DrillMeister – Tube sheet – DMM head
IMPROVE TOOL LIFE & PRODUCTIVITY
This case involves drilling for tube sheet, a component used in heat exchangers.
Because the material was a high-hardness stainless steel, short tool life had been a major issue.
We proposed the newly developed DMM head, designed specifically for stainless-steel applications. A
fter making minor adjustments to the cutting conditions, machining was performed at a 20% higher productivity than the previous setup.
As a result, the new tool achieved 1.8 times the number of holes compared with the existed tool.
Share
| Industry | Heat Exchanger |
|---|---|
| Component | Tube sheet |
| Material ISO code |
 M - Stainless steel |
| Work material | Duplex stainless steel |
| Material hardness | 30 HRC |
| Machine(spindle type) | Vertical Machining Center Large(#50,HSK100) |
| Tool family | Holemaking |
| Tool category | Through holes |
| Product name | DrillMeister |
| TSR No. | 5436H |
Tool
| Tungaloy | Competitor | |
|---|---|---|
| Body | TID190F25-5 | Head exchangable drill 5xD |
| Head | DMM1927 AH9130 | Drill head |
| Grade | AH9130 | PVD |
Tool life
| Tungaloy | Competitor | |
|---|---|---|
| Tool life (m/insert) | 15.6 | 7.9 |
Cutting conditions
| Tungaloy | Competitor | |
|---|---|---|
| Tool diameter DC (mm) | 19.27 | 19.27 |
| Hole tolerance grade | IT10 | IT10 |
| Hole depth H (mm) | 38.1 | 38.1 |
| Cutting speed V/c (m/min) | 48 | 52 |
| Feed f (mm/rev) | 0.13 | 0.08 |
| Feed speed Vf (mm/min) | 101 | 71 |
| Coolant | Internal coolant (emulsion) | Internal coolant (emulsion) |