52results about How to "Prevent thermal deformation" patented technology

The invention relates to a welding center and method for platform machining, and belongs to the technical field of welding equipment. The device comprises a rack, a gantry frame is slidably mounted on the upper surface of the rack, an air cylinder is slidably arranged at the bottom of a cross beam of the gantry frame, a mounting plate is fixed to the telescopic end of the air cylinder, and a welding head is mounted on the lower surface of the mounting plate; and fixing cylinders are further included, the two fixing cylinders are fixed to the left side and the right side of the lower surface of the mounting plate, and moving plates are slidably connected to the opposite faces of the two supporting vertical plates. According to the device, a single honeycomb platform is automatically clamped through a motor and a wedge block, a guide plate is matched for abutting, an elastic floating roller is matched for pressing, positioning is stable, a workpiece is not damaged, full-area cleaning and negative-pressure synchronous impurity removal are adopted before welding, welding defects are effectively avoided, initial pre-stretching is conducted in the welding process, and the welding efficiency is improved. And then the progressive secondary stretching is realized along with the linkage of the welding machine head, the stress is dynamically eliminated, the deformation is inhibited, and the flatness and the welding precision are greatly improved.

The application relates to a heating element, an atomization device and an aerosol generating system. The heating element comprises: a base body configured to form an atomization channel for accommodating an aerosol generating article; a first heating body arranged at one end of the base body to form a first heating area on a channel wall of the atomization channel, the first heating area being used for heating a medium section; and a second heating body arranged at the other end of the base body to form a second heating area on the channel wall of the atomization channel, the second heating area being arranged adjacent to the first heating area and being used for heating a functional section; wherein the base body is formed of a low-thermal-conductivity material. The heating element can separately control the temperatures of different areas of the base body by using the first heating body and the second heating body, thereby forming a more accurate regional temperature field distribution.

This invention proposes a high-rigidity, high-precision external cylindrical grinding wheel spindle, comprising a housing, a spindle sleeve installed within the housing, and a shaft core rotatably installed within the spindle sleeve, the shaft core being supported by a front bearing assembly and a rear bearing assembly. It also includes a preload structure for applying and adjusting axial preload to the front bearing assembly, thereby enhancing the system rigidity of the shaft core. This invention improves the system rigidity of the grinding spindle by employing a four-section angular contact ball bearing layout at the front end of the spindle, combined with precision grinding of inner and outer spacers or thermal expansion compensation sleeves. This allows the spindle to withstand greater grinding forces and directly guarantees the highest rotational accuracy at the working end. The rear end of the spindle adopts a floating bearing assembly design, which eliminates destructive thermal stress and protects the preset precision preload state of the front bearing assembly, thus ensuring that the spindle maintains high precision throughout the entire temperature rise process.

The application relates to the technical field of high polymer composite materials, and particularly discloses a resin applied to motor rotor carbon fiber winding and a preparation method thereof. The resin comprises the following raw materials: 40-60 parts of a tetrafunctional phenolic epoxy resin, 20-40 parts of a biphenyl type epoxy resin, 15-20 parts of a core-shell rubber, 0.1-0.2 parts of triphenylphosphine, 20-25 parts of a curing agent, 0.5-1 part of an accelerator, 3-5 parts of nano fillers, 1-2 parts of a silane coupling agent and 5-8 parts of an active diluent. The resin prepared by the application has excellent high-temperature resistance and high elongation at break, and can be applied to motor rotor carbon fiber winding.

The utility model relates to PCB board processing technical field discloses a kind of PCB soft board processing heat curing equipment, including the processing box for the storage of PCB soft board, the lower end of the processing box is fixedly connected with the support frame for supporting processing box, hot air component for drying and curing to PCB soft board is installed in the processing box, and placing assembly for fixing PCB soft board is installed between the hot air component. The utility model realizes two-way heating by the hot air disc of symmetry up and down, makes PCB soft board double side synchronous heating, forms uniform temperature field, effectively prevents one-sided heating deformation, improves solvent evaporation and resin curing efficiency, and adopts knob type clamping mechanism cooperation rotation design, so that board material rotates at uniform speed in curing process, realizes three-dimensional heating, eliminates local overheating phenomenon, and heating uniformity deviation is lower, prevents material thermal deformation.

The application provides a bearing seat, an electric spindle assembly and a numerical control machine tool. The bearing seat comprises an outer seat body, an inner seat body, a damping structure and a cooling channel. The outer seat body forms an outer chamber, and the inner seat body is arranged in the outer chamber. A damping cavity is formed between the inner seat body and the outer seat body, and the damping structure is arranged in the damping cavity. The cooling channel is formed in the outer seat body, the inner seat body or the damping structure. The cooling effect and the damping effect are considered, the damping structure improves the support damping between the inner seat body and the outer seat body, and the vibration between the inner seat body and the outer seat body can be absorbed. The cooling liquid is introduced into the cooling channel, the heat generated by the high-speed rotation of the bearing can be taken away, the thermal deformation of the bearing and the bearing seat is prevented, the rotation accuracy of the electric spindle and the stability of the electric spindle operation are improved. The damping structure is formed by injecting a hot-melt glue type material into the damping cavity and solidifying, and the pressure of the damping cavity is not adjustable. The damping structure is formed by injecting metal powder, silicon oil or hydraulic oil into the damping cavity, and the pressure of the damping cavity is adjustable.

This invention discloses a fixture and method for machining and positioning oblique holes in the sidewalls of measuring pipes. The fixture includes a clamping platform and two sets of built-in cooling components. The clamping platform is equipped with a support assembly and a clamping and positioning mechanism. The clamping and positioning mechanism includes fixed and movable clamping components symmetrically arranged on the clamping platform. Each of the fixed and movable clamping components has a centering component at one end facing the other. The two centering components are respectively used to abut against the two ends of the measuring pipe section to achieve self-aligning clamping and positioning of the measuring pipe section. The two sets of built-in cooling components are symmetrically arranged on the two inner sidewalls of the measuring pipe section to be drilled. Each built-in cooling component has a cooling channel inside, which is connected to an inlet pipe and an outlet pipe, respectively. The inlet and outlet pipes are used to circulate cooling medium into the built-in cooling components. The beneficial effects of this invention are: it solves the technical problems of poor positioning accuracy and difficulty in controlling thermal deformation of the pipe body in existing oblique hole machining processes.