Service HotlineThe fixing screw proposed by Guangdong Yueluo Hardware Industry Co., Ltd. has a screw body 1, and the axial surface of the screw body 1 is formed with extending screw teeth 6, and the axial surface is a column along the central axis direction of the cylinder of the screw body 1. The body surface has a hemispherical screw tail 7 at the bottom, and a screw head 2 at the top. The upper surface of the screw head 2 is provided with a slot (not shown). The screw body 1 is composed of the upper tapered rod 4 and the lower cylindrical screw 5. The tapered rod 4 is an inverted cone, the diameter of its circular upper surface and the diameter of the screw mounting hole 10. equal. The fixing screw also has a washer 3, the washer 3 is arranged between the screw head 2 and the screw body 1, the lower surface of the cylindrical washer 3 has a number of teeth 8, the teeth 8 are along the The upper surface of the inverted cone of the tapered rod 4 and the edge of the washer 3 are connected to form a straight convex strip 15 extending outward; the convex strip 15 can also be designed in an arc shape. The fixing screws for installation proposed by Guangdong Yueluo Hardware Industry Co., Ltd. can be made of metal materials in one piece. As shown in Figure 3, it is a schematic diagram of the installation of Guangdong Yueluo Hardware Industry Co., Ltd. for PCB board fixing. When installing, first pass the screw body 1 of the fixing screw through the mounting hole 10 and the copper column 11 provided on the PCB board 9, so that the tail 7 of the screw reaches the mounting hole 13 on the casing 12, and then use the tightening tool 14 to insert the screw At the notch on the top of the head, forcefully press the inverted cone design taper rod 4 of the screw body 1 into the mounting hole 10, so that the tail 7 passes through the mounting hole 13. Due to the outer diameter D at the bottom of the taper rod and the screw mounting hole The aperture size of 10 is equal, and the fixing screws are pressed and fixed, so that the PCB board 9 can be automatically corrected in the process of fixing its front, back, left and right deflections, and the accuracy of the installation position of the PCB board 9 can be ensured. As shown in Figure 4, after the fixing screw is screwed into the casing, the washer 3 is fully contacted and pressed on the PCB board 9, and the PCB board 9, the copper column 11 and the casing 12 are firmly connected together without sliding. . The teeth 8 on the washer 3 are in full contact with the surface of the PCB board 9, so that a ground wire path is set up between the PCB board 9 and the casing 13 by the metal fixing screw 1, thereby ensuring that the PCB board 9 is fully grounded , the design of the teeth 14 on the washer 3 also has a non-slip function. The fixing screws for installation designed by Guangdong Yueluo Hardware Industry Co., Ltd. make use of the cooperation, friction and electrical conductivity in the mechanical connection, which fully guarantees the firm installation of the PCB board and the chassis and the good grounding of the PCB board. Moreover, the ellipsoid tail of the fixing screw The surface is relatively smooth, even if the mounting holes are exposed, it will not cause scratches on the hands and desktop. The above is only the embodiment of Guangdong Yueluo Hardware Industry Co., Ltd., and does not limit the scope of Guangdong Yueluo Hardware Industry Co., Ltd., any equivalent structure made by using the contents of the description and drawings of Guangdong Yueluo Hardware Industry Co., Ltd. or etc. Effective process transformation, or direct or indirect application in other related technical fields, are also included in the protection scope of Guangdong Yueluo Hardware Industry Co., Ltd.
screw is a tool that uses the physical and mathematical principles of the circular rotation and friction of an object to fasten the mechanism of the object step by step. A screw is a common term for fasteners, an everyday colloquial language. Screws are indispensable industrial necessities in daily life: tiny screws used in cameras, glasses, clocks, electronics, etc.; general screws in televisions, electrical products, musical instruments, furniture, etc.; as for engineering, construction, and bridges, large screws are used. Screws and nuts; transportation equipment, airplanes, trams, automobiles, etc. are used together with large and small screws. Screws have important tasks in industry. As long as there is industry on earth, the function of screws will always be important. Screws have been common in people's production and life for thousands of years. According to the application field, it is the largest of human beings.
Commonly used screw materials in my country are No. 45 steel, 40Cr, ammoniated steel, 38CrMOAl, superalloy, etc. 1) No. 45 steel is cheap and has good processing performance, but poor wear resistance and corrosion resistance. Heat treatment: quenched and tempered HB220-270, high-frequency quenched HRC45--48. 2) The performance of 40Cr is better than that of No. 45 steel, but it is often plated with a layer of chromium to improve its corrosion resistance and wear resistance. However, the requirements for the chrome plating layer are relatively high. If the plating layer is too thin, it is easy to wear, and if it is too thick, it is easy to peel off. After peeling off, it will accelerate the corrosion, and it has been rarely used. Heat treatment: quenched and tempered HB220—270, hard chrome plated HRC>553) nitrided steel, 38CrMoAl have excellent comprehensive properties and are widely used. Generally, the nitride layer reaches 0.4-0.6 mm. However, this material has low resistance to hydrogen chloride corrosion and is relatively expensive. 4) The superalloy material is superior to other materials. This material does not need coating, and is mainly used for the raw halogen-free screw of injection molding machine. The material has high oxidation resistance and corrosion resistance.
Related Specifications of Automobile Welding Nuts (Square Nuts) Serial Number Standard Number Name (English) Name (Chinese) Remarks 1 MS440014 NUT,WELD Welding Square Nut M8 2 MS440013 NUT,WELD (6) Welding Square Nut M6 3 MF445605 NUT,WELD (10 ) welding square nut M10 4 MU442002 NUT,WELD welding square nut M6 parking brake handle 5 MB077464 NUT,WELD welding square nut for seat belt welding square nut 6 MB040348 BOLT WELD (10X22) welding bolt M10×22, bearing surface 7 MF198353 BOLT,WELD (6X14) Weld bolt M6×14, end face 8 MR236366 NUT (12) Nut M12 Suspended trailing arm mount 9 MS440015 NUT,WELD (10) Weld square nut M10 10 PW832525 BOLD WELD 7/16 UNF Weld bolt 7/16 For seat belt, bearing surface 11 MB528563 STUD,WELD Welding stud M6×20 12 MS440066 NUT,WELD (5/16=18UNC) Welding square nut 5/16 Child safety system 13 MS440018 NUT, WELD (6) Welding square nut M6 14 MF198375 BOLT,WELD (8X30) Welding stud M8×30 15 MF198038 BOLT, WELD (6X25) Welding bolt M6×25, bearing surface 16 MR236467 NUT (12) Welding square nut M12, for engine mount 17 MF140024 BOLT, FLANGE (8X18) Hexagon flange bolt without 3D 19 MF198036 BOLT,WELD (6X20) Weld stud M6×20 20 MF198034 BOLT,WELD (6X16) Weld bolt M6×16, bearing face 21 MS440012 NUT,WELD (5) Weld Square Nut M5 22 MB343340 BOLT,WELD (8X26) Welding Bolt M8×26, Bearing Surface 23 MB138471 STUD,WELD Welding Stud M8×46, Bearing Surface 24 MS190066 BOLT,WELD (8X16) Welding Bolt M8×16, Bearing Surface, NO 3D 25 MS240145 BOLT,WASHER ASSEMBLED (8X20) BOLT AND WASHER ASSEMBLY NO 3D 26 MB281149 NUT,WELD(6) WELD BOLTS M8, NO THREADS REQUIRED FOR BEARING 27 MF445603 NUT,WELD (6) Welded square nut M6 Reinforcing plate for rear door lock 28 MS190068 BOLT,WELD (8X20) Welded bolt M8×20, bearing surface 29 MU431507 NUT,WELD Welded square nut M8 for door hinge installation 30 MS240121 BOLT,WASHER ASSEMBLED (6X16) Bolt and washer assembly M8 for fuel filler cap 31 MS100221 BOLT,FLANGE (6X12) Flange face bolt M6 for fender mounting 32 MB344675 STUD,WELD Weld stud M6×10
The purpose of Guangdong Yueluo Hardware Industry Co., Ltd. is to overcome the above shortcomings and provide a limit screw. The technical scheme of Guangdong Yueluo Hardware Industry Co., Ltd. is realized in the following way. Its structure is composed of screws, hexagonal copper posts and limit necks. The left end of the limit neck is open, the hexagonal copper column is communicated with the inside of the limit neck, and the inside is provided with screw threads. The design length of the screw thread in the hexagonal copper column is 1/3-2/3 of its own length. The advantages of Guangdong Yueluo Hardware Industry Co., Ltd. are (7), which can effectively prevent the problem of poor memory contact caused by the increase of the deformation of the motherboard due to the warping and deformation of the motherboard during installation and fixation, and can effectively control the amount of deformation effect.
We have many years of experience in the production and sales of screws, nuts, flat washers, etc. The main products are: aircraft DIY body rod internal thread nut, black 12.9 grade screws, supply flower tooth nuts, chamfered positioning pins and other products, we can provide you with suitable Your fastener solution.
