New multiple clamping system made by Erwin Halder KG
Quick, versatile and secure clamping of several workpieces with superior precision
Combination clamping bar for long workpieces and complex geometries
One approach to ensure an economical manufacturing process, especially when dealing with small and simple workpieces, is to clamp and machine several workpieces at one time. Erwin Halder KG has now added a new clamping system especially geared towards this purpose. The system represents a highly versatile solution for clamping several workpieces, including those with more complex geometries, not least because of its plethora of accessory combination options.
Offering high clamping forces, straightforward handling, and ultimate flexibility, the modular design of the multiple clamping system engineered by Erwin Halder KG allows the user to clamp single or multiple workpieces with varied dimensions in a quick, secure and precise manner and makes perfect use of the available machine space. As an added benefit, a combination clamping bar can be used to broaden the field of application for Halder's new system even further as it allows for the clamping of several long workpieces or workpieces with complex geometries.
A simple system for precise clamping
"At the core of our system are the clamping bars made of hardened tool steel. The workpieces to undergo machining are placed onto the clamping bars and pressed against fixed stops with the help of a taper clamping unit. Their serrated profile with a pitch of 2.5 mm makes setting up the elements quick and easy and allows for clamping workpieces with superior precision and a clamping force of up to four tonnes", explains Bernd Janner, Sales Manager at Erwin Halder KG. The clamping bars possess a continuous T-slot along which all clamping elements can be moved to any position. The clamping bars are mounted on a plate, a bracket or a cube. Locating screws help align the position of the bars.
Another key component of the multiple clamping system is the taper clamping unit. It is made up of a central taper, two wedge-shaped clamping jaws and a screw. This design makes clamping the workpieces a cinch: Tightening the screw pushes the central taper down and the two clamping jaws outward at the same time, causing the workpiece to be pressed against a fixed stop. To return the clamping jaws to their initial position when released, a spring is hooked into the side of the unit. The extent to which the clamping jaws will be pushed outward varies with the specific taper clamping unit used. The displacement for sizes M8 and M12 is +/- 0.5 mm and +/- 1 mm, respectively. The clamping jaws are produced from hardened, ground and blackened tool steel. Available are ribbed and plain models as well as models with a mounting thread. Depending on the selected model, the taper clamping units are equipped with two different or two identical clamping jaws.
The taper clamping units designed for the multiple clamping system come standard with a T-slot tenon to allow for effortless installation into the clamping bars, where they can be fixed in place at any position. Bernd Janner on that topic: "We offer a matching adapter for all users who wish to couple their existing taper clamping units with our system - even if their units do not include a T-slot tenon."
The right fit for every workpiece
A particular highlight of the new multiple clamping system is the extensive selection of available stops, which are made of hardened tool and suitable for a large variety of workpieces. Enhanced with a diamond coating, the stops generate only low positive locking forces during clamping. The highly advanced coating causes no or next to no damage to the surface of the workpiece. To provide for form-fitting clamping, the system can be combined with stops including gripper studs that are composed of two HSS pins.
Also available are stops with ribbed pins for superior grip, plain stops with a shortened width or as tall versions, stops with a ribbed and a plain side, stops with a mounting thread on either side or stops with one mounting thread and a plain / ribbed side as well as stops with horizontal or vertical prisms that boast an angle of 120°. "These stops cover a wide range of clamping options for all sorts of tool geometries. Customers who still cannot find the right solution among these stops can opt for yet another version from our portfolio. This version makes it possible to adapt the jaws to the required workpiece geometry", adds Bernd Janner.
What is more, the M6 threads fitted on either side of the clamping bars allow for the installation of lateral stops made of tool steel. They have been treated to a diamond coating to ensure optimum workpiece protection. Our product range is rounded out by various supports for the clamping bars. Aside from versions made of tool steel including a T-slot, we also offer a support made of aluminium that comes with a spring-loaded catch. To keep the tool from shifting while being clamped, Erwin Halder KG also offers a matching insertion tool.
A most useful add-on: the combination clamping bar
"Apart from a wide selection of clamping jaws and stops, our system offers another key advantage over other solutions. Conventional multiple clamping systems are not suitable for clamping workpieces with excessive lengths or components with complex geometries. Our combination clamping bar, on the other hand, truly shines in this regard", explains Bernd Janner. It offers three different modes that can be implemented quickly by a simple conversion of the clamping bar. The first mode allows for the floating clamping of the workpieces – which comes in particularly handy when dealing with complex geometries. In this mode, the clamping bar adapts to the position of the workpiece and supports it without warping - similarly to the tried-and-tested floating clamps offered by Erwin Halder KG.
In centric mode, the centre axis of the workpiece remains unchanged on account of the synchronous movement of the two jaws. This feature makes the clamping bar ideally suited for clamping cast parts as it keeps the centre of the workpiece at the exact same position despite the fluctuating casting tolerances. When used in its third mode, the bar works like a machine vice. One jaw remains in its place, while the other moving jaw clamps the workpiece.