42results about How to "High precision size" patented technology

The present invention provides a cylinder apparatus wherein although an opening of a cylinder body is closed by a covering member, processing and parts' costs are reduced, fluid leakage is prevented, and the apparatus can be reduced in size.

A cylinder apparatus in which a piston 17 is caused to slidingly move in a bore 26 of a cylinder 21, the cylinder 21 comprising: a covering member 43 provided in a bottom portion 42 of the cylinder 21; and a cylinder body 46 having an opening that is closed by the covering member 43; the covering member 43 being friction stir welded to the cylinder body 46.

A finisher for finishing a booklet having a bundle of center-folded sheets, includes: a detector for detecting an end on a side of a folded portion of the booklet: a moving device for conveying the booklet by movement thereof; a controller for controlling the movement of the moving device; and a cutting device for cutting an edge on a side opposite to the end of the booklet, which has been conveyed by the moving device to a cutting position. The controller controls the movement of the moving device from a position where the detector has detected the end of the folded portion to the cutting position so that a size of a booklet after being cut is kept constant for each of sheet sizes.

A method of fabricating a wind turbine blade tubular spar, wherein the tubular spar extends along a designated axis, is made of reinforced polymer material having fibers arranged in at least two directions, and a polymer matrix incorporating the fibers, and has two caps and two webs; the method including the steps of: molding and cross-linking at least part of a cap or web in composite material; molding and cross-linking an L-shaped structure, which has two opposite parallel flanges, and at least partly incorporates the previously molded, cross-linked cap or web of composite material; repeating the above steps to mold and cross-link a further L-shaped structure; and joining the two cross-linked, L-shaped structures, with the flanges positioned facing in pairs.

The invention discloses an integral advancing scraping and rolling compound cutter for flexibly boring, scraping and rolling. A scraping head, a boring head and a rolling head are integrated, and scraping and rolling processing are performed during advancing. The integral advancing scraping and rolling compound cutter is simple in overall structure, is convenient to manufacture, and is low in cost; high-accuracy size and shape control and good guidance can be realized, scraping becomes smoother, and wave marks and errors on a processing surface of an inner hole in a previous procedure can be eliminated, so that a completed surface becomes smoother, and a better surface profile is formed; and moreover, a plurality of processing procedures are completed continuously, so that processing time is saved.

The invention discloses a method and fixture for controlling a turning deformation of an ultra-thin wall aluminum alloy high-precision nozzle sealing groove. The fixture comprises an elastic expansionsleeve support body (4) with a continuously variable outer diameter, an opening expansion ring (5) and a fixture body (6); the elastic expansion sleeve support body (4) and the fixture body (6) are detachably connected; and the opening expansion ring (5) is arranged on the outer peripheral surface of the elastic expansion sleeve support body (4); and the fixture body (6) is connected to a machinetool. According to the method and the fixture, the inner hole positioning of the nozzle of a special-shaped sealing groove is utilized, and the evenly distributed clamping force in the circumferential direction when the fixture is positioned and clamped is ensured by relying on a fixture profile and the arc inner surface of the nozzle is fitly close to 360 DEG, so that the clamping deformation and turning deformation of an ultra-thin wall aluminum alloy part are avoided; and meanwhile, the direction of clamping force is symmetrically stressed with a contact point of a tool and a part during the machining process, so that the deformation of the part is effectively controlled.

The invention discloses a method for electroplating the surface of a circuit board. The method comprises the following steps: performing etching thickness reduction treatment, namely performing etching thickness reduction treatment on a copper foil layer of a non-line graph region on the surface of the circuit board; arranging an electroplated film, namely covering the non-line graph region and a non-electroplated area in a line graph region on the surface of the circuit board with the electroplated film; performing electroplating, namely performing electroplating on the electroplated area in the line graph region by taking the copper foil layer subjected to the etching thickness reduction treatment as an electroplating wire; removing the electroplated film and forming a line graph, namely removing the electroplated film, and removing the copper foil layer left by etching thickness reduction in the non-line graph region to form the line graph on the surface of the circuit board. According to the technical scheme, the shortcomings of gold plating permeation, incomplete etching, collapse of a gold-plated region, short-circuit risk or the like of a conventional gold plating process are overcome; the method can be used for machining a circuit board with the requirements of high-density line and high-accuracy dimension.

The invention relates to a sizing machine. According to the sizing machine, the number of replaced roller machine frames can be decreased, and the production cost can be saved accordingly. The sizing machine comprises first transmitting devices, second transmitting devices, a first machine base, first roller machine frames, a second machine base and second roller machine frames. The first roller machine frames and the second roller machine frames are sequentially arranged in the rolling direction of steel pipes, the first roller machine frames are fixedly arranged on the first machine base, and the second roller machine frames are fixedly arranged on the second machine base. The outer diameters of largest billet pipes which can be rolled through the first roller machine frames are larger than the outer diameters of largest billet pipes which can be rolled through the second roller machine frames. An inlet archway is arranged on the outer side face of the first machine base, and an outlet archway is arranged on the outer side face of the second machine base. Output shafts of the first transmitting devices are connected with input shafts of the first roller machine frames, the number of the second transmitting devices is equal to the number of the second roller machine frames, and output shafts of the second transmitting devices are connected with input shafts of the second roller machine frames.

The invention discloses a method for machining a chip mounter guide rail seat through a gantry pentahedron numerical control machine tool. The method comprises the steps that the gantry pentahedron numerical control machine tool is firstly utilized for carrying out rough machining on a green body and machining the faces, corresponding to groove opening faces, of the green body to form a rough locating face; then, the green body is located and clamped with the rough locating face in the first procedure as the datum, side face semifinishing is carried out on the machine tool, and finish machining is carried out on the face corresponding to the rear side face to form a first locating face; the green body is located and clamped again with the first locating face as the standard, rough machining is carried out on the faces corresponding to the inner side groove faces of a sliding groove through the machine tool, and finish machining is carried out on the face corresponding to the lower bottom faces of connecting portions of the green body and the face corresponding to the front side faces of the connecting portions to form a second locating face and a standard face respectively; finally, the green body is located and clamped again with the second locating face as the fine datum face, and finish machining is carried out on holes and the faces corresponding to all the inner side groove faces of the sliding groove. The high-precision size can be machined successfully, and it is guaranteed that the machining quality of the chip mounter guide rail seat is stable 100 percent.

A method of manufacturing a support body for run flat, wherein in a case where the circumferential wall of a tubular blank B is pressingly held between inner and outer molding rollers 1 and 2 and where the molding rollers 1 and 2 are rotated to form at least one circumferentially continuous protruding part on the circumferential wall of the tubular blank B to process the tubular blank B into an annular shell, a molding roller having the maximum outer diameter that is substantially the same as the inner diameter of the tubular blank B is used as the inner molding roller 1.

The invention proposes insulating profiles of a polymer material, and methods for producing the insulating profiles, are disclosed

A method of manufacturing an in-mold decorative molded article includes supplying an in-mold transfer foil to a metal mold, injecting and cooling a molding resin and taking out an molded article formed of the molding resin cooled and cured in the metal mold in which a clear layer and a transfer layer having a decorative figure in the in-mold transfer foil are integrated on the surface by opening the mold, molding the molded article integrally with a cutting portion not necessary for a target product inside the metal mold by the molding resin at an outer periphery of the product and arranging a boundary of a printing region of the clear layer in the in-mold transfer foil in the cutting portion so as to be larger than the outer periphery of the product.