CA1267357A - Press tool for face collector - Google Patents
Press tool for face collectorInfo
- Publication number
- CA1267357A CA1267357A CA000525754A CA525754A CA1267357A CA 1267357 A CA1267357 A CA 1267357A CA 000525754 A CA000525754 A CA 000525754A CA 525754 A CA525754 A CA 525754A CA 1267357 A CA1267357 A CA 1267357A
- Authority
- CA
- Canada
- Prior art keywords
- grooves
- die
- guiding
- punch holder
- punches
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Punching Or Piercing (AREA)
Abstract
PRESS TOOL FOR FACE COLLECTOR
(Abstract) A press tool comprising a bottom plate onto which there are mounted a die with radial grooves and a profiled ejector inserted into the die and circularly oriented in it so, that the grooves of the die and the ejector coincide, and over them, by means of guiding columns and guiding sleeves, there are mounted a top plate with a rigid insert attached to its bottom side, a rest and a punch-holder with radial grooves, in which there are fastened prismatic punches and a central core, and underneath the punch-holder there is provided a punch-guide, fastened to the guiding columns by means of guiding sleeves.
(Abstract) A press tool comprising a bottom plate onto which there are mounted a die with radial grooves and a profiled ejector inserted into the die and circularly oriented in it so, that the grooves of the die and the ejector coincide, and over them, by means of guiding columns and guiding sleeves, there are mounted a top plate with a rigid insert attached to its bottom side, a rest and a punch-holder with radial grooves, in which there are fastened prismatic punches and a central core, and underneath the punch-holder there is provided a punch-guide, fastened to the guiding columns by means of guiding sleeves.
Description
7~35~i~
The present invention relates to a press tool for face collector, particularly to a press tool for separating the segments (lamellae) of a blank for the face collector of an electric machine.
A known device for stamping radial grooves in the blank for a face collector for electric machines comprises a base plate, onto which there is mounted a die with ejector with radial grooves, and by means of guiding columns there is arranged over the die the top part of the press tool consisting of a set of wedge punches, which is centered with respect to the axis of the die and is circularly oriented with respect to the radial grooves of the ejector, so that to each punch corresponds one groove. See, Marziniak K., "Cold Forming of Wedge-Shaped Workpieces". Proc. 1st Int.
Conf. Rotary Metalwork. Proces., London, 1979, Kompstene 1979, 137-146.
The drawbacks of this known device are the impossibility of obtaining parallel walls of the radial grooves of the collector blank and a preset distance between the segments, the necessity of a great pressing force, and a reduced repair suitability of the finished face collector because of the enlargement of the distance between the segments at repeated machining by turning.
It is, therefore, a general object of the invention to develop a press tool for the blank of a face collector for electric machines, which makes it possible to press in the blank for the face collector radial grooves with parallel walls and preset distance between the segments, which requires less pressing force and which results in increased accuracy of the sizes of the processed blank.
According to the present invention there is provided a press tool for a face collector, particularly for separa-ting segments of a blank for the face collector of an ~d6~3 S7 electric machine, comprising:
- a bottom plate onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
~ a top plate movably mounted on said guiding columns,said top plate being provided with a rigid insert in its bottom part;
- said rigid insert being provided with a rest and a punch holder;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said central core being provided with a plurality of longitudinal stiffining grooves;
- a pounch guide, disposed below the punch holder and movably mounted on said guiding columns;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves and in said longitudinal grooves;
- said die being provided with a plurality of radial grooves facing said punches.
~ ccording to the present invention, there is also provided a press tool for a face collector, particularly for separating segments of a blank for the face collector of an electric machine, comprising:
- a bottom place onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
- a top plate movably mounted on said guiding columns, said top plate being provided with a rigid insert in its bottom part;
A
~.~6735~7 - said rigid insert being provided wi-th a rest and a punch holder;
- said punch holder being provided with a circular groove;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said prismatic punches being provided with guides;
- said central core being provided with a plurality of longitudinal stiffining grooves and a limiting sleeve in its bottom portion;
- a punch guide, disposed below the punch holder and movably mounted on said guiding columns, said punch guide being provided with a plurality of guiding grooves and a circular tooth;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves, in said longitudinal grooves and in said guiding grooves;
- said die being provided with a plurality of radial grooves facing said punches, said radial grooves being open at their bottoms and closed along their external cylindrical portions by a banding ring;
- said profiled ejector being centrally located beneath said die and forming with said die a stamping cavity, said punch holder being disposed above said cavity.
Preferably, the profiled ejector is provided in its top face portion with ejector grooves, in which there are formed connecting bridges of the blank for the face collector.
The advantages of the invention lie in the ability to stamp with the press tool, in a blank face collec-tor, radial grooves with parallel walls and a preset distance between the segments, using a reduced pressing force and A
12~;~3s7 resulting in an increased size accuracy of the produced blank and improved repair suitability of the finished collector.
With these and other objects in view, which will become apparent in the following detailed description, the present invention, which is shown by example only, will be clearly understood in connection with the accompanying drawing, in which:
Fig. 1 is a vertical cross-sectional view of the press tool for face collector, the left side showing the working position, and the right side showing the starting position;
Fig. 2 is a partial cross-sectional view through the prismatic punches and a column of the punch-holder;
Fig. 3 is a partial cross-sectional view along line A-A of Fig. 1 of one quarter of the tool;
Fig. 4 is a diametrical sectional view of a blank for a face collector; and Fig. 5 is a top view of a blank for a face collector.
The press tool for face collector comprises a die 1 with a profiled ejector 3, centrally disposed and circularly oriented in the die. The ejector 3 is provided with ejector grooves 5. The die and the~ejector are mounted onto a bottom plate 2, in the centre of which an ejector pin 25 is fastened by means of a limiter 26.
The die 1 is provided with radial grooves 4, which are closed along its periphery by means of a banding ring 6.
Guiding 20 columns are mounted on bottom plate 2 and a top plate 19 is movably mounted on the guiding columns 20 preferably by limiting sleeves 18.
The blank 7 for the face collector ~not shown) is inserted in the die 1. Over the blank 7, there is disposed a circularly oriented punch holder 8 which is attached to a 1~67~3~7 rigid insert 10 of the top plate 19. The punch holder 8 is pxovided with guide grooves lS and a circular groove 21. In the punch holder 8, there are mounted a rest 9 and a central core 11. In the central core 11, there are machined stiffening grooves 12, and in the bottom portion of the central core 11, there may be disposed a limiting sleeve 13.
A punch guide 16 is movably mounted on said columns 28 preferably by guiding sleeves 17 and is disposed between said die 1 and said punch holder 8. The punch guide 16 is provided with guiding grooves 14 and a circular tooth 22 which may be telescopically shaped.
Prismatic punches 23 are positioned in the fixing grooves 15 of the punch holder 8 and in the stiffening grooves 12 of the central core 11 and in the guiding ~rooves 1514 of the punch guide 16. The punches 23 are provided with guides 24 which will enter into the radial grooves 4 of the die 1 when the press is activated. The punches 23 are circularily oriented and are in position opposite to the radial grooves of the profiled ejector.
20The circular tooth 22 of the punch guide 16 similarly enters into the circular groove 21 of the punch holder 8 when the press is activated.
Also when the press is activated the connecting bridges 28 of the blank for the face connector 7 enter into the ejector grooves 5 of the profiled ejector 3.
Opposite to the connecting bridges 28, there are formed the intersegmental. grooves 27, while between the intersegmental grooves 27 there are formed the collector segments 29.
30The operation of the press tool for face collector, according to the present invention, is as follows:
When the top late 19 moves towards the bottom plate 2, the guides 24 of the punches 23 enter the radial ~L2~i'7~5'7 grooves 4 of the die 1. Then, the prismatic punches 23 penetrate into the blank for face collector 7 until the punch-guide 16 is limited by the die 1, thus forming the intersegmental grooves 27 and the connecting bridges 28 between the collector segmen-ts 29 on the blank 7. In the beginning of the stamping, the circular tooth 22 of the punch-guide 16 increases the longitudinal stability of the prismatic punches 23. During the back stroke, the ejector pin 25 and the profiled ejector 3 ejects the blank for the face collector 7 out of the die 1.
A
The present invention relates to a press tool for face collector, particularly to a press tool for separating the segments (lamellae) of a blank for the face collector of an electric machine.
A known device for stamping radial grooves in the blank for a face collector for electric machines comprises a base plate, onto which there is mounted a die with ejector with radial grooves, and by means of guiding columns there is arranged over the die the top part of the press tool consisting of a set of wedge punches, which is centered with respect to the axis of the die and is circularly oriented with respect to the radial grooves of the ejector, so that to each punch corresponds one groove. See, Marziniak K., "Cold Forming of Wedge-Shaped Workpieces". Proc. 1st Int.
Conf. Rotary Metalwork. Proces., London, 1979, Kompstene 1979, 137-146.
The drawbacks of this known device are the impossibility of obtaining parallel walls of the radial grooves of the collector blank and a preset distance between the segments, the necessity of a great pressing force, and a reduced repair suitability of the finished face collector because of the enlargement of the distance between the segments at repeated machining by turning.
It is, therefore, a general object of the invention to develop a press tool for the blank of a face collector for electric machines, which makes it possible to press in the blank for the face collector radial grooves with parallel walls and preset distance between the segments, which requires less pressing force and which results in increased accuracy of the sizes of the processed blank.
According to the present invention there is provided a press tool for a face collector, particularly for separa-ting segments of a blank for the face collector of an ~d6~3 S7 electric machine, comprising:
- a bottom plate onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
~ a top plate movably mounted on said guiding columns,said top plate being provided with a rigid insert in its bottom part;
- said rigid insert being provided with a rest and a punch holder;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said central core being provided with a plurality of longitudinal stiffining grooves;
- a pounch guide, disposed below the punch holder and movably mounted on said guiding columns;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves and in said longitudinal grooves;
- said die being provided with a plurality of radial grooves facing said punches.
~ ccording to the present invention, there is also provided a press tool for a face collector, particularly for separating segments of a blank for the face collector of an electric machine, comprising:
- a bottom place onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
- a top plate movably mounted on said guiding columns, said top plate being provided with a rigid insert in its bottom part;
A
~.~6735~7 - said rigid insert being provided wi-th a rest and a punch holder;
- said punch holder being provided with a circular groove;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said prismatic punches being provided with guides;
- said central core being provided with a plurality of longitudinal stiffining grooves and a limiting sleeve in its bottom portion;
- a punch guide, disposed below the punch holder and movably mounted on said guiding columns, said punch guide being provided with a plurality of guiding grooves and a circular tooth;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves, in said longitudinal grooves and in said guiding grooves;
- said die being provided with a plurality of radial grooves facing said punches, said radial grooves being open at their bottoms and closed along their external cylindrical portions by a banding ring;
- said profiled ejector being centrally located beneath said die and forming with said die a stamping cavity, said punch holder being disposed above said cavity.
Preferably, the profiled ejector is provided in its top face portion with ejector grooves, in which there are formed connecting bridges of the blank for the face collector.
The advantages of the invention lie in the ability to stamp with the press tool, in a blank face collec-tor, radial grooves with parallel walls and a preset distance between the segments, using a reduced pressing force and A
12~;~3s7 resulting in an increased size accuracy of the produced blank and improved repair suitability of the finished collector.
With these and other objects in view, which will become apparent in the following detailed description, the present invention, which is shown by example only, will be clearly understood in connection with the accompanying drawing, in which:
Fig. 1 is a vertical cross-sectional view of the press tool for face collector, the left side showing the working position, and the right side showing the starting position;
Fig. 2 is a partial cross-sectional view through the prismatic punches and a column of the punch-holder;
Fig. 3 is a partial cross-sectional view along line A-A of Fig. 1 of one quarter of the tool;
Fig. 4 is a diametrical sectional view of a blank for a face collector; and Fig. 5 is a top view of a blank for a face collector.
The press tool for face collector comprises a die 1 with a profiled ejector 3, centrally disposed and circularly oriented in the die. The ejector 3 is provided with ejector grooves 5. The die and the~ejector are mounted onto a bottom plate 2, in the centre of which an ejector pin 25 is fastened by means of a limiter 26.
The die 1 is provided with radial grooves 4, which are closed along its periphery by means of a banding ring 6.
Guiding 20 columns are mounted on bottom plate 2 and a top plate 19 is movably mounted on the guiding columns 20 preferably by limiting sleeves 18.
The blank 7 for the face collector ~not shown) is inserted in the die 1. Over the blank 7, there is disposed a circularly oriented punch holder 8 which is attached to a 1~67~3~7 rigid insert 10 of the top plate 19. The punch holder 8 is pxovided with guide grooves lS and a circular groove 21. In the punch holder 8, there are mounted a rest 9 and a central core 11. In the central core 11, there are machined stiffening grooves 12, and in the bottom portion of the central core 11, there may be disposed a limiting sleeve 13.
A punch guide 16 is movably mounted on said columns 28 preferably by guiding sleeves 17 and is disposed between said die 1 and said punch holder 8. The punch guide 16 is provided with guiding grooves 14 and a circular tooth 22 which may be telescopically shaped.
Prismatic punches 23 are positioned in the fixing grooves 15 of the punch holder 8 and in the stiffening grooves 12 of the central core 11 and in the guiding ~rooves 1514 of the punch guide 16. The punches 23 are provided with guides 24 which will enter into the radial grooves 4 of the die 1 when the press is activated. The punches 23 are circularily oriented and are in position opposite to the radial grooves of the profiled ejector.
20The circular tooth 22 of the punch guide 16 similarly enters into the circular groove 21 of the punch holder 8 when the press is activated.
Also when the press is activated the connecting bridges 28 of the blank for the face connector 7 enter into the ejector grooves 5 of the profiled ejector 3.
Opposite to the connecting bridges 28, there are formed the intersegmental. grooves 27, while between the intersegmental grooves 27 there are formed the collector segments 29.
30The operation of the press tool for face collector, according to the present invention, is as follows:
When the top late 19 moves towards the bottom plate 2, the guides 24 of the punches 23 enter the radial ~L2~i'7~5'7 grooves 4 of the die 1. Then, the prismatic punches 23 penetrate into the blank for face collector 7 until the punch-guide 16 is limited by the die 1, thus forming the intersegmental grooves 27 and the connecting bridges 28 between the collector segmen-ts 29 on the blank 7. In the beginning of the stamping, the circular tooth 22 of the punch-guide 16 increases the longitudinal stability of the prismatic punches 23. During the back stroke, the ejector pin 25 and the profiled ejector 3 ejects the blank for the face collector 7 out of the die 1.
A
Claims (3)
1. A press tool for a face collector, particularly for separating segments of a blank for the face collector of a electric machine, comprising:
- a bottom plate onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
- a top plate movably mounted on said guiding columns, said top plate being provided with a rigid insert in its bottom part;
- said rigid insert being provided with a rest and a punch holder;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said central core being provided with a plurality of longitudinal stiffining grooves;
- a punch guide, disposed below the punch holder and movably mounted on said guiding columns;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves and in said longitudinal grooves;
- said die being provided with a plurality of radial grooves facing said punches.
- a bottom plate onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
- a top plate movably mounted on said guiding columns, said top plate being provided with a rigid insert in its bottom part;
- said rigid insert being provided with a rest and a punch holder;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said central core being provided with a plurality of longitudinal stiffining grooves;
- a punch guide, disposed below the punch holder and movably mounted on said guiding columns;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves and in said longitudinal grooves;
- said die being provided with a plurality of radial grooves facing said punches.
2. A press tool for a face collector, particularly for separating segments of a blank for the face collector of an electric machine, comprising:
- a bottom place onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
- a top plate movably mounted on said guiding columns, said top plate being provided with a rigid insert in its bottom part;
- said rigid insert being provided with a rest and a punch holder;
- said punch holder being provided with a circular groove;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said prismatic punches being provided with guides;
- said central core being provided with a plurality of longitudinal stiffining grooves and a limiting sleeve in its bottom portion;
- a punch guide, disposed below the punch holder and movably mounted on said guiding columns, said punch guide being provided with a plurality of guiding grooves and a circular tooth;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves, in said longitudinal grooves and in said guiding grooves;
- said die being provided with a plurality of radial grooves facing said punches, said radial grooves being open at their bottoms and closed along their external cylindrical portions by a banding ring;
- said profiled ejector being centrally located beneath said die and forming with said die a stamping cavity, said punch holder being disposed above said cavity.
- a bottom place onto which there are mounted a die and a profiled ejector inserted into the die;
- a plurality of guiding columns mounted on said bottom plate, said guiding columns being provided with guiding sleeves;
- a top plate movably mounted on said guiding columns, said top plate being provided with a rigid insert in its bottom part;
- said rigid insert being provided with a rest and a punch holder;
- said punch holder being provided with a circular groove;
- a plurality of prismatic punches mounted in said punch holder and surrounding a central core;
- said prismatic punches being provided with guides;
- said central core being provided with a plurality of longitudinal stiffining grooves and a limiting sleeve in its bottom portion;
- a punch guide, disposed below the punch holder and movably mounted on said guiding columns, said punch guide being provided with a plurality of guiding grooves and a circular tooth;
- said punch holder being provided with a plurality of guide grooves, said punches being disposed in said guide grooves, in said longitudinal grooves and in said guiding grooves;
- said die being provided with a plurality of radial grooves facing said punches, said radial grooves being open at their bottoms and closed along their external cylindrical portions by a banding ring;
- said profiled ejector being centrally located beneath said die and forming with said die a stamping cavity, said punch holder being disposed above said cavity.
3. A press tool for face collector as claimed in claim 2, wherein the profiled ejector is provided in its top face portion with ejector grooves, in which there are formed connecting bridges of the blank for the face collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000525754A CA1267357A (en) | 1986-12-18 | 1986-12-18 | Press tool for face collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000525754A CA1267357A (en) | 1986-12-18 | 1986-12-18 | Press tool for face collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1267357A true CA1267357A (en) | 1990-04-03 |
Family
ID=4134585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000525754A Expired CA1267357A (en) | 1986-12-18 | 1986-12-18 | Press tool for face collector |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1267357A (en) |
-
1986
- 1986-12-18 CA CA000525754A patent/CA1267357A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |