FEATURE ON CNC LATHES AND TURNING CENTRES

Citizen helps subcontractor raise efficiency

Subcontract machining firm Apel, which specialises in the manufacture of precision components for the aerospace industry, began investing in Citizen CNC turning centres in the 1980s to help raise efficiency. Over time, the company has continued re-investing in modern, productive lathes purchased exclusively from Citizen Machinery UK.


At its Wilmslow facility, Apel today operates nine Cincom sliding-head lathes and one Miyano fixed head model. Together they produce around 50,000 components per month across more than 3000 part numbers. Utilisation of these Citizen CNC lathes and related technologies has led to higher levels of productivity and profitability.

The technology providing the biggest contribution to raising production efficiency at Apel is Citizen’s proprietary LFV (low-frequency vibration) chip-breaking software, which is part of the operating system in the control of three of the six 20 mm capacity Cincom L20s on site. Upon activation, the function breaks what would otherwise be long, stringy swarf into short, manageable chips. Around 50% of material processed by Apel is aerospace-grade stainless steel bar and LFV is especially effective when processing this alloy.

Paul Bowker, Apel’s quality director, says: “We were an early adopter of LFV in 2018 following a visit to Citizen Machinery’s technical centre in Bushey to witness demonstrations. LFV reduces the metal removal rate slightly, so we don’t use it all the time, but it’s really useful to be able to pick and choose when we activate this function.”

Apel also uses Citizen Machinery’s adaptive guide bush (AGB) system, which automatically compensates for variation in bar diameter, preventing stock seizing in the bush. In addition, AGB constantly maintains concentricity to prevent run-out. The user is able to avoid downtime and maintain tight machining tolerances.

More information www.citizenmachinery.co.uk

Colchester inspires next-generation engineers

Colchester Machine Tool Solutions supports training facilities, universities and colleges
across the UK and Europe with its manual and CNC machine tools. In today’s rapidly evolving
technological landscape, integrating machine tools into educational curricula is essential.
Machine tools serve as a gateway to hands-on learning, fostering a deeper understanding of
engineering principles and preparing students for the challenges of the modern workplace.
Recently, Colchester Machine Tool Solutions had the pleasure of hosting a group of student
engineers from Leeds City College at its European Technology Centre in West Yorkshire.
During their visit, the students engaged in an in-depth learning session on machine tool
maintenance, specifically on a Harrison M300 lathe. They gained hands-on experience with

changing headstock oil, replacing and tensioning spindle drive belts, maintaining coolant
pump shaft seals, and maintaining main bearing lubrication systems. This comprehensive
session provided invaluable practical knowledge that will serve them well in their future
careers.
Colchester Machine Tool Solutions has a long-standing commitment to educational
excellent. The company says its machine tools bridge the gap between theory and practice,
giving students a real understanding of engineering concepts. Students also develop critical
thinking and problem-solving skills as they tackle genuine manufacturing challenges using
the latest machine tools.
All of the company’s CNC machine tools feature industry-standard FANUC or Siemens CNC
systems, complete with integrated conversational programming capability, also available in
offline format. In addition, the dedicated support team at Colchester Machine Tool
Solutions offers full telephone support from its applications training engineers and
specialised training programmes for tutors.
More information www.colchester.co.uk

Driven-tool CNC turning centre launched

Hurco introduced a new range of four driven-tool CNC turning centres at the MACH 2022 exhibition, during which the 8-inch chuck version was exhibited. At the 2024 show last month it was the turn of the 10-inch chuck variant to appear: the TMX10MYSi. All models include a programmable Waxis to position the tailstock or sub-spindle.

The turning centres offer higher specification and performance than the established TMi and TMMi models. Among the major differences are higher power and speed plus a larger, heavier machine frame and the addition of a Yaxis to allow more versatile machining.

Notably, the servo-driven turret carries 12 VDI 40 radial tools rather than axial tools (as on the/TM Mi range). Each station offers a maximum rotational speed of 5000 rpm and a peak output of 6.3 kW at 2190 rpm. Hurco’s control software allows users to take advantage of the manufacturer’s proprietary conversational routines for milling operations, making the package attractive for small-volume production requirements.

Two smaller capacity Hurco CNC lathes with 8-inch chuck capacity were also on show, the TM8i and the TM8Mi with axial driven tools. These latest models have a larger spindle bore than their predecessors, as well as roller guideways and a more compact footprint. As a further point of note, the improved control features concurrent programming, estimated runtime, error check and recovery restart, and enhanced performance during rigid tapping.

For further information www.hurco.co.uk

High-specification lathe at competitive price

At the MACH exhibition in Birmingham, UK, last month, NCMT showcased a number of Okuma turning centres, including the competitively priced Genos L3000-e-MYW. The display saw the machine fed automatically with shaft-type parts by a Cellro CoMate collaborative robot (cobot). The maximum turning diameter of the Genos L3000-e-MYWis 300 mm while speed of the 22 kW spindle is up to 3800 rpm, all in a compact footprint of 2.5 x 1.9 m.

This 6-tonne turning centre featuring sub-spindle and a 12-station turret with Yaxis and live tooling offers robust construction. An integral spindle motor and rigid guideways make it suitable for the precision machining of many materials, including exotic alloys. User-friendly features include a separate coolant tank for quick servicing, and easy spindle access to speed maintenance and machine set-up, and reduced chip accumulation for less machine downtime during removal.

Okuma’s One-Touch IGF is an option in the OSP control. The One-Touch IGF allows users to describe part geometry including diameter, length, grooves and threads using simple commands, from which the system draws the defined shape and then develops the part program automatically.

Also on the stand was an Okuma MultusU3000 multi-tasking lathe with a 240° swivelling B-axis head and HSK-A63 (optionally Capto C6) 12,000 rpm/22 kW spindle for turning or milling components up to 1500 mm between centres. The tool magazine has 40 stations as standard, but is optionally available with a capacity of 80 tools.

Okuma’s MultusU3000 features Okuma’s own linear scales for high-accuracy positional feedback. Servo motors deliver feed rates of up to 50 m/min in the X and Z axes, and up to 40 m/min in the 250 mm Yaxis. Together with the Caxis on the main spindle, the machine is capable of fully interpolative five-axis (X,Y,Z,B,C) machining of freeform surfaces.
For further information www.ncmt.co.uk

Showtime for Hanwha sliding-head lathes

To showcase the breadth of its machine tool offering, Dugard gave the Hanwha brand of sliding-head turning centres prominence on its stand at the MACH exhibition in Birmingham, UK, last month.The XD10, XD20 III and XDI 32 modelstook centre stage.

The smallest of the three, the Hanwha XD10,offers 10mm bar capacity for the mid-to-highvolume machining of small components. With a 15,000rpm/3.7kW spindle and eight front and six back-end turning tools, the XD10 is a flexible proposition. The machine also provides four ER11 front-end tools and four ER11M cross-drilling tools with eight ER11 sub-spindle back-working tools.

Next to the Hanwha XD10 was the larger Hanwha XD20 III. Available with FANUC or Siemens control, the XD20 III is for machining both short and long components with its extended Z1-axis stroke of 240mm and Z2-axis stroke of 286mm. With five cross-drilling stations as standard and a Y2 back-tool feature, the XD20 III demonstrates high productivity levels. Flexibility comes from the presence of six OD tooling stations, five ER16M positions for front and back working, five ER16 cross-drilling positions (with an additional two for off-centre drilling),and eight back-end tools configured as four fixed and four driven positions.

The third Hanwha machine on the stand was the XDI 32. The largest of the three Hanwha machines at MACH, the XDI 32 provides strong performance characteristics that stem from a robust machine construction, providing the base for precision, repeatability and smooth surface finish. The 32 mm diameter capacity machine features a 6500rpm sub-spindle and up to 26 tools.

For further information www.dugard.com