65results about How to "Improve the quality of the wall" patented technology

A differential diameter hole drilling method by which through-holes having improved major surface quality are formed in a target material involves drilling a pilot hole having a diameter that is less than the desired diameter of the through-hole and then drilling a through-hole having the desired diameter. The pilot hole forms a channel from which thermal energy produced during laser drilling can diffuse into the environment, thereby reducing the amount of thermal energy diffusing into the surrounding target material matrix and the degree of thermal damage to the heat affected zone of the target material matrix. The pilot hole also forms a channel through which ablated target material may be removed, thereby increasing overall through-hole throughput. Pilot hole formation reduces the thermal energy required to form the remaining portion of the through-hole and thereby results in less thermal damage to the surrounding target material matrix.

Each fin shaft of auxiliary fins passes through each of upper and lower bearing parts in a first wall part. A pair of transmission shafts provided for the upper and lower fin shafts is arranged outside of the first wall part. A cam member is rotationally arranged outside of the first wall part. A fin shaft of a main fin is rotationally supported by the first wall part. The fin shaft of the main fin has an arm and a transmission shaft. The cam member has cam holes in which the transmission shafts of the upper auxiliary fin are fitted, cam holes in which the transmission shafts of the lower auxiliary fin are fitted, and a long hole in which the transmission shaft of the fin shaft of the main fin is fitted.

The invention relates to a high-pressure jet grouting pile hole leading construction integrated device and a construction method thereof. The high-pressure jet grouting pile hole leading constructionintegrated device comprises a jet grouting drilling machine, a high-pressure jet grouting drill rod and a triple pipe, wherein the triple pipe is fixedly arranged at the bottom of the high-pressure jet grouting drill rod, and a down-the-hole hammer is fixedly arranged at the bottom of the triple pipe; and the triple pipe comprises a grout outlet ejector, an inner air outlet ejector and an outer air outlet ejector which are sequentially arranged from inside to outside. The high-pressure jet grouting pile hole leading construction integrated device is simple in structure, convenient to use and practical, the construction technology of combining the triple pipe and the down-the-hole hammer is adopted for the environment of a complex geological layer, and by optimizing construction technical parameters, an obtained pile body is high in strength and good in construction quality. Compared with a traditional high-pressure jet grouting pile construction method, the input mechanical materials are few, the cost is low, construction is safe, and construction is rapid.

The invention provides an earlier direct mounting method for a concealed distribution box of a filler wall. According to the technical scheme, the method comprises the following steps: preparing for construction; selecting a section bar bracket; making and mounting the section bar bracket; mounting the box; mounting inlet / outlet pipes of the box; building the filler wall; forming the wall masonry; after achieving design strength, removing the section bar bracket. According to the earlier direct mounting method for the concealed distribution box of the filler wall provided by the invention, the mounting is convenient, the adjusting is flexible, a large quantity of engineering practices prove that the mounting quality is greatly increased by the technique, and meanwhile, the quality of the filler wall and plastering is effectively increased, the construction is safe and environment-friendly, the construction period is effectively shortened, the cost is reduced, the excellent economic, technical and social benefits are achieved, and the method has positive popularization and application values.

The invention discloses a tool and a method for strengthening friction extrusion of structural member connecting holes, and belongs to the technical field of machining. The friction extrusion strengthening tool comprises three parts of a friction extrusion head, a necking, and a base plate. When the tool is used to strengthen a structural member connecting hole, under the condition of maintaining 0.02-1 mm extruding magnitude of interference between the friction extrusion head and the connecting hole, the friction extrusion head is rotated and is inserted into the connecting hole in uniform speed. After stopping rotation for 2-5 s, the friction extrusion head is pulled out. The rotation speed of the friction extrusion head is 100-1000 rpm, the insertion speed is 0.1-2 mm / s, and pulling-out speed is 0.3-2 mm / s. In the above process, residual compressive stress is formed near the wall surface of the hole, and plastic flow occurs to the material near the wall surface of the hole, and the material has lattice distortion, and dislocation density is increased, so as to realize friction extrusion strengthening on the connecting hole. The tool and the method are mainly used in strengthening of important structural member connecting holes in aviation, aerospace, trains, and ships, and other industries.

The invention discloses a drill bit suitable for hard sandy soil. The drill bit suitable for hard sandy soil comprises a drill bit center assembly, lower cutter bodies, inner cutter bodies, blades, outer cutter bodies, supporting plates and wear-resisting plates, wherein the lower cutter bodies and the inner cutter bodies are fixed to the outer circumferential surface of the lower end and the outer circumferential surface of the lower portion of a drill bit body respectively, the two to six blades are evenly fixed to the outer circumferential surface of the drill bit body in a radial and surrounding mode, the outer cutter bodies are fixed to the lower edges of the blades, two to eight outer cuter bodies are installed on each blade, for all the outer cutter bodies except the outer cutter bodies at the free ends of the blades, the outer cutter bodies on each blade and the outer cutter bodies on another blade are arranged in a cross mode in the rotation position, the blades and the drill bit bodies are fixed through the supporting plates, the wear-resisting plates are fixedly installed on the cambered surfaces of the free ends of the blades, the side faces of the outer cutter bodies at the outermost end and the side faces of the inner cutter bodies respectively, and the lower cutter bodies, the inner cutter bodies and the outer cutter bodies are installed in the directions enabling lower cutter heads, inner cutter heads and the outer cutter heads face the rotation direction of the drill bit body. The drill bit suitable for hard sandy soil has the advantages that the working efficiency can be improved effectively, the combining strength between the cutter heads and cutter handles is high, abrasion of the cutter bodies and the blades is reduced, and the construction quality is guaranteed.

The invention discloses a method of drilling a hole in a PCB, and relates to a production technology of the PCB. The method comprises the following steps of acquiring the thickness parameter at the position of a target hole and completing drilling in each stage according to the thickness parameter, and comprises the following specific steps: in a first stage, drilling from the top surface of the board to the upper surface of a thick copper layer adjacent to the top surface of the board; in a second stage, drilling two adjacent thick copper layers at least once; in a third stage, drilling fromthe lower surface of a thick copper layer adjacent to the bottom surface of the board to the bottom surface of the board, wherein the thick copper layer is a copper layer with the copper thickness being greater than or equal to 2OZ. By the method, according to the condition of the copper layers at the drilled position, the drilling stages are divided by using the thick copper layers as boundary points so as to complete drilling of a through hole step by step, so that selection of drilling tools and setting of drilling parameters according to the thicknesses of the copper layers in different drilling stages are facilitated so as to reduce wear on the drilling tools, and the through hole having good hole wall quality can be obtained and the reliability of a product is improved.

An end point closing wall forming device of an extrusion type underground diaphragm wall comprises a main body (1) and a vibration water spraying device. The vibration water spraying device is fixedly disposed inside the main body (1). The end point closing wall forming device of an extrusion type underground diaphragm wall further comprises a separation device. The separation device is movably sheathed on the outer side of a short edge (11′) of the main body (1). Also provided is a method for operating an end point closing wall forming device of an extrusion type underground diaphragm wall.

An end point closing wall forming device of an extrusion type underground diaphragm wall comprises a main body (1) and a vibration water spraying device. The vibration water spraying device is fixedly disposed inside the main body (1). The end point closing wall forming device of an extrusion type underground diaphragm wall further comprises a separation device. The separation device is movably sheathed on the outer side of a short edge (11′) of the main body (1). Also provided is a method for operating an end point closing wall forming device of an extrusion type underground diaphragm wall.

The invention discloses a light interior partition wall board and a walling method for the wall body. The wall board comprises a wall board body, wherein a groove and a protruding block are arranged on two longitudinal side faces of the wall board body respectively, and the widths of the groove and the protruding block are matched with each other; and the length D2 of the protruding block is 5-10 mm larger than the depth of the groove. According to the light interior partition wall board, the length of the protruding block is larger than the depth of the groove, so that not only splicing and fixing can be carried out, but also a gap can be formed, and during walling, two steps can be performed as follows: first, only the wall body is spliced, and second, grouting is carried out; and not only construction is facilitated, but also the fastness of the wall body is improved.

The invention provides an earlier direct mounting method for a concealed distribution box of a filler wall. According to the technical scheme, the method comprises the following steps: preparing for construction; selecting a section bar bracket; making and mounting the section bar bracket; mounting the box; mounting inlet / outlet pipes of the box; building the filler wall; forming the wall masonry; after achieving design strength, removing the section bar bracket. According to the earlier direct mounting method for the concealed distribution box of the filler wall provided by the invention, the mounting is convenient, the adjusting is flexible, a large quantity of engineering practices prove that the mounting quality is greatly increased by the technique, and meanwhile, the quality of the filler wall and plastering is effectively increased, the construction is safe and environment-friendly, the construction period is effectively shortened, the cost is reduced, the excellent economic, technical and social benefits are achieved, and the method has positive popularization and application values.

The invention discloses a thermosetting resin composition and application thereof. The thermosetting resin composition contains thermosetting resin and inorganic filler, and the inorganic filler is subjected to wrapping treatment by molybdenum alkene disulfide; and on the basis of the total mass of the thermosetting resin composition, the content of the inorganic filler is 10wt%-80wt%. According to the provided thermosetting resin composition, the molybdenum alkene disulfide wraps the inorganic filler, the compatibility of the inorganic filler and a resin system can be improved effectively, and the resin composition which is uniform and stable in dispersion can be obtained without complicated dispersing equipment. Provided prepreg is prepared by dipping the thermosetting resin compositionin a reinforcing material and then drying the thermosetting resin composition, problems about dispersion and settling of a molybdenum compound are solved effectively, and the molybdenum compound can be uniformly distributed in the prepreg. A provided laminated board contains at least one prepreg; and a provided printed circuit board contains at least one prepreg.

The invention discloses a selection and control method of a punching pile protection wall structure material for special geological conditions. During punching in strongly and moderately weathered rock, the protection wall material adopts clay slurry making; during punching in powder sand layers and gravel geological structure layers, the slurry making material is formed by mixing expansive soil with cement, and parameters such as the viscosity and the like of the mixed slurry are controlled strictly; during punching under moderately and weakly weathered geological conditions and in sections having relatively flat pile construction positions, clay, cement and calcined gypsum are mixed to form slurry, and parameters such as the viscosity and the like of the mixed slurry are controlled strictly; the protection wall quality under the different geological conditions is improved, and the construction progress is accelerated.

The invention discloses a dynamic hole cleaning method for an ultra-deep impermeable wall. The method includes the steps that after construction of a trench hole of the ultra-deep impermeable wall iscompleted, the trench hole is cleaned, and a plurality of embedded pipes, a joint pipe and a plurality of pouring conduits are lowered into the trench hole; air pipes for applying air force to the trench hole to be poured with concrete are lowered between the adjacent pouring conduits; and the concrete is poured into the trench hole through the pouring conduits, continuous lifting slurry discharging is carried out on the trench hole poured with the concrete by utilizing the air force applied by the air pipes to synchronously discharge slurry-mixed floccules formed by the upper layer of the concrete in the trench hole and slurry, and then the vertically continuous ultra-deep impermeable wall is formed by the continuously poured concrete. By means of the method, impermeable wall constructioncan be carried out on a river dike with the largest depth exceeding 180 meters, the slurry-mixed floccules and waste residues at the hole bottom are thoroughly removed during impermeable wall construction, the hole cleaning effect is guaranteed, the situation of pipe blockage is avoided, concrete pouring can be continuously carried out, and the phenomenon that the impermeable wall breaks due to cementation and hardening of the slurry-mixed floccules will not occur.

The invention relates to the field of handheld or similar portable drilling machines, in particular to a wall face drilling device achieving circulating water utilization and an application method ofthe wall face drilling device. The wall face drilling device achieving circulating water utilization comprises a water drill (1), and is characterized in that the wall face drilling device further comprises a water collection cover (2), a water inlet pipe (31), a water outlet pipe (32), a water pump (4), a water collection box (5) and a filter screen (51); a shell of the water drill (1) is fixed to a wall face (10) through an expansion bolt; the water collection cover (2) is arranged outside the water drill (1) in a sleeving manner; the water inlet pipe (31) is connected with the water pump (4) and the water drill (1); and the water outlet pipe (32) is connected with the water collection cover (2) and the water collection box (5). The application method of the wall face drilling device achieving circulating water utilization is characterized by comprising the following steps of a, pre-drilling, b, device fixing and c, drilling in sequence. By means of the wall face drilling device andthe application method, water consumption is reduced, mud discharging is reduced, the wall face quality is high, and the environment is protected.