SUDA CORPORATION

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Maintenance And Remanufacturing
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Maintenance And RemanufacturingMaintenance And Remanufacturing
Through professional technology, technology and equipment, repair or remanufacture of used equipment to make its performance equal to that of new equipment.
Service Content
  • Repair and remanufacturing centers are localized at the client.
  • Analyze the performance, life evaluation, repair identification of waste industrial machinery and equipment.
  • Through professional repair and remanufacturing equipment and self-owned remanufacturing technology, more than 50 key processes of old industrial machinery and equipment are repaired and remanufactured. device.
Service value
Improve asset utilization, extend equipment life cycle, and reduce equipment procurement costs.
Extended life cycle
01
Extended life cycle
01
Extended life cycle
Used equipment is repaired and remanufactured to prolong the service life of the equipment.
Localized maintenance, cost reduction and growth
02
Localized maintenance, cost reduction and growth
02
Localized maintenance, cost reduction and growth
According to the needs of customers in different regions, Sudar quickly coordinated and dispatched maintenance and remanufacturing outlets across the country to arrange maintenance to the nearest maintenance site, which is convenient and fast, thereby ensuring the shortest maintenance cycle. Reduce transportation costs and increase maintenance speed.
Consistent repair quality
03
Consistent repair quality
03
Consistent repair quality
The company has developed more than 50 unified hydraulic support maintenance standards, each of which can be quantified and tested, and will not affect the quality of maintenance due to human factors or customer size and other subjective factors. Test criteria. The repaired equipment is not inferior to the new equipment in terms of size, shape, life, and performance, which extends the life cycle of the equipment and maximizes the customer's initial purchase value of the equipment.
Security System
Guarantee system content
  • Service Process
  • Quality control system
  • Maintenance process
  • Professional setting
  • Professional team

Integrate design, production, and service cycles, excavate all the factors that affect quality, and establish a system to control its fluctuation range, and use defect libraries, quality gates, and ISO9001 systems to achieve precise control and comprehensive improvement.

Quality control chart of stent remanufacturing process


Participated in the preparation of the national standard for the overhaul of hydraulic supports, and formed an independent enterprise maintenance standard system based on national industry standards. At present, there are more than 20 technical standards for enterprises, more than 50 process operation instructions, and 36 procurement and quality control standards.

Stent remanufacturing process flow chart



Hydraulic valve repair

Main process Content Standard Parameter Remark
Sandblasting Valve body 100% sandblasted QJ-SDMJ.05.008-2017 Roughness Ra1.6, particle size 0.2mm Flexible blasting with 100% coverage
Cleaning anti-rust All parts are degreased and derusted GB/T25974.3-2010 10min / batch Degreasing, degreasing, rinsing, rust prevention
Inspection and maintenance Inspection, maintenance and replacement of part size and structure QJ-SDMJ.05.008-2017 Digital detection accuracy 0.01mm Digital inspection records, all seals are renewed
Assembly pressure test Full valve assembly and factory seal test GB/T25974.3-2010 Test pressure 0.2-60MPa Pipeline operation, 100% inspection record

Structural repair

Main process Content Standard Parameter Remark
Appearance pretreatment 100% sandblasting on the surface of structural parts QJ-SDMJ.05.011-2017 Surface Sa2.5
Strengthening layer		 Multi-nozzle full angle, coverage rate above 95%
Weld inspection 100% inspection of main welds QJSDMJ.05.002-2017 Non-destructive testing, not less than the requirements of class II welds Magnetic particle + ultrasonic comprehensive inspection
Welding repair Repair of weld defects and minor base metal damage QJSDMJ.05.010-2017 Isobaric matching, preheating 150-200 ℃ Post-weld insulation + overall elimination
Articulated hole repair 100% repair of deformed hinge holes QJSDMJ.01.003-2017 Roughness 6.3, within 0.5 coaxiality Overall boring repair after high-strength surfacing
Exterior paint Structural paint spraying QJSDMJ.05.003-2017 Film thickness is greater than 100um One primer and two top coats

Column Jack Repair

Main process Content Standard Parameter Remark
Appearance pretreatment 100% sandblasting on the cylinder surface QJ-SDMJ.05.011-2017 Surface Sa2.5
Reinforced layer 0.3-0.5		 Self-rotating shot peening, coverage rate is over 98%
Bore honing 100% honing of cylinder bore QJSDMJ.01.003-2017 Inner hole roughness 0.4
dimensional tolerance H9		 Built-in pressure sensor for precise control
Cold arc fused copper Remanufacture of sliding surface of cylinder inner wall QJSDMJ.01.003-2017 Hardness HB220-260 Metallurgical bonding, self-lubricating materials
External cladding External manufacturing of rod parts QJSDMJ.01.003-2017 Copper accelerated salt spray test 400h Metallurgical bonding, hardness up to HRC50
Cylinder mouth cladding Remanufacturing the sealing surface of the cylinder bore QJSDMJ.01.003-2017 HB240-280, dimensional tolerance H9 3 times better material corrosion resistance
Foot valve cladding Remanufacture of bottom valve hole seal QJSDMJ.01.003-2017 HB230-260, dimensional tolerance H8 3 times higher metallurgical combined corrosion resistance

The company has independently developed over 40 specialized equipment and tooling for remanufacturing of hydraulic supports, and has obtained nearly 30 national patents.


Structural parts automatic pass type shot blasting machine

Automatic guide sleeve cleaning line

Cold arc copper melting machine for cylinder inner wall

Automatic cylinder assembly line

Large oil cylinder vertical folding machine

Oil cylinder equipment pressure test bench

Four-wheel CNC polishing machine

CNC lathe

Radial Drilling Machine

Cylindrical Rotary Automatic Welder


The company has a professional team with more than 10 years of repair and remanufacturing experience.

Service Case
The company will continue to develop and improve service products, continuously improve service systems and capabilities, and create value for customers.
Before the structural parts are repaired
Before the structural parts are repaired
After repair of structural parts
After repair of structural parts
Before pillar repair
Before pillar repair
After the pillar is repaired
After the pillar is repaired
Before hydraulic valve repair
Before hydraulic valve repair
After repair of hydraulic valves
After repair of hydraulic valves
Before stent repair
Before stent repair
After stent repair
After stent repair
Before mouth repair
Before mouth repair
After the mouth is repaired
After the mouth is repaired