スクロールで表全体をご覧いただけます。
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Surface roughness is poor. | Cutting marks are conspicuous. | Reduce the feed. |
| Deposition occurs on the cutting edge. | Increase the concentration of cutting fluid (water-soluble). | |
| The machine vibrates. | Suppress machine vibration. Secure dynamic balance. |
|
| Abnormal cutting marks are present. | Check the tool setting again. | |
| Burrs are generated. | The thrust force is large relative to workpieces and machine rigidity. | Reduce the infeed or feed. |
| Chattering occurs. | The principal force is large relative to workpieces and machine rigidity. | Reduce the protrusion of the tool. Reduce the cutting speed, infeed and feed. Reduce the corner radius. |
| Iridescent surface occurs. | Small streaks due to minute chipping of the cutting edge occur on workpieces to cause interference with light. | Reduce the feed. Re-polish. Reduce the removal amount (preventive). Do not touch the cutting edge and tool (preventive). |
| Cloudy scratches are present. | Chips adhere to the cutting edge to scratch workpieces. | Check to see if cutting fluid is being supplied to the tool. Increase the concentration of cutting fluid (water-soluble). |
| Chips are hitting workpieces. | Blow chips by air mist. Suck chips by vacuum. |
|
| Sharp and irregular scratches are present. | Chips are hitting workpieces. | Blow chips by air mist. Suck chips by vacuum. Increase the concentration of cutting fluid (water-soluble). |
| Sharp and regular scratches are present. | An area outside the cutting edge (including chipping) is in contact with workpieces. | Check the setting. Check the interference of the flank. Re-polish. |
スクロールで表全体をご覧いただけます。
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| The machining diameter is small. | The spring back is large. | Reduce the feed. Enlarge the prepared hole to reduce the removable amount. |
| The roundness is poor. | If a side hole is required, machine it later. Conduct reaming in the same process as drilling of the prepared hole. Reduce the revolution. |
|
| The machining diameter is large. | The tool on the machine runs out. | Set the tool on the machine to tool run-out less than 0.01 mm. |
| The holding power is weak. | Reduce the revolution and increase the feed. Make the prepared hole smaller to increase the removable amount. |
|
| The machining diameter of the entry is large. | The reamer runs out. | Set the tool on the machine to tool run-out less than 0.01 mm. Reduce the feed speed on entry. |
| The reamer moves on entry. | Change the process to prevent intermittent cutting on entry. Reduce the revolution. Shorten the axial distance between the tip of the guide and the cutting edge. Shorten the protrusion from the holder. |
|
| Sharp marks are present on the inlet. | An area other than the cutting edge is in contact with workpieces. | Reduce the feed speed on entry. Set the tool on the machine to tool run-out less than 0.01 mm. |
| Black vertical streaks occur. | Chattering occurs due to large resistance of the blade part | Reduce the revolution. Increase the concentration of cutting fluid or use oily fluid. |
| Chatter marks are present on the bottom. | The rigidity is not sufficient. | Shorten the protrusion from the holder. |
| The cutting resistance on the bottom becomes large. | Check the reamer clamp and workpiece clamp. Shorten the protrusion from the holder. Reduce the revolution. Reduce the removable amount on the bottom. |
|
| Short-pitch cloudy surface | Chips get caught. | Increase the concentration of cutting fluid or use oily fluid. |
| Return marks are conspicuous. | The positional deviation of the prepared hole is large. The cutting force is not uniform. |
Reduce the feed speed on entry. Check to see if workpieces did not move after rough machining. Conduct reaming in the same process as drilling of the prepared hole. Check to see if the reamer axis of rotation matches the feed direction. |
| The entire hole becomes blackish. | The cutting resistance of the blade part is large to cause burn. | Increase the concentration of cutting fluid or use oily fluid. Reduce the revolution. Reduce the removable amount. |