The method of distribution pipe ends
(57) Abstract:The invention relates to the processing of metals by pressure and can be used in aviation, shipbuilding and related industries. The method of distribution pipe ends includes nataskivanie to punch billet. To ensure hydrostatic pressure in the internal material of the workpiece at her set outer tubular workpiece of greater thickness and made of a more ductile metal than the inner. The technical result of the invention is to increase the degree of variation in the distribution pipes. 1 Il. The invention relates to the field of metal forming, namely, stamping parts from billets, and can be used in aviation, shipbuilding and related industries.There is a method of distribution pipe ends, which consists in natakamani billet to the punch (Gorbunov M. Technology blanking and stamping operations in the manufacture of aircraft. M: mechanical engineering, 1981, page 114, Fig. 5.3). The disadvantage of this method is the following. When the deformation of thin-walled pipe blanks ultimate technological wash bumps) and the destruction of the front end of the workpiece.The closest analogue is the method of distribution pipes (A. C. 810343 the USSR, MKI 21 D 41/02. The method of distribution pipes pressurized/ C. I. Ershov, V. Glazkov, I., M. F. Kashirin, A. D. Kovalev (USSR)- 2726090/25-27; Statements. 20.02.79; Publ. 07.03.81, bull. N 9. -2C.), consisting in natakamani billet to the punch with an additional retaining device. The disadvantage of this method is also limited technological capabilities due to loss of stability in the form of an annular corrugation in the area of power transmission, as well as the complexity of the design overpressure to prevent destruction of the front end edge.The aim of the invention is to increase the degree of variation in the distribution of billets by eliminating buckling in the area of power transmission and destruction of the front end edge.To achieve this goal outside of billets before natalkivayet her to the punch, install additional pipe billet greater thickness with an inner diameter equal to the outer diameter of the main tubular workpieces and more ductile metal such as lead.Because while natakamani to punch two blanks from external workpiece, having a greater wall thickness (in three and beating in the material of the latter. The presence of hydrostatic pressure prevents breakdown of the front end edges of the inner tubular workpieces. In addition, the presence of external overpressure in the form of the outer pipe eliminates the possibility of buckling in the area of power transmission. All this leads to an increase to the limit of the distribution process of thin-walled pipes. The outer tubular workpiece is purely technological element, so it is advisable to make from plastic, workable material. Such material is, for example, lead. After deformation of the outer blank is easily melted for the next operation.The invention is illustrated in the drawing, which presents an installation for implementing this method, containing rigidly fixed to the bar 1, 2 and 3 main tubular workpieces, the yoke 4, is arranged to move the plug 5 mounted on the free end of the rod.The proposed method is implemented as follows.Outside the main tubular billet 3 install additional tubular workpiece 2 greater thickness with an inner diameter equal to the outer diameter of the main tubular workpieces,the nga 1, then on the free end of the rod 1 is fixed plug 5 and using beam 4 push both blanks to the punch. Simultaneously, the hand ends of both pipes. The degree of internal deformation of the workpiece is increased due to the exclusion of destruction front end and buckling in the area of power transmission. After deformation the additional workpiece is removed from the workpiece.The proposed method was tested in the distribution pipe with an inner diameter of 32 mm, wall thickness 1.5 mm, corrosion-resistant steel 12X18H10T. As an additional blanks were used tube made of lead with a wall thickness of 10 mm as a result of implementation of this process, the degree of deformation increased by 30%. The method of distribution pipe ends, comprising nataskivanie to punch tubular workpieces, characterized in that to ensure hydrostatic pressure in the internal material of the workpiece at her set outer tubular workpiece of greater thickness and made of a more ductile metal than the inner.
FIELD: plastic working of metals, possibly tube expanding.
SUBSTANCE: tool includes clamp mechanism having clamp cylinder and spacing rod arranged in it. Tool includes housing in which compression spring is arranged in such a way that its one end rests upon housing and other end rests upon end of clamp cylinder; force working member mounted inside compression spring and made of shape memory alloy. One end of working member is secured to housing; its other end is secured to spacing rod. Spring and working member are made with possibility of creation in common system of forces in which direction of summed vector acting upon spacing rod depends upon temperature of working member. Increase of working member temperature till value exceeding that of reverse martensite conversion causes generation of efforts transmitted to spacing rod due to shortened length of working member.
EFFECT: lowered cost price of labor, enhanced efficiency of tool.
FIELD: plastic metal working.
SUBSTANCE: invention can be used for sizing welded pipes of large diameter by expanding. Proposed method includes feeding of pipe cyclically at preset step to sizing tool of expander and its expansion at each cycle by means of sizing tool. During cycle which follows first cycle pipe is turned through angle whose value corresponds to value of deviation of pipe axis from straightness on section whose length is equal to pipe feed step at each cycle of expanding. Device is provided with holder with rollers on end face of sizing tool, axis of rotation of holder coincides with axis of sizing tool. Rollers are installed for movement in radial direction.
EFFECT: improved quality owing to provision of stability of geometric dimensions.
3 cl, 1 ex, 3 dwg
FIELD: plastic working of metals, working openings.
SUBSTANCE: method comprises steps of pulling broach through opening at tightness; at working deep openings and inner cone surfaces pulling broach through opening due to mutually screwing broach and arranged symmetrically along axis threaded rod to which blank is secured. Apparatus includes broach with threaded opening where threaded axially symmetrical rod is arranged. On outer surface of broach there is thread whose pitch exceeds that of internal thread. Threaded rod is used for joining with blank. Broach may have cone outer surface; its outer thread may be multi-start thread.
EFFECT: possibility for working deep openings, inner cone surfaces.
4 cl, 1 dwg
FIELD: well drilling equipment, particularly casing pipe repair, namely to increase diameter of shutters installed in wells and formed of steel pipes.
SUBSTANCE: device comprises body with pins and expander. Pins have flushing fluid channels. Expander includes two discs with working parts symmetric about device axis. Pins are made as rods with support ledges in central parts thereof and threaded ends. Discs are shaped as truncated sphere segments and are located from both support ledge sides. The discs are supported by friction bearings. Disc diameters in working expander position are equal to inner diameter of expanded pipe. Upper disc in working position cooperates support body surface and slides downward as device is lifted from well. Lower disc cooperates with support ledge.
EFFECT: increased quality of pipe expansion and reliability of device lifting from well, as well as extended operation time.
5 cl, 1 dwg
FIELD: plastic working of metals, possibly relief deforming of thin-wall cylindrical bodies made of sheet.
SUBSTANCE: apparatus includes attachment for holding body and preventing its rotation; tool for deforming body in predetermined zone of its lateral surface. Said tool is in the form of set of segments forming supporting surface of cylindrical shape. Each segment is in the form of 1/2 of cylinder cut diametrically along its axis. Segments may be moved in vertical axial direction and in horizontal radial direction by means of tool moving mechanism. Said mechanism is in the form upper and lower cones mutually joined through rod. Upper cone is fixed to rod and lower cone is mounted stationary. Segments are mutually bonded trough elastic members for providing their simultaneous movement.
EFFECT: simplified design of apparatus, simplified deforming process.
2 cl, 4 dwg
FIELD: plastic working of metals, possibly manufacture of annular blanks.
SUBSTANCE: method comprises steps of placing annular blank into cavity of die; upsetting it and expanding while performing upsetting stage due to creating inside blank hydrostatic pressure of incompressible hydraulic fluid; before placing annular blank, filling cavity of die with incompressible hydraulic fluid. Upsetting of blank and creation of hydrostatic pressure inside it are realized by means of punch. Spindle oil is used as incompressible hydraulic fluid.
EFFECT: improved quality of semi-finished product having no cracking.
3 cl, 1 dwg, 1 tbl, 1 ex
FIELD: mechanical engineering; manufacture of clutches.
SUBSTANCE: proposed plant contains housing, rod, pair of truncated cones, segments with guide slots, and drive. Said truncated cones are made with equal taper angles, being installed for axial displacement and pointed to each other by smaller bases. Segments with guide slots are installed for radial displacement. Truncated cones are provided with locks installed for travel in guide slots of segments and engagement with their inner surfaces. Plant is furnished with two bushings with slots and rack mechanism. Rod is made in form of drive shaft and is installed on housing for periodical demounting. One end of rod is connected with drive by splined joint. Truncated cones are installed on rod for axial displacement by means of thread. One truncated cone has right-hand thread and the other, left-hand thread. End faces of larger bases of truncated cones are provided with cylindrical projections with splines designed for fitting said projections in slots of bushings for axial displacement and engagement with inner surfaces of bushing slots. One of said bushings is rigidly secured on housing. Second bushing is secured coaxially with rod in rack mechanism for axial displacement.
EFFECT: possibility of expanding of clutch made of different materials.
5 cl, 2 dwg
FIELD: plastic working of metals, possibly manufacture of parts such as flanged tubes.
SUBSTANCE: method comprises steps of end expanding of hot part at deformation temperature less than that of forging and simultaneously expanding diameter of under-flange portion of tube blank and shaping flange in rotating annular die by means of inclined punch fed along axis of tube blank. Process of end rolling out is realized for producing parts having flange thickness less than that of wall of tube blank and under-flange portion of tube blank in the form of truncated cone or cylinder with diameter exceeding by 1.2 - 1.05 diameter of tube blank. Punch is fed by inclination angle 4 - 6° relative to axis of tube blank.
EFFECT: improved quality of parts.
SUBSTANCE: device contains sectional matrix with a sectional attachment placed inside, sectional punch with a sectional attachment placed on its cylindrical part, installed with the possibility of radial motion around a conical center hub connected with gearing of reciprocating axial movement, having a coaxially installed sliding cylinder of hydro-cylinders of reduction and rationing, crimp barrel placed on the sliding cylinder of hydro-cylinders of reduction from the outer side of the sectional matrix. The sectional punch has an elastic flange. The sectional attachments of the punch and of the matrix are extensible installed. At the same time, each sector of the sectional punch, the sectional matrix, and the sectional attachments is connected with the corresponding sectors of the partition, located on their tops at different sides, forming a groove between the corresponding sectors. Attachments of certain thickness are used.
EFFECT: increased processing accuracy and simplification of design.
1 ex, 2 tbl, 9 dwg
FIELD: technological processes.
SUBSTANCE: tool for pipe ends expansion, which consists of tail piece and working part of tool that is made in the form of roller with inlet cylindrical section, forming section, which is made as reciprocal to form of pipe expanded section, and support part. Mentioned roller is installed in bearing supports with the possibility of rotation in tail piece bore. At that roller rotation axis is installed at an angle to axis of tail piece rotation and crosses it in the point that is located in the plane of roller inlet cylindrical section end, which is installed perpendicularly to roller axis. At that diameter of inlet cylindrical section of roller is calculated by formula that considers internal diameter of pipe and angle of roller rotation axis to tailpiece rotation axis.
EFFECT: technological resources are expanded.