A method of manufacturing intermediate pieces for a collector motor

 

(57) Abstract:

The invention relates to the processing of metals by pressure, and is intended for collectors manufacturing electric cars. Cylindrical billet gauge, after which it form the glass support extensions of blades on the inner side surface by longitudinal extrusion of the matrix plug with longitudinal grooves on the working end having a cross-sectional cross-sectional shape of the support protrusions of the slats. On the open part of the Cup form intended for further education petals slats annular crown by longitudinal extrusion of the matrix a punch with a smooth lateral surface. Then remove the bottom of the glass and obtochuyut ends. The support protrusions of the slats form a length equal to the length of the slats collector allowance for mechanical trimming after you remove the bottom of the glass. A circular crown shape with the height of the wall equal to the length of the petals slats with allowance for end trimming. After calibration produce annealing of the cylindrical workpiece. A circular crown shape prior to forming the glass supporting ledges slats in closed at one end matrix punch, smooth side pavkovi surface form in a single pass another punch in the matrix, made closed at one end. The result is the production of intermediate pieces and increase its reliability. 4 Il.

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

A known method of manufacturing intermediate pieces for a collector motor, provided with grooves along the entire length of the material of the EU and 57 (see report of Charles Stade "Progressive technology of metal forming and cold forming using the crank-knee presses", presented at the international exhibition "Machines-91").

In the known method, the collector component is manufactured from pre-processed workpiece from the rod for three transitions: 1 transitions sediment procurement - calibration;

2nd transition - deep drawing of cups with a smooth inner surface of the side wall and punching the bottom;

3-transition - extrusion and calibration.

The shaping of the blades on the inner surface of the workpiece and forming a flange from which in the future should be formed petals slats. Education of blades on the inner surface of the hollow billet exercise prodelin the s.

The main disadvantage of this method is high load on the end part of the plug, resulting in reduced tool life.

There is also known a method of manufacturing intermediate pieces for a collector motor (RU 2090296 C1, 20.09.1997, 21 B To 21/00), adopted as the closest analogue. It includes obtaining bar cylindrical billet, its calibration, the calibrated extrusion of the billet of glass formation pornwj protrusions slats running on its internal side surface of the punch, at the working end of which is made of longitudinal grooves having cross-sectional cross-sectional shape formed by the abutment of the projections of the blades, and with the formation of a smooth circular cylindrical crown, located on the outside part of the glass and intended for further education petals blades, and remove the bottom of the glass and turning the ends, with a smooth circular cylindrical crown shape of a cylindrical ring belt, performed on the side surface of the above-mentioned punch directly over the longitudinal grooves. The glass form the first longitudinal extrusion when implementing a punch in okalebo the end of the matrix, and then, without removing the glass of punch, punch stretch through the matrix extraction calibrating a round hole to the formation of the cavity with a depth equal to the length of the collector lamellas and their petals.

Thanks outlined the scheme of formation of the intermediate workpiece is reduced, the load on the end part of the plug. However, it should be noted that the formation of a smooth circular cylindrical crown on the open part of the Cup is carried out in the process of pulling the workpiece through the matrix extraction calibrating a round hole to education in the workpiece cavity with a depth equal to the length of the collector lamellas and their petals, i.e., the open part of the Cup, which has the form of a smooth circular cylindrical crown, is formed at the end of the transport process of the metal parts, which has undergone significant deformation, acquired great work hardening, high hardness and low ductility. Further education petals slats of the ring crown, consisting of a metal with a high degree of work hardening, high hardness and low ductility, is difficult.

The main disadvantage of this method according to the patent of Russian Federation N 2090296 is high rigidity and low which leads to the complication of the manufacturing techniques collector motor for example, will require additional annealing operation intermediate pieces. In addition, the mass of metal constituting the specified crown, may be heterogeneous, which could adversely affect the strength of the petals of the slats during operation of the motor.

Before the invention of the task to reduce the probability of occurrence of work hardening the metal ring of the crown in its formation and to maintain the plasticity of the metal close to the original plasticity tailored blanks.

The invention consists in that in the method of manufacturing the intermediate piece for collector motor, including the production of a cylindrical billet, its calibration, the forming of tailored blanks of glass supporting ledges of blades on its inner side surface by longitudinal extrusion of the matrix plug with longitudinal grooves on the working end having a cross-sectional cross-sectional shape of the support tabs of the blades, forming on the outside part of the glass intended for further education petals slats ring crown by longitudinal extrusion of the matrix a punch with gadchiroli length, equal to the length of the slats collector allowance for end trimming after you remove the bottom of the glass ring and the crown height of the wall equal to the length of the petals slats with allowance for end trimming, according to the invention after calibration produce annealing of the cylindrical workpiece, forming the circular crown is carried out before the formation of the glass with the support tabs of the slats in a closed from one end of the matrix punch, smooth side surface which is at its working end, and forming a Cup with the supporting ledges of blades on its inner side surface are in one pass another punch in the matrix made closed at one end.

Due to the fact that forming a smooth round circular crown, located on the open part of the Cup, carry out the first stage of the manufacture of intermediate pieces for a collector motor, i.e., immediately after initial calibration and annealing of the original piece, and forming the rest of the glass ring crown deformation is not exposed, achieved technical result consists in the fact that the metal constituting the annular crown retains its plastycznosci result allows to simplify further technology education petals slats of an annular crown and to increase their reliability in the operation of the motor.

In Fig.1 shows a longitudinal extrusion of the open part of the Cup in the form of a smooth circular crown, an axial slit.

In Fig. 2 presents a schematic longitudinal extrusion of glass formation on the inner surfaces of the support protrusions of the blades, an axial slit.

In Fig.3 shows a cross section a-a of Fig.2 in an enlarged scale.

In Fig.4 shows an intermediate billet ready.

A method of manufacturing intermediate pieces for a collector motor includes a series of sequential operations.

From rod separates the cylindrical workpiece 1, which is calibrated transverse extrusion. Calibrated workpiece 1 is placed in the matrix 2 (Fig. 1), closed at one end by protivopoloznom 3, and longitudinal extrusion of the plug 4, the side surface 5 of the working end of which is made of a smooth, form an open part of the Cup 6 in the form of a smooth circular crown 7 with a height equal to the length of the petals slats ready collector allowance for mechanical cutting.

The following operation is performed by the punch 8 (Fig.2 and 3), at the working end of which, starting from an end face, formed the core section 9, on the surface Tupou 11 slats ready collector and separated by ribs 12. Punch 8 in one pass longitudinal extrusion of the matrix 2, closed at one end by protivopoloznom 3, forms the remaining portion 13 of the Cup 6 with the formation on the inner surface of the supporting protrusions 11 blades with a length equal to the length of the slats collector allowance for mechanical pruning after removal of the bottom 14 of the glass. The diameter of the smooth surface 5 of the plug 4 (Fig.1) perform equal to 1.0 - 1.1 diameter of the profile section 9 of the plug 8 (Fig.2) on the projections of the ribs 12. The diameter of the cylindrical holes of the matrix 2 is carried out is equal to the diameter of the produced collector allowance for finish turning.

In the process of forming a profile part 13 of the Cup 6 longitudinal extrusion previously obtained a smooth circular crown 7 additional deformation is not exposed and retains its original shape and position to the open part formed of glass 6.

After forming a profile part 13 of the Cup 6 remove the bottom 14 and cut the ends. Thus obtained intermediate of the workpiece 15 (Fig.4) in the form of a sleeve on the inner surfaces of which are supporting protrusions 11 of blades, and at one end is a smooth circular crown 7, PR is of a smooth annular crown carry out the first stage of the manufacture of intermediate pieces for a collector motor and its subsequent shaping of the annular crown deformation is not exposed, achieved technical result, namely the metal constituting the annular crown retains its plasticity, close to the original plasticity calibrated and annealed billet. This allows to simplify further education petals slats of an annular crown and to increase their reliability in the operation of the motor.

A method of manufacturing intermediate pieces for a collector motor, including the production of a cylindrical billet, its calibration, the forming of tailored blanks of glass supporting ledges of blades on its inner side surface by longitudinal extrusion of the matrix plug with longitudinal grooves on the working end having a cross-sectional cross-sectional shape of the support tabs of the blades, forming on the outside part of the glass intended for further education petals slats ring crown by longitudinal extrusion of the matrix a punch with a smooth lateral surface, and removing the bottom of the glass and turning the ends, with the support tabs of the slats form a long, equal to the length of the slats collector allowance for end trimming after you remove the bottom of the glass and the annular crown Le calibration produce annealing of the cylindrical workpiece, the formation of the ring crown is carried out before the formation of the glass with the support tabs of the slats in a closed from one end of the matrix punch, smooth side surface which is at its working end, and forming a Cup with the supporting ledges of blades on its inner side surface are in one pass another punch in the matrix made closed at one end.

 

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