cutting speed

cutting speed, precision metal parts feed rate is an important parameter in the CNC machine tool cutting parameters, mainly based on the machining accuracy and surface roughness and the tool, workpiece material properties, select the maximum feed rate, machine tool stiffness and feeding system performance limitations., near the corner of contouring feed rate should be appropriately reduced in order to overcome the inertia or process systems is caused by deformation in the contour around the corner "overtravel" or "under process" phenomenon. to determine the principles of the feed rate : When the workpiece quality requirements can be guaranteed, in order to improve production efficiency, can choose a higher feed rate generally selected in the range of 100 ~ 200mm/min. processing in high-speed steel cutting tools, cutting, machining deep hole or should choose a lower feed rate, generally 20 ~ 50mm/min select range of .3 when machining accuracy, surface roughness, the feed rate should be selected smaller, generally in the 20 ~ 50mm/min range within selected .4 tool air travel, especially long-distance back to zero, you can select the CNC system given the maximum feed rate.

  precision metal parts back to eat the knife amount (or side knife to eat the amount determined under the premise of ensuring the quality of the machined surface, the back of cut (ap) should be determined according to the stiffness of the machine tool, workpiece and tool under the conditions allowed by stiffness, should as much as possible so that the back of cut allowance equal to the workpiece, thus reducing the number of tool path, and increase productivity.

   precision metal partss machining centers with axial and neck power head, to achieve the linkage of the three coordinates. Polar coordinate interpolation instruction and cylindrical interpolation instruction program optimization and development, and the machining station repeated positioning error of the effective compensation, the initial fast and reliable precision milling on the side of the rotary to improve the machining accuracy and surface finish quality.

    

Types Of Commonly Used Tool Of The CNC Milling and Tool Type Selection

Types Of Commonly Used Tool Of The CNC Milling and Tool Type Selection

Precision CNC machining parts NC milling tool types, in order to adapt to high-speed, high efficiency and high degree of automation features of CNC machine tools, the tool is moving in the direction of standardization, universal and modular development, including the milling cutter and hole machining tool. meet the requirements of efficient and specific milling, developed for a variety of special purpose tool. There are many ways to the classification of the CNC milling tool tool structure can be divided into: (1) the overall style, ② mosaic, welding or machine clip connection, the clamp can be divided into translocation and indexable two ③ special type, such as composite tool, damping tool manufacturing tool materials can be divided into: (1) high-speed steel cutting tools, ② carbide cutting tools, (3) diamond tool, ④ other materials, cutting tools, such as cubic boron nitride cutting tools, ceramic cutting tools. from the cutting process can be divided into: flat end milling cutter, rounded end mills, ball end cutter and taper milling knives.

Machining Centers, Tool Type Selection

Precision CNC machining partsTool selection in CNC programming state of human-computer interaction should be based on the processing capacity of the machine tool, workpiece material properties, processing procedures, cutting parameters and other relevant factors, the correct selection of the tool and tool holder, tool selection The general principle is : easy to install, good rigidity, durability and high precision to meet the processing requirements under the premise, as we choose a shorter shank in order to improve the rigidity of tooling production, processing parts of the geometry is to select the tool type the main basis.

Precision CNC machining parts A milling cutter selection of machining curved parts, in order to ensure that cutting edge and contour is tangent to the cutting point, to avoid the blade and the workpiece contour interference, generally use the ball head knife, rough two-edged cutter, semi- finishing and finishing with four-blade cutter, milling the larger plane, generally use the blade inlaid disc cutter, milling flat or stepped surface in order to increase productivity and improve the surface roughness, generally universal cutter milling keyway, in order to ensure the dimensional accuracy of the slot, usually two-edged keyway cutter, posted on Free paper Download Center http://eng.hi138.com

2. hole machining tool selection. hole machining of CNC machine tools in general no drill mode, due to poor rigidity of the drill and cutting conditions, the selection of the drill diameter D should satisfy L / D ≤ 5 (L conditions for the drilling depth, the drill center drill before positioning to ensure the accuracy of the positioning of the hole processing, fine twist the choice of floating reamer reaming orifice want to chamfer, boring should try to use a symmetrical edge boring head, cutting, cut vibration to balance the boring; try to choose a thicker and shorter shank in order to reduce cutting vibration. economic type CNC machining, tool sharpening, measurement and replacement of more than manually, taking up the auxiliary long time, therefore, must be reasonable to arrange the order of the tool in general should follow the following principles: (1) to minimize tool quantity, ② a tool clamping to complete all processing site ③ rough finishing tool should be used separately, even if it is the same dimensions of the tool, ④ The first milling drill, ⑤ the first surface finished, two-dimensional contour finishing, (6) possible, as far as possible use of CNC machine tools, automatic tool changer, in order to improve production efficiency In addition, the durability and accuracy of the tool and the tool price relationships requires attention, in most cases, choose a good tool, although the increase in the cost of the tool, processing quality and the resulting efficiency can greatly reduce the overall processing costs. In short, according to heat treatment condition of the workpiece material, cutting performance, and allowance to choose good rigidity, high durability cutter is to give full play to the CNC milling machine production efficiency and access to the premise of a satisfactory quality of processing. 

   

On the application of precision milling technology in the processing center

On the application of precision milling technology in the processing center

Precision CNC machining parts  machinery manufacturing industry plays a very important position in the national economy as a whole, including metal cutting, basic and reliable precision machining means during the process of NC programming, tool selection and cutting the amount of very important, it is not only a huge effect on the quality of the parts to be processed, and can even determine the machine the efficacy of play and production safety is carried out smoothly in the preparation of the processing procedures, tool and cutting, the preparation of high-quality processing program premise.

Precision CNC machining parts  Machinery manufacturing industry plays a very important position in the national economy as a whole, precision metal cutting, basic and reliable means of processing, mechanical, electrical, electronic and other modern industrial sector plays an important role. Tools design, manufacture and use since ancient times is highly valued, here we are talking about tools, not only refers to the machine tool for machining, we are more concerned with the cutting tool. tool to promote the development of metal cutting technology. an extremely active and very critical factor, it can be said machining technology development, innovation, history is the history of tool development.

Precision CNC machining parts  introduced in 2008, the Little Giant company produced two milling machining center, but has not been able to truly part and universal CNC turning and milling machining center milling functions. Tool selection, machining path planning, cutting the amount of set programmers just set the parameters, you can automatically generate the NC program and transferred to the CNC machine tools to complete the processing, CNC machining, tool selection and cutting to determine the state of human-computer interaction, which is common machining stark contrast, it also requires the programmer must master the basic principles of tool selection and cutting to fully consider the characteristics of CNC machining, programming, study and master the CNC milling machining center, milling functions for complex shape, and accuracy require high precision machining of rotary part, to upgrade my unit of CNC precision machining capabilities, with a very important practical significance.