CN211437754U - Cold extrusion die - Google Patents
Cold extrusion die Download PDFInfo
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- CN211437754U CN211437754U CN201921943403.4U CN201921943403U CN211437754U CN 211437754 U CN211437754 U CN 211437754U CN 201921943403 U CN201921943403 U CN 201921943403U CN 211437754 U CN211437754 U CN 211437754U
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Abstract
The utility model relates to a fine blanking field, in particular to a cold extrusion die, which comprises a male die, a cold extrusion female die and a material ejecting mechanism, wherein the cold extrusion female die is matched with the male die to work, a die inlet at the upper part of the cold extrusion female die is of a horn-mouth-shaped secondary chamfering structure, and the bottom of the cold extrusion female die is directly provided with an opening; the material ejecting mechanism is arranged at the center of the bottom of the cold extrusion female die and is used for ejecting a workpiece in the cold extrusion female die; the utility model discloses a cold extrusion mould, the machining precision is high, can realize the corner collapse feed supplement to reduce the corner collapse, eliminate the corner collapse even, obtain qualified product, thereby improve the product quality and the life of punching the piece, reach the purpose that improves the product quality.
Description
Technical Field
The utility model relates to a fine blanking field, a cold extrusion mould specifically says so.
Background
The improvement of the collapse angle of the triangle at the round/sharp corner of the fine blanking part is very important work in the fine blanking industry. The reason for the formation of the collapse angle is a collapse phenomenon caused by plastic deformation and metal flow of the material near the cutting edge of the die when the metal material enters the die. The reduction of the collapse angle of the fine blanking part is of great significance for improving the performance and the service life of the fine blanking part, and the reduction of the collapse angle of the fine blanking part is a technical problem in actual production for a long time; for some fine blanking parts which are strictly required to be meshed and matched, the customer requires that the collapse angle is less than 10% of the thickness of the material; even no corner collapse; therefore, the improvement of the corner collapse and the reduction of the corner collapse are important research subjects in the fine blanking industry, otherwise, the part performance and the service life of a fine blanking part are greatly reduced, and the product quality is seriously influenced, but the existing cold extrusion die is not designed in the aspect of reducing the corner collapse. Therefore, how to overcome the above technical problems and disadvantages is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an invention aim at overcoming the defect that describes in the background art to realize a cold extrusion mould, this cold extrusion mould can realize the corner collapse feed supplement, thereby reduce the corner collapse, eliminate the corner collapse even, obtain qualified product, thereby improve the product quality and the life of high-pressure punching spare, reach the purpose that improves the product quality.
In order to achieve the purpose of the invention, the technical scheme of the utility model is as follows: a cold extrusion die comprises a male die, a cold extrusion female die and a material ejection mechanism, wherein the cold extrusion female die is matched with the male die to work, a die entrance at the upper part of the cold extrusion female die is of a horn-mouth-shaped secondary chamfer structure, and the bottom of the cold extrusion female die is directly communicated with an opening; the ejection mechanism is arranged at the center of the bottom of the cold extrusion female die and used for ejecting the workpiece in the cold extrusion female die.
Further, the secondary chamfering structure comprises an outer chamfering, a transition fillet and an inner chamfering, wherein the outer chamfering is a primary chamfering and is positioned at a die inlet of the cold extrusion female die; the inner chamfers are secondary chamfers respectively and are positioned on the inner side of a die inlet of the cold extrusion female die; the transition fillet is positioned between the outer chamfer and the inner chamfer to connect the outer chamfer and the inner chamfer in a smooth transition way.
Furthermore, the included angle between the outer chamfer and the axial direction of the cold extrusion female die is 13-16 degrees, and the included angle between the inner chamfer and the axial direction of the cold extrusion female die is 3-5 degrees.
Furthermore, the liftout mechanism includes a discharging block, an intermediate plate and a nitrogen spring, the discharging block is located at the bottom in the cold extrusion die, the nitrogen spring is located below the cold extrusion die, and the intermediate plate is located between the cold extrusion die and the nitrogen spring.
The utility model discloses a processing method of cold extrusion mould production minor collapsing angle fine blanking part, including following step:
step 1: measuring the size of the circle/sharp corner of the fine punching piece and the material thickness to obtain the size a of the circle/sharp corner of the fine punching piece and the material thickness h 1;
step 2: according to the following table, table look-up is carried out to obtain the corner collapse height h2 of different fine blanking pieces and the corresponding numerical value of the material supplementing area, the material supplementing is carried out on the fine blanking piece to be processed, and then the size of the fine blanking piece is determined;
and step 3: finishing blanking processing of the fine blanking material sheet on a fine blanking machine by using a fine blanking die according to the size of the fine blanking material sheet;
and 4, step 4: and (3) placing the fine blanking sheet after blanking on the cold extrusion die to finish cold extrusion, and mounting the cold extrusion die on a conventional press machine to perform cold extrusion operation to obtain the fine blanking piece with small collapse angle required by the composite drawing.
The utility model discloses a cold extruding die's beneficial effect:
1. the utility model discloses a cold extrusion mould can reduce the corner collapse, eliminates the corner collapse even, obtains qualified product to improve the product quality and the life of accurate punching piece, utilize this mould, can obtain the accurate punching piece that the corner collapse of accurate punching piece is less than 10%, reach the purpose that improves the product quality.
2. The utility model discloses a cold extrusion mould, low in production cost is honest and clean, and the mould is maintained portably to production technology is simple relatively, and the suitability is wider, is applicable to the more complicated parts machining of various geometric shapes.
3. The utility model discloses a cold extrusion die can produce the very high essence of product quality and dash the piece, and the part of little corner collapse or no corner collapse can directly be used for mechanical assembly, improves the intensity and the performance of mechanical product, saves loaded down with trivial details aftertreatment manufacturing procedure.
4. The utility model discloses a cold extrusion die, a chamfer is used for the direction of essence towards the piece in the secondary chamfer structure, make the essence towards the piece and get into cold extrusion die more easily, after the essence towards the piece and get into cold extrusion die and fix a position through a chamfer bottom that the angle is great, the essence towards the piece again through the transition fillet, from the cold crowded size of great cold gradual transition cold extrusion to the cold crowded size of design that is close the essence towards the piece, and finally, will be close the final cold crowded little corner collapse part that accords with design size of the essence towards the piece of design size through the less secondary chamfer of angle, the machining precision of assurance part that can furthest.
Drawings
Fig. 1 is a schematic structural view of a cold extrusion die of the present invention;
FIG. 2 is an enlarged schematic view of A in FIG. 1;
FIG. 3 is a schematic feed of a fine blanking unit;
FIG. 4 is a schematic diagram of the corner collapse formation and feeding of the fine blanking.
In the figure: 1-male die, 2-cold extrusion female die, 3-material ejection mechanism, 301-material unloading block, 302-intermediate plate, 303-nitrogen spring, 4-secondary chamfer structure, 401-outer chamfer, 402-transition fillet and 403-inner chamfer.
Detailed Description
The cold extrusion die of the present invention will be described in more detail by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1, the cold extrusion die of the present embodiment includes a male die, a cold extrusion female die working in cooperation with the male die, and an ejection mechanism, the cold extrusion die of the present invention has a low requirement on a carrier, and the cold extrusion die can be installed on a conventional press; the die inlet at the upper part of the cold extrusion female die is of a horn-mouth-shaped secondary chamfer structure, and the bottom of the cold extrusion female die is directly provided with an opening.
In the implementation, referring to fig. 2, the secondary chamfering structure includes an outer chamfer, a transition fillet and an inner chamfer, and the outer chamfer is a primary chamfer and is located at a die inlet of the cold extrusion female die; the inner chamfers are secondary chamfers respectively and are positioned on the inner side of a die inlet of the cold extrusion female die; the transition fillet is positioned between the outer chamfer and the inner chamfer and is used for connecting the outer chamfer and the inner chamfer in a smooth transition way; the included angle between the outer chamfer and the axial direction of the cold extrusion female die is 13-16 degrees, and the included angle between the inner chamfer and the axial direction of the cold extrusion female die is 3-5 degrees; a chamfer is used for the direction of smart piece of dashing in the secondary chamfer structure, make the smart piece of dashing get into cold crowded die more easily, after the smart piece of dashing gets into cold crowded die and fixes a position through the great chamfer bottom of angle, the smart piece of dashing passes through the transition fillet again, from great cold crowded cold design cold crowded size of gradually transiting to close the smart piece of dashing, finally, will be close to the final cold crowded little angle of collapse part for meeting design size of the smart piece of dashing of design size through the less secondary chamfer of angle, furthest's assurance part machining precision.
The material ejecting mechanism is arranged at the center of the bottom of the cold extrusion female die and is used for ejecting a workpiece in the cold extrusion female die; the material ejecting mechanism comprises a material unloading block, an intermediate plate and a nitrogen spring, the material unloading block is located at the bottom in the cold extrusion female die, the nitrogen spring is located below the cold extrusion female die, and the intermediate plate is located between the cold extrusion female die and the nitrogen spring.
The part enters the cold extrusion concave die, the part needs to be ejected out, and a plurality of methods are adopted for ejecting out the part, for example, a compressed air cylinder and polyurethane rubber are used as force sources, and the strength of the compressed air cylinder is difficult to control after experiments; the resilience of the polyurethane rubber is too small, the volume is too large, and the polyurethane rubber is not good for use. Through experiments, a nitrogen spring is selected as a stable and reliable force source to eject a part, and the part is ejected smoothly finally.
The processing method for producing the fine blanking part with the small collapsed angle by using the cold extrusion die comprises the following steps:
step 1: measuring the size of the circle/sharp corner of the fine blanking piece and the material thickness to obtain the size a of the circle/sharp corner of the fine blanking piece and the material thickness h1, and referring to fig. 4;
step 2: according to the following table, table look-up is carried out to obtain the corner collapse height h2 of different fine blanking pieces and the corresponding numerical value of the material supplementing area, the material supplementing is carried out on the fine blanking piece to be processed, and then the size of the fine blanking piece is determined;
in this step, the circle/point angle of the fine blanking member is formed into a triangular shape, see fig. 3 and 4; through experiments, data of the relation between the size a of the round/sharp corner and the thickness h1 of the material, the height h2 of the collapsed corner and the area of the fed materials are obtained, and the data are shown in the following table; we conveniently obtain the area of the fed material at the corner collapse of the fine blanking part by looking up the table.
For example, when the material thickness h1 is 4 mm and the part circle/tip angle size a is 300, the corner collapse height h2 is 1.6 mm, and the corresponding corner collapse patch area S is 0.5 mm.
For another example: when the material thickness h1 is 10 mm and the size a of the circle/tip angle of the part is 900, the corner collapse height h2 is 2.0 mm, and the corresponding corner collapse supplemented area S is 0.75 mm.
And step 3: finishing blanking processing of the fine blanking material sheet on a fine blanking machine by using a fine blanking die according to the size of the fine blanking material sheet;
and 4, step 4: and (3) placing the fine blanking sheet after blanking on the cold extrusion die to finish cold extrusion, and mounting the cold extrusion die on a conventional press machine to perform cold extrusion operation to obtain the fine blanking piece with small collapse angle required by the composite drawing.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes may be made to the specific embodiments without departing from the concept of the present invention, and various combinations of the technical features and structures of the present invention may be implemented without departing from the scope of the present invention.
Claims (4)
1. The utility model provides a cold extrusion mould, includes the terrace die, with the cold extrusion die and the liftout mechanism of terrace die cooperation work, its characterized in that: the die inlet at the upper part of the cold extrusion female die is of a horn-mouth-shaped secondary chamfer structure, and the bottom of the cold extrusion female die is directly communicated with an opening; the ejection mechanism is arranged at the center of the bottom of the cold extrusion female die and used for ejecting the workpiece in the cold extrusion female die.
2. A cold extrusion die according to claim 1, wherein: the secondary chamfering structure comprises an outer chamfering, a transition fillet and an inner chamfering, wherein the outer chamfering is a primary chamfering and is positioned at a die inlet of the cold extrusion female die; the inner chamfers are secondary chamfers respectively and are positioned on the inner side of a die inlet of the cold extrusion female die; the transition fillet is positioned between the outer chamfer and the inner chamfer to connect the outer chamfer and the inner chamfer in a smooth transition way.
3. A cold extrusion die according to claim 2, wherein: the included angle between the outer chamfer and the axial direction of the cold extrusion female die is 13-16 degrees, and the included angle between the inner chamfer and the axial direction of the cold extrusion female die is 3-5 degrees.
4. A cold extrusion die according to claim 1, wherein: the material ejecting mechanism comprises a material unloading block, an intermediate plate and a nitrogen spring, the material unloading block is located at the bottom in the cold extrusion female die, the nitrogen spring is located below the cold extrusion female die, and the intermediate plate is located between the cold extrusion female die and the nitrogen spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921943403.4U CN211437754U (en) | 2019-11-12 | 2019-11-12 | Cold extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921943403.4U CN211437754U (en) | 2019-11-12 | 2019-11-12 | Cold extrusion die |
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| CN211437754U true CN211437754U (en) | 2020-09-08 |
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| CN201921943403.4U Active CN211437754U (en) | 2019-11-12 | 2019-11-12 | Cold extrusion die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110883220A (en) * | 2019-11-12 | 2020-03-17 | 河南星光机械制造有限公司 | Cold extrusion die and machining method of small-collapse-angle fine-blanking part |
-
2019
- 2019-11-12 CN CN201921943403.4U patent/CN211437754U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110883220A (en) * | 2019-11-12 | 2020-03-17 | 河南星光机械制造有限公司 | Cold extrusion die and machining method of small-collapse-angle fine-blanking part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A cold extrusion die Effective date of registration: 20211012 Granted publication date: 20200908 Pledgee: Bank of China Limited Dengzhou sub branch Pledgor: HENAN STARLIGHT MECHANICAL Co.,Ltd. Registration number: Y2021980010590 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220826 Granted publication date: 20200908 Pledgee: Bank of China Limited Dengzhou sub branch Pledgor: HENAN STARLIGHT MECHANICAL CO.,LTD. Registration number: Y2021980010590 |