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On October 15, the 12th Beijing International Construction Machinery, Building Materials Machinery and Mining Machinery Exhibition and Technology Exchange Conference was held in the Beijing International Exhibition and Convention Center. The CNHTC Engine Sales Department brought a full range of construction machinery engines to the debut. Unlike other power exhibitors, the engines exhibited by CNHTC’s engine sales department are highlighted by energy saving and environmental protection. The...
The machining of the crankshaft connecting rod journal is one of the key processes in crankshaft machining. In the past, the tool for machining the third and fourth connecting rod journals of the crankshaft designed by our factory can only process one type of crankshaft. Not only the economic benefits are poor, but also the production cycle is long. At the same time, because the fixtures are cumbersome, it takes time and effort to replace the tooling, and it is easy to damage the equipment. To...
Imported internal grinder operation need to pay attention to several points: 1, imported internal grinder must comply with the safe operation of mechanical cutting procedures. 2, the workpiece before processing, should be based on the workpiece material, hardness, precision, rough grinding and so on, a reasonable choice of the appropriate wheel. 3, change the wheel, according to the safety of grinding wheel operating procedures. You must carefully check the wheel size and line speed meets the...
In this technical exchange, we selected some of the works that won the prize in the “Second SINUMERIK Numerical Control Application and Transformation Awards Essay”. They are the first prize “Selecting SIEMENS840D CNC System to Transform CNC Gantry Machining Center”, II The award "SINUMERIK802D numerical control system in the transformation of SKIQ16CNB CNC vertical turning center", "Application of SIEMENS840D system in the transformation of NAXOS large-scale grinding...
The working principle is to use the temperature of the alloy can easily melt open to control the use of gravity and the role of the spring mechanism to close the valve. When a fire occurs, the flame invades the air duct and the high temperature melts the fusible alloy on the valve or causes the deformation of the memory alloy to automatically close the valve for occasions where the air duct and the fire protection zone are penetrated. Fire damper installed in the exhaust pipe exhaust valve,...
Figure 5-30 shows a typical bushing part. The part is made of 45 steel. There is no heat treatment and hardness requirement. The part is subjected to CNC turning technology analysis (single piece and small batch production). First, the part drawing process analysis The surface of the part is composed of inner and outer cylindrical surface, inner conical surface, smooth arc, reverse arc and external thread, and many of the diameter and axial dimensions have higher dimensional accuracy and...
Magnetic flap level gauge the correct use and maintenance methods: Magnetic flap level gauge from the body, the flip box (composed of small red and white magnetic flap), float, flange cover and other components for all types Liquid level measurement of the container. Magnetic flap level gauge can be used for high temperature, explosion-proof, anti-corrosion, food and beverage and other occasions, as a liquid level display or remote display and remote control. UHZ series magnetic flap level...
(3) Analysis of axial feed distance during threading (4) Analysis of the route of the grooving When a rectangular groove with a low turning accuracy and a narrow width is used, a grooving knife having a blade width equal to the groove width can be used to feed the vehicle in one straight direction by the straight forward method. The groove with higher precision is generally used for secondary feed, that is, when the first time the groove is fed, the remaining amount of the car is left on both...
Atmospheric water ring pump is a pump products, in many industries have a very wide range of applications, but we all know? In fact, the atmosphere water pump is a series of atmospheric ejector water ring pump unit, water pump in front of the main reason for the series pump is to raise the ultimate vacuum, and to expand the use of the pump. Compared with other types of mechanical vacuum pumps, water ring vacuum pump has many advantages, including simple and compact structure, manufacturing...
Commonly used route for machining parts on CNC lathes: (1) Analysis of the path of the arc of the car In the actual car arc, it is necessary to process multiple knives, first cut off most of the margin, and finally drive out the required arc. The following describes the machining routes commonly used for car arcs. Figure 1 shows the step path of the arc of the car. Figure 2 (a) shows the concentric arc path of the arc of the car. Figure 3 shows the car cone cutting route of the car arc That is...
(2) Process analysis of parts drawing The analysis and research of the part drawing is mainly to carry out the process review of the parts, such as checking the view of the design drawings, dimensioning, technical requirements, errors, omissions, especially for parts with poor structural craftsmanship, if possible and design. The personnel communicate or propose amendments, and the designer decides whether to make the necessary modifications and improvements. 1 Analysis of the integrity and...
The numerical control machining process analysis of the parts is the most important and extremely complicated part of the NC program, and it is also the core work of the CNC machining process design. It must be completed before the NC machining plan is formulated. A qualified programmer must have a clear and comprehensive understanding of the functions and features of CNC machine tools and their control systems, as well as every aspect that affects CNC machining, in order to avoid product...
After the improvement, a large pad is added under the original fixture, and the large pad is integrated with the pad, the cylindrical positioning pin and the chamfered positioning pin in the original fixture. In order to ensure the accuracy, the machining center is used for careful processing. The key guarantees two points: 1 large pad edge and parallel to the center line of the two cylinders, the parallelism error is not more than 0.015mm. In this way, when the fixture is being corrected, it...
The advanced numerical control system is the key factor to ensure the high-speed machining quality and efficiency of the complex curved surface of the mold. Its characteristics are reflected in the addition and subtraction of pre-compensation, feedforward control, accurate vector compensation, optimal corner deceleration, safety protection and real-time monitoring. The basic requirements for high-speed machining of molds for CNC systems are: High-speed digital control loop, such as 64-bit...
The problem of eccentric holes on the end faces of rotary parts is often encountered in production, and the usual method is to process them on a horizontal machining center. Parts with longer lengths are rotated by the table. The coaxiality of the eccentricity at both ends depends on the indexing accuracy of the table. For parts with shorter lengths, the manual rocking table is often used for indexing, and the eccentricity at both ends is the same. The degree of axiality is largely determined...
CNC machine tools are the key equipment of modern manufacturing. The output and technical level of a national CNC machine tool represent the manufacturing level and competitiveness of the country to some extent. So far, the technical level, performance and quality of CNC machine tools in China are still far from those in foreign countries. Simple CNC lathes with low technical content still dominate. High-end CNC machine tools and functional components mostly rely on imports. Therefore, although...
2. Runner processing Main parts processing points: The water bucket is the key part of the runner. The bucket shape and the tail and tail of the bucket must be processed and repaired in strict accordance with the airfoil requirements. The final effect of the processing will be directly related to the mechanical strength and hydraulic power of the runner. Performance, affecting unit output and rotor erosion. The focus of this process will focus on the overall processing of the rotary water...
Our company is a professional manufacturer of auto parts. The main products are mostly shafts, large batches and varieties (as shown in Figure 1). The product supply schedule is urgent and the product quality requirements are strict. In order to meet the market requirements, in the machining process, CNC lathes are used for processing. In the past production, the traditional operation method is to first face the knife with B, input the Z-direction tool to complement the value, cycle start to...
Part structure With the wide application of CNC machining technology, the complexity of the part structure is constantly improving. In some parts processing, positioning and clamping are very difficult, and it is not suitable for multiple positioning and clamping. The whole machining one-time forming technology is to rotate and turn the worktable according to the angle on the horizontal or vertical horizontal conversion machining center machine, and to process all the faces and holes of the...
In mechanical products, there are many disc parts that need to be drilled. Originally, we used the scribing method to drill holes, but the processing efficiency was low and the pitch deviation was large. To this end, we have also designed some simple special drilling molds. The result is a large number of drilling molds and increased product costs. Seeing the above problem, we designed a universal adjustable drill mold as shown. The drill mold consists of a drill body (indexing part), three-jaw...
1 Introduction With the development of the modern machinery industry, computer-aided design (CAD) and computer-aided manufacturing (CAM) have shown great potential and are widely used in product design and mechanical manufacturing. The NC program code generated by CAD/CAM system can be used. Instead of traditional manual programming, CAD/CAM is used to design and manufacture parts, which enables enterprises to improve design quality, shorten production cycle and reduce product cost, thus...
Chinese construction machinery companies that have grown up in the rapid construction of China for decades have now become full-fledged and are increasingly looking to the world. With the beginning of the Chinese Year of the Dragon, Chinese construction machinery companies have gone out of the sea and launched a sweeping operation against the global engineering machinery giant. The foreign masters who used to stand up in the high mountains in China, under the influence of many factors such as...
CNC gantry machining center can be used to process metal materials with high hardness and mold parts of various shapes. In the process of CNC gantry machining center, these problems often occur: 1. After the machining of the workpiece, there will be traces of electrode splicing. 2. The hole wall will burn or crack. 3. The surface of the workpiece processed by the CNC gantry machining center is rough. 4. The size does not meet the processing requirements. For other gantry machining center...
The leakage of the bed of the tungsten steel CNC gantry machining center is mostly liquid leakage, and the leakage refers to the liquid flow leakage inside the equipment, which is deployed to the external equipment. 1. Destructive leakage Due to the sudden deterioration of the use conditions, the rapid wear of the sealing parts of the tungsten steel gantry machining center, or the high temperature carbonization, deformation and failure, leading to the failure of the performance of the sealing...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.