Quality Management Process

At Kelleg, we are committed to providing high-quality products and services through ongoing improvement and innovation. Our objective is to elevate quality standards and competitiveness to meet and surpass customer expectations. Over the years, we have established and maintained the ISO 9001 Quality Management System, ISO 14000 Environmental Management System, and ISO 45001 Occupational Health and Safety Management System, ensuring the efficient operation of all management processes. Additionally, we collaborate with SGS, a third-party inspection agency, to drive continuous quality improvements.

Our quality management process encompasses four key stages: supplier management, incoming material inspection, in-process inspection, and final product inspection. This comprehensive quality control process ensures meticulous monitoring at every stage, from raw materials to finished products, providing customers with reliable, high-performance items.

Our quality management process encompasses four key stages

Supplier Management

Supplier Management

Incoming Material Inspection

Incoming Material Inspection

In-process Inspection

In-process Inspection

Final Product Inspection

Final Product Inspection

Example:
Quality Control Process for Top Hammer Rock Drill Bits

Raw Material Inspection

Raw Material Inspection.2

Raw Material Inspection.3

Raw Material Inspection

 

· Inspection Criteria

Dimensions, surface quality, and material composition.

 

· Inspection Equipment

Vernier calipers, Brinell hardness tester, metallographic microscope, spectrometer.

 

· Documentation

Material certification, incoming inspection records, elemental analysis reports.

Material Cutting & Placement

Material Cutting & Placement

Material Cutting & Placement.1

Material Cutting & Placement

 

· Process

Cutting material according to process specifications and attaching process cards.

 

· Equipment

G4230 bandsaw.

 

· Documentation

Process inspection records.

Lathe Machining

Lathe Machining.1

Lathe Machining.2

Lathe Machining

 

· Process

Turning the outer circle of the end face, drilling the thread bottom hole, turning the thread.

 

· Equipment

CNC lathe, contour measuring instrument.

CNC Milling

CNC Milling.1

CNC Milling.3

CNC Milling

 

· Process

Milling chip grooves to ensure positional accuracy.

 

· Equipment

CNC horizontal milling machine.

 

· Documentation

Process inspection records.

Drilling Operations

Drilling Operations

Drilling Operations.1

Drilling Operations

 

· Process

Drilling top and side water holes.

 

· Equipment

Vertical drilling machine.

 

· Documentation

Process inspection records.

Heat Treatment

Heat Treatment.1

Heat Treatment.2

Heat Treatment

 

· Process

Quenching and tempering.

 

· Equipment

Vacuum tempering furnace and vacuum quenching furnace.

 

· Inspection Equipment

Rockwell hardness tester and metallographic microscope.

 

· Documentation

Hardness block inspection records, metallographic analysis, process inspection records.

Machining of Carbide Insert Holes

Machining of Carbide Insert Holes.1

Machining of Carbide Insert Holes.2

Machining of Carbide Insert Holes

 

· Process

Drilling carbide insert holes to ensure a precise fit.

 

· Equipment

Doosan CNC machining center (Korea), pneumatic-electronic measuring instrument.

 

· Documentation

Process inspection records.

Carbide Hole Measurement

Carbide Hole Measurement.1

Carbide Hole Measurement.2

Carbide Hole Measurement

 

· Process

Grouping and grading based on tolerance to ensure fit accuracy.

 

· Equipment

Pneumatic-electronic measuring instrument.

 

· Documentation

Process inspection records.

Centerless Grinding of Carbide Inserts

Centerless Grinding of Carbide Inserts.1

Centerless Grinding of Carbide Inserts

Centerless Grinding of Carbide Inserts

 

· Process

Grinding carbide inserts for a precise fit.

 

· Equipment

Centerless grinding machine.

 

· Documentation

Process inspection records.

Hot Insertion of Carbide Inserts

Hot Insertion of Carbide Inserts

Hot Insertion of Carbide Inserts.1

Hot Insertion of Carbide Inserts

 

· Process

Induction heating of the drill body to enhance quality and efficiency.

 

· Documentation

Process inspection records.

Final Product Inspection

Final Product Inspection.1

Final Product Inspection

Final Product Inspection

 

· Process

Conducting a full inspection according to final quality control requirements.

 

· Documentation

Final product inspection records.

ISO Certificates

lQDPKeMprWiDnHfNAt_NAhuwSP4gIilf_vYHm0YLwBWvAA_539_735
lQDPKHwnazqhvXfNAs_NAg-wN0yXlMaofKcHm0YLwBWvAg_527_719
lQDPJw3fbKz5LHfNAt_NAhuwLH1nv7_YvrAHm0YLwBWvAQ_539_735

KellegYour Trusted Partner
in Drilling Solutions

Through rigorous quality control at every stage, Kelleg guarantees that our drill bits and other rock drilling tools meet the highest industry standards, delivering exceptional performance, reliability, and durability to our customers.

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