Method and upsetting device for manufacturing of ledged parts, such as shafts and rods

FIELD: metallurgy.

SUBSTANCE: invention refers to pressure processing of metals and can be applied in manufacturing of parts in the form of a rod with flanges. Heated ingot is deformed in a moulding machine in stages. At the first stage of deformation, a rod workpiece is obtained with a diameter equal to finished part diameter. At least one next stage involves upsetting of at least one flange on the rod workpiece, with the final flange diameter exceeding the rod workpiece diameter.

EFFECT: possible manufacturing of parts with improved parameters out of ingots of different sizes.

11 cl, 6 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: initial blank is heated and plastically deformed by press using two operations. During first operation the semi-finished forging is manufactured with height below 0.5 of press slide stroke. This forging has flange and closed cavity. For this in the closed stamp the simultaneous settling of the initial blank, cavity broaching and flange forming are performed. The cavity and forging bottom are finally formed during the second operation by the reverse extrusion in the open stamp.

EFFECT: possibility to manufacture at the striking press the forgings with height over 0,65 of the press slide stroke.

3 cl, 2 dwg

FIELD: metallurgy.

SUBSTANCE: initial tubular billet is placed in first mould female die to form semi-finished product including cylindrical part, neck and adjoining flange by reverse and radial extrusion. Initial billet wall depth is selected subject to semi-finished product cylindrical part wall depth Produced semi-finished product is subjected to local heating to 1150-1100°C at cylindrical part. Them spherical part of semi-body is formed by expansion of heated part of semi-finished product at second mould at spherical male die.

EFFECT: higher strength of finished products.

5 cl, 2 dwg

FIELD: metallurgy.

SUBSTANCE: preliminarily swaged blank is pressed out into tapered part of matrix and it is received preliminary forging with flange of required dimensions, conical flange part and preliminary outline for reach-through hole. Preliminary outline allows forming angle at the side surface. Tapering of flange part of preliminary forging exceeds tapering of flange part of final forging. Then it is implemented punching of final forging with shaping of conical flange part, allowing undeviating reach-through hole. Mentioned shaping is implemented by means of cut off of forming slope and crosspiece broaching. These operations are implemented simultaneously with distribution and elongation of flange part and calibration of reach-through hole.

EFFECT: reduction of metal consumption and reduction of straining effort while punching.

4 dwg

FIELD: plastic metal working, possibly manufacture of forged blanks with rod.

SUBSTANCE: method comprises steps of heating cut off initial blank; forming semi-finished product from it and realizing final open forging and trimming fins. Semi-finished product is formed stage-by-stage beginning from rolling part of initial blank then subjected to forging. Rod portion of semi-finished product is formed by rolling; its volume consists 0.8 - 1.2 of volume of rod portion of ready forging. During forging process rod portion of semi-finished product is finally formed. Bulged flange is formed, mainly of remaining non-deformed part of blank.

EFFECT: production of forging at lowered efforts and reduced metal consumption.

9 cl, 2 dwg, 1 ex

FIELD: plastic metal working, possibly manufacture of forging with rod.

SUBSTANCE: method comprises steps of heating cut off initial blank, forming semi-finished product and finally forging it. Semi-finished product is formed at first by rolling part of initial blank and then subjecting it to forging. Rod portion of semi-finished product is formed by rolling; volume of said portion consists 0.8 -1.2 of volume of forging rod. Rod portion of semi-finished product is formed by finish forging process. Flange thickened portion of semi-finished product is formed, mainly from remaining non-deformed part of blank. Then blank is finally formed in closed die set.

EFFECT: lowered effort for making forging at reduced metal consumption.

9 cl, 2 dwg, 1 ex

The invention relates to the processing of metals by pressure and can be used in the manufacture of hollow flange forgings by forging

The invention relates to the processing of metals by pressure

FIELD: process engineering.

SUBSTANCE: invention relates to cold massive forming and can be used for production of rod parts of ball pin-type with hollow head. At first job, solid cylindrical blank is subjected to crosswise-straight extrusion to get rod-like semi-product smoothly changing into hollow part. Hollow part OD equals maximum diameter of finished ball pin head. At the next job, semi-product is reduced to form conical-cylindrical rod part of said ball pin. Sizes of said part comply with those of finished ball pin. Then, semi-product hollow part is reduced to get hollow spherical head of ball pin.

EFFECT: higher quality of finished products, longer life of tools.

4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to forming of rectangular- or round-cross-section rods and can be used in production of railway car hinges other rod-like parts with misaligned bulge. Blank with end inclined is cut from the rod inclined to rod axis. Blank is placed into female die so that inclined end obtuse angle is directed to bulge eccentricity. Then, blank end extending beyond said female die is headed by flat male die or male die with misaligned cavity.

EFFECT: ruled out flaws like jams, decreased allowance for head machining.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy and may be used in aerospace engineering, chemical machine building, ship building, automotive industry for making rod-type parts with heads from titanium alloys. After heading, workpiece heat treatment, machining and hardening bolt head filler, thread is cut. Thread is cut on workpiece heated to temperature some 350°C-200°C lower than that of cell formation that occurs in recovery after teat treatment.

EFFECT: ruled out defects in thread cutting, high-quality high-strength bolts of titanium alloys.

1 tbl, 4 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy and may be used at making rods with heads from titanium alloys. Billets are subjected to thermal treatment to perform hot heading. After heading thread is cut and head fillet is hardened. Thread is cut in two steps. First, preliminary incomplete knurling is performed after tempering of billets with deformation. Said deformation is defined by percentage between formed tooth thread depth to required depth to make 85-98%. Then workpiece is age-hardened to perform final thread cutting.

EFFECT: high strength bolts from titanium alloys with flaw-free thread, lower production costs.

3 cl, 1 tbl, 6 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and maybe used for production of wheel fasteners. Billet is cut to pre-head cylindrical head in diameter equal to that of hexagon circumscribing circle at first step of forming. At second step, rod and hexagonal head with edging for flange are reduced. At third step, hexagonal head and flange are finally headed while rod is gaged for thread cutting and facet is formed at its end. All jobs including thread cutting are made at one multi-position cold heading machine.

EFFECT: higher quality of bolts and tool durability, decreased metal input.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and maybe used for production of fasteners for space engineering. In making said fasteners, used is the workpiece with oxalate coating applied on its surface. Workpiece diameter makes 1.06-1.12 of fastener diameter. Heading is carried out, bolt body is reduced, circular transition for head and body is rolled. Then, thread with vee having rounded radius equal to 0.14-0.17 of thread pitch is cut. Bolt body is reduced at the rate of 0.2-1.5 m/s.

EFFECT: higher cyclic durability and strength.

2 cl, 1 tbl, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used for production of cup with flange parts. After cutting the billet, head is pre-upset, rod is pre-reduced and cone is formed at rod part adjoining cylinder part under head. Angle of cone being formed equals that of finished cone. Note here that in pre-reduction, conical section is formed by reduction to have length Lp≤din combine with upsetting of conical part with length L0≤dm where dm is diameter of rod part adjoining ball head. Billet diameter dbl is selected from the relationship dbl=(0.8…0.95)dm. At second position, second pre-upset of head and final reduction of rod are carried out along with cone forming. At third position, ball head if finally upset.

EFFECT: higher strength and quality.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used in forging eternal bolts for rail joints at multistation automatic press in four steps. At first step, head with cylindrical section and truncated cone section with two flat faces are formed. At second step, rectangular-section head with prism-shape recess at end surface is formed. Angles of prism side faces to head end surface make 5-8 degrees. Recess height makes 0.10-0.15 of the height of finished head. At third step, head is finished to form a radial fin. Note here that recesses at end face are shaped to tetrahedral truncated pyramid. Pyramid height makes 0.20-0.30 of the bolt head height. Angle of face inclination to end face surface in plane crossing larger axis of symmetry of rectangle makes 25-35 degrees. Angle of face inclination to end face surface in plane crossing smaller axis of symmetry of rectangle makes 80-85 degrees. At fourth step, fin is cut off.

EFFECT: higher quality and efficiency.

4 dwg, 1 tbl

FIELD: forging.

SUBSTANCE: invention refers to cold forging of rod-shaped works with heads of ball stud type. Hollow ball stud is made of sheet bar. At the first two stages semi-finished product of barrel type is produced. Its outer diameter is equal to the largest diameter of ball-shaped head. At the following stages allowance cutting-off along open face is made. Further the operation of primary reduction and rod-shaped part reduction is made. At this, cone is formed with dimensions corresponding to the parameters of finished detail and closed head of rod-shaped ball stud is produced. Then reduction of the end for thread and calibration of rod-shaped and core pars are executed.

EFFECT: working resource increase, increase of quality of hollow ball stud.

1 dwg, 7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming. Proposed method comprises cutting the billet, direct extrusion of rod, pre-forming the head and final head heading. In rod direct extrusion taper section is formed, its length not exceeding 1.2 diameter of its larger base equal to billet diameter. Then, end face section is reduced to sphere diameter equal to half the semi-sphere diameter on end face of finished billet. Simultaneously, taper is formed with length equal to final length of finished part and rod face is chamfered. Now, head made up of two different-diameter semi-spheres is formed.

EFFECT: higher strength of tool and quality of produced articles.

1 dwg

FIELD: metallurgy.

SUBSTANCE: matrix for upsetting contains insert and shroud ring. The insert is pressed in the shroud ring with variable tension through height of the shroud ring or insert. The mating external surface of the insert and internal surface of the shroud are made cone. The variable tension between these surfaces is created by their making with various differences between the ring internal diameter and outside diameter of the insert at opposite ends of the matrix. The variable tension Δ is selected based on expression: Δ = Δ1-Δ2 = (0.02…0.34) mm, where Δ1 is tension between the mating surfaces of the insert and shroud ring from side of the matrix mirror, Δ2 is tension between the mating surfaces of the insert and shroud ring from side of the matrix end face opposite to the matrix mirror.

EFFECT: increased cyclic resistance and strength of the matrix, increased its production effectiveness.

2 dwg

FIELD: metallurgy.

SUBSTANCE: several cycles consisting of a pipe end heating operation and an operation of its upsetting with a puncheon in a cavity of a split die on an upsetting press are subsequently performed. During the second operation, upsetting is performed using a die and a puncheon of the same sizes as at upsetting during the first operation. Besides, upsetting during the second operation is performed with a shrinkage value that is determined from the given ratio depending on the value of deviation of pipe wall thickness, nominal outer diameter of the pipe and nominal thickness of the pipe wall.

EFFECT: reduction of deviations of geometrical dimensions of internal upsetting zones.

FIELD: metallurgy.

SUBSTANCE: forging machine includes interchangeable moulds and a cantilever arm located on the axis with a possibility of being turned about it by means of a turning drive. On the cantilever arm there installed is a slide with a replaceable puncheon provided with an alignment bar. The slide has a possibility of being moved along the cantilever arm by means of a movement drive. Interchangeable moulds are provided with a mechanism for their clamping in the form of wedges with fasteners.

EFFECT: possibility of local deformation of pipes of a wide range of sizes, which have different curvature radius.

4 dwg

FIELD: metallurgy.

SUBSTANCE: heated end of a drill pipe is deformed on a press in a cavity of a split die by means of a movable puncheon in four subsequent upsetting operations. First, deformation of the pipe end is performed only with reduction of the inner diameter of the upset end. For the first upsetting operation, a puncheon and a split die is used, the diameter of the working cavity of which is equal to diameter of the upset pipe in a hot state. For the second operation, a split die which is specified in the first upsetting operation and a puncheon of a smaller diameter is used. For the third upsetting operation, a die of a larger diameter and a puncheon specified in the second upsetting operation is used. For the fourth upsetting operation, a split die specified in the third upsetting operation and a puncheon the diameter of which provides for obtainment of the specified inner diameter of the upset end of the drill pipe is used.

EFFECT: increasing capacity and reducing the time required for replacement of a tool.

1 tbl

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