43results about How to "Guaranteed Dimensional Tolerances" patented technology

The invention relates to a fully-hydraulic four-arm anchor rod / anchor cable drill carriage. The fully-hydraulic four-arm anchor rod / anchor cable drill carriage comprises a traveling mechanism, drilling mechanisms, a lifting mechanism, a drill arm mechanism, a temporary supporting mechanism, a pump station part, an electrical system and a hydraulic system, wherein the electrical system is connected with the pump station part and is used for controlling the pump station part; the hydraulic system comprises an oil tank and a hydraulic pipeline; the hydraulic pipeline is used for connecting the oil tank, the pump station part and each execution mechanism; the traveling mechanism is positioned at the bottom of the drill carriage; an installation platform is arranged on the upper part of the traveling mechanism; the oil tank, the pump station part and the electrical system are fixed on the installation platform; the lifting mechanism comprises a front lifting platform and a rear lifting platform, which can independently lift; the drill arm mechanism comprises two front drill arms and two rear drill arms, which are respectively arranged on the front lifting platform and the rear lifting platform; the top end of each drill arm is provided with a drilling mechanism; the temporary supporting mechanism is arranged on the front lifting platform and / or the rear lifting platform. By virtue of the fully-hydraulic four-arm anchor rod / anchor cable drill carriage provided by the invention, the supporting operation of a working face of a tunneling machine can be mechanized, supporting efficiency and operation safety coefficients are improved, and the labor intensity is reduced.

The invention relates to a numerical control machining method for a thin narrow notch with a thin edge. The notch is 32 mm in depth, and 3 mm in height, and is formed according to the following steps: 1) fixing a part on a tooling clamp; 2), carrying out roughing with a standard disk miller of which the diameter D is 60 mm and the thickness d is 2 mm; 3), carrying out semi-finishing with a standard disk miller of which the diameter D is 60 mm and the thickness d is 2.5 mm; and 4), carrying out finishing on the notch. According to the method, the problem that the size of the notch is extremely poor is solved; and a more reasonable method is provided for the numerical control machining of the whole tooling, so as to ensure high processing precision of the whole tooling and improve the production efficiency.

The invention discloses a busbar assembly device, a busbar self-piercing riveting system and a busbar assembly method. The busbar assembly device comprises a control device, a transverse reference device, a longitudinal reference device and a vertical reference device, wherein the control device is used for acquiring the parameter information of a busbar to be assembled and forming a control signal; the transverse reference device is used for providing a transverse reference of the busbar to be assembled; the longitudinal reference device is used for providing a longitudinal reference of the busbar to be assembled; the vertical reference device is used for providing a vertical reference of the busbar to be assembled; and the control device controls at least one of the transverse reference device, the longitudinal reference device and the vertical reference device according to the control signal and provides the transverse reference, the longitudinal reference and the vertical reference for the busbar to be assembled. In the busbar assembly device, the parameter information of the busbar to be assembled is acquired by using the control device, the control signal is formed, and the transverse reference, the longitudinal reference and the vertical reference, which are matched, are provided for the busbar to be assembled, so assembly accuracy and assembly efficiency can be improved, and the position relation between all parts of the busbar and the dimensional tolerance of the overall structure of the busbar are guaranteed.

The invention discloses a technological method for processing an outer circular-arc surface and a rotary bracket used for the technological method. The rotary bracket comprises a central part which is a seamless steel pipe, wherein circular cover plates are arranged at the two ends of the central part; a plurality of triangular rib plates are arranged at the outer sides of the circular cover plates; and a plurality of groups of fixed parts are arranged at the outer side of the central part. In a processing process, the technological method is convenient in measuring the diameter of an outer circle of a workpiece, so that circular-arc-surface dimension tolerance can be effectively guaranteed; and a lathe is used for processing, so that the outer circle can be conveniently polished, and relatively large steps are prevented from being reserved in a circular arc surface processed by a milling machine; and the technological method is used for processing the circular arc surface of the workpiece, so that drawing requirements can be quickly and simply reached.

The invention relates to a stator base processing and manufacturing method, comprising the steps of: (1) inspecting the size allowance of a stator base blank piece; (2) using a carrying pole beam to lift the stator base blank piece to a vertical lathe workbench; (3) in a clamping process, welding three layers of pressing plates on a cylinder wall in a step shape, wherein each layer is provided with four pieces in a crossing mode to compress the stator base blank piece; and first performing rough turning, then loosening the pressing plates, and lightly pressing the pressing plates to perform finish turning on the size at each position; (4) measuring on the vertical lathe workbench to record all sizes to be used as a final installation size recording of a stator base; (5) using the carrying pole beam to lift the stator base after finish turning, and installing the stator base on a turning tool after assembling with a stator support; (6) turning the stator base, driving a turning mould to be lifted to a boring mill workbench, and using a drill lifting tool to lift a drill to distribute drilling holes after assembling with a sealing cover plate; and (7) turning trunnion apertures on two sides of a boring mill; and performing circularity regulation when deformation of the stator base is greater. The stator base processing and manufacturing method can effectively solve the problems of deformation and poor dimension.

The invention discloses a method for preparing a composite film on the surface of a rare-earth magnesium alloy structural part, which sequentially includes the steps of degreasing, first water washing, micro-arc oxidation, second water washing, electrophoresis, three times of water washing, and drying and solidification; micro-arc oxidation electrolyte Contains sodium silicate, sodium fluoride, sodium hydroxide, graphene, Cu(NO 3 ) 2 and triethanolamine aqueous solution, the electrical parameters of micro-arc oxidation are: forward current density 5~15A / dm 2 , negative current density 2~3A / dm 2 , the positive duty cycle is 25~70%, the negative duty cycle is 40~50%, the positive frequency is 200~800Hz, the negative frequency is 300~500Hz, the positive and negative series are both 1, and the micro-arc oxidation time is 10~20min; the electrophoresis liquid used for electrophoresis is an aqueous solution containing acrylate, matting agent and carbon black pigment, the electrical parameters of electrophoresis are: voltage 50~80V, time 10~30s; through the coordination of micro-arc oxidation and electrophoresis, it can be prepared A composite film that satisfies high hardness, high bonding strength, and UV aging resistance at the same time.

The invention relates to a rolling method of high-precision titanium alloy pipe material. The method is to roll the prepared titanium alloy tube billet by combining two rolls and three rolls. The rolling method is single-feeding and double-turning, controlled The Q value of two-roll rolling is 0.4-2, the Q value of multi-roll rolling is 0.4-9, and the gap is 0.2-2mm. After the rolled finished pipe is processed by external surface polishing and internal surface honing Titanium alloy pipes with outer surface roughness Ra≤0.6μm, inner surface roughness Ra≤0.2μm, outer diameter tolerance≤0.04mm, inner diameter tolerance≤0.03, and wall thickness tolerance≤3% of the nominal wall thickness were obtained. Compared with the prior art, the present invention has higher dimensional tolerance precision of the obtained product and better inner and outer surface quality.