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

The invention discloses a diamond grinding wheel sensing brazing device and a brazing method. The brazing device comprises a sensing power source and a sensing coil which is electrically connected with the sensing power source. The brazing device further comprises a grinding turning wheel which fixes a diamond grinding wheel base body, the sensing coil is arranged on the outer periphery of the diamond grinding wheel base body and distributed in point shape, and a gas protective cover is arranged outside the sensing coil. The gas protective cover is connected with an inert gas source. The diamond grinding wheel sensing brazing solves the problems that brazing technology in an existing vacuum furnace is long in brazing period, thermal deformation of the grinding wheel base body is large and the like. A heating area is concentrated on the surface layer of the grinding wheel base body, so that the diamond grinding wheel sensing brazing device can effectively eliminate thermal deformation of the grinding wheel base body, and is beneficial to being applied to high-efficiency precise grinding machining of a single-layer brazing diamond grinding wheel. Secondly, temperature of the surface of the base body can quickly rise to brazing temperature. Finally, manufacturing period of a diamond grinding wheel is shortened greatly, and brazing efficiency is improved.

The invention provides a paper sheet thickness detection device which can be disposed on an automatic note processing device and accurately detect altered notes bound with tapes. The paper sheet thickness detection device comprises a housing supporting detection rollers and reference rollers in a rotary manner, and a plurality of displacement detection sensors disposed on the upper surface, which is opposite to the detection rollers, of the housing and used for detecting displacements of the detection rollers. The paper sheet thickness detection device is used for detecting the thicknesses of paper sheets conveyed through contact parts between the reference rollers and the detection rollers. Inner rings of ball bearings are fixed to the both ends of a rotating shaft of the reference rollers and a rotating shaft of the detection rollers; outer rings of the ball bearings fixed to the ends of one of the rotating shafts of the reference rollers and the detection rollers are fixed to installation holes of the housing; and the outer rings of the ball bearings installed on the ends of the other rotating shaft of the reference rollers and the detections rollers are inserted in the installation holes of the housing.

A controllable excitation linear synchronous motor magnetic levitation motion platform for a vertical machining center, characterized in that: the magnetic levitation motion platform includes a motion platform, a base, a controllable excitation linear synchronous motor, a suspension control system and a motion control system; Adjust the current of the armature winding to change the electromagnetic thrust; the magnetic levitation force is the unilateral magnetic pull generated between the excitation pole on the stator and the mover core of the linear synchronous motor. The magnetic levitation force is adjusted by adjusting the excitation current. The motion platform relies on two The magnetic levitation force generated by the motor itself operates, and has the ability of direct automatic levitation.

The invention relates to an ultrathin shaft part finish turning clamp which comprises a mandrel. A first flange is fixedly connected with one end of the mandrel, and the other end of the mandrel is in threaded fit with a second flange. Each of the first flange and the second flange comprises three steps of circular truncated cones. A center hole is formed in the end surface of each first step of circular truncated cone. A rubber ring sleeves the circumferential excircle of each second step of circular truncated cone. More than three threaded holes are uniformly formed in the end surface of each second step of circular truncated cone. The external diameter of the circumferential excircle of each third step of circular truncated cone is 1-2 mm smaller than the internal diameter of an ultrathin shaft part. A press plate sleeves each second step of circular truncated cone. Center holes of the press plates sleeve the first steps of circular truncated cones. More than three through holes are uniformly formed in the side wall of each press plate. Bolts pass through the through holes and then are matched with the threaded holes in the end surfaces of the second steps of circular truncated cones so as to enable the outer edges of the side walls of the press plates to be propped against the outer sides of the rubber rings. An oil circuit used for communicating the inner end of the first flange with a nozzle arranged on the circumferential excircle of the first step of circular truncated cone is arranged on the first flange. A shift rod is arranged on the first step of circular truncated cone of the second flange. Compared with the prior art, the ultrathin shaft part finish turning clamp has the advantages that the rigidity of the ultrathin shaft part is enhanced, and the thermal deformation is eliminated.

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 discloses an assembled high-protection photovoltaic combiner box, which includes a box body, a mounting plate and a door panel. The box body is a rectangular frame structure with openings on both sides. The mounting plate and door panels are respectively installed on both sides of the box body, and sealing corner pads are also included. , rear gussets and front gussets, the four corners of the box are respectively provided with sealing corner pads, and the rear gussets and front gussets are installed in the sealing corner pads; the invention also discloses an assembled high-protection photovoltaic combiner box The installation method; this product adopts the special design and manufacturing process of integrated box body and internal sealing, which completely solves the impact of the harsh external environment on the internal components, and the protection level is as high as IP65; all the parts that make up the box body adopt standard modularization , without any welding, completely reduce the impact of thermal stress caused by welding on its shell, improve efficiency, save energy and reduce consumption.

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 relates to a welding and positioning device for a flywheel assembly in the technical field of motorcar part manufacture, comprising air cylinder connecting pieces, a limit piece, a clamp base, an inner gripping sleeve, an outer gripping sleeve and a positioning ring, wherein the inner gripping sleeve and the outer gripping sleeve are respectively arranged on the upper brim of the positioning ring, the limit piece is sheathed on the inner brim of the clamp base, and a plurality of the air cylinder connecting pieces respectively run through the outer gripping sleeve, the positioning ring and the clamp base in order; and the upper and the lower ends of the air cylinder connecting pieces are respectively fixedly connected with the limit piece and a welding air cylinder, and the outer brim of the inner gripping sleeve is matched with the inner brim of the outer gripping sleeve. Aiming at solving the disadvantages of the prior art, the device changes the mode of clamping positioning to greatly eliminate the thermal distortion of a gear ring and effectively reduce the outside diameter jumpiness height and the end face jumpiness height of the flywheel assembly which needs tobe welded, thus compared with the prior art, the welding efficiency is increased by 11 percent.

The invention provides a large-scale static mixer, which includes a pipeline and a mixing unit placed in the pipeline, and the two ends of the pipeline are open; the mixing unit includes four first to fourth blades in the shape of circular arcs ; The first blade and the second blade are relatively intersected, the axis of the intersection point is horizontal, the first blade is angled downward around the axis of the intersection point, and the second blade is angled upward around the axis of the intersection point; the third blade and the fourth blade are opposite Cross setting, the axis of the intersection point is vertical, the third blade is angled to the right around the axis of the intersection point, and the fourth blade is angled to the left around the axis of the intersection point; the rear end of the first blade is connected to the board surface of the third blade, The rear end of the second blade is connected to the board surface of the fourth blade, the front end of the third blade is connected to the board surface of the second blade, and the front end of the fourth blade is connected to the board surface of the first blade. The invention increases the overall structural strength of the mixer with a special combination of blades, and the reasonable overall structure makes it have excellent mixing efficiency.