Method of fin-free forming of parts

FIELD: plastic working of metals, possibly forming parts such as housings of equipment of gas turbine engines.

SUBSTANCE: part having inner cavity, slopes and branches with lugs is formed by fin-free process at least for two transitions. Inner cavity of part is formed at last transition; lateral branches are formed before last transition. Lugs and slopes are formed at last transition simultaneously with formation of inner cavity. Branch with lug in bottom of housing may be formed simultaneously with inner cavity by pressing out.

EFFECT: improved quality of parts, lowered efficiency of process.

4 cl, 1 dwg, 1 ex

 

The invention relates to the processing of metals by pressure, in particular to bezoblachnoy stamping valve bodies of gas turbine engines (GTE).

The known method bezoblachnoy stamping parts with an internal cavity, ledges and spikes with the tides, at least two transitions, in which the internal cavity is formed in the last transition. ("Die forging production", 2002, No. 11, pp.37-40) prototype.

The known method does not allow for high quality stamping parts of complex shape (so-called-low-tech parts") without the presence of internal and external defects and with the full form of the matrix stamp, and it is these details include, for example, a valve body GTE.

The technical result, which is aimed by the invention is the obtaining of die forgings, such as valve bodies of the CCD, with the maximum approximation to the geometry of the finished part while ensuring high quality stamping and reducing the utilization of metal.

This technical result is achieved in that in the method bezoblachnoy stamping parts with an internal cavity, ledges and spikes with the tides, at least two transitions, the internal cavity formed in the last transition, and the side shoots fo mirouet until the last transition, and the tides and the ledges in the last transition simultaneously with the formation of an internal cavity.

The method can be used in the manufacture of valve bodies for gas turbine engines.

The way the process with the tide at the bottom of the casing may form simultaneously with the internal cavity of the extrusion.

The use of extrusion for the formation of bone in the bottom part appropriate with a large (H/D>2,5) the ratio of the height to the diameter of the original piece, as in this case, possible loss of longitudinal stability of the workpiece and the emergence of the clamps. In the bottom part may be provided for execution as a single process with the tide or without him, and several appendices. In the way that parts can be formed from titanium alloys.

The formation of ledges and tidal processes in the last transition simultaneously with the extrusion of the internal cavity of the details due to the fact that their formation at the initial transitions punching leads to defects such as clamps, utain etc.

To address these shortcomings in the first transition punched workpiece maximum technological, namely with smooth processes without tides and ledges, and only in the last transition, during extrusion of the inner cavity of the housing issue final geometry processes, such as tides and shoulder details. Taka is the sequence of operations is due to the fact, what other techniques and a different sequence of operations inevitably getting defects in the finished parts.

If the item, for example, building on the constructive conditions must have a lower process (or more lower appendages), it is formed simultaneously with the formation of an internal cavity, i.e. when the last transition. This is due to the loss of longitudinal stability of the workpiece with a large ratio of diameter to height and, as a consequence, obtaining the clips in the finished part.

Consider the example of a particular implementation of the method bezoblachnoy stamping building, block valves gas turbine engine of titanium alloy AT-1, having a three process 1, 2, 3 with the tides, the ledges 7, 8, 9, 10 and the inner cavity 11 (drawing).

The stamping was performed for the two transitions from the original billet with a diameter of 36.5 mm and a length of 135 mm in isothermal conditions on the hydraulic press. The billet was heated to a temperature of 950°and by stamping, for example by extrusion, got procured in advance with smooth processes 1, 2 and flanges, without an inner cavity. Under the second transition is again heated billet to 950°and perform the final stamping of the body with the formation of tides 5, 6 laterals 1, 2 lower ridge 3 ebb 4, ledges 7, 8, 9, 10 and the internal cavity 11 of the housing.

The inventive method compared the Oia with the prototype allows to increase the utilization rate of the metal by 30% and significantly reduce the complexity of machining by increasing the accuracy of the geometry of the part after forming.

1. The way bezoblachnoy stamping parts with an internal cavity, ledges and spikes with the tides at least two transitions, in which the internal cavity is formed in the last transition, characterized in that the side shoots form until the last transition, and the ebb and form ledges in the last transition simultaneously with the formation of an internal cavity.

2. The method according to claim 1, characterized in that the stamp of the valve housing of the gas turbine engine.

3. The method according to claim 1, characterized in that the ridge in the bottom of the casing is formed by extrusion simultaneously with the formation of an internal cavity.

4. The method according to claim 1, characterized in that the punched parts from titanium alloys.



 

Same patents:

FIELD: machine engineering, possibly fitting manufacture, namely forming body parts of pipeline fittings.

SUBSTANCE: method comprises steps of forming bottom and branch pipe of body part from hot cylindrical tubular blank. Blank is placed in die set on squeezing punch and it is squeezed by means of lower die and then branch pipe is pressed out branch pipe with use of shaping punch in the same die set without replacement of blank. Formed bottom has constant thickness and branch pipe has variable thickness of wall.

EFFECT: improved operational reliability and strength of parts, lowered metal consumption and simplified process for making them.

2 dwg

The invention relates to the processing of metals by pressure and can be used for the manufacture of parts with a tapered cavity backward extrusion

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 field of metal forming and can be used, for example, in the manufacture of barrels of weapons and gunpowder Assembly tools

The invention relates to the processing of metals by pressure, and is intended for collectors manufacturing of electrical machines

The invention relates to the processing of metals by pressure and can be used in various engineering industries in the case of molding of semi-finished products having the form of a pipe, details of various finite forms or details intended for additional processing, such as cutting

The invention relates to the processing of metals by pressure and can be used for the manufacture of axisymmetric products with a stepped outer surface and a hole along the centerline

The invention relates to welding, in particular to a method of manufacturing electrodes for resistance spot welding, and may find application in the manufacture of electrodes of a complex profile

The invention relates to a pressure treatment and can be used for hot stamping long hollow products with a flange and a shank, for example, Zapf trucks

FIELD: plastic working of metals, possibly forming parts such as housings of equipment of gas turbine engines.

SUBSTANCE: part having inner cavity, slopes and branches with lugs is formed by fin-free process at least for two transitions. Inner cavity of part is formed at last transition; lateral branches are formed before last transition. Lugs and slopes are formed at last transition simultaneously with formation of inner cavity. Branch with lug in bottom of housing may be formed simultaneously with inner cavity by pressing out.

EFFECT: improved quality of parts, lowered efficiency of process.

4 cl, 1 dwg, 1 ex

FIELD: metallurgy.

SUBSTANCE: it is heated punched section of initial blank and implemented head punching per several passages. During punching initial blank is clutched in half-matrixes. At the first passage it is punched head in the form of two cones, joined by major foundations. At the second passage received semi-finished product at first clutched by half-matrix in places of cones coupling. Then head is punched in the form of cylinder with axis, perpendicular to longitudinal axis of initial blank. Cylinder height is defined equal to 0.8÷0.9 of major foundation diameter of cones. At the last passage it is finally punched head in the form of bowl.

EFFECT: reduction of making cycle time with simultaneous improvement of received blank.

4 dwg, 1 ex

FIELD: machine engineering, possibly fitting manufacture, namely forming body parts of pipeline fittings.

SUBSTANCE: method comprises steps of forming bottom and branch pipe of body part from hot cylindrical tubular blank. Blank is placed in die set on squeezing punch and it is squeezed by means of lower die and then branch pipe is pressed out branch pipe with use of shaping punch in the same die set without replacement of blank. Formed bottom has constant thickness and branch pipe has variable thickness of wall.

EFFECT: improved operational reliability and strength of parts, lowered metal consumption and simplified process for making them.

2 dwg

FIELD: plastic working of metals, possibly forming parts such as housings of equipment of gas turbine engines.

SUBSTANCE: part having inner cavity, slopes and branches with lugs is formed by fin-free process at least for two transitions. Inner cavity of part is formed at last transition; lateral branches are formed before last transition. Lugs and slopes are formed at last transition simultaneously with formation of inner cavity. Branch with lug in bottom of housing may be formed simultaneously with inner cavity by pressing out.

EFFECT: improved quality of parts, lowered efficiency of process.

4 cl, 1 dwg, 1 ex

FIELD: plastic working of metals, possibly manufacture of sleeve type parts.

SUBSTANCE: method comprises steps of forming semi-finished product at deforming initial blank and calibrating it along outer lateral surface; pressing out cone cavity in semi-finished product by means of punch while providing displacement of excess metal occurred due to volume error of initial blank to end of semi-finished product; during one technological transition performing intermediate deforming of semi-finished product and finally forming part. In order to realize it, semi-finished product is placed in die of die set in such a way that its cone cavity is turned downwards and lower end of semi-finished product is placed with gap relative to bottom of die. With use of deforming punch cavity is pierced in semi-finished product in direction opposite to narrowing direction of cone cavity. Gap between lower end of semi-finished product and bottom of die is filled with material of semi-finished product and cone cavity is opened for forming metal scrap in front of deforming punch. Simultaneously metal scrap is removed and part cavity is calibrated.

EFFECT: lowered energy consumption of process.

10 cl, 11 dwg, 1 ex

FIELD: technological processes.

SUBSTANCE: for parts production cold-upsetting tool is used in the form of multi-position unit. Unit includes five positions and contains puncheons, thrusters, assembled matrixes and strippers. Assembled matrix in the fourth position is installed motionlessly and is equipped with reduction step at the insert. Stripper of the fourth position is arranged with the opening, in which spring-loaded puncheon is installed. Cut billet is subjected to setting and calibration with leveling of butt ends and formation of conical marks. By means of further billet setting head is created. Then opening is pressed out in the billet and its external diameter is reduced with formation of step. Reduction of diameter is carried out in motionless matrix with insert, which has reduction step. For that purpose billet is displaced until it thrusts stripper with spring-loaded puncheon with its butt-end. Puncheon is installed in billet pressed out opening. Later billet is displaced together with puncheon and stripper via reduction step of matrix. After that billet opening is interweaved.

EFFECT: expansion of technological resources.

2 cl, 4 dwg

FIELD: technological processes, metal processing.

SUBSTANCE: invention concerns metal processing by pressure and can be applied in manufacturing of parts with stepped hollow space consisting of lesser diametre space with transition ledge and flat bottom area. Hollow spaces are formed in several steps by puncheons of different diametre in original blank cut off of a rod. At the first step a hollow of larger diametre is formed by reverse expression with calibration by reduction. Next hollow is formed by reverse expression. A hollow located above the hollow of lesser diametre is formed by reverse expression and shaping of transition ledge of required shape and size. Further a hollow of smaller diametre is formed by reverse expression, its bottom shaped as a flat area. Transition ledge height over the bottom is maintained due to a metal volume lifted from the bottom by expression.

EFFECT: expanded technological capacities of the method, improved quality of finished articles, enhanced durability of technological equipment used.

2 cl, 4 dwg

FIELD: technological processes.

SUBSTANCE: invention is intended for production of hollow high precision pipe forged pieces with alternating profiles of external surface by cold radial compression. Method for production of hollow products with alternating profile of external surface includes production of initial billet, its mechanical processing with production of hollow billet, fixation of hollow billet between support and driving devices of radial clamping machine, deformation of hollow billet by means of radial clamping in holder installed in opening of hollow billet during length feed of the latter and final mechanical processing of deformed forged piece. Radial compression is done along the whole length in two operations, the first of which is carried out to produce semi-finished product with unstrained section. After the first operation of radial compression produced semi-finished product is turned by 180, installed with unstrained section in direction of support device, and the second operation of radial compression is carried out.

EFFECT: high precision of products.

2 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming. Proposed method comprises making tubular billet, barrel forged piece radial reduction to obtain curved generating line of outer surface. Reduction at radial reducing machine is carried out with the help of master cam and servo drive with sensing roller that may roll on over said master cam. Barrel forged piece outer surface has curved generating line made up of two section. One section on muzzle section is located at internal angle while at another it is located on breech housing side. Said sections are conjugated by conjugation radius proceeding from definite relationship. Final machining includes cutting.

EFFECT: higher precision.

1 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used for production of gas turbine engine discs. Blank is pierced and rolled at mandrel. To define blank diameter and height before piercing, hollow forging step weight is determined with machining allowances. Then, sizes of stepped blank are calculated for rolling at mandrel with due allowance for weight of every stage. Then, maximum, bottom and top diameters are determined as well as pierced blank height. Said pierced stepped blank is transformed for rolling to preset sizes by smoothing blank outlines. Blank diameter and height is determined for piercing by relationships given herein.

EFFECT: decreased metal input.

3 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used for production of cup with flange parts. Initial blank is formed in two steps. At first step, initial blank is subjected to re-extrusion to make cup inner space. Note here that male die is used composed of main and end parts. After first step, composite male die end part is left at cup bottom. At second step, said blank is upset to make the flange at blank top Along with upsetting, blank is expanded by stepped male die acting on blank side surface. Said steeped male die has taper part with cone generatrix inclination angle of 10-15 degrees. After forming at second step, composite male die end part is removed from the part.

EFFECT: parts with enlarged flange.

2 dwg, 1 tbl

Up!