Leisure Bags,Leisure Suitcase,Leisure Backpack,Leisure Garment Bag Jinan Golden Bull Canvas Textiles Co.,LTd , https://www.jgbct.com six. Q: How to monitor and adjust during the machining process?
After the workpiece is aligned and the program is commissioned, it can enter the automatic machining stage. During the automatic machining process, the operator monitors the cutting process to prevent workpiece quality problems and other accidents caused by abnormal cutting.
The following aspects are mainly considered for monitoring the cutting process:
1. Machining Process Monitoring Roughing primarily considers the rapid removal of excess allowance on the surface of the workpiece. During the automatic machining of the machine tool, the tool automatically cuts according to the predetermined cutting path according to the set cutting amount. At this time, the operator should pay attention to observe the change of the cutting load during the automatic machining process through the cutting load table, adjust the cutting amount according to the bearing capacity of the tool, and maximize the efficiency of the machine tool.
2. Monitoring of cutting sound during cutting In the automatic cutting process, when the cutting is started, the sound of the cutting workpiece is stable, continuous and brisk, and the movement of the machine is stable. As the cutting process progresses, the cutting process becomes unstable when there are hard spots on the workpiece or tool wear or tool feeding. The unstable performance is that the cutting sound changes, and the tool and the workpiece will collide with each other. Sound, the machine will vibrate. At this time, the cutting amount and cutting conditions should be adjusted in time. When the adjustment effect is not obvious, the machine should be suspended and the condition of the tool and workpiece should be checked.
3. The finishing process monitors the finishing, mainly to ensure the machining size and surface quality of the workpiece, the cutting speed is high, and the feed rate is large. At this time, attention should be paid to the influence of the built-up edge on the machined surface. For the cavity machining, it should also pay attention to the machining of the cut and the knife at the corner. For the solution of the above problems, one should pay attention to adjust the spray position of the cutting fluid, so that the machining surface is always in the optimal cooling condition; the second is to observe the quality of the machined surface of the workpiece, by adjusting the amount of cutting, avoid as much as possible Changes in quality. If the adjustment still has no obvious effect, it should be reasonable to stop the inspection of the original program.
It is important to note that when you pause or stop the inspection, pay attention to the position of the tool. If the tool stops during the cutting process, a sudden spindle stop will cause a tool mark on the surface of the workpiece. Generally, stop the machine when the tool leaves the cutting state.
4. The quality of the tool monitoring tool determines the quality of the workpiece. In the automatic machining and cutting process, it is necessary to judge the normal wear condition and abnormal damage of the tool through sound monitoring, cutting time control, pause check during cutting, and surface analysis of the workpiece. According to the processing requirements, the tools should be processed in time to prevent the processing quality problems caused by the tools not being processed in time.
Seven. Q: How to choose a reasonable machining tool? What are the major factors in the amount of cutting? Are there tools for several materials? How to determine the tool speed, cutting speed, cutting width?
1. Non-reground carbide end mills or end mills should be used for face milling. Generally, when milling, try to use secondary cutting. The first pass is preferably rough milling with end mill and continuous cutting along the surface of the workpiece. The width of each pass is recommended to be 60% - 75% of the tool diameter.
2. End mills and end mills with carbide inserts are mainly used for machining bosses, grooves and box faces.
3. Ball knives and round knives (also known as round nose knives) are often used to machine curved surfaces and beveled contours. Ball knives are mostly used for semi-finishing and finishing. Round knives with carbide tools are often used for roughing.
8. Q: What is the role of the processing program list? What should be included in the processing program list?
Answer: (1) The processing program list is one of the contents of the NC machining process design. It is also a procedure that requires the operator to abide by and execute. It is a specific description of the machining program. The purpose is to let the operator clarify the content, clamping and positioning method of the program. The tools selected for each machining program should be noted for problems.
(2) In the processing program list, it should include: drawing and programming file name, workpiece name, clamping sketch, program name, tool used in each program, maximum depth of cutting, processing properties (such as roughing or finishing) ), theoretical processing time, etc.
Nine, Q: What preparations should be made before NC programming?
A: After determining the processing technology, it is necessary to understand before programming: 1. The method of workpiece clamping; 2. The size of the workpiece blank ---- to determine the processing range or whether it needs multiple clamping; 3. The material of the workpiece - --- In order to choose which tool to use for machining; 4, which tools are in stock----avoid to modify the program during machining without this tool, if you must use this tool, you can prepare in advance.
X. Q: What are the principles for setting the safety height in programming?
A: The principle of setting the safety height: generally higher than the highest point of the island. Or set the programming zero point to the highest surface, so as to avoid the danger of collision.
XI. Q: After the tool path is compiled, why should I post-process it?
A: Because different machine tools can recognize the address code and NC program format, it is necessary to select the correct post-processing format for the machine to be used to ensure that the programmed program can run.
X. Q: What is DNC communication?
Answer: The mode of program transfer can be divided into CNC and DNC. The CNC refers to the program being transported to the memory of the machine tool through media medium (such as floppy disk, tape reader, communication line, etc.), and the program is called from the memory during processing. To process. Since the capacity of the memory is limited by the size, when the program is large, the DNC method can be used for processing. Since the machine tool directly reads the program from the control computer during the DNC processing (that is, it is done while sending), it is not subject to the memory capacity. Subject to size.
There are three main factors in the amount of cutting: depth of cut, spindle speed and feed rate.
The general principle of choice for cutting usage is:
Less cutting, fast feed (ie small depth of cut, fast feed rate)
According to the material classification, the tools are generally divided into ordinary hard white steel knives (materials are high-speed steel), coated tools (such as titanium plating), alloy tools (such as tungsten steel, boron nitride tools, etc.).
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