As gear tool technology continues to advance, gear cutting machines that use these tools are constantly changing. Hartmuth Müller, chief technology officer at Klingelnberg GmbH, points out that the challenge of designing a bevel gear dry cutting machine is more challenging than designing a tool. He proposed four strategic design points for the development of new gear machines: Previous Next
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(1) Optimize the chip flow when quickly cutting large and thick chips;
(2) Cancel the hydraulic unit to simplify the maintenance problem;
(3) Create smaller machine step sizes for better integration with the workpiece automatic handling device;
(4) Includes automatic deburring (no separate installation and station for deburring).
Müller advocates the layout of machine tools with vertical spindles instead of horizontal spindles. The vertical spindle design allows the chips to flow naturally downwards, leaving the cutting head and entering the chip conveyor through a specially designed ramp. Klingenberg's new C29 and C50 gear hobbing machines feature a vertical spindle design. The C29 has a maximum gear diameter of 290mm for machinable machining and 500mm for C50.
According to Müller, the vertical spindle design allows for smaller step sizes and uses gravity to hold the workpiece in a gripped state. Smaller steps are easier to match with the workpiece automatic handling device; gravity means that the loading device does not need to push the workpiece into the fixture when the workpiece is clamped. In addition, electromechanical clamps are used instead of hydraulic clamps. The step size of the C50 hobbing machine is about half that of the Klingenberg C60 hobbing machine. Pneumatic manipulators drive workpieces up to 100 kg into and out of the cutting head, providing a clear path of motion through the cutting head.
Klingenberger claims that the integrated application of workpiece clamping and high-speed deburring on the C50 hobbing machine reduces the nominal clamping time of each workpiece from 3 to 5 minutes to approximately 15 to 18 seconds. The workpiece clamping time of the C29 hobbing machine is 8 seconds.
Gleason has also developed its own new gear cutting machine. The machine has a higher processing flexibility and can machine different types of gear workpieces on the same machine. Hermann J. Stadtfeld, vice president of bevel gear technology at Gleason, commented in an article published in January 2007: "There are still quite high machining requirements for straight bevel gears. However, they have not been developed in the past. A CNC-type gear cutting machine that meets today's machining requirements. Straight bevel gear manufacturers rely mainly on modified mechanical machine tools. According to Stadtfeld, straight bevel gears are often used to adjust the product range. Small batch processing is carried out in different types of machine tools in the workshop. If these workshops need to process spiral bevel gears in addition to the straight bevel gears, you can invest in a new machine tool and use as many machine tools as possible to complete as many potential machining tasks as possible.
a) Sensor stays away from mechanical vibration source, for example, pump. Use flexible pipe to connect meter with pipeline if inevitable. The housing of meter must be standalone, out of touch with any other device. There must be 3 times the size of sensor between 2 sensors if there are many flow meters on the same pipeline, to avoid resonance.
b) Do not install sensor on pipeline that easily expands with hot and contracts with cold, especially near expansion joint, which leads to a worse stability.
c) Sensor stays away from industrial electromagnetic field, such as large generator and transformer, better 5m at least. Such device influences the performance of drive coil and pickoffs. Make sure magnetic field intensity less than 400A/m.
d) Sensor shall be installed on lower pipeline, to be easily full of fluid.
e) Make sure Ex-mark meet application requirements if in hazardous area.
f) Build a sunshade if the meter is under direct solar radiation. g) Keep the meter from corrosive liquid.