Plunge machining
Superfinish for pinion, cam and crankshafts
In the powertrain of an automobile, some components are exposed to extreme loads. Gears and shafts are among them. Only an absolutely perfect surface guarantees longevity and low wear - and Supfina has the right solutions here.
Our superfinishing machines not only produce components of outstanding quality. They can be used very flexible, and work extremely economically and reliably.
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Video showing raceway machining
CenFlex 1
The Supfina CenFlex 1 covers the entire range of superfinishing tasks in the automotive industry, both in small batch production and series production in flexible production lines.
Depending on the application the set-up is either a one- or multi-step machining process of the workpiece or a step by step process of a camshafts and crankshaft on the same machine.
- Automatic tool adjustment of all installed Superfinishing tape arms to the workpiece
- Up to 15 Superfinishing block or step-by-step (per CNC program)
- Varying types of shafts on the same machine
- Universal loading and unloading: manual gantry loader or swivelling pallet system
| Technical data | |
|---|---|
| Workpiece (shaft) length | 400 – 1000 mm |
| Stroke (for crankshafts) | max. 100 mm optional max. 120 mm |
| Superfinishing tape arms | max. 15 |
CenPro S
By using the Supfina CenPro as our starting point, creating the smaller CenPro S was more consistently achieved.
This modular machine can reduce the footprint by up to 36 percent. A redesigned swivel loader – which moves the workpiece from the handover position of customer’s gantry-loading system into position between centers – eliminates unnecessary machine movements.
This allows fixed piping for the finishing units; far fewer maintenance-intensive hoses and energy guides; and even more reduced installation space.
- Highly stiff frame construction with lighter weight and simplified accessibility
- 300 m tape rolls with a service life of up to 37,500 workpieces
- Proven Supfina systems featuring hard, diamondcoated shoes for high removal rates and optimized microgeometry
- Faster setup times that optimize user-friendliness and machine availability
| Technical data | |
|---|---|
| Workpiece length | max. 500 mm |
| Workpiece diameter swing | max. 200 mm |
| Stroke of pin bearing, top dead center to bottom dead center | max. 100 mm |
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Further information as PDF
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MultiTool
The new Supfina MultiTool combines many years of Supfina surface superfinishing Know How with ideas from our numerous well known customers in the automobile industry as well as suppliers to the automobile industry.
Depending on the customer requirements, superfinishing of high volume workpieces can be optimized to the shortest finishing cycle or designed for flexible production of similar workpieces. Tooling can be either tape or stone.
- Simple pneumatic/electric construction for low acquisition and operation costs
- Compact superfinishing units facilitate the simultaneous finishing of adjacent surfaces, or two step processes with varying workpiece specifications with only one clamping
- Possibility to select individual attachments or arms for rework
| Technical data | |
|---|---|
| Center width | 50 – 500 mm 250 – 700 mm |
| Spindle speed | 100 – 375 U/min optional up to 750 U/min |
| Oscillation Frequency | max. 350 double strokes/min optional max. 800 double strokes/min |
| Superfinishing Attachments | max. 15 |
MultiFlex
Supfina’s MultiFlex series machines are modular constructions. The simple implementation of various processes using the same base machine, e.g. tape superfinishing, stone finishing, ball spindle finishing and brushing make them universally applicable.
In this way, all processes needed to finish state-of-the-art steering racks can be run using the same machine concept, with short cycle times and a high degree of flexibility.
- Machining of steering racks and toothed racks
- Threaded ball spindle finishing
- Y flats finishing
- Superfinishing of the tooth backs
- Superfinishing piston surfaces
- Brush descaling and deburring
- Journal and cam finishing with tape and / or stones
| Technical data | |
|---|---|
| Workpiece length | max. 1000 mm |
| Workpiece diameter | max. 100 mm |
| Ball spindle diameter | max. 35 mm |
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LeanCostMachine LCM
With its new LeanCostMachine, Supfina offers versatility of the highest level for superfinishing small and medium-size runs – economically and flexibly.
The Supfina LeanCostMachine® can be equipped with ready-assembled modules designed to match specific machining tasks. Whether fixed in place, manually adjustable or NC controlled, as many as six Supfina attachments for stone and tape finishing can be used at the same time as brushing and polishing attachments.
- New comfort control panel for easier operation and faster workpiece setup
- As many as six Supfina attachments can be fitted to the NC slide or dovetail guide or installed permanently on the machine base.
- We provide exactly the right workpiece clamping system for every machining process. The changeover is quick and cost effective.
- The workpieces to be machined can be manually placed in adjustable workpiece holders or automatically positioned or fed through by an optional infeed system from above, the front or the side straight into the work space.
- Complete automation (for integration into a production line) is easily implemented.
| Technical data | |
|---|---|
| Distance between centers | 40 – 800 mm |
| Workpiece diameter | 250 mm |
| Superfinish tools | Superfinish tape or stone, cup-wheel, Brushing and polishing disk |
| Superfinishing attachments | 1– 6 |
| Compressed air supply | 4,5 – 6,0 bar |
LCM Crank
The Supfina LCM Crank was developed to complement the high-production CenPro and the CenFlex series crankshaft finishing machine and can be quickly changed over to accommodate a variety of workpieces.
It’s also the perfect machine for those who want to superfinish critical crankshaft surfaces (for example, main, connecting rod, thrust bearings, and oil seal) in small to medium volumes.
- A new comfort-control panel allows easier operation and fast tooling setup
- Up to six Supfina attachments can be installed on an NC slide; a linear ball bearing and guideway assembly; or a dovetail guide. They also can be rigidly mounted to the machine bed
- We offer the right workpiece clamping system for every manufacturing process. Changeover is quick and inexpensive
- Workpieces can be placed manually in the adjustable workpiece supports, or they can be placed automatically by using an optional feeding system from above, from the front, or from the side.
- Complete automation (for integration into a production line) is easily implemented.
| Technical data | |
|---|---|
| Workpiece length | max. 500 mm |
| Workpiece diameter swing | max. 160 mm |
| Stroke of the connecting rod bearing, upper to lower | max. 80 mm |
| Minimum groove width | min. 14 mm |
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Large crankshafts
Supfina also has a solution for the largest ones: weighing up to five tons and five meters long - such gigantic crankshafts are used, for example, in pumps or generators for power generation, in fracking plants, in ship engines or combat vehicles.
The Supfina CenFlex 4 for superfinishing bearing points on large crankshafts is correspondingly large. In addition, extensive sensor technology ensures maximum process reliability.
Supfina solutions for plunge machining
Whether large-scale batch production in assembly lines or small-scale prototype production: The CenFlex 1 can handle the job efficiently. All engine and transmission shafts can be given the precise surface finish that they require.
- Highly flexible machining
- Compact design
- Very short setup times
- Economic and long-term reliable
The Supfina Cenflex 1 is designed for flexible superfinishing of a wide variety of shaft types.
Due to the perfect accessibility of the machining area, thus all working positions are within direct reach of the operator.
Quick and easy changeover when changing workpiece types thanks to automatic pitch adjustment of the superfinishing units in combination with different quick-change systems.
The Supfina CenPro S is designed for series production of a wide variety of crankshafts in horizontal finishing unit arrangement. Loading is performed from the top of the machine by gantry loader. The unique design of the CenPro S allows compact production lines with several coupled stations.
- Excellent accessibility to all components
- Easy view of the machining process
- Operator-friendly design
The CenPro S can be flexibly equipped with superfinishing units depending on the workpiece geometry and surface requirements.
The shaft is clamped pneumatically, as option hydraulically between centers and set into rotation; while an NC-controlled short-stroke oscillation is superimposed.
The optimized tape management of the CenPro S reduces machine downtimes by extending the film change cycles and time-parallel tape disposal.
Both the LCM and the LCM Crank can be loaded and unloaded manually or by means of a gantry loader or robot. This guarantees economical part handling at all times, from one-off production to series production.
