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Analysis and handling of abnormal in drawing process

Author: CablePublication time:2018-08-13 14:31:54Hits:295SML

Tensile strength, elongation, bending and other mechanical properties are unqualified, raw materials are unqualified, qualified raw materials are selected, temperature rise in the process of wire drawing is controlled, resistivity is unqualified, mainly raw materials are unqualified, followed by inappropriate annealing...
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 a、Broken line
Unfastened joint---------- --------------------------------------Improving welding quality
There are impurities in wire------------ ---------------------------------Strengthening the acceptance of raw materials
Unreasonable allocation--------------- -------------------------------Mould adjustment
The shape of the die hole is incorrect or not smooth-----------------------------Mold repair
Drum upper pressure line --------------------------------------------Adjusting number of coils on drum
Poor lubrication-------------------------------------------------Check lubrication system

b、Incorrect size and shape
Die wear--------------------------------------------------Replace the mold
Wire drawing ------------------------------------------------Adjusting the mold to improve the lubrication effect
Use of the wrong mold--------------------------------------------------Replace the mold
Die skew ------------------------------------------------Pay attention to setting up the upper die, and repair the die base.

c、Scrape, bruise, scratch
There are jumpers on the cone drum ------------------------------Surface trimming of drum wheel
There are grooves on the drum ------------------------------------------Remove drum to repair polishing.
Wires collide with each other ------------------------------------------The line should be placed in the form of "T" and should be separated from each other during transportation.
Overcharge-------------------------------------------------Footwall as stipulated

d、Leather, pit, triangle, burr
Poor lubrication--------------------------------------------------Improving lubrication effect
Drum wheel is not smooth------------------------------------------------Polishing drum surface, adjusting the mold.

e、Ripples and Serpents
Mismatch of mould---------------------------------------------------Adjustment and distribution model
Serious vibration of wire drawing machine------------------------------------------Repair and reinforcement equipment
Wire jitter is strong---------------------------------------------Adjust the tension and maintain the steady speed.
The shape of the die hole is not suitable -----------------------------------------The length of the sizing area should be right, not too short, or even not.

f、There are continuous scratches on the wire.
Wire scraping -------------------------------------------------Check all parts of contact with wire, such as guide wheel and line bar.
Too high lubricating fluid temperature ---------------------------------------Strengthen cooling
High alkali content of lubricants-----------------------------------------Regular tests, keep lubricant ingredients and ensure cleanliness.
The die hole is not smooth and defective ----------------------------------Strengthen the repair and management of moulds, and do not use the unqualified moulds.
Die hole lubrication zone blocked--------------------------------------The lubricating fluid is filtered to eliminate various impurities in the lubricant.

g、Oxidation, waterlogging and oil pollution
Too high lubricating fluid temperature------------------------------------------Ensure sufficient supply of lubricating fluid and strengthen cooling of lubricating fluid.
Splash of lubricating fluid------------------------------------------------The blanking line is used at the exit of the finished product line
Storage site is not clean------------------------------------------Adhere to 7S management to ensure workplace cleanliness.

h、The collection line is full, biased, messy, tight and loose
Improper adjustment of wiring --------------------------------------------Adjust the width of the line and the position of the line according to the specifications of the take-up.
Improper take-up tension---------------------------------------------Adjusting take-up tension and take-up speed
There are faults in the wiring mechanism------------------------------------------Careful observation and timely elimination
Irregular reel---------------------------------------------Selection of qualified wire tray on board
Overcharge --------------------------------------------------Strengthen surveillance

i、Unqualified performance
Tensile strength, elongation, bending and other mechanical properties are unqualified, raw materials are unqualified, qualified raw materials are selected, temperature rise in the process of wire drawing is controlled, resistivity is unqualified, mainly raw materials are unqualified, followed by inappropriate annealing process.

2018-08-13 295Views
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