36results about How to "Eliminate thermal deformation" patented technology

A combustion type power tool capable of avoiding damage to seal members and a housing to prolong a service life, and capable of enhancing operability and workability. Temperature elevation of a combustion chamber frame due to combustion of a mixture of combustible gas and air is detected by a temperature sensor disposed in a housing. If the detected temperature exceeds a preset temperature, ignition of an ignition plug is prohibited by a prohibiting unit in spite of ON operation of a trigger switch. In this state, alarming is performed by a display to notify the user of the inoperable state of the tool. Similar control can be made when the temperature sensor is disposed at a cylinder, an exhaust cover and the housing.

The invention discloses an isolation type non-woven fabric textile winding machine which belongs to the technical field of textile winding. A cooling fan is arranged at the top of a fixed bracket; anupper flattening roller and a lower flattening roller are arranged at the top of a first bracket in sequence from top to bottom; a tensioning roller is arranged at the top of a third bracket; the tensioning roller is connected onto the third bracket through a second connecting shaft; a second through hole is formed in the top of a side wall of a second bracket; a second fixed block is arranged atthe top of the second through hole; a second rigid spring is arranged at the bottom of the second fixed block; a third connecting shaft is provided with a tracking roller; six groups of winding rollers with the same structure are arranged below the tracking roller; the winding rollers are connected with a connecting frame through a fourth connecting shaft; a ratchet wheel mechanism which is matched with a mounting groove is arranged at the left end of a fifth connecting shaft. The winding machine disclosed by the invention is reasonable in structural design and high in automation degree; simple and convenient textile winding work can be ensured and the winding effect of the fabric is remarkable.

The invention provides a magnetic suspension feeding platform of a liner synchronous motor of a digital control machine tool, comprising a feeding platform and a long stator linear synchronous motor, wherein the long stator linear synchronous motor mainly comprises a stator iron core and a rotor iron core capable of making motion relative to the stator iron core. The invention is characterized in that the feeding platform is installed on the rotor iron core; an excitation winding is arranged in the rotor iron core, and a thrust winding is arranged in the stator iron core; the feeding platform is provided with an eddy current sensor; the stator iron core is provided with a long grating sensor; the excitation winding and the eddy current sensor are connected to a magnetic suspension control system; and thrust winding and the long grating sensor are connected to a feeding control system. The invention adopts the normal magnetic tensile force of the electro-magnetic liner synchronous motor to suspend the feeding platform in order to eliminate friction, thereby having significant meaning for further improving the processing accuracy of the feeding platform of the digital control machine tool.

The invention relates to a device and method for testing resolution of a reflector. The tested reflector is placed in a high-and-low-temperature box, and is heated or cooled to a target temperature, parallel light which is transmitted by a collimator penetrates through a light window of the high-and-low-temperature box, the measured reflector and an optical window and enters a front mirror, the front mirror is used for observing a resolution ratio target plate image of the collimator, and the resolution ratio of the reflector is measured at different temperatures. In addition, a surface of the optical window is positioned in the high-and-low-temperature box while another surface of the optical window is positioned out of the high-and-low-temperature box, when the high-and-low-temperature box works at different temperatures, the temperatures of the inner surface and the outer surface of the optical window are not consistent, parameter thermal deformation can be caused, measurement precision can be affected, and even the high-and-low-temperature box cannot be used completely. In order to guarantee measurement precision, heating films are plated on the inner surface and the outer surface of the optical window, the temperatures of the two surfaces of the optical window are consistent, and the thermal deformation is eliminated.

The invention discloses a reverse welding technology for preventing the deformation of a resistance welding workpiece, which comprises the following steps: first, a workpiece platform (3) is mounted under the workpiece; then plank stuff (4 and 5) is arranged on the plane of the platform (3); after a welding pin (6) is mounted and positioned, an upper electrode (1) is pressed first to press the plank stuff (4 and 5) on the workpiece platform; then a lower electrode (2) rises to support the workpiece tightly; the electrodes (1 and 2) discharge electricity to perform welding; during the discharge of electricity, the welding pin (6) in the formed return circuit serves as both a workpiece and an electrode; during welding, the wind direction of axial blowers arranged in advance on the upper and the lower surfaces of the plank stuff (4 and 5) is aimed at the welding position and the direction of the welded plank stuff; the wind, which is mainly aimed at the welding position, is blown constantly to perform wind cooling to the welding point. The reserve welding technology for preventing the deformation of the resistance welding workpiece is mainly used for solving the problem of the deformation of workpieces with relatively large areas when resistance welding is used, thus eradicating the thermal deformation and the mechanical deformation of the workpieces, ensuring the planeness of the workpieces and improving product quality.

The invention provides a large-sized static mixer. The large-sized static mixer comprises a pipeline and a mixing unit arranged in the pipeline, wherein openings are formed in two ends of the pipeline; the mixing unit comprises a first blade, a second blade, a third blade and a fourth blade which are of a circular arc sheet shape; the first blade and the second blade are arranged in an opposite crossing manner, the axis of the crossing point is level, the first blade forms a downward deflection angle around the axis of the crossing point, and the second blade forms an upward deflection angle around the axis of the crossing point; the third blade and the fourth blade are arranged in an opposite crossing manner, the axis of the crossing point is vertical, the third blade forms a right deflection angle around the axis of the crossing point, and the fourth blade forms a left deflection angle around the axis of the crossing point; the rear end of the first blade is connected with the plate surface of the third blade, the rear end of the second blade is connected with the plate surface of the fourth blade, the front end of the third blade is connected with the plate surface of the second blade, and the front end of the fourth blade is connected with the plate surface of the first blade. By virtue of a special blade combination manner, the integral structural strength of the mixer is enhanced, and by virtue of a reasonable integral structure, the mixer has excellent mixing efficiency.

The invention provides a magnetic levitation motion stage provided with controllable excitation linear synchronous motors and used for a vertical machining center. The magnetic levitation motion stage is characterized in that the magnetic levitation motion stage comprises a motion stage, a base, the controllable excitation linear synchronous motors, a levitation control system and a motion control system. The magnetic levitation motion stage has the advantages and effects that the electromagnetic thrust force is changed by adjusting the current of armature windings; the magnetic levitation forces are the unilateral magnetic pull generated between excitation magnetic poles on stators and rotor iron cores of the linear synchronous motors and are adjusted by adjusting the exciting current; the motion stage depends on the magnetic levitation forces generated by the two motors to operate and has the capacity of direct automatic levitation.

The invention discloses a crankshaft and main shaft neck grinding method. The method comprises the following steps: (A) firstly, a tip hole is grinded; (B) a main shaft of a machine tool is flexibly connected with a crankshaft through a universal coupling; and the other end of the crankshaft butts against the tip of a tail frame of the machine tool; (C) a middle main shaft neck is used as a reference support position; and after adjustment, the tail frame is loosened; (D) the middle main shaft neck is roughly grinded by using a grinding wheel, so that a grinding quantity of 0.1-0.12 mm is formed between the size of the middle main shaft neck in the reference support position and the middle main shaft neck of a finished crankshaft; (E) the step (D) is repeated; multiple times of fine grinding are repeated; and the middle main shaft neck is grinded to the size of the middle main shaft neck of the finished crankshaft; and (F) main shaft necks in two bearing positions are grinded to reach the size of the main shaft neck in the bearing position of the finished crankshaft to finish the operation; and when the main shaft necks in the two bearing positions are grinded, a bracket is used onthe middle main shaft neck. Compared with the prior art, the method can solve the problem of weak fine grinding of traditional crankshaft and main shaft neck coaxiality.

The invention discloses a tube bundle type cooler soot deposit cleaning device which comprises a cooler machine body, wherein a plurality of rows of cooling tubes are arranged in the cooler machine body; a jetting tube is fixed above a space between the two rows of cooling tubes; each jetting tube is provided with a nozzle which is corresponding to the position of the tube mouth on the top of the corresponding cooling tube one by one; and one end of the jetting tube extends out of the cooler machine body and is communicated with an air supply system. The tube bundle type cooler soot deposit cleaning device has the advantages of simple structure, small energy consumption and low cost, is convenient to install and use and is convenient to operate and maintain, and instant expansion generated when air is compressed is used for impacting the soot deposit, raise the dust and take away the dust so as to prevent generation of scales.

The invention discloses a vacuum plug for LNG liquefied natural gas bottle, relates to the technical field of liquefied natural gas equipment, and comprises a C-shaped sealing ring, a first O-shaped sealing ring and several second O-shaped sealing rings; the plug seat is hollow Cylindrical structure, the inside is divided into a first opening chamber, a connecting chamber and a second opening chamber from inside to outside, and the diameters of the first opening chamber and the second opening chamber are larger than the diameter of the connecting chamber; the plug The body is a cylindrical structure, and the diameter of the plug body is adapted to the diameter of the second opening chamber; a first annular groove and several second annular grooves are opened on the plug body; a column is also arranged inside the plug body Plug body, the diameter of the plunger body matches the diameter of the connecting chamber; a third annular groove is opened on the plunger body; the C-shaped sealing ring is clamped in the third annular groove; the first O-shaped sealing ring It is clamped in the first annular groove; each second O-ring is clamped in a corresponding second annular groove.

The present invention provides a method for manufacturing a liquid crystal display device and a liquid crystal display device. The method includes (1) preparing a TFT substrate and a CF substrate; (2) applying sealant resin to the TFT substrate or CF substrate to form an enclosing resin frame body that forms an entry opening on the CF substrate or the TFT substrate; (3) applying sealant resin to the entry opening of the enclosing resin frame body to form a closing section; (4) filling liquid crystal inside the enclosing resin frame body; (5) bonding the TFT substrate and the CF substrate together; and (6) subjecting the bonded TFT substrate and the CF substrate to curing at high temperature in order to cure the enclosing resin frame body.

The invention provides an engine cylinder body casting sand core applied to the field of automobile engine manufacturing auxiliary equipment, and further relates to a method for casting a cylinder body through the casting sand core. Mounting holes of a rubber bar (5) are formed in an air inlet side water channel machining component (2) and an exhaust side water channel machining component (3) of a cylinder body water jacket sand core (1) of the engine cylinder body casting sand core. One end of the rubber bar (5) is mounted on the air inlet side water channel machining component (2), and the other end of the rubber bar (5) is mounted on the exhaust side water channel machining component (3). According to the engine cylinder body casting sand core and the method for casting the cylinder body through the casting sand core, a channel for enabling an air inlet side water channel to communicate with an exhaust side water channel can be machined conveniently and reliably, cooling water between the air inlet side water channel and the exhaust side water channel of an engine freely flows, the temperature difference between an air inlet side water jacket and an exhaust side water jacket is reduced, the overall performance of the engine is improved, and the emission of the engine is reduced.

The invention relates to spin riveting equipment suitable for an automobile temperature regulator. A spin riveting jig is jointly driven by a first driving unit and a second driving unit, and a downward pressing unit is driven by a third driving unit. When a support for inserting the automobile temperature regulator is inserted in place in an inserting positioning table of the spin riveting jig, avalve, a push rod, a temperature sensor and a spring of the automobile temperature regulator are arranged in the support, the downward pressing unit tightly presses the support under the action of the third driving unit, a left arranged limiting unit and a right arranged limiting unit act so as to tightly press the support of the automobile temperature regulator into the inserting positioning table, the downward pressing unit moves upwards under the action of the third driving unit so as to be separated from the support by a preset distance, after a valve seat of the automobile temperature regulator is aligned relative to the support, a left arranged material pressing unit and a right arranged material pressing unit act to press down and pre-tighten the valve seat so as to enable the valve seat to cling to the support, and a spin riveting head acts to finish spin riveting combination of the support and the valve seat.