- Overview
- Main Options & Brief Spec
- Strengths
- Control System
- Technical Details
Semi-Automatic Grinding Machine for PCD, PcBN
& Carbide Tools
Coborn’s RG5B-XD is a very rigid machine, purpose designed for grinding the latest, super-hard tool materials. Tool formats possible include:
- PCD & PcBN tipped turning/milling inserts and shank type tools
- PCD & PcBN multiple flank and multiple radii tools such as grooving tools
- Tools with multiple clearance angles
- PCD tools such as end mills, reamers and multi-tooth saws with optional rotary fixture
Wheel speed, wheel direction, stroke position and stroke amplitude can be set from the touch-screen. These tool blocks can be stored as a tool program for later recall or modification from the in-built industrial PC.
The machine may be fitted with an optical projector or the enclosed VS5-G vision system (as shown).
In-process measurements are possible with the additional VS5-GM vision system measurement module.
Main Options
- Variable speed inverter drive wheel head
- Digital pivot angle display
- Rotary fixtures – CF10 or CF14
- Central lubrication system
- Pneumatic pivot lock
- Hand wheel - fine traverse adjustment
- Air blast tool drying
- Audio touch probe
- Metric or imperial
- Automatic Pivot (RG5C)
Brief Specification
| Grinding motor | 2.2 kW |
| Oscilation | 300mm max |
| Traverse speed | 0.1 - 50mm/sec |
| Acceleration | Programmable |
| Wheel format | Vitrified bond, 6A2 |
| In-feed travel | 35mm |
Controls
| Steps per tool | 25 max |
| CNC Controller | Industrial PC |
| Back up | via Ethernet or USB port |
| X Y read outs | 1 μm |
Work range
| Cross-slide travel | 40mm |
| Maximum radius | 35mm |
| Conical clearance | 0-25 degrees |
| Cylindrical clearance | 0-25 degrees |
| Pivot motion | 200 degrees |
Strengths
- Extremely rigid construction, designed for PCD tool manufacture. Enhanced working envelope size
- Touch-screen control program blocks
- 25 memories for stroke start positions and stroke lengths, programmed reciprocation amplitude with digital position readout
- One touch, automatic view facility without loss of position
- 1 micron wheel infeed resolution
- Conical clearance movement up to 25 degrees. Via a single hand-wheel
- Tool radius up to 35mm
- Adjustable grinding pressure
- Fully compatible with Coborn fixtures
- Can be fitted with a projector or camera /monitor system/ vision system (VS5)
- Vision system with measurement module (VSS-M) available
- Rotary fixtures, tool nest/holders available
- Can be supplied with or retro-fitted with Automatic Pivot (RG5C)
Control System Features
- Control via an industrial PC, software by Coborn Engineering
- Easy to control, no ‘computing’ know-how necessary
- Input via a large, easy-to-read 15” touch-screen
- Tool programs quickly and easily developed ensuring minimal setup time
- Reciprocation amplitude and position stored and adjustable to 1 micron
- Reciprocating speed stored and adjustable from 0.1 to 50mm per sec
- Automatic view position facility, allows one-touch viewing and return
- Digital readout with one micron resolution, switchable from mm to inches
- Control unit is mounted on double swivel and tilt arm for convenient positioning
- Remote diagnosis over internet
- Network to central tool file repository
Technical Details
| Characteristic | Details |
|---|---|
| MACHINE | |
| - Machine type | Manual PCD Grinding Machine |
| - Dimensions - main machine (w x d x h) | 1,400mm x 1,270mm x 1,860mm |
| - Total machine weight | 7700kg |
| CONTROL SYSTEM | |
| - Industrial PC + touch screen | Yes |
| - Blocks per tool program | 25 maximum |
| - Block records - wheel speed - wheel direction - wheel position - wheel stroke amplitude |
Yes Yes Yes Yes |
| - Internet connection | Via ethernet port |
| - Software upgrades, maintenance via Internet | Yes |
| OPTICS | |
| - Options available | Microscope / Projector / VS5G / VS5G + M |
| - Optics adjustment | X & Y slides = 30mm; Z slide (focus) = 50mm |
| WHEEL SPINDLE | |
| - Spindle type | Coborn precision, dynamically balanced |
| - Wheel spindle drive power | 2.2kW |
| - Speed range (if no inverter supplied) | Hihg speed - 4,000rpm, Low speed - 2,000rpm |
| WHEEL IN-FEED | |
| - By hand wheel | Yes |
| - In-feed travel available | 45mm |
| - In-feed travel resolution | 1µm (via Renshaw encoder) |
| - Typical roughing in-feed rate on PCD | 12 - 15µm/sec |
| - Typical finishing in-feed rate on PCD | 3 - 5µm/sec |
| - Grinding pressure adjustment | 90 Newtons minimum to be 'locked' |
| WHEEL STROKE | |
| - Maximum stroke length | 300mm |
| - Wheel stroke frequency | 0 - 100 Hz (typicaly used at 25Hz) |
| WHEEL STROKE POSITION | |
| - By hand wheel | Yes |
| - Wheel stroke position adjustment | Repeatability 10µm |
| WORK TABLE - 'BOOM' | |
| - Manually adjusted via one hand wheel | Yes |
| - Inclination (for conical clearance) | 0 - 25 degrees |
| CROSS SLIDE | |
| - Clamping surface size | 260 x 130mm |
| - Cross table travel range | 30mm |
| - Cross table position resolution | 10µm via vernier scale on handles |
| PIVOT | |
| - Pivot motion | Manual |
| - Pivot movement | 200 degrees |
| - Pivot setting | via vernier stops (4 available) |
| - Pivot position acuracy | +/- 1 minute of arc (readout on touch scren) |
| - Maximum tool radius | 0 - 35mm (40mm possible) |
| TOOL POST | |
| - Tool post hand | Righ hand fitted as standard |
| - Tool nest format | Square fitted as standard |
| - Tool nest height adjustment | Yes |
| - Tool nest tilt (cylindrical clearance} | ± 20 degrees |
| GRINDING WHEELS | |
| - Wheels bond type recommended | Vitrified bond |
| - Format | Usually 6A2 |
| - Wheel grit size for roughing PCD | Typically D25 - D35 |
| - Wheel grit size for finishing PCD | Typically D5 - D10 |
| - Wheel arbor | Required; allows rapid wheel changes |
| DRESSING | |
| - Method | By dressing stick |
| - Stick recommended | Aluminium Oxide, 20mm x 20mm, 400# |
| LUBRICATION | |
| - By hand pump to nipples | Yes |
| COOLANT UNIT | |
| - Coolant unit dimensions (w x d x h) | 1,150mm x 500mm x 670mm |
| - Coolant unit weight | 118kg |
| - Coolant pump power | 0.12kW |
| - Coolant tank capacity | 100 litres |
| - Coolant ump flow rate | 50 l/min |
| ELECTRICAL REQUIREMENTS | |
| - Electrical Requirements | 3 phase, 415v or 220v |
| OPTIONAL EXTRAS - NOT A COMPLETE LISTING | |
|---|---|
| 1. Inverter for wheel spindle speed control | Available |
| 2. CF10 Coning & Indexing Fixture - Face plate for adapters - Maximum diameter - Maximum tool length |
Yes - further information available 90mm for HSK, ISO,MK, Hydraulic chucks etc. 150mm 160mm from face plate |
| 3. CF14 Coning & Indexing Fixture - Face plate for adapters - Maximum diameter - Maximum tool length |
Yes - further information available 105mm for HSK, ISO,MK, Hydraulic chucks etc. 220mm 160mm from face plate |
| 4. KF2 - 'K' land attachment - For creation of K lands on PcBN tipped inserts |
Available |
| 5. Centralised lubrication | Available |
| 6. Tool nests | Many types available; tilting, round, square, V etc. |
| 7. Left hand tool post | Available |
| 8. AD1 - Digital pivot angle read-out | Available |
| 9. Auto tool air-blast | Available |
| 10. Grinding wheels | Available |
| 11. Wheel arbors | Available |
