57results about How to "Reduce clamping deformation" patented technology

The invention relates to the technical field of circular hole machining and particularly relates to an indexing jig device for a radial hole in a cylindrical face. The indexing jig device comprises a jig body and a workpiece, wherein a locking bracket and a mandrel bushing are arranged in the jig body, a locating mandrel is arranged in the mandrel bushing and is provided with an opening pressing plate and a rotary indexing disc, and the jig body is provided with a jig bush rack. The indexing jig device has the advantages that the labor production rate is increased greatly, the labor intensity of operating workers is lowered, the wear and tear of a drill bit is reduced, the service life of a cutter is prolonged, and the clamping deformation of the workpiece is little, and the effect is very good.

The invention relates to a method for machining a thin-wall sleeve type part through a wedge type inner supporting mechanism. The method includes the following steps that rough machining is conducted on the outer circle face, the inner circle face and the end face of the sleeve type part; heat treatment is conducted on the sleeve type part obtained after rough machining, and the roundness deformation of the sleeve type part is controlled to be within 2 mm; semi-finishing is conducted on the outer shape face, the inner shape face and the end face of the sleeve type part; an opening of the sleeve type part is machined; and finish machining is conducted on the outer shape face, the inner shape face and the end face of the sleeve type part to reach the design sizes. According to the method, the phenomena of chattering, cutter relieving, the uneven wall thickness, deformation and the like when the outer circle of the part is turned can be avoided, and the qualification rate of the part can be improved to 97% or above from 70%.

The invention discloses a turning method of a long thin wall composite shell body formed by metal and glass fiber reinforced plastics. The method comprises the steps that (1) glass fiber reinforced plastics outer circle rough turning is carried out; (2) the two end faces of the shell body are subjected to rough turning; (3) glass fiber reinforced plastics outer circle fine turning is carried out; and (4) the two end faces of the shell body, an inner hole and an annular groove are subjected to fine turning. Rough-fine machining processes are used, technology allowance is distributed reasonably, deforming amount is controlled, metal shell inner hole accuracy is controlled and is used as the machining standard of a structure piece after recombination, an end cap and a soft claw are used for clamping, clamping deforming is lowered, through a low-temperature cold air cooling mode, a cutting environment is improved, a tool and cutting parameters during cutting machining are stipulated, product tool service life is prolonged, and machining efficiency is improved. The technology method is reasonable and reliable, product deforming is small, and the machining quality of the composite shell body can be effectively guaranteed.

The invention provides a fixture for machining annular parts and a method for machining the parts through the fixture. The fixture comprises a supporting base provided with a boss on the top. The boss is provided with three supporting columns, and the lengths of the three supporting columns are sequentially reduced. A pressing plate is installed on the top of the supporting column II. The pressing plate is pressed on the top of the supporting column II through a pressing block installed on the supporting column I. The bottom of one end of the pressing plate and the top of the supporting column III are matched to clamp the parts to be machined. The position of the pressing plate is adjusted through cooperation of the three supporting columns, and the pressing plate and the supporting column III are matched to press the parts to be machined, so multiple fixtures can be matched to clamp some annular parts inconvenient to fix, the fixture can be adjusted to adapt to parts in different sizes, machining errors caused by elastic deformation generated due to clamping and radial fixing when the annular parts are fixed are avoided, and machining precision of the annular parts is improved.

The invention provides a machining method for a thin-wall circular ring part. According to the method, a procedure of eliminating internal stress annealing is added in the machining process, the cutting machining performance is improved, and stress deformation in the machining process is eliminated; and meanwhile, end face pressing is adopted when a workpiece is clamped, and clamping deformation of the workpiece and vibration in the machining process are avoided. According to the machining method, a 90-degree tool cutting edge angle tool is used for machining, generation of cutting heat and vibration in the cutting process are reduced, and therefore thermal deformation is reduced, the surface roughness and the size precision of the workpiece are improved, machining deformation of the partis well controlled, and the machining quality and the machining efficiency of products are guaranteed.

The invention discloses a multifunctional vertical zero overlapping scanning interferometry device which comprises a main control unit, a drive control circuit and an air floatation vibration isolation base. A stand column and a four-dimensional motion adjusting platform are arranged on the air floatation vibration isolation base, a vertical lifting shaft is arranged on the stand column, and a laser wave surface interferometer is arranged on the vertical lifting shaft. A detachable CGH five-dimensional motion combination adjusting platform is arranged on a light output path of the laser wave surface interferometer, the CGH five-dimensional motion combination adjusting platform is located over the four-dimensional motion adjusting platform, and the control end of the CGH five-dimensional motion combination adjusting platform and the control end of the four-dimensional motion adjusting platform are connected with the main control unit through the drive control circuit. And the control end of the laser wave surface interferometer is connected with the main control unit. According to the invention, high-precision and high-efficiency measurement of a large-aperture plane, a spherical surface and a convex aspheric surface can be realized, zero measurement of the plane, the spherical surface and the aspheric surface can be flexibly carried out, and high-efficiency and high-precision detection of a large-aperture optical surface shape is realized in combination with automatic control.

The invention discloses a positioning and clamping device for automobile hub outer flange processing and relates to the field of automobile hub processing. The positioning and clamping device comprises a chuck and three clamping pieces which are arranged on the top surface of the chuck in an annular shape around the axis of the chuck, and the three clamping pieces can synchronously stretch out anddraw back radially along the top surface of the chuck. The positioning and clamping device is characterized in that each clamping piece comprises a fan-shaped clamping jaw, the outer wall of each clamping jaw is provided with a plurality of steps which are arranged in the axis direction, the outer walls of different outer diameters of the clamping jaws are used for clamping the inner walls of automobile hub outer flanges in different sizes, the positioning and clamping device further comprises a positioning device arranged on the chuck, the positioning device comprises a plurality of bolstering blocks and angle positioning blocks, and the height of the bolstering blocks is adjustable so as to be flush with different step surfaces of the chuck. Clamping of the inner wall of an automobile hub outer flange can be realized, the processing accuracy can be improved, the clamping deformation of the automobile hub outer flange can be reduced, and the automobile hub outer flange of different model sizes can be conveniently processed.

Provided is a special processing device of an injection machine moulding board. According to the special processing device, a top plate and a transition plate are fixedly connected. The injection machine moulding board is located through two locating pins on the top plate so that inclination or loosing of the injection machine moulding board can be prevented and locating accuracy of processing can be improved. Footing of the injection machine moulding board is tight attached to the top plate. A clamping surface is a footing surface of the injection machine moulding board, and clamping deformation of the injection machine moulding board is effectively reduced. A locking bolt hole is designed to be on the outer side of the transition plate, amplitude of swinging of a locking wrench can be increased, locking force is guaranteed, and convenience is brought to operation.

A universal flexible clamp for thin-walled parts is mainly composed of a right pressing disc, an axial spring, a supporting ring, an ejection rod, a spring, a supporting fan, a screw, a nut, a spacerring, an ejection ring, a right pressing disc, an adjusting washer, a rotary nut, a supporting shaft and the like. An internal thread is machined on a center hole of the right pressing disc. An external thread is machined at the right end of the supporting shaft, and the right end of the supporting shaft is fixedly connected with the right pressing disc in a threaded mode. The left end of the supporting shaft is sleeved with the left pressing disc. The adjusting washer is mounted between the nut and the left pressing disc. Two radial supporting mechanisms are arranged on the supporting shaft in the axial direction, located between the supporting shaft and the left pressing disc and mainly composed of an internal stop nut, a T-shaped connection groove, a supporting piece, a screw cap, a nut, an upward-pulling spring hanger, a supporting spring, a downward-pulling spring hanger, a groove and the like. The universal flexible clamp is simple in structure and low in production cost, clamping deformation of the parts is reduced, and the production efficiency and quality stability of the thin-walled parts are improved.

The invention provides a vacuum adsorption clamp and an adsorption method for clamping a thin-wall spherical shell type micro component, and relates to the technical field of clamping of thin-wall spherical shell type micro components. The vacuum adsorption clamp and the adsorption method are provided for solving the problems that in the machining process of uniformly distributing micro pit structures on the whole surface of the thin-wall spherical shell type micro component, an existing clamping mode is difficult to operate, a control part is complex, consequently, spherical shell deformation is large, and the repeated positioning precision is low. According to the technical key points, a vacuum suction head is detachably connected with the adsorption end of a vacuum adsorption clamp body in a sealed mode, and the hole diameter of a vacuum cavity in the vacuum adsorption clamp body in the axial direction of the vacuum adsorption clamp body is decreased from the connecting end to the adsorption end; and the vacuum cavity serves as a main air source channel, and an auxiliary air source connector communicating with the vacuum cavity is formed in the vacuum adsorption clamp body. When the vacuum adsorption clamp is adopted to adsorb the thin-wall spherical shell type micro component, the specific structure shape of the suction head and the vacuum negative pressure are calculated and checked. A clamp chuck is suitable for flexibly adjusting the vacuum degree according to the deformation condition of a thin-wall spherical shell, that is, the suction force of the clamp chuck is adjusted, clamping deformation is reduced, and the machining precision is guaranteed.

The invention belongs to the mechanical technical field and provides a control method of grinding distortion of the outer diameter of a guide barrel of an auto bank unit of a helicopter. The control method comprises the following steps of measuring a distortion high-low point area on a rough machining surface of a part and manually polishing a high point area and a transitional area correspondingto a positioning surface of the part; and adjusting a clamping force of a tightening bolt in the positioning hole of the machined part to improve the clamping distortion of the part. In the machiningprocess, the method guarantees that the precision of the positioning surface of a thin-walled sprayed part meets a 100%grinding demand and increases the contact area of the part and a tool and reducesthe clamping distortion of the part by controlling the clamping force in the distortion area, and further has a self-remedy improving function to grinding distortion of the part to a certain extent.The machining precision and the percent of pass of the part are improved.

The invention discloses a pulley support machining clamp and machining method. The machining clamp comprises a base, a pressing plate, a screw and a nut, a continuous supporting face is arranged on the surface of the base, and the supporting face extends from a mounting side hole in the left end of a pulley support to a mounting side hole in the right end of the pulley support. During machining, two datum planes are linearly cut on a pulley support casting blank, then the pulley support is clamped through the clamp, a support left end arc-shaped face and a support right end arc-shaped face are milled on a five-axis numerical control milling machine, then a bearing mounting end face is milled, a pin shaft hole is drilled and bored, and finally the mounting side hole is drilled. The machining clamp is simple in structure and firm in clamping, the pulley support is not prone to deformation and easy to measure, by means of the machining method, machining of all machining elements can be completed through one-time clamping, the machining efficiency is high, and the quality is guaranteed.

The invention belongs to the field of machining, and relates to an external grinding machining device for a thin-wall non-metal part with an inner ring groove and a clamping method. The external grinding machining device comprises a mandrel, a bushing and a nut, wherein the bushing and the nut are sequentially arranged on the mandrel in a sleeving mode; the bushing is a bidirectional concave bushing and is of an annular cylinder structure, grooves are formed in the two end faces of the bushing, the longitudinal section of the bushing is in an I shape, and exhaust holes are formed in the bushing; and the external grinding machining device further comprises a first gasket and a second gasket which are arranged on the mandrel in a sleeving mode and arranged at the two ends of the bushing correspondingly, and the first gasket and the second gasket are the same in size and structure. According to the external grinding machining device for the thin-wall non-metal part with the inner ring groove and the clamping method, the specially-designed bidirectional concave bushing, the inner wall and the groove bottom of the inner ring groove of the part and the right end face of the part are positioned and clamped, and the mandrel is used for auxiliary positioning, so that the problems of uneven clamping stress and grinding deformation are solved, the qualification rate of the part is improved, and the stable and reliable quality is ensured.

The invention relates to a planet differential type automatic moment varying electric control device. The planet differential type automatic moment varying electric control device solves the problemsthat an existing automobile part automatic frock clamp is complex in structure, and inconvenient to maintain or replace later. The planet differential type automatic moment varying electric control device comprises a fixing bottom seat, a micro motor, a planet wheel assembly, a thread differential motion assembly and a pressure sensor, wherein the planet wheel assembly comprises a sun wheel, an axle type planet carrier and planet wheels, the thread differential motion assembly comprises a top cover, a differential thread sleeve and a differential thread inner gear ring, the sun wheel is connected with an output shaft of the micro motor, the planet wheels are arranged in the peripheral direction of the sun wheel, and respectively engaged with the sun wheel and the differential thread innergear ring, inner teeth of the differential thread inner gear ring are engaged with the planet wheels, an external thread at the top end of the differential thread inner gear ring is engaged with the top cover arranged on the periphery of the differential thread inner gear ring and the axle type planet carrier, an external thread at the bottom end of the differential thread inner gear ring is engaged with the differential thread sleeve, the axle type planet carrier is connected with the top cover through a thread, the top end of the axle type planet carrier stretches out of the top cover, and the pressure sensor is arranged at the bottom end of the differential thread sleeve.

The invention provides a variable-diameter thin-wall plastic inner container vacuum adsorption clamp. The requirements for clamping position precision and roundness during secondary machining of a thin-wall plastic inner container are considered, and the clamping precision is improved while the roundness of the inner container is guaranteed. The vacuum adsorption clamp is mainly characterized in that three vacuum adsorption V-shaped blocks which are evenly arranged on the circumference are installed on three synchronous hydraulic cylinders, and small adsorption discs are evenly arranged on the three vacuum adsorption V-shaped blocks. For thin-wall plastic inner containers with different diameters, when the synchronous hydraulic cylinders move and the vacuum adsorption V-shaped blocks are clamped, the two groups of small adsorption discs on each vacuum adsorption V-shaped block are always tightly attached to the outer wall of the inner container; and meanwhile, the other small adsorption discs which are not attached are closed. The small adsorption discs share one vacuum pipeline, after vacuumizing of a vacuum pump, adsorption force is evenly distributed on each small disc, and due to the fact that the vacuum adsorption V-shaped blocks are evenly distributed in the circumferential direction, the adsorption force of the discs is offset, and clamping deformation caused by uneven clamping force to the inner container is avoided.

The invention discloses a magnetic fixture adopting coating clamping. The magnetic fixture comprises a bottom-closed outer cover cylinder, a workpiece tray, a steel ball accommodating tank, a ring separation plate, a first electromagnet, an electromagnetic oscillator, a steel ball circulating pump, a pump driving motor and a supply pipe; the outer cover cylinder is provided with an inner cylinderedge; the first electromagnet is fixed at the middle part of the steel ball accommodating tank through a magnet protective cover; the workpiece tray is fixed on the magnet protective cover; reflux holes are formed in the bottom of the workpiece tray at intervals; dispersion holes are formed in the upper end of the ring wall of the workpiece tray at intervals; a control valve is arranged on the outer wall of the workpiece tray; an annular dispersion cavity is formed among the ring separation plate, the outer wall of the workpiece tray, the inner wall of the outer cover cylinder and the inner cylinder edge; the dispersion holes communicate with the dispersion cavity; one end of the supply pipe communicates with the steel ball circulating pump; and the other end of the supply pipe communicates with the dispersion cavity. The magnetic fixture can adapt to magnetic workpieces and nonmagnetic workpieces, so that the application range is greatly widened, and the clamping work efficiency is improved.