German Forming Keyway Machine
German molding bed

workerExample of the case

application area

Keyway Processing - Principles - Advantages
1) How to process keyways
Keyway machining refers to a method of gradually cutting keyways. The tool is pulled vertically up and down along the hole in a continuous motion, accompanied by a horizontal thrust.
During each cutting process, the feed rod located between the tool holder and the lead rod moves downward, generating a horizontal thrust that pushes the tool holder forward. To ensure the safety of the knife
The safe processing of tools and workpieces involves lifting the feed rod upwards and retracting the tool before it moves upwards. Keyway machine tools are equipped with a double stand
Column hydraulic guidance system. The inline cutting tool and feed tool holder form a completely linear motion combination within the cutting tool and machine tool system, avoiding
Without lateral force and leverage effect, the machine can operate very persistently and almost without wear.
2) Basic function - slotting processing

3) Advantages compared to key insertion processing
·High precision
Due to the fact that the tool has lead slots along the entire length of the keyway, keyway machining has higher accuracy. (Offset, depth, axis parallelism)
Higher surface quality, as the tool and workpiece are fixed to the same guiding device through a centering device
·More economical
Higher cutting value, as the tool cutting does not produce any bias phenomenon at the same time (ensuring cutting speed and feed)
The workpiece and tool are fixed on one unit to obtain
-Longer tool life
-More optimized process parameters
·Strong flexibility
-Can easily cut wider and longer keyways (maximum length of 2000 millimeters, width up to 150 millimeters)
4) Advantages compared to lathe machining
·High precision CNC machining
-Blind hole processing
-Spiral groove
-Oil tank

All with excellent quality
·More economical
-Low space requirements for machine tools, even for machining specially elongated or widened keyways
-Smooth cutting of workpieces (without warping)
-Low tool cost, customers can re polish the tool
-Short delivery time for cutting tools, reasonable prices for special size cutting tools
-Workpiece alignment and clamping components are cost-effective
·Strong flexibility
-Can be equipped with highly automated quick clamping devices (hydraulic or pneumatic pneumatic drive)
-Tool width adjustment is very convenient

Machine Tool Series
1) Machine tool model
·Polymat 25/32 NC

The NC series machine tools are capable of completing the following tasks with excellent performance:
Through hole slotting/forming single or multiple slots inside the hole
Usually, multi slot machining machines are equipped with manual indexing plates.
Most NC series machine tools have two axes (control axis).
·Polymat 70/100/125 CNC

The control axis of CNC machine tools can be interpolated. Therefore, in addition to standard slide keys formed according to DIN6885 or custom through-hole molding, the machine tool can also process:
-Oblique keyway
-Oil tank
-Blind hole groove
-Spiral groove
In addition to manual indexing discs, automatic indexing discs (third CNC axis) can also be used on this type of machine tool for standard and non-standard multi groove/forming (serrated/spline/involute profile/...).
Therefore, single piece processing, small batch processing, and large batch processing are equally economical. Machine tools can also be integrated into a complete production line, in which case the machine tool can automatically load workpieces and operate without personnel for several hours.
·Polyjet

The "Tough" Keyway Machine POLYJET 50 provides users with a new slotting and forming process. The birth of this new machine tool signifies the perfect combination of the excellent performance of the complex lathe and the high flexibility and efficiency of the keyway machine tool.
The cutting speed is extremely high, up to 120 meters per minute, and can be hard machined.
If a shorter processing time is required, Polyjet machine tools can be used for soft machining.
2) Technical parameters

Components, drives, controls, and operating elements
1) Select accessories

-Manual indexing disc - automatic workpiece clamping - automatic chip removal
-Automatic indexing disc - inclined platform for machining conical inner hole grooves - tool adjustment system
-Mobile handheld terminal for large workpieces - automation
2) Linear drive system

The Polyjet 50 is driven by a high dynamic linear drive. This drive device has low maintenance, no wear, and a cutting speed of up to 120 meters per minute.
3) Hydraulic Drive

With precision manufactured piston rods, the dual column hydraulic guidance system ensures the highest accuracy of the feed tool holder. The piston rod and hydraulic oil are in the same unitProvide guidance and drive within the yuan. Hydraulic oil is also beneficial for ensuring long-term lubrication of the system. Therefore, the machine tool will not require maintenance due to lubrication issues.
4) Control system

·S7-314 PLC controller, 5.7-inch display screen, touch sensitive keyboard
·Controlled by 2-4 CNC axes
·Tool feed (X), one rotating shaft (B) for multiple keyways, and optional automatic loading device
·User local language operation
·Can store up to 250 important program parameters:
-Diameter
-Slot width
-Groove depth
-Slot length
-Feed rate
-Tool type
-Cutting speed
-Empty itinerary setting
Using CNC technology to achieve precise Z-axis positioning
All axes use high-precision rotary encoders
Fault diagnosis system directly displayed on the screen
PDA and program transfer optional interface

Tool set, blade and centering device
1) Tool matching group

Each tool set covers a specific machining range:
-Slot width
-Aperture
-Slot length
According to different processing tasks, it is necessary to choose appropriate tools for each. The cutting tools that cooperate with the cutting task also need to be adapted to the required tool matching set.
2) Standard cutting tools for forming and keyway machining machines

3) Lining and regulating device
·Cone shaped liner

The conical surface is in direct contact with the inner circular edge of the workpiece, tightly fitting to ensure accurate relative position between the workpiece and the tool.
·Stepped lining

The stepped bushing relies on the inner circular edge of the workpiece to ensure the relative position between the workpiece and the tool. The stepped bushing is also used to clamp the upper surface of the workpiece.
·Continuous adjustment device

The workpiece is clamped by a three-point clamping system with fixed and adjustable devices. The workpiece can also be firmly clamped even in the case of eccentricity.

4) Application of aperture of centering device