8results about How to "Avoid grinding" patented technology

According to the semiconductor packaging structure and the preparation method thereof provided by the invention, the diffusion barrier layer is formed on the upper surface of the first packaging chip, and the diffusion barrier layer is only ground in the process of grinding and thinning the first packaging layer, so that a Cu metal column and the first packaging chip are prevented from being ground at the same time, and therefore, Cu metal can be prevented from remaining on the first packaging chip; therefore, the first packaging chip is prevented from being polluted by diffusion of Cu metal, and the problems of function failure, such as breakdown voltage reduction and electric leakage, of a chip sensitive to Cu caused by diffusion of Cu metal are avoided.

The present application relates to vertical sand mill technical field, specifically to a kind of closed circulation vertical sand mill, using the stirring tank, feed pump and vertical grinding device communicated in turn, vertical grinding device includes vertical grinding body, overflow shell, driving spindle, static ring, dynamic ring, centrifugal rotor and screen, when using, material is stirred in stirring tank, pumped into vertical grinding device by feed pump, material flows into overflow shell by screen and dynamic ring, without mechanical seal, avoid the problem that material easily leaks by using mechanical seal setting, screen, dynamic ring and static ring are used to prevent grinding medium from entering overflow shell, and grinding medium is thrown to periphery under the action of centrifugal rotor to avoid grinding medium and screen friction and cause screen damage, material is overflowed into stirring tank by the high-low liquid level difference of stirring tank, form closed circulation, ensure the stability of product quality.

The utility model discloses an intergranular corrosion test bending method frock, including testing machine, press bending frock and upper pressure head. Press bending frock contains frock mesa, its upper end is connected two groups of support sliding table, and is equipped with press bending seat on the upper end of support sliding table, and the lower end of side edge is fixed rack piece, and the lower end of mesa is penetrated with driving shaft and driven shaft, and the first gear and second gear are fixed on the shaft respectively, and the end of driving shaft has adjusting handle, and the both sides of mesa are equipped with guide rod support and guide rod. Rotating adjusting handle, driving shaft drives rack piece through gear, makes both sides support sliding table synchronous reverse movement, and guide rod and sliding groove ensure the moving accuracy, realize the accurate alignment of support center and upper pressure head. The semicircular smooth surface of press bending seat avoids sample grinding. This frock solves the problem of big traditional manual adjustment error and low efficiency, and the support spacing adjustment error is less than or equal to 0.1mm, and is convenient to operate, is applicable to different specifications sample, and improves intergranular corrosion test precision and efficiency.

This invention discloses a nuclear magnetic resonance (NMR) method for measuring the solid phase deposition of crude oil in porous media, belonging to the field of oil and gas reservoir development technology. By using a single saturation of crude oil in a core sample and leveraging the characteristics of online NMR technology, the method employs a comparison of experimental and NMR measurements, along with a 1:1 standard line reference, to determine the standard echo interval T in the transverse relaxation time T2 measurement acquisition parameters. E This method directly measures the amount of solid phase deposition in pore fluids in situ, solving the technical problems of existing technologies that cannot maintain the original characteristics of the sample, effectively avoid the interference of solid skeleton response and solid phase deposition particles, and are difficult to measure the solid phase deposition content of active oil in situ. It achieves the technical effect of rapid, efficient and accurate measurement of the amount of crude oil solid phase precipitation in cores under specific temperature and pressure conditions. The method is reliable in principle, simple to operate and highly applicable, and the test results are accurate and reliable, making it more suitable for the fine characterization needs of complex oil and gas reservoirs.

The utility model relates to the technical field of ball mills, one embodiment of the utility model provides a ball mill for stone raw material grinding, the ball mill comprises a ball milling barrel and a driving mechanism, the driving mechanism is used for driving the ball milling barrel to rotate, the ball mill further comprises a collecting outer barrel, a filtering mechanism and a discharging assembly, and the collecting outer barrel is rotationally arranged outside the ball milling barrel in a sleeving mode; the filtering mechanism is arranged on the side wall of the ball-milling cylinder and used for outwards filtering and discharging the ground stones which can pass through the aperture of the filtering mechanism into the collecting outer cylinder, and the discharging assembly is arranged on the collecting outer cylinder and used for discharging the ground stones. The technical problems that in the prior art, due to the randomness of the motion trail and the collision mode of steel balls in a ball mill, some stones are collided and ground too many times, some stones are not ground, and secondary machining needs to be conducted are solved.

The invention relates to the technical field of optical glass lens cutting, in particular to an optical glass lens multi-wire cutting device and method.The optical glass lens multi-wire cutting device comprises a mounting shell, a cutting platform is fixedly connected to the lower portion of one side of the mounting shell, a first motor is fixedly mounted at the top of the mounting shell, and a wire winding barrel is fixedly connected to an output shaft of the first motor; the surface of the wire winding cylinder is connected with a wire positioning mechanism; the diamond wire is guided in a multi-section mode through the guide wheels at the two ends of the multiple installation frames, optical glass lenses are cut in a multi-section mode, and therefore the cutting efficiency of the optical glass lenses is improved, the distances between the multiple installation frames are synchronously adjusted through the action of the distance adjusting mechanism, and the cutting efficiency of the optical glass lenses is improved. The distance between the multiple sections of the diamond wire can be synchronously adjusted according to the cutting thickness, and the cutting flexibility degree is improved.

This utility model relates to a vertebral anchoring and positioning reaming device, comprising: a working sleeve, which includes a sleeve body and a first cylindrical channel disposed within the sleeve body and extending axially; the lower end of the sleeve body has an arc-shaped serrated structure surrounding the end face of the first cylindrical channel; and an eccentric reamer for insertion within the first cylindrical channel, comprising a cylindrical drill rod, a second cylindrical channel disposed within the drill rod, and a drill bit disposed at the lower end of the drill rod and connected to the second cylindrical channel; the second cylindrical channel and the central axis of the drill rod are not on the same straight line. Compared with the prior art, this utility model has advantages such as reliable anchoring and precise bone removal.

The invention relates to the field of speed reducers, and discloses a composite push rod type oscillating tooth speed reducer with a double uniform load structure, which comprises a wave exciter assembly, an oscillating tooth frame assembly, an inner gear ring assembly and a plurality of composite push rod type oscillating tooth assemblies. The oscillating tooth assembly comprises a deformable push rod made of a low-elasticity-modulus material, a first semicircular groove and a second semicircular groove are formed in the two ends of the deformable push rod respectively and used for containing tooth top and tooth bottom roller pins to form a double-arc-surface sliding pair, the side face of the deformable push rod and an oscillating tooth frame radial groove form plane sliding contact, and friction loss is remarkably reduced. Linear contact rolling friction is formed between the roller pins, the tooth shape of the inner gear ring and the outer ring of the shock wave device, and the transmission efficiency is improved. The inner gear ring is of a thin-wall steel annular tooth profile and engineering plastic base body composite structure, controllable radial elastic deformation is generated under the action of meshing force of the multiple movable teeth, and second heavy loads are evenly distributed. According to the design, high-precision, high-efficiency and low-cost precision speed reduction transmission is realized through cooperation of material elastic deformation and a structure.