Steel Barrel Forming Technology

Fifth, the drums roll package with process method
1 roll package with machine
Steel drums seaming process is carried out on crimping sealer . Drums at home and abroad curling sealer type very much, summed up as follows : Press the drums on the device when the position of the seaming points, there are vertical and horizontal sealing machine sealing machine ; according to the production efficiency of with automatic sealing machine , semi-automatic and manual sealing machine sealing machine ; while sealing in accordance with the number of points, there are single and double head sealing machine sealing machine ; according to different shapes of steel drums , drum sealing machine and shaped a barrel sealing machine ; sealing machine according to the transmission mode can be divided into mechanical and hydraulic sealing machine sealing machine . Regardless of the type of sealing machine, the sealing portion of the principles and procedures are the same .
As for domestic common horizontal assembly machine structure diagram and working schematic. Mainly from the base, about transmission, wheel system , feeding device , about the guide plate and the hydraulic system and electrical control system components.
Base for the steel plate welded structure , with cast iron rails at the top , left and right side sliding headstock along the rails .

Horizontal double-headed drums roll package with machine structure

Horizontal double-headed drums seaming machine operating principle
Spindle box for welded structure, top with the motor , the belt , the electromagnetic clutch brake , gear transmission , intermittent rotation of the spindle . Front spindle is fitted with top plate , top with its two hydraulic cylinders driven rollers . Road through the head , two rollers were in contact with the top plate so that both ends of curling sealed drums . The retreat headstock driven by hydraulic cylinders , and may need to adjust the position of the proximity switch to control the headstock stroke .
Feeding device is unsealed barrels are automatically sent to the bottom of the barrel manually feeding rack , lid placed on both ends of the barrel body , controlled by the proximity switch , feeding cylinder moves into the barrel body between the headstock ,two headstock relatively forward, clamping steel drums , on the rack along reset.
Two crimping roller mounted on the upper end of the headstock , the first channel between the roller and the two rolling a certain distance ( angle ) , the hydraulic cylinders push the rollers slide along the up and down movement . Roller material is generally GCr15, heat treated lipped channel position to be HRC58-60.
Left and right guide plate is based on the length of the barrel body is fixed to the front end around the headstock lathe bed . Transporting the drums after crimping to the specified area.
Crimping assembly machine operation , generally have two kinds of manual and automatic operation . The knob switch to the manual position , for stand-alone debugging , single-action components , troubleshooting , etc. Will be allocated to the automatic position knob for continuous production of automatic control.
2 , seaming rollers
The shape of the curve wheel bead size and shape plays a decisive role . But the wheel is designed to be more complex , influenced by many factors , most experience . But one thing is certain, regardless of the five-story rectangular curling , curling or seven arcs , in theory, should be shaped arc involute experience more reasonable , more practical shape , are relatively close involute law . Because true involute difficult to process , so we used the roller curves are based on the proximity involute composed of a plurality of arcs and beveled .

Seaming roller working curve
Shown to be a practical triple seven crimping head and said wheel arc shape of the curve . Figure ed segment is inclined , seaming , the barrel top and bottom edges of the first contact is this surface . α angle is an important parameter for the head and said roller is , α angle is too small , easy to accelerate the wear of rollers and curling barrel top is easy to produce "Outer Volume" phenomenon, in the arc segment forming more sudden ; α is too large , then the impact on the normal arc segment shape. Generally between 7 ° ~ 9 ° more appropriate .
Crimping cd figure transition section is , should the bucket lip forming logical deformed under normal circumstances, the radius of curvature should not be too large, too large a radius will cause trouble lower bead shape , resistance is too large , easy to form a hysteresis shape . Radius is too small , easy to form ahead of forming, achieving the desired objective .
Cb figure forming section segment is curling , crimping through this section to make the required size of the arc , which determines the level of the bead and the tightness of the number , the larger the radius , the larger the size into a round roll , with more loose , the gap between the layers is greater , the more good sealing performance ; radius is too small , because the subject material thickness constraints, can not accommodate the material , it is difficult to crimp barrel portion and abutting the top vertical wall , a notcompleted curling.
Drawing a straight line segment ab segment , head Dacron After the crimping rollers easy exit.

Involute schematics
As for the seaming roller theoretical curve, the shape of an involute . The curves can be used for curling rollers , generally take φ angle from 0 ° ~ 180 ° between ( that is, from 0 ~ π between ) the corresponding curve . Crimping different requirements , the base circle radius r should take a different value . The size of the r value and the material thickness and number of layers seaming , seaming requirements related to the size . In general , be estimated by the following formula :

Where : r - involute base circle radius ; t - drums material thickness ; n - seaming layers , for five rectangular curling , n = 5; For seven arc curling , n = 7 .
These rollers are designed for primary forming roller ( Head Road rollers ) , with respect to two wheels , the design is simple, that is in accordance with the size and shape of the final production, as long as I can curling compaction on the line , as the shape , he can choose according to personal preferences .

Head and said seaming roller trough Figure

Two seaming roller trough Figure
According to our theoretical design shown , using the theory of curvature of the arc closest to simplify the labeling of one pair of crimping rollers shapes and sizes . The reason to do so , as is more convenient processing wheel trough , which is our traditional marking methods . Generally speaking , the first under the pattern size made ​​into a template templates used to process test in grooved rollers , and rollers in the sample processing , as much as possible to achieve high accuracy requirements, rolling groove surface as smooth. Wheel machining tool steel used , the first roughing, re- heat treatment , and then grinding, so the wheels more durable.
In actual production , crimping rollers groove dimensions with many parameters, so the design of the grooved rollers , including many practical experience , which we continue to study the crystallization of years . Crimping wheel shape and geometry are bottom of the barrel with the barrel body and roof material thickness variation parameter , depending on the product and production determine the actual situation . Wheel size is designed grooved steel drum manufacturing technology is the most important core technology , mastered it, you can greatly reduce the occurrence of quality problems curling .
About the size of seaming process related issues , we will be back devoted .