Sunday, April 14, 2013

CNC universal tool grinder new technology


In recent years, the tool industry is gradually shifted from mass production standard tool mode to small batch production of many varieties of special tools mode conversion. How fast and stable user needs a special tool to the market has become an important issue placed in front of the tool manufacturers. Industry-leading is 20 years ago, began the development of CNC tool grinder is headquartered in Melbourne, Australia, ANCA (green cards, site group: official Chinese name of the company now for Ocamar) Pty.Ltd. 

The tool grinder Anka production five types: the TX7 production, regrinding RGT type, thread processing TapX the SBG-type blade processing, stamping tools PGX type. Here are the best-performing TX7 tool grinder. 
Anka developed 5-axis + 4-axis controlled CNC TX7 universal tool grinder bed resin concrete developed by the company, its excellent damping performance equivalent to nine times the cast iron bed. Wide space of the machine according to the three-dimensional CAD design, the front of the spindle close to the mechanical center position of the rotating column, are able to achieve high precision grinding spindle structure in arbitrary radius, and the basic parameters of the machine are shown in Table 1.
Table 1 TX7 machine parameters
Maximum tool length
300mm (maximum cutting edge length 250 mm)
Tool diameter
200mm
Maximum tool weight
25kg
Wheel spindle motor power
18kW (24HP) (built-in motor)
Grinding wheel spindle
Big-plusBT40
Wheel component count
2
Machine weight
7500kg

Mould Network

Figure 1 CNC universal tool grinder TX7 +
To operate, high production efficiency TX7 main function is as follows: 

All axes are used to directly drive 

NC tools in general grinding wheel spindle or linear motion axis by means of a belt driven by the motor shaft gear. The green card spindle, linear motion and rotary axes completely direct drive, in addition to all belts and gears. Anka's leading position in this field. 

· MPG-feed 

Using the manual pulse generator, fast and secure program detects operator of NC-controlled action. The use of this feature, the operator can perform simple input, output and fast setup program, thus shortening the adjustment time. 

· Automatic grinding wheel replacement 

The two sets of wheels (each consisting of four wheels and cooling device) can be replaced at the same time in the 4s. To improve accuracy, the grinding wheel spindle Showa Seiko mechanical clamping system. Each wheel can be adjusted to the coolant conduit, and the completion of the new wheel and the adjustment of the cooling fluid conduit in 2min. 

· Big Plus grinding wheel clamping system 

Patented product - Big Plus wheel clamping system using Showa Seiko machinery company, cone and end face contact on both sides, so as to ensure a high precision. Accurate clamping of the grinding wheel assembly to improve the accuracy and performance of the tool. In this way, both fully improve the processing capacity of the grinding wheel itself and prolong the life of the grinding wheel. 

· High-speed workpiece axis 

The high-speed the workpiece shaft (3000r/min) once installed will be able to cylindrical grinding, one-time installation manufacturing step drill. The axis of the workpiece can also be installed performance correction device for efficient, high-precision correction processing. Optional correction device can be maintained in the long processing consistency in the quality of the punch and die. 

Toolroom software 

Green card as a leader of the NC tool grinder software technology, the software market iGrind, iBurr, iProfile, CIM 3D and iFlute, for two reasons: the versatility and flexibility of its software technology has enduring. 

· To improve the machining accuracy of the function 

Green card company to develop and bring to market many products to achieve better machining accuracy, here are two cases. 

* IView tool measuring system (see Figure 2)
Mould Network

Figure 2 iView system use cases
The contour of high precision grinding Christmas tree cutter tool. Anka developed sophisticated iView high-speed cameras can be measured in the clamping state, can be installed on any X-rated CNC tool grinder and accurate determination of the tool in a matter of minutes. iViewcamera and software programs combination of the following determination: the contour of the tool (end mill, ball end mill, R fillet end mills), tool diameter, given angle in 3:00, 3:00 given radius.
Mould Network

Figure 3 iView screen display
The characteristics of the the iView high-speed camera can not be removed from the grinder tool Determination will need to be amended for the cycle times longer tool or measurement tool regrinding effect is very obvious. In addition, it can be simple determination of 5 μ m with a tolerance band is displayed on the screen (see Figure 3). iView with the preservation of the measurement data transmitted automatically create reports and print functions. Precise measurements and iView camera installation tool grinding state, thus ensuring a high-precision measurement. 300 times using high-precision camera can be determined to 2 mu m. 

* Fine-tuning chuck system (MACS) 

MACS (patent pending) is a green card company to design high-precision collet system. It can be corrected and the elimination of axial and radial runout control the beating of 50mm at 3 mu m or less, automatic and manual feeding beating control minimum. The range of diameters can be clamped for 2 to 27mm, and TX7 corrector with. 

* Automatic loading and unloading 

In order to increase productivity, TX7 configure the following for optional automatic loading and unloading device, the device is designed in the back of the machine, optional fitted. 

- Individual trays loaded automatically 

Tray capacity: tool diameter 25mm above 40, the tool diameter 3 ~ 16mm 220. Pallet load cycle time of loading for 16s. Machine automatic production of software can be a different shape of the grinding tool. 

- 5 trays loaded automatically 

Basic parameters and leaflets trays automatically loaded the same. The tray capacity of 1100. 

- Automatic loading robot 

Load cycle time of 10s, is characterized by a humane system of procedures, clean design and anthropomorphic principle. 

The TX7 of unique applications 

1) Christmas tree cutter grinding 

When processing Christmas tree cutter eccentric groove, different spiral groove requires a different profile shape of the grinding wheel. How to reach the spiral required on the contour of processing difficulties.
Mould Network

Figure 4 Christmas tree cutter
To meet this requirement, the green card has developed a special application software and processing procedures, the use of standard R-shaped grinding wheel, eccentric groove profile shape along the spiral groove processing. 

The software determination of the shape of the groove-shaped cross-section profile were measured to determine accurately the groove of the profile shape processing in order to determine the exact location of the processing sites. The handler for each groove was measured to ensure the accuracy of each surface. The profile shape from the DXF file import, wheel components must be properly selected. Shape of the grinding wheel, in particular, is the accurate determination of the radius of the arc is very important.
Mould Network

Figure 5 Determination of groove shape contour of instances
2) High-speed Mogou "FASTgrind" grinding technology 

Has been high-speed steel drill bit to use aluminum oxide or CBN grinding wheel, with more than one machine production, from raw materials to complete the production process of the drill is semi-automatic and manual control, drill varieties change, the machine reset difficult, cumbersome, and more than special machine investment cost of products greatly improved, so only a handful of companies can be equipped. 

To solve this problem, green cards and Dorset high bein (Sain-Gobain) to develop a production of high-speed steel drill bit "FASTgrind" new grinding technology, the advantages of less investment, strong adaptability. This highly efficient high-speed steel drill bit and tap grinding technology is not only used in mass production.
Mould Network

The Figure 6 speed Mogou FASTgrind technology
The grinding technology "FASTgrind" is the Aulos Wheel "on the basis of production by the ANCA TX7 CNC tool grinder and NortonAbrasives. In the past, only the CBN grinding wheel CNC grinder to meet the production of high-speed steel drill bit grinding wheel is very difficult to correct. In feed rate, a lot of CNC grinding machine also had problems. Dorset high bein Aulos wheel, high-performance model developed for these defects CBN grinding wheel. The patented long shape of the wheel than ceramic abrasive greatly increasing the flexibility of the grinding, the side with the groove allows the wheel to far more than the CBN grinding wheel speed machining grooves. The TX7 with Norton Aulos wheel combination of a conventional manner not super-short period of time was adjusted to become possible. (End)
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