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A preliminary analysis of the machining errors and their causes in CNC machine tools
Release Time:
2019-08-27
I. CNC Machine Tools
1. Machining errors caused by CNC machine tool itself: control system errors; machine tool feed drive system errors
2. Machining errors caused by manufacturing process: unreasonable processing process arrangement; improper selection of tool entry and exit points
3. Errors caused by workpiece positioning
4. Errors caused by unreasonable program compilation
II. High-precision CNC Machine Tools
1. The outer circle turned out by a high-precision CNC lathe is conical: the connecting line of the front and rear centers is not coaxial with the main axis, which is caused by the incorrect position of the tailstock center of the CNC lathe.
2. Vibration of the workpiece during CNC machining: This may be due to the tailstock sleeve extending too long or the workpiece support being too loose, or the cutting tool not being sharp enough or the nose radius being too large, or the bearing clearance of the rotating center being large or the clearance of the small and medium slides being too large.
3. Circular runout does not meet the requirements: The front center is no longer coaxial with the main axis or the circular runout caused by the wear of the rotating center bearing, the workpiece center hole is not wiped clean or the center hole is scratched, and the lever of the heart-shaped chuck hits the end face of the chuck, so that the center hole does not work.
4. Serious wear or scratching of the center hole of the high-precision CNC lathe: This may be caused by the use of a fixed center without lubrication or the main shaft speed being too high, or the heart-shaped chuck not being clamped tightly, and the workpiece stopping rotating during turning.
The sources of errors in machining parts using CNC machine tools are very complex. Only by reasonably mastering the principles of CNC machine tools and strengthening the process knowledge of operators can we effectively solve the machining error problems of CNC machine tools, improve the precision of CNC machining, and thus produce qualified products.
Article link: China Machine Tool Business Network http://www.jc35.com/news/detail/56950.html
Focus on Hotspots
Yangzhou Lichuang Machine Tool Co., Ltd. (the bidder) is publicly tendering for electrical components used in its products (general-purpose machine tools and CNC machine tools). Qualified bidders are invited to participate in the bidding.
Public disclosure form for enterprise environmental information of "Shuangyou" enterprises
The company's main products include MC-H series horizontal machining centers, XH71 (VMC) series vertical machining centers, MC-VH series vertical and horizontal machining centers, CK series CNC lathes, C62 series horizontal lathes, Z50 series vertical drilling machines, etc. Many of these products have been recognized as Jiangsu Province High-Tech Products.
Corporate Environmental Information Disclosure Form
The company's main products include MC-H series horizontal machining centers, XH71 (VMC) series vertical machining centers, MC-VH series vertical and horizontal machining centers, CK series CNC lathes, C62 series horizontal lathes, Z50 series vertical drilling machines, etc. Many of these products have been recognized as Jiangsu Province High-Tech Products.
VMC Manufacturer: What are the environmental requirements for a vertical machining center?
A vertical machining center is a high-precision device whose accuracy is closely related to the external environment. Let me tell you about the environmental requirements for a vertical machining center:
Vertical Machining Center Supplier: What is the working principle of a vertical machining center?
A vertical machining center refers to a machining center with a vertical spindle; its structure is mainly a fixed column. The worktable is rectangular and does not have indexing or rotating functions. It is suitable for processing discs, sleeves, and plates. It typically has three linear movements. A coordinate axis and a rotary table that rotates along the horizontal axis can be installed on the worktable to process spiral parts. The working principle of a vertical machining center is introduced below:
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