699results about How to "Improve pass rate" patented technology

The invention relates to a preparation method of a high-tensile high-model heterocycle aramid fiber, which comprises an integrated production method from polymerization, spinning to post-process. By optimizing the molar ratio of two diamine monomers, the invention prepares heterocycle polyamide solution polymer of which the diamine proportional distribution is narrower, the polymer solid content is 2-8%, and the dynamic viscosity is 5-3 million centipoise; and the heterocycle polyamide solution is subjected to deaeration, filtration and wet spinning, and can prepare the high-tensile high-model heterocycle aramid fiber with narrower diamine proportional distribution through spinning process control, wherein the breaking strength is 27-33cN/dtex, the modulus of elasticity is 950-1,200cN/dtex, and the elongation at break is 2.5-3.8%.

The invention discloses an OLED module Gamma adjustment and calibration method and device wherein the device comprises a PC, a controller, an image generator and an optical detection instrument. The method comprises the following steps: obtaining the theoretical brightness values of a target binding point according to the brightness value of the highest gray level W255 and the brightness value of the lowest gray level W0, and determining the target brightness value and the target color coordinate value of the target binding point; adjusting the R and G register values so that the color coordinate value of the target binding point falls within the error range of the target color coordinate value; adjusting the R, G and B register values so that the brightness value of the target binding point falls within the error range of the target brightness value; According to the invention, it is possible to adjust the brightness and coordinate of a finished OLED module bounded with IC so that the brightness meets a Gamma 2.2 curve, that the color temperature conforms to the CIE 1931 standard, and that the registers are solidified and adjusted to the EEProm of the OLED module's IC, making the OLED module present the visual curves most consistent with the human eye and achieve the display effect with a specific color temperature.

The invention relates to a regeneration method for an empty and old ink box of a printer, which comprises the technological steps as the following order: (1) a sealing membrane on a box cover is removed; (2) the ink box is immerged in deionized water of 50 DEG C to 80 DEG C for 5 to 10 minutes; a sealing ball is pressed in an ink storing cavity on the state of 40 to 80 DEG C, or a via hole is arranged to communicate the ink storing cavity and atmosphere; (3) the ink box is arranged on a centrifugal rotary table to dehydrate by centrifugal whirl; (4) an air guiding outlet and an ink supplying outlet are sealed; an ink pouring outlet or the via hole is sealed by elasticity material; a needle tube through pricks the elasticity material, inserts the ink storing cavity, and extracts air in the ink storing cavity until that negative pressure value is minus 720 to minus 750mmHg; (5) the ink is poured in the ink storing cavity by the needle tube on the state of the step (4); the regeneration ink box is obtained after pulling out the needle tube. The ink box recycled by the invention has a small amount of air residue and the yield can reach more than 85 percent.

The invention discloses a device and method for qualitatively detecting PCB (printed circuit board) board electromagnetic interference radiation performance, belonging to the technical field of electromagnetic detection. The device and the method solve the problems of low detection result accuracy and high price of the PCB electromagnetic interference. A control order is sent by a PC (personal computer) machine, a singlechip circuit determines the scanning operation mode of a near field probe according to the control order; the singlechip circuit simultaneously controls the movement direction and the movement distance of an X-axis direction stepping motor and a Y-axis direction stepping motor; the control signal of the singlechip circuit drives a corresponding motor to move so as to drive the near field probe to position; after the near field probe is positioned, the acquisition signal of the near field probe is received by a spectrum analyzer, and the acquired signal is transmitted to the PC machine; and finally, the processed data and images are displayed by a data processing and image displaying unit. The device and the method are used for detecting the PCB electromagnetic interference radiation.

The integrated circuit boundary scanning measurement device is used in measuring integrated circuit on printed circuit board in communication electronic technology. The boundary scanning measurement device utilizing the parallel port of computer includes bottom interface module, initializing module, measurement vector producing module, measurement module, fault analyzing and locating module, and boundary scanning describing language file analysis module. Boundary scanning measurement is completed via making full use of the PC resource, i. e., compiling PC boundary scanning application program, utilizing the parallel port in PC and assisting with the JTAG interface hardware unit. The present invention can complete the boundary scanning measurement of devices in printed circuit board and the whole printed circuit board. The present invention can raise the measurement capacity of printed circuit boards.

The invention discloses a method for preparing L-ornithine-L aspartate, which has the characteristics of taking L-ornithine acetate as a raw material and reacting the L-ornithine acetate with L-aspartate in water. The method particularly comprises the following steps of: dissolving the L-ornithine acetate in the water; adding the L-aspartate into the solution; regulating a pH value of the solution to be between 6 and 9 with ammonia; adding activated carbon for de-coloring and filtering; adding a reasonable amount of ethanol or methanol into a filtrate for stirring and crystallizing; and filtering and drying the filtrate to obtain the finished product. The method has the advantages of overcoming the defects existing in the prior art by using the property that ammonium acetate is easy to dissolve in the aqueous solution of alcohol, and also has the advantages of high yield, moderate reaction conditions, simple operation, stable product quality and the like.

The invention discloses a standard laminated plate and a manufacturing method thereof, which aim to improve the passing rate of laminated plates. The method comprises the following steps of: setting a test part on core plates for lamination and manufacture; stacking a plurality of the core plates and performing laminating operation to obtain the laminated plate; according to the position of the test part of a plurality of the core plates, mechanically drilling the corresponding position of the laminated plate to obtain mechanical holes; performing interlayer offset detection on the mechanically drilled laminated plate to judge whether the laminated plate is qualified. The technical scheme of the invention ensures that the standard laminated plate is the qualified laminate plate, thereby improving the passing rate of the laminated plates which are manufactured in batch by taking the standard laminated plate as the standard, and reducing the rejection rate of the laminated plates manufactured in batch.

The invention relates to a locally-free-telescopic single crystal blade-used complex-structured ceramic core preparation technology and belongs to the technical field of high-temperature alloy. The preparation technology comprises steps of: (1) firstly preparing a main ceramic core 1# ceramic core, a 3# ceramic core, and a high-performance local ceramic core 2# ceramic core, wherein the 1# ceramic core and the 3# ceramic core are provided with individual positioning core heads and the 2# ceramic core is in an individual column-shaped structure or an individual tube-shaped structure; (2) totally dip-coating the 2# ceramic core by a thin layer of wax; (3) assembling the treated 2# ceramic core, the 1# ceramic core and the 3# ceramic core and placing the assembled ceramic cores in a wax mould die to carry out wax pressing; and (4) performing a coating shell-making process, a dewaxing process, a sintering process, a single crystal directional solidification process and a decoring process to obtain a finish product of the blade. The preparation technology can effectively avoid a breaking phenomenon of the ceramic core and is suitable for being used industrially.

The invention provides an electrostatic chuck and semiconductor/liquid crystal manufacturing equipment. The subject of the invention is to raise reliability by configuring an electrostatic chuck for transporting chip trays in a plurality of chuck regions and in a concave surface portion arranged in an outside area. An electrostatic chuck includes, a chuck function portion including a plurality of chuck regions (10) on which an attractable object is placed respectively, and a concave surface portion (C) provided in an outer region of the chuck regions (R), and electrodes (40, 40a) arranged in an inner part of the chuck function portion corresponding to the chuck regions (R) and an inner part of the chuck function portion (10) corresponding to the concave surface portion (C), respectively.

The invention relates to a method for controlling glass to be heated in the glass toughening process. The method includes the steps that a plurality of temperature sensors used for detecting the temperature of the glass in a heating section are arranged on the heating section of a glass toughening furnace, the temperature sensors are connected with a control center of the glass toughening furnace, the control center is further connected with a transmission mechanism controller of the heating section, the temperature needing to be reached by the glass on the heating section through heating is set in advance according to different sorts of glass to be toughened before the glass is heated, when the temperature sensors detect that the temperature of the glass reaches the set temperature in the glass heating process, the control center sends an instruction to the transmission mechanism controller, the glass is moved out of the heating section, the next process is executed, an original mode that heating time is judged according to the experience of operators is changed, the percent of pass of finally-obtained toughened glass products is high, and the quality of the products is stable.

The invention relates to a method for embedding a capacitor into a multi-layer PCB (printed circuit board). The method comprises the following steps: 1, providing multiple inner core boards and two capacitor-embedded core boards, wherein each capacitor-embedded core board comprises a capacitor-embedded material layer in the middle and two copper layers at two sides; 2, primary inner-layer film drying: making secondary outer patterns on the capacitor-embedded core boards and manufacturing inner patterns on the inner core boards; 3, providing multiple prepregs, and superimposing the inner core boards, the prepregs and the capacitor-embedded core boards according to a preset superimposition sequence; 4, carrying out primary lamination so as to form a daughter board; 5, secondary inner-layer film drying: making outer patterns on the capacitor-embedded core boards of the daughter board; and 6, carrying out secondary lamination so as to form a mother board with a capacitor-embedded layer. In the method for embedding a capacitor into a multi-layer PCB (printed circuit board) disclosed by the invention, the patterns of the capacitor-embedded layer are made by using a single-side etching and two-time lamination process, so that the problems of board clamping and breaking and the like caused if the capacitor-embedded layer is too thin and crisp can be effectively avoided, the cost for making the patterns of the capacitor-embedded layer is reduced, and the qualified rate is improved.

The invention provides a loudspeaker box. The loudspeaker box comprises a shell and a sound production monomer; the shell is provided with a containing space; the sound production monomer is containedin the containing space; the sound production monomer is provided with a bonding pad; the loudspeaker box further comprises a soldering lug; the soldering lug comprises a main body part, an elastic pin and a conductive terminal; the main body part is fixed on the shell by injection moulding; the elastic pin extends from the main body part; the conductive terminal is connected with the main body part; the elastic pin elastically abuts against the bonding pad; and the conductive terminal is electrically connected with an external circuit. Compared with the prior art, the loudspeaker box provided by the invention is as follows: the soldering lug fixed on the shell by injection moulding is connected to the sound production monomer and the external circuit; the steps of soldering, maintainingpressure, painting notch glue and the like can be avoided; compared with assembly, injection moulding is relatively high in fixation precision; the yield of the loudspeaker box is relatively high; a flexible circuit board is replaced by the soldering lug; the cost is reduced; the wire outlet groove of the flexible circuit board is cancelled; the gas leakage problem of the wire outlet groove is completely evaded; the elastic pin of the soldering lug is connected to the sound production monomer; and thus, the sound production monomer also can be contacted with the elastic pin of the external circuit without arrangement of the elastic pin.

The invention discloses an injection moulding method of a digit wheel and a mould thereof. The method comprises the following steps: closing and molding a font front mould and a rear mould, opening the font front mould and the rear mould, rotating a rotating disc of a double-colored injection machine, rotating the rear mould to a second forming position, closing and molding the rear mould and a wheel body front mould, opening the wheel body front mould and the rear mould, pushing a product out, rotating the rear mould to a first forming position, and the like. The digit wheel mould comprises the front mould and the rear mould, wherein the front mould is a font core front mould, and the rear mould is a font core rear mould. By adopting the digit wheel mould, plastic digits on a digital display measuring meter can not be printed on the surface of the product by a rotary printing process any more, but the model product produced by directly adopting the digit wheel mould, therefore, not only the production process for producing the digit display measuring meter is reduced, the cost is saved, but also any pollution to the environment can not be generated, and the mould is very economicand practical.

The invention provides a casting method of movable and fixed vortex casting pieces of a compressor, aiming at solving the technical problem that the movable and fixed vortex casting pieces generate loosing and shrinkage at the hot joint in the casting process. The casting method comprises the following steps: embedding a conformal cold iron into the hot joint of the casting piece at the corresponding position of a core box, then carrying out sand shooting and manufacturing a sand core with the conformal cold iron; and placing the sand core with the conformal cold iron into a casting mold, combining a dead head feeding technique and casting the casting piece. The shape of the conformal cold iron is manufactured into a vortex shape or an arc shape according to the shapes of a vortex sand core teeth and the position of the hot joint of the vortex casting piece. One end of the conformal cold iron is provided with a columnar positioning lag; and the core box is provided with a positioning hole matched with the positioning lag. The sand core is internally provided with the conformal cold iron which is directly applied on the hot joint, thus having fast cooling speed and leading the hot joint position to obtain maximum subcooled temperature in the vortex casting piece. The casting method can effectively solve the defects of loosing and shrinkage of the root part of the vortex teeth.

The invention provides a method for quickly printing a three-dimensional color model. The method comprises the steps of printing a base material model by using a base material, and coloring the exterior of the base material model to obtain a color model. The method specifically comprises the steps of obtaining parameter data of a color model to generate a color diagrammatic figure; analyzing the color diagrammatic figure to obtain a skin layer and a base material model; slicing up the base material model, extracting a layered graph, performing color area cutting on the skin layer, extracting a plurality of monochrome areas, and designing a spraying path for each monochrome area; printing the base material model according to the layered graph, and spraying pigments to color the base material model according to the monochrome area and the spraying paths. The method for quickly printing the three-dimensional color model is beneficial to simplifying the coloring operation of the three-dimensional color model, and improves the coloring quality and efficiency.

The invention relates to an optical fiber composite insulator, comprising a support body, wherein the support body comprises at least one through hole formed on the support body, the through hole is formed along the axial direction of the support body; and the optical fiber composite insulator also comprises at least one optical fiber penetrating through the through hole. Because the support body of the optical fiber composite insulator is provided with the through hole and the optical fiber is arranged in the through hole, a shed and a flange outside an insulating tube can be prefabricated and inserted, and then the optical fiber is fixed, thereby avoiding damaging the optical fiber when the shed is formed at high pressure and high temperature, and improving the percent of pass of the optical fiber composite insulators.

The invention discloses a visual detecting device and an imbedding plate detecting device which uses a visual positioning device. The detecting device is used for searching and positioning the positions of the sub-plate positioning marks of the upper and lower surfaces of an imbedded sub-plate, thereby comparing the position coordinates of the positioning marks of the sub-plate positioning marks so as to find out whether the position coordinates exceed a pre-set value. If the coordinates exceed the pre-set value, the coordinates are abandoned. A position detecting device is used for searching and positioning the position of a positioning mark of a mother board. And the imbedding sub-plate is placed in the containing space of the mother board by a shifting positioning device according to the position of the positioning mark of the mother board.

The invention discloses a 35kV heat shrink power cable intermediate connector manufacturing technology method comprising the following steps that an external sheath, an armor and an internal sheath are cut; cable phase splitting is performed, and excessive cable wire cables are sawed; a copper shielding layer and an external semi-conductive layer are cut; wrapping of stress control glue is performed, and heat shrinkage of a semi-conductive stress control tube is performed; wire core tail end insulation is stripped, a "pencil stump" is cut and sharpened, and an internal semi-conductive layer is reserved; tube material and a copper shielding mesh sleeve are sleeved in turn; crimping of a connecting tube, wrapping of a shielding layer and additional wrapping of an insulating tape are performed; heat shrinkage of internal and external insulating tubes and a shielding/insulating composite tube is performed; wrapping of a waterproof adhesive tape and a semi-conductive tape is performed; the copper shielding mesh sleeve is fixed, and the copper shielding layers of the two ends are connected; three phases are tightened, heat shrinkage of the internal sheath is performed and the armor layers of the two ends are connected; and a metal sheath and an external sheath tube are fixed. The technology method has instructiveness and can give clear processing steps to work personnel so that the manufactured intermediate connector is enabled to be high in percent of pass, excessive waste can be avoided and cost can be saved.

The invention relates to a directly-inserted power semiconductor module test clamp composed of a basic door-style frame structure formed by an upper fixing plate, a supporting rod, and a base plate, a triaxial cylinder disposed on the base plate, a module elevating table fixed to the triaxial cylinder, a positioning plate disposed on the module elevating table, a tested module disposed on the module elevating table and supported by the module elevating table to move up and down, and an electrode clamping and signal sampling mechanism assembly. In view of a characteristic that a directly-inserted module conductive sheet is arranged vertical to the base plate, elastic contact electrodes on the test clamp clamp the electrodes of the module by means of the motion of the test clamp so as to achieve reliable contact and perform testing. Therefore, the directly-inserted power semiconductor module test clamp may prevent the electrodes of the module from damaging and has voltage drop testing and high-voltage testing functions of the tested module with heavy current.

The invention relates to a method for straightening a steel plate. A jack pressure straightener serving as a pressure source is adopted to perform extrusion and straightening on the steel plate; before straightening, two sizing blocks are arranged at proper positions under the steel plate, a cambered washer is fastened on each sizing block, the cambered washer is put on the steel plate, and the sizing block is arranged in a recess at the upper end of the cambered washer; and the jack pressure straightener is started, a pressure head presses downwards and extrudes the sizing block, and the pressure is transmitted to the cambered washer so as to extrude a deformed part of the steel plate. The method has the advantages of convenient use and good straightening effect, and effectively improves the efficiency and the quality of straightening the steel plate.

The invention relates to a scale calibrating device and a scale calibrating method for a hopper scale with hopper or hopper bin horizontal detection. The device mainly comprises a jack, a portal frame, a magnetic level instrument, a magnetic level instrument connection hose, a pressure applying platform, a standard weighing sensor and a weighing display instrument, wherein the lower end of the central position of a horizontal transverse beam of the portal frame is provided with the jack; the jack is vertically arranged on the upper surface of the standard weighing sensor for scale calibrating; the pressure applying platform is arranged below the standard weighing sensor for scale calibrating; and the magnetic level instrument mainly comprises a magnetic base and a plastic pipe with graduations. The jack is used for converting a standard weight needed by electronic scale calibration into mechanical force instead of a weight, the magnitude of applied force is controllable, and the loading is at a uniform speed and is reliable; the magnitude of the applied force is accurately displayed through the standard weighing sensor and the weighing display instrument, so that the accurate metering of mechanical force is realized; and the scale calibrating device has a simple structure and a low price, is suitable for narrow fields, can be used repeatedly, is flexible and convenient for applying, and is convenient to install and use on site.

The invention relates to a quantitative reverse deformation arrangement based method for designing a cast model, in particular to a finite element thermo-mechanical coupling calculated quantitative reverse deformation based method for designing a large cast model. The method comprises the following steps: firstly, establishing a finite element thermal stress model by comprehensively concerning influence of casting solidification, cooling, mold dismantling and cutting of a gating system and thermal treatment; and then, setting different relax coefficients of reverse deformation according to differences of cast structure characteristics and different regional restraint intensities, and carrying out reverse deformation treatment on the original model. The relax coefficients of reverse deformation are determined by stress level of a calculation node, the more the stress value is, the less the relax coefficient is. Aiming at the added model of reverse deformation, numerical simulation and iteration of the whole thermal treatment process are carried out to finally determine a reasonable size of the cast model and produce a uniform cast with proper machining allowance.

The invention provides a method for removing burrs from a combined hole, which comprises the following steps: a crossing point is drilled with a drilling bit to remove burrs at the crossing point. The invention has the advantages that: the method for removing burrs from the combined hole is rapid and highly efficient, saves the manpower cost and increases the qualification rate. Besides, the invention also provides a forming method for the combined hole and forming equipment for the combined hole.

The invention belongs to the field of electric systems, and particularly relates to a voltage-reactive power control method used for a regional power grid. The voltage-reactive power control method carries out practical treatment on an automatic voltage control (AVC) system, and the adjustment to bus voltage and gate power factors, which combines with load forecasting results, meets the inverse voltage regulating principles. The inverse voltage regulation is operated to improve the voltage and the power factors at the load peak, and also is operated to reduce the voltage and the power factors at the load valley peak. The voltage-reactive power control method comprises the following steps of determining the variation trend of short-term system load and ultrashort-term bus load; judging the load variation trend of the AVC system to all the power supply regions; and determining the compression quantity of a gate-reactive control limit and the compression quantity of all side bus control voltage in all the power supply region. The voltage-reactive power control method provided by the invention controls the possible out-of-limit variation in advance according to the power grid operating state and the load variation trend so as to avoid the occurrence of over-limit quantity as far as possible, the qualified rates of bus voltage and gate power factors are fundamentally improved, and the action times of equipment is reduced on the basis.

The invention provides a method for controlling internal defects of steel so that the steel can satisfy the requirement of ultrasonic flaw detection of the diameter of 2mm. The method controls temperature gradients inside and outside a casting blank by adjusting high-pressure water jet descaling parameters and then controls pass reduction so that deformation conditions in a rolled piece are changed, the core defects of the rolled piece are fully welded, and the internal defects of the casting blank are controlled within the diameter of 2mm to satisfy the requirement of the ultrasonic flaw detection of the diameter standard of 2mm. The method can improve the qualified rate of the ultrasonic flaw detection for steel, can reduce rolling passes, decreases the production cost and improves the production efficiency.

The invention discloses a forging method of a single-throw crank shaft. The forging method of the single-throw crank shaft comprises the following steps: a step a of pouring a cylindrical blank material, wherein the cylindrical blank material comprises chemical components, by weight percent: 0.12-0.40% of C, 0.42-1.0% of Mn, 0.7-1.5% of Si, 0.09-0.15% of V, 0.15-0.22% of Ti, 0.4-1.4% of Cr, 0.6-1.5% of Ni, 0.18-0.30% of Mo, 0.4-0.8% of Li, 0.04-0.08% of Nb, 0.18-0.24% of Al, 0.18-0.45% of Mg, no greater than 0.033% of P, no greater than 0.030% of S and the balance of Fe; and a step b of forging, wherein the sep b comprises the following steps: at first, heating the selectively-used cylindrical blank material to an initial forging temperature by adopting an intermediate frequency heating furnace; next, rolling the heated blank material in a cross wedge rolling mill through a cross wedge rolling die into a rough blank and forming shaft rod parts of two ends; subsequently, putting the rolled rough blank in a bending die for bending; and finally, upsetting and extruding the bent rough blank in an upsetting forging concave die in two directions for shaping. With the adoption of a quenching and tempering heat treatment technology for the single-throw crank shaft provided by the invention, the high temperature normalizing and the forging are caused to organically form a continuous production line; and therefore, the defects of the prior art are overcome, the energy resource is saved, the heat treatment quality is improved, the production period is shortened, the production cost is lowered and the radiation pollution to a workshop environment is reduced.

The invention provides an on-line roll grinding method for a carbon jacket hearth roll. According to the invention, for great accretion, temperature of each furnace segment is set to be 20 to 25 DEG C higher than normal temperature, a transitional coil which has been used less than 4 times and has a thickness of 0.5 to 0.7 mm is put in a furnace, tension in the furnace is eliminated, the roll is allowed to revolve for 8 to 12 min in a manner of combined inching after revolution for 4 to 5 min, then heating is carried out so as to control furnace temperature, and the above mentioned procedures are repeated for 3 cycles; for fine accretion, temperature of each furnace segment is set to be 10 to 15 DEG C higher than normal temperature, a transitional coil which has been used less than 4 times and has a thickness of 0.35 to 0.5 mm is put in a furnace, tension in the furnace is eliminated, and the roll is allowed to revolve for 1 to 3 min. According to the invention, accretion in the carbon jacket hearth roll can be rapidly removed; for the fine accretion, it is guaranteed that no accretion occurs any longer within 16 h after removal of the fine accretion; for the great accretion, it is guaranteed that no accretion occurs any longer within 30 h after removal of the great accretion; and therefore, an operating rate of a unit and rolling yield of products are greatly improved, and production cost and energy consumption are reduced.

The invention relates to a thermal insulation brick and in particular relates to a production method for preparing a sintering thermal insulation brick from sludge. The production method for preparing the sintering thermal insulation brick from the sludge comprises the following treatment steps: carrying out previous preparation, drying the sludge, carrying out co-grinding on the sludge, shale and coal gangue, preparing a raw sintering thermal insulation brick from the sludge, carrying out delaying curing on the raw thermal insulation brick on a kiln car, preheating and drying the raw thermal insulation brick, drying the raw thermal insulation brick and firing to obtain the sintering thermal insulation brick by virtue of a roasting tunnel kiln. The production method for preparing the sintering thermal insulation brick has the advantages that the continuous treatment is realized, performances are improved, the product grade is enhanced, the energy is saved and the consumption is reduced.

The invention discloses a manufacturing method of a high-alignment HDI (High Density Interconnection) product. The method comprises the following steps: forming an annular groove in an inner-layer pattern, wherein the annular groove is formed concentrically with a first registration hole, and is used for judging whether the practical position of the first registration hole corresponds to the practical position of the inner-layer pattern or not by judging whether the substantial position of the first registration hole is concentric with the substantial position of the annular groove or not; and repeatedly drilling overlapped boards, aligning the boards through the first registration hole and a second registration hole, and determining the position of a blind hole by taking the first registration hole and the second registration hole as registration points. Through adoption of the manufacturing method, the inter-board alignment of PCBs (Printed Circuit Boards) is effectively enhanced; the yield during board manufacturing is increased; and the enterprise benefit is increased.

The invention belongs to a machining technology, and relates to an improved method for processing the internal spline of a blind hole on the end face of a cylindrical shaft. The method is characterized by comprising the following steps of: processing a technical blind hole on the end face of the cylindrical shaft; manufacturing an internal spline bushing; press-installing the internal spline bushing; and locking the binding face between the internal spline bushing and the technical blind hole of the cylindrical shaft. With the method, no cutter relieving and chip groove is arranged in the blind hole on the end face, the qualification rate of the processed internal spline of the blind hole is high, and the processing cost is low.