This hardness test bench for crankshafts is a especially for this case constructed machine using a Rockwell- testing head. Clamping and unclamping as well as the positioning of the test piece are manually operated. The positioning as well as the clamping of the test gripper (with hardness test head) happens motorised due to operating the corresponding controls and sensors.
All controls for setting up the machine and for the electronic positioning and test gripper clamping are placed in an operator panel in front of the machine. Through a serial interface at the hardness test head, measured values can easily be sent to a data capture device (printer, pc).
The crankshaft will be transported to the hardness test bench using a suitable hoist (hoist and separate lifting accessories are not included in delivery) and will be placed and clamped between spikes.
To realise this, the clamp table has to be driven to its open cut load position.
The crankshaft can be rotated to its axis and manual freely positioned m below the test head. If the machine has reached its testing position, the user is operating the electromechanic / -pneumatic bracing and centering.
The hardness test head is electromotive movable in Z-axis.
The hardness measurement can be made by manual or electromotive testing.
For security reasons, all electromechanic / -pneumatic movements are only in two-hand operating available!

This hardness tester for evaluation of Jominy-tests is an automated system composed of the following described components:

Rockwell-hardness tester model AT 200 DR-TM with motorised applying force

• hardness tester according to the "clamping principle", yielding or deforming of test pieces is not affecting the test results.
• operating the system over the display at the controlpanel
• ready for acceptance through MPA or LGA
• possibillity, to logging the received results and to extend with it the documentation with usage of an printer or computer (parallele und serial RS232-connection is available).
• five languages are available for printing of test reports and the operator guidance.
  

With this hardness tester- a further development of the hardness testers of series AT 130 - you can do serial measurements semi- and fully automated because of the motorisation. The device is general elaborated for Rockwell, it is also possible to appraise Brinell-values with Brinell-penetrators and Brinell-load levels over HB-measurement.

Software Precidur Level 2 DE

• definition and storing of testing programs (templates)
• fully automated control of the test cycle
• evaluation according to DIN EN ISO 642 (01-00)
• graphical displaying of the hardness test process
• logging output
  
• storing and export of measurment datas (specification is necessary)
  
• user guide in German language

X-Y cross table

• step motor driven X-Y crosstable distance ca. 300x200 mm
• Stepper-Box (control unit)

mounting device

mounting device for exactly positioning clamping of up to 6 Jominy - test pieces, fixed at the X-Y crosstable

Hardness tester with max. 3 programmable scales

• by default Brinell HBW2,5, and also Rockwell available
• max. clamping force on test sample 3,5kN
• traverse stroke 400mm
• test bench range 290mm
• hardness test head
• AT130DR test head Rockwell

The hardness tester for rims is an electromechanic special hardness tester, that is specialised for rim testing. The test frame divides in samples table, guidance device with load device followed from the test head.
The actuation of the guidance device results from a AC- servomotor over an elevating screw . With this actuation the test force (minor load) will be applied to the test piece.
The applying of total test force happens through a pneumatic bellows cylinder. For manual positioning of test pieces on the samples table, two laserpointer are fitted on the device penetrator.

The Rockwell-Hardness test system is able to realise conforming to standards hardness test according to the Rockwell method on crankshafts. Clamping and unclamping and also the positioning of test pieces will be managed manual. The positioning as well as the clamping of the test gripper (test head) happens motor-operated through operating the corresponding controls and sensors.

All controls for setting up the machine for tests and for electromotive positioning and clamping of the test gripper are placed on the control panel in front of the device.
With the integrated connection on the hardness test head, measurement datas can be sent to your printer or computer.

The hardness testing equipment consists of a ball roll table and a motorized height adjustable Rockwell hardness tester (Ernst AT-130).

Bulky or heavy workpieces can be put down by means of lifting apparatus on the ball roll table and be pushed manually into the necessary test position.

The height of the construction units does not play a role by the motor adjustableness of the probe.

The Rockwell hardness testing equipment for crankshafts is a device designed particularly for this application purpose using a Rockwell measuring head of the company ERNST.

The following specifications are fulfilled by the hardness testing equipment:

• Standard hardness testings in the Rockwell procedure perpendicularly at all taps of crankshafts with reciprocal centering borehole to overall length 800mm and maximum flight circle diameter 250mm.
  
  
• By use of a particularly made penetrator with 5mm width and an accordingly narrow support the distance can be tested from 3mm of the crank . The penetrator and the support are extended and reach a depth of approx. 80mm.
  
  
• Expenditure of the measured values over RS232 interface (standard production log is available).
  
  
• The hardness tester can be used in accordance with its specification further for standard applications
  
  
• The plant is supplied with manufacturer's test certificate. * The plant inclusive penetrator is MPA compatible.
  
  
• The plant is supplied with an underbody (e.g. work bench approx.. 2000 x 900 mm) . A PC (approx. 500 x 300 mm) can be fastened beside the hardness tester on the underbody.
  
  

Test sequence/technical description:

The crankshaft is brought with a crane to the hardness testing equipment and clamped firm between points on the XY cross table. For this the cross table is driven into the preparation position (approx. 500 mm in operator direction, freely accessible from above). The cross table is manually in x and y-direction adjustable and the test specimen can be turned around its longitudinal axis. The cross table is stored in a high-quality ball rotating rail guidance. In x-direction a rest rail is intended, which makes faster positioning possible. The rail is replaceable for different test specimens. If a test position is reached in XY direction, the prism tables support is driven with a Joystick by electric motors from down against the test specimen, with which this is centered and - on use of the anti-twist plate - is strutted. The hardness measuring head is by electric motors in z-direction displaceable. By Joystick it is moved downward, where it stops with reaching the test before strength. The loading and relieving with test load takes place manually at a lever. For the security of the operator the movement by electric motors is possible only in two-hand control.

To the order of a manufacturer of coin blanks we developed this system for fully automated one-indentation hardness measurement.

We successfully designed a sophisticated handling system for blank feeding and accepted/rejected sorting as well as a control and evaluation software.