CN212121388U

CN212121388U - Punching device

Info

Publication number: CN212121388U
Application number: CN202020685626.1U
Authority: CN
Inventors: 黄攀峰
Original assignee: Heju Precision Electronic Co ltd
Current assignee: Heju Precision Electronic Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-12-11
Anticipated expiration: 2030-04-28

Abstract

The utility model discloses a stamping device, stamping device includes: the outer die comprises a plurality of outer petals, the outer petals surround to form a compression space with an upward opening, and two adjacent outer petals are arranged at intervals; the inner die comprises a plurality of inner split dies arranged above the opening of the compression space, the inner split dies are arranged around the central axis of the inner die in a surrounding manner, and the outer side walls of the inner split dies are spliced to form an outer contour surface; the first driving mechanism is in transmission connection with the outer mold and is used for driving the outer valve molds to contract inwards; and the second driving mechanism is in transmission connection with the inner die and is used for driving the inner petals to descend and driving the inner petals to expand outwards. The technical scheme of the utility model, aim at in the same process, to product punching press and extrusion product lateral wall, carry out crowded light and extrusion plastic to the lateral wall, reduce manufacturing procedure, improve machining efficiency.

Description

Punching device

Technical Field

The utility model relates to a field, in particular to stamping device are made in the punching press.

Background

In the prior art stamping technique, after the stretching process, the product side walls spring back to dent due to the stress spring back of the material. At this time, the side wall of the product needs to be subjected to burnishing or extrusion shaping to eliminate the influence caused by stress rebound, so that the product has smooth inner and outer surfaces. However, in this molding method, a burnishing and finishing process or a shaping process is additionally added after the stamping, which is complicated to process and has low production efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stamping device aims at in same process, to product punching press and extrusion product lateral wall, carries out burnishing or extrusion plastic to the lateral wall, reduces manufacturing procedure, improves machining efficiency.

In order to achieve the above object, the utility model provides a stamping device, stamping device includes:

the outer die comprises a plurality of outer petals, the outer petals surround to form a compression space with an upward opening, and two adjacent outer petals are arranged at intervals;

the inner die comprises a plurality of inner split dies arranged above the opening of the compression space, the inner split dies are arranged around the central axis of the inner die in a surrounding manner, and the outer side walls of the inner split dies are spliced to form an outer contour surface;

the first driving mechanism is in transmission connection with the outer mold and is used for driving the outer valve molds to contract inwards; and

and the second driving mechanism is in transmission connection with the inner die and is used for driving the inner petals to descend and driving the inner petals to expand outwards.

Optionally, each inner petal corresponds to one outer petal setting, and when the inner petal enters the compression space, the outer petal and the outer petal in pair are paired, and the outer side wall of the inner petal and the inner side wall of the outer petal facing the compression space are arranged oppositely.

Optionally, in the pair of the outer flap and the inner flap, an inner side wall of the outer flap facing the compression space is in clearance fit with an outer side wall of the inner flap when the outer flap is contracted to a minimum position.

Optionally, in the paired outer petal and inner petal, a first step is concavely provided on the inner side wall of the outer petal facing the compression space, a second step is convexly provided on the outer side wall of the inner petal, and the second step is inserted into the first step when the outer petal is inwardly contracted.

Optionally, the first driving mechanism includes a plurality of vertically arranged and liftable first guide posts, and each first guide post is correspondingly disposed on one of the outer petals and used for driving the outer petals to move inwards.

Optionally, the outer flap mold further comprises a top surface and an outer side wall deviating from the compression space, and a first inclined surface is connected between the top surface of the outer flap mold and the outer side wall;

the bottom of the first guide post is provided with a first abutting portion, and the first abutting portion abuts against the first inclined surface and slides along the first inclined surface in the descending process of the first guide post so as to push the outer flap mold to move inwards.

Optionally, the inner flap mold further comprises a top surface and an inner side wall, the inner side wall encloses to form an inner hole, and a third inclined surface is connected between the top surface and the inner side wall of the inner flap mold;

the second driving piece comprises a second guide post which is vertically arranged and can be lifted, the bottom of the second guide post is arranged towards the inner hole, and a plurality of second abutting parts which are circumferentially arranged along the second guide post are arranged at the bottom of the second guide post;

the second guide column is lifted relative to the outer valve and provided with a first position and a second position, and when the second guide column is located at the first position, the second guide column is located above the inner hole; when the second guide column is located at the second position, each second abutting part abuts against one third inclined surface and is used for pushing the inner petals to move towards the compression space.

Optionally, the second guiding column further has a third position and a fourth position when the second guiding column is lifted relative to the outer petal, the third position is located below the second position, and the fourth position is located below the third position;

the second abutting part abuts against the third inclined plane in the descending process of the second guide column from the second position to the third position so as to push the inner flap mold to move downwards;

the second butting part slides along the third inclined surface in the descending process of the second guide column from the third position to the fourth position so as to push the inner petal mold to move outwards.

Optionally, a connecting column is convexly arranged on the top surface of the inner mold half.

Optionally, the stamping device further comprises:

the first reset mechanism is in transmission connection with the outer die and is used for driving the outer valve die to reset outwards; and

and the second reset mechanism is in transmission connection with the inner die and is used for driving the inner valve die to reset inwards.

The utility model discloses technical scheme need carry out the product of crowded finish machining or extrusion plastic technology to the product lateral wall after the punching press, when punching press the product, through external mold and centre form extrusion of mutually supporting, to the crowded finish machining or the extrusion plastic technology of product lateral wall simultaneously in same path of manufacturing procedure. Specifically, the outer die of the stamping device is formed by enclosing a plurality of outer petals, the plurality of outer petals form a compression space with an upward opening, and two adjacent outer petals are arranged at intervals; the centre form encloses to close by a plurality of interior lamella moulds and constitutes and locate directly over the compression space, and is a plurality of interior lamella mould winds the central axis of centre form encircles the setting, and is a plurality of the lateral wall concatenation of interior lamella mould forms outer profile surface. Before stamping the product, placing the product to be processed in a compression space; when the product is stamped, the second driving mechanism drives the inner die to vertically press downwards into the compression space, and the product is stamped; after the product is stamped, driving the inner flap mold to move outwards according to a preset stroke, enabling the inner mold to expand and abut against the inner wall of the product, driving the outer flap mold to contract inwards according to the preset stroke by the first driving mechanism, enabling the outer mold to contract and abut against the outer wall of the product, and enabling the inner mold and the outer mold to simultaneously act for extruding the product to polish or extrude and shape the side wall of the product; one set of mould is shaping simultaneously, need not to take out the product and process after the punching press. In the stamping device provided by the technical scheme of the utility model, the inner die is pressed downwards to stamp the product, then the inner die is expanded outwards and the outer die is contracted inwards, and the inner die and the outer die are matched to extrude the side wall of the product in a precise machining or extruding shaping mode, so that the product has a required outline and a smooth outer surface; the stamping and side wall burnishing finish machining or extrusion shaping process is simultaneously carried out in the same set of die and the same process, so that the processing procedures are reduced, and the processing efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of a stamping device according to the present invention;

FIG. 2 is a schematic structural view of an outer die in the stamping apparatus of FIG. 1;

FIG. 3 is a schematic structural view of one of the outer petals in the outer die of FIG. 2;

FIG. 4 is a schematic structural diagram of an inner die of the stamping apparatus of FIG. 1;

FIG. 5 is a schematic structural view of one of the inner petals of the inner die of FIG. 4;

fig. 6 is a schematic view of another angle of the inner petal of fig. 5.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Punching device	212	Connecting column
10	Outer mould	213	Second step
				11	Outer petal mould	22	Inner bore
111	First inclined plane	30	First guide post
				112	First step	31	Second inclined plane
12	Compression space	40	Second guide post
				20	Internal mold	41	Butting edge
21	Inner petal mould	200	Product(s)
				211	Third inclined plane

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a stamping device 100, stamping device 100 includes:

the outer die 10 comprises a plurality of outer petals 11, the outer petals 11 enclose a compression space 12 with an upward opening, and two adjacent outer petals 11 are arranged at intervals;

the inner die 20 comprises a plurality of inner petals 21 arranged above the opening of the compression space 12, the inner petals 21 are arranged around the central axis of the inner die 20 in a surrounding manner, and the outer side walls of the inner petals 21 are spliced to form an outer contour surface;

the first driving mechanism is in transmission connection with the outer die 10 and is used for driving the outer valve dies 11 to contract inwards; and

and the second driving mechanism is in transmission connection with the inner die 20 and is used for driving the inner petals 21 to descend and driving the inner petals 21 to expand outwards.

The technical scheme of the utility model lie in, through control external mold 10 shrink and the expansion of centre form 20, and the vertical pushing down of centre form 20 makes external mold 10 and the relative extrusion product 200 lateral walls of centre form 20 carry out burnishing finish machining or extrusion plastic technology to the lateral wall.

Referring to fig. 2, a plurality of outer petals 11 are arranged at intervals, an outer die 10 formed by surrounding and enclosing has a compression space 12 for accommodating and compressing a product 200 to be processed, and when the side wall of the product is extruded, the outer petals 11 cooperate to enable the outer die 10 to contract relatively. Referring to fig. 4, a plurality of inner petals 21 enclose an inner die 20 of the stamping device 100, the size of the inner die 20 is smaller than the compression space 12, and the inner die 20 is located right above the compression space 12; when the side wall of the product is extruded, the inner petals 21 move outwards synchronously in cooperation, so that the inner dies 20 expand. With further reference to fig. 1, the inner mold 20 is positioned directly above the compression space 12 and can be pressed vertically downward relative to the outer mold 10 into the compression space 12. When the product 200 to be processed is formed by stamping, the product 200 to be processed is accommodated in the compression space 12, the inner die 20 descends into the compression space 12, and the product 200 to be processed is stamped. And then, the inner petals 21 move outwards to abut against the inner wall surface of the product 200 to be processed, the outer petals 11 move inwards to abut against the outer wall surface of the product 200 to be processed, the inner die 20 and the outer die 10 expand outwards and contract inwards according to a preset stroke to extrude the product 200 to be processed, and then the side wall of the product 200 is subjected to burnishing finish machining or extrusion shaping.

In some embodiments of the present invention, the stamping device 100 includes a first driving mechanism and a second driving mechanism, the first driving mechanism is used to drive the outer petals 11 to contract; the second driving mechanism is used for driving the inner die 20 to vertically press down relative to the outer die 10 into the compression space 12 to punch the product 200, and driving the inner petal 21 to expand. Specifically, the second driving mechanism drives the inner petals 21 to act cooperatively, vertically and downwardly move into the compression space 12, and then move outward along the outer petals 11 according to a preset stroke direction, so that the outer side wall of each inner petal 21 abuts against the inner wall of the product 200 to be processed, and the inner wall of the product 200 to be processed is supported so that the position to be formed is not excessively deformed. Then, the first driving mechanism drives the outer petals 11 to cooperatively act, and the outer petals 11 move inwards towards the compression space 12 according to a preset stroke, so that the compression space 12 is reduced, and the outer petals 11 respectively extrude the outer side walls of the product 200 to be processed in different directions, so that the side walls of the product 200 in all directions are pressed. The first driving mechanism and the second driving mechanism can use an air cylinder, a hydraulic cylinder or a motor and the like as driving pieces, and only need to provide the driving force for the inward movement of the outer die 10, and provide the driving force for the outward movement and the driving of the vertical pressing of the inner petal die 21 respectively for the inner die 20.

In some embodiments of the present invention, the second driving mechanism drives the inner mold 20 to expand outwardly and the first driving mechanism drives the outer mold 10 to contract inwardly. Specifically, when the product 200 to be processed is stamped, the second driving mechanism drives the inner mold 20 to press down into the compression space 12, the product 200 to be processed is stamped to form a side wall, and the product 200 is clamped in a gap between the outer mold 10 and the inner mold 20. The first driving mechanism and the second driving mechanism are driven synchronously, so that the inner die 20 expands outwards to abut against the inner wall of the product 200 to be processed, the inner die 20 provides an outwards extrusion supporting force, the outer die 10 contracts inwards to abut against the inner wall of the product 200 to be processed, and an inwards contracted and deformed extrusion force is provided, and because the outer contour of the compression space 12 and the outer contour of the inner die 20 are the same as the contour of the molded product 200, the inner die 20 and the outer die 10 synchronously extrude the side wall of the product 200.

The utility model discloses technical scheme need carry out the product 200 of crowded finish machining or extrusion plastic to product 200 lateral wall after the punching press, when punching press to product 200, mutually support the extrusion through external mold 10 and centre form 20, to product 200 lateral wall crowded finish machining or extrusion plastic simultaneously in same path of manufacturing procedure. Specifically, the outer die 10 of the stamping device 100 is formed by enclosing a plurality of outer petals 11, the plurality of outer petals 11 enclose a compression space 12 with an upward opening, and two adjacent outer petals 11 are arranged at intervals; centre form 20 is enclosed to close by a plurality of interior lamella moulds 21 and constitutes and locate compression space 12 directly over, and is a plurality of interior lamella mould 21 winds the central axis of centre form 20 encircles the setting, and is a plurality of the lateral wall concatenation of interior lamella mould 21 forms outer profile surface. Before stamping the product 200, placing the product 200 to be processed in the compression space 12; when the product 200 is punched, the second driving mechanism drives the inner die 20 to vertically press downwards into the compression space 12, so as to punch the product 200; after the product 200 is stamped, the inner split mold 21 is driven to move outwards according to a preset stroke, so that the inner mold 20 is expanded to abut against the inner wall of the product 200, the first driving mechanism drives the outer split mold 11 to contract inwards according to a preset stroke, so that the outer mold 10 contracts to abut against the outer wall of the product 200, the inner mold 20 and the outer mold 10 simultaneously act to extrude the product 200, and the side wall of the product 200 is subjected to burnishing finish machining or extrusion shaping; one set of die is formed simultaneously, and the product 200 does not need to be taken out after stamping and then processed. In the stamping device 100 provided in the technical solution of the present invention, the inner mold 20 is pressed downwards to stamp the product 200, then the inner mold 20 is expanded outwards and the outer mold 10 is contracted inwards, and the inner mold 20 and the outer mold 10 are used to cooperate with each other to extrude the side wall of the product 200, so that the product 200 has a required contour and a smooth outer surface; the same die is used for simultaneously carrying out stamping and side wall burnishing finish machining or extrusion shaping in the same process, so that the processing procedures are reduced, and the processing efficiency is improved.

Referring to fig. 1, in some embodiments of the present invention, each of the inner petals 21 corresponds to one of the outer petals 11. Specifically, when the stamping device 100 stamps the product 200, and the inner petal 21 enters the compression space 12, the inner petal expands outwards to abut against the inner wall of the product 200 to be processed, so as to provide an outward extrusion force, and the outer petal 11 contracts inwards to abut against the outer wall of the product 200 to be processed, so as to provide an inward extrusion force. The lateral wall of interior lamella mould 21 with the inside wall of outer lamella mould 11 sets up relatively for when crowded finish machining or extrusion plastic technology to the lateral wall, the lateral wall of treating processing product 200 receives inside and outside extrusion force simultaneously, guarantees the finish machining precision, avoids interior extrusion force and outer extrusion pressure crisscross, makes the lateral wall extrusion asynchronous, leads to the shaping dislocation to cause sunkenly.

With further reference to fig. 1, in some embodiments of the present invention, the inner petals 21 and the outer petals 11 are provided in pairs, and the orientation of the outer petals 11 is such that the inner side wall of the compression space 12 is in clearance fit with the outer side wall of the inner petals 21 when the outer petals 11 are contracted to the minimum position. Specifically, the inner petal 21 expands outwards to abut against the inner wall of the product 200 to be processed, and the outer petal 11 at the position corresponding to the inner petal 21 contracts inwards to abut against the outer wall at the same position of the product 200 to be processed; the outer side wall of the inner flap mold 21 and the inner side wall of the outer flap mold 11 have the same outer contour, so that when the outer mold 10 contracts to the minimum, the positions of the inner side wall of the compression space 12 and the side wall of a product extruded by the outer side wall of the inner flap mold 21, which are faced by the outer flap mold 11, in the paired outer flap mold 11 and inner flap mold 21 are completely consistent, the contour of the side wall of the product 200 to be processed extruded by the outer flap mold 11 and the inner flap mold 21 is the same as the outer contour of the inner flap mold 21 and the outer flap mold 11, and the molding precision of the side wall processing is ensured.

It should be noted that, in some embodiments of the present invention, the number of the outer petals 11 and the inner petals 21 may not be one-to-one, but when the outer petals 10 are contracted to the minimum, the outer contour surface of the expanded inner die 20 formed by the inner petals 21 and the inner contour surface of the contracted outer petals 11 enclosing the resultant compression space 12 are arranged oppositely, and the contours are the same.

Referring to fig. 3 and 6, in some embodiments of the present invention, in the paired outer flap 11 and inner flap 21, a first step 112 is concavely disposed on the inner sidewall of the outer flap 11 facing the compression space 12, a second step 213 is convexly disposed on the outer sidewall of the inner flap 21, and the second step 213 is inserted into the first step 112 when the outer flap 11 is inwardly contracted. Specifically, need form the less throat of bore at the inner wall of product 200 after the punching press to partial product 200, the technical scheme of the utility model, the concave first step 112 that is equipped with of inside wall of outer lamella mould 11 the protruding second step 213 that is equipped with of outside wall of interior lamella mould 21 works as when interior lamella mould 21 punching press product 200 forms product 200 lateral wall, interior lamella mould 21 outwards expands, second step 213 butt the inner wall of product 200, the inside extrusion of outer lamella mould 11, the inside wall butt of outer lamella mould 11 the outer wall of product 200, outer lamella mould 11 continues the extrusion, makes second step 213 insert and locates first step 112, the lateral wall pressurized formation throat of product 200. The technical scheme of the utility model, when forming the throat of product 200, the inner wall of product 200 receives second step 213 supports, and the inner wall of product 200 can not because of the shaping of throat is out of shape along with it. Compared to the exemplary technique, the sidewall of the necking down perimeter of the product 200 does not undergo transient deformation, and the shape profile of the product 200 is controllable, thereby controlling the forming accuracy of the product 200.

It will be appreciated that after retraction of the inner flap 21, the outer profile of the inner mold 20 should be smaller than the inner profile of the throat of the product 200 to enable the inner flap 21 to be removed from the product 200.

Referring to fig. 1, in some embodiments of the present invention, the first driving mechanism includes a plurality of vertically disposed first guiding pillars 30, each of the first guiding pillars 30 is correspondingly disposed above one of the outer petals 11 and can be lifted along a vertical direction to drive the outer petals 11 to move inward. Specifically, outer petal 11 encloses to close and forms outer mould 10, outer petal 11 encircles the setting according to the required fashioned product 200 shape, first guide post 30 is located outer petal 11 top when first guide post 30 is vertical descends, first guide post 30 with outer petal 11 transmission is connected, transmission connected mode such as link mechanism, cam drive mechanism etc. produces inside thrust to outer petal 11, outer petal 11 is in the thrust effect of first guide post 30, inwards moves, first guide post 30 is provided with a plurality ofly, and each first guide post 30 drive one outer petal 11 inwards moves. It should be noted that the first driving mechanism further includes a driving member such as a motor and a cylinder, and the driving member is in transmission connection with the first guiding column 30 to push the first guiding column 30 to press down. And a plurality of the first guide posts 30 may be connected to the same driver so that the outer petals 11 are contracted simultaneously.

Referring to fig. 2, in some embodiments of the present invention, the outer flap 11 includes a top surface, an inner sidewall forming the inner wall of the compression space 12 and an outer sidewall deviating from the compression space 12, and a first inclined plane 111 is transited between the bottom of the outer flap 11 and the outer sidewall. With further reference to fig. 2, the inner sidewall surrounds the inner wall forming the compression space 12, when the necking is performed, the position of the product 200 to be processed, which needs to be formed, is accommodated in the compression space 12, each outer flap 11 is inwardly shrunk, the inner sidewalls are close to each other, so that the compression space 12 is narrowed, since the shape of each outer flap 11 is not changed, the profile of the compression space 12 is not changed, and the inner sidewalls of the outer flaps 11 abut against the outer wall surface of the product 200 to be processed. Thereby causing the position to be formed to press the side wall of the product 200 as the compression space 12 is reduced.

Referring to fig. 1, the first abutting portion abuts against the first inclined surface 111 along with the descending process of the first guide post 30. Specifically, the outer flap mold 11 is fixed to the machining platform and only slides relatively on the installation surface of the machining platform. The first guide pillar 30 is disposed above the first inclined plane 111 of the outer petal 11; when the product 200 to be processed is subjected to a burnishing finish machining or an extrusion shaping process, the first guide column 30 is vertically pressed downwards, and when the first abutting portion is lowered to abut against the first inclined surface 111, under the driving force of the first driving mechanism, the first abutting portion and the first inclined surface 111 slide relatively to generate a friction force, so that the outer valve mold 11 is driven to move inwards, and the compression space 12 is contracted.

Referring to fig. 2, in some embodiments of the present invention, a second inclined surface 31 is disposed on the first abutting portion and is matched with the first inclined surface 111. Specifically, before the workpiece is machined, the first guide post 30 is located above the first inclined surface 111; when the burnishing finish machining or the extrusion shaping process is performed, the first driving mechanism drives the first guide post 30 to vertically descend, the second inclined surface 31 is attached to the first inclined surface 111, then the first guide post 30 is continuously pressed downwards, so that the second inclined surface 31 and the first inclined surface 111 slide relatively, the outer petal 11 is driven to move inwards, and the compression space 12 is contracted. It should be understood that the shape of the abutting portion is not limited to the illustrated abutting form of the second inclined surface 31, and the second abutting portion may use an edge, an arc surface, etc. and may abut against and slide relative to the first inclined surface 111.

Referring to fig. 4 and 5, in some embodiments of the present invention, the inner mold 21 includes a top surface and an outer sidewall forming an outer contour of the inner mold 20, and an inner sidewall deviating from the outer mold 11, the inner sidewall surrounds and encloses to form an inner hole 22, and a third inclined surface 211 is connected between the top surface and the inner sidewall of the inner mold 21. Specifically, the inner side wall of the inner flap 21 encloses to form the inner wall surface of the inner hole 22, and the outer side wall of the inner flap 21 is combined in a surrounding manner according to the shape of the product 200 to be molded to form the outer wall surface of the inner mold 20. Further, a third inclined surface 211 is transited between the top surface and the inner side wall of the inner flap 21, and the third inclined surface 211 encloses to make the upward opening of the inner hole 22 be an outward-expanding bell mouth.

With further reference to fig. 1, in some embodiments of the present invention, the second driving member includes a vertically disposed, liftable second guiding pillar 40, a bottom of the second guiding pillar 40 faces the inner hole 22, and a plurality of second supporting portions are disposed at a bottom of the second guiding pillar 40 along a circumferential direction of the second guiding pillar 40. The second guide post 40 is defined to have a first position and a second position relative to the outer petals 11. Specifically, when the second guiding column 40 is in the first position, the second guiding column 40 is located above the inner hole 22; the second guiding column 40 descends vertically, and when the second abutting part abuts against the third inclined plane 211, the second guiding column 40 is at a second position; the second guiding columns 40 continue to descend from the second position, each second abutting portion of the second guiding columns 40 abuts against the third inclined surface 211, so that the second guiding columns 40 abut against the bell mouths, static friction is generated between the second abutting portions and the third inclined surfaces 211, the second abutting portions and the third inclined surfaces 211 are relatively fixed, and under the action of driving force of a second driving mechanism, the second abutting portions move downwards to drive the inner petal molds 21 to be pressed into the compression space 12 to stamp the products 200. It should be noted that the second driving mechanism further includes a driving member such as a motor and an air cylinder, and the driving member is in transmission connection with the second guiding column 40 to push the second guiding column 40 to press down.

In some embodiments, the second driving mechanism further includes an outward expanding mechanism, after the second guiding column 40 drives the inner petal 21 to be pressed into the compression space 12, the outward expanding mechanism uses, for example, an air cylinder, a motor, or the like as a driving member, the driving member is provided with a push rod, the push rod is in transmission connection or abutting connection with the inner petal 21, and drives the inner petal 21 to move outward in the compression space 12.

In some embodiments of the present invention, the second guiding column 40 has a third position and a fourth position relative to the outer flap 11, the third position is located below the second position, and the fourth position is located below the third position. Specifically, the second abutting portion abuts against the third inclined surface 211 in a descending process of the second guide column 40 from the second position to the third position to push the inner flap 21 to move downward, when the second guide column 40 drives the inner flap 21 to descend into the compression space 12, the second guide column 40 is located at the third position, and the bottom surface of the inner flap 21 abuts against the product 200 to be processed to stamp the product 200 to be processed. Then, since the bottom surface of the inner flap 21 abuts against the product 200 to be processed, the inner flap 21 stops descending. The second abutting portion slides along the third inclined surface 211 in a descending process of the second guide column 40 from the third position to the fourth position to push the inner flap 21 to move outward, the second abutting portion and the third inclined surface 211 slide relatively to generate a sliding friction force, so that the inner flap 21 expands outward, and when the outer side wall of the inner flap 21 abuts against the inner wall of the product 200 to be processed to generate an outward extrusion force on the inner wall of the product 200 to be processed, the second guide column 40 is located at the fourth position. The second guide post 40 descends stage by stage under the action of the driving force of the second driving mechanism, drives the inner petal 21 to be pressed downwards to enter the compression space 12 for stamping, and further drives the inner petal 21 to expand outwards to extrude the inner wall of the product 200 to be processed.

It should be noted that, as shown in fig. 1, in the embodiment of the present invention, the second guiding column 40 is a polygonal prism, the bottom surface of the second guiding column 40 faces the inner hole 22, and each edge of the bottom surface of the second abutting portion forms an abutting edge 41, which abuts against the third inclined surface 211 of each inner petal 21. Alternatively, the bottom surface and the outer side wall of the second abutting portion are transited to form a fourth inclined surface (not shown in the figure), the fourth inclined surface abuts against the third inclined surface 211, and the same technical effect as that of the abutting edge 41 can be obtained, and the second abutting portion has various implementation structures, which is not described herein again.

It should be further noted that, in the embodiment shown in fig. 1, a plurality of second abutting portions are circumferentially disposed on one of the second guide posts 40; certainly, the second driving mechanism may be provided with a plurality of second guiding pillars 40, each of the second guiding portions is provided with a second abutting portion to abut against the third inclined surface 211, each of the second guiding pillars 40 drives one of the inner petals 21, and the plurality of second guiding pillars 40 are driven synchronously, so that the inner petals 21 are lowered synchronously and expanded outwards.

Referring to fig. 5, in some embodiments of the present invention, a connecting column 212 is protruded from the top surface of the inner flap 21, and is used to fix the inner flap 21, and in some embodiments, the connecting column can also guide the inner flap 21. Specifically, in some embodiments, a guide groove is formed on the mounting platform of the inner flap 21, the connecting column 212 is inserted into the guide groove, the inner flap 21 can expand outward along the guide groove, the second driving mechanism drives the second abutting portion to press down, so that the inner mold 20 enters the compression space 12, the bottom surface of the inner flap 21 abuts against the product 200 to be processed, the second driving mechanism further drives the second abutting portion to press down, the abutting edge 41 and the third inclined surface 211 slide relatively, a sliding friction force is generated, the inner flap 21 expands outward along the guide groove, the outer side wall of the inner flap 21 abuts against the inner wall of the product 200 to be processed, and an outward extrusion force is generated on the inner wall of the product 200 to be processed; meanwhile, the first abutting portion is pressed downwards, the second inclined surface 31 and the first inclined surface 111 slide relatively to generate sliding friction force, the outer die 10 is driven to contract inwards, the inner side wall of the outer die 10 extrudes the outer wall of the product 200 to be processed, and then the product 200 is subjected to polishing and finish machining or shaping.

It should be noted that, in some embodiments of the present invention, the first guiding column 30 and the second guiding column 40 are in transmission connection with the same driving mechanism, the first guiding column 30 and the second guiding column 40 are pressed simultaneously, the second guiding column 40 drives the inner mold 20 to enter the compression space 12, when the inner mold 20 begins to expand, the first abutting portion and the first inclined plane 111 abut against each other and slide relatively, so as to control the contraction of the outer mold 10 and the expansion of the inner mold 20 to be performed synchronously.

In some embodiments of the present invention, the stamping device 100 further comprises a first reset mechanism and a second reset mechanism. After the necking forming, the first reset mechanism is in transmission connection with the outer valve mold 11 to drive the outer mold 10 to reset outwards, and the second reset mechanism is in transmission connection with the inner valve mold 21 to reset the inner mold 20 inwards. Specifically, the first and second reset mechanisms may be provided with a pushing mechanism, such as an air cylinder, a hydraulic cylinder, or a motor, on the stamping device 100, and the pushing mechanism drives the outer mold 10 and the inner mold 20 to reset after the forming process; or elastic components with elastic force capable of automatically returning, such as return springs, are connected to the outer flap mold 11 and the inner flap mold 21, and the elastic components automatically return after the extrusion of the side wall is completed; or a magnetic attraction and other resetting modes are adopted. The specific implementation mode of the resetting mechanism is not specifically limited, and only the pushing force for outward movement of the outer split mold 11 and inward movement of the inner split mold 21 is needed to be provided after the part is formed, so that accurate resetting after machining is ensured, the phenomenon that the side wall extrusion forming outlines of the products 200 are inconsistent by the outer mold 10 and the inner mold 20 when next machining is carried out is avoided, and further, the forming consistency of the products 200 is ensured and the machining precision is controlled during batch production.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stamping device, characterized in that the stamping device comprises:

2. The stamping device as claimed in claim 1, wherein each of the inner petals is disposed corresponding to one of the outer petals, and when the inner petals enter the compression space, the outer petals and the outer petals in the pair are disposed such that the outer side walls of the inner petals and the inner side walls of the outer petals facing the compression space are opposite to each other.

3. The stamping device of claim 2, wherein, of the outer and inner petals in the pair, an inner sidewall of the outer petal facing the compression space is in clearance fit with an outer sidewall of the inner petal when the outer petal is retracted to a minimum position.

4. The punching apparatus as set forth in claim 3, wherein, in the pair of the outer and inner petals, an inner side wall of the outer petal facing the compression space is concavely provided with a first step, and an outer side wall of the inner petal is convexly provided with a second step, and the second step is inserted into the first step when the outer petal is inwardly contracted.

5. The stamping device as claimed in claim 1, wherein the first driving mechanism includes a plurality of vertically disposed and liftable first guide posts, and each of the first guide posts is disposed above one of the outer petals and configured to drive the outer petals to move inward.

6. The stamping apparatus of claim 5, wherein the outer petals further include a top surface and an outer sidewall facing away from the compression space, the top surface and the outer sidewall of the outer petals having a first ramp surface connected therebetween;

7. The stamping device of claim 1, wherein the inner petals further include a top surface and an inner sidewall that encloses a bore, the top surface and the inner sidewall of the inner petals having a third ramp surface connected therebetween;

8. The stamping apparatus of claim 7, wherein the second guide post is raised and lowered relative to the outer petals and has a third position and a fourth position, the third position being below the second position and the fourth position being below the third position;

9. The stamping apparatus of claim 7, wherein the inner petals are convexly formed with attachment posts on their top surfaces.

10. The stamping apparatus of any one of claims 1 to 9, further comprising: