58results about How to "Reduce the roughness value" patented technology

The invention relates to a method for the production of at least one longitudinal section of a catheter, wherein the method comprises the winding of film, and the film is provided in the form of strips, the film strip is wound in the manner of a screw such that the side edges of the film strip extending in the manner of a thread overlap the film strip, and further a bonded connection is created in the overlapping region such that the longitudinal section has a closed and at least fluid-tight surface. The invention further relates to a catheter produced according to the method, and a device for carrying out the method.

The elimination of iron scale on surface of stainless steel plate is completed with several shot blasting machines. The present invention features that SM150-type steel grits are filled into the material bin of the shot blasting machines and used in eliminating iron scale on surface of stainless steel plate. The present invention has sanding coefficient of 1.1-1.2, throwing head rotation speed of shot blasting machines of 1850-2000 rpm, annealing temperature of the hot rolled stainless steel plate of 1125-1140 deg.c, the brush roller pressure current in the pickling zone after elimination of 20-30 A, the washing water pressure not lower than 5Br and the technological speed of the hot rolled stainless steel plate of 60-67 m/min. Three shot blasting machines have separated thrown portions for high eliminating effect, and the present invention has low scale eliminating medium consumption, low cost and low surface roughness of the eliminated stainless steel plate.

There is disclosed a carrier and method for handling and/or transport of a substrate, such as during processing of the substrate, for example, back-thinning. The carrier and method provide support for the substrate. The process is particularly suited to thinning of substrates for use in 3D integrated circuits. The carrier comprises: a contact surface with one or more recesses therein for trapping a volume when the contact surface is brought towards the substrate, the contact surface for supporting the substrate; a sealing surface at the periphery of the contact surface and offset from the contact surface; and the sealing member seating on the sealing surface and arranged to be compressed to form a seal to the substrate when a substrate is in contact with the contact surface, the seal sealing the trapped volume between the substrate and carrier.

The invention relates to the field of deep chemical milling of titanium-alloy large-scale cylindrical parts, in particular to a deep chemical milling method of TA12 and TA15 titanium-alloy large-scale structural components. The deep chemical milling method comprises the following technological lines: degreasing, washing, pickling, washing, coating with a protecting adhesive, marking, removing a protecting adhesive film on a to-be-milled surface, chemically milling and conducting vibrating finishing. The method comprises the following steps: a titanium-alloy cylindrical part is processed into a thin-walled grid rib by adopting a deep chemical milling technology, and the thin-walled grid rib is primarily marked and chemically milled to obtain a chemical milling machine case shell with all mounting bases. The manufacturing of integral, thin-walled and grid-shaped titanium-alloy large-scale cylindrical structural components is completed by adopting the titanium-alloy deep chemical milling technology, and the requirement that the large-scale cylindrical parts are chemically milled to form the grid-shaped structure is met; and deformation, caused by machining, is avoided fundamentally, the problem of low strength caused by welding is solved, the overall rigidity of the component is improved, and besides, the production cycle is shortened, and the structural weight is reduced.

Electrode substrate for an optoelectronic device having a fabric (10) that includes electrically conductive (14; 56) as well as non-conductive (12; 50) and transparent fibres wherein the fabric is furnished over a wide area with a transparent, electrically conductive coating (26, 28, 58) in such manner that projecting or exposed portions of the electrically conductive fibres cooperate with the conductive coating in order to produce electrical contacts, wherein the conductive coating has a layer thickness that is smaller than a mean diameter of the electrically conductive and electrically non-conductive fibres of the fabric, a fabric weave of the electrically conductive fibres of the fabric is organized in such a manner that in order to create the protruding portions, the fibres encompass at least 2 of the non-conductive fibres that extend transversely in the manner of a twill weave, the fabric is embedded in the coating in such manner that portions (20; 22; 56) of the conductive fibres protrude from a non-conducting polymer material of the coating and/or are exposed, at least on one side of the coating, and the coating is applied to a polymeric, electrically non-conductive and transparent carrier film that is situated opposite the conductive coating that is applied to one side relative to the fabric.

The invention discloses a precise composite reamer. The precise composite reamer comprises a reamer handle, a reamer head and two blades, wherein the reamer handle is welded with the tail part of the reamer head; the reamer head comprises a cylindrical section and a working section; the working section of the reamer head is provided with two diagonal V-shaped chip discharging grooves; the two blades are respectively arranged at the front ends of the two V-shaped chip discharging grooves and are composite blades made of polycrystalline diamond (PCD); the reamer head is made of YG8; the reamer handle is made of GCr15; the reamer handle and the tail part of the reamer head are in V-shaped welding, and the direction of V-shaped welding and the diagonal direction of the two V-shaped chip discharging grooves are vertical. The part of the reamer head participating in cutting is made of YG8, so that (1) the rigidity of the reamer is increased; and (2) the part of the reamer participates in machining of chamfering and arc transition and also participates in cutting similarly to the PCD blades, so that the process requirements are met, and the cost is saved. The handle part is made of GCr15, so that the production cost of the reamer is reduced, simultaneously the machining difficulty of a thread hole in the tail part of the reamer handle is reduced, the production efficiency is increased and the production cost of the reamer is reduced.

A manually guided implement having a tool and a brake mechanism for the tool. The brake mechanism includes a brake band that is looped about a brake drum. The brake band and the brake drum form abrasion partners that cooperate with one another during a braking process. At least one of the abrasion partners has a coating. The coating is provided with diamond particles that are embedded in a matrix that contains nickel. The coating is effected in a nickel bath in which the diamond particles are dispersed.

The invention relates to a large-caliber optical primary mirror bore finish machining device which comprises a grinding assembly and three groups of optical primary mirror mounting and clamping assemblies, wherein the grinding assembly comprises a connecting body, a rotating assembly, a guide rail mounting plate, a linear guide pair, a grinding head assembly mounting plate, a transmission nut, a transmission lead screw, a grinding head lifting mechanism, a grinding head assembly, a guide rail sealing piece, an adjustment mechanism and a stroke control mechanism; each optical primary mirror mounting and clamping assembly comprises an adjustment screw supporting frame, an adjustment screw, a ball head cap and a ball head cap fixing ring; the grinding assembly has a working mode of being connected to a vertical lifting ram of a large vertical lathe through the connecting body; and the optical primary mirror mounting and clamping assemblies are uniformly fixed on a workbench of the large vertical lathe according to the size of the outer diameter of an optical primary mirror to clamp the excircle of the optical primary mirror. The grinding assembly is convenient to mount and flexibly to adjust the grinding and has simple structure and good practicability. The three groups of the optical primary mirror mounting and clamping assemblies are simultaneously used, and the excircle of the optical primary mirror is aligned by adjusting the adjustment screws, thus the method is simple and easy to apply.

A saw band (1) includes a tooth supporting body (2), a plurality of teeth (3) being located at the tooth supporting body (2) and a back (4) being located opposite to the teeth (3). The back (4) includes a profiled back portion (5). The profiled back portion (5) includes an inclination portion (6), a declination portion (7) and a compensation portion (8). The declination portion (7) is located next to the end of the inclination portion (6) and the compensation portion (8) is located next to the end of the declination portion (7). Alternatively, the inclination portion (6) is located next to the end of the declination portion (7) and the compensation portion (8) is located next to the end of the inclination portion (6), the length of the compensation portion (8) being shorter than length of the inclination portion (6) and the length of the declination portion (7).

The invention discloses a large-cycle water-aqua grinding process for a precision steel ball. In the large-cycle water-aqua grinding process, a bearing steel ball subjected to preliminary machining is machined by adopting a large-cycle machining method. The process is characterized in that an aluminum trioxide solution is used as a water-aqua grinding material in the large-cycle machining method for fine grinding of the steel ball, and a precision steel ball finished product is produced. The large-cycle water-aqua grinding process disclosed by the invention has the advantages that aluminum trioxide (Al2O3) superfine micro powder is used in an aqueous fine grinding liquid, so the pollution of chromium sesquioxide (Cr2O3: a grinding material used in an oil agent machining method) to the environment is reduced, the production operating condition of the steel ball is improved, and the health of operators can be guaranteed; the surface roughness value of the steel ball subjected to fine grinding with the water aqua is small, and the geometric accuracy can meet requirements; the surface quality of the steel ball is improved, and the surface defect is reduced obviously; and the process has an obvious effect on decreasing the vibrating value of the steel ball.

The invention provides a novel steering waterproof sealed bearing which comprises a bearing outer ring and a bearing inner ring, wherein the bearing outer ring is formed by combining a cylindrical side wall with a ring-shaped top wall; the ring-shaped top wall is connected with one end of the cylindrical side wall; an arc shape is formed at the joint between the ring-shaped top wall and the cylindrical side wall; the inner ring diameter of the ring-shaped top wall is the same as the inner diameter of the bearing inner ring; a rolling body is arranged between the bearing outer ring and the bearing inner ring; the working state of the rolling body is kept through a retainer; a ring-shaped sealing ring is mounted at the bottom end of the bearing inner ring; a sealing ring clamp groove is formed in the inner side of the bearing outer ring; the outer side of the sealing ring is clamped into the sealing ring clamp groove in the inner side of the bearing outer ring; the inner side of the sealing ring is in close contact with the bearing inner ring; and an outer flange is formed. The invention further provides a preparation method and application of the above novel steering waterproof sealed bearing. The novel steering waterproof sealed bearing provided by the invention can be protected from damage caused by rainwater or mud invasion; the vehicle steering performance can be effectively improved; and compared with a currently-applied steering bearing, the novel steering waterproof sealed bearing has the advantage that the service life can be prolonged by 10 times or above.

The present invention is electric spark machining liquid storing device with additive in the work liquid, and relates to the work liquid storing, processing and circulating device. The present invention includes work liquid trough, liquid storing trough, eddy current separator assembly, high shearing mixed liquefying machine, magnetic filter, two-position three-way valve and paper element filter. The eddy current separator assembly consists of pump, motor and eddy current separator. Owing to the filtering off of the machined electric corrosion slag and the stirring and filtering treatment of the conducting powder, the present invention has the work life of the work liquid about one time prolonged.

The invention discloses a wood door processing technology, which consists of a door pocket, a door plate and a door pocket line, and is characterized by sequentially comprising the following steps of: cutting the door pocket and the door plate; positioning and sanding; preparing materials; assembling a door blank; performing cold pressing; sanding the door blank; veneering; performing cold pressing; nailing the door pocket line; cutting finely; sanding; processing a lock hole and hinge slots; coating; and inspecting and warehousing, wherein the door pocket is made of a full Chinese fir laminated finger-joint board with the thickness of 20-30mm; the door plate is made of a Chinese fir laminated finger-joint board with the thickness of 30-40mm; and the door pocket line is formed by processing raw wood. After the technical scheme is adopted, the surface toughness of the wood door is low, the surface strength is greatly improved, and phenomena such as deformation, cracking, paint drop and the like cannot occur.

SOI wafers are manufactured to have very thin device layers of high surface quality. The layer is ≦ 20 nm in thickness, has an HF density of ≦ 0.1/cm², and a surface roughness of 0.2 nm RMS.

The invention discloses a resin CBN grinding disc for grinding copper alloy. The grinding disc is composed of a base body and a working abrasive layer; the working abrasive layer comprises resin binders and mixed filler; the resin binders are superfine phenolic resin; the mixed filler is composed of, by volume ratio, 15-20% of superfine silicon carbide with the grain size ranging from 10 micrometers to 20 micrometers, 3-5% of nanoscale silicon dioxide with the grain size ranging from 0.03 micrometer to 0.05 micrometer, 5-10% of glass beads with the grain size ranging from 8 micrometers to 15 micrometers, 5-15% of ultra-fine copper powder with the grain size ranging from 0.5 micrometer to 1.0 micrometer, 1-10% of superfine kaolin with the grain size ranging from 15 micrometers to 20 micrometers, 1-3% of superfine talcum powder with the grain size ranging from 15 micrometers to 20 micrometers, 1-5% of nanoscale polytetrafluoroethylene powder with the grain size ranging from 0.03 micrometer to 0.05 micrometer, 1-10% of diamonds and 10-25% of CBN. The grinding disc has the advantages that the heat conductivity is good, and burning of work-pieces does not occur easily; the grinding efficiency is high, and a cutting edge is sharp; the work-pieces do not deform easily; the roughness value is low, and the dimensional accuracy is within 0.003 millimeter; and blockage of a grinding wheel does not occur easily.

The invention discloses an anti-crack sand mold coating. The anti-crack sand mold coating is prepared by mixing the following components in percentage by weight: 20%-25% of graphite powder, 5%-10% of water glass and the balance of water. The graphite powder is used as a refractory material; the water glass is used as a binder and a penetrant; the water is used as a carrier and a main component and is capable of improving permeability of a coating in a casting surface; the graphite powder has high temperature resistance and lubricating performance, so that the surface roughness value of a casting can be decreased, and the defect that the casting is adhered with sand can be prevented or reduced; the water glass has good permeability and high temperature resistance, so that the permeability and the high-temperature strength of the coating can be improved, and the coating does not easily fall from the surface of a sand mold and crack; besides, the anti-crack sand mold coating is easily prepared, is low in cost and can be popularized and applied.

The invention discloses a method for growing a barium strontium titanate ferroelectric film on the surface of a titanium substrate in situ. The method comprises the following steps: (1) pre-treating the titanium substrate; (2) connecting the pre-treated titanium substrate to an anode, placing the pre-treated titanium substrate in a microarc oxidation electrolyte and carrying out microarc oxidation, reacting for 5-20min, and generating the barium strontium titanate ferroelectric film on the surface of the titanium substrate. The microarc oxidation electrolyte comprises the following ingredients: 0.2-0.8mol/L of barium hydroxide, 0.2-0.8mol/L of strontium hydroxide, and electrolyte additives which comprise 0.01-0.06mol/L of PVP and 0.01-0.08mol/L of EDTA; and (3) placing the titanium substrate treated in the step (2) in distilled water and soaking for 1-2 hours, and finally drying. The method disclosed by the invention is capable of preparing the barium strontium titanate ferroelectric film with level and compact surface, and good ferroelectric properties, simple in preparation process, capable of being carried out at normal temperature, free from subsequent heat treatment, environment-friendly and pollution-free.

The invention discloses a preparation technology of an ultrathin high-strength alloy tungsten wire diamond fretsaw, belongs to the field of solar photovoltaic slicing fretsaws, and mainly relates to a preparation method of a single crystal and polycrystal bar cutting fretsaw. The preparation method comprises the following steps: (1) preferably selecting a black tungsten wire, and preparing a silver white metal luster tungsten wire through pay-off, trinary electrolytic polishing, washing, drying and take-up; and (2) sequentially enabling the tungsten wire treated in the step (1) to be subjected to pay-off, secondary oil removal, acid pickling, nickel impacting, sand feeding, sand consolidation, heat treatment and take-up, and preparing the alloy tungsten wire diamond fretsaw with the specification of 30-40 microns through the steps. The high-strength ultrathin tungsten alloy diamond fretsaw is prepared by optimizing, combining and controlling the process parameters of the step (1) and the step (2), when a large-size single crystal silicon rod is cut, the silicon material loss can be reduced by about 13%, the earnings of 288-300 yuan and 0.11-0.15 yuan of the newly added value of each piece can be produced by each cutter, and the high-strength ultrathin tungsten alloy diamond fretsaw has great economic and popularization values.

The invention discloses a turning lathe grinding workpiece device. The turning lathe grinding workpiece device comprises a grinding wheel bracket. The grinding wheel bracket is fixed to a turning lathe. A grinding wheel motor is connected to the grinding wheel bracket. The grinding wheel motor is connected with a grinding wheel by a spindle of the grinding wheel motor. The grinding wheel motor isconnected with an external power source through a wire. When the grinding wheel rotates, a circumferential groove of a workpiece can be ground. The turning lathe grinding workpiece device has the advantages that the circumferential groove with low roughness value can be directly machined at the turning lathe.