Chris Uli - Cnc Machining

Do 3D Printing And CNC Machine Coexist Or Compete?

2021-09-20 Cnc Machining Guide Comments Off on Do 3D Printing And CNC Machine Coexist Or Compete?

Many countries in the world have cultivated 3D printing as a new growth point for future industrial development. As early as 2012, the United States identified “Additive Manufacturing Technology...

The difference between copper rod cutting machine and pipe cutting machine

2021-09-16 Cnc Machining Guide Comments Off on The difference between copper rod cutting machine and pipe cutting machine

In a sense, the copper rod cutting machine is actually one of the pipe cutting machines, but in order to meet the requirements of traveling power and accuracy, a copper rod cutting machine is speciall...

In-mold rotary cutting process for changing continuous drawing die

2021-09-14 MFG Guide Comments Off on In-mold rotary cutting process for changing continuous drawing die

With the rapid development of science and technology, the use of metal stamping parts in various industries has become more and more extensive, and the quality and size requirements of the products ha...

CNC turntable and its positioning accuracy

2021-07-29 MFG Guide Comments Off on CNC turntable and its positioning accuracy

Equipment and maintenance Xenon control wheel platform xenon and its fixed image Qinghai ** Machine Tool Factory (Xining 810018) Yue Mingqiang Servo Motor CNC Turntable (1) 1, 3. Reduction gear 2. Ser...

Application of Group Technology in NC Machining

2021-07-29 Cnc Milling Guide Comments Off on Application of Group Technology in NC Machining

Group technology GT is based on the similarity of things. Wherever similarities exist, the principles of group technology can be applied. At present, group technology has been successfully applied in ...

Numerical control machining of arc cam with large center distance

2021-07-29 MFG Guide Comments Off on Numerical control machining of arc cam with large center distance

Globoidal cams can only be processed through two rotating coordinates and cannot be converted into rectangular coordinates due to their non-expandable space characteristics. Whether it is a special Cn...

CNC machining and CNC system

2021-07-29 MFG Guide Comments Off on CNC machining and CNC system

Cnc Machining shows great advantages in modern production. For modern manufacturing, Cnc Machine tools are very suitable for parts with complex shapes, precision and small batches. However, ordinary o...

Numerical Control Turning Machining and Error Analysis of Skew Ball Roll

2021-07-29 Cnc Turning Guide Comments Off on Numerical Control Turning Machining and Error Analysis of Skew Ball Roll

From a geometric point of view, the skew rolling process is a pair of conjugate curved surfaces with the surface of the rolling piece and the pass surface of the milk roller. Therefore, many experts a...

Five-axis NC Machining Technology of Large X-Type Francis Turbine Blade

2021-07-29 MFG Guide Comments Off on Five-axis NC Machining Technology of Large X-Type Francis Turbine Blade

Turbine runner blades are complex sculptural curved parts. In the manufacturing process of large and medium-sized units, the long-term use of “sand casting-grinding wheel grinding-three-dimensio...

Preliminary research on reconfigurable CNC system based on modularization

2021-07-29 Cnc Machining Guide Comments Off on Preliminary research on reconfigurable CNC system based on modularization

Because Cnc Machine tools have the characteristics of strong adaptability, high machining accuracy, good quality, and high machining efficiency, they have been widely used. CNC technology has also bec...

Aerospace engines are known as the jewel in the crown of modern industry. Their output power is amazing. Aero engines weighing only a few tons can propel passenger planes weighing dozens of tons and hundreds of tons. Generally speaking, the manufacturing cost of aero-engines accounts for about 30% of the total manufacturing cost, and the importance is self-evident. The internal structure of aero-engines is very precise and complex, and the connections between parts should be tightly connected. But when passing by the aircraft engine, a rattling sound can be heard from inside. Could it be that the fan blades inside the engine are loose? That's right, it's loose, but don't be afraid, it was originally designed like this. The aero engine completes the compression and expansion of the gas, and generates powerful power with the highest efficiency. The blade that drives the aircraft forward is a special part with a large number of complex shapes, high requirements, and difficult processing. The curved configuration of aero-engine blades is extremely complex, which transmits considerable torque and extremely high combustion temperature. Therefore, the material of the blade is generally made of high-temperature resistant and high-strength materials. The initial material was a polycrystalline nickel-based superalloy. Later, a polycrystalline blade with oriented grain boundaries was made. The crystalline direction was consistent with the force direction, and the performance was improved a lot. Finally, it developed to the widespread use of titanium alloy materials. Integral blade processing technology. As the load-bearing component of the engine, the blades of these fans are not firmly fixed on the engine, but are stuck in the tongue and groove of the fan disc through the tenon. There is a gap between the tenon and the groove. When the fan rotates slowly, under the action of gravity, each blade will slide toward the axis when it is close to the twelve o'clock position, and when it is close to the six o'clock position, it will move towards The axis slides out in the opposite direction. As a result, the fan blades collided with each other in the process of slashing to and fro, making a rattling sound. The mortise and tenon structure connecting the fan blades and the fan plate is called a "vertical tree" mortise, because it looks like a vertical tree and a fir tree, showing a toothed V-shaped tenon and a groove between the tenon and tenon. The obvious gap can facilitate the free sliding of the tenon within a certain range. Why are aero engine blades designed as loose structures? When the engine fan rotates rapidly and exceeds the critical speed, the rotating shaft begins to approach its geometric center due to its elasticity, and then crosses the geometric center and approaches its imbalance. At this time, the direction of the centrifugal force received by the blade starts from the new rotating shaft and passes through the position of the blade. The component along the tangential direction of the turbine disk points to the opposite direction to the unbalanced position, which makes the blades deviate in this direction, thereby re-adjusting the unbalanced position so that the center of gravity is close to its geometric center, thereby reducing vibration. This process is dynamic, so the vibration of the fan at any high speed can be dynamically reduced, and the angle of the blades relative to the tangential direction of the turbine disk changes periodically, so the blades need to swing left and right. In order to allow the blades to swing freely to a certain extent, the blades are not completely fixed on the turbine disk, but are left with gaps, and the shoulders cannot be completely close to the adjacent blades, which is also to allow the blades to swing. It is certain that not only the blades of the fan are loose, but the blades of the entire compressor are all loose.

Why are aero engine blades designed as loose structures?

2021-07-20 Cnc Machining Guide Comments Off on Why are aero engine blades designed as loose structures?

Aerospace engines are known as the jewel in the crown of modern industry. Their output power is amazing. Aero engines weighing only a few tons can propel passenger planes weighing dozens of tons and h...

Precision hardware machinery parts processing and manufacturing

2021-07-20 Cnc Turning Guide Comments Off on Precision hardware machinery parts processing and manufacturing

Precision machining belongs to the precision machining in mechanical machining. According to the temperature state of the workpiece to be processed, it is divided into cold machining and hot machining...

Ways to improve the processing efficiency of precision parts

2021-07-20 MFG Guide Comments Off on Ways to improve the processing efficiency of precision parts

Earlier, we introduced to you where the main advantages of precision parts processing are reflected. Today https://cncmachining.wiki/ will introduce some methods to improve the efficiency of precision...

Why are the technicians in the five-axis machining factory a bit arrogant?

2021-07-20 MFG Guide Comments Off on Why are the technicians in the five-axis machining factory a bit arrogant?

“The boss’s skills are obviously inferior to me, why did he become my boss?” Technicians in five-axis processing plants often make this kind of trouble. Here are the core points of t...

How to choose the sealing method when machining design?

2021-07-20 Cnc Milling Guide Comments Off on How to choose the sealing method when machining design?

The sealing problem of equipment always exists along with the operation of the equipment. Today, Huiwen Zhizao has specially sorted out the various sealing forms, use ranges and characteristics common...

Author Archives: Chris Uli