37results about How to "Correct and accurate" patented technology

A method for machining the rectangular spline shaft by centering small diameter includes such steps as machining the width of spline to predefined size, the standard arc slot of spline tooth, and big diameter, heat treating, fixing the spline shaft onto grinding machine, centering the abrasive disc with spline tooth slot, and reciprocating grinding.

This invention relates to a laser level with an angle conversion unit, which can correct any angles accurately or draw any angle lines freely. It includes a back rule, a pin shaft, a first connector, a positioning unit, a second connector and a front rule characterizing in connecting the two connectors by the shaft, the first connector is fixed on the back rule, the second is fixed on the front rule, the back rule has an universal bubble, the front rule has a light splitting unit of laser points, laser level lines, laser cross lines and vertical lines.

An apparatus is described for assembling a shelving unit consisting of a frame and a plurality of detachable shelves supported by the frame. The apparatus comprises a supply section for supplying a shelf, a testing section for inspecting the supplied shelf, a positioning section for gripping an approved shelf and subsequently mounting the shelf in the frame, and a control unit for controlling the apparatus. It is used in particular for carts for the transport of plants.

An apparatus for analysing securities data comprises a holdings module configured to determine, from the securities data, a value of a current holding in a security. The apparatus also comprises a disclosure determination module configured to determine, from a comparison of the value of a current holding with a rule stored in a database of disclosure rules, if the current holding is to be disclosed.

The invention discloses a simple automatic rotary welding platform, relates to a welding fixture for gas shielded welding, and belongs to the technical field of welder fixtures. The simple automatic rotary welding platform comprises a rotary clamping platform, a support box, a driving motor and a regulating device, the gears between a middle shaft and an output shaft are engaged to decelerate so that the rotary clamping platform is driven to rotate, current is transformed in the regulating device and outputted to the driving motor when the speed is changed, the driving motor is controlled to change the speed, the current is transmitted to the rotary clamping platform by deceleration, and rotation at different rotary speeds is finished. The simple automatic rotary welding platform can serve as a welding fixture, circular (arc) welding beads for gas shielded welding are accurately aligned in real time through speed-changing rotation of welding workpieces, so that the welding beads in welding operation is uniform, welding angles in welding operation are consistent, welding efficiency and welding quality are improved, and the simple automatic rotary welding platform is simple in structure, endurable and convenient to operate.

The invention discloses an alignment instrument for eccentricity alignment of a lathe four-jaw chuck and an alignment method. The alignment instrument comprises a pressing rod, an alignment groove is formed at the front end of the pressing rod, an arc-shaped part is arranged at the corner of the alignment groove, the circle center of the arc-shaped part coincides with the right-angle corner point of the inner wall face of the alignment groove, and a conical insertion groove is formed in the circle center of the arc-shaped part; and an inserting hole is formed at the position, close to the front end, of the pressing rod, a radial spherical plain bearing is arranged in the inserting hole, and a correcting rod is inserted into an inner ring of the radial spherical plain bearing. The alignment instrument is simple in structure and convenient to use, the clamping precision of a workpiece can be improved, the center of an eccentric part can be conveniently adjusted, the alignment method is easy to operate, and alignment can be rapidly and accurately carried out.

An alignment apparatus of a disc-shaped forging circle center comprises calipers, a drop hammer, a suspension wire and an adjusting pulling ring. Tail ends of two caliper arms of the calipers are mutually and movably riveted and lengths of the two caliper arms of the calipers are the same. A movable riveting position of the calipers is provided with a suspension wire hole. The suspension wire hole passes through the movable riveting position of the calipers so that the suspension wire passes through the suspension wire hole and then a suspension position of the suspension wire is restrained at the movable riveting position of the calipers. One end of the suspension wire is fixedly connected to the drop hammer and the other end of the suspension wire is winded and connected to the adjusting pulling ring so that a height of the drop hammer is adjusted through pulling through the adjusting pulling ring. In the invention, a geometric property that a middle line of a bottom edge of an isosceles triangle formed by the calipers and a height on the bottom edge are superposed is used so that the apparatus with the simple structure is provided so as to accurately align the disc-shaped forging circle center.

The invention relates to the technical field of mechanical machining, in particular to an alignment tool capable of achieving cylindrical grinding on a long-axis-type part and a using method of the alignment tool. The alignment tool is installed at the outer side of one side of the installation end of the long-axis-type part and is close to one end of a grinding machine head, and comprises a sleeve and a snap ring which are integrally connected, wherein the inner diameter of the snap ring is equal to the outer diameter of the installation end of the long-axis-type part. A replaceable centre stand can be inserted in the sleeve, and a conical groove of the replaceable centre stand is matched with a centre. Four through holes with inner threads are uniformly and symmetrically formed in the snap ring, and can be in thread fit with jacking screws to squeeze the installation end of the long-axis-type part tightly. The alignment tool is utilized, and the cross alignment method of utilizing four symmetric points for clamping the part by 90 degrees is adopted. The alignment operation is precise and convenient.

The invention discloses an engine cylinder oblique-hole processing clamp. The engine cylinder oblique-hole processing clamp is characterized in that a clamp plate is arranged in an inclined manner, wherein the left side surface of the clamp plate is parallel to a YZ plane of a machine tool coordinate system, and the rear side surface of the clamp plate is parallel to an XZ plane of the machine tool coordinate system; a first vertical supporting block and a second vertical supporting block are connected below the clamp plate; the top surface of the first vertical supporting block and the top surface of the second vertical supporting block are circular-arc surfaces; the bottom surface of the first vertical supporting block and the bottom surface of the second vertical supporting block are on the same plane which is parallel to the X axis and the Y axis; spacing between the first vertical supporting block and the second vertical supporting block is regulated through a transverse regulating rod; the first vertical supporting block and the second vertical supporting block are arranged on a first transverse supporting block and a second transverse supporting block; the top surface of the first transverse supporting block and the top surface of the second transverse supporting block are circular-arc surfaces, and the bottom surface of the first transverse supporting block and the bottom surface of the second transverse supporting block are on the same horizontal plane; and spacing between the first transverse supporting block and the second transverse supporting block is regulated through a vertical regulating rod. The invention also discloses an aligning method for the engine cylinder oblique-hole processing clamp.

The invention relates to a PC beam support machining clamping device and a clamping method. The PC beam bearing machining clamping device includes a worktable and a middle mechanism arranged on the workable, a hydraulic oil cylinder, a connecting rod mechanism and a fine tuning mechanism; the middle mechanism is symmetrically installed on the middle portion of the left side and the middle portionof the right side of the upper end of the worktable and is connected with the PC beam support placed on the worktable; the hydraulic oil cylinder is connected with the external hydraulic system. The hydraulic oil cylinder comprises a longitudinal hydraulic oil cylinder symmetrically arranged on the front and back sides of the worktable and a transverse hydraulic oil cylinder mounted on the top surface of the worktable. The connecting rod mechanism is symmetrically installed on the front and back top surface of the worktable, one end of the connecting rod mechanism is connected withthe piston rod of the longitudinal hydraulic oil cylinder, and the other end of the connecting rod mechanism connects with the PC beam support placed on the worktable, and the fine tuning mechanism is installed at the front side of the upper surface of the worktable and connected with the PC beam support placed on the worktable. The PC beam bearing machining clamping device and the clamping method have simpleand reasonable structure design, convenient installation and high efficiency, and can improve the processing precision and production efficiency of the PC beam support.

A position correction device belongs to the technical field of logistics, is used for solving the problem that reference correction of a piece to be transferred cannot be completed at a time in the logistics process, and comprises a base part and a correction part, the correction part is arranged on the base part, the base part is used for leveling a reference, and the correction part is used for bearing a workpiece to be transferred, so that the to-be-transferred workpiece is enabled to be in a leveling state; and the base part is a flat plate with a counter bore in the middle, a through hole is formed in the middle of the correction part, and the correction part is connected to the counter bore of the base part through the through hole. The correction part is arranged, so that the to-be-transferred workpiece can be accurately aligned, the device for transferring the to-be-transferred workpiece can obtain a clamping point, and the workpiece can be accurately grabbed at a time.

The invention discloses a positioning, alignment and forming method for the lower portion of a formwork of a vertical structure, and belongs to the field of concrete pouring of vertical building structures in engineering construction. The method comprises the steps that (1) a measurer conducts measuring and positioning on all surfaces of the bottom of the vertical structure at first, and chalk lines for installing a formwork are played on all the surfaces; (2) drilling is conducted by a concrete percussion drill along the chalk lines, the diameter of each hole is 12-14 mm, the distance between the adjacent holes on the same chalk line is 450-550 mm, the at least two holes are formed in each surface, the end of each surface is provided with one hole, and the depth of each hole is 50-80 mm; (3) a steel-bar pile with the diameter phi being 10-12 mm is driven into each hole and located on the outer side of each chalk line, the outer wall of each steel-bar pile is tangential to the corresponding chalk line, and 50-70 mm of each steel-bar pile is exposed out of the corresponding hole; and (4) the formwork of the vertical structure is installed in the mode of being attached to the steel-bar piles, and positioning, alignment and forming construction operations of the lower portion of the formwork of the vertical structure are completed in one time. Through the positioning, alignment and forming method, the technical problems that during formwork positioning and alignment in the prior art, construction is tedious, the efficiency is low, the labor intensity is high, and the construction quality is poor can be solved.

The invention discloses a machine tool disc chuck type centering device of a tool clamp and a centering method of the machine tool disc chuck type centering device. The machine tool disc chuck type centering device comprises a machine tool disc chuck, the tool clamp borne on the machine tool disc chuck, a plurality of positioning grooves formed in the machine tool disc chuck and a plurality of positioning blocks installed on the tool clamp, wherein the positioning grooves are uniformly formed along the center of the machine tool disc chuck, one end of each positioning block is in threaded connection with the tool clamp, and the other end of each positioning block is installed in the corresponding positioning groove in a sliding fit manner. According to the machine tool disc chuck type centering device and the centering method of the machine tool disc chuck type centering device, the principle that the cross centers of two objects coincide with each other is adopted, the machine tool disc chuck and the tool clamp can be rapidly and accurately aligned, and the centering error is greatly reduced.

The invention relates to an aligning protection device for a large-volume center roller flange. The aligning protection device comprises a frame, an inflatable roller and inflatable-roller drive components. The inflatable-roller drive components are arranged at two ends of the inflatable roller, and comprise safety chucks, central shafts and bearing blocks; the bearing blocks are arranged on the frame, and the central shafts are rotatably supported on the bearing blocks; one end of the inflatable roller is detachably connected with the safety chucks; each safety chuck is hinged to one end of the corresponding central shaft. The aligning protection device is characterized in that the aligning protection device further comprises alignment mechanisms, and each alignment mechanism comprise anencoder, an encoder connecting shaft and an encoder mounting support; the encoder mounting supports are arranged on the outer sides of the central shafts and fixedly connected with the frame, each encoder is fixedly connected to one end of the corresponding encoder connecting shaft, the encoders are located on the outer sides of the encoder mounting supports, and the other ends of the encoder connecting shafts are fixedly connected with the central shafts. The aligning protection device has the advantages of simple structure and capability of aligning the safety chucks.

The invention discloses an alignment and detection method and application of a semiconductor device, and the method comprises the following steps: S1, a semiconductor device is placed on an adsorption assembly for adsorption and fixation, a first CCD camera collects first image information of the top surface of the semiconductor device, a moving assembly moves the adsorption assembly according to the first image information, so that the side face of the semiconductor device is located in the measuring range of a horizontally-arranged first optical displacement sensor; S2, the first optical displacement sensor measures a first point A away from the side face of the semiconductor device, the moving assembly moves by a distance L along the Y axis, and the first optical displacement sensor measures a second point B away from the side face of the semiconductor device; s3, according to the height difference value of the points A and B and the distance L, the deflection angle alpha of the semiconductor device placed on the adsorption assembly is calculated, and the moving assembly rotates the deflection angle alpha to enable the semiconductor device to be in an orthogonal state. By means of the characteristic of high-precision distance measurement of the sensor, accurate alignment of the semiconductor device is achieved, and the method can be used for high-precision detection of the semiconductor device.

The invention provides a measuring ruler. The measuring ruler is characterized by comprising a first horizontal ruler, a second horizontal ruler, a vertical column and an angle ruler. The first horizontal ruler, the second horizontal ruler and the vertical column are perpendicular to one another, the first horizontal ruler is detachably connected with the vertical column, the second horizontal ruler is detachably connected with the vertical column, and the angle ruler is detachably connected with the first horizontal ruler, the second horizontal ruler or the vertical column. The invention designs a measuring ruler which has a simple structure and comprises components easily disassembled and reassembled by plugging. The horizontal deflection and the vertical deflection can be mechanically measured by changing the mounting position of the measuring ruler, the measuring ruler is small in size and convenient for storage and transportation, a technician can perform construction more conveniently, and later alignment is more precise.