Portal frame

About: Portal frame is a research topic. Over the lifetime, 1778 publications have been published within this topic receiving 7210 citations.

Camera bracket used on portal frame-type LED lamp welding machine

Abstract: The utility model discloses a camera bracket used on a portal frame-type LED lamp welding machine. The camera bracket comprises a portal frame and a camera. A boom extending forward is arranged on the cross bar of the portal frame; a clamping rod is transversely inserted in the tail end of the boom; a camera is inserted in the clamping rod; and the boom is in slide fit with the cross bar of the portal frame. By adopting the technical scheme, the camera can be adjusted back and forth, left and right, and up and down as well as be adjusted rotationally in the transverse and vertical directions, so that the camera bracket is convenient for adjusting the camera to aim at working areas.

Portal frame type ultrasonic-wave welding device for commercial clip production line

Abstract: The invention discloses a portal frame type ultrasonic-wave welding device for a commercial clip production line, and the device comprises an ultrasonic-wave welding mechanism and a supporting mechanism and is characterized in that the supporting mechanism comprises a base, a lateral moving mechanism and a support frame, wherein the support frame can be slidably fixed on the base; the ultrasonic-wave welding mechanism is fixed on the support frame; and the lateral moving mechanism is fixed on the base and is connected with the support frame. Compared with the prior art, the portal frame type ultrasonic-wave welding device has the beneficial effect that the horizontal position of the ultrasonic-wave welding mechanism can be regulated along the lateral direction of the base, the height of the ultrasonic-wave welding mechanism also can be regulated, and the portal frame type ultrasonic-wave welding device is convenient to use, high in regulation speed and high in precision.

Automatic vapour -pressure type dried bean curd slabbing machine

Abstract: The utility model discloses an automatic vapour -pressure type dried bean curd slabbing machine, the structure includes frame, motor, reduction gear, channel -section steel, conveyer belt, support frame, workstation, portal frame, cylinder, lifter, nut, manual valve, feed tray, gas source triplet, guide arm, well clamp plate, be equipped with the motor in the frame, the reduction gear is connected with the motor, channel -section steel and frame fixed connection, conveyer belt and channel -section steel swing joint, the support frame is connected with the channel -section steel, workstation and support frame fixed connection, be equipped with the cylinder on the portal frame, be equipped with the lifter on the cylinder, the lifter passes through the nut and is connected with well clamp plate, manual valve position is in the right side of portal frame, the feed tray is located above the support frame, gas source triplet is connected with the support frame, the utility model discloses an automatic vapour -pressure type dried bean curd slabbing machine, the structure is equipped with conveyer, and easy job person uses, and production efficiency is high.

Lateral-torsional buckling of haunched members in portal frames : an assessment of BS 5950 : part 1

Abstract: The research described in this thesis, relates mainly to the current method of design of steel portal frame structures. The study is divided into two major parts, first being the full-scale test on a 24 metre span frame and the second deals with the problems of lateral-torsional buckling in the haunch region of the frame. Detailed accounts of the full-scale testing on the 24 metre span frame and the experimental results are given. Supplementary tests on beams cut out from the tested frame in order to establish the strain-hardening factor are also presented. A literature survey on the published material pertinent to the lateral torsional-buckling of a tapered member was undertaken. Different methods of treatment for the elastic stability of tapered members and any evidence from previous research in this area were reviewed. Details of an appropriate finite element and the corresponding computer programme are given. This section describes the assumptions and the Finite Element formulations adopted in the computer programme. The earlier work on this analysis dealt only with prismatic members and this was extended to solve tapered sections. Therefore, a full calibration of the finite element formulation for a tapered member was carried out. The stability clauses in BS 5950 are introduced systematically. Theoretical work which leads to the formulation of the clauses in Appendix G is also described. These stability clauses were assessed by the analysis of selected prismatic and tapered members using the finite element formulation. From this assessment some modifications to the clauses are proposed. The results of the modified clauses are compared with those given by the finite element analysis and the original clauses. Lastly, the modified clauses are checked with the results of the portal frame tested, to confirm its validity. This study leads to the proposal for some amendments in the clauses in Appendix G and Clause 5.5.3.5. of BS 5950.

Fabric cutting machine for tailoring

Abstract: The utility model relates to a garment machinery technical field, in particular to fabric cutting machine for tailoring is fixed with first portal frame, second portal frame, unreels frame and backuppad group on the base, the diaxon head of compression roller rotates with two backup pads respectively to be connected, wiping roller's the diaxon head of rubbing rotates with the coexistence post offirst portal frame respectively to be connected, be provided with tension control mechanism on the first portal frame, be provided with the fabric cutting cylinder on the second portal frame, fabric cutting cylinder one end and second portal frame looks fixed connection, the fabric cutting cylinder other end is provided with the fabric cutting sword, the top surface of base is provided with two open slots that are parallel to each other, all be provided with clamping jaw pulling mechanism in the open slot Using the utility model discloses the time, through the tension of tension control mechanism controls cloth, make the cloth by exceptionally straight in this structure, through the automatic cloth of pulling out of clamping jaw pulling mechanism, very big limit ground improves fabric cutting's efficiency, reduces intensity of labour, improves the security of fabric cutting process