86 results about "Hole size" patented technology

The utility model relates to the technical field of mining blasting, in particular to a mining blasting hole cleaning device which comprises a fixing plate, a fixing rod is fixedly connected to the bottom of the fixing plate, a connecting cylinder is arranged on the outer surface of the fixing rod, a rectangular groove is formed in the outer surface of the connecting cylinder, and an adjusting plate is connected to the inner wall of the rectangular groove in a clamped mode. A butt joint plate is fixedly connected to the side face of the adjusting plate, a circular groove hole is formed in the outer surface of the butt joint plate, and a spring is fixedly connected to the inner wall of the circular groove hole. According to the mining blast hole cleaning device, through the arrangement of the fixing rod, the connecting cylinder, the adjusting plate, the butt joint plate, the spring, the butt joint ball and the cleaning brush, during use, when dust on the inner wall of a blast hole cannot be sucked away, a worker can adjust the length of the adjusting plate on the inner wall of the connecting cylinder according to the size of the hole, and the dust on the inner wall of the blast hole cannot be sucked away; the butt-joint plate on the adjusting plate can move on the inner wall of the connecting cylinder, and the butt-joint balls on the butt-joint plate can be clamped in the clamping grooves in the inner wall of the connecting cylinder.

The preparation method comprises the following steps: firstly, pretreating the surface of an aluminum plate, then uniformly mixing and stirring a skeleton structure, a cross-linked structure, a tethered structure and a lubricating liquid, then adding a catalyst, stirring for a proper time, spin-coating the pretreated aluminum plate with the mixture, and heating and curing. The content proportion of the tether structure has great influence on the anti-ice-dredging effect, the tether structure plays a role in integration of a loose network and slow consumption, the hole size in a coating cross-linked network is adjusted, the elastic modulus is adjusted, and the mechanical performance of the coating is changed; one end of the coating is connected with a cross-linked network, and the other end of the coating is freely relaxed, so that the anti-icing performance of the surface is improved. Meanwhile, due to the existence of the lubricant in the cross-linked structure, the coating has solid-liquid synergistic effect anti-icing performance, so that the coating prepared by the method has good mechanical performance and durable anti-icing performance.

The invention discloses a device and a method for detecting small hole parts in the technical field of part detection. The small hole type part detection device comprises a marble damping platform, a double-coordinate displacement platform, a to-be-detected part fixing assembly, a visual detection mechanism and a contact type measurement mechanism. The double-coordinate displacement platform can move on the marble damping platform in the X-Y direction. The to-be-detected part fixing assembly is arranged on the double-coordinate displacement platform and used for obliquely fixing a to-be-detected hole part, the visual detection mechanism is installed on the marble damping platform and used for visually detecting the to-be-detected hole part, and the contact type measuring mechanism is installed on the marble damping platform and used for measuring the to-be-detected hole part. And measuring the contour data of the in-hole chamfer of the to-be-measured hole part and the perpendicularity of the to-be-measured hole part. The roundness and the coaxiality are measured through non-contact measurement. The device can solve the problem that a contact type measuring device cannot be used for measuring the chamfer due to the fact that the hole size of a hole part is long and narrow, and meets the requirement for integrated detection of all positions of the part.

The application discloses a method for determining the quality proportion of each grade based on the maximum utilization rate of cement gobi material, and belongs to the technical field of cement stabilized base. Firstly, the aggregate with a particle size greater than the maximum screen hole of a target grading is removed from the original gobi material, and the passing rate is normalized. According to the particle size from small to large, when the normalized passing rate B a of the first determined screen hole p a is not within the range of the set upper limit and the set lower limit of the passing rate, the first grade is set. The passing rate of each screen hole is corrected. According to the particle size from small to large, when the once corrected passing rate B b of the first determined screen hole p b修正1 is not within the range of the set upper limit and the set lower limit of the passing rate, the second grade is set. The passing rate of each screen hole is corrected. The grading is continued or stopped. The quality proportion of each grade is determined. The application can quickly determine the grading screen hole size with the maximum utilization rate of gobi material and the quality proportion of each grade under the condition that the specification requirements of the mixture grading are met.

The utility model discloses a punching rod for inner hole sizing burnishing forming, which belongs to the technical field of cold heading forming processing, and comprises a material passing burnishing punching rod, the material passing burnishing punching rod comprises a rod body and a material passing head, the material passing head is arranged at the front end of the rod body, the material passing head comprises a transition part, a burnishing part and a material passing end, the transition part is connected with the rod body, and the burnishing part is connected with the material passing end. The burnishing part is arranged at the front end of the transition part, and the material passing end is arranged at the front end of the burnishing part; the diameter of the burnishing part is larger than that of the material passing end, and the burnishing part is in smooth transition design between the material passing end and the transition part. The hole broaching device is simple in structure and convenient to use, can eliminate steps left in a hole during hole broaching, ensures that the diameter of an inner hole of a part is within a tolerance range after material passing and burnishing, ensures that the inner surface of the machined hole is smooth and the size of the inner hole is more stable due to the smooth transition design of the two ends of the burnishing part, improves production efficiency, reduces the procedure of secondary machining after cold heading, and reduces production cost. And the production cost is reduced.

The utility model discloses a pump body of a vertical high-speed pump capable of being quickly replaced. The pump body comprises a pump body main body, a diffuser and a flow guide sleeve, a stepped assembly cavity is formed in the inner wall of the pump body, and the diffuser and the flow guide sleeve are sequentially assembled in the assembly cavity from top to bottom. The inner wall of the diffuser is provided with a main impeller cavity, and the inner wall of the flow guide sleeve is provided with an inducer cavity. The pump body is divided into a plurality of parts such as the pump body main body, the diffuser and the flow guide sleeve, and materials and inner hole sizes of the diffuser and the flow guide sleeve can be selected, processed and manufactured according to different working conditions, so that the function that the pump body of the same model can cope with different working condition parameters is realized; moreover, when the interior of the flow passage component of the pump body is corroded and abraded, only damaged parts need to be disassembled and replaced, so that the production and manufacturing time and the production cost are greatly reduced.

The utility model discloses a screening device for product granularity in titanium sponge crushing production, which comprises a base, a screening shell, a motor and a drum screen, the drum screen with adjustable screen hole size is arranged in the screening shell, and the motor drives the drum screen to rotate; particularly, an adjusting mechanism is arranged at one end of the screening shell, adjustment of the relative position between a shielding plate and a screening plate on the rotary screen is achieved through cooperation of a tooth block, a tooth sleeve, a push ring and other components, and therefore the size of screening holes is changed, and the screening requirements of different particle sizes are met. Meanwhile, impurities and particles which do not meet the particle size requirement are effectively collected through the design of the slag discharging groove; the vibrating screen is compact in structure and convenient to operate, improves screening efficiency and product purity, and has wide application prospects and remarkable economic benefits.

The utility model relates to the technical field of inner hole grinding equipment for improving the roughness and cylindricity of an inner hole, in particular to an inner hole grinding tool for improving the roughness and cylindricity of the inner hole, which comprises an adapter rod, a base is fixed at the end part of the adapter rod, a plurality of groups of grinding components are arranged on the outer wall of the base in a sliding manner, and the grinding components are arranged on the adapter rod. The grinding assembly can move in the direction perpendicular to the center line of the adapter rod, the grinding assembly comprises an oilstone sleeve and at least two guide columns, the guide columns are connected with the base in a sliding mode, the ends of the guide columns are fixedly connected with the oilstone sleeve, and grinding oilstone is fixed to the end, away from the adapter rod, of the oilstone sleeve. The inner hole grinding tool is high in structural adaptability, the inner hole grinding tool can adapt to workpieces with different inner hole sizes by replacing components such as the spring and the guide column in the tool, the inner hole grinding tool is wide in applicability, the number of the inner hole grinding tool is reduced, and the machining cost of parts is reduced.

The utility model discloses a kind of shallow circular silo roof inclined roof can be turned over and shrink circular hole protection device, belong to grain storage technical field, including protective frame, the upper surface of the protective frame is installed with protective net, two skeletons are installed in the protective frame lower, the both sides of the skeleton are fixedly connected with connecting plate, connecting block is fixedly connected under the connecting plate.In the utility model, first, each section keel is formed frame by axis pin bolt staggered insertion, forms whole with protective frame and protective net, after whole is placed in alignment hole, it is rotated by four lateral rotating discs, drives screw rod to rotate in connecting block, simultaneously drives antiskid pad to move, makes it tightly presses in hole inner wall, realizes the steady fixation of exempting from punching;Limit baffle is used to ensure that the assembly of each component of skeleton is in place without deviation, the device can be adjusted according to different hole size, install quickly, can be reused, suitable for short construction cycle, operation space is limited inclined roof scene.

The invention discloses a throttling device and a hydrogen cycle test device for a gas cylinder plastic liner material, and relates to the technical field of adjusting systems. Comprising a throttling device body; a cavity channel for air circulation is formed in the throttling device body; one end of the cavity is hermetically communicated with the air inlet pipeline, and the other end is hermetically communicated with the air outlet pipeline; a throttling hole module is installed in the cavity channel. The throttling hole module is hermetically connected with the inner wall of the cavity; a throttling hole is formed in the throttling hole module in the gas circulation direction in a penetrating mode. According to the throttling device and the hydrogen cycle test device for the gas cylinder plastic liner material, the pressure relief rate can be accurately controlled, and the accuracy and the stability of an experimental result are ensured; different pressure relief rate requirements can be met by replacing different types and numbers of throttling hole modules in the throttling device, the throttling characteristic of the throttling device is uniquely determined by the sizes of the precisely machined throttling holes in the throttling hole modules, mechanical abrasion does not exist, repeatability is higher, and the service life is longer.

A kind of PTFE material printed board hole burr removal device and method, including lifting mechanism, rotating mechanism is installed on lifting mechanism, lifting mechanism is equipped on the output of two-dimensional linear XY translation table, to make lifting mechanism move in plane, lifting mechanism is used to drive rotating mechanism to move in Z direction, rotating mechanism is equipped with first removal piece, the lower end of first removal piece is equipped with second removal piece, first removal piece is used to remove the burr of the inner wall of hole with diameter greater than 2mm, second removal piece is used to remove the burr of the inner wall of hole with diameter less than 2mm, and the method for removing burr in hole by the device, the control of removal process is carried out by first automatic control system, to improve the efficiency and automation degree when removing burr in hole.The second burr processing mode of the present application is through two sets of schemes, to select reasonable removal mode for hole size, to ensure that burr removal can be completely and thoroughly completed.

The utility model provides solid granule screening equipment, which relates to the technical field of screening equipment and particularly comprises a screening box, a material conveying box is fixedly mounted on one side of the screening box, a material conveying groove matched with the material conveying box is formed in the screening box, and a plurality of screening plates are slidably connected into the screening box. And rotating rods are fixedly installed on one sides of the bottoms of the multiple screening plates, the multiple rotating rods are inserted into the screening box and rotationally connected with the screening box, the multiple screening plates are each provided with two telescopic structures, and each telescopic structure is composed of a plurality of sliding plates, a long supporting plate, a short supporting plate and an I-shaped connecting rod. Components on the sieve plate can be driven to change relative positions through the telescopic action of the telescopic structure, so that the screening hole diameter is flexibly adjusted, the sieve plate does not need to be replaced when screening requirements of particles in different particle size ranges are met, the size of the sieve holes can be adjusted only by controlling the telescopic structure, and the screening efficiency is improved. And the universality and the use convenience of the equipment are effectively improved.

The application discloses a manufacturing method of a thin-wall gold cavity with a special-shaped slot hole, and comprises the following steps: a subtractive manufacturing method and an additive manufacturing method are combined, a mandrel is processed by using a subtractive process, a polymer transition layer is grown by using a polymer 3D printing additive process, a gold layer is prepared by using a chemical electroplating or sputtering process, the excess polymer transition layer and the gold layer are removed by using a subtractive process, and finally, the polymer transition layer and the mandrel material are removed by using physical and chemical methods, so that the thin-wall gold cavity with the special-shaped slot hole structure can be obtained, and the demand of physical experiments in the field of inertial confinement fusion on the thin-wall gold cavity part with the special-shaped slot hole structure is met. The manufacturing method of the thin-wall gold cavity with the special-shaped slot hole can obtain the thin-wall gold cavity with the special-shaped slot hole structure with a minimum scale, has the advantages of a wider processing scale, no limitation on the structure by the subtractive manufacturing process and high processing efficiency of the transition layer compared with the method for manufacturing the slot hole or the transition layer by using the traditional subtractive method, and the minimum slot hole size is less than 5 microns.

The invention belongs to the technical field of mold design, and discloses a lightening hole design method, device and equipment and a storage medium. The method comprises the steps that a mold design drawing of a mold is obtained, a mold wall face needing to be provided with a lightening hole is selected from the mold design drawing, and the lightening hole is formed according to preset lightening hole size and shape data; offsetting, projecting and stretching the front contour line and the back contour line of the mold wall surface to determine and obtain a lightening hole opening body, and performing Boolean differencing on the basis of the mold wall surface and the lightening hole opening body to generate a lightening hole; through the method, the design efficiency of the lightening holes can be improved.

This utility model discloses a rotary screening machine with a separating mechanism, relating to the field of screening machine technology. The utility model includes a tank body with two feed inlets connected to the upper part. A tank door is rotatably connected to the outer surface of the tank body. The lower part of the tank body is arc-shaped, and an anti-clogging device is fixedly connected to the bottom end of the tank body. A screening device is fixedly connected inside the tank body. The output end of a first motor extends into the tank body and is fixedly connected to a first rotating shaft. Multiple screen plates are fixedly connected to the inner wall of the tank body, each screen plate having holes, with the hole size decreasing from top to bottom. Multiple scrapers are fixedly sleeved on the outer surface of the first rotating shaft. A support plate is fixedly connected to the lower part of the tank body, and the bottom end of the first rotating shaft is rotatably connected to the support plate. This utility model can classify materials of different particle sizes after screening through multiple screen plates, and can avoid material blockage and accumulation.

The present application relates to the technical field of composite material molding, and particularly relates to a chopped fiber prepreg molding method containing photonic crystal interference sheets and a molded product thereof. The present application locks the gel time at the molding temperature by curing the prepreg, and completes multiple exhausts within the gelation window after the mold is closed and before the mold is opened, and cooperates with segmented pressurization, so that the gas is fully released before the channel is closed. The method significantly reduces the porosity and hole size of the product, improves the density and appearance uniformity, and takes into account the structural strength and optical effect.

This invention belongs to the field of engineering machinery technology, and particularly relates to a multi-condition bucket and excavator. The main frame of the bucket includes a top plate, a main cutting edge plate, and two side plates disposed on both sides of the top plate. The two ends of the main cutting edge plate are respectively connected to the two side plates. Several outer ribs are arranged between the two side plates, with one end connected to the top plate and the other end connected to the main cutting edge plate. A grid hole is formed between adjacent outer ribs. An installation cavity is provided on the outer rib, and an inner rib plate slidably connected to the outer rib is arranged within the installation cavity. Several support rods are disposed between the two side plates, and the inner ribs are slidably connected to the support rods. The size of the grid hole opening can be adjusted or closed by sliding the inner ribs, thus enabling the bucket to be used for both loading and filtering materials. Furthermore, the grid hole size is adjustable to meet the filtration requirements of different particle sizes.

The utility model discloses a nut inner hole machining feeding device, which relates to the technical field of part machining and comprises a back plate, a telescopic cylinder is fixed at the bottom end of the side wall of the back plate, an extrusion rod is fixed at the telescopic end of the telescopic cylinder, a top plate is fixed at the position of the back plate above the telescopic cylinder, and an L-shaped foundation rod is fixed at the bottom of the top plate. During material taking, the moving mechanism drives the two clamping plates to penetrate through inner holes of nuts, then the telescopic air cylinder works to drive the extrusion rod to be inserted between the two concave surface rollers, the concave surface rollers are extruded through the conical surfaces of the extrusion rod, the two clamping plates are stretched and expanded through the elastic pieces, and the two clamping plates are clamped through the elastic pieces. And the two clamping plates can expand and clamp the nuts, so that the nuts can be smoothly taken down from the material frame, and nuts with different inner hole sizes can be taken and used according to the length of the end part of the extrusion rod penetrating through the concave roller, so that the material frame has better practicability.

The application discloses a method for determining the quality proportion of each grade based on the maximum utilization rate of cement gobi material, and belongs to the technical field of cement stabilized base. Firstly, the aggregate with a particle size greater than the maximum screen hole of a target grading is removed from the original gobi material, and the passing rate is normalized. According to the particle size from small to large, when the normalized passing rate B a of the first determined screen hole p a is not within the range of the set upper limit and the set lower limit of the passing rate, the first grade is set. The passing rate of each screen hole is corrected. According to the particle size from small to large, when the once corrected passing rate B b of the first determined screen hole p b修正1 is not within the range of the set upper limit and the set lower limit of the passing rate, the second grade is set. The passing rate of each screen hole is corrected. The grading is continued or stopped. The quality proportion of each grade is determined. The application can quickly determine the grading screen hole size with the maximum utilization rate of gobi material and the quality proportion of each grade under the condition that the specification requirements of the mixture grading are met.

To provide a base plate and so on that excel in shear strength.SOLUTION: A base plate 3 has anchor bolt holes 7 as open holes arranged in the vicinity of the four corners. One end of a column 5 is connected to the top surface of the base plate 3. The anchor bolt hole 7 consists of a small-diameter part 9a being a hole with a relatively small diameter and a large-diameter part 9b being hole with a relatively large diameter. The small-diameter part 9a is formed in the top surface side of the base plate 3 while the large-diameter part 9b being formed in the bottom surface side of the base plate 3, that is, the anchor bolt hole 7's diameter is different in size between the upper part and the lower part.SELECTED DRAWING: Figure 2

According to the tissue chip mold, a plurality of circular through holes are formed in the bottom of a first embedding mold box, the diameter of a cylindrical bolt corresponds to the inner diameter of each circular through hole, and the internal size and shape of a mold box bottom support correspond to the external size and shape of the first embedding mold box and the external size and shape of a second embedding mold box; the cylindrical plug pin is used for being inserted into the circular through hole of the first embedding mold box, the mold box bottom support is used for bearing the first embedding mold box in which the cylindrical plug pin is inserted, so that a paraffin model is poured in the first embedding mold box, and the second embedding mold box is used for bearing a paraffin model filled with a tissue sample, so that the paraffin model and the tissue sample are integrated. The hole size and arrangement position of the blank wax block can be selectively arranged through the embedding mold box and the cylindrical bolt, random arrangement can be conveniently carried out according to actual requirements, the structure is simple, use is convenient, the precision is higher than that of manual punching, and the cost is far lower than that of punching controlled by a small milling machine or CNC.

The present application relates to the technical field of component welding, and provides a spot welding device for electronic components, which comprises a moving table, a welding gun provided on the moving table and having a welding gun head, the welding gun head being annular, having a blanking passage in the middle, the lower end of the blanking passage having a blanking port, and one side of the blanking passage further having a feeding port, a welding wire feeding assembly provided on the moving table and used for feeding welding wire, a welding wire cutting assembly provided on one side of the welding wire feeding assembly and used for cutting welding wire segments, and a material guiding piece provided on one side of the welding wire cutting assembly and used for guiding the welding wire segments cut by the welding wire cutting assembly to the feeding port. The spot welding device for electronic components provided by the present application can adjust the length of the welding wire segments according to actual welding requirements by using the welding wire feeding assembly and the welding wire cutting assembly, and when facing various pin and through-hole sizes on the same circuit board, the feeding amount can be automatically adjusted without frequent manual intervention, the consistency and accuracy of the feeding amount are ensured, and the production efficiency is improved.

The present disclosure relates to a BIM-based special-shaped hole management method. The method comprises: determining a range for generating a special-shaped hole in a BIM model; generating a special-shaped hole list in the range; wherein the special-shaped hole list includes the type, number, hole size, and elevation of each special-shaped hole. The above technical solution of the present application can facilitate personnel to understand the number of special-shaped holes used in the construction project, and can facilitate the management of special-shaped holes in the construction project.

A system and method for detecting high aspect ratio micro-holes using optical frequency doubling technology, wherein the micro-hole includes, but is not limited to, a through silicon via (TSV), a through-glass via (TGV), and a through-SiC via (TSiCV). Scanning a fundamental frequency light of a specific wavelength along the axis of the micro-hole to generate strong interface-enhanced frequency-doubled signals at an interface between the micro-hole and another material, (including, but not limited to, air), thereby obtaining a micro-hole geometric structure image characterized by high resolution and visualization, wherein the micro-hole geometric structure image exhibits a high-intensity and distinct interface-enhanced frequency-doubled signal along the contour of the micro-hole, thereby enabling direct visualization of the micro-hole morphology and assessment of the structural quality of the micro-hole. Furthermore, the frequency-doubled signal can be further analyzed to perform high-precision measurement of the hole size, shape, surface roughness, defects, and cracks, which are applicable to process monitoring and quality control of high aspect ratio micro-holes.

The invention belongs to the technical field of material conveying, and particularly relates to a side feeding material dispersing and conveying device which comprises a conveying bin and a dispersing box, one side of the upper end of the conveying bin communicates with and is fixedly connected with a discharging hopper, a spiral blade is rotationally arranged at one end of an inner cavity of the conveying bin, and one end of the conveying bin communicates with one side of the dispersing box; a dispersing plate is fixedly connected to one side of an inner cavity of the dispersing box, a plurality of dispersing holes are formed in the dispersing plate, and a hole size adjusting assembly is further arranged on the dispersing box. By means of the dispersing plate, materials can be divided into small streams after being discharged from the end of the conveying bin, so that the materials are evenly scattered, single-point accumulation is avoided, and the conditions of local overheating, insufficient reaction or packaging weight deviation caused by uneven accumulation of the materials in receiving equipment are avoided.

The invention discloses a differential shell topology casting composite process adopting hot spot segmentation, which belongs to the technical field of differential shell processing, and comprises the following steps: establishing a differential shell casting blank 3D model based on the actual structure size of a differential shell, a large-wall-thickness area, needing to be subjected to through hole machining subsequently, of the differential shell is determined on the casting blank 3D model; secondly, reserved holes are formed in the positions, corresponding to follow-up through hole machining of the differential mechanism shell, of the casting blank 3D model; 3, a pouring process electronic file is designed, pouring simulation software is used for conducting simulation pouring on the casting blank 3D model with the reserved hole, the structure is analyzed and optimized, a differential shell sand mold is manufactured through 3D printing equipment, the stability and reliability of the sand mold are manufactured and verified in a small batch mode, and the final size of the reserved hole and the corresponding casting blank 3D model are determined; through structural optimization, the defects of shrinkage cavities, shrinkage porosity and the like are eliminated, and the yield and reliability of products are improved.

A device and method for removing burrs in holes of a PTFE material printed board comprises a lifting mechanism, a rotating mechanism is installed on the lifting mechanism, the lifting mechanism is arranged at the output end of a two-dimensional linear XY translation table so that the lifting mechanism can move in a plane, the lifting mechanism is used for driving the rotating mechanism to move in the Z direction, a first removing piece is arranged on the rotating mechanism, and a second removing piece is arranged on the first removing piece. A first removing part is arranged at the lower end of the automatic control system, a second removing part is arranged at the lower end of the first removing part, the first removing part is used for removing burrs on the inner wall of a hole with the diameter larger than 2 mm, and the second removing part is used for removing burrs on the inner wall of a hole with the diameter smaller than 2 mm. Therefore, the efficiency and the automation degree when burrs in holes are removed are improved. According to the method, two schemes are adopted for burr treatment, a reasonable removal mode is selected according to the aperture size, and it is ensured that burrs can be completely and thoroughly removed.

The application provides a method for machining an elongated hole in a machining center to ensure the shape and position tolerances of the elongated hole, which adopts a coarse and fine combined mode to machine the elongated hole according to the size and depth of the elongated hole. In the coarse machining, a centering drill is selected to determine the coarse reference position, so that the tool is prevented from breaking and the surface roughness in the hole is ensured to establish an accurate reference for subsequent machining; in the fine machining, different types of tools are selected to perform combined cutting according to the different effects of the tool edges participating in cutting, so that the tool is protected, the tool breaking phenomenon is not prone to occur, the service life of the tool is ensured, and the size accuracy and position accuracy of the machined hole are ensured; in the final forming machining, a drill reamer is selected to perform machining, so that the hole diameter size is ensured and the roughness in the hole is ensured.

The application discloses a kind of based on close packing model's concrete low carbonization mix proportion design method, including according to the maximum particle size and the minimum particle size in close packing model obtains the cumulative percentage under each sieve hole;According to the cumulative percentage of each sieve hole size, the volume proportion of each sieve hole size aggregate is obtained, and the mass proportion of corresponding particle size aggregate is obtained;The total specific surface area of the aggregate model is calculated;Combining volume method and specific surface area method, the amount of sand and stone in concrete is calculated;The volume of paste in concrete is calculated from the mass of sand and stone;Initial water-binder ratio is calculated according to the calculation method of ordinary concrete mix proportion design regulation;When mixed with admixture, the water consumption of concrete is calculated;According to the apparent density of each cementitious material and water consumption, the specific amount of each cementitious material is determined;Further realize the mix proportion design of concrete low carbonization, ensure that the performance of concrete is excellent, while achieving the purpose of green environmental protection, energy saving and carbon reduction of concrete.

This invention discloses a flange machining hole size measuring device and method, belonging to the field of flange machining technology. The flange machining hole size measuring device includes a mounting base, and further includes: a positioning measuring mechanism, which is mounted on the mounting base and used to position and measure the flange dimensions; a base, coaxially arranged with the mounting base, and a first elastic telescopic rod rotatably arranged between the base and the mounting base; and multiple abutment plates, evenly arranged circumferentially on the base, with the side of the abutment plate facing away from the mounting base abutting against the flange. This invention completes the detection of inner and outer diameters, bolt hole diameters, roundness, and hole position consistency in a single clamping operation, eliminating the cumulative errors of traditional multi-point independent adjustments and improving measurement efficiency and accuracy.