Medical
This case is from Netherlands customer that with many Strict requirements on the quality, we have made a sample first .then we have made several Medical other cases that also with the Same difficulty.
Example . Cabinet
skills requirement
1.Material: HT150. 2.All chamfer C2. 3.No rounded corners R2~R5.
1. Part drawing analysis
1) The axis coaxiality tolerance of ϕ52 ＋ 0. 025 the two inner holes in Figure 9-8 is ϕ0. 005mm.
2) The part material is HT150.
3) Artificial aging treatment.
2.Process analysis
1) The axes of the ϕ52 ＋ 0. 025 two inner holes are coaxial. In order to ensure this requirement, first draw a line, and rough mill the D and B surfaces.
Then finish milling the D surface or grind the D surface to ensure that the flatness tolerance of the D surface is within 0.01mm, and then use the D surface as the reference to fine boring the ϕ52 ＋ 0. 025 inner hole.
2) When machining ϕ52 ＋ 0. 025 inner holes, rough and fine boring are required.
The machining process of the box body (unit: mm)
| Part Name | Blank species | Material | Production type |
|---|---|---|---|
| Box | casting | HT150 | Small batch |
| Process | Work step | Process content | Equipment | Tools, measuring tools, auxiliary tools |
|---|---|---|---|---|
| 10 | Casting | |||
| 20 | Aging | |||
| 30 | Oil primer | |||
| 40 | Scribe: Ensure that ϕ52 + 0.025 has a machining allowance for the inner hole and is as uniform as possible | Marking table | ||
| 50 | Rough milling | |||
| 1 | Aligning according to the line, rough milling D surface, leaving the amount of fine milling 2 | Vertical milling machine | Disc cutter | |
| 2 | Rough milling of B side, leaving fine milling amount 2 | Vertical milling machine | Disc cutter | |
| 3 | Rough milling of E face, leaving fine milling amount 2 | Vertical milling machine | Disc cutter | |
| 4 | Rough milling of F surface, leaving fine milling amount 2 | Vertical milling machine | Disc cutter | |
| 60 | Milling, drilling | |||
| 1 | Finish milling D surface, surface roughness Ra3. 2μm | Vertical Machining Center | Disc cutter | |
| 2 | Drill 4 × ϕ12 holes, surface roughness Ra3. 2μm | Vertical Machining Center | ϕ12 Twist drill | |
| 3 | The countersink ϕ28 hole is formed, the guaranteed size is 15, the surface roughness is Ra3. 2μm | Vertical Machining Center | ϕ28 Countersink | |
| 4 | Turn it over, take the D surface as the reference, press it with a pressing plate, and finish milling the B surface. The surface roughness is Ra3. 2μm | Vertical Machining Center | Disc cutter | |
| 5 | Drill the M10 threaded bottom hole to ϕ8.5 | Vertical Machining Center | ϕ8.5 Twist drill | |
| 6 | Tap M10 threaded hole | Vertical Machining Center | M10 thread tap | |
| 70 | Milling, boring | |||
| 1 | Finish milling E surface, surface roughness Ra3. 2μm | Horizontal machining center | ||
| Disc cutter | ||||
| 2 | Rough boring ϕ52 + 0.025 inner hole to ϕ50 | Horizontal machining center | Rough boring tool | |
| 3 | Fine boring ϕ52 + 0.025 inner hole to request, surface roughness Ra0. 8μm | Horizontal machining center | Fine Boring Tool | |
| 4 | Do not loosen the pressure plate, rotate 180° horizontally, finish milling F surface, surface roughness Ra3. 2μm | Horizontal machining center | ||
| Disc cutter | ||||
| 80 | Test | Inspection station | ||
| 1 | Check the size and surface roughness of each part | |||
| 2 | Inspection ϕ52 + 0.025 Tolerance of axis coaxiality of two inner holes | |||
| 3 | Fill in the inspection report | |||
| 90 | Warehousing |