31results about How to "Assembly accuracy is easy to guarantee" patented technology

The invention provides a special-shaped-surface modular grinder tailstock center sleeve support structure comprising a triangular center sleeve, a special-shaped surface shell, an adjusting press plate, a pressure spring, a spring pretightening nut, a guide sleeve, an adjusting screw, a rotating hand wheel, a clamping adjusting gear and the like. The tailstock center sleeve of a grinder is mounted in a special-shaped surface support. The invention further provides a corresponding method. By using the special-shaped surface support for replacing a traditional cylindrical support structure, the special-shaped-surface modular grinder tailstock center sleeve support structure has the advantages of high radial stiffness of the center sleeve, suitability for large-sized heavy-load mechanisms, proneness to guaranteeing assembly accuracy, easiness in adjustment after wear of the support and the like.

The invention relates to automobile dead axle train hydrodynamic drive transmission. It is formed by hydrodynamic torque converter and transmission. The former includes dynamic force coupling, locking clutch, runner, impeller, oil pump, idler pulley seat, and input shaft. The latter includes driving shaft, each driving gear, output shaft, gear shift sleeve, and reverse shaft and gear. It has the advantages reasonable structure and convenient installation.

The invention discloses an image-detection-based assembling method capable of guaranteeing instrument assembly assembling precision. The assembling method is used for assembling instrument assembliesby using an instrument assembly assembling precision control device on the basis of image detection. The assembling method the comprises the following steps that step A, a lower jig is clamped to an assembling table for positioning and fixing; step B, the instrument assemblies are clamped to a levelness detection CCD assembly for assembly surface levelness detection and calibration as well as temporary storage; step C, an assembling assembly sucks the instrument assemblies to a position above the assembling table, a concentricity detection CCD assembly is used for performing concentricity detection and calibration of the instrument assemblies before assembling and during the lowering process, and then glue dispensing is carried out in sequence; step D, an upper jig and the lower jig are buckled and combined, and then the concentricity detection CCD assembly is used for performing assembling concentricity re-inspection of the instrument assemblies. The assembling method has the beneficial effects that the assembling precision is higher, the assembling precision is easy to guarantee, the relative positions of the instrument assemblies can be adjusted in real time, the assembling costis low, the assembling efficiency is high, the automation degree is high, and the assembling time is short.

The invention provides a method and device for determining a welding posture of a pipeline assembly and an upper computer, and relates to the technical field of pipeline assembling. The method for determining the welding posture of the pipeline assembly comprises the following steps that the spatial position posture of each part in the pipeline assembly in the pipeline assembly is acquired, wherein the parts comprise guide pipes, two-way connecting parts and / or three-way connecting parts; the information of the pipe feeding amount, the rotation angle and the bending angle are acquired when theguide pipes are bent; the scribing positions of the head ends and / or the tail ends of the guide pipes are determined according to the information of the pipe feeding amount, the rotation angle and the bending angle during bending and the spatial position posture of each part; and according to the scribing positions, the welding posture of the pipeline assembly is determined. According to the scheme of the method and device for determining the welding posture of the pipeline assembly and the upper computer, the step of building a combined clamp in the welding process of a complex pipeline assembly is omitted, the manual operation amount is reduced, and the welding efficiency of the complex pipeline assembly is improved.

The invention belongs to the field of steel structure construction, and particularly relates to an offset lifting slip device and method. A lifting supporting frame is arranged on a structure main body steel column; an assembled jig frame is erected on a floor, and main body roof trusses are assembled into an overall structure; the overall roof trusses are lifted to be arranged below a load-bearing track beam; hydraulic jacking and pushing driving equipment is connected with a lifting load-bearing beam through a pin shaft, the hydraulic jacking and pushing driving equipment is started, and thelifting load-bearing beam is jacked and pushed to slip to a calculated elevation on the load-bearing track beam; and four jacks are used on the structure main body steel column for jacking lower chords of the roof trusses, a lifter equipment device is shut down, all the jacks unload the main body roof trusses in place in synchronous and in-step modes, and the main body roof trusses and the structure main body steel column are fixedly connected, so that construction is completed. According to the offset lifting slip device and method, working at heights is reduced, safety is improved, the efficiency is high, and the cost of measures is saved.

The invention relates to a double-nut ball screw pair pre-tightening force adjusting and measuring device and a linear feeding system. The double-nut ball screw pair pre-tightening force adjusting and measuring device comprises a main screw nut, a nut sleeve, a locking nut, a pre-tightening nut, a thrust bearing, a front disc spring fixing plate, a first disc spring, a second disc spring, a rear disc spring fixing plate, an annular pressure sensor, a sensor fixing plate, an auxiliary screw nut, an auxiliary nut connecting plate and a worktable connecting plate; one end of the nut sleeve is in fastened connection with the main screw nut; the locking nut and the pre-tightening nut are connected to the nut sleeve by threads; the thrust bearing clings to the pre-tightening nut; the front disc spring fixing plate clings to the thrust bearing; the excircle side of the first disc spring clings to the front disc spring fixing plate; the inner hole of the second disc spring clings to the inner hole of the first disc spring; the rear disc spring fixing plate clings to the excircle side of the second disc spring; and the annular pressure sensor clings to the rear disc spring fixing plate, the sensor fixing plate clings to the annular pressure sensor, and the other side of the sensor fixing plate is in fastened connection with the auxiliary screw nut.

The invention discloses an engine bearing bush mounting and dismounting tooling, belonging to the field of engine assembly. The engine bearing bush mounting and dismounting tooling comprises a tooling body, two ends of which are respectively a dismounting end and an mounting end, and the mounting end includes guides in a direction away from the dismounting end in turn. The journal and the bearing bush are matched with the journal, and the diameter of the guide journal is larger than that of the bearing bush and the journal. On the thrust surface of the bearing bush, the guide ring can be hooped on the outer circumference of the two half-tiles, which can provide radial limit to the bearing bush during the installation process to prevent radial deformation or radial displacement of the two half-tiles, and the guide ring can During the press-fitting process, it moves axially along the guide journal to play an axial limit on the installation of the bearing bush and determine the pressing amount of the bearing bush into the bearing seat. The engine bearing bush installation and disassembly tooling structure is simple, the manufacturing cost is low, and the assembly accuracy is easy to ensure.

A four-roller and six-roller combined temper mill comprises rail chairs, cross beams, operating side machine frames, a first six roller system, a tension measuring roller and a second four roller system. The two rail chairs are fixed on a foundation of a plant. The operating side machine frames and transmission side machine frames are fixed and supported on the rail chairs, are integral steel casting parts with double windows and are connected integrally in a combined mode through four cross beams. The first six roller system and the second four roller system are respectively installed into corresponding machine frame windows, the tension measuring roller is arranged between the first six roller system and the second four roller system, is supported on a machine frame and is used for measuring rolling tension, and strip steel passes through the first six roller system, the tension measuring roller and the second four roller system to achieve secondary cold rolling and smooth temper rolling. The four-roller and six-roller combined temper mill has the remarkable advantages of being compact in structure, short in strip steel penetration time and high in unit efficiency and yield, easily ensuring overall assembly precision and the like.

The invention relates to a fast connecting device used for offline loading test of an automotive transmission. The fast connecting device comprises a coupling flange, a flange cover and a pin shaft extending out of the end surface of the coupling flange; a spring B is propped against the part between the pin shaft and the flange cover; a spring A is propped against the part between the flange cover and a loading transmission shaft; buffer butting between a differential mechanism connecting shaft and the loading transmission shaft is realized through the spring A and the spring B, so that the impact caused by fast butting of a hydraulic oil cylinder can be completely overcome, and adaptability to high-speed transmission can be realized; the differential mechanism connecting shaft serves as a plug for oil plugging in a differential mechanism; the differential mechanism is not needed to be provided with another plug. The fast connecting device provided by the invention is used for limiting the loading transmission shaft and the pin shaft through a central step hole and a plurality of peripheral step holes, compact in structure, reasonable in design and easier in ensuring assembly precision, has lightweight advantages, can also prevent the transmission and other related parts from impact damage while the efficiency of a whole assembly line is improved by 70 percent and can be widely applied to the fields of automobiles, new energy electric vehicles and other gear drives.