447results about How to "Guaranteed support strength" patented technology

The invention discloses a 3D printing machine which comprises a printing chamber. A printing assembly and a bearing platform are arranged in the printing chamber. The printing assembly is arranged above the bearing platform. The printing assembly comprises a printing support, a printing head assembly and a curing lamp assembly, wherein the printing head assembly and the curing lamp assembly are connected to the printing support. The printing support moves in the printing direction. In the printing direction, the printing head assembly is located in front of the curing lamp assembly. The printing head assembly comprises a main printing head body of a printing model body and an auxiliary printing head body of a printing supporting material. The model main material is photosensitive resin. The printing temperature in the printing chamber is lower than the solidification temperature of the supporting material. The supporting material is solidified at the printing temperature. The invention further discloses a 3D printing method. By means of the 3D printing machine and the 3D printing method, the supporting material is removed easily.

The invention provides a ventilation steel channel, a manufacturing method of the ventilation steel channel, a ventilation structure and a motor. The ventilation steel channel provided by the invention comprises at least four ventilation steel channel sections which are sequentially connected, wherein an included angle between every two adjacent ventilation steel channel sections is smaller than 180 degrees; in every three ventilation steel channel sections which are sequentially connected, the ventilation steel channel sections at both sides are distributed at both the sides of the ventilation steel channel in the middle. According to the ventilation steel channel provided by the invention, the multi-turn structure can effectively break through a boundary layer between the ventilation steel channel and cooling gas flowing through ventilation grooves; the heat dissipation area is increased; cooling and heat dissipating effects are reinforced; meanwhile, under the condition of reducing used materials, supporting intensity of the ventilation steel channel can be ensured.

The invention relates to a connecting piece and a platform thereof. The connecting piece comprises a connecting frame and a mounting plate; the connecting frame is provided with a connecting rods, and the mounting plate is provided with through holes; the connecting frame consists of two U-shaped frames and a middle beam; two ends of the middle beam are fixedly connected with cross beams of the two U-shaped frames respectively; the connecting rods downwards extend and gradually thicken to form a cylinder, and the lower end of the cylinder is provided with screw threads; and the platform comprises a platform support, a platform component and a connecting piece, wherein the platform support and the platform component are mutually crossed and jointed together; the connecting frame on the connecting piece is buckled at the cross jointed part; the mounting plate is arranged on the bottom surface of the platform support, so that four connecting rods of the connecting frame pass through through holes of the mounting plate; and the platform support and the platform component buckled in the mounting plate are compressed and fastened through gaskets and nuts. The connecting mode of the platform component and the platform support is improved so as to be more practical.

The invention discloses an integrated construction method of a cast-in-place box beam inclined web formwork. The method includes the steps that firstly, the installation of a cast-in-place box beam ring lock support and bottom plate transverse I-steel is carried out; then, a plurality of inclined web supporting frames are installed on the corresponding bottom plate transverse I-steel respectively,and after the installation is completed, the length of adjustable supporting beams of the inclined web supporting frames is adjusted to ensure that the included angle between an inclined web and a bottom plate meets the installation drawing requirements of the inclined web; finally, the installation of the inclined web formwork is carried out, and acceptance inspection is carried out. According to the method, the inclined web supporting frames are adopted for supporting and positioning the inclined web formwork to ensure that the installation of the inclined web meets the drawing requirements, fixed supporting beams of the inclined web supporting frames are used for supporting an inclined web form and a chamfered arc form, and thus the supporting rigidity and strength are guranateed. Theconstruction method of the cast-in-place box beam inclined web formwork is simple, the installation is fast, the construction process is greatly simplified, and the construction cost is greatly reduced.

The invention discloses a road manhole cover with adjustable height, comprising a manhole cover, an upper manhole and a lower manhole which match with the manhole cover, at least two lifting devices and at least two auxiliary supports, which are connected with the upper manhole and the lower manhole. The lifting devices and the auxiliary supports are evenly distributed on the circumference of the upper underside of the lower manhole at intervals, and the screws at the lower parts of the lifting devices and the auxiliary supports are connected with the threads of the lower manhole; wherein the auxiliary supports contact with the lower underside of the upper manhole and the lifting devices are hinged at the lower part of the upper manhole. The road manhole cover is convenient to be adjusted in height, low in cost, stable in structure and adjustable in height.

The invention relates to a clamping device and a hanging tool structure applying the clamping device; wherein, the clamping device includes a clamping arm and at least two blocking clappers which are respectively arranged at the two ends of the clamping arm. The blocking clapper is provided with a fixedly connecting part arranged at the end part of the clamping arm and a clamping part extending out of the clamping arm. The clamping part is provided with at least one through hole. The claming device has the advantages of reducing the flow marks on the surface of a work-piece and improving the quality of the work-piece thereby.