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UP-TO-DATE WITH THE INDUSTRY 4.0

PRODUCTION PROCESSES AND CAPACITIES

We are versed in interphase control, where each operator involved in the machining process carries out self-control to ensure products comply with the specifications listed in the work order; we keep track of daily and weekly progress of order completion, record production times, and monitor product quality.  With our cutting-edge automated and robotised technology we are in a position to deliver high quality products in time and in accordance with the customer’s specifications, every time. Work processes are carried out by our highly qualified staff distinguished by a technical culture that brings together the agile young and the more experienced older members, some of whom have been with the company for more than 20 years.


  • FORGING

    FORGING

    The heads for M6-M72 bolts are forged by induction heating. The heating parameters are determined with a pyrometer and the forging process is carried out in two stages to improve the mechanical properties and structure of the materials (dynamic impact strength). The automated forging process reduces the likelihood of errors. Our in-house tool shop allows us to achieve shorter tooling times between series. The forging process is quickly validated.
  • HEAT TREATMENT

    HEAT TREATMENT

    All our heat treatment processes are verified and computer controlled: tempering, normalisation, blackening, soft annealing, full annealing and selective hardening. This procedure ensures high levels of reproducibility and allows us to build a database, which is essential for further analyses and development. Heat treatment recipes are the result of ongoing training and know-how, accumulated over a span of 50 years.
  • TURNING

    TURNING

    Conventional turning of workpieces from 5 to 100 mm in diameter, on CNC lathes, and special turning of longer workpieces, from 8 to 70 mm in diameter, with a maximum length of 1000 mm. Thanks to our modern machine park, automation AND a high level of preventive maintenance, we are able to provide tight dimensional tolerances.
  • THREAD ROLLING

    THREAD ROLLING

    After the thermal treatment, the workpieces are threaded by rolling, up to the quality grade of 12.9. We provide metric threads, UN, UNC, UNF and BSW threads or threads according to customer specifications. The rolling process is CNC controlled. The thread rolling machines are fitted with a measurement system for measuring the force required for the transformation of material, hardness and the diameter of the shank, onto which the threads are rolled. In the event of deviations, the machine automatically rejects the material.
  • GRINDING

    GRINDING

    Proven grinding processes to ensure specified geometrical characteristics of the products. The most stringent tolerance ranges and precise product dimensions are achieved with the centreless grinding process: for machining large series workpieces with short lead times. In the process of centreless grinding material is removed from the workpiece by means of abrasive cutting.

WE COOPERATE WITH RESEARCH ORGANIZATIONS

The Blaj engineering and production staff vigorously develop new forging technologies for the production of bolts used in high-temperature environments. We cooperate with research organisations in implementing new technologies, since the heating and hot forming processes are more demanding due to different material properties and treatment characteristics.


DEVELOPMENT: There is a solution for any challenge.

Blaj has been partaking in humanity’s engineering efforts for more than five decades Development and quality control allow us to create a competitive advantage for our products. Our in-house tool shop, where our forging tools are made, and technological procedures resulting from our own development activities enable us to promptly manufacture products tailored to customers’ specifications.