1. Product overview:
A . High rigidity -- high rigidity design of machine tools and grinding wheel holder, workpiece head holder, feed mechanism, etc., for large size, multi-allowance, high hardness products of inner hole grinding power technology.
B. High efficiency -- different grinding spindles are selected to adapt to the processing of products with different apertures. Besides diamond pen, roller dressing is also available for dressing. Ceramic CBN grinding wheel can be used for efficient grinding, and Mabus inner diameter measuring instrument can be used for online inner diameter measurement.
C. High stability - the key parts of the machine tool are selected international top brands, to ensure the reliability and precision stability of the machine tool in the life cycle.
D. High convenience - graphical software design, allowing the operator to enter parameters through a user-friendly interface, so as to quickly generate workpiece grinding, grinding wheel dressing, online measurement and other related procedures.
E. High safety - fully closed machine guard and advanced specifications toughened glass observation window, emergency stop, one button back, safety door interlock design for operators to provide security.
2. Customer's work drawings and processing requirements:
| Workpiece drawing accuracy requirements (grinding precision confirmation) products |
| Grinding position: one inner circle and one end face marked by red line |
| Precision requirement |
Attainable value |
| 1 |
Roughness |
Ra0.8 |
Satisfy |
| 2 |
Diameter tolerance |
Φ21.991 |
Satisfy |
| Job information (for pre-grinding state) |
| 1 |
Name |
|
Hardness |
|
| 2 |
Drawing number |
|
Heat treatment method |
|
| 3 |
Material |
|
Grinding allowance |
|
| Grinding wheel information |
| NO. |
Size (D outer diameter *T thickness *H inner diameter) |
|
| 1 |
Grinding wheel specification |
|
| 2 |
Maximum allowable linear speed (m/s) |
|
| 3 |
Needle grinding wheel using dressing beat |
According to grinding allowance |
The grinding scheme is as follows:
Grinding time: (Note: this is the grinding time, theoretical analysis, the specific subject to the actual processing) |
3. Structural characteristics:
Strong grinding force, for large size large margin workpiece inner hole grinding unique design model structure optimization
Pay attention to high rigidity and high stability
The pursuit of high efficiency grinding and can be equipped with Mabus inner diameter measuring instrument
Ceramic CBN grinding wheel and diamond roller dressing can be used for the efficiency and precision of special grinding material
4.Technical specifications of machine tools:
| Project |
Parameter |
| Processing capacity |
|
| Grinding aperture range |
Φ6~φ200mm |
| Maximum grinding depth |
170mm |
| Maximum outer contour diameter of grinding workpiece |
220mm |
| Grinding diameter |
400mm |
| Mounting chuck specifications |
6 "hydraulic chuck/manual chuck |
Angle of head box rotation |
Two degrees before and 20 degrees after |
| Grinding wheel spindle parameters |
|
| Inner hole grinding spindle power |
7.5KW |
| Linear speed of grinding wheel |
20~30m/s |
| Head frame spindle parameters |
|
| Spindle speed |
50-1500rpm |
| Spindle form |
Sleeve structure bearing spindle |
| Cone-hole specification |
MT-5 |
| Spindle drive mode |
Servomotor |
| X axis (workpiece spindle) |
|
| X-axis feed stroke |
410mm |
| X axis fast moving speed |
0.1~10mm/min |
| X-axis feed minimum resolution |
0.001 |
| X axis servo motor power |
2.2 KW |
| Z-axis (workbench) |
|
| Z axis axis fast moving speed |
0.1~10mm/min |
| Z-axis feed minimum resolution |
0.001mm |
| Maximum travel of Z axis |
410mm |
| Z-axis servo motor power |
2.2KW |
5.Functional accessories (optional):
(1) Standard or special tooling scheme
(2) Cooling filtration system/oil mist absorption recovery system
(3) On-line measuring instrument system (on-line measuring, end face on-line measuring and inner diameter on-line measuring, on-line dynamic balancing of grinding wheel, air elimination range, anti-collision)
(4) Chuck, chuck and center frame, etc
(5) Diamond wheel trimmer
(6) Automatic door, power tooling
(7) Workpiece automatic loading and unloading scheme
6.Automatic Centralized Lubrication system:
An automatic centralized lubrication system lubricates the machine linear guides and ball screws continuously, which makes sure longer service life and high precision. And the cooling system is separated with machine base, which eliminates vibration and helps heat radiation.
7.Grinding wheel spindle:
The grinding wheel spindle is of high speed, high precision, high rigidity, low vibration, and low temperature rise. The spindle is water-cooling and stable temperature, that keeps the spindle high efficiency. There are optional rotary speeds range 24000-60000 rpm for the spindle. For a deep inner fine grinding, there are custom integrated spindles.
Integrated deep hole spindle
8.Z-axis feeding device:
High precision pre-tighten linear guides are used, which can bear the loading from different directions. The low friction-coefficient & moving-clearance guides, together with the high grade ball screws, make the minimum feeding 0.001mm realized in the program.
9.Head stock:
10.CNC operation system:
Siemens 828D CNC system is used.
- Grinding program is created automatically through the user-friendly interface, using graphical programming tools shopmill / shopturn, unnecessarily needing special G codes (Optional).
- No need battery or cooling fan. And no need memory battery for the motor coder.
- Ethernet connector. No capacity limit USB (on line) and CF card. The programs in USB and CF card can be modified at will. Process monitor on line. And the data can be saved forever.
- Process showing with animation. High efficiency.
- There are kinds of optional functions, including automatic end-surface measuring, automatic inner diameter measuring, hydraulic tail stock, highly integrated auto loading and unloading system, and so on.
- Automatic wheel dressing and offset. Keep high precision and stability for the feeding and grinding.
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