735 results about "Metal working" patented technology

The present invention provides a process for producing a saturated aliphatic hydrocarbon prepared using an α-olefin as a raw material and represented by the general formula (1), including the steps of: (I) producing a vinylidene olefin by dimerizing the α-olefin in the presence of a metallocene complex catalyst; (II) further dimerizing the vinylidene olefin in the presence of an acid catalyst; and (III) hydrogenating the obtained dimer. Further, there are provided a lubricant composition containing the saturated aliphatic hydrocarbon compound produced by the above process, a bearing oil consisting of the lubricant composition, and making use of the same, a bearing and gyral equipment. The saturated aliphatic hydrocarbon compounds produced by the process of the present invention have low-temperature fluidity, exhibiting low evaporativity, and excellent in thermal stability and oxidation stability. Thus, the saturated aliphatic hydrocarbon compounds are suitable for use as, for example, a base oil of lubricant composition for hydraulic pressure, turbine, working machine, bearing, gear, metal-working, etc.

A polycrystalline superabrasive composite tool can be produced using high pressure high temperature processes allowing for increased thermal resistance, wear resistance and toughness of abrasive tools, and additionally allowing for increased effective thickness of abrasive tools. A polycrystalline superabrasive compact can include a support substrate and a superabrasive polycrystalline layer having a diffusion bridge embedded therein that includes a carbide former. Additionally, a working layer can be attached adjacent to the superabrasive polycrystalline layer and opposite the support substrate to form a drill bit sandwich segment. The diffusion bridge matrix of the present invention allows for a new welding phase at each interface between the superabrasive polycrystalline layer and support substrate and between the polycrystalline layer and the metal working layer, thus eliminating delamination failure at the interfaces. The superabrasive polycrystalline layer can include superabrasive particles of varying particle sizes such that the final composite tool is tailored for specific abrading characteristics. The polycrystalline superabrasive composite tools can be incorporated for use in machining, drilling, grinding, cutting, polishing and similar abrasive applications.

The present invention belongs to the field of metal processing technology, and is especially one kind of metal fiber wire and its production process. The metal fiber wire is made with the material comprising C 0.03-0.08 wt%, Mn 0.20-0.46 wt%, Si 0.40-0.63 wt%, Ce or La 0.02-0.10 wt%, Al 4.8-5.9 wt%, Cr 15-26 wt%, Cu 0.05-2 wt%, S 0.03-0.04 wt%, P 0.04-0.05 wt% and Fe 66-81 wt%. The making process includes the steps of: feeding material, electroplating, tubing, straightening, drawing, annealing, maintaining temperature, winding, acid pickling, washing, stoving, etc. The metal fiber wire has single fiber diameter up to 6 micron, strength higher than 16 N/sq cm, elongation of 1.40 %, and high comprehensive performance.

The invention provides a closed fluid static pressure/ dynamic static pressure revolving worktable with high precision and rigidity, and relates to the field of automatic equipment of precision machinery. A plurality of axial bearings and radial bearings arranged along the axial direction are fixed by a plurality of slewing rings and bearing guide rails; the revolving worktable is provided with a balanced bearing to balance; kinematic pairs of a plurality of bearings rotate synchronously and are connected; fixed pairs of the bearings are connected through a base of the worktable; and sliding pairs of the radial bearings and bearing pairs of the axial bearings move rigidly, integrally and synchronously; and a relatively still sliding surface of the sliding pair of each bearing is provided with an oil chamber. Under the conditions that fluid pressure of the revolving worktable is same and the volume is equal, the axial rigidity, the radial rigidity and the bearing capacity are multiply improved, and the improved multiple is in direct proportion to the number of the bearings. The revolving worktable has the advantages of convenient design, simple manufacture, low cost, high precision and no abrasion. The revolving worktable is a key part of a high-precision metal working machinery, in particular to a functional part of large and oversize heavy equipment by using the key technology, and has more remarkable advantages in manufacturing equipment in the fields of navigation, astronavigation, large aircraft, and the like.

This invention provides a membrane-mediated electropolishing apparatus for polishing and/or planarizing metal work-pieces. The work-piece is wetted with a low-conductivity fluid. The wetted work-piece is contacted with a first side of a charge-selective ion-conducting membrane, wherein the second side contacts a conductive electrolyte solution in electrical contact with a electrode. Current flow between the electrode and the work-piece electropolishes metal from the work-piece. This invention also provides a half-cell adapted for use in membrane-mediated electropolishing having a fully or partially enclosed volume, a conductive electrolyte which partially or essentially fills the enclosed volume, an electrode which is in contact with the electrolyte, and a charge-selective ion-conducting membrane which seals one surface of the enclosed volume, cavity or vessel in such a way that the internal surface of said membrane contacts the electrolyte solution or gel and the external surface is accessible to contact the work-piece.

The invention relates to an environment-friendly safe solvent cleaning agent which specifically comprises the following components in parts by weight: 0-97 parts of C10-C12 alkanes, 3-100 parts of alcohol ether solvent, 0.00-0.01 part of antioxidant and 0.00-0.01 part of corrosion inhibitor. The environment-friendly safe solvent cleaning agent provided by the invention is narrow in boiling range and the distillation recovery rate of the environment-friendly safe solvent cleaning agent can be above 95%; the environment-friendly safe solvent cleaning agent is also high in clearing ability, and has strong cleaning ability for polar dirt and nonpolar dirt; especially, the environment-friendly safe solvent cleaning agent can be used for thoroughly cleaning various metal working fluids, and oil-based and water-based cutting fluids without any residual and corrosion on metals; moreover, the shortcoming that the previous hydrocarbon type cleaning agents are wide in boiling range and only capable of dissolving and cleaning the nonpolar dirt are overcome. The cleaning agent is perfect in balance of cleaning ability, safety, dryness and reproducibility.

A method for surface roughening a metal work piece includes disposing the work piece proximate to a counter electrode. The work piece and the counter electrode are disposed in an electrolyte. An electric potential with current flow is applied between the work piece and the counter electrode to roughen the metal surface to a desired roughness.

This invention provides a membrane-mediated electropolishing process for polishing and/or planarizing metal work pieces. The work piece is wetted with a low-conductivity fluid. The wetted work piece is contacted with a first side of a charge-selective ion-conducting membrane, wherein the second side contacts a conductive electrolyte solution in electrical contact with a cathode. Current flow between the cathode and the work piece electropolishes metal from the work piece. This process can be used for both pure metals and alloys, and provides several significant advantages over conventional electropolishing processes. This invention also provides an apparatus useful in the membrane-mediated electropolishing process.

A swivel head assembly for a clamshell lathe is provided. The swivel head module includes an adjustable tool head assembly. The adjustable tool head assembly has a tool for machining a work piece, and is capable of being incrementally advanced in a radial direction against the work piece. The swivel head assembly further includes a means for positioning the metal working tool along an x-axis, y-axis, and z-axis. A tripper assembly is operatively coupled to the tool head assembly to incrementally urge the tool head against the work piece upon each revolution of the clamshell ring. The tripper assembly incorporates a solenoid for selectively incrementally advancing the tool against the work piece.

The invention relates to a micro arc oxidation metal bracket capable of controlling degradation and the preparing method. The bracket is provided with a micro arc oxidation film and a degradable polymer coating. The method comprises the steps showed as follows: processing a degradable metal into a bracket; pretreating the bracket to remove the oxide at the surface of the bracket; putting the bracket into the micro arc oxidation electrolyte, as the anode of an electrobath, the bracket is put in the direct current or alternating current to have micro arc oxidation treatment, ensuring the surface of the bracket have the micro arc oxidation film; cleaning the bracket after the micro arc oxidation treatment; spraying degradable polymer material at the bracket surface after being cleaned and the degradable polymer material carries therapeutic medicine. The micro arc oxidation film at the bracket can reduce the erosion speed of the bracket remarkably, can prolong the service life of the bracket and simultaneously guarantee the mechanical property of materials in the degradation process.

A method using one or more of certain triazoles in an amount effective to reduce cobalt leaching during a metal working process from a metal working tool comprising cobalt, such as tungsten carbide particles bonded by cobalt, wherein the one or more triazoles comprise at least butyl-benzotriazole, and optionally one or more other benzotriazoles. Also, a composition is provided which comprises a metal working fluid and one or more of these triazoles in an amount effective to reduce cobalt leaching from metal working tools comprising cobalt, such as tungsten carbide particles bonded by cobalt.

A method for processing IC designs for different metal BEOL processes is provided for enabling fabricating using a metal fabrication process an IC originally having a backend design for a different metal fabrication process. The method first determines layer constructions of an original design of an IC for a first metal backend process, and, based on the layer constructions of the original design of the IC, constructs primitive layer constructions of a target design of the IC for a second metal backend process. The method then tunes an effective dielectric constant of a dielectric layer of the target design to match an associated capacitance of the target backend design with a corresponding capacitance of the original backend design. The method can be used to convert a backend design of an IC from an old metal process (such as Al process) to a new metal process (such as Cu process), without redesigning the IC for the new metal BEOL fabrication process.

The invention provides a pretreatment process for metal coating, comprising the following steps: pre-degreasing, degreasing, water washing one, water washing two, water washing three, and water washing four. The method replaces phosphatization by vitrification, and uses a phosphate-free environment-friendly vitrification agent for performing vitrification treatment to a workpiece, without waste residue or heavy metals, more environment-friendly and convenient to process. The vitrification film formed on the surfaces of the processed metal work pieces such as steels, zinc materials, galvanizing plates, electro-zinc plates and aluminium materials can improve the adhesion force and corrosion resistance, and is suitable for the coating by various types of paints. At the same time, the pretreatment process is simplified in technology, low in energy consumption and cost for all the steps processed at room temperature.

A fume extraction hood is designed to be positioned above a welding, cutting, or other metal-working location and to remove hot gases, smoke and fumes produced during these processes. The hood forms a box-like structure with an extractor rail structure disposed in an internal volume of the hood. The extractor rail structure comprises panels that force sharp turns in the gases, causing particulate matter to drop out of the gases both outside and inside the extractor rail. A primary path for gases accelerates and re-directs the gases entering into the extractor rail, and within the rail. The rail may form a dropout tray that can be removed for cleanout of collected particulate. The side and end rails of the hood may create a secondary path for gas not directly intaken into the extractor rail. This secondary path is re-directed towards the extractor rail, where gas is collected and particulate is forced to drop out as it joins the primary path.

A floatable impeller for multistage metal working pump includes an impeller hub which has an impeller metal working member supporting a rear wall of the impeller and an impeller plastic member integrally formed with the impeller working member. The impeller plastic member is engaged with and driven by the pump shaft. The impeller has a front wall attached with an impeller thrust ring which has a thrust metal working member integrally formed with a thrust plastic member located in front of the impeller front wall. The thrust plastic member serves as a bearing when rotating against a metallic pump shell of an adjacent pump unit for reducing friction loss. The impeller hub has axial grooves formed in the inside wall. The thrust plastic member has radial slots formed in the sidewall. The grooves and slots may collect and discharge grits and sands carried by fluid and generated by friction for reducing friction, improving pumping efficiency and enhancing pump durability.

The invention discloses a metal processing and molding method that lowers plastic resilience and solves the problems that the stamping and molding process of high-intensity metal sheets is hard to satisfy molding requirements, needs large load and difficult processing due to the larger yield stress and resilience. A plate (2) is placed on a cavity die (4); a stamping ring (1) is placed on the plate (2) and stamping force is exerted; a punch (3) is moved downward to exert force, and the plate (2) is deformed and flows into a die space (4-1) of the cavity die; the punch (3) is removed; the stamping ring (1) is removed; the plate (2) is oppositely placed on the cavity die (4); the stamping ring (1) is placed on the plate (2) and the stamping force is exerted; the punch (3) is moved downward to exert force, and the plate (2) is deformed and flows into the die space (4-1) of the cavity die. The metal processing and molding method lowers the yield stress of the high-intensity metal sheets, and has the advantages of easy processing and molding, reasonable design, reliable working, remarkable effect, simple and convenient operation, easy implementation, high precision and stronger generalization value.