31results about How to "Improve hole making precision" patented technology

A locating-plate-based quick installation method for a steel structure roof beam is characterized by comprising the following steps: a, prefabricating a steel structure roof beam (1), b, prefabricating a locating plate (5), c, prefabricating a movable connecting plate (2), and d, hoisting the steel structure roof beam. The locating-plate-based quick installation method for a steel structure roof beam, provided by the invention, has the following advantages: the locating plate and the movable connecting plate are simple in structure, convenient to fabricate, and safe and reliable to use; the accuracy of perforation is improved in roof beam fabrication; quick stress is applied to the roof beam in a backing fixing way for the locating plate, and the objective of achieving advanced unhooking of a crane is achieved with reduced construction cost of an installation project.

The invention provides a robotized spiral hole drilling system. The system comprises a four-degree-of-freedom series robot, a terminal hole drilling unit and a system controller; the system controller respectively control the four-degree-of-freedom series robot and the terminal hole drilling unit to adjust corresponding hole drilling postures, as well as adjusting the aperture of the drilled hole on real time. With the adoption of the robotized spiral hole drilling system, a serial of apertures can be processed through one cutter, and therefore, the link of changing the cutters during drilling hole through the robotized hole drilling system can be effectively avoided, and the processing efficiency of hole drilling can be greatly increased; the system is particularly suitable for hole processing of a workpiece and has a good application prospect.

The invention discloses a helical hole-milling device and method based on a numerical control machine and belongs to the technical field of helical hole-milling processing. The device is based on a helical milling principle and the helical hole-milling is realized through the coordination of a processed knife handle and the numerical control machine, wherein the needed revolution and feed motionsfor hole-making is provided by the numerical control machine, the spin is provided by a pneumatic main shaft and the offset is regulated by a worm gear. The device comprises a pneumatic main shaft fixing mechanism, the pneumatic main shaft and an air feed mechanism thereof and a radial offset mechanism. The device provided by the invention has the advantages of simple structure, convenience and fastness in offset adjustment, reliable performance, high processing precision and wide application range, simplified numerical control programming and obviously improved processing efficiency.

The invention relates to an opening structure and compound hole combined type flexible sound absorbing product. Firstly, wastes and leftover materials of rubber and plastic products are smashed to particles with particle size of 1-1.5 mm; then the smashed rubber and plastic particles are mixed with 802B glue by the weight ratio of 10: 1, and are evenly stirred for 4-5 minutes by a mixer; the mixture is added in a pressing mold according to the ratio of 150 Kg / m3 by the volume of the needed flexible sound absorbing product; the pressure of a mold pressing head is 4 kg / cm2; when the thickness of the needed flexible sound absorbing product is realized through pressing, the pressure of the head is kept for 20-30 minutes; finally, the flexible sound absorbing product formed through mold pressing is taken out, flatly spreads for 24 hours, and is trimmed and packaged after being dried.

The invention is a non-damage hole-making method of continuous fiber reinforced ceramic matrix composite material. The method realizes the process control in the process of making holes through the design and preparation of fiber laying template, continuous fiber laying, matrix filling, and non-damage hole making. At the same time, the structural integrity of the continuous fiber-reinforced ceramic matrix composite is maintained. Compared with the existing subtractive machining hole-making method, it will not cause damage to the continuous fiber and avoid other defects caused by processing. It can make the continuous pore structure The mechanical properties of fiber-reinforced ceramic matrix composites are increased by 10% to 60%.

The invention relates to a laser spiral machining, grinding and drilling compound device and a drilling method. The drilling compound device comprises a laser generator and a high-speed electric spindle arranged in two eccentric holes of an adjusting shaft; the adjusting shaft is supported and installed in an eccentric hole of a revolution spindle through a needle bearing and an angular contact bearing arranged at two ends of the adjusting shaft; the revolution spindle is arranged in a spindle sleeve and is connected with a revolution motor through a belt pulley; the spindle sleeve drives a whole spindle system to accomplish axial feeding in a feeding sliding sleeve; the feeding sliding sleeve is arranged in a feeding base; and an electromagnetic band-type brake and a torque motor are arranged at the end parts of the adjusting shaft and the revolution spindle. The electromagnetic band-type brake firstly locks the adjusting shaft and the revolution spindle, the revolution motor drives the revolution spindle to revolute through the belt pulley, the high-speed electric spindle drives a grinding head to rotate at a high speed so as to grind a hole wall, and a feeding motor drives the spindle sleeve to axially feed through a screw rod so as to accomplish spiral machining, grinding and correcting of a processed hole. According to the laser spiral machining, grinding and drilling compound device and the drilling method provided by the invention, the drilling accuracy is high, the drilling efficiency can be improved, and the processing cost is reduced.

A diamond sleeve grinding cutter suitable for drill sleeve guide comprises a circular drill rod and a guide drill sleeve. The guide drill sleeve is positioned on the middle lower portion of the drill rod and connected with a drill template, the drill rod comprises a threaded handle (1), a 120-degree positioning conical surface (2), a core discharging port (3), a core discharging guide hole (4), a dust chip discharging spiral groove (6), a spiral guide surface (7), a dust chip discharging straight groove (8) and a cutter cutting edge (9) from top to bottom, double cylindrical surfaces are combined to from the guide drill sleeve, and a through hole is formed in a core, so that the drill rod conveniently penetrates the through hole. The diamond sleeve grinding cutter is an integrated cutter, the quality of a machined hole is fine, defects are fewer, hole forming efficiency is high, a composite hole with a large diameter can be machined once, dust cuttings are fewer and almost discharged in the form of material cores, environmental pollution is low, and materials can be repeatedly used.

The invention discloses a method for planning a hole-making process trajectory of a laminated material, which comprises the following steps: 1) dividing the processing process of the laminated material into processing stages such as entry, stabilization, interface, and exit along the axial direction; 2) measuring and sorting out the hole-making accuracy 3) Analyze the variation law of the hole making precision at each stage, and establish the fitting relationship between the hole diameter deviation, roundness and the characteristic parameters of the spiral trajectory; 4) The average value of the axial cutting force is the smallest, and the peak value of the circumferential cutting force is the smallest As the goal, the optimal value of the characteristic parameters of the spiral trajectory is obtained. The invention provides a way to solve the problem of "inverted cone" in the through-hole processing of laminated materials. By analyzing the variation law of the hole-making precision in the key stage of the single-hole processing process, the core goal is to meet the precision level requirements of the export stage, and the spiral movement is carried out. Trajectory planning, and finally realize the optimization of process parameters, which can not only improve the overall hole-making accuracy of the single-hole machining process, but also help reduce the overall cutting force level to prolong the tool life.