Hoist & Crane Factory

Overhead Crane Engineer's Factory, Guaranteed Overhead Travelling Cranes

Advanced crane factory for 80 varietiesof overhead travelling cranes designs and fabrication for your selection, CE crane manufacer and supplier, top 3 factory in China.

The crane factory of Dongqi Crane is located at the crane Industrial park in Xinxiang, Henan province, China, the well-known origin of Chinese lifting crane equipment. It takes a covering area of over 680,000m2, equipped with around 2000 sets of advanced processing and testing equipment, nurturing and nurtured more than2700 employees, among which there are 400 managerial and technical personnel and 80 senior engineers, etc.

As the core of Dongqi Crane , the crane development and tech innovation arealways ranked at the first place. So far, we have obtained more than 300 patents of cranes, expanded crane types to more than 80 varieties in seven series, standardized more than 20 high-class processes in the crane production, etc. With increased research and development, we have developed our featured container bridge cranes, large-tonnagelarge-span cranes and high-intelligent remote monitoring cranes, etc.

With investment of 120 million RMB, Dongqi Cranes has built an intelligent finishing workshop, with a complete digital management system, Siemens CNC system,high-precision detection system, robot automatic feeding and other cutting-edge equipment. With introduced advanced equipment like soldering robot we have developed an internationally advanced digital crane factory with intelligent production lines, etc.

Generally, the material handling cranes are mainly consisted of the following main parts & components :

• Crane steel structure, assembled with main girders, end carriages, platform, ladder, railings, and trolley frame, etc
• Machining parts& purchased crane parts and components including , bearings, fasteners, standard parts, etc
• Cooperation crane parts such as, crane lifting hooks and electrical spare parts, etc.

Fabrication of crane steel structure

• Incoming material inspection: To ensure the incoming materials such as steel plates and welding parts are qualified in quality, chemical composition, mechanical strength, etc.
• Pre - treatment of steel surface: To remove the rust by shot blasting and ball blasting to ensure steel plates are in compliance with the national standards.
• Primer Painting:To avoid re-rusting after shot blasting and ball blasting
• Marking off:To mark the steel plate with processing shape and lines trough sample plate,diagram or handrail, etc.
• Plate-cutting: To cut steel plates into the required dimensions by CNC cutting, semi-automatic cutting, shearing and sawing.
• Plate welding: To weld the shaped plates together according to requirements by semi-automatic cutter and automatic submerged-arc welding.
• Flaw detection: To detect the flaw of butt weld seams by ray and ultrasonic to ensure quality
• Leveling:Level the steel plate after connecting.
• Secondary mark ing& cutting: To mark and cut the steel plate with the required shape and size by the semi-automatic cutting machine after connecting, detecting, and leveling.
• Assemble:To assemble the main crane steel structure by welding the plates and profiles together
• Flaw detection:To detect the weld seams of main parts to ensure quality of welding
• Assembly (assemblage):To assemble each part as required.

Production of Machining Parts

• Rough parts:mainly including cast steel iron casting,, welding parts, round steel parts ,etc..
• Machining:to make the rough pats into qualified one by changing the shape, size, or surface roughness through milling, planning, grinding, boring, drilling, insertion, etc.
• Electric Assembly:Assembled by electrician.
• Bought out items:including motor, reducer, bearing, standard fastener, electrics and other standard parts purchased as the required configuration table prepared by crane designing department and the schedule made by crane processing department, and which will be assembled according the crane drawing.
• Cooperation parts: referring cast steel, iron casting, forging and overall spare parts which are designed by our crane engineer but fabricated by cooperated crane spare parts manufacturers, which will be inspected when arriving in our crane factory.
• General assembly of Crane: To assemble cranes part and components as the request of general crane drawing. After trial crane erection, some of the crane parts will be removed for the convenience of transportation, which will be assembled again at crane installation site.
• General Inspection of Crane: To inspect the crane thorough in compliance with relative standard and technical requirements, and ex-work certificate will be issued to the qualified one.
• Painting: To coat the overhead travelling cranes with paints selected based on crane application environment.
• Paint Inspection:To check crane paint in terms of film thickness, sag and crinkle, etc.
• Crane Delivery: To delivery the overhead travelling crane to user as request
• Site erection
• Acceptance

Quality guaranteed overhead travelling cranes to meet diverse requirements. With the top-level quality assurance system,comprehensive strict management system,strong production capacity and advanced inspection technology, we can not only ensure high quality products and outputs but also can provide versatile of overhead travelling crane solutions with various of crane designs and crane configurations to meet different lifting requirements and industrial applications.

Our production teamare consisted of experienced craftsmen and skilled workers who work on welding, machining, electrical, steel fabrication, painting and shipping . Particularly, the fabrication employees from welders to electricians are certified and professional.The honest, experienced and skillful working staff are our greatest treasure who are the foundation of crane manufacturing and ensure the crane quality and output.Dongqi Cranes,together with our honest and lovely employees, are ready to provide high standard overhead travelling cranes to improve your working efficiency, safety and productivity.

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