scholarly journals Design and Research of Grinder Cooling Device Used for Mechanical Numerical Control Machining

CONVERTER ◽  
2021 ◽  
pp. 144-151
Author(s):  
Yan Cheng
Keyword(s):  
Design Method ◽  
Numerical Control ◽  
Cooling Device ◽  
Machined Surface ◽  
Numerical Control Machining ◽  
Production Practice ◽  
Metal Chips ◽  
Working Principle ◽  
Specific Implementation ◽  
Technical Solutions

This paper introduces design method and working principle of grinder cooling device for mechanical numerical control machining. By analyzing the problems of grinder cooling in mechanical numerical control machining, technical solutions for the problems, model construction and specific implementation pattern are proposed. Compared with the traditional cooling device, this device is simple to use, uniform in cooling, and has better coolant cooling effect. While cooling, it removes a part of metal chips and impurities, avoidingadverse effect on accuracy of the machined surface, whichprovides important guidance for production practice.

Adaptive spiral tool path generation for computer numerical control machining using point cloud

2021 ◽  
pp. 095440622199007
Author(s):  
Mandeep Dhanda ◽  
Aman Kukreja ◽  
SS Pande
Keyword(s):  
Tool Path ◽  
Cnc Machining ◽  
Numerical Control ◽  
Numerical Control Machining ◽  
Form Errors ◽  
Spiral Tool Path ◽  
Novel Method ◽  
Mesh Grid ◽  
Cloud Of Points ◽  
Cam Software

This paper reports a novel method to generate adaptive spiral tool path for the CNC machining of complex sculptured surface represented in the form of cloud of points without the need for surface fitting. The algorithm initially uses uniform 2 D circular mesh-grid to compute the cutter location (CL) points by applying the tool inverse offset method (IOM). These CL points are refined adaptively till the surface form errors converge below the prescribed tolerance limits in both circumferential and radial directions. They are further refined to eliminate the redundancy in machining and generate optimum region wise tool path to minimize the tool lifts. The NC part programs generated by our algorithm were widely tested for different case studies using the commercial CNC simulator as well as by the actual machining trial. Finally, a comparative study was done between our developed system and the commercial CAM software. The results showed that our system is more efficient and robust in terms of the obtained surface quality, productivity, and memory requirement.

Numerical Control Machining of Scroll with Variable Thickness

2014 ◽  
Vol 490-491 ◽  
pp. 288-293
Author(s):  
Tao Liu ◽  
Xia Qin Wang ◽  
Jun Wu ◽  
Yong Wei Wang
Keyword(s):  
Variable Thickness ◽  
Processing Method ◽  
Numerical Control ◽  
Scroll Compressor ◽  
Numerical Control Machining ◽  
Cad Cam ◽  
Programming Process ◽  
Center Track ◽  
Fitting Error ◽  
Cam Software

With the development of scroll technology, the requirements of more efficient and more accurate processing method for scroll compressor parts become more urgent. This paper proposes a method to improve the machining effect of scroll compressor. The approach is based on 3-point arc approximation method which divides combined profile of scroll wrap into subparagraph arcs that can be interpolated on CNC System. This approach simplifies the programming process and improves the curve fitting effect. The results indicate that the fitting error is in the predetermined range, and the interpolation points of cutter center track are significantly less than those based on CAD/CAM software. The method presented in this paper is of significance to the NC machining of novel precise scroll profile.

Parallel acceleration/deceleration feedrate scheduling for computer numerical control machine tools based on bi-directional scanning technique

2017 ◽  
Vol 233 (3) ◽  
pp. 937-947 ◽  
Author(s):  
Jie Huang ◽  
Xu Du ◽  
Li-Min Zhu
Keyword(s):  
Computer Numerical Control ◽  
Numerical Control ◽  
Processing Unit ◽  
Numerical Control Machining ◽  
Computational Burden ◽  
Central Processing ◽  
Scanning Process ◽  
Scanning Technique ◽  
Feedrate Scheduling ◽  
Parallel Acceleration

The acceleration/deceleration feedrate scheduling is one of the most important techniques in computer numerical control systems. Along with this technique, the bi-directional scanning technique is always employed. The bi-directional scanning technique consists of a backward scanning process followed by a forward scanning process. The two scanning processes in the conventional methods are executed in a serial manner by scanning through all the scheduling blocks one by one. Consequently, the feedrate scheduling will suffer from a heavy computational burden when there are massive blocks to be scanned, which deteriorates its real-time performance for computer numerical control machining. To alleviate the computational burden, a parallel acceleration/deceleration feedrate scheduling approach is proposed in this article. With this method, the scheduling blocks are splitted into several scheduling units and the feedrate for each of them is scheduled simultaneously. The feasibility of the proposed approach is validated through the feedrate scheduling for two widely used butterfly and helix paths. For a constructed example of feedrate scheduling, a significant acceleration ratio about 3.7 on a personal computer with a quad-core central processing unit is achieved.

Sign in / Sign up

Export Citation Format

Share Document