113results about How to "Solve thermal deformation" patented technology

The invention discloses a high-power laser wave front measuring instrument and a wave front measuring method, and solves the problems of single-beam laser wave front analysis and phase difference measurement of two arbitrary beams of laser in multi-beam high-power laser coherent combination. The measuring instrument comprises a mechanical shutter, a light beam sampling reflecting mirror, a laser compressing optical system, a transmission-type attenuator, a reflection-type attenuator, a Hartmann wave front analyzer, a phase difference detecting charge coupled device (CCD) camera, and a computer. When the measuring instrument works, the mechanical shutter is opened only during the wave front measurement. The measuring method includes the steps of using the Hartmann wave front analyzer for measuring the wave front of each single-beam laser and simultaneously using the phase difference detecting CCD camera for recording the light distribution of each single-beam laser; taking one single-beam laser as a reference, opening other beams of laser in sequence to interfere with the referential laser respectively; using the phase difference detecting CCD camera for measuring the light intensity of each two beams of laser after the coherent combining so as to obtain phase differences of each beam of laser relative to the referential laser; and using the Hartmann wave front analyzer for measuring the wave front of the laser after the coherent combination.

The invention discloses a manufacturing method for a high polymer material three-dimensional product. According to the method, a blank of the three-dimensional product is obtained through an additive manufacturing method or a mold forming method firstly, and the base materials of the blank comprise mixed high polymer materials and conductive materials. Secondly, the blank is put in an electromagnetic environment, the blank is heated until the high polymer materials are fused through an electromagnetic induction method, and the high polymer materials are fused and soak the other materials in the blank. Afterwards, the materials are slowly cooled to the room temperature, and therefore the three-dimensional product of which the shape is the same as that of the blank and the mechanical performance mainly depends on the high polymer materials is formed.

An uniform temperature type polysilicon reducing furnace comprises a bearer (1), a water jacket tube plate (10) and a furnace body (33), wherein the water jacket tube plate (10) is installed on the bearer (1); and the furnace body (33) is installed on the water jacket tube plate (10) through a flange. The uniform temperature type polysilicon reducing furnace is characterized in that the furnace body (33) is composed of a furnace cylinder inner wall (18), arc-shaped furnace outer cylinder (19) and a spherical furnace outer cylinder (20), wherein the furnace cylinder inner wall (18) facing the furnace chamber is provided with a thermoreflectance coating; Spirally arranged shoe plates (24) are installed both between the furnace cylinder inner wall (18) and the arc-shaped furnace outer cylinder (19) and between the furnace cylinder inner wall (18) and the spherical furnace outer cylinder (20). The bottom of the arc-shaped furnace outer cylinder (19) is provided with a cooling water outletand inlet (26) for cooling the furnace body (33). The cooling water between the furnace cylinder inner wall (18) and the arc-shaped furnace outer cylinder (19) and the spherical furnace outer cylinder (20) spirally rises to a steam outlet (23) arranged at the top of the furnace body and is discharged out of the furnace body (33). The joint of an electrode sleeve (12) and a water jacket tube plate(10) is provided with a silk screen or semicircular capillary cooling component (36). The furnace core space outlets of a raw material gas nozzle (32) and a tail gas outlet duct (5) are provided withporous or cancellate filter mantles (37). The furnace provided by the invention has advantages of large size, good cooling effect of the thick tube plate, uniform furnace velocity field and temperature field and remarkable energy-saving effect.

The invention discloses a dual-alloy nanocrystal rare earth permanent magnet and a preparation method therefor. The preparation method comprises the following steps of (1) preparing rapidly quenched ARE-Fe-B magnetic powder, wherein the content of ARE is greater than or equal to 12%, and ARE is selected from one or more than two kinds of mixed rare earths of La, Ce and Y; and preparing rapidly quenched PRE-Fe-B magnetic powder, wherein the content of Fe is greater than or equal to 82%, and PRE is rare earth Nd and/or Pr; and (2) performing mixing on the above-mentioned two kinds of magnetic powder, and carrying out discharge plasma sintering to obtain the isotropous nanocrystal rare earth permanent magnet. By taking the low-cost rare-earth-rich alloy and earth-earth-less iron-rich nanometer composite alloy as the raw materials of the magnetic powder, the material cost of the magnet is lowered; the sintering performance and the thermal deformation performance of the ally are improved; by virtue of the discharge plasma sintering technology, quite high fusion between the two kinds of magnetic powder with relatively high performance difference is realized, so that a magnetic hysteresis loop with single-alloy magnet characteristic is obtained; and in addition, by improving the square degree of the loop, the magnetic performance optimization is realized.

The invention relates to the field of precision measurement technology and the field of optical engineering and in particular relates to a portable combined zero setting high precision laser large working distance auto-collimation device and method. The device comprises a light source, a collimating mirror, a reflector, and a feedback imaging system. The method makes reflected light beams return to the image plane center of the feedback imaging system by adjusting the reflector and obtains the angle change of the surface of a measured object by means of an angle deflection measuring device on the reflector. The reflector is added to a conventional auto-collimation angle measuring system, so that the problem that measurement is impossible because reflected light of a measured object deviates from the measuring system is solved and the auto-collimation working range is increased on the condition of the same working distance or the working distance is increased on the condition of the same working range. Owing to the specific design of the collimating mirror, the feedback imaging system and the reflector, the device is small, portable, and high in measurement precision, can monitor the stability of measurement environments, and can perform measurement rapidly.

The invention discloses a thermo-stable oriented silicon steel making method. The method includes a scanning step. In the scanning step, an ultraviolet femtosecond laser with the wavelength of 343 nm is adopted for performing scanning on the surface of a single side of an oriented silicon steel sheet so as to carve multiple trench lines perpendicular to the rolling direction of oriented silicon steel. By means of the thermo-stable oriented silicon steel making method, iron loss can be substantially reduced.

The invention discloses a finger tip tight sealing sheet picosecond ultra-fast laser cutting quality control method. The deformation problem caused by local heat stress introduced during picosecond laser cutting can be solved. According to the method, a manner of segmented cutting is adopted, a part is divided into symmetrical areas on the macro level according to the structural characteristic tobe cut, a ring is divided into small arc segments, and an outer circle and an inner circle are cut in a staggered manner; and when each small arc segment is cut, the cutting trajectory is layered, thecutting speed at different layer numbers changes according to a certain rule, the chip breaking falling behavior of each small arc segment material is controlled, and therefore a cutting effect of stress balance in each cutting area is achieved as a whole.

The invention discloses a deslagging waste heat utilization device for a circulating fluidized bed boiler. By the adoption of the deslagging waste heat utilization device for the circulating fluidized bed boiler, the situations that heat deformation of a deslagging pipe is caused, and leakage is also caused due to the fact that an inner pipe is abraded by bottom slag are prevented. The deslagging waste heat utilization device for the circulating fluidized bed boiler comprises a deslagging hole, a deslagging connector, a collection header, a deslagging heat exchange pipe, a plurality of reinforcing ribbed plates, a distribution header, a cooling water inlet pipe, a cooling water outlet pipe, a three-dimensional expansion joint, a cooling air inlet, the deslagging pipe, a manual gate valve, an electric gate valve, an accident deslagging pipe, an underpant-shaped tee joint, an outer pipe, the inner pipe, a plurality of guide plates, pins and guide cavities. The deslagging connector is in a cone shape. The upper end opening of the deslagging connector is connected with the boiler deslagging hole, and the lower end opening of the deslagging connector is connected with the upper end of the collection header. An annular cavity is formed by the deslagging heat exchange pipe by concentrically sleeving the small-diameter inner pipe with the large-diameter outer pipe. The guide plates with the same width are welded between the wall of the inner pipe and the wall of the outer pipe, and the annular cavity is equally divided into the guide cavities not communicating with one another in the circumferential direction by the guide plates. The annular reinforcing ribbed plates which can prevent the deslagging heat exchange pipe against heating expansion and deformation are arranged on the outer wall surface of the outer pipe of the deslagging heat exchange pipe.

The invention relates to a method for measuring the thermal error of a grinding wheel spindle of a grinder. The method comprises the following specific steps: 1. arranging non-contact displacement sensors; 2. determining the position of each sensor relative to the grinding wheel spindle; 3. measuring the thermal deformation of the spindle; and 4. modifying the thermal deformation of the grinding wheel spindle and the random measurement error. By solving the problem of measuring the thermal deformation of the grinding wheel spindle of the grinder and providing the method for determining the position of the sensor relative to the grinding wheel spindle, the invention can accurately determine the thermal deformation in X and Y directions. The method is also applicable to the measurement of thermal deformation of a machining center spindle without the function of spindle location.

The invention provides a double-permanent-magnetic-tube two-end symmetric excitation cylindrical low frequency vibration calibration table with magnetic field tracking compensation, belonging to the field of vibration measurement technology. A cylindrical closed type magnetic field structure design is provided. Two cylindrical permanent magnetic tubes are symmetrically installed at two ends of an electromagnetic drive structure and face magnetic poles. Two symmetric closed magnetic circuits are formed by magnet yokes. The magnetic induction intensity distribution with high uniformity is generated in air gaps. The surfaces of the magnet yokes adjacent to the air gaps are provided with an array type micro structure in the form of deep trenches, and the eddy current loss can be effectively inhibited. A center magnet yoke is provided with a compensation coil, and a formed compensation magnetic field carries out synchronous tracking compensation on the influence of an armature reaction. The organic integration design of air lubricated guide technology is employed, and outstanding electromagnetic drive mechanical performance and high movement guide precision are obtained at the same time. According to the double-permanent-magnetic-tube two-end symmetric excitation cylindrical low frequency vibration calibration table, large stroke, high thrust, a linear electromagnetic driving force characteristic and high movement guide precision can be considered, and a high precision and large stroke high performance low frequency vibration calibration table technical scheme is provided for low-frequency/ultra-low frequency vibration calibration.

The invention provides a four-axis optical fiber laser welding device and belongs to the technical field of welding equipment. The four-axis optical fiber laser welding device comprises a machine table, a welding mechanism, a locating mechanism, a cooling mechanism, a power supply mechanism and a control mechanism. The locating mechanism comprises an X-axis device horizontally and fixedly connected with the top surface of the machine table, a Z-axis device perpendicularly connected with the top surface of the X-axis device, a Y-axis device perpendicularly connected with the side face of the Z-axis device and a C-axis rotary shaft connected with one end of the Y-axis device. The welding mechanism comprises a laser welding head arranged on the C-axis rotary shaft, a laser generator arrangedinside the machine table and a gas shielding device. A control system comprises an industrial personal computer arranged inside the machine table, a displayer, a keyboard and a mouse, wherein the displayer, the keyboard and the mouse are arranged beside the machine table and matched with the industrial personal computer for use. The four-axis optical fiber laser welding device can realize automatic welding, substantially reduces the manual workload and the requirement for the special technical skills, reduces human errors and the manpower requirement and improves the production efficiency andproduct quality.

The invention discloses a heat transfer substrate self-clamping type LED (light emitting diode) tubular lamp supported by a lamp shade, and a heat radiator of the LED tubular lamp, and belongs to the technical fields of support, suspension or connecting devices of illumination devices. The heat radiator of the LED tubular lamp comprises a heat radiating main body (1) and a heat transfer substrate mounting part (2), wherein the cross section of the heat radiating main body (1) is in a hollow semi-cylinder shape. The heat radiator is characterized in that the heat transfer substrate mounting part (2) is connected with a heat transfer bottom surface (11) and is provided with bar-shaped clamping grooves (21), and the bar-shaped clamping grooves (21) are used for mounting a heat transfer substrate (3). The heat transfer substrate self-clamping type LED tubular lamp supported by the lamp shade has the advantages that as the heat transfer substrate mounting part is provided with the bar-shaped clamping grooves, the heat transfer substrate can be clamped in the bar clamping grooves, and the heat transfer substrate is fixedly arranged on the heat radiator without screws, so the assembling efficiency is high, and the requirement of automatic and quick production is met; the heat transfer substrate is clamped in the bar-shaped clamping grooves and is in contact with multiple surfaces of the bar-shaped clamping grooves, so the heat radiating efficiency is improved, and the heat deformation of the heat transfer substrate is avoided.

The invention relates to a permanent magnet synchronous heat pipe cooling electric spindle, comprising a spindle housing, wherein a spindle is mounted in the spindle housing, the two ends of the spindle are respectively supported by a front bearing and a rear bearing, the front bearing and the rear bearing are respectively mounted on a front bearing assembly and a rear bearing assembly, and the heat generated by the front and rear bearings can be greatly transmitted; a heat pipe base is fixed in the middle of the spindle housing, a heat dissipation chamber is designed at the rear end of the spindle housing, and an inorganic heat pipe passes through the heat pipe base, with a condensation end inserted into the front bearing assembly and passing through the rear bearing assembly, and an evaporation end extending into the heat dissipation chamber to absorb the heat generated by the bearings and a motor stator to a certain extent; and at the same time, a heat sink is arranged at the evaporation end of the heat pipe. The electric spindle is improved relative to other spindle devices in internal structure, heat pipe mounting position, motor selection and cooling method; a permanent magnet synchronous motor is selected, so the rotor has low heat generation; and the overall structure is simple, the operation is stable, and the service life of the electric spindle can be prolonged.

The invention provides a rectangular open magnetic field type low-frequency vibration calibration table with double-magnetic-circuit two-end symmetric excitation, belonging to the field of vibration measurement technology. A rectangular open magnetic field type magnetic circuit structure is provided. Two permanent magnets are symmetrically installed at two ends of a center magnet yoke and face magnetic poles. Two symmetric closed magnetic circuits are formed by magnet yokes. The strong magnetic field distribution with high uniformity is generated in air gaps. After a working coil is energized, the working coil is affected by Lorentz force in a magnetic field, and precisely controllable electromagnetic drive force is generated. The surfaces of the magnet yokes adjacent to the air gaps are provided with an array type micro structure in the form of deep trenches, and the eddy current loss can be effectively inhibited. The organic integration design of air lubricated guide technology is employed, and outstanding electromagnetic drive mechanical performance and high movement guide precision are obtained at the same time. According to the rectangular open magnetic field type low-frequency vibration calibration table, large stroke, high thrust, a linear electromagnetic driving force characteristic and high movement guide precision can be considered, and the high performance low frequency vibration calibration table is provided for low-frequency/ultra-low frequency vibration calibration.

The invention discloses a shield sealing contact surface restoring method, which comprises a fusion welding filling step, wherein the fusion welding filling step comprises at least two circulations, in each circulation, grooves formed in the sealing contact surface are subjected to the fusion welding filling, and the stress caused by the fusion welding is relieved; and bead welds formed by the fusion welding filling are ground to the original plane height. The shield sealing contact surface restoring method avoids the thermal deformation problem of the original process in the fusion welding filling process, so operators can also control the fusion welding filling in the process, and the planeness of the final control is realized. The shield sealing contact surface restoring method has the advantages that the cost is lower, the restoring work period is short, the effect is good, and the sealing performance is good.

The invention belongs to the technical field of precision measurement and the field of optical engineering and particularly relates to a portable high-dynamic-precision large-working-distance auto-collimation device and method. The device is composed of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system. The method includes the steps that the reflecting mirror is adjusted, reflected light beams return to the center of the image surface of the feedback imaging system, and the angle change of the surface of a measured object is acquired through an angle deflection measuring device on the reflecting mirror. Due to the fact that the reflecting mirror is additionally arranged on a traditional auto-collimation angle measuring system, the problem that due to the fact that reflected light of the measured object deviates from the measuring system, measurement cannot be carried out can be avoided, and then the advantage that the auto-collimation working range is increased at the same working distance or the working distance is increased within the same working range is achieved; in addition, through the specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the device and method further have the technical advantages that the device is small, portable and high in measuring precision; the assembly process of the measured object can be monitored in the whole course; measurement is rapid.

A double-magnetic-circuit symmetrically-excited cylindrical enclosed magnetic-field-type electromagnetic shake table magnetic circuit structure capable of realizing magnetic field tracking compensation belongs to the technical field of vibration measurement. A cylindrical enclosed magnetic field structure is provided, two cylindrical permanent magnets are symmetrically installed on two ends of a central magnet yoke, and same magnetic poles are arranged in an opposite manner; two symmetrical enclosed magnetic circuits are formed through magnet yokes, the magnetic induction intensity high in uniformity is generated in an air gap; the surface, adjacent to the air gap, of the magnet yoke is provided with an array-type microstructure arranged in a deep channel mode, and the eddy current loss can be effectively inhibited; and a central magnet yoke is provided with a compensation coil, a provided current is opposite to the current in a working coil in direction and is proportional to the current in the working coil in phase synchronous tracking and amplitude, and a formed compensation magnetic field is capable of carrying out synchronous tracking compensation on the influences of an armature reaction. According to the invention, a large stroke, high magnetic field uniformity, a large thrust and linear electromagnetic driving force characteristics can be considered at the same time, and a high-precision and large-stoke electromagnetic shake table magnetic circuit structure technical scheme is provided for low-frequency/ultralow-frequency vibration calibration.

The invention provides a rectangular open magnetic field type electromagnetic vibration table magnetic circuit structure with double-magnetic-circuit two-end symmetric excitation, belonging to the field of vibration measurement technology. A rectangular open type magnetic field structure design is provided. Two permanent magnets are symmetrically installed at two ends of a center magnet yoke and face magnetic poles. Two symmetric closed magnetic circuits are formed by magnet yokes. The magnetic induction intensity distribution with high uniformity is generated in air gaps. After a working coil is energized, the working coil is affected by Lorentz force in a magnetic field, and precisely controllable electromagnetic drive force is generated. The surfaces of the magnet yokes adjacent to the air gaps are provided with an array type micro structure in the form of deep trenches, and the eddy current loss can be effectively inhibited. According to the rectangular open magnetic field type electromagnetic vibration table magnetic circuit structure, large stroke, high magnetic field uniformity, high thrust and a linear electromagnetic driving force characteristic can be considered, the disadvantages in the existing technical scheme can be effectively solved, and a high precision and large stroke electromagnetic vibration table magnetic circuit structure technical scheme is provided for low-frequency/ultra-low frequency vibration calibration.