機械事業 | 株式会社神戸工業試験場
MACNINING AND MACHINERY

TEST SPECIMEN PREPARATION

 Test specimens used in material testing vary in size and configuration. JIS, ASTM, and other standards require various types of test specimens, designed for each purpose and prepared under restrictions. KMTL manufactures these specimens from a variety of materials, making the best use of technology and expertise accumulated in our long years’ experience. Our skilled operators machine super-large to miniature-size specimens from all materials from steel to ceramics.

SOPHISTICATED MACHINING SKILLS

 Common machining methods include cutting by saw or electric discharge and shape processing by cutting, grinding, and electric discharge machining. A specimen used for testing can affect the test results due to changes in material properties caused by heat affection and plastic deformation during machining and corrosion or chemical changes caused by cutting oil. KMTL has its advantage in its machining methods not affecting the properties of specimens, drawing on more than 60 years of abundant experience.

Water jet cutter
Profile grinding machine

Main Equipment

01 Water jet
cutter
02 Universal lathe
03 Vertical milling machine
04 Grinder
05 NC milling machine
06 Ceramics injection molding machine
07 NC lathe
08 CNC lathe
09 Machining center
10 Saw cutting machine
11 Shaper
12 Electric discharge cutting machine
13 Horizontal milling machine
14 Wire cut electric discharge machine
15 Creep feed
grinding machine
16 Profile grinding machine

SAMPLING AND MACHINING MINIATURE TEST SPECIMENS

 Evaluating strength of boilers and gas turbines and effectively assessing their remaining life in the areas exposed to high-temperature environment requires taking a small amount of the material for testing directly from the area in interest. Depending on each purpose, KMTL extracts very small samples from the surface layer, cracked part and other small areas with the least damage to the object, and machine them into miniature test specimens of various configurations.

EQUIPMENT DEVELOPMENT

 In safety design of structures, their load conditions and fracture behavior must be sufficiently grasped. For this purpose, testing that simulates the actual load conditions, atmosphere and environment is required. KMTL designs and manufactures special testing and other machines based on the precision machining and advanced testing technologies developed over a long period of years.

Special Test Equipment

Main developments – Special material testing equipment

01 High-temperature and high-pressure circulation type
corrosion testing equipment
02 Rotational corrosive-wear
testing equipment
03 Octuple
fretting-wear
testing machine
04 Miniature creep
testing machine
05 Dynamic 4-point bending plastics testing machine
06 High-speed tensile testing machine
with thermostatic oven
07 Automatic Charpy-specimen
mounting equipment
08 Creep testing machine for plastics
09 Rolling fatigue contact testing machine

Main developments – Auto components endurance testing equipment

01 Motoring
testing machine
02 Differential
endurance testing machine
03 V-belt slip fatigue
testing machine
04 Oil-pump endurance
testing machine
05 Dynamic 4-point bending
plastics testing machine
06 Crankshaft fatigue testing machine

Electric discharge sampling equipment

 This equipment has been developed to accurately evaluate the residual life or investigate the failure of large plant-components with a minimized amount of samples taken. (Standard sample size: 2.5 (t) x 20 (w) x 40 (l) mm)
 Various types of testing are available using the extracted samples, featuring destructive testing on our self-developed miniature series testing machines including miniature tensile, high-cycle/low-cycle fatigue, and creep testing machines.

Features

  1. Portable to be used for on-site sampling.
  2. Minimizing effect of sampling by scooping the surface of the object.
  3. Selectable sampling position to suit the object shape.
  4. Preventing machining and thermal deformation.
  5. Reduced sampling cost

Main developments - Radioactivated material testing equipment

01 Fuel rod welding equipment
02 Precracking equipment
for hot cells
03 Remote automation tensile specimen
machining equipment for hot cells
04 Specimen injection molding
machine for hot cells
05 Electric discharge machining
equipment for hot cells

Main developments - Other equipment

01 Boiler header inner surface
inspecting equipment
02 Boiler main stream pipe inner surface
inspecting robot
03 Miniature specimen
longitudinal polishing equipment (Φ1)
04 High-temperature hign-pressure heat treating equipment

Miniature fatigue testing machine

 This equipment has been developed for residual life evaluation of high-temperature components of power plants. It uses a miniature size specimen (2 mm thick) that minimize the effect to the component, enabling to secure the component strength and reliability by minimizing the damage given. Using this equipment will bring about sophisticated maintenance operation and reduce the maintenance cost and period.

Features

  1. Low cycle fatigue testing is available with a gage diameter of 1.5 mm.
  2. Testing is available with a 3-mm thick sheet.
  3. Axial strain contoll between gage marks is available.
  4. Excessive load during specimen setting and heating can be prevented.

Creep testing machine

 Creep testing to JIS, ASTM and other standards are mandatory for aerospace, power generation, auto, and high-temperature and high-pressure components. The creep testing machine we offer is of high accuracy and meets required international standards, satisfying each customer's needs.

Features

  1. Customized design is available, e.g. space saving.
  2. Recovery in case of sudden power outage (Heater automatically resumes after the pre-set time of power outage.)
  3. Customized testing fixtures to fit specimen size variation (optional)
  4. Repair, maintenance, load calibration, and design alteration service

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