https://cdn.mtdcnc.global/cnc/wp-content/uploads/2020/06/02114821/IMG_2881-1-500x260.jpg
    Machining

    On to a good screw with CMZ

    • By CMZ UK Ltd
    • June 1, 2020
    • 3 minute read

    Established in 1953, the Halifax Rack and Screw Company Ltd has become one of Europe’s largest specialist manufacturers and suppliers of gear racks, pinions, trapezoidal power screws, jack screws, ACME feed screws and nuts as well as having a full CNC subcontract machining facility. The Brighouse manufacturer recently invested in a CNC turning centre from Spanish machine tool builder CMZ, so MTD magazine ventured along to find out why…

    With several vendors available to supply robust high-end multi-axis turning centres, MTD magazine was keen to find out why the West Yorkshire Company opted for the CMZ TD Series turning centre. Simon Matthews from Halifax Rack and Screw told MTD: “One of the main reasons for selecting this machine was the travelling automatic steady on a separate slideway. This allows us to make long slender parts. With the automatic steady on a separate slideway, the steady can follow the tool path and support the job all the way down the length of the part. We can machine up to 1300mm long on this machine and we can follow the tool along the part.”

    The clear and apparent benefits of this are improved rigidity and stability, which subsequently enhances the surface finishes, tool life and of course, permits the 30-employee business to take heavier cuts. This combination improves component quality, reduces tooling costs and increases productivity considerably.

    “The real tangible benefit of this is that we can achieve a much better surface finish on threads, particularly deeper threads. We have strategies to machine threads; we don’t just do full form threads, we also do flank threads as well, and this is where the CMZ does achieve better surface finishes,” claims Mr Matthews.

    The company also conducts deep hole drilling and during the MTD magazine visit, Halifax Rack and Screw was drilling a hole with a U-drill on the CMZ TD Series machine that was 38mm diameter and 530mm long. With high-pressure coolant on the machine, the coolant is directed straight through the extra-long drill to cutting-edge – another factor that is improving component quality and productivity by expediting chips through deep bores.

    The CMZ machine has a 16-tool turret that gives the company additional flexibility. As a company, CMZ places a huge emphasis on the power and stability of its machine tools. Commenting on this, Mr Matthews says: “The machine is very powerful and can take some very deep cuts, yet still maintain final tight tolerances. We have put the machine through its paces, cutting some challenging materials such as nickel alloys and all the other alloy steels.”

    This is a credit to a machine base that is constructed from a single block casting with thermal sensors in the bedplate that control the temperature of the oil. This ensures that all spindles, screw nuts, ballscrew mounts and the turret retain a consistent and optimal temperature level. This enhances the precision of the CMZ TD Series whilst bi-directional laser compensation on all axes assert this level of precision. Furthermore, the integrated spindles have a double row of roller bearings to withstand heavy blows without any deterioration.

    Referring to the ease-of-use and access to the work envelope, Mr Matthews says: “From an operator perspective, when the doors open we have full access to the machine and the guys that run it, really like the machine. We are extremely pleased with the new acquisition,” concludes Mr Matthews.

    https://cdn.mtdcnc.global/cnc/wp-content/uploads/2020/06/02114821/IMG_2881-1-500x260.jpg

    On to a good screw with CMZ

    Established in 1953, the Halifax Rack and Screw Company Ltd has become one of Europe’s largest specialist manufacturers and suppliers of gear racks, pinions, trapezoidal power screws, jack screws, ACME feed screws and nuts as well as having a full CNC subcontract machining facility. The Brighouse manufacturer recently invested in a CNC turning centre from Spanish machine tool builder CMZ, so MTD magazine ventured along to find out why…

    With several vendors available to supply robust high-end multi-axis turning centres, MTD magazine was keen to find out why the West Yorkshire Company opted for the CMZ TD Series turning centre. Simon Matthews from Halifax Rack and Screw told MTD: “One of the main reasons for selecting this machine was the travelling automatic steady on a separate slideway. This allows us to make long slender parts. With the automatic steady on a separate slideway, the steady can follow the tool path and support the job all the way down the length of the part. We can machine up to 1300mm long on this machine and we can follow the tool along the part.”

    The clear and apparent benefits of this are improved rigidity and stability, which subsequently enhances the surface finishes, tool life and of course, permits the 30-employee business to take heavier cuts. This combination improves component quality, reduces tooling costs and increases productivity considerably.

    “The real tangible benefit of this is that we can achieve a much better surface finish on threads, particularly deeper threads. We have strategies to machine threads; we don’t just do full form threads, we also do flank threads as well, and this is where the CMZ does achieve better surface finishes,” claims Mr Matthews.

    The company also conducts deep hole drilling and during the MTD magazine visit, Halifax Rack and Screw was drilling a hole with a U-drill on the CMZ TD Series machine that was 38mm diameter and 530mm long. With high-pressure coolant on the machine, the coolant is directed straight through the extra-long drill to cutting-edge – another factor that is improving component quality and productivity by expediting chips through deep bores.

    The CMZ machine has a 16-tool turret that gives the company additional flexibility. As a company, CMZ places a huge emphasis on the power and stability of its machine tools. Commenting on this, Mr Matthews says: “The machine is very powerful and can take some very deep cuts, yet still maintain final tight tolerances. We have put the machine through its paces, cutting some challenging materials such as nickel alloys and all the other alloy steels.”

    This is a credit to a machine base that is constructed from a single block casting with thermal sensors in the bedplate that control the temperature of the oil. This ensures that all spindles, screw nuts, ballscrew mounts and the turret retain a consistent and optimal temperature level. This enhances the precision of the CMZ TD Series whilst bi-directional laser compensation on all axes assert this level of precision. Furthermore, the integrated spindles have a double row of roller bearings to withstand heavy blows without any deterioration.

    Referring to the ease-of-use and access to the work envelope, Mr Matthews says: “From an operator perspective, when the doors open we have full access to the machine and the guys that run it, really like the machine. We are extremely pleased with the new acquisition,” concludes Mr Matthews.