? drum device is a lifting mechanism in lifting machinery winding steel wire rope components, is also an important force components.
Classification of drum groups
The drum group is classified from the material, according to the size of the lifting weight and the working condition, it is divided into casting drum and steel plate welding drum. Casting drum is generally used for equipment with small weight, the use of gray cast iron not less than HT200, the important drum uses high-strength cast iron or ductile cast iron; If cast steel must be used, it should not be less than ZG230450; The welding drum is mostly used for the equipment with large weight and large size of the drum. It is made of Q235 or Q345 steel plate bent and welded. It is light in weight and suitable for single production and large size drum.
The drum is divided into light drum, spiral drum and parallel folded drum. The outer circle of the drum is a cylindrical surface of light, and the cordless groove on it is generally not used. Spiral coil that is, the spiral rope groove is arranged round and orderly outside the coil. The spiral coil is used for the single-layer winding of the steel wire rope, and the spiral coil is sometimes used for the double-layer winding of the steel wire rope. The outer round rope groove of the folding drum is composed of a straight rope groove and a diagonal (helix) rope groove, which is exactly the same position on the drum, reducing the friction of the wire rope, and it can better make the wire rope on the drum to achieve neat multi-layer winding.
The processing process of the drum group
1. The process flow of casting drum set: wood mold → molding → core making → casting → testing → annealing → rough turning → inspection → welding (docking)→ inspection → annealing → finishing turning → inspection → acceptance
2. The process flow of steel plate welding drum group: material inspection → blanking → groove processing → pre-bending → winding → circle correction → Welding → circle correction → flaw detection → stress relief annealing → machining → inspection
The processing process of the drum group
The process flow of the drum group
The following steel plate welding drum as an example to introduce some steps.
(1) Material inspection: The quality of the materials shall be verified after the raw materials are entered into the market, and they can be used only after being verified as qualified.
(2) blanking and beveling processing: drum body, rib plate, web and drum hub respectively blanking processing. After accurately cutting the material on the CNC cutting machine, the groove is processed on the edge planer, and the groove type is bilateral V type 50° on both sides of the groove within 50 mm range of rust, oil, water and other dirt must be clean.
The processing process of the drum group
(3) Winding: the straight edge of the drum winding is pre-bent on the single-arm correction hydraulic press, so that its bending radius of curvature is consistent with the finished product. And roll several times, and then correct.
(4) Welding: the welding of the drum as far as possible to use submerged arc automatic welding, multi-layer and multi-pass welding, back root, can also use manual welding bottom welding, submerged arc automatic welding cover, bottom welding as far as possible to use manual arc welding, the front first use manual arc welding bottom, and then use submerged arc welding; Air gouged back root and welded with submerged arc welding.
The processing process of the drum group
(5) Fine turning: The use of CNC lathes, according to the characteristics of the rope groove of the drum to prepare a specific processing program for turning. Or according to the characteristics of parallel folding rope groove, the method of installing special sector pulley on the active pulley of ordinary lathe is used to continuously process parallel folding rope groove.
