CN114951429B - Progressive die precision cold forging device - Google Patents
Progressive die precision cold forging device Download PDFInfo
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- CN114951429B CN114951429B CN202210412915.8A CN202210412915A CN114951429B CN 114951429 B CN114951429 B CN 114951429B CN 202210412915 A CN202210412915 A CN 202210412915A CN 114951429 B CN114951429 B CN 114951429B
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- cold forging
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- 238000010273 cold forging Methods 0.000 title claims abstract description 30
- 230000000750 progressive effect Effects 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 129
- 238000004080 punching Methods 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims description 121
- 238000001125 extrusion Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 238000005242 forging Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 21
- 239000000047 product Substances 0.000 description 15
- 238000003825 pressing Methods 0.000 description 11
- 238000000465 moulding Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a precision cold forging device of progressive dies, wherein an insert hole is formed on the upper surface of each lower die holder and is positioned right below an upper punch, a forming gap into which the lower part of a feed belt is extruded is formed between the upper end of the insert and the inner wall of the upper end of the insert hole, a plurality of guide holes are formed on the upper surface of a lower base plate and are positioned on two sides of the feed belt, the lower end of a guide pin capable of moving up and down is embedded into the guide holes and is connected with a first elastic piece, the upper end of the guide pin extends upwards from the upper surface of the lower base plate and is provided with a groove into which the edge of the feed belt is embedded, 2 punching convex dies are arranged on the upper base plate and are positioned on the rear side of the upper punch, and the 2 punching convex dies which are arranged at intervals perpendicular to the advancing direction of the feed belt are respectively positioned above the two edges of the feed belt and are used for punching and forming 2 positioning holes on the feed belt. The invention realizes the high-efficiency and high-precision processing of the precision part with three-dimensional structural characteristics and small size, and simultaneously further improves the precision of forging and forming the material belt.
Description
Technical Field
The invention relates to a progressive die precise cold forging device, and belongs to the technical field of electronic products.
Background
The cold forging process is a process of obtaining parts with required appearance, dimension and certain mechanical property by plastic flow deformation of a metal blank in a die cavity under the action of a certain speed and high pressure given by a proper die according to a metal plastic deformation principle.
The progressive die with the characteristics of high precision and high efficiency is mainly used for stamping production of small and medium-sized precise parts at present, and mainly completes actions such as blanking, bending, stretching and the like on different stations of the die in one stroke of a punch press, but the progressive die is mainly characterized in that a sheet-shaped product is a main body and cannot be used for processing products with 3D characteristics.
For products with small size, high precision and complex three-dimensional structural characteristics, forging and pressing cannot open the die because the size is too small, and problems of low yield, excessively thin and easily deformed side walls, excessively high processing cost of monovalent products and the like can be encountered after a CNC (computer numerical control) process is adopted.
Disclosure of Invention
The invention aims to provide a progressive die precise cold forging device which is used for continuously extruding and forming a material belt in multiple stations, and realizing high-efficiency and high-precision processing of precise parts with three-dimensional structural characteristics and small size through gradual flow and shaping deformation of the material belt.
In order to achieve the above purpose, the invention adopts the following technical scheme: a progressive die precision cold forging processing device for precision part processing, comprising: the feeding mechanism is provided with a lower substrate arranged on the upper surface of the base, an upper substrate arranged on the lower surface of the top plate and a material belt;
The precise part further comprises a body and a hollow column part formed in the center of the lower part of the body, wherein the wall thickness of one end of the hollow column part, which is close to the body, is larger than that of the other end of the hollow column part, the feeding mechanism is positioned at the outer sides of the feeding ends of the lower substrate and the upper substrate, one end of the material belt is arranged on the feeding mechanism, and the other end of the material belt intermittently moves from the feeding ends of the lower substrate and the upper substrate to the discharging ends of the material belt;
The upper substrate is provided with a plurality of upper punches which are arranged at intervals along the advancing direction of the material belt, the lower ends of the upper punches which are vertically arranged are exposed from the lower surface of the upper substrate and are used for being in extrusion contact with the upper surface of the material belt, the upper surface of the lower substrate is embedded and provided with a plurality of lower die holders corresponding to the upper punches, the upper surface of each lower die holder is positioned right below the upper punch and provided with a vertically arranged insert hole, the lower end of one insert is embedded into the lower part of the insert hole, and a forming gap for extruding the lower part of the material belt is formed between the upper end of the insert and the inner wall of the upper end of the insert hole;
The upper surface of the lower substrate is provided with a plurality of guide holes on two sides of the material belt, the lower end of a guide pin capable of moving up and down is embedded into the guide holes and connected with a first elastic piece, the upper end of the guide pin extends upwards from the upper surface of the lower substrate and is provided with a groove embedded by the edge of the material belt, and when the first elastic piece is in a natural diastole state, the material belt embedded in the groove on the guide pin is arranged with the upper surface of the lower substrate at intervals;
The upper substrate is provided with 2 punching male dies at the rear side of the upper punch, the 2 punching male dies are arranged above two edges of the material belt at intervals perpendicular to the advancing direction of the material belt and used for punching to form 2 positioning holes on the material belt, the upper surface of the lower substrate is provided with a plurality of punching female dies corresponding to the punching male dies in an embedded manner, the upper ends of the positioning pins embedded into the positioning holes on the material belt are respectively arranged on the upper substrate, and the positioning pins matched with the positioning holes on the same side of the material belt are arranged at intervals along the advancing direction of the material belt.
The further improved scheme in the technical scheme is as follows:
1. In the above scheme, be provided with a fly leaf below the upper base plate, with upper base plate parallel arrangement the fly leaf can follow vertical direction and remove for the upper surface of fly leaf is laminated or is kept away from with the lower surface of upper base plate, be provided with a plurality of push rod between upper base plate and the fly leaf, can follow vertical direction and remove in the upper end embedding second mounting hole on the upper base plate and be connected with the second elastic component of a vertical setting, the lower extreme of push rod and the upper surface extrusion contact of fly leaf, works as the fly leaf is kept away from the upper base plate when the fly leaf is kept away from in the fly leaf, works as when the fly leaf laminating upper base plate, the second elastic component is in extrusion state and the lower extreme of upper punch wears out fly leaf and takes upper surface extrusion contact.
2. In the above scheme, the mounting hole corresponding to the guide hole is formed in the upper surface of the base, the lower end of the first elastic piece is embedded into the mounting hole, and the upper end of the first elastic piece is embedded into the guide hole communicated with the mounting hole and is connected with the lower end of the guide pin.
3. In the above scheme, the lower substrate further comprises a first lower substrate layer and a second lower substrate layer which are overlapped up and down, and the first lower substrate layer positioned on the upper layer is provided with an installation through hole for embedding the lower die holder.
4. In the scheme, the first lower substrate layer and the second lower substrate layer are connected through bolts.
5. In the above scheme, a limiting block is detachably arranged at the top of the third mounting hole which is vertically penetrated.
6. In the scheme, the limiting block is connected with the third mounting hole through threads.
7. In the scheme, the lower end face of the locating pin is lower than the lower end faces of the upper punch and the punching male die.
8. In the above scheme, the upper surface of the lower substrate is provided with the avoidance hole corresponding to the positioning pin.
9. In the above scheme, the first elastic piece is a spring.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. The progressive die precise cold forging device combines the advantages of two processes, performs precise cold forging through the progressive die, thereby improving the production efficiency of cold forging products, and performs multi-station continuous extrusion molding on a material belt through intermittent movement of the material belt and matching of a plurality of groups of upper punches and a lower die seat with an insert, and realizes high-efficiency and high-precision processing of precise parts with three-dimensional structural characteristics and small size through gradual flow and shaping deformation of the material belt; further, a plurality of guide holes are formed in the upper surface of the lower substrate and located on two sides of the material belt, the lower end of a guide pin is embedded into the guide holes, the upper end of the guide pin extends upwards from the upper surface of the lower substrate and is provided with a groove embedded by the edge of the material belt, so that the position precision of the material belt in the moving process is improved, the condition that the forming positions of the material belt are inconsistent due to deviation in the moving process of a plurality of forming stations is avoided, and the precision of multistage forming processing of parts is ensured; and the lower end of the guide pin capable of moving up and down is embedded into the guide hole and connected with an elastic piece, when the elastic piece is in a natural diastole state, a material belt with the edge embedded into a groove on the guide pin is arranged at intervals with the upper surface of the lower substrate, and the material belt can be lifted through resetting of the elastic piece after each forming operation is finished, so that the situation that the material belt is locally retained in a forming gap to move towards the next station is avoided, and the processing precision and efficiency are further ensured.
2. The invention relates to a progressive die precision cold forging processing device, wherein a plurality of punching female dies corresponding to punching male dies are embedded and installed on the upper surface of a lower substrate, a plurality of positioning pins for being embedded into positioning holes in a material belt are respectively installed on the upper substrate, a plurality of positioning pins matched with the positioning holes on the same side of the material belt are arranged at equal intervals along the advancing direction of the material belt, and the positioning pins are matched with the positioning holes on the material belt, so that the consistency of the advancing distance of the material belt each time can be ensured, the material belt can be positioned at each station before the forming processing, the stress of the material belt is prevented from being deviated in the forming process, and the processing precision is further improved; further, be provided with a plurality of push rod that can follow vertical direction and remove between its upper substrate and the fly leaf, the upper end of this push rod imbeds in the second mounting hole on the upper substrate and is connected with the second elastic component of a vertical setting, the lower extreme of push rod and the upper surface extrusion contact of fly leaf, through the reciprocate of fly leaf under the effect of second elastic component, both can protect the upper punch through the flexible of upper punch for the fly leaf, can carry out the precompaction of whole face to the material area through the fly leaf again, avoid the skew of material area, further improve the precision of forging and pressing the shaping to the material area.
Drawings
FIG. 1 is a schematic view of a precision part for machining according to the present invention;
FIG. 2 is a schematic diagram of the overall structure of the progressive die precision cold forging device of the invention;
FIG. 3 is a longitudinal cross-sectional elevation view of the progressive die precision cold forging apparatus of the present invention;
FIG. 4 is an enlarged view of the invention at A of FIG. 3;
FIG. 5 is a front view of a transverse cross section of the progressive die precision cold forging apparatus of the present invention;
FIG. 6 is an enlarged view of FIG. 5 at B in accordance with the present invention;
fig. 7 is a partial structural perspective view of the progressive die precision cold forging apparatus of the present invention.
In the above figures: 1. a base; 2. a lower substrate; 201. a first lower substrate; 202. a second lower substrate; 3. a top plate; 301. a third mounting hole; 4. an upper substrate; 401. a second mounting hole; 5. a material belt; 501. positioning holes; 6. an upper punch; 7. a lower die holder; 8. inserting holes; 9. an insert; 10. forming a gap; 11. a guide pin; 12. a groove; 13. a guide hole; 14. a first elastic member; 15. a mounting hole; 161. a punching male die; 162. punching a female die; 17. a positioning pin; 18. a movable plate; 19. a push rod; 20. a second elastic member; 21. a clearance groove; 22. a limiting block; 23. a clearance hole; 100. precision parts; 101. a body; 102. a hollow column portion; 200. and a feeding mechanism.
Detailed Description
The invention is further described below with reference to examples:
In the description of this patent, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element in question must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in this patent will be understood by those of ordinary skill in the art in a specific context.
Example 1: a progressive die precision cold forging apparatus for precision part 100 processing, comprising: a lower substrate 2 arranged on the upper surface of the base 1, an upper substrate 4 arranged on the lower surface of the top plate 3 and a feeding mechanism 200 provided with a material belt 5;
The precision part 100 further comprises a body 101 and a hollow column part 102 formed in the center of the lower part of the body 101, wherein the wall thickness of one end of the hollow column part 102 close to the body 101 is larger than that of the other end of the hollow column part, the feeding mechanism 200 is positioned outside the feeding ends of the lower substrate 2 and the upper substrate 4, one end of the material belt 5 is arranged on the feeding mechanism 200, and the other end of the material belt 5 intermittently moves from the feeding ends of the lower substrate 2 and the upper substrate 4 to the discharging ends thereof;
The upper substrate 4 is provided with a plurality of upper punches 6 which are arranged at intervals along the advancing direction of the material belt 5, the lower ends of the upper punches 6 which are vertically arranged are exposed from the lower surface of the upper substrate 4 and are used for being in extrusion contact with the upper surface of the material belt 5, the upper surface of the lower substrate 2 is embedded and provided with a plurality of lower die holders 7 which correspond to the upper punches 6, the upper surface of each lower die holder 7 is positioned right below the upper punch 6 and provided with a vertically arranged insert hole 8, the lower ends of an insert 9 are embedded into the lower parts of the insert holes 8, and a forming gap 10 for the lower part of the material belt 5 to be extruded is formed between the upper ends of the insert 9 and the inner wall of the upper ends of the insert holes 8;
The upper surface of the lower substrate 2 and two sides of the material belt 5 are provided with a plurality of guide holes 13, the lower end of a guide pin 11 capable of moving up and down is embedded in the guide holes 13 and connected with a first elastic piece 14, the upper end of the guide pin 11 extends upwards from the upper surface of the lower substrate 2 and is provided with a groove 12 embedded by the edge of the material belt 5, and when the first elastic piece 14 is in a natural diastole state, the material belt 5 embedded in the groove 12 on the guide pin 11 and the upper surface of the lower substrate 2 are arranged at intervals;
the upper substrate 4 is provided with 2 punching male dies 161 at the rear side of the upper punch 6, the 2 punching male dies 161 which are arranged at intervals perpendicular to the advancing direction of the material belt 5 are respectively arranged above two edges of the material belt 5 and used for punching to form 2 positioning holes 501 on the material belt 5, the upper surface of the lower substrate 2 is embedded with a plurality of punching female dies 162 which correspond to the punching male dies 161, the upper ends of a plurality of positioning pins 17 which are embedded into the positioning holes 501 on the material belt 5 are respectively arranged on the upper substrate 4, and a plurality of positioning pins 17 which are matched with the positioning holes 501 on the same side of the material belt 5 are arranged at equal intervals along the advancing direction of the material belt 5.
A movable plate 18 is disposed below the upper substrate 4, the movable plate 18 parallel to the upper substrate 4 is capable of moving along a vertical direction, so that an upper surface of the movable plate 18 is attached to or away from a lower surface of the upper substrate 4, a plurality of push rods 19 are disposed between the upper substrate 4 and the movable plate 18, an upper end of the push rods 19 capable of moving along the vertical direction is embedded into a second mounting hole 401 on the upper substrate 4 and is connected with a second elastic member 20 disposed vertically, a lower end of the push rods 19 is in pressing contact with an upper surface of the movable plate 18, when the movable plate 18 is away from the upper substrate 4, a lower end of the upper punch 6 disposed vertically is immersed into the movable plate 18, and when the movable plate 18 is attached to the upper substrate 4, the second elastic member 20 is in a pressing state and a lower end of the upper punch 6 is penetrated out of the movable plate 18 and is in pressing contact with an upper surface of the material belt 5.
The lower substrate 2 further includes a first lower substrate layer 201 and a second lower substrate layer 202 stacked one above the other, and the first lower substrate layer 201 located on the upper layer is provided with a mounting through hole into which the lower die holder 7 is inserted.
The first lower substrate layer 201 and the second lower substrate layer 202 are connected by bolts.
A stopper is detachably mounted on top of the third mounting hole 301, which penetrates up and down.
The stopper is screwed to the third mounting hole 301.
The lower end surface of the positioning pin 17 is lower than the lower end surfaces of the upper punch 6 and the punching punch 161.
The upper surface of the lower substrate 2 is provided with a clearance hole 23 corresponding to the positioning pin 17.
The groove 12 is an annular groove extending in the circumferential direction of the guide pin 11.
The upper substrate 4 has a clearance groove 21 formed on a surface facing the guide pin 11 to allow the upper end of the guide pin 11 to be fitted therein.
Example 2: a progressive die precision cold forging apparatus for precision part 100 processing, comprising: a lower substrate 2 arranged on the upper surface of the base 1, an upper substrate 4 arranged on the lower surface of the top plate 3 and a feeding mechanism 200 provided with a material belt 5;
The precision part 100 further comprises a body 101 and a hollow column part 102 formed in the center of the lower part of the body 101, wherein the wall thickness of one end of the hollow column part 102 close to the body 101 is larger than that of the other end of the hollow column part, the feeding mechanism 200 is positioned outside the feeding ends of the lower substrate 2 and the upper substrate 4, one end of the material belt 5 is arranged on the feeding mechanism 200, and the other end of the material belt 5 intermittently moves from the feeding ends of the lower substrate 2 and the upper substrate 4 to the discharging ends thereof;
The upper substrate 4 is provided with a plurality of upper punches 6 which are arranged at intervals along the advancing direction of the material belt 5, the lower ends of the upper punches 6 which are vertically arranged are exposed from the lower surface of the upper substrate 4 and are used for being in extrusion contact with the upper surface of the material belt 5, the upper surface of the lower substrate 2 is embedded and provided with a plurality of lower die holders 7 which correspond to the upper punches 6, the upper surface of each lower die holder 7 is positioned right below the upper punch 6 and provided with a vertically arranged insert hole 8, the lower ends of an insert 9 are embedded into the lower parts of the insert holes 8, and a forming gap 10 for the lower part of the material belt 5 to be extruded is formed between the upper ends of the insert 9 and the inner wall of the upper ends of the insert holes 8;
The upper surface of the lower substrate 2 and two sides of the material belt 5 are provided with a plurality of guide holes 13, the lower end of a guide pin 11 capable of moving up and down is embedded in the guide holes 13 and connected with a first elastic piece 14, the upper end of the guide pin 11 extends upwards from the upper surface of the lower substrate 2 and is provided with a groove 12 embedded by the edge of the material belt 5, and when the first elastic piece 14 is in a natural diastole state, the material belt 5 embedded in the groove 12 on the guide pin 11 and the upper surface of the lower substrate 2 are arranged at intervals;
the upper substrate 4 is provided with 2 punching male dies 161 at the rear side of the upper punch 6, the 2 punching male dies 161 which are arranged at intervals perpendicular to the advancing direction of the material belt 5 are respectively arranged above two edges of the material belt 5 and used for punching to form 2 positioning holes 501 on the material belt 5, the upper surface of the lower substrate 2 is embedded with a plurality of punching female dies 162 which correspond to the punching male dies 161, the upper ends of a plurality of positioning pins 17 which are embedded into the positioning holes 501 on the material belt 5 are respectively arranged on the upper substrate 4, and a plurality of positioning pins 17 which are matched with the positioning holes 501 on the same side of the material belt 5 are arranged at equal intervals along the advancing direction of the material belt 5.
A movable plate 18 is disposed below the upper substrate 4, the movable plate 18 parallel to the upper substrate 4 is capable of moving along a vertical direction, so that an upper surface of the movable plate 18 is attached to or away from a lower surface of the upper substrate 4, a plurality of push rods 19 are disposed between the upper substrate 4 and the movable plate 18, an upper end of the push rods 19 capable of moving along the vertical direction is embedded into a second mounting hole 401 on the upper substrate 4 and is connected with a second elastic member 20 disposed vertically, a lower end of the push rods 19 is in pressing contact with an upper surface of the movable plate 18, when the movable plate 18 is away from the upper substrate 4, a lower end of the upper punch 6 disposed vertically is immersed into the movable plate 18, and when the movable plate 18 is attached to the upper substrate 4, the second elastic member 20 is in a pressing state and a lower end of the upper punch 6 is penetrated out of the movable plate 18 and is in pressing contact with an upper surface of the material belt 5.
The upper surface of the base 1 is provided with a mounting hole 15 corresponding to the guide hole 13, the lower end of the first elastic member 14 is embedded in the mounting hole 15, and the upper end of the first elastic member 14 is embedded in the guide hole 13 communicated with the mounting hole 15 and is connected with the lower end of the guide pin 11.
The lower substrate 2 further includes a first lower substrate layer 201 and a second lower substrate layer 202 stacked one above the other, and the first lower substrate layer 201 located on the upper layer is provided with a mounting through hole into which the lower die holder 7 is inserted.
The first lower substrate layer 201 and the second lower substrate layer 202 are connected by bolts.
A stopper is detachably mounted on top of the third mounting hole 301, which penetrates up and down.
The lower end surface of the positioning pin 17 is lower than the lower end surfaces of the upper punch 6 and the punching punch 161.
The first elastic member 14 is a spring.
The groove 12 is an annular groove extending in the circumferential direction of the guide pin 11.
The ratio of the thickness of the body 101 to the thickness of the material tape 5 is 1:4.
Further explanation of the above embodiments is as follows:
The technical scheme of the patent mainly comes from the development process of one of the explosion-proof battery cell assemblies, namely a pole, as shown in a figure 2, the maximum outline dimension of the product processed by the patent is only 4.40mm multiplied by 3.20mm multiplied by 1.65mm, the product has two-stage 3D characteristics, the raw material is AL3003, the plasticity is good, and the 3D characteristic molding is facilitated;
Based on the characteristics of small product size, high precision and complex characteristics, the production process is primarily evaluated to be forging and pressing or CNC, but because the size is too small, the forging and pressing can not be opened, the problems of low yield, too thin and easy deformation of the side wall, too high single PCS cost and the like are encountered after the CNC process is adopted, and the project falls into the dead office;
Aiming at the products with high precision, small size and complex structural characteristics, the multi-step continuous die forging production method is provided, and if the progressive die cold forging processing is to be realized, the key point is that the material flow is accurately controlled, and the forming force is reduced; the patent is mainly aimed at metal filling capacity and forming capacity in progressive die cold forging forming;
For a single product, designing a forming process, firstly processing a geometric model, adopting a multi-step forming process, namely adopting software UG to construct a geometric solid model according to each gradual change process deduced according to a plastic forming theory, attempting to analyze the feasibility of forming by using finite element software Deform-3D, and then adopting the finite element software Deform-3D to analyze and verify the process;
The Al3003 coiled material with the thickness of 0.8mm is selected as the material, the first forming and the second forming are both carried out in the thickness direction, the thickness of the material is taken as 0.2mm of the final product during the third forming, the inner and outer R angles are gradually formed from large to small, and the phenomenon of incomplete 3D characteristic forming of the product can be avoided as far as possible;
Considering that the size of the product is too small, the risk that the product is broken in a die cavity possibly occurs in the demolding process, so that the draft angle of 1-3 degrees is respectively increased on the inner and outer walls of the first molding and the second molding, thereby facilitating demolding;
according to the analysis of the single process molding as above, the result has the feasibility of molding, and thus the single forging molding process thereof is introduced into the continuous die material belt.
When the progressive die precise cold forging device is adopted, the working principle is as follows: when the feeding mechanism works, the feeding mechanism is started, the material belt is placed at the feeding end, the edge of the material belt is embedded into the groove of the guide pin and moves from the discharging end of the feeding end net, when the material belt moves to the position below the punching male die, the punching male die is matched with the punching female die, and positioning holes are formed at two ends of the edge of the material belt;
In the process of attaching the movable plate and the upper substrate, the movable plate is used for carrying out integral pre-pressing on the material belt, the positioning pins can be matched with the positioning holes, the material belt is positioned, and the material belt is prevented from shifting;
when the movable plate is attached to the upper substrate, the upper punch is matched with the lower die base, the corresponding area of the material belt is extruded into the forming gap, and in the moving process, continuous extrusion is carried out on multiple stations, so that the belt material gradually flows and is deformed in a molding way, and a preliminary formed product is obtained.
The lower end of the upper punch vertically arranged is exposed from the lower surface of the upper substrate and is used for being in extrusion contact with the upper surface of the material belt, a plurality of lower die holders corresponding to the upper punch are embedded and arranged on the upper surface of the lower substrate, a vertically arranged insert hole is formed in the upper surface of each lower die holder and is positioned right below the upper punch, the lower end of one insert is embedded into the lower part of the insert hole, a forming gap for extruding the lower part of a material belt is formed between the upper end of the insert and the inner wall of the upper end of the insert hole, and the material belt is continuously extruded and formed in multiple stations through the intermittent movement of the material belt and the matching of a plurality of groups of upper punches and the lower die holders with the insert, and the material belt is subjected to gradual flow and plastic deformation of the material belt material, so that high-efficiency and high-precision processing of precise parts with three-dimensional structure characteristics and small size is realized;
The upper surface of the lower substrate is provided with a plurality of guide holes at two sides of the material belt, the lower end of a guide pin is embedded into the guide holes, the upper end of the guide pin extends upwards from the upper surface of the lower substrate and is provided with a groove embedded by the edge of the material belt, so that the position precision of the material belt in the moving process is improved, the condition that the forming positions of the material belt are inconsistent due to deviation in the moving process among a plurality of forming stations is avoided, and the precision of multi-stage forming processing of parts is ensured;
Furthermore, the lower end of the guide pin capable of moving up and down is embedded into the guide hole and connected with an elastic piece, when the elastic piece is in a natural diastole state, a material belt with the edge embedded into a groove on the guide pin is arranged at intervals with the upper surface of the lower substrate, and the material belt can be lifted through resetting of the elastic piece after each forming operation is finished, so that the material belt is prevented from being partially retained in a forming gap and cannot move to the next station, and the processing precision and efficiency are further ensured;
the two punching male dies are respectively positioned above two edges of the material belt and used for punching to form 2 positioning holes on the material belt, the upper surface of the lower substrate is embedded and provided with a plurality of punching female dies corresponding to the punching male dies, the upper ends of the positioning pins which are embedded into the positioning holes on the material belt are respectively arranged on the upper substrate, the positioning pins matched with the positioning holes on the same side of the material belt are arranged at equal intervals along the advancing direction of the material belt, and the positioning pins are matched with the positioning holes on the material belt, so that the consistency of the advancing distance of the material belt each time can be ensured, the material belt can be positioned at each station before the forming processing, the stress of the material belt is prevented from shifting in the forming process, and the processing precision is further improved;
Further, be provided with a plurality of push rod between its upper base plate and the fly leaf, can follow the upper end embedding of the push rod that vertical direction moved in the second mounting hole on the upper base plate and be connected with the second elastic component of a vertical setting, the lower extreme of push rod and the upper surface extrusion contact of fly leaf, through the reciprocate of fly leaf under the effect of second elastic component, both can be through the flexible protection upper punch of upper punch for the fly leaf, can carry out the pre-compaction of whole face to the material area through the fly leaf again, avoid the skew in material area, further improve just forge and press forming's precision to the material area.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. A progressive die precision cold forging apparatus for precision part (100) processing, comprising: install in lower base plate (2) of base (1) upper surface, install in upper base plate (4) of roof (3) lower surface and install feeding mechanism (200) of material area (5), its characterized in that: the precision part (100) further comprises a body (101) and a hollow column part (102) formed in the center of the lower part of the body (101), the wall thickness of the hollow column part (102) close to one end of the body (101) is larger than that of the other end of the hollow column part, the feeding mechanism (200) is positioned outside the feeding ends of the lower substrate (2) and the upper substrate (4), one end of the material belt (5) is arranged on the feeding mechanism (200), and the other end of the material belt (5) intermittently moves from the feeding ends of the lower substrate (2) and the upper substrate (4) to the discharging ends of the material belt;
The upper substrate (4) is provided with a plurality of upper punches (6) which are arranged at intervals along the advancing direction of the material belt (5), the lower ends of the upper punches (6) which are vertically arranged are exposed from the lower surface of the upper substrate (4) and are used for being in extrusion contact with the upper surface of the material belt (5), the upper surface of the lower substrate (2) is embedded with a plurality of lower die holders (7) which correspond to the upper punches (6), the upper surface of each lower die holder (7) is provided with an insert hole (8) which is vertically arranged and is positioned right below the upper punch (6), the lower end of an insert (9) is embedded into the lower part of the insert hole (8), and a forming gap (10) for extruding the lower part of the material belt (5) is formed between the upper end of the insert (9) and the inner wall of the upper end of the insert hole (8);
The upper surface of the lower substrate (2) is provided with a plurality of guide holes (13) at two sides of the material belt (5), the lower end of a guide pin (11) capable of moving up and down is embedded in the guide holes (13) and is connected with a first elastic piece (14), the upper end of the guide pin (11) extends upwards from the upper surface of the lower substrate (2) and is provided with a groove (12) embedded in the edge of the material belt (5), and when the first elastic piece (14) is in a natural diastole state, the material belt (5) embedded in the upper groove (12) of the guide pin (11) is arranged with the upper surface of the lower substrate (2) at intervals;
2 punching male dies (161) are arranged on the upper substrate (4) and positioned at the rear side of the upper punch (6), 2 punching male dies (161) which are arranged at intervals in the advancing direction of the material belt (5) are respectively positioned above two edges of the material belt (5) and used for punching to form 2 positioning holes (501) on the material belt (5), a plurality of punching female dies (162) corresponding to the punching male dies (161) are embedded and arranged on the upper surface of the lower substrate (2), a plurality of positioning pins (17) which are used for being embedded into the positioning holes (501) on the material belt (5) are respectively arranged on the upper substrate (4), and a plurality of positioning pins (17) matched with the positioning holes (501) on the same side of the material belt (5) are arranged at intervals along the advancing direction of the material belt (5).
2. The progressive die precision cold forging apparatus as recited in claim 1, wherein: the upper substrate (4) below is provided with a fly leaf (18), with last base plate (4) parallel arrangement fly leaf (18) can follow vertical direction and remove for the upper surface of fly leaf (18) is laminated or is kept away from with the lower surface of last base plate (4), be provided with a plurality of push rod (19) between last base plate (4) and fly leaf (18), can follow vertical direction and remove in second mounting hole (401) on last base plate (4) and be connected with second elastic component (20) of a vertical setting in the upper end embedding of push rod (19), the lower extreme of push rod (19) is in extrusion contact with the upper surface of fly leaf (18), when fly leaf (18) are kept away from upper base plate (4), the lower extreme of vertical setting go up in drift (6) is submerged in fly leaf (18), when fly leaf (18) laminating upper base plate (4), second elastic component (20) are in the extrusion state and go out fly leaf (18) and take (5) and go up the extrusion contact with upper surface.
3. The progressive die precision cold forging apparatus as recited in claim 1 or 2, wherein: the base (1) upper surface is opened has mounting hole (15) that corresponds with guiding hole (13), the lower extreme embedding of first elastic component (14) is in this mounting hole (15), the upper end embedding of first elastic component (14) is in guiding hole (13) with mounting hole (15) intercommunication and be connected with the lower extreme of guide pin (11).
4. The progressive die precision cold forging apparatus as recited in claim 3, wherein: the lower substrate (2) further comprises a first lower substrate layer (201) and a second lower substrate layer (202) which are overlapped up and down, and an installation through hole for embedding the lower die holder (7) is formed in the first lower substrate layer (201) positioned on the upper layer.
5. The progressive die precision cold forging apparatus as recited in claim 4, wherein: the first lower substrate layer (201) and the second lower substrate layer (202) are connected through bolts.
6. The progressive die precision cold forging apparatus as recited in claim 1, wherein: a limiting block (22) is detachably arranged at the top of the third mounting hole (301) which penetrates up and down.
7. The progressive die precision cold forging apparatus as recited in claim 6, wherein: the limiting block (22) is connected with the third mounting hole (301) through threads.
8. The progressive die precision cold forging apparatus as recited in claim 1, wherein: the lower end face of the locating pin (17) is lower than the lower end faces of the upper punch (6) and the punching male die (161).
9. The progressive die precision cold forging apparatus as recited in claim 1, wherein: and a clearance hole (23) corresponding to the positioning pin (17) is formed in the upper surface of the lower substrate (2).
10. The progressive die precision cold forging apparatus as recited in claim 1, wherein: the first elastic piece (14) is a spring.
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| CN202210412915.8A CN114951429B (en) | 2022-04-20 | 2022-04-20 | Progressive die precision cold forging device |
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| CN202210412915.8A CN114951429B (en) | 2022-04-20 | 2022-04-20 | Progressive die precision cold forging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551851A (en) * | 2013-10-10 | 2014-02-05 | 湘潭大学 | Method and die for combined forming of parts of metal plate with protrusion structure at bottom |
| CN110180949A (en) * | 2019-06-24 | 2019-08-30 | 唐付君 | Radio frequency connector progressive die cold-extrusion technology |
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| CN111633115B (en) * | 2020-06-05 | 2022-01-28 | 湖南大学 | Die structure of plate resilience experiment capable of realizing switching of various stamping processes |
| CN112642936A (en) * | 2020-12-17 | 2021-04-13 | 东莞市智汇五金有限公司 | Charging box shell machining die and machining method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551851A (en) * | 2013-10-10 | 2014-02-05 | 湘潭大学 | Method and die for combined forming of parts of metal plate with protrusion structure at bottom |
| CN110180949A (en) * | 2019-06-24 | 2019-08-30 | 唐付君 | Radio frequency connector progressive die cold-extrusion technology |
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