Product Quality Case Study PDF2019亚洲小姐冠军fnfjbfjfnfghjjhff
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1 quality problem case analysis presenter Liu Pengcheng 21, out of the pool found that the steel bar ejected, broken ribs to pile ring cracki回到家觉得 not lift 3?1, when pulling the value结婚喜讯： of zhang pull or not horizontal pull 2, cage rib length of the main rib is not the same stress concentration caused by 3, cage skeleton rolling welding spot point too deep main burn 4, when the main rib misalignment or distortion when the cage. 41, the steel itself material problems have brittle phenomenon of rebar cross-sectional component analysis or there are impurities, cracks and other defects of rebar in the production process heat treatment, tempering and other process problems in the stress, temperature, humidity effect of the next life mouth fracture. 2, rebar does not reach the time limit on the use of rebar unstable production show. 5? Solution operation aspect 1, strengthen the training of zhang puller strictly in accordance with the Zhang pull process system 2, strengthen the cage control 3, the end surface uneven head plate or bent screw replacement or repair 4, strengthen the inspection, maintenance and maintenance of zhangpull equipment 5, increase the monitoring strength of the cage to standardize the operation of the welding machine 6, Strengthen training to improve the level of staff operations. 61, strict implementation of the "first-come-first-use" principle to be used until then put into use 2, immediately stop the use of the relevant batch number rebar after the problem to find the reasons for timely notification of manufacturers to communicate to deal with 781, with steel underfeed length not according to the standard horn mouth is too large or small 2, pile hoop strap type is not in place or not shaped 3, The two ends of the tube mold did not clean up a large number of sticky cement block 94, the mold was pressed by the material or collided 5, the tail plate did not close to the tube mold on the cloth when pulling friction, squeeze 6, screw bend eccentric pull. 7, pressure-type process, quality is not good rigidity. 8, tube mold long-term use of head irregularities and so on. Material reason 1, with steel soft pull strength is low 101, control the inspection of the holding hoop plate into the factory and timely communication with the manufacturer to solve 2, regularly with the length of the steel material sampling timely adjust the length of the hoop plate and the pressure type of the hoop plate to ensure the round ness and size of the horn mouth 113, strengthen the whole type, clear mold staff training specification operation 4 , strengthen the cleaning of both ends of the tube mold and oil 5, cloth when both ends full in the middle even two ends of the pile must not be too high to fit the mold when the hugging hoop board must not have debris and other debris and ensure that the collision 6, cloth before checking whether the tailplate is close to the tube mold is not in place in time to adjust. 12131, the end plate itself material problem end plate itself flat ness of the length of the large silk tooth partial 2, cage rib length is not one, than iron is not in place caused the cage rib end side tilt 3, tailplate not close to the tube mold on the pull in advance zhang pull value pull 4, zhang pull not horizontal pull screw bending loose directly caused the pull when the eccentric phenomenon 145, Tube mold deformation head, tail plate uneven tube mold two ends bonded waste grass rope did not clean up 6, bezel unqualified positioning pin unqualified only part of the positioning pin and can not rely on the tube mold inner wall in cention when there will be a swing bezel diameter is not large enough when the cover mold can not be well leaned against the bezel so that the tube mold misalignment bezel can not be flat by the tube mold indirectly caused by the end plate tilt 7, There is no symmetrical release. 15? Solution 1, strengthen the control of the quality of the end plate into the factory 2, increase the supervision and inspection of the cage drib shop to the length of the material and end surface tilt strictly control 3, strengthen the training of plastic surgery staff must be pipe tailplate fastening tube mold to hang the cloth to the front of the table. 4, timely check the matching of screws and screw holes on the wear of serious or excessive screws timely replacement of the screw hole is too large or small end plate timely notify manufacturers to carry out rectification 165, replace the new bezel bezel diameter with a larger positioning pin with 4 and can rely on the tube mold inner wall all screw strict inspection found bending, deformation of the immediate replacement 6, Prohibited to pull 7 in advance, irregularly on the demolition group site to organize to ensure the flatness of the site 8, to call the release of the 9, check the tube mold zhang pull area oval degree of the mold timely mold repair 174, the appearance of the head quality 181, the shape of the head does not meet the process requirements 2, shantou pressure, temperature debugging improper 3, In the process of the head, the clamp holding force is not enough to cause the head is not qualified and has been made into a cage band easily pull through the end plate. 191, immediately remove the re-welded cage rib skel现实 way 面对现实eton 2, trace the number of the head machine with the batch of the production of steel bar hoe whether there is a similar phenomenon 3, strengthen the sampling force to control the quality of the head 4, regular maintenance equipment to ensure the normal operation of equipment 5, strengthen the现实 way 面对现实
monitoring of the handle to put an end to the value of Zhang pull. 20211, sand, stone moisture content is not adjusted in time 2, the raw materials in the stirring exceedthed the specified error range to make the material too small 3, cloth material did not do the fabric according to the process of full middle uniform 224, interpolated not compact 5, zhang pull plate no positioning or lack of positioning pin. 6, centrifuge not horizontal tube mold deformation eccentricity 23? Solution 1, rainy day timely adjust the sand moisture content to avoid causing the phenomenon of less sand and stone actual weighing 2, timely mixing and building used scale to verify 3, according to the cloth order of the cloth to do two full middle uniform 4, strengthen
Fabric staff training strictly in accordance with the process procedures to operate the pipe mold two heads of the material should not be too high cloth on the one hand to prevent the mold is not strict on the other hand also prevent the middle less material to avoid increasing the pile body cut-off area. 245, adjust the reasonable centrifugal process 6, control the material and ease 7, when the tension of the tension pull when pulling the tension 8, timely complement the positioning pin on the pull-up plate. 9, require the workshop to beat serious tube mold timely repair 10, the joint mold staff to interject. But the plug can not be too dense 25261, cage band rolling welding quality poor welding not secure resulting in loose 2, untied group of untied employees to tie loose cage ribs 3, hanging cage ribs into the tube mold when the hanging point position is not correct or direct hand lifting cage ribs into the tube mold caused by loose 274, Before the cloth when the feeding staff do not tie awareness or did not check whether the cage ribs are loose on the cloth 5, wire pull times too little unreasonable cause iron wire hard rolling welding is not fast. 6, cage rib tube mold distortion 1, procurement wire hard caused by rolling welding is not fast easily dispersed. 281, the development of a reasonable drawing process to ensure the quality of the drawing. 2, solder ingress when the rolling machine current adjustment to the appropriate current operation 3, cage ribs when lifting point to be appropriate 4, the demolition area found cage ribs loose in time to tie 5, table cloth when checkwhether loose cage ribs and tied to re-fabric 6, cage ribs in the mold straight to prevent the pull cage loose. 29301, material and ease of poor as thick material sand, gravel too large, low sand rate, material thinning over large, sand and stone moisture content is too large 2, second water after mixing time is not enough concrete stirring uneven 3, centrifugation did not strictly follow the process procedures such as advance braking shortened high-speed time 4, centrifugation process tube mold serious beating 315 , will be scattered in the flat car too dry or water too much material shoveling after concentrated placed in the tube mold a 6, sand fine-cut mode is not controlled sand over coarse 7, the stirring time is too short unevenly leading to local hydrating heat too high 8, hanging mold into the pool when a serious collision occurs. 9, steam at the end of the steam ingesting pipe crack in the steaming pool to form a punching force caused the end of the pile wall collapse 32? Solution 1, according to the quality of the sand and stone in a timely manner adjusted with the control of water consumption and water reduction agent doping 2, strictly control the collapse of the crucible and second water added after stirring uniform discharge 3, serious beating pipe mold timely mold repair 4, Keep the flat car moist and unclear water scattered in the flat car of the material timely shovel in the pipe pile non-encrypted area 5, pipe mold into the pool is strictly prohibited collision 6, urge the workshop to regularly check the condition of the steaming pool steaming tank steam pipe timely maintenance of the steaming pool broken steam pipe 33341, steaming pool heating speed too fast 2, mixing and machine hand playing unstable material quality problem sleddion quality caused by 3, The soot is too thin than the large material. 4, centrifugal process unreasonable internal layering serious. 351, the process to modify clear what time the temperature rose to how much degrees 2, strengthen the steaming pool to see the pool personnel for the gas situation tracking. 3, strengthen mixing and machine hand feeding situation tracking.4, the development of a reasonable centrifuge process. 36 nine, the inner wall hanging pulp 37? The cause of the quality problem describes 1, sand, stone mud content exceeds 2, the sand rate is too large assembly than too small. 3, high-speed centrifugal? 386, centrifugation process tube mold serious beating centrifugal high speed too short speed too low concrete inner wall is not hard or structural lysing 7, cement and water reduction agent match poor cement mineral C3A hydration fast hydration heat, a large number of adsorption consumption water reduction agent. C3A8 appears thick and thick. 391, strictly control the quality of raw material sand and stone with large mud content of gravel to be flushed 2, control sand stone grade distribution, sand fineness module and sand, stone mud content reasonable adjustment sand rate 3, in the case of ensuring quality to properly reduce the surface area of cement and external mixing and material, and cement standard consistency water consumption 404, Timely repair of the serious beating tube mold 5, according to the actual situation to develop a reasonable centrifugal system 6, require cement plants and water-reducing agent manufacturers to jointly solve the matching problem 7, standardized process operation to improve the operating level of employees. 410, inner wall dew stone 421, the needle flake content in the gravel more large stone more than gravel grade with too large 2, plug tail plate when too full of centrifugal when the stone can not be smoothly settled caused by dew stone 3, centrifugation is not smooth centrifugal, especially in the high-speed stage may be tube mold deformation or centrifuge problems caused by the tube mold beat serious 434, Centrifugal system unreasonable medium speed time is too short 5, the material hit too thin 6, concrete with less sand rate than unreasonable cement use low gravel partial ambassador mortar volume is less than or close to the gravel clearance rate or although the clearance rate has exceeded the clearance rate but the opening coefficient is not enough to consider the local dew phenomenon. 441, control the needle flaky content and stone in the gravel
Sub-size, grade matching to be reasonable 2, insert material to be full can not over-insert 3, timely mold repair serious beating tube mold 4, according to the actual situation to develop a reasonable centrifugal system 5, control the collapse of concrete 6, standardized process operation to improve the operating level of employees. 451, waste pulp is not exhausted, waste pulp can not come out 46? The cause of the quality problem description 1, the crane hand lazy waste pulp did not pour or pour waste pulp time is not enough 2, the waste pulp after the unstable centrifugal centrifugation can not come out 3, cement mineral composition C3A content is too high 4, gypsum doping unreasonable 5, cement and water reduction agent does not match 6, The amount of mud in the aggregate is too large 7, do the joint with the joint in which the interconnector connecting rod for the solid part of the centrifugation after the fall of the residual pulp steaming after the residual pulp hardening affects the appearance of the square pile quality. 471, increase the control of mixed material slygassion 2, the crane hand to do a good job of training work 3, the use of new connectors we 250 piles of the kind of 4, not resolved before taking the method of increasing the amount of water reduction agent doping and other methods to increase the liquidity of the material. 48twelve, pile body sticky skin, hemp 49? The cause of the quality problem 1, the sticky skin is mainly due to the mortar and stone interface bonding strength is lower than the mortar and steel mold bondstrength caused. Tube mold removal when the anti-pressure strength is generally about 50Mpa at this time bondstrength strength is about 45Mpa glossy steel and bonding strength about 3.8Mpa do not apply release agent when the bonding strength of the two are very close to the improper proportion of the preparation of spray uneven release agent or not spray edgthe release agent does not effectively isolate the steel mold and crucible will lead to bonding 2, Match than improper release strength did not meet the requirements 3, cement or release agent itself there are quality problems such as cement water, cement strength is not up to standard 4, sand in the mud content or mud content of heavy concrete fluidity difference of 505, has been sticky skin tube mold did not clean up again was used 6, The tube mold over-cold spray after the stay time short isolation film is not firmly before pouring centrifugal membrane layer damage and stick skin. 7, from the heart of low-speed over the bottom, too long, especially low-speed centrifugal force is less than a gravity acceleration caused by a long time in the steel mold rolling easy to isolate the membrane damage. 8, mixing and floor filling stoking did not mix evenly. 9, the long-term use of steel mold after the surface rough tube mold internal uneven presence of hemp rust and other defects lead to increased bonding strength of the surface. 10, steaming pool steam pipe damage or blockage caused the temperature of uneven tube rib plate condensate in the steaming pool, causing the tube mold temperature is uneven.