Stamp to obtain product type panels with ribs
(57) Abstract:The inventive stamp to obtain product type panels with ribs includes a movable and a fixed part connected pivotally at one end. At the free end of the movable part fixed the site of interaction with the actuator, consisting of a heel, the heel with a stove, earrings and finger. Movable and fixed parts are connected with racks mounted on the base and shaft. Part of the stamp is placed with a clearance of not less than the thickness of a cloth product. When lowering the movable part of the first stamping on the site of the final molding, then a plot of extrusion edges and end at the pre-moulding. 1 C.p. f-crystals, 3 ill. The invention relates to the processing of metals by pressure and can be used in forging and stamping upon receipt of long panels with ribs.It is known device, comprising the sequential deformation of the workpiece elements forgings while moving it in the axial direction by means of a set of paired dies .The disadvantage of this technical solution is the inability to apply Emenim attached full load what does not correspond to the structural features of the known device.The closest set of features is sheet metallocene stamp to obtain products with ribs , containing the base, the lower stationary part (matrix), cantilever bending portion (plug) connected to the fixed part can travel from the actuator in the vertical plane. The movement is in an arc of a circle that is drawn around an axis of rotation coincident with the attachment of the movable part to the stationary.The disadvantage of this device is its applicability to process only sheet blanks of limited length.The proposed device allows to increase the thickness of stamping blanks, using the rolled plate, and its constructive approach makes possible to obtain panels of large dimensions ad hoc length.This is achieved by the fact that the stamp containing the base, the stationary part and cantilever bending part connected with the fixed part can travel from the actuator in the vertical plane, equipped with a site of interaction with the actuator placed on svobodnoradikal plane of movement of the movable part, and connected with a fixed part of the hinge with racks mounted on the base, and a shaft freely mounted in the through hole of the movable part and the fixed ends in the uprights, while the movable part is positioned relative to the fixed part with a gap having a vertical plane passing through the axis of rotation of the movable part, an amount not less than the thickness of the product.The site of interaction with the actuator can be made in the form of thrust bearing mounted on the movable part can move in the direction perpendicular to the shaft, and abutment with the plate associated with the base of the guide columns, and the surface interaction of abutment with the thrust bearing is cylindrical with a generatrix parallel to the shaft.In Fig. 1 depicts a stamp in the axonometric projection of the slit along the longitudinal axis in the lower working position (without the heel and the toe), and Fig. 2 - section a-a in the lower working position (the dotted line shows the non-operating position of the stamp), and Fig. 3 - section b-B in Fig. 2.The stamp includes the base 1, the stationary part 2, the movable part 3, stand 4, the shaft 5 with a cylindrical middle part and square ends 6. The movable part 3 vypolnennoi cross member 8, perceiving the load transmitted by forging through the bending section 3, the shaft 5 and 4 hours.The movable part 3 is posted relatively stationary with a gap 9, the value of which exceeds the thickness of the blade. The stationary part to the movable part forming stream 10 preliminary forming a stream 11 of the extrusion rib stream 12 final moulding. At the free end of the movable part 3 is fixed thrust bearing 13 with a cylindrical recess 14 that communicates with the fifth 15, the plate 16, which is fixed to the traverse of the press (not shown). The thrust bearing 13 mounted in the slots 17 of the movable part 3 and is connected to the fifth 15 by means of two earrings 18 and the fingers 19. The plate 16 is connected to the base 1 by means of guide columns 20 and guide bushings 21.Stamp works as follows.The free end of the movable part 3 is raised to its original position (Fig. 2, dotted lines). The workpiece is fed into the gap 9 between the movable and stationary parts in the direction of arrow B (Fig.1). Then, after lowering the plate 16 of the thrust bearing 13 under the influence of heel 15 slides its cylindrical surface 14 of the cylindrical surface of the thrust bearing 13 and moving in the slots 17, is lowered together with the movable part 3.The stamp is ready for use. The billet is pushed through the gap 9 in the axial direction on the step, the value of which is less than the length of uformowaniu plot, and is 2/3-3/4 the length of the latter.The use of the proposed device production can receive long panel by stamping on universal vertical hydraulic presses, relaxing the tension production programs in use for the same purpose specialized horizontal presses. At the same time realized the possibility of obtaining panels of a width of 960 mm, which is the limit for existing horizontal presses. 1. STAMP TO OBTAIN PRODUCT TYPE PANELS WITH RIBS, containing the base, the stationary part and cantilever bending part connected with the fixed part can travel from the actuator in the vertical plane, characterized in that it is equipped host interaction with the actuator placed at the free end of the movable part, the movable part is made in the form of W is connected with a fixed part of the hinge with racks, mounted on the base, and a shaft freely mounted in the through hole of the movable part and the fixed ends in the uprights, while the movable part is positioned relative to the fixed part with a gap having a vertical plane passing through the axis of rotation of the movable part, the amount not less than the thickness of the product.2. Stamp on p. 1, characterized in that the site of interaction with the actuator in the form of thrust bearing mounted on the movable part can move in the direction perpendicular to the shaft, and abutment with the plate associated with the base of the guide columns, and the surface interaction of abutment with the thrust bearing is cylindrical with a generatrix parallel to the shaft.
FIELD: plastic working of metals, possibly manufacture of parts with shaped contour, for example polyhedral parts.
SUBSTANCE: method comprises steps of forming round cross section semi-finished product; embossing its surface for forming relief in the form of alternating protrusions and recesses and shaping curvilinear contour of said relief. Size of shaped contour corresponds to size of profile of ready part. Diameter of described circle passing through apexes of curvilinear protrusions is selected in range consisting of (1.15 - 1.35) of diameter of inscribed circle passing through apexes of recesses of part. Curvilinear contour of protrusions and recesses is shaped due to acting upon semi-finished product by means of shaping tool having profile of working surface in the form of curvilinear protrusions. The last have curvature radius with curvature centers spaced from part symmetry center by distance exceeding by 1.65-1.8 times distance from said symmetry center till curvature centers of curvilinear protrusions of part. Curvilinear recesses are alternated with curvilinear protrusions on working surface of shaping tool. Diameter of described circle passing through apexes of said recesses consists (1.15 - 1.35) of diameter of inscribed circle passing through apexes of curvilinear protrusions.
EFFECT: enlarged manufacturing possibilities of method and apparatus.
8 cl, 8 dwg
FIELD: plastic working of metal, possibly forming on inner surface of tubular blanks with bottom multi-stat helical riffles of mutually opposite directions at manufacturing fragmentation type envelope of ammunition.
SUBSTANCE: riffles form grid of rhombic protrusions. In order to form such riffles, tubular blank is reduced by two successive operations. At each operation tubular blank and punch with helical protrusions are together pulled through sizing die. Each operation is realized at least during two transitions while punches whose length is multiply less that length of blank are used. Common pulling through of blank and punch during first transition of each reduction operation is realized while punch rests upon bottom of blank. Between transitions at each reduction operation punch is unscrewed from blank with formed helical riffles for forming between punch and blank band of engagement of helical protrusions of punch and helical riffles of blank. Said band is used at next reduction transition for resting punch and for providing desired direction of formed helical riffles.
EFFECT: enlarged functional and manufacturing possibilities of method.
SUBSTANCE: hollow cylinder stock is brought with its not subject to treatment end to clamping device and fixed in it. After that a mandrel with a coaxially inserted and lengthwise set off spike is introduced into the end of the zone of the stock, subject to treatment. Its free end passes up to the clamping device. The end of the spike is brought after that in an axial direction of the stock into contact with geometric locking with the clamping device. The mandrel together with the clamping device and stock are axially passed through a stationary technological position. To facilitate inside and, if necessary, outside profiling, the surface of the stock along the section subject to treatment is radially effected in this position. The device contains the first and axially installed to it the secondary spindle straddles, axially set off to the first spindle straddle mandrel and the stationary technological position with cold fabrication tools for operating radially to the axis of the straddle. The clamping device is located coaxially against the axis of the first straddle and it is designed to be set off against the technological position. At that the technological position is situated stationary between the spindle straddles. There is also the movable spike axial-symmetrically situated inside the mandrel.
EFFECT: extended technological capabilities.
24 cl, 7 dwg
SUBSTANCE: present invention pertains to military equipment and can be used when making high-precision small arms. A mandrel bar or puncheon is put into the channel of barrelled work-piece and a channel with grooves is formed through rotary forging or drawing. The surface of the work-piece channel is pre-activated and then coated with a composition. The composition assumes functions of lubricant material and provides for a wear-proof coating when making the channel with grooves. The composition contains a mixture of homogeneous and heterogeneous catalysts and dispersion reinforcement systems in viscous carrier and natural minerals in the class of carbonates, halogenides, sulphates, silicates and oxides with combined concentration of 20-40 wt %. The natural minerals are modified until formation of a porous layer of minerals on the surface of the channel, forming hydrophilous-hydrophobic splices, filled with organic ligands. The work-piece then undergoes thermal processing for 2-4 hours at 130-140°C, after which a channel with grooves and a wear-proof coating are simultaneously formed.
EFFECT: reduced labour input in manufacturing with improved tactic-technical and operational characteristics of the barrel at the same time.
2 cl, 5 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and can be used in production of ribbed panels intended for bodies of compartments, bulkheads, wings and other parts of aircraft and spacecraft. Heated blank is strained at the rate of 0.01-10 mm/s, in steps over the sections, with gradual forming of the entire surface. Area of said sections is at least two times smaller than that of said blank. Straining is executed at the device to be secured in die unit for isothermal die forming. Proposed device comprises top and bottom plates, heaters, female die, male dies with cavities shaped and sized to panel ribs and at least two male die holders. The latter displace in guide columns. It includes sliding thrust plates with drive. One male die is rigidly fixed in male die holder. Other male dies are fitted in their holders and spring-loaded and can displace in direction of forming force application.
EFFECT: enhanced processing performances.
2 cl, 5 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may in production of hexagonal sections by radial forging. Blank is squeezed by two mutually perpendicular airs of flat dies. Working surfaces of flat dies of one pair are shifted along hammering axis relative to those of another pair. Magnitude of said shift is larger than the length of flat die working surface. Flat dies of one pair have smooth working surface. Flat dies of another pier feature working surface composed of cut passes with surfaces arranged at 120 degrees. Said cut passes are shifted relative to each other to get hexagonal section at next to last forging pass in said cut passes with different spacing there between. Spacing between working surfaces of flat dies with smooth working surface is set smaller then the least distance between hexagon faces made at next the last pass. Blank before final pass is turned over through 60 degrees to set said faces at larger spacing there between from the side of flat dies with smooth working surface.
EFFECT: higher quality of sections.
4 dwg, 1 ex
SUBSTANCE: cyclic swaging of a workpiece is performed simultaneously with two mutually perpendicular pairs of strikers. A hexagonal section is obtained in each cycle. Strikers of one pair has a smooth working surface. Strikers of the second pair have cutout grooves with surfaces inclined to each other at an angle of 120°. Working surfaces of mutually perpendicular strikers are offset relative to each other along a forging axis by a value exceeding the length of the working surface of the striker. Swaging of the workpiece in each cycle, except for the first one, is performed by a value that does not exceed difference of diameters of the described circle of the hexagonal section obtained in the previous cycle, and an inscribed circle of the hexagonal section obtained in the considered cycle. After each cycle, the workpiece is turned about the forging axis through angle π/n, where n=6 - number of faces of a hexagonal section.
EFFECT: obtaining quality hexagonal sections at enlargement of the range of initial workpieces and obtained items.
SUBSTANCE: round blank is swaged by two mutually perpendicular die pairs. One die pair has smooth work surface, the other die pair features carved grooves on the work surface. Side surfaces of carved grooves are oriented at 120° angle to each other. Work surfaces of dies are shifted against each other along forging axis. First, round blank is swaged by the die pair with smooth work surface in several deformation cycles. Each cycle includes several runs. Thus, octagonal profile is obtained. Ratio of inscribed circle diameter of this profile to side surface length of carved groove in a die does not exceed 1.93. In each deformation cycle, the blank is turned around its axis before each run in sequence at π/2, π/4 and π/2 angles. Before each deformation cycle, gap between work surfaces of dies with smooth surface is reduced. Finally, swaging is performed with two die pairs at the same time to obtain hexagonal profile.
EFFECT: extended processing capabilities of radial forging to obtain high-quality hexagonal profiles.
FIELD: technological processes.
SUBSTANCE: invention can be used for production of shells with grid of grooves on inner surface. On inner surface of hollow billet grid of corrugated grooves are shaped by female die for pressing with conical working surface with taper angle of 10-45° and central mandrel with mesh of corrugated ledges. Forming grooves is carried out successively in sections. At that, on hollow billet form conical section is formed by crimping of latter with crimping factor of K = 1.2…1.8. For this purpose, hollow billet is pushed through matrix for pitch multiple to workpiece length. Corrugated ledges of rod working surface made with taper angle of 10-45°, are introduced into inner surface of workpiece conical section. Said conical section is formed with mesh corrugated grooves into cylindrical section. Shaping is performed by moving hollow billet in axial direction at pitch with simultaneous forming of next section of conical shape on it.
EFFECT: production of grid of grooves of various shape and dimensions with simultaneous reduction of number of operations.
2 cl, 3 dwg, 1 ex
FIELD: metal processing.
SUBSTANCE: invention relates to metal forming and can be used in radial forging of hexagonal hollow profiles. Round hollow workpiece is subjected to reduction simultaneously with two mutually perpendicular pairs of strikers in not less than three passes. Strikers of one pair have smooth working surface. Strikers of second pair have cutout grooves with surfaces inclined to each other at an angle of 120°. Working surfaces of mutually perpendicular strikers are offset relative to each other along forging axis by a value exceeding length of working surface of striker. After each pass, workpiece is turned about forging axis through an angle which is a multiple of 60°, to change faces hexagonal hollow profile pressed by pairs of strikers.
EFFECT: higher quality of hollow profiles.
1 cl, 8 dwg, 1 ex