X ray flaw detector produces medium application in Die Casting

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X ray flaw detection applies in producing a course, as detect advancedly the method is product quality rise, had the effect that cannot ignore, make the spot detects from the exterior visual promotion arrived in-house flaw detection is microcosmic detect, make the product quality of my company takes the person's new level. This solved the problem that percent defective cannot reduce for Die Casting not only, and the competition that still makes the enterprise had sturdier confidence and ability to face the market, meet new challenge bravely. Key word: Flaw detection of ray of X of Die Casting production applies Die Casting of article introduction know clearly to produce medium X ray flaw detection to apply. The car component that my company produces 1 foreword, basically be weather strip, structural member and safety, its interior stoma and problem of in-house shrinkage cavity become the main factor that the product discards as useless. Weather strip is to point to the spare parts that is in next certain and oppressive passing to try close-grained check to be not divulged, its interior stoma is the main contributing factor of its percent defective. Structural member is the spare parts that points to a fixed, action that prop up, as a result of structural need, integral wall is large inhomogenous, product interior shrinkage cavity is the main contributing factor of its percent defective. Safe it is to point to be in truckload the part that after assembling, concerns with person safety, its quality grade asks to reach the 2-2T level of the definition in ASTM E 1025, requirement of its interior blemish is extremely strict. At present my company decides increase of odd-numbered days profit, to assure and improve the quality of the product, satisfy the requirement that batch produces, better detect the internal state of affairs of the spare parts, detect the result must be accomplished seasonable, accurate, for this my company uses device of X ray flaw detection.   of principle of flaw detection of 2 X ray (the ray of characteristic   X of 1)x ray is the electromagnetic wave with a kind of very short wavelengh, it is a kind of photon, wavelengh is 10-6~10-8cm, x ray has following characteristic: The material that ray of X of ① penetrability   can penetrate place cannot pass through general visible light. Its are penetrable of ability lose by force, concern with the wavelengh of X ray and the density of material be penetratinged and ply. X ray wavelengh heals short, penetration heals big; density heals low, ply heals thin, criterion X ray heals easy penetrable. In real work, the voltage bend over that is in charge of through the ball is worth (the penetrability that the bulk of KV) will come decide X ray (namely the qualitative) of X ray, and with the electricity of X ray is being carried inside unit time (the quantity of the ray of product delegate X of MA) and time. Ray of X of ② ionization   or other ray (for example γ ray) when be being absorbed through material, the element that can make constitute material is decomposed become anion, call ionization, the X ray that more or less absorbs ionicly with material estimates direct ratio. Produce ionization through air or other material, the rate that uses appearance to measure ionization can be calculated the quantity of X ray. Detect facilities comes true to detect to spare parts flaw detection just about from this. X ray still has other action, wait like sensitive, fluorescent action. (2) is video form line of principle   X video formation fundamental, it is the sends density and ply difference be caused by of the character as a result of X line and spare parts. Because be in Die Casting process, of the spare parts shape to be able to change because of state of craft parameter, machine tool and differ somewhat, the spare parts ply after shaping accordingly, send density to also have difference, and illuminate of classics X ray, its are absorbed reach measure through X ray different also. Consequently, have on clairvoyant fluorescent screen shine to be divided silently. Watch 1 for the spare parts large difference and X ray concern videoly. Graph the 1 spare parts that is X ray fluoroscopy is video. Device of 3 flaw detection carries out medium applied   in production 3.

Device of 1 flaw detection shapes to Die Casting the action   that craft and mould design improve place to rise (1) is safe -- the slide block of Shanghai De Erfu (description of process of 1) of   of graph 2)   tries first pressure, die Casting undertakes on machine of force strong 160TDie Casting, have a test by the following parameter: Pressure shoot pressure 100MPa, high speed 2.

6m/s, low speed 0.

15m/s, press slow shoot journey 300mm, leave modular time 3s. Blemish of 2) of Nextpage     analyses a basis flaw detection image (graph 3) shows, can see on cast a lot of scattered the window that distributing (in the) inside part principal part, this explains, cast interior much stoma, organization is few and far between, shape bad. 3) fashions process of Die Casting of reason   ① in, gas of the be involved in when spray, form temperature of mould of ② of   of stomatic;   too low, ③ of   of   of not smooth; presses metallic current firing rate is spent insufficient, fill is inadequate result of exhaust of ④ of;     is bad. 4) improves measure   ① to adjust Die Casting craft, reduce quantity for spray, increase the time that blow air, increase to press firing rate quickly to spend ② of;     to change a pattern, improve horizontal runner, ; of the runner inside broaden raises its cut area, reduce ③ of   of   of fill obstruction; to increase exhaust duct (graph 4) . 5) result undertakes Die Casting by craft, image of repass flaw detection (graph 5) and before (graph 3) is comparative, the effect had clear improvement. Through contrasting with standard of ASTM E 1025, accord with product demand. Current, this spare parts lies batch stage of production, detect through daily character flaw detection, made sure product quality asks. (2) structural member -- day produces the whole world to purchase (bracket) description of process of     1) tries first pressure, the following parameter is pressed to have a test into travel Die Casting on machine of DC 800CDie Casting (pressure shoot pressure 80MPa, high speed 2.

7m/s, low speed 0.

3m/s, press slow shoot journey 400mm) analysis of blemish of     2) shows according to flaw detection image, can see on cast a lot of scattered the window that distributing (inside part principal part, pursue 6 rounds give place) , because this are 300180x200; ,weigh 2.

5kg, graphic representation place estimates the largest position for treatment, coil easily gas, easy form shrinkage cavity. According to this chart analysis, this place is bigger shrinkage cavity more. 3) of Nextpage     fashions process of Die Casting of reason   ① in, gas of the be involved in when spray, runner of mould of ② of   of bad;   designs exhaust undeserved, ③ of   of   of; of inadequacy of this place fill presses firing rate to spend insufficient, fill is inadequate. 4) improves measure   ① to adjust Die Casting craft, increase the time that blow air, increase to press firing rate quickly to spend. ② changes a pattern, improve horizontal runner, broaden, add thick inside runner, raise its cut area, reduce fill obstruction; to increase runner of a branch to locate stuff to this directly. 5) result undertakes Die Casting by craft, image of repass flaw detection (graph 8) and before (graph 7) is comparative, the effect had clear improvement. After the cast after changing passes treatment, there are a few small air holes on treatment face, the cast before accord with product demand; basically and changing, to affirm its are in-house place shows quality and flaw detection image to whether agree, via confirming after treatment: On treatment face, appear apparent shrinkage cavity and the stoma that exceed 2mm. Change around contrast, can see detect through flaw detection, can sentence the in-house character that decides cast well and truly, will take to this solve a problem relevant measure, in time, can reduce finished cost and the percent defective that drop a product. 3.

2 nondestructive detect weather strip -- Wuhan this product passes a conduit of this cropland already smoothly phase sending sample, already took person batch stage of production at present. Because this product is weather strip, leak problem is the main problem that creates waste product, and the main reason of leak is stomatic problem, accordingly character assures is in order to check frequency second come pilot, uses method is every from beginning to end each smoke to undertake checking. Graph the 9 flaw detection image in be manufacturing process, show organization of interior of each spare parts is even and compact in the graph, wait for blemish without stomatic, shrinkage cavity. Affirm qualification with quality of this pair of this products, course treatment and try leak working procedure, arise without the problem. See from this: Through the use that X ray flaw detection detects, reduced the waste product that the in-house limitation that produces because of Die Casting creates greatly, solved the problem of process capability insecurity basically at the same time, assure the successful production of the product thereby. 4 conclusion pass practice proof: X ray flaw detection applies in producing a course, as detect advancedly the method is product quality rise, had the effect that cannot ignore, make the spot detects from the exterior visual promotion arrived in-house flaw detection is microcosmic detect, make the product quality of my company takes the person's new level. This solved the problem that percent defective cannot reduce for Die Casting not only, and the competition that still makes the enterprise had sturdier confidence and ability to face the market, meet new challenge bravely. CNC Milling CNC Machining