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576 results about "Roughcast" patented technology

Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel, and often pebbles or shells. The materials are mixed into a slurry and are then thrown at the working surface with a trowel or scoop. The idea is to maintain an even spread, free from lumps, ridges or runs and without missing any background.

Glaze material for Jun red glaze and process for preparing Jun porcelain from glaze material

InactiveCN105036812ABright colorWarm and smooth glazeClaywaresCalciteSlurry
The invention discloses a glaze material for Jun red glaze and a process for preparing Jun porcelain from the glaze material. The glaze material consists of the raw materials of melilite, quartzite, calcite, white feldspar, copper ore, ZnO, SnO, GuO, talc, BaO, zirconium silicate and spodumene. The preparation process comprises the following steps: firstly, smashing roughcast raw materials and conducting moulding to fire a plain roughcast, then immersing the plain roughcast into slurry of the glaze material of the Jun red glaze for glazing, and when the slurry adhered on the surface of the plain roughcast is dried, putting the plain roughcast in a kiln for firing, so as to obtain the Jun red glaze Jun porcelain. According to the glaze material for the Jun red glaze and the process for preparing the Jun porcelain by utilizing the glaze material, spodumene and zirconium silicate are added in the glaze material for the Jun red glaze, so that the fired Jun red glaze Jun porcelain is bright in color, mild and smooth in glaze surface, and uniform in cracking, and breaks through the condition that the general Jun red glaze Jun porcelain is dim in color and nonuniform in cracking; the Jun porcelain is taken as the specialty of China, and represents the advanced level of the manufacture process of China, and the social value of the Jun porcelain is improved.

Inner layer granule reinforced cylinder sleeve and method of manufacture

The present invention discloses a reinforced internal layer particle cylinder sleeve and a manufacturing method thereof. The reinforced internal layer particle cylinder sleeve comprises a cylinder sleeve substrate which comprises a radial inner reinforced layer and an outer non-reinforced layer. The reinforced layer consists of reinforced particles distributed in the cylinder body substrate. The reinforced layer and the non-reinforced layer are combined by an alloy combined transition layer. The transition of the reinforced layer and the non-reinforced layer of the present invention is uniform, slow, stable and firm, thereby prolonging the service life of the cylinder sleeve; the cylinder sleeve has light weight, low porosity factor and good mechanical performance and thermal performance and improves the working efficiency of an engine; the manufacturing method has simple technical process and high production efficiency; the content of the reinforced particles in the non-reinforced layer is zero, thereby increasing the wearability of the inner layer and also causing no influence on the integral mechanical performance of the cylinder sleeve, such as the intensity of tension, and the like; the cylinder sleeve uses a centrifugal casting method to form an inner layer particles segregated roughcast and then is made by the heat treatment and mechanical cutting, processing and manufacturing of the roughcast.

Roll type cold pressing processing method and device for vehicle driving axle housing

A roll typed impact extrusion processing method and a device of automobile drive axle housing adopts roll typed impact extrusion technique to manufacture a lute-shaped housing expanded from the middle of the driving axle housing, namely, axial compressive force is loaded to the both ends of the axle housing roughcast or the semi-finished product; in the forming die, dedicated roll pressured rolling of the driving gear is adopted to implement repeated rolling and progressive roll typed impact extrusion operation to the inner wall of the workpiece, and processes the workpiece into the needed axle housing shape. As a lute-shaped hole of the middle of the axle housing is molded by reaming and roll typed impact extrusion technology, the volume of the metal material is progressively transferred a plurality of times, and the thickness of the deformation part of the material basically remains the same, so that the metallurgical structure of the steels of the area is compact, furthermore, surface hardening greatly strengthens all the mechanical performance of the corresponding parts of the axle housing body, and improves the integral mechanical strength and rigidity of the axle housing. The method has the advantages of simple technique, convenient operation, little investment of the dedicated device and die, reliable work, and simple and easy product model conversion, which is suitable for batch produce with a plurality of varieties.

Camshaft sand mold manufactured with tectorial membrane sand with reclaimed sand as roughing sand and manufacturing method thereof

The invention discloses a camshaft sand mould for manufacturing coated sands, which takes regenerated sands as base sands. The invention is characterized in that the invention is a passing shaft which is composed of an upper sand mould of the coated sands and a lower sand mould of the coated and, and provided with a boss in the middle portion. A manufacturing method comprises firstly, enabling waste sands to regenerate under high temperature, secondly, producing the regenerated sand, thirdly, taking the regenerated sands as the base sands and producing the coated sands, fourthly, heating the mould to 290-310 DEG C, fifthly, inbreathing the coated sands into the camshaft sand mould through compressed air, heating for 110-130 seconds, and curing into the mold, sixthly, obtaining an intact camshaft sand mould after adhering the upper sand mould and the lower sand mould. The superiorities of the invention lie in that blank dimensions of camshaft casts can be more accurate and process redundancy can be minimized due to the low thermal expansion rate of the sands, and cost can be saved. Defects of casts as air holes can be lowered due to low air forming property, and simultaneously effects to environment can be minimized, deformation and cracks of sand moulds can be avoided due to high strength, which is beneficial to arrange and transport, and the quality of cast surfaces can be increased. Flow ability can be improved, and defective indexes of the casts can be lowered. The invention has high strength, smooth surface and good breathing property.

Manufacturing method of lost foam casting foaming mold

The invention provides a manufacturing method of a lost-foam casting foaming mold. The invention is characterized in that the manufacturing method comprises the following steps: firstly, the three-dimensional CAD model of a casting part is manufactured, and a colophony prototype used for casting a blank of the foaming mold is manufactured through a rapid molding machine; secondly, a colophony prototype used for casting an electric spark working electrode is manufactured; thirdly, the inner cavity structure of the blank of the foaming mold is copied by using a colophony prototype with the same size with the casing part and silica gel; fourthly, the blank of the foaming mold is cast by using the composite ceramic shell casting technology; fifthly, the electric spark working electrode is cast by using the colophony prototype for enlarging the size of the casting part by 0.5-1.5 mm and the composite ceramic shell casting technology; and sixthly, the blank of the foaming mold is processed by using the electric spark and assembled to obtain the foaming mold. The invention is suitable for manufacturing the foaming mold with a complex-shaped inner cavity, can rapidly obtain the blank and the electrode of the foaming mold, enables the chrematistics of the arbitrary prototype with a complex shape through the rapid molding technology to be displayed more obvious as for the more complex shape and realizes the rapid manufacture of the lost-foam casting foaming mold.

Base-adjustable fixture for elongated workpiece with outer contour needing to be milled

A base-adjustable fixture for an elongated workpiece with the outer contour needing to be milled comprises a base, movable portal devices, a positioning device and a control system. A transverse guide rail is mounted at each of the upper and lower edges of the base, and limiting devices for limiting a workblank are arranged on the upper surface of the base at intervals according to the shape of the outer contour of the workblank needing to be machined. Movement of a portal frame structure of each movable portal device along the transverse guide rails is controlled by a portal frame cylinder. The positioning device comprises a press-down positioning device and a plurality of rotatable angle positioning devices, wherein the press-down positioning device is used for pressing down the middle of the workblank, and the rotatable angle positioning devices are used for pressing down the outer contour of the workblank. The control system controls the movable portal devices to move according to machining movement trails of a cutter and controls single or multiple positioning device bodies in the positioning device to loosen to make way for a cutter path. The base-adjustable fixture for the elongated workpiece with the outer contour needing to be milled has the advantages that deformation of the elongated workpiece during machining is avoided, machining efficiency is improved, the positioning device can be controlled to make way for the machining path of the cutter, operation safety is improved and machining precision is high.

Squeezing-revolving shaping method of magnesium alloy wheel and device thereof

InactiveCN101480670ASubstantiveSolve difficult to shapeExtrusion profiling toolsFuel tankSurface pressure
The invention relates to a method and a device for spinning and forming a magnesium alloy wheel, adopting a cylinder-shaped prefabricated roughcast. The method is characterized in that the prefabricated roughcast is arranged on a core die, a flat surface pressure device is used for flaring the prefabricated roughcast by axially moving the prefabricated roughcast, then the prefabricated roughcast and the core die rotate together and the prefabricated roughcast is spun through the radical feeding movement of a rotating spinning roller having the same outline shape as the wheel along the prefabricated roughcast, so that the prefabricated roughcast is subjected to continuous partial plastic deformation along the radial direction, and finally a needed outline of the magnesium alloy wheel is formed. Furthermore, the device comprises a stand and a core die, wherein the stand is in a box shape and is a consistent temperature oil tank, and the box-shaped stand is internally provided with a spinning roller device, a core die rotating device, the flat surface pressure device and a tank cover. In addition, the invention solves the problems of the forming and the demoulding of a similar part of a wheel which is small at both ends and big in the middle, and has the advantages of consistent temperature extrusion, higher dimension precision of products, enhanced production efficiency, and the like.

Continuous flow forming molding method different-radii metal plate manufactured flow forming belt pulley

ActiveCN101342554AImprove product qualityGood dynamic and static balance performanceShaping toolsPortable liftingContinuous flowRoughcast
The present invention relates to a continuous rotary extrusion forming method for a waney metal-plate rotary extrusion belt pulley with the outer wheel circle being provided with a V-shaped groove, and comprises the procedures of feeding, extension, shape correction, perforation, edge cutting, distribution and rotary extrusion forming; at the rotary extrusion forming procedure, a pre-forming wheel with a small-diameter U-shaped groove and a large-diameter U-shaped groove is used to perform the rotary extrusion on the Y-shaped cup-shaped belt pulley roughcast of an edge belt after the distribution procedure, and then a forming wheel with a small-diameter V-shaped groove and a large-diameter V-shaped groove is used to perform the forming rotary extrusion so as to be made into a formed wheel of a waney metal-plate rotary extrusion belt pulley; the value range of M and N is: M is more than or equal to 1 and is less than or equal to 10, and N is more than or equal to 1 and less than or equal to 10. The belt pulley that is produced with the forming method hereinabove has good dynamic and static balancing performance, and guarantees the size requirements when simultaneously driving two elements; the jumping consistence of the circle of the V-shaped groove surface is good; at the same time, the processing method also has the advantages of long service life of the distributing wheel and the forming wheel, simple processing procedures and short processing period.

Method for machining cylindrical mirror

The invention discloses a method for machining a cylindrical mirror. The method for machining the cylindrical mirror comprise the steps that a blank is obtained, and the reference surface of the blank is milled; the blank adheres to a tool with wax; the tool with the blank is arranged on a workpiece shaft of a milling device, and the reference surface of the blank is measured with a dial indicator and is clamped; programmed milling is conducted on the cylindrical surface to be machined; the surface type data of the machined cylindrical surface are measured; the surface type data are compared, if the Rt value is larger than 1 micron, correction milling is conducted, and if the Rt value is smaller than 1 micron, polishing is conducted; if the Rt value and the Ra value of the machined cylindrical surface of the polished workpiece meet expected requirements, the workpiece is detached from the tool, cleaning is conducted, and then the cylindrical mirror is obtained. By the adoption of the method for machining the cylindrical mirror, the machining efficiency and the machining precision of the cylindrical mirror are improved, the high-precision cylindrical mirror can be machined, the machining difficulty and the detection difficulty are effectively lowered, generation of waste is avoided, the machining rejection rate is reduced, the technologies are simple, operation is convenient, and good application prospect is achieved.
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