sand casting R, shall not be greater than 50 m
6. The pouring riser, flying thorn, etc. shall be removed from the casting. The residual amount of pouring and riser on the non machined surface shall be leveled and polished to meet the surface quality requirements.
7. The molding sand, core sand and core bone on the casting shall be removed.
8. The casting has inclined parts, and its dimensional tolerance zone shall be configured symmetrically along the inclined plane.
9. The molding sand, core sand, core bone, fleshy, sticky sand, etc. on the casting shall be shoveled, ground and cleaned.
10. The wrong type and boss casting deviation shall be corrected to achieve a smooth transition and ensure the appearance quality.
11. The wrinkle on the non machined surface of the casting shall be less than 2mm deep and the spacing shall be greater than 100mm.
12. The non machined surfaces of machine product castings shall be shot peened or roller treated to meet the requirements of cleanliness Sa21 / 2.
13. Castings must be water toughened.
14. The casting surface shall be flat, and the gate, burr, sand sticking, etc. shall be removed.
15. Casting defects such as cold shuts, cracks and holes that are detrimental to use are not allowed.
1. The nozzle and riser of each ingot shall have sufficient cutting amount to ensure that the forging has no shrinkage cavity and serious deflection.
2. Forgings shall be forged on a forging press with sufficient capacity to ensure full penetration in the forging.
3. Forgings are not allowed to have visible cracks, folds and other appearance defects affecting use. Local defects can be removed, but the cleaning depth shall not exceed 75% of the machining allowance. The defects on the non machined surface of forgings shall be cleaned and smoothly transition.
4. Forgings shall be free of white spots, internal cracks and residual shrinkage cavities.

DETROIT-Executives from four auto parts companies said Tuesday that they don't expect widespread fallout from a shortage of a key ingredient in plastic resin following a factory explosion.Officials with Delphi Automotive, Illinois Tool Works, AK Steel and Parker Hannifin said during conference calls to discuss their companies' earnings that a shortage of PA-12 shouldn't disrupt their operations.Automakers and parts companies have been scrambling to find substitutes since a factory in Germany that makes much of the world's supply of the ingredient suspended production after it exploded in March.The resin is used in hundreds of parts. It's most critical in fuel and brake lines because it can carry gasoline and other fluids without deteriorating.Companies that make fuel lines, brake lines and connectors have been worried they will run out of PA-12 and they may have to stop shipments to automakers and larger parts suppliers. One key fuel line maker, TI Automotive, warned last week that the auto production interruptions are likely in the next few weeks. TI and a trade group of suppliers held an industrywide meeting last week to look at the remaining supply of PA-12 and encourage faster testing of alternatives.But Rodney O'Neal, CEO of Delphi, one of the largest parts suppliers, said he sees little impact on Delphi or auto production."I don't see this as a crisis in terms of tremendous downtime at all for anyone around the world," O'Neal said. He said the auto industry is addressing the problem quickly and with flexibility.Delphi, a Troy, Mich., supplier of audio systems, fuel pumps, wiring connectors and other items, uses PA-12 in a small number of parts and has lined up substitutes, O'Neal said."We believe there's enough inventory in the channel right now to handle this," John Brooklier, vice president of investor relations for Illinois Tool Works, told investors on a separate call Tuesday. He said the Glenview, Ill., maker of metal and plastic parts such as door handles uses little PA-12 but is watching the impact on auto companies.At AK Steel, CEO James Wainscott said customers are telling the company that any shortage is likely to be a challenge mostly for European automakers in the U.S.The West Chester, Ohio, company, he said, was concerned about the problem until the last day or so."There may be some trickle-lower effect here, but we don't look for that to be a great concern," Wainscott told investors.Automakers say the issue hasn't interrupted production thus far. The shortage was caused by a March 31 explosion at Evonik Industries' plant. The factory supplied at least a quarter of the world's PA-12, and about 70 percent of a chemical that's used by other companies to make resin. Evonik has said the plant will be out of operation for at least three months.At Parker Hannifin, a maker of valves, filters, pumps and hoses, CEO Donald Washkewicz said his company isn't in the fuel line business but does use PA-12, also known as nylon-12, in air brake tubing and other parts. The Cleveland-based company, he said, has been using alternate materials."We're able to keep our customers out of trouble," Washkewicz said.But Washkewicz said the shortage could drive up the cost of raw materials used to make plastic parts.Few plastics can do what PA-12 does. The chemical doesn't absorb as much moisture as other plastics and will stand up to carrying gasoline, brake fluid and other hydrocarbon liquids. Sadhan Jana, a professor of polymer engineering at the University of Akron in Ohio, said he knows of no other plastic as as durable as PA-12.Any substitute would have to go through rigorous testing to make sure it would work for a specific automotive part, Jana says. Those tests could take months.Automakers and suppliers are close to agreeing on a fast-track process for testing replacements.The Automotive Industry Action Group, a nonprofit trade group, said Monday that General Motors Co., Ford Motor Co., Chrysler Group, Honda Motor Co., Hyundai-Kia, Volkswagen AG and their suppliers, are expected to finalize new testing standards next week. The agreement would reduce the interim approval process for new materials to three weeks from the current eight weeks or longer.AIAG said the group feels confident it can shorten the testing time because alternative resins are already well known and previous testing has accurately predicted real-world performance.