Defects Analysis and Countermeasures of Cylinder Blocks Cast with Green Sand Mould and Cold-Box Cores
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The reasons causing the casting defects occurring during the development process of Volkswagen series cylinder blocks were analyzed and their relevant solving measurers were proposed as follows:(1)The measures to prevent local fracture of jacket core include:using special sand as the substitute for the silica sand,improving coating process of cores,strictly controlling process parameters of raw materials and ensure the cores having sufficient strength;(2)The measures to prevent scab defect on the outer wall of jacket,i.e.on the top surface of block,include:using natural natrium clay as the substitute for a part of artificially-activated clay,shorting the duration the outer wall of the jacket core suffering hot-radiation,reducing gas evolution of the core sand and increasing venting efficiency;(3)The measures to avoid metal penetration occurring on the outer surface of the cylinder block include:decreasing sand granularity,increasing the resistance of the gaps between sand particles,increasing the gas back-pressure of the sand mold to prevent metal liquid penetrating into sand-gaps,controlling temperature and moisture of the sand to reduce hot burning-on defects of the casting,optimizing parameters of the molding sand,etc.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it