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  • Pin shaft commonly used materials
    Jan 08, 2020

    Pin shaft commonly used materials

    pin shafts are a type of standardized fasteners that can be fixedly connected statically or moved relative to the connected part. They are mainly used at the hinge of two parts to form a hinge connection. The pin shaft is usually locked with a split pin shaft, which is reliable and easy to disassemble. The international standard for pin shafts is ISO 2341: 1986. Chinese standard GB / T882-2008 . Common materials C45(1.0503) The GB / T699-1999 standard stipulates that the 45 steel has a tensile strength of 600 MPa, a yield strength of 355 MPa, an elongation of 16%, a section shrinkage of 40%, and an impact energy of 39. C45 steel is a common material for shaft parts. It is cheap and can be obtained after quenching and tempering (or normalizing). It can also obtain comprehensive mechanical properties such as high strength and toughness. The surface hardness after quenching can be Up to 45 ~ 52HRC. 40Cr and other alloy structural steels are suitable for medium-precision and high-speed shaft parts. After tempering and quenching, this type of steel has good comprehensive mechanical properties. motor shaft extension coupler. C45 steel (DIN EN C45 / JIS S45C / ASTM 1045) is widely used in machinery manufacturing, and its mechanical properties are very good. But this is a medium carbon steel, the quenching performance is not good, 45 steel can be hardened to HRC42 ~ 46. Therefore, if the surface hardness is required, and the superior mechanical properties of 45 # steel are desired, the surface of 45 # steel is often quenched (high-frequency quenching or direct quenching), so that the required surface hardness can be obtained.   2, 40Cr 40Cr is a commonly used material for shaft parts. It is cheap and can be obtained after quenching and tempering (or normalizing). It can also obtain comprehensive mechanical properties such as high strength and toughness. The surface hardness after quenching can reach 45 ~ 52HRC. 40Cr and other alloy structural steels are suitable for medium-precision and high-speed shaft parts. After quenching and tempering, this type of steel has good comprehensive mechanical properties. 40Cr is China's GB standard steel number. 40Cr steel is one of the most widely used steels in machinery manufacturing. After quenched and tempered, it has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. Steel has good hardenability. It can be hardened to Ф28 ~ 60mm when water quenched, and Φ15 ~ 40mm when oil quenched. In addition to quenching and tempering, this steel is also suitable for cyanidation and induction hardening. The cutting performance is good. When the hardness is HB174 ~ 229, the relative cutting workability is 60%.   3, 30CrMnTi It has higher strength and hardenability than 20CrMnTi steel, but its impact toughness is slightly lower. It is mainly used as carburizing steel. After carburizing, it can be directly quenched by lowe...
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  • Machining of shaft parts
    Dec 30, 2019

    Machining of shaft parts

    Shaft parts In industrial products, shaft parts are suitable for one or more CNC machined parts maintenance operations. Shaft parts are one of the typical parts often encountered in hardware accessories. It is mainly used to support transmission parts, transmit torque and bear loads. According to the structure of shaft parts, they can be divided into optical shafts, stepped shafts and special shapes. Three types of shafts; or solid shafts and hollow shafts. Surface roughness Ra2.5 ~ 0.63μm Radial runout 0.01 ~ 0.03mm Processing diameter 42mm Non-standard shaft parts batch processing equipment Shaft parts are one of the typical parts often encountered in hardware accessories. It is mainly used to support transmission parts, transmit torque and bear loads. According to the structure of shaft parts, they can be divided into optical shafts, stepped shafts and special shapes. Three types of shafts; or solid shafts and hollow shafts. They are used in machines to support transmission parts such as gears, belt wheels, etc. to transmit torque or motion. Shaft parts are rotating parts, whose length is greater than the diameter, and are generally composed of the outer cylindrical surface, conical surface, inner hole and thread of the concentric shaft and the corresponding end surface. According to different structural shapes, shaft parts can be divided into optical axis, stepped shaft, hollow shaft and crankshaft. A shaft with an aspect ratio of less than 5 is called a short shaft, and a shaft with an aspect ratio of more than 20 is called an slender shaft. Most shafts are in between. The shaft is supported by a bearing, and the shaft section that cooperates with the bearing is called a journal. Journals are shaft assembly standards, and their accuracy and surface quality are generally high. Technical requirements are generally based on the main functions and working conditions of the shaft. Generally, there are the following: (a) Surface roughness Generally, the surface roughness of the shaft diameter matched with the transmission is Ra2.5 ~ 0.63μm, and the surface roughness of the support shaft diameter matched with the bearing is Ra0.63 ~ 0.16μm. Zhonglida Machinery Co., Ltd. can process a surface finish of Ra0.05μm. (b) mutual position accuracy The position accuracy requirements of shaft parts are mainly determined by the position and function of the shaft in the machine. Normally, the coaxiality of the bearing assembly journal to the support journal should be guaranteed, otherwise it will affect the transmission precision of the transmission member (gear, etc.) and generate noise. For a normal-precision shaft, the radial runout of the supporting shaft journal to the supporting journal is generally 0.01 ~ 0.03mm, and the high-precision shaft (such as the main shaft) is usually 0.001 ~ 0.005mm. (c) Geometry accuracy The geometric accuracy of shaft parts mainly refers to the roundness and cylindricity of the journal, outer tapered surface, Morse taper, et...
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  • CNC machining process of shaft parts
    Dec 23, 2019

    CNC machining process of shaft parts

    CNC machining process of shaft parts Shaft parts are one of the products we received the most orders. According to the structure of the shaft, it can be divided into three types: optical axis, step axis and special axis. Their role is to support gears, belt wheels and other transmission parts to transmit torque or motion. The processing technology of stepped shaft is more typical, which reflects most of the content and basic rules of shaft parts processing. The following uses the transmission shaft in the reduction gearbox as an example to introduce the processing technology of a general step shaft, that is CNC machining parts. 1.Part drawing analysis The parts shown in Figure A-1 are the drive shafts in the reducer. It belongs to the step shaft type parts, which is composed of cylindrical surface, shaft shoulder, thread, screw tail retraction groove, grinding wheel overtravel groove and key groove. The shaft shoulder is generally used to install the axial position of the part on the shaft. The role of each ring groove is to make the part have a correct position when assembling, and to make it easy to retract the tool when grinding the outer circle or thread. Install keys to transmit torque; threads are used to install various lock nuts and adjustment nuts. According to the working performance and conditions, the transmission shaft pattern (Figure A-1) specifies the main journals M, N, the outer circles P, Q and the shoulders G, H, I have higher dimensions, position accuracy and smaller Surface roughness value and heat treatment requirements. These technical requirements must be ensured during processing. Therefore, the key process of this transmission shaft is the machining of journals M, N and outer circles P, Q. For example brass nozzle. 2.Determine the blank The material of the transmission shaft is 45 steel. Because it belongs to a general transmission shaft, 45 steel can be selected to meet its requirements. In this example, the transmission shaft belongs to medium and small transmission shafts, and the diameter of each outer circle is not much different, so a 60mm hot-rolled round steel is selected as the blank. 3.Determine the machining method of the main surface Drive shafts are mostly rotary surfaces, and are mainly formed by turning and cylindrical grinding. Due to the higher tolerance grade (IT6) of the main surfaces of the drive shaft M, N, P, and Q, and the low surface roughness Ra (Ra = 0.8 um), grinding is required after turning. The machining scheme of the outer surface (refer to Table A-3) can be: Rough turning → semi-finishing turning → grinding. 4.Positioning reference Reasonably selecting the positioning reference has a decisive effect on the size and position accuracy of the part. Since the several main mating surfaces (Q, P, N, M) and shoulder surfaces (H, G) of the transmission shaft have radial circle runout and end face circle runout requirements for the reference axis AB, it is a solid shaft Therefore, the cen...
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  • Basic information of the cover parts
    May 20, 2017

    Basic information of the cover parts

    The basic shape of such parts is a flat disk shape, generally having end caps, bonnets, gears, etc., and their main structure is generally a rotating body, usually with various shapes of flanges, uniformly round holes. And local structures such as ribs. In the view selection, the cross-sectional view of the symmetry plane or the rotary axis is generally selected as the main view, and other appropriate views (such as the left view, the right view or the top view) are added to express the shape and the uniform structure of the part. A left view is added as shown to represent a square flange with rounded corners and four evenly spaced through holes. When dimensioning the parts of the disc cover, the axis passing through the shaft hole is usually selected as the radial dimension reference, and the main dimension reference in the length direction is often selected as the important end face.
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  • China Conference on Integration of Informatization and Industrialization
    Mar 20, 2019

    China Conference on Integration of Informatization and Industrialization

    Xiamen Zhong Li Da Machinery factory for China Conference on Integration of Informatization and Industrialization,organized by China Service Alliance for Integration of Informatization and Industrialization(CSAIII)and China Alliance for Manufacturing Industry and Internet Integration,Being implemented,.Major for high precision metal parts factory. The integration of the two technologies is a high-level deep integration of informationization and industrialization. It refers to the industrialization of informationization, the promotion of informationization by industrialization, and the path of new industrialization. The core of integration is the support of informationization and the pursuit of sustainable development.Good for our custom design metal part processing with CNC machining service and CNC milling service. The integration of two technologies means that electronic information technology is widely applied to all aspects of industrial production, and informationization has become a routine means of industrial enterprise management. The process of informatization and the process of industrialization are no longer independent of each other. They are no longer unilaterally promoting and promoting relations. Instead, they are intertwined at all levels of technology,hardware products, and management. They are inseparable from each other and promote industrial electronics and industrial software. New industries such as industrial information services. The integration of the two is the inevitable outcome of the development of industrialization and informationization to a certain stage. "Enterprise informationization, information bar code" is the description of the national "Internet of Things 12th Five-Year Plan."
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  • Basic information that is indispensable for bushings
    Sep 24, 2018

    Basic information that is indispensable for bushings

    Shaft and Bushing parts Such parts generally have parts such as shafts and bushings. When the view is expressed, as long as a basic view is drawn and the appropriate section and dimension are drawn, its main shape features and local structures can be expressed. In order to facilitate the drawing when processing, the axis is generally projected horizontally, and it is preferable to select the position where the axis is a side perpendicular. When dimensioning a bushing-type part, its axis is often used as a radial dimension reference. Thus, Ф14 and Ф11 (see A-A section) shown in the figure are taken out. In this way, the design requirements and the process reference during machining (the shaft parts are machined on the lathe, and the thimbles at both ends are placed against the center hole of the shaft) are unified. The reference in the length direction often uses important end faces, contact faces (bearing shoulders) or machined faces. As shown in the figure, the right shoulder with a surface roughness of Ra6.3 is selected as the main dimension reference in the length direction, thereby injecting dimensions of 13, 28, 1.5, and 26.5; and then the right axis end is the length direction. The auxiliary base, thus marking the total length of the shaft 96.
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  • Welcome TSUGAMI 266
    Aug 15, 2019

    Welcome TSUGAMI 266

    Welcome TSUGAMI 266 Now we already have series for Tsugami 203 205 266 MD60 and so on. To meet high request on tolerance metal parts process. Another CNC lathe are also under service. Like STAR, KITAMURA are in the listing. Every year's revenue has a planned investment in the equipment to strengthen our processing capabilities. In order to better serve our customers and meet the higher requirements of customers.
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  • Enter the second stage of training for IATF
    Aug 26, 2019

    Enter the second stage of training for IATF

    Xiamen Zhonglida Machinery Co., Ltd. is enter the second stage of training for IATF(International Automotive Task Force). Our factory is already in the trial stage It is expected to receive this certificate in 2020 At this stage, we are already producing large-scale precision stainless steel automobile shock absorber accessories. This system can better help our company to upgrade to a higher level in all aspects.
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