FEATURE ON WORKHOLDING

Jaws offer centrifugal force and vibration compensation

Schunk says that its new hydraulic compensation jaws set a new benchmark for low-deformation workpiece clamping. According to the company, it is the first time that chuck jaws for compensating the workpiece clamping process have successfully been combined with centrifugal force compensation, vibration-damping characteristics and micron-precision concentricity.

The integrated oil chamber innovation and clamping technology is a central feature of the new hydraulic compensation jaws. Above this are two oscillating clamping elements for clamping rough or finished component workpieces. As the jaws individually adapt to the workpiece, form tolerances in castings, for example, are reliably compensated. Compared with conventional three-point clamping, the number of clamping points is doubled, which lowers workpiece deformation. Obtainable roundness is also increased.
At high speeds, the hydraulic clamping system automatically guarantees centrifugal force compensation, which ensures that the clamping force is always reliably maintained. In order to minimise workpiece deformation, the clamping force can be considerably reduced in comparison with previous solutions without restrictions on process reliability.
For maximum precision on the component, the concentricity can also be adjusted with micron-precision on the chuck jaws. Additionally, the vibration-damping characteristics of the oil chamber system benefit the surface quality of the workpiece, while tool life is increased.
For further information www.schunk.com

Workholding system improves productivity

When Chick Workholding launched its One-Lok clamping system seven years ago as an alternative to the conventional machine vice, the company made available more precise workpiece positioning and a time-saving ratchet mechanism to adjust the position of the moveable jaw quickly. New lightweight versions have now been unveiled, offering users additional benefits. Availability in the UK is through sole agent 1st Machine Tool Accessories.

The latest One-Lok comes in two sizes rather than one, 400 or 500 mm long, offering maximum gripping lengths of 180 and 280 mm respectively. Further improvements include a lowering of the clamp profile from 150 to 134 mm, which allows longer spindle travel in the Z axis and halves the unit’s weight for easier handling. With this in mind, an ergonomic hand grip has also been added at either end.
Sometimes, machinists turn a vice through 90° so that it lies transversely across the machine table. This strategy can bring the part closer to the operator, but has the disadvantage that there is no clearance for the handle. With the new One-Lok, workholding in this orientation has been made easier by using a ratchet handle.
The moveable jaw on One-Lok systems can be adjusted quickly and conveniently, as it can now be slid using one hand rather than two over the QwikSlide ratchets. A few turns of the handle move the jaw in the same direction over the last few millimetres to complete the clamping action. The existing BoltFast interface for the 152mm wide, interchangeable hard and stepped steel jaws and aluminium soft jaws, has been retained. A quarter turn of the locking screw is all that is required to exchange them, promoting productivity when machining small batches of components.
For further information www.1mta.com

Manipulate workpieces of up to 2000 kg

The new Centrick manipulator from Roemheld enables the tilting and turning of heavy workpieces up to 2000 kg in weight. Integral articulated arms can continuously rotate workpieces and tilt them up to 90°.

This latest addition to the Modulog range of assembly and handling technology can tilt and turn products of any shape. According to Roemheld, the manipulator is ergonomic, space saving and efficient. Unlike conventional tilting and turning fixtures, the Centrick moves a component close to its centre of gravity, so the working height remains more constant. A small swivel radius ensures high stability and, if the manipulator is moved, holding brakes maintain a stable assembly position.
The Centrick from Roemheld is quiet to operate, with very low power consumption. Moreover, the manipulator can be easily integrated into assembly lines and is compatible with Industry 4.0 assembly processes. The company says that times can be reduced for assembly and materials handling, while safety is increased and downtime cut.
For further information www.roemheld.com

ETG gets a grip on clamping

ETG Workholding has been appointed the exclusive UK supplier for the German Spreitzer range of precision tools, nike air max specialising in the development and manufacture of standard and bespoke solutions in the field of clamping and measuring. Nike Air Max 2016 Dames wit A product range that ETG Workholding will be particularly promoting is the MZR range of mechanical centre vices, which offer the ability to securely clamp raw material workpieces without the need for pre-stamping. Asics Gel Lyte 3 “There are many options for raw material clamping but the vice is only part of the solution,” states ETG Workholding’s product manager Rob Beckett. Oregon Ducks “Raw materials mostly need pre-stamping, St. Johns Jerseys which adds further cost over and above the purchase cost of the vice, air max 1 pas cher and adds time to what is essentially a very straightforward operation. “MZR vices are ideal for working on multi-axis machining centres,” he adds “as they are compact in design with a small trunnion footprint yet still offer maximum access and the ability to enlarge the clamping width with reversible jaws.” Raw part machining uses the grip jaw option with the second set up for finish machining using the smooth jaw option – all without pre-stamping. Air Jordan 6 For Kids Depending on the jaw clamping width selected (four options between 70 and 195 mm), Jordan Hydro Retro a maximum clamping force of 40,000 N is achievable. This grip contributes further to reduced cycle times, enabling raw workpiece materials to be rapidly positioned, nike air huarache hombre clamped and positioned ready for machining. “Our agreement with Spreitzer is exciting as it brings a whole new range of high-quality, German manufactured equipment to the UK at very competitive prices,” concludes Beckett.

10-second changeovers with combi-collet chucks

When Parker Precision set itself on a course to improve productivity, precision and output, the Bilston-based business acquired a Mazak QuickTurn 200MSY turning centre equipped with a Hainbuch collet chuck. New Balance 574 mujer The impact of the new investment soon snowballed into a raft of new machine purchases. Canotte Los Angeles Clippers Installed in 2012, the Mazak was purchased for its sub-spindle turning capability with the aim of reducing second operations, part handling and the potential for error, as well as improving throughput. ADIDAS VALCLEAN2 CMF The impact of the QuickTurn rapidly noted the arrival of a second 200MSY, a 250MSY and a Hyper Quadrex – all fitted with collet chucks from workholding specialist Hainbuch. Arizona State Sun Devils Jerseys Commenting upon the delivery of HainbuchSpanntop Combi collet chucks with the Mazak machine tools, director at the 28-employee subcontract company, Marc Corns, says: “When we set about replacing machine tools with new technology, our concern was transferring complex parts from the main to the sub-spindle and maintaining our average ±0.01 mm tolerances on dimension and concentricity precision. Air Jordan 7 Uomo To this end, Mazak recommended a Hainbuch 65 mm diameter Spanntop Combi collet chuck for the sub-spindle. Andrew Luck – Stanford Cardinal This worked so well on the first machine, we specified the Hainbuch collet chucks on the sub-spindle of every subsequent machine installation. nike air max goedkoop “One thing we can quantify with the Hainbuch system is the savings in regards to collet changeovers,” he adds. adidas shoes uk “Our previous 5C collet system on the old machines used to take up to 30 to 45 minutes to change over.