YLE CNC flange drills and machining centers proved to be reliable value-adding machines in fiberglass (FRP, GRP and GRE) pipe fittings production. Active R&D in the field of machine design and automation, coupled with a study of the flange machining process resulted in a highly productive and user-friendly solution for what used to be a bottle neck in GRP flange manufacturing.

Automatic piece detection feature contributes significantly to machine productivity by reducing operator intervention time, resulting in a 25% productivity increase, as shown by statistical results on actual runs. This is implemented by automatic profile scanning using high accuracy position sensor.

Face and circumferential grinding of flanges are provided, contributing to a further increase in overall plant productivity by completing several operations in a single setup.

YLE flange machining centers are fully automated three-axis systems with a single drilling/milling spindle. The system automatically searches for the flange's center and face in workspace, and then adjusts the machining pattern accordingly by controlling spindle position. These features result in the following:

  Productivity: improvements of 25% over general-purpose CNC based drilling, due to reduction in setup times

  Quality: Auto-compensation of positioning inaccuracies

  Process Robustness: Less demand is placed on upstream cutting process as a result of auto-compensation

  Scheduling: improved production planning, by reducing operator-induced variability caused by manual adjustment procedures

  Human Resource Flexibility: Less operator skills are required

  Productivity data based on actual production results is presented in table below:

DN

ID

BCD

Hole Diameter

Number of Holes

Flange
Thickness

Drilling
Speed

Drilling
Time

Centering
Time

Total
Time

mm

mm

mm

mm

 

mm

mm/min

min

min

min

1600

1600

1820

52

40

200

250

56

4

60

1800

1800

2020

52

44

200

250

61

4

66

2000

2000

2230

52

48

200

250

67

4

72

2200

2200

2440

58

52

200

200

85

5

89

2400

2400

2650

58

56

200

200

91

5

96

2600

2600

2850

58

60

200

200

98

5

102

3000

3000

3290

60

68

200

200

111

5

116

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