Method of punching studs with flange
(57) Abstract:Usage: metal forming, namely stamping round steel rod with flange, for example, axes cars. Heat the area of deformation of the rod and make a preliminary continuous set of heated metal axial load on the rod blanks. Forging flange carried out by the closure of the punch and die. Heating on the length of the stretch deformation of the side end face of the rod, equal to 4 - 5 times the diameter of the rod, leading to a temperature of 1100 - 1200oWith the rest of the length with a gradual drop in temperature to 900 - 800oWith towards the cold section of the rod. 3 tab., 7 Il. The invention relates to the processing of metals by pressure and can be used for punching round steel rod with flange, for example, the axes of the car.There is a method of forming a steel rod with a flange, comprising heating the area of deformation of the rod and the stamping of the flange 4 of the transition in the split die tool on GCF 
The disadvantage of this method is mnogopotochnost stamping process.There is a method of punching studs with flange includes a heating section deformation degree is maritally continuous set of heated metal axial load on the rod in the space between the punch and supportive tool in their open position, forming the site is free of deformation, the length of which does not exceed the critical, and stamping the flange of the closure plug and the supporting tool 
In the specified method number of positions forming reduced to one. However, in this way it is possible stamping products with a limited length of the stretch deformation of the rod to the diameter of the rod.The aim of the invention is the expansion of technological capabilities at the expense of stamping products with increased length of the stretch deformation of the rod to the diameter of the rod.This is achieved by a method of punching rods with a flange, comprising heating the area of deformation of the rod, its fixation from displacement in the direction perpendicular to the rod axis, in supporting the tool prior continuous set of heated metal axial load on the rod in the space between the punch and supportive tool in their open position, forming the site is free of deformation, the length of which does not exceed the critical, and stamping the flange of the closure plug and the supporting tool, heating on the length of the stretch deformation of the side end face of the rod, equal to 4-5 times the diameter of the rod, leading to tempeau to the cold section of the rod, and a set of metal leads with additional fixing the deformable end from moving in a direction perpendicular to the axis of the rod, in the punch.In Fig. 1 shows the heating zone of the rod; Fig. 2 placement of the rod between the punch and the supporting tool before a set of metal; Fig. 3 the end of the set of metal; Fig. 4 stamping flange; Fig. 5 scheme for determining the optimal length l2homogeneous heated section; Fig. 6 scheme of determining the optimal temperature t1on uniformly heated section; Fig. 7 the scheme of determining the optimum reduction temperature t2at the site, with a gradual lowering of temperature.Steel rod 1 of diameter d is heated, for example, induction, with one end of the length of the stretch deformation of the l1. The length of the stretch deformation of the l2by the end of the rod, equal to 4-5 times the diameter of the rod heating lead to a temperature of 1100-1200aboutAnd the rest of the length with a gradual drop in temperature to 900-800aboutWith towards the cold section of the rod. Next hot rod 1 is placed in a supportive tool 2, and the heated end of the rod 1 is placed in the recess 3 of the punch 4, grasping the rod on its laterally is ansto between punch and supportive tool in their open position, forming the site is free of deformation, the length of which is l3does not exceed the critical value. In the result set on the rod 1 is formed thickening 5. Next is the stamping of the flange 6 of the closure plug 4 and the supporting tool 2.The specified character of the temperature distribution on the length of the stretch deformation of the rod is achieved, for example, the following methods of heating.Heat in the inductor with a variable gap between the heated core and the coils of the inductor (the increase of the gap towards the cold section of the rod on the site, with a gradual temperature drop).Heating inductor with different heating time for different sections of the rod (longer time of heating for areas with higher temperature, for example, due to the gradual introduction of the heated section of the rod in the inductor).Heating inductor with pauses that provide the desired temperature gradient due to suction heat cold section of the rod.The combination of these methods.Below are the results of experimental work to determine the optimal parameters of the method.The stem diameter of 30 mmThe diameter of the flange 127 mmAssigned the free deformation of l3the diameter of the rod d 2.8 (l385 mm).Stem material steel 40G.Type inductor solenoid.The high frequency power source power is 250 kW.The current frequency of 240 Hz.Method of obtaining promyvaemykh temperature of the heating time.Method of obtaining promyvaemykh temperature gradients gradual introduction of the heated section of the rod into the coil.Determination of the optimal length l2uniformly heated area. Testing was conducted at t11150oC, t2850oC.The results of testing are shown in table. 1.Determination of the optimal temperature t1on uniformly heated area has been carried out under the following constant parameters:
The results are shown in table. 2.Determining the optimum reduction temperature t2at the site, with a gradual temperature drop was provided with the following fixed parameters:
The results of testing are shown in table. 3.When the punching rods with a diameter of 30 mm, flange diameter of 127 mm in a manner consistent imago end in punch) could not obtain a sufficient thickness of the flange, as the ratio of the length of the stretch deformation of the rod to the diameter of the rod was not able to get more than 6. Increasing this ratio by the end of the set of metal formed folds at the expense of continuity of education thickening, and increased stress due to limited space for a set of metal (the length of the site is free of deformation l3not more than 2.5 (d), which increase due to the increase in l3led to buckling of the rod on the site is free of deformation;
By forging these steel rods offer a combination of uniformly heated area and area with a gradual drop in temperature, the presence of additional fixing the deformable end of the punch by placing the butt in the pocket, covering the rod on its side surface, the optimal parameters l24-5d, t11100-1200aboutC and t2900-800about(C) allowed to obtain a sufficient thickness of the flange and the required equal to 8, the ratio of the length of the stretch deformation, as well as the required quality forgings.Advantages of the method are that by the end of the set of metal when the tendency of the formation of secondary thickening coming into the area Svoboda its further distribution without the formation of secondary thickening. In combination with the gradual temperature drop in the area of deformation of the rod it provides with a set of metal together, without discontinuities, thickening and subsequent receipt of the flange without folds. To compensate for the increased efforts of a set of metal associated with the lowering of temperature of the metal to the end of the set, the process is conducted at elevated values of the length of the site is free of deformation (l3more than 2.5 d), which increases the space for a set of metal and makes it more filling, and reduces the length of the heated area in the matrix, which reduces the interfering set of metal friction force between the heated portion and the inner surface of the matrix. This allows a set of metal without deformation (fragment) cold section of the rod despite the reduction temperature of the metal to the end of the set. To prevent buckling of the rod in terms of the increased length of the site is free of deformation, which is especially important in the initial set, when the set of involved parts of the rod with a high temperature, is used for additional fixation of the deformable end of the punch by placing the butt in the pocket, covering the rod on its sides the formation of l32.5.3 d. METHOD of FORMING RODS WITH a FLANGE, comprising heating the area of deformation of the rod, its fixation from displacement in the direction perpendicular to the rod axis, in supporting the tool, advanced continuous set of heated metal axial load on the rod in the space between the punch and supportive tool in their open position, forming the site is free of deformation, the length of which does not exceed the critical, and stamping the flange of the closure plug and the supporting tool, characterized in that the heating on the length of the stretch deformation of the side end face of the rod, equal to 4-5 times the diameter of the rod, leading to a temperature of 1100 - 1200oAnd the rest of the length with a gradual lowering of temperature to 900 - 800oWith towards the cold section of the rod, and a set of metal leads with additional fixing the deformable end to move in a direction perpendicular to the axis of the rod, in the punch.
FIELD: metal working.
SUBSTANCE: hard alloy matrix has casing, bushing pressed in the case and hard alloy insertion. Bushing has multifaced hole. Hard alloy insertion is composed by several sections made in form of trapezoidal-section prisms which have cut angles at their non-working edges. Number of sections corresponds to number of faces of item to be headed. Cuts of angles are made symmetrically to faces of working edge. Slits are made in several places of multifaced hole bushing at the ponts where faces cross each other.
EFFECT: improved resistance of matrix; simplified assembly.
3 cl, 1 dwg
FIELD: plastic metal working, possibly manufacture of rod parts with heads.
SUBSTANCE: method comprises steps of placing portion of heated measure blank in movable die spring-loaded in axial direction and forming thickened portion. Die is mounted with possibility of motion in direction coinciding with that of punch motion. Additional step is realized for forming rod due to placing portion of blank in one-piece die with technological gap. Before forming thickened portion and rod, free heading of the whole blank is performed. Then die is moved and simultaneously first stage of heading thickened portion and step of rod forming by closed heading are realized. Closed heading is performed due to moving portion of blank in direction inverse relative to motion direction of punch and die. Then thickened portion is headed in fixed position of die.
EFFECT: possibility for making rod parts with thickened portion by means of simple technological tooling in high-speed automatic presses.
3 cl, 6 dwg, 2 ex
FIELD: plastic working of metals, possibly manufacture of Г-shaped parts from sheet blanks.
SUBSTANCE: method comprises steps of placing two sheet blanks in die and deforming them by means of vertically descending punch for forming two Г-shaped parts with flange arranged normally relative to rear flat face of parts. Blanks are subjected to upsetting while they rest one upon other by their flat faces.
EFFECT: enhanced efficiency of process, simplified design of fitting.
FIELD: construction equipment.
SUBSTANCE: rod ends are made with thickenings which have screw. For rods joining joiner is used with inner screw. Thickenings on rod ends are received on forging press fitted with equipment for cold heading of reinforcing rod ends. As stated device for disembarkation forging die is used, having longitudinal channel along the length for operation security with long reinforced rods.
EFFECT: provision of process capability widening of used equipment with serviceability and economic feasibility preservation.
20 cl, 12 dwg
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.
SUBSTANCE: end section of billet is heated and deformed in die block. At that at first metal is accumulated for molding of rod head. Accumulation is done in at least three stages in puncheon cavity. Volume of this cavity is selected provided that its value is reduced from the first stage of deformation to the last one in interval that makes 1.2÷1.1 from volume of finished rod head. Then nipple part of head is molded in puncheon cavity with provision of its profile and geometric dimensions. Remaining part of rod head external surface is molded in matrix cavity.
EFFECT: higher quality of produced items with simultaneous simplification of production and reduction of expenses.
FIELD: technological processes.
SUBSTANCE: device comprises fixed plate for installation on press table, cylinder with semi-matrices and upper movable plate with shape puncheons. Upper plate is connected to press slider by means of tailpiece. Gasket with inclined surface and guides is rigidly fixed to stationary plate. Cylinder equipped with mechanism of its sliding moves in guides. Device is provided with hold-down connected to upper movable plate and polyurethane component. Semi-matrices have cavity, where pusher is installed. Working opening of semi-matrices is provided along extruded bar within the limits of the upper allowance for its manufacture. Upper hold-down and semi-matrices have cone to arrange stock hold-down together polyurethane component, whenever upper plate moves down.
EFFECT: higher efficiency.
FIELD: technological processes, metal working.
SUBSTANCE: invention is related to metal plastic working and may be used to manufacture products from lengthy billets with relative length of extruded part that exceeds the length permissible under condition of longitudinal stability. Area of extruded part of billet adjacent to clamping part of split matrix is heated up to maximum forging temperature. This area has relative length, which does not exceed length permissible as per condition of longitudinal stability. Moreover, heating is provided for end section of extruded part by means of heat transfer until minimum forging temperature is obtained on its end surface. Billet is installed in clamping part of split matrix with installation of deforming puncheon and end section of billet extruded part in movable guide bush. Bush is aligned with split matrix. Then edging is carried out by free upset, and product is shaped in single stage.
EFFECT: improved quality of manufactured products and efficiency of their manufacturing process.
4 dwg, 1 ex
SUBSTANCE: invention refers to metal processing by pressure and can be applied in production of multifacet items, such as nuts. Die includes cartridge, intermediate bushing, bushing with multifacet hole, and soli alloy insert. Insert includes separate sections in the numbers equal to number of upset item facets. Sections are made in the form of prisms with trapezoid cross-section with beveled corners at non-operational ends. Insert section corner bevels are symmetrical to operational end facets. Bushing with multifacet hole features cuts at facet junctions. Intermediate bushing is housed tightly in the case and clamps cut bushing with multifacet hole. Insert section thickness b is selected out of 1/3S ≤ b ≤ 2/3 S range, where S is turnkey size of the upset item.
EFFECT: enhanced bushing durability, solid alloy saving.
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and can be used for producing oilwell tubing. Pipe-end upsetting is carried out by forming outer surface of upset part and zone arranged behind upset part, as well as inner surface of upset pipe-end. Forming of upset part outer surface and zone arranged there behind, is performed using upsetting die. Said die has cylindrical and taper sections to form upset part and taper section to form zone behind upset part. Upset pipe-end inner surface is formed by upsetting punch with section for aforesaid forming. OD of said section exceeds by 0.6-1.5 mm the rated ID of oilwell tubing smooth part. Note here that upsetting die and punch are used with due allowance for thermal expansion factor of upset metal making 1.0065 -1.0085.
EFFECT: upset pip-ends that do not require additional machining.