36results about How to "Reduce springback deformation" patented technology

The invention relates to a PVC co-extrusion foaming floor and a preparation method thereof, and belongs to the technical field of PVC foaming floors. The PVC co-extrusion foaming floor comprises a PVCfoaming core and a plastic surface layer, wherein the PVC foaming core comprises a first foaming layer, a second foaming layer and a skinning layer, the second foaming layer wraps the first foaming layer, the skinning layer wraps the second foaming layer, and all the layers of the PVC foaming core are integrally connected; the plastic surface layer wraps at least the upper surface of the skinninglayer; the first foaming layer is a low-density foaming layer, and the second foaming layer is a high-density foaming layer; and wood textures are formed in the plastic surface layer. According to the PVC co-extrusion foaming floor and the preparation method thereof, one-time forming is achieved through an improved foaming process, so that compared with a PVC foaming core in the prior art that the first foaming layer and the second foaming layer are not obviously distinguished and the skinning layer is thin, the PVC foaming core has the advantages of being clearer in structural hierarchy andhigher in overall strength; and the PVC foaming core is more suitable for wrapping the plastic surface layer.

The invention provides a plate rolling and bending machine. The plate rolling and bending machine comprises two opposite supporting walls, a plurality of forming roller sets arranged in the conveying direction of a plate at intervals, a base, a screw rod driving mechanism and a connecting rod, wherein one supporting wall is fixed to the base, and the other supporting wall is movably installed on the base. Each forming roller set comprises an upper roller and a lower roller, the upper roller and the lower roller are oppositely arranged in the vertical direction, and each of the upper roller and the lower roller comprises a telescopic shaft and a roller body fixedly arranged on the telescopic shaft in a sleeving mode. The screw rod driving mechanism comprises a screw rod, a motor driving the screw rod to rotate and a screw rod nut connected to the screw rod in a screwed mode. The connecting rod is connected to the screw rod nut and the supporting wall movably installed so that the two supporting walls can get close or get away from each other, the distance between the two supporting walls can be adjusted for adapting to the bending operation of plates of different widths through the telescoping motion of the telescopic shafts of the forming roller sets, and use is convenient.

The invention discloses a numerical control pipe-bending machine control system, and relates to the technical field of pipe bending machining. The numerical control pipe-bending machine control systemcomprises a central controller, external inputting equipment, external outputting equipment and a pipe-bending machine executing part. The pipe-bending machine executing part comprises a feeding servo mechanism, an angle rotating servo mechanism, a pipe-bending servo mechanism, a clamping servo mechanism, a lifting servo mechanism, a horizontal moving servo mechanism, a plate backing servo mechanism and a follow-up servo mechanism. According to the numerical control pipe-bending machine control system, moving at different angles and positions is completed through eight-axis servo control, bending machining at any angle and radius can be achieved, and the machining precision is guaranteed; and meanwhile, quick replacing of a pipe-bending mold and a feeding clamp can be structurally achieved, and thus, a pipe-bending machine has the function of welding prior to bending.

The invention discloses a pipe fitting internal thread incremental rolling-extruding forming device. The pipe fitting internal thread incremental rolling-extruding forming device comprises an electricspindle box body of a numerically-controlled machine tool, a centring chuck is connected to one side of the electric spindle box body, a clamping jaw is fixed to one side of the centring chuck, a pipe fitting sample is fixed into the clamping jaw, a rolling-extruding forming tool wheel is arranged in the pipe fitting sample, a driving device is connected to one end of the rolling-extruding forming tool wheel, and a numerical control device of the numerically-controlled machine tool is connected to the electric spindle box body. The problem of low quality of an internal thread formed by current milling is solved.

The invention provides a rubber sealing strip used for an outer protective plate of an automobile door. The rubber sealing strip used for the outer protective plate of the automobile door is composed of a middle plate-shaped supporting portion, a first insertion claw portion, a second insertion claw portion and an outer arc protruding portion. The two insertion claw portions are located on the two sides of the plate-shaped supporting portion respectively, and the outer arc protruding portion is located on the two sides of the plate-shaped supporting portion. The rubber sealing strip is characterized in that a multi-body co-extrusion forming technology is adopted by the rubber sealing strip, and the hardnesses of the two insertion claw portions, the hardness of the plate-shaped supporting portion and the hardness of the outer arc protruding portion become smaller gradually. According to the rubber sealing strip, the hardnesses of the materials of different portions are adjusted by utilizing the multi-body co-extrusion technology, the two insertion claw portions have high hardness, so that the tension of the two insertion claw portions in the installation groove become larger, enough anti-disengagement strength is guaranteed, curling deformation caused in the assembly process is reduced, the assembly speed is increased, it is guaranteed that the rubber sealing strip can be installed in place, and the assembly quality is improved; the plate-shaped supporting portion has the moderate hardness, and therefore ineffectiveness caused by deformation of the sealing strip is avoided; the hardness of the outer arc protruding portion is low, so that the fit performance between the outer arc protruding portion and a metal plate of a door frame is improved, and therefore the leakproofness between the automobile door and the door frame is improved.

The invention discloses 460MPa grade cold-rolled microalloy high strength steel. The 460MPa grade cold-rolled microalloy high strength steel comprises, by mass, 0.051 to 0.059% of C, 0.01 to 0.02% ofSi, 1.17 to 1.27% of Mn, 0.2 to 0.5% of Al, P<=0.010, S<=0.006, 0.03 to 0.05% of Nb, 0.07 to 0.08% of Ti, and the balance Fe and unavoidable impurities. A manufacturing method is combined with component design and manufacturing technology improvement, so that the obtained steel products are high in strength, percentage elongation, spot welding performance, and moulding performance, excellent platability is achieved, rebound deformation performance is small, problems in the prior art such as poor formation performance, weldability, and rebound performance of high strength steel of the same grade are solved, and obvious social benefit and economic benefit are achieved.

The invention provides a novel transformer insulation plate bending device, which comprises a stock, a clamping part, and a bending part, wherein the clamping part comprises a fixing plate, a leadscrew nut mechanism, a cylinder mechanism and a lower pressing plate, the middle of the fixing plate is provided with a rectangular placement groove along the length direction, the left side and the right side of the placement groove are convex, the leadscrew nut mechanism transversely passes through the convex part of the placement groove, the cylinder mechanism is fixed on the top wall of the stock, and the lower pressing plate is located at the upper part of the placement groove and fixed on the cylinder mechanism; and the bending part comprises a supporting shaft seat, a rotating pressing plate and a handle, the rotating pressing plate and the supporting shaft seat are hinged and connected, and the handle is fixed on the rotating pressing plate. The level principle is used for realizing bending operation on the insulation plate, multidirectional positioning is carried out on the insulation plate during the bending process, the insulation plate is stably fixed, labor intensity is reduced, and the problem of rebound deformation of the insulation plate can be effectively reduced.

A composite material rotary body butt joint comprises a rotary body made of a composite material and a metal butt flange. The rotary end of the metal butt flange is embedded in the end socket of the composite material rotary body during the forming process of the rotary body.