Ultra-low speed, high torque and smooth rotation have always been a big problem in motor drive technology. Therefore, a mechanical reducer of various configurations is necessary. However, with the rapid development of power electronics and microelectronics, especially DSPO (Digital Signal Processor) chips and permanent magnet materials, this big problem has been broken. Recently, ETEL of Switzerland and KOLLMORGEN of the United States have launched "BrushlessRingTorqueMotor". ETEL has provided a large telescope with a diameter of 2.5m and a thickness of only 40mm and a torque of 10000Nm. Ring torque servo motor. Under the condition that the turning speed is less than 1 rev / 56 days, it is still incredible to rotate extremely smoothly and evenly. The company also applied a toroidal torque servo motor with diameters of 0.5m and 1m to replace the worm gear pair on the multi-axis linkage milling machine used in the aerospace industry. The machining accuracy and surface roughness were greatly improved. Currently, both companies offer a range of ring torque servo motors in size and size. Taking ETEL as an example, the available motor outer diameter range is from 120mm to 1260mm, torque from 1Nm to 18000Nm, positioning accuracy up to 0.5′′, repeatability up to 0.01′′, minimum speed up to 0.001r/min. In the near future, the worm gears in the A and C (B) axis servo drives of the composite turret and composite spindle head will be replaced by these ring servo torque motors. The worm gear pair and the spiral bevel gear pair will gradually withdraw from the field of CNC machine tools after the spur gear pair. This will be another breakthrough change. 

In order to meet the increasing popularity of five-axis linkage processing, TRI-TECH of the United States now sells the functional parts of the composite spindle head (model 5411). Therefore, any existing three-axis linkage machine can be changed into a five-axis linkage machine (using a 7:24 taper shank and the connector provided by the company, the composite spindle head can be coupled with the spindle of the existing machine tool), and its C axis The range is 360°; the A(B) axis is ±90°, the angular accuracy is 0.01°, and the repeatability is 0.005°. Naturally, the existing machine tool must have a five-axis linkage function CNC system and five-axis linkage programming software. In addition, the company also offers five-axis post-processing software.

At the CINCINNATI booth of IMTS2000, the Z3 composite spindle head designed and manufactured by DST of Germany was exhibited. The head uses a three-bar mechanism in parallel and in series. Due to the limitation of the parallel mechanism, the Z3 spindle head has a maximum inclination of only ±40°, so it can only be used for five-axis linkage, but not for five-sided machining. 

In the past, in the case of five-sided machining of large parts, a two-column (gantry) machine tool and a replaceable vertical and horizontal spindle head (accessory head) were used. To this end, in addition to the tool magazine, this type of machine tool also needs a spindle head library. The beam is generally extended to the left side as a spindle ram for the spindle head. The five-face machining machine exhibited by Japan's New Japan Machine in the last IMTS is such a structure. In this exhibition, the method of exchanging the spindle head is no longer used, and the aforementioned composite spindle head is used. When the A (B) axis is locked at the 0° position, the horizontal plane of the workpiece can be machined. When the C-axis lock is locked at four 90° positions and the A (B) axis is locked at 90°, four mutuals can be realized. Vertical plane machining. Even with one such composite spindle head, 5-sided machining can be achieved. Since the C-axis can be locked at any angle, it is practical to implement more than four but more or less than four vertical planes. In addition, it has been mentioned above that the composite spindle head can also realize the shaft linkage machining, which makes the five-sided and five-axis machining can be realized on the same machine tool, and thus is another form of composite machining. This is advantageous for the processing of large molds. This type of machine also enables the machining of inclined faces and inverted taper holes (ie, the big head is down). Coincidentally, in this session of IMTS, in addition to the new Japanese machine, there are a number of companies exhibiting similar machine tools, the name is called "5-axis and multi-face machining" (5-axisand multimachining) machine tool, which is no longer called "five-sided machining" "The machine is out. 

CNC machining to improve the network productivity of machine tools

It is not new to connect the CNC system to the Internet. However, in the past, the Internet was understood to transmit processing programs to the CNC system, especially large-capacity programs, to enable remote diagnosis and remote maintenance services. On the IMTS2000, the "ITplaza" (Information Technology Plaza, hereinafter referred to as "IT Plaza") exhibited by Okuma Machine Tool Co., Ltd., and the "CyberProductionCenter" exhibited by Mazak Corporation of Japan (Intelligent Production Control Center, below) Referred to as "CPC"), SEIKIFlexLink (soft machine flexible joint) exhibited by Hitachi Seiki Co., Ltd., "OpenFactoryCNC" (open factory CNC) exhibited by the United States Hardinge Machine Tool Co., Ltd. and GEFanuc two exhibition stands, and "Simens company advocated" OpenManufacturingEnvironmert (open manufacturing environment) and other emphasis on networking is to further increase machine productivity. Daxie said that only good machine tools and good CNC systems are not enough to adapt to the current fierce market competition. Only by "entering" their "IT Plaza" can they win in the competition. Mazak said that in the case of multiple varieties and small batches, a CNC machine actually only has 25% of the time cutting, creating value, while the remaining 75% of the time does not create value. They believe that only by networking machines and connecting with their CPCs, it is possible to increase the cutting time from 25% to 65%. Simens said that to maximize the utilization of the machine, the HMI in its CNC system is required. The Ethernet interface card is installed in the machine interface and is connected to the factory intelligent network.

Previous Next

Non-standard Custom Bolts

Non-standard screws refer to screws that are not manufactured according to the unified industrial standards and specifications issued by the state, but are designed and manufactured according to their own needs. The specification of non-standard Screw is not within the national standard, and its appearance or performance is not within the national equipment product catalog. It is a special size, and is generally used for the application of less parts.

Non-Standard Custom Bolts,Non Standard Custom Bolts,Non-Standard Customized Bolt,Non Standard Customized Bolt

Jiangsu Jiajie Special Screw Co., Ltd , https://www1.jiajiescrewcompany.com