Single-piece and short-run production of components according to customers drawings
22.02.2016

Turned part including milling and grinding

Part: Nut
Material: CuSn12
Heat treatment: None
Finish: None
Tolerance: IT8; radial run-out, axial run-out, concentricity, and coaxility: 0.02
Size: Diameter 66 mm, length 37 mm
Quantity: 10 pcs.

 

Task

  • Manufacture part exactly according to the drawing
  • Observe position tolerances
  • Small number of units

Solution 

Perform steps of the procedure in the correct order:

1. Turning (with grinding allowance where needed) with thread
2. Surface grinding (faces)
3. Milling and drilling
4. Deburring
5. External cylindrical grinding
6. Outgoing inspection

22.02.2016

CNC turning

Part: Piston
Material: CuPb15SN
Heat treatment: None
Finish: None
Tolerance: IT7, IT9
Size: Diameter 25 mm, length 28 mm
Quantity: 15 pcs.

 

Task:

  • Manufacture part exactly according to the drawing
  •  Simple turned part
  • Produce parts as quickly and cost effectively as possible

Solution:

Produce parts entirely on a CNC lathe to keep cost to a minimum

1. Full CNC turning 
2. Outgoing inspection

22.02.2016

Milled part incl. plasma nitriding and bushings

Part: Plate
Material: 1.8519 (bushings: bronze)
Heat treatment: Tempering, annealing, plasma nitriding
Finish: None
Tolerance: IT7; flatness 0.02 mm
Size: Approx. 190 x 185 x 15 mm
Quantity: 2 pcs.

 

Task:

  • Manufacture part exactly according to the drawing
  • Ensure the part meets requirement for flatness
  • Small number of units

Solution:

Manufacture the entire part including heat treatment and procuring the bushings

1. Rough-machine milling groove
2. Tempering to 900–1000 N/mm.
3. Stress-relief annealing
4. Full milling and drilling
5. Deburring
6. Intermediate check
7. Plasma nitriding to 700–800 HV, depth 0.4–0.5 mm.
8. Finish bushings to correct length and deburr
9. Insert bushings
10. Outgoing inspection

22.02.2016

Hollow shaft

Part: Hollow shaft
Material: C45
Heat treatment: None
Finish: Galvanized (partially)
Tolerance: IT6; radial run-out, axial run-out, concentricity, and coaxiality: 0.02
Size: Diameter 75 mm, length 172 mm
Quantity: 2 pcs.

 

Task:

  • Manufacture part exactly according to the drawing
  • Complex cylindrical and surface grinding
  • Small number of units
  • Galvanization (partial coverage)
  • Relative precision required

Solution:

Perform multiple steps to assure quality; produce on 'first attempt'

1. Turning (with grinding allowance where needed) without thread
2. Galvanization
3. Thread cutting
4. External cylindrical grinding
5. Surface grinding (faces) 
6. Internal cylindrical grinding
7. Mill groove
8. Finish 

9. Outgoing inspection

CONTACT
VMV, spol. s r. o.  
Žizkova 4318/53 Phone: +420 567 304 921
58601 Jihlava E-mail: info@vmv.cz
Czech Republic