This news article was originally written in Spanish. It has been automatically translated for your convenience. Reasonable efforts have been made to provide an accurate translation, however, no automated translation is perfect nor is it intended to replace a human translator. The original article in Spanish can be viewed at El proceso Quickpoint de Junker: economía con puntería

Complete machining of rotationally symmetrical parts with the universal process Quickpoint high speed external cylindrical grinding

The Junker Quickpoint process: economy with aim

Source: Erwin Junker Maschinenfabrik GmbH, Nordrach11/06/2009

June 11, 2009

The modern production requires more and more versatility. This objective is achieved only minimizing times in passing. For grinding Rotationally symmetrical parts that are obtained with the Quickpoint process developed by Junker, company marketed by machinery Eurotec.

Can integrate the rectification Junker modules modified with various bodies, machines Quickpoint be equipped for a grinding, as rectified profile, punzador, notching and thread of tightening a single subject of the piece.

This process Quickpoint, which was developed more than 20 years ago, opens a new dimension to the profitability, exceeding in productivity and versatility to any other process of grinding, in particular for automotive parts. That is why qualified technicians in Nordrach, with their long years of experience and broad 'know-how', continued the Quickpoint process.

Machining with Quickpoint is a high speed external cylindrical machining, and contact between grinding wheel and in the area of the finished piece is about the size of a point.

Reduced grinding forces

The point contact of grinding has special advantages. QUICKPOINT uses a body of CBN or diamond of extremely low wear and a width of only few millimeters while the inclination of the axis of the body with respect to the horizontal axis of the piece creates a free angle, thus reducing the contact line to a point. In this way, minimizing the forces favoring the grinding of thin and sensitive parts.

QUICKPOINT allows complete grinding of edges and extreme levels on both sides, cones, chamfers, radii, fest, carved, you thread, levels and multiple edges, also at both ends of the piece, without change of body and a single subject. In addition, no annoying tows are required. They are especially high speeds of Court up to 140 meters per second are achieved with the Quickpoint bodies. These speeds can also rectify materials such as ceramic or titanium.Also, a long life without revived of the bodies of cbn means reduced maintenance times. Thus, the productive use of machines Quickpoint reaches up to 95%.

Given these many advantages, Junker has done for the Quickpoint process three series of machines in modular design with a total of five versions of portamuela spindle head. Depending on the complexity of the grinding that the client needs, different versions of head spindle portamuela for various grinding operations, can be assembled to make the concept of grinding optimally adapted to the conditions and criteria of the user.

The smaller models reach a broad spectrum of individual production and mass pieces

Machines Quickpoint 1000 series, with a height of tip of 100 mm and a length of subject and grinding of 150, are ideal for complete grinding of small Rotationally symmetrical parts up to 5 kilos. The Quickpoint 1000/10 version, with a spindle fixed portamuela and a body, is designed for external cylindrical grinding. The Quickpoint 1000/20 version with its screw pivotable portamuela in 15th to rectify edges and cones as well as rights and left flat ends under certain conditions. The third version with two bodies displaced each other allows also the grinding without limitations of rights and left flat ends.

Machines to external cylindrical grinding can be extended for complete machining, integrating Junker grinding modules modified with several teeth.

Five variants of head spindle portamuela for universal and versatile jobs in large series and small batches

The Quickpoint 3000 series offers a very universal use, with a height of tip of 150 mm and a length of subject and grinding of 500 for parts up to 10 kg. In addition to the aforementioned versions of the Quickpoint 1000 series are the Quickpoint 3000/40 and the Quickpoint 3000/60. The first has a spindle portamuela that can swing in 180 ° and 15 ° at the level of work. Thus, these machines can rectify pieces in its full length until its ends as well as rights and left flat edges without limitation.

The Quickpoint 3000/60 version has three portamuela spindles displaced between 120 ° and pivotables. Allows you to correct an external cylindrical body, one of punching/fitted or screwed a piece all geometries in rapid sequence in a single subject. This grinding allows the factories of the automotive industry minimize their times and increase the quality of the products.

Great versatility in large families of parts

The Quickpoint 5000 series offers the advantages of this process to pieces up to 70 kilograms, a length up to 1200 mm and a diameter up to 170. The machines can react quickly in the elaboration of parts in large families and small and medium batch sizes. Head of screw portamuela 10 versions, are available for the great Quickpoint 5000 series 20, 40 and 50.

Equality structures minimises the work and costs. The similar structures of machines in all three series mean advantages for the user. For example, the information you enter through the Erwin Junker Operator Panel EJ-OP. platform Its advantages lie in graphical representation, interactive developments in programming and operation, the reduced need for training and a re-equipment and quick adjustment. Once trained, employees are able to operate all machines Quickpoint for all three series.

Other equal to three series features provide high accuracy and low times of equipment. It is worth mentioning here the patented tripuntal system of accommodation of bodies, accommodation and scuffs. These are held without much adjustment, giving an accuracy of 1 micron round March, approximately. Balanced automatic systems incorporated in the housing of the body give an optimal progress also with high revolutions.