CN212884472U - Blanking and deep drawing composite die - Google Patents

Abstract

A blanking deep drawing composite die comprises a lower die and an upper die movably arranged above the lower die; the lower die comprises a lower die base, a female die, a male die and a deep drawing blank holder; the upper die comprises an upper die base, a concave-convex die, a blanking blank holder, a knockout rod, a pushing block and an adjusting screw rod. In the process of drawing parts by the blanking and drawing composite die, a gap with constant width can be formed between the lower surface of the concave-convex die and the upper surface of the first cylinder of the drawing blank holder, so that the deformation space of the parts in the drawing process is limited, the deformation of the parts is limited within the allowable range of the gap in the forming process, the drawing blank holder can be extruded when the parts are deformed, the extrusion force is generated on the drawing blank holder, meanwhile, the drawing blank holder can generate blank holding force with equal size and opposite direction on the parts, the synchronous change of the blank holding force along with the deformation of the parts is realized, and the problem that the blank holding force cannot be adjusted in a self-adaptive manner in the existing drawing process is solved.

Description

Blanking and deep drawing composite die

Technical Field

The utility model relates to a forming die technical field, concretely relates to blanking deep-drawing compound mould.

Background

The blanking deep drawing processing is a technological method for stamping a plane blank into a cup-shaped part through a die, the circumference of the outer edge of the part is greatly reduced in the process of changing the part blank into the cup-shaped part from a flat plate, and if the thickness direction of the part is not limited in the reducing process, the material of the outer edge area of the part can generate wrinkles due to instability, so that the processing of the part can not be carried out finally. In order to avoid the wrinkles generated by the instability of the part material, the current practice is to apply a certain pre-pressure in the thickness direction of the part to limit the wrinkles generated by the material. However, how to reasonably select the magnitude of the pre-pressure is a difficult problem, and is influenced by a plurality of factors such as the material, the geometric shape, the surface state and the lubricating effect of the plane blank, the geometric parameters and the surface roughness of the die, the drawing coefficient of the material, the change of the physical properties of the material caused by cold hardening in the drawing process and the like, wherein most of the influencing factors are dynamically changed, so that the reasonable blank pressing force (namely the pre-pressure in the foregoing) is not a constant value in the implementation process of the drawing process. In the aspect of the mold structure, the blank holder force is generally provided by a spring or rubber, the blank holder force provided by the spring or the rubber can only be changed within a small range, the blank holder force can not be adjusted to a reasonable size in a drawing process in a self-adaptive manner, and whether the blank holder force is selected reasonably or not directly influences the quality of drawn parts. If the edge pressing force is too large, the bent part of the part becomes thin, and the part falls off (the cup-shaped bottom of the part is cracked) when the edge pressing force exceeds the limit. If the edge pressing force is small, wrinkles are remained on the outer edge of the part.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a blanking deep-drawing compound mould that blank pressing power can warp the synchro-variation along with the part is provided, its self-adaptation that can realize part deep-drawing process blank pressing power is adjusted.

In order to solve the technical problem, the technical scheme adopted by the utility model is to provide a blanking deep drawing composite die, which comprises a lower die and an upper die movably arranged above the lower die; wherein,

the lower die comprises a lower die base, a female die, a male die and a deep drawing blank holder; the female die is provided with a hollow cylinder and a top wall connected with the upper end of the cylinder, the lower end of the cylinder is connected to the upper side of the lower die holder, and the top wall is provided with a first through hole and a second through hole; the lower end of the male die is connected to the upper side of the lower die holder, is positioned in the barrel and is aligned to the first through hole; the drawing blank holder is slidably sleeved on the outer side of the male die, the lower end of the drawing blank holder is elastically supported on the lower die seat, the drawing blank holder comprises a first cylinder and a second cylinder connected to the lower end of the first cylinder, the outer diameter of the second cylinder is larger than that of the first cylinder, and the outer diameter of the first cylinder is matched with the inner diameter of the first through hole;

the upper die comprises an upper die base, a concave-convex die, a blanking blank holder, a knockout rod, a pushing block and an adjusting screw rod; the male die and the female die are connected to the lower side of the upper die base, a cavity which is vertically communicated and aligned with the male die is formed in the middle of the male die and the female die, the inner diameter of the cavity is larger than the outer diameter of the male die, and a third cylinder with the outer diameter identical to that of the first cylinder of the drawing blank holder is formed in the lower portion of the male die and the female die; the blanking blank holder is slidably sleeved on the outer side of the third cylinder and is elastically connected with the upper die base, and a third through hole aligned with the second through hole is formed in the blanking blank holder; the push piece block is movably inserted into the cavity, and the upper end of the push piece block is elastically connected with the upper die base; the knockout rod is movably inserted into the upper die base, and the lower end of the knockout rod penetrates through the upper die base and is connected to the pushing piece block; the upper end of the adjusting screw is in threaded connection with the upper die base, and the lower end of the adjusting screw extends into the cylinder from the second through hole and the third through hole and is aligned with the second cylinder;

when the upper die moves downwards to enable the lower end of the adjusting screw to contact the second cylinder, a gap exists between the lower surface of the concave-convex die and the upper surface of the first cylinder of the drawing blank holder.

By adopting the blanking and drawing composite die in the technical scheme, the deformation space of the part in the drawing process is well limited by the gap between the lower surface of the concave-convex die and the upper surface of the first cylinder of the drawing blank holder. In the early stage of drawing, the deformation degree of the part is within the allowable range of the gap, and the part does not interact with a concave-convex die and a drawing blank holder and bear crease-resistance pre-pressure; in the forming process, the die moves downwards, part deformation produces the trend of piling up, the clearance width between unsmooth mould and the deep-drawing blank holder remains unchanged, therefore the clearance can prevent the part from excessively piling up, part deformation is restricted in clearance allowed band, part deformation extrusion deep-drawing blank holder, when producing the extrusion force to the deep-drawing blank holder, according to power of action and reaction force principle, the deep-drawing blank holder can produce the blank holder power that the size equals, opposite direction to the part, further go on along with the deep-drawing, the material walking with pile up the trend aggravation, the part is to the extrusion force increase of deep-drawing blank holder, the blank holder power that the deep-drawing blank holder acted on the part also increases thereupon. Therefore, the blank holder force is synchronously changed along with the deformation of the part, and the problem that the blank holder force cannot be adjusted in a self-adaptive manner in the conventional deep drawing process is solved.

The utility model provides an among the blanking deep-drawing compound mould, the lower mould still includes the cushion, the cushion slip cap is located the outside of terrace die and lower extreme support in the die holder, the lower extreme of the second cylinder of deep-drawing blank holder support in the cushion.

In the blanking and drawing composite die provided by the utility model, the upper die further comprises a first connecting rod and a first spring, the first connecting rod is inserted in the upper die base in a sliding manner, and the lower end of the first connecting rod penetrates out of the upper die base and is connected with the blanking blank holder; the first spring is sleeved on the first connecting rod, and the upper end and the lower end of the first spring respectively elastically abut against the upper die base and the blanking blank holder.

In the blanking and drawing composite die provided by the utility model, the upper die base is provided with a first step hole which is communicated up and down, and the first step hole comprises a first upper section hole with larger inner diameter and a first lower section hole with smaller inner diameter; the first connecting rod comprises a rod part and a head part connected to the upper end of the rod part, and the rod part is connected with the blanking blank holder; the first upper section hole allows the rod part and the head part to pass through; the first lower section aperture allows the shank to pass through and does not allow the head to pass through.

In the blanking and drawing composite die provided by the utility model, the upper die base is provided with a second step hole which is communicated up and down, and the second step hole comprises a second upper section hole with smaller inner diameter and a second lower section hole with larger diameter; the male and female die comprises a fourth cylinder connected to the upper end of the third cylinder, the outer diameter of the fourth cylinder is larger than that of the third cylinder, the inner diameter of the second lower section hole is matched with that of the fourth cylinder, and the fourth cylinder is inserted into the second lower section hole.

In the blanking and drawing composite die provided by the utility model, the lower surface of the fourth cylinder is flush with the lower surface of the upper die base; the upper die further comprises a first pressing ring which is sleeved on the outer side of the third cylinder and fixedly connected with the upper die base, and the upper surface of the first pressing ring supports against the fourth cylinder and the lower surface of the upper die base respectively. Therefore, the male die and the female die are more stably arranged on the lower side of the upper die base, and the stability of the structure and the performance of the blanking and drawing composite die is ensured.

In the blanking and drawing composite die provided by the utility model, the first pressing ring is provided with a first avoidance hole which is communicated up and down, the first avoidance hole is aligned with the first step hole, and the lower end of the first connecting rod sequentially passes through the first step hole and the first avoidance hole from top to bottom; the upper end of the first spring is inserted into the first avoidance hole.

In the blanking deep-drawing composite die provided by the utility model, the first pressing ring is provided with a second avoiding hole which is communicated up and down, and the second avoiding hole is aligned with the third through hole; the upper end of the adjusting screw rod penetrates through the second avoidance hole and then extends into the upper die base to be in threaded connection with the upper die base; the upper die further comprises a compression nut, the compression nut is sleeved on the upper portion of the adjusting screw rod and is in threaded connection with the adjusting screw rod, and the upper surface of the compression nut tightly pushes against the lower side of the first compression ring.

The utility model provides an among the blanking deep-drawing compound die, go up the mould and still include the second spring, the second spring housing is located the knockout pole, just the upper and lower both ends of second spring elasticity respectively support and hold the upper die base with push away a piece.

In the blanking deep-drawing composite die provided by the utility model, the male die comprises a chassis with larger outer diameter and a stamping rod with smaller outer diameter; the lower die further comprises a second pressing ring which is sleeved on the outer side of the male die and is fixedly connected with the lower die base, the second pressing ring is provided with a third stepped hole which is communicated up and down, the third stepped hole comprises a third upper-section hole with a smaller inner diameter and a third lower-section hole with a larger inner diameter, a chassis of the male die is accommodated in the third lower-section hole, and a stamping rod of the male die penetrates out of the third upper-section hole upwards; the step surface connecting the third upper section hole and the third lower section hole is pressed on the upper surface of the chassis; the elastic pad is slidably sleeved on the outer side of the stamping rod and supported on the upper surface of the second pressing ring. Therefore, the male die is more stably arranged on the lower die seat, and the stability of the structure and the performance of the blanking and drawing composite die is ensured.

Implement the utility model provides a compound mould of blanking deep-drawing can reach following beneficial effect at least: in the process of drawing a part by the blanking and drawing composite die, a gap with the width kept unchanged can be formed between the lower surface of the concave-convex die and the upper surface of the first cylinder of the drawing blank holder, so that the deformation space of the part in the drawing process is limited, the deformation of the part is limited within the allowable range of the gap in the forming process, the drawing blank holder can be extruded when the part is deformed, the extrusion force is generated on the drawing blank holder, meanwhile, the drawing blank holder can generate the blank holding force with the same size and opposite direction on the part, the synchronous change of the blank holding force along with the deformation of the part is realized, and the problem that the blank holding force cannot be adjusted in a self-adaptive manner in the existing drawing process is solved.

Drawings

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

fig. 1 is a schematic structural view of a blanking and drawing composite die provided by the utility model;

FIG. 2 is a first enlarged fragmentary view of FIG. 1;

FIG. 3 is a second enlarged partial view of FIG. 1;

fig. 4 is a bottom view of the upper die base of the blanking and drawing composite die provided by the utility model.

The reference numerals in the detailed description illustrate:

lower die holder	11	Concave die	12
				Male die	13	Deep drawing blank holder	14
Elastic cushion	15	Second pressing ring	16
				Chassis	131	Stamping rod	132
Die handle	20	Upper die holder	21
				Concave-convex die	22	Blank pressing ring	23
Knockout rod	24	Push block	25
				Adjusting screw	26	First pressing ring	27
Compression nut	281	Gasket	282
				First connecting rod	291	First spring	292
Second spring	293	First step hole	211
				First upper section hole	2111	First lower section hole	2112
Rod part	2912	Head part	2911
				First avoidance hole	271	Hollow cavity	221
Gap	300	Second avoiding hole	272
				A first column body	141	Second post body	142
Third column	222	Fourth column	223
				Second through hole	121	Third through hole	231
Second stepped hole	212	Mounting hole	213
				Blank piece	400

Detailed Description

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the specific features in the embodiments and examples are detailed descriptions of the technical solutions of the present application, but not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present invention may be combined with each other without conflict.

The embodiment provides a blanking and deep drawing composite die. Referring to fig. 1 to 3, the blanking and drawing composite die includes a lower die and an upper die movably disposed above the lower die.

In this embodiment, the lower die includes a lower die holder 11, a female die 12, a male die 13 and a drawing blank holder 14; the female die 12 is provided with a hollow cylinder and a top wall connected with the upper end of the cylinder, the lower end of the cylinder is connected to the upper side of the lower die holder 11, and the top wall is provided with a first through hole and a second through hole 121; the lower end of the male die 13 is connected to the upper side of the lower die holder 11, is positioned in the cylinder and is aligned with the first through hole; the drawing blank holder 14 is slidably sleeved outside the male die 13, the lower end of the drawing blank holder is elastically supported on the lower die holder 11, the drawing blank holder 14 comprises a first cylinder 141 and a second cylinder 142 connected to the lower end of the first cylinder 141, the outer diameter of the second cylinder 142 is larger than that of the first cylinder 141, and the outer diameter of the first cylinder 141 is matched with the inner diameter of the first through hole so that the first cylinder 141 can be just inserted into the first through hole. The upper die comprises an upper die base 21, a concave-convex die 22, a blanking blank holder 23, a knockout rod 24, a piece pushing block 25 and an adjusting screw rod 26; the male and female die 22 is connected to the lower side of the upper die holder 21, a cavity 221 which is vertically penetrated and aligned with the male die 13 is formed in the middle of the male and female die 22, the inner diameter of the cavity 221 is larger than the outer diameter of the male die 13, and a third cylinder 222 with the outer diameter identical to that of the first cylinder 141 of the drawing and blank holder 14 is formed in the lower part of the male and female die 22; the blanking blank holder 23 is slidably sleeved outside the third cylinder 222 and elastically connected to the upper die holder 21, and a third through hole 231 aligned with the second through hole 121 is formed in the blanking blank holder 23; the pushing piece block 25 is movably inserted into the cavity 221, and the upper end of the pushing piece block is elastically connected with the upper die holder 21; the knockout pin 24 is movably inserted into the upper die holder 21, and the lower end of the knockout pin passes through the upper die holder 21 and is connected to the push block 25; the upper end of the adjusting screw 26 is in threaded connection with the upper die holder 21, and the lower end of the adjusting screw extends into the cylinder from the second through hole 121 and the third through hole 231 and is aligned with the second cylinder 142; when the upper die is moved downward so that the lower end of the adjustment screw 26 contacts the second cylinder 142, a gap 300 (see fig. 2 or 3) exists between the lower surface of the male and female die 22 and the upper surface of the first cylinder 141 of the draw-holder 14.

In this embodiment, the lower side of the upper die holder 21 is provided with a mounting hole 213 (see fig. 4), the mounting hole 213 is aligned with the second through hole 121, and the adjusting screw 26 is inserted into the mounting hole 213 and is in threaded connection with the mounting hole 213.

In this embodiment, the upper surface of the male die 13 is higher than the upper surface of the top wall of the female die 12.

In this embodiment, the ejector block 25 is connected to the knockout rod 24 through a bolt, and the female die 12 is connected to the lower die holder 11 through a bolt.

In this embodiment, referring to fig. 2, the upper die further includes a first connecting rod 291 and a first spring 292, the first connecting rod 291 is slidably inserted in the upper die base 21, and a lower end of the first connecting rod 291 penetrates out of the upper die base 21 and is connected to the blank holder 23; the first spring 292 is sleeved on the first connecting rod 291, and the upper end and the lower end of the first spring 292 elastically support the upper die holder 21 and the blank holder 23 respectively. The upper die holder 21 is provided with a first stepped hole 211 which is through up and down, and the first stepped hole 211 comprises a first upper section hole 2111 with a larger inner diameter and a first lower section hole 2112 with a smaller inner diameter; the first connecting rod 291 comprises a rod 2912 and a head 2911 connected to the upper end of the rod 2912, wherein the rod 2912 is connected with the blanking clamping ring 23; the first upper aperture 2111 allows the stem 2912 and the head 2911 to pass through; the first lower section aperture 2112 allows the stem 2912 to pass through and does not allow the head 2911 to pass through. Specifically, the first connecting rod 291 is a screw rod, and the first connecting rod 291 and the blank holder 23 are connected by a screw thread. Through the design, the blanking blank holder 23 is elastically connected with the upper die holder 21. It can be seen that, when the upper die holder 21 moves downward, the blanking blank holder 23 can move downward synchronously, and when the lower side of the blanking blank holder 23 is obstructed, if the upper die holder 21 continues to move downward, the blanking blank holder 23 does not move downward and compresses the first spring 292, and the first step hole 211 on the upper die holder 21 moves downward relative to the first connecting rod 291.

In this embodiment, the upper die holder 21 is provided with a second stepped hole 212 which is through up and down, and the second stepped hole 212 includes a second upper-stage hole with a smaller inner diameter and a second lower-stage hole with a larger diameter; the male and female die 22 includes a fourth cylinder 223 connected to the upper end of the third cylinder 222, the outer diameter of the fourth cylinder 223 is larger than the outer diameter of the third cylinder 222, the inner diameter of the second lower hole matches the outer diameter of the fourth cylinder 223 so that the fourth cylinder 223 can be just inserted into the second lower hole, and the fourth cylinder 223 is inserted into the second lower hole and is fixedly connected to the upper die holder 21 through a bolt. Thus, the male and female dies 22 can be moved up and down in synchronization with the upper die base 21.

In this embodiment, the upper die further includes a second spring 293, the second spring 293 is sleeved on the knockout rod 24, and the upper end and the lower end of the second spring 293 respectively and elastically support the upper die base 21 and the ejector 25. The upper die further comprises a die handle 20, the die handle 20 is fixed on the upper side of the upper die base 21 through a bolt, a fourth stepped hole which is through up and down is formed in the middle of the die handle 20, the fourth stepped hole is aligned with the second stepped hole 212, the fourth stepped hole is provided with a fourth upper section hole with a larger inner diameter and a fourth lower section hole with a smaller inner diameter, the material beating rod 24 is provided with a clamping column with a larger outer diameter and a guide column with a smaller outer diameter, the outer diameter of the guide column is matched with the inner diameter of the fourth lower section hole, the guide column is inserted into the fourth lower section hole in a sliding mode, the clamping column is contained in the fourth upper section hole, the outer diameter of the clamping column is larger than the inner diameter of the fourth lower section hole, and the fourth lower section hole does not allow the clamping column to pass through. According to the above design, it should be understood that when the upper die holder 21 moves downwards, the material beating rod 24 and the pushing block 25 can move downwards synchronously, when the lower side of the pushing block 25 is obstructed, if the upper die holder 21 continues to move downwards, the pushing block 25 does not move downwards any more and compresses the second spring 293, and the upper die holder 21 moves downwards relative to the material beating rod 24 and the pushing block.

In this embodiment, the lower die further includes an elastic pad 15, the elastic pad 15 is slidably sleeved outside the male die 13, the lower end of the elastic pad 15 is supported on the lower die holder 11, and the lower end of the second cylinder 142 of the drawing and blank holder 14 is supported on the elastic pad 15.

In this embodiment, the upper die base 21 has three first stepped holes 211 and three mounting holes 213, and correspondingly, the upper die includes three first connecting rods 291, three first springs 292, and three adjusting screws. Wherein, three first stepped holes 211 and three mounting holes 213 are alternately arranged and distributed at six vertexes of the same regular hexagon (see fig. 4).

The blanking and drawing process of the blank member 400 using the blanking and drawing composite die is as follows.

The upper die holder 21 is moved to an initial position in advance, and is not in contact with the lower die holder 11 at this time, and the blank 400 is placed on the lower die holder 11; then driving the upper die holder 21 to move downwards, wherein in the process that the upper die holder 21 moves downwards, the push block piece, the male and female dies 22 and the blanking blank holder 23 all move downwards along with the upper die holder 21;

when the upper die holder 21 moves downwards until the push block piece is obstructed by the male die 13, the push block piece compresses the second spring 293, and the second spring 293 applies downward pressure to the push block piece, so that the push block piece and the male die 13 jointly clamp the central part of the blank 400;

when the upper die holder 21 continues to move downwards, so that the blanking blank holder 23 is obstructed by the top wall of the female die 12, the blanking blank holder 23 compresses the first spring 292, and the second spring 293 applies downward pressure to the blanking blank holder 23, so that the blanking blank holder 23 and the top wall of the female die 12 jointly clamp the edge part of the blank 400;

when the upper die holder 21 continues to move downwards, the male and female dies 22 continue to move downwards along with the upper die and continuously press the middle part (located between the central part and the edge part) of the blank 400, and because the edge part of the blank 400 is clamped by the blanking and blank holder 23 and the female die 12 at the same time, the middle part of the blank 400 receives the downward pressure of the male and female dies 22, the blank 400 finishes blanking under the action of shearing force;

when the upper die holder 21 continues to move down so that the lower end of the adjustment screw 26 abuts against the upper surface of the second post 142 of the draw-holder 14, there is a gap 300 of just the appropriate width between the upper surface of the first post 141 of the draw-holder 14 and the lower surface of the male-female die 22. When the upper die holder 21 continuously moves downwards, the concave-convex die 22 continuously moves downwards synchronously with the upper die holder and compresses the elastic pad 15, and the elastic pad 15 is placed below the drawing blank holder 14 to absorb energy. The drawing blank holder 14 is pressed down by the adjusting screw and moves downward synchronously with the adjusting screw, so that the concave-convex die 22 and the drawing blank holder 14 move synchronously, and the width of a gap 300 between the concave-convex die 22 and the drawing blank holder 14 is kept unchanged. Therefore, the gap 300 between the concave-convex die 22 and the drawing blank holder 14 can prevent the parts from being excessively stacked, the deformation of the parts is limited within the allowable range of the gap 300, the deformation of the parts extrudes the drawing blank holder 14, when the extrusion force is generated on the drawing blank holder 14, according to the force action force and the reaction force principle, the drawing blank holder 14 can generate the blank holder force with equal size and opposite direction on the parts, the blank holder force is further increased along with the further progress of drawing, the material feeding and the stacking trend are intensified, the extrusion force of the parts on the drawing blank holder 14 is increased, and the blank holder force of the drawing blank holder 14 on the parts is also increased accordingly. Therefore, the blank holder force is synchronously changed along with the deformation of the part, and the problem that the blank holder force cannot be adjusted in a self-adaptive manner in the conventional deep drawing process is solved.

It should be noted that, since the upper end of the adjustment screw 26 is screwed into the mounting hole 213, the height of the lower end face of the adjustment screw can be adjusted by screwing the adjustment screw, and thus the width of the gap 300 between the upper surface of the first cylinder 141 of the drawing holder 14 and the lower surface of the female and male dies 22 can be adjusted when the lower end of the adjustment screw 26 abuts against the upper surface of the second cylinder 142 of the drawing holder 14. In this way, it is convenient for us to adjust the width of the gap 300 to an appropriate value as required.

After the drawing process is completed, the knockout pin 24 pushes the ejector block 25, so that the drawn blank 400 can be ejected from the female and male dies 22.

Further, referring to fig. 2 and 3, the lower surface of the fourth column 223 is flush with the lower surface of the upper die holder 21; the upper die further comprises a first pressing ring 27 which is sleeved on the outer side of the third cylinder 222 and is fixedly connected with the upper die base 21, and the upper surface of the first pressing ring 27 supports against the fourth cylinder 223 and the lower surface of the upper die base 21 respectively. Thus, the male and female dies 22 are more stably mounted on the lower side of the upper die base 21, and the stability of the structure and performance of the blanking and drawing composite die is ensured. A first avoidance hole 271 which is through up and down is formed in the first pressing ring 27, the first avoidance hole 271 is aligned with the first stepped hole 211, and the lower end of the first connecting rod 291 sequentially penetrates through the first stepped hole 211 and the first avoidance hole 271 from top to bottom; the upper end of the first spring 292 is inserted into the first escape hole 271. A second avoidance hole 272 which is vertically communicated is formed in the first pressing ring 27, and the second avoidance hole 272 is aligned with the third through hole 231; the upper end of the adjusting screw 26 passes through the second avoiding hole 272 and then extends into the upper die holder 21 to be in threaded connection with the upper die holder 21; the upper die further comprises a compression nut 281, the compression nut 281 is sleeved on the upper portion of the adjusting screw 26 and is in threaded connection with the adjusting screw 26, and the upper surface of the compression nut 281 tightly pushes the lower side of the first compression ring 27. A gasket 282 is also provided between the compression nut 281 and the first compression ring 27.

Further, the male die 13 comprises a bottom plate 131 with a larger outer diameter and a punching rod 132 with a smaller outer diameter; the lower die further comprises a second pressing ring 16 which is sleeved on the outer side of the male die 13 and is fixedly connected with the lower die base 11, the second pressing ring 16 is provided with a third stepped hole which is communicated up and down, the third stepped hole comprises a third upper-section hole with a smaller inner diameter and a third lower-section hole with a larger inner diameter, the chassis 131 of the male die 13 is accommodated in the third lower-section hole, and the stamping rod 132 of the male die 13 penetrates out of the third upper-section hole upwards; the step surface connecting the third upper-stage hole and the third lower-stage hole is pressed against the upper surface of the chassis 131; the elastic pad 15 is slidably sleeved outside the stamping rod 132 and supported on the upper surface of the second pressing ring 16. Specifically, the second pressing ring 16 is fixedly connected with the lower die holder 11 through a bolt, and the male die 13 is fixedly connected with the lower die holder 11 through a bolt. Therefore, the male die 13 is directly fixed to the lower die holder 11 on one hand, and is pressed against the lower die holder 11 by the second pressing ring 16 on the other hand, so that the male die is more stably mounted on the lower die holder 11, and stability of the structure and performance of the blanking and drawing composite die is ensured. Here, it is to be noted that it is mentioned above that the inner diameter of the cavity 221 of the male and female die 22 is larger than the outer diameter of the male die 13, specifically, the outer diameter of the cavity 221 is designed to be slightly larger than the outer diameter of the punch rod 132 of the male die 13.

In summary, in the blank-drawing composite die provided in this embodiment, when the lower end of the adjusting screw 26 abuts against the upper surface of the second column 142 of the drawing holder 14, the gap 300 between the lower surface of the concave-convex die 22 and the upper surface of the first column 141 of the drawing holder 14 well limits the deformation space of the part during drawing. In the early stage of drawing, the deformation degree of the part is within the allowable range of the gap 300, does not interact with the concave-convex die 22 and the drawing blank holder 14, and does not bear crease-resistant pre-pressure; in the forming process, the female die 12 moves downwards, the part deformation generates the stacking trend, the width of a gap 300 between the female die 22 and the drawing blank holder 14 is kept unchanged, therefore, the gap 300 can prevent the part from being stacked excessively, the part deformation is limited in the allowable range of the gap 300, the part deformation extrudes the drawing blank holder 14, the drawing blank holder 14 generates extrusion force, according to the force action principle and the reaction force principle, the drawing blank holder 14 can generate blank holding force with equal size and opposite direction on the part, the material walking and the stacking trend are intensified, the extrusion force of the part on the drawing blank holder 14 is increased, and the blank holding force of the drawing blank holder 14 on the part is increased accordingly. Therefore, the blank holder force is synchronously changed along with the deformation of the part, and the problem that the blank holder force cannot be adjusted in a self-adaptive manner in the conventional deep drawing process is solved.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the structure or unit to which the reference is made must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is protected by the following claims.

Claims (10)

1. A blanking deep drawing composite die is characterized by comprising a lower die and an upper die movably arranged above the lower die; wherein,

the lower die comprises a lower die seat (11), a female die (12), a male die (13) and a drawing blank holder (14); the female die (12) is provided with a hollow cylinder and a top wall connected with the upper end of the cylinder, the lower end of the cylinder is connected to the upper side of the lower die holder (11), and the top wall is provided with a first through hole and a second through hole (121); the lower end of the male die (13) is connected to the upper side of the lower die holder (11), is positioned in the barrel and is aligned with the first through hole; the drawing blank holder (14) is slidably sleeved on the outer side of the male die (13), the lower end of the drawing blank holder is elastically supported on the lower die holder (11), the drawing blank holder (14) comprises a first cylinder (141) and a second cylinder (142) connected to the lower end of the first cylinder (141), the outer diameter of the second cylinder (142) is larger than that of the first cylinder (141), and the outer diameter of the first cylinder (141) is matched with the inner diameter of the first through hole;

the upper die comprises an upper die base (21), a concave-convex die (22), a blanking blank holder (23), a knockout rod (24), a piece pushing block (25) and an adjusting screw (26); the male and female die (22) is connected to the lower side of the upper die holder (21), a cavity (221) which is vertically penetrated and aligned with the male die (13) is formed in the middle of the male and female die (22), the inner diameter of the cavity (221) is larger than the outer diameter of the male die (13), and a third cylinder (222) with the outer diameter identical to that of the first cylinder (141) of the drawing blank holder (14) is formed in the lower portion of the male and female die (22); the blanking blank holder (23) is slidably sleeved on the outer side of the third cylinder (222) and is elastically connected with the upper die holder (21), and a third through hole (231) aligned with the second through hole (121) is formed in the blanking blank holder (23); the push piece block (25) is movably inserted into the cavity (221), and the upper end of the push piece block is elastically connected with the upper die holder (21); the material beating rod (24) is movably inserted into the upper die base (21), and the lower end of the material beating rod penetrates through the upper die base (21) and is connected to the pushing piece block (25); the upper end of the adjusting screw rod (26) is in threaded connection with the upper die holder (21), and the lower end of the adjusting screw rod extends into the cylinder from the second through hole (121) and the third through hole (231) and is aligned with the second cylinder (142);

when the upper die moves downward so that the lower end of the adjusting screw (26) contacts the second cylinder (142), a gap (300) exists between the lower surface of the male-female die (22) and the upper surface of the first cylinder (141) of the drawing holder (14).

2. The blanking and drawing composite die as set forth in claim 1, wherein the lower die further comprises an elastic pad (15), the elastic pad (15) is slidably sleeved outside the male die (13) and the lower end of the elastic pad is supported on the lower die holder (11), and the lower end of the second cylinder (142) of the drawing and pressing ring (14) is supported on the elastic pad (15).

3. The blanking and deep drawing compound die as set forth in claim 1, characterized in that the upper die further comprises a first connecting rod (291) and a first spring (292), the first connecting rod (291) is slidably inserted into the upper die base (21), and the lower end of the first connecting rod (291) penetrates out of the upper die base (21) and is connected with the blanking and blank holder (23); the first connecting rod (291) is sleeved with the first spring (292), and the upper end and the lower end of the first spring (292) respectively and elastically abut against the upper die holder (21) and the blanking blank holder (23).

4. The blanking and deep drawing composite die according to claim 3, wherein the upper die base (21) is provided with a first step hole (211) which is communicated up and down, and the first step hole (211) comprises a first upper-stage hole (2111) with a larger inner diameter and a first lower-stage hole (2112) with a smaller inner diameter; the first connecting rod (291) comprises a rod part (2912) and a head part (2911) connected to the upper end of the rod part (2912), and the rod part (2912) is connected with the blanking clamping ring (23); the first upper section aperture (2111) allows the stem (2912) and the head (2911) to pass through; the first lower section aperture (2112) allows the stem (2912) to pass through and does not allow the head (2911) to pass through.

5. The blanking and deep drawing compound die as set forth in claim 4, characterized in that the upper die base (21) is provided with a second stepped hole (212) which is communicated up and down, and the second stepped hole (212) comprises a second upper-stage hole with a smaller inner diameter and a second lower-stage hole with a larger diameter; the male and female die (22) comprises a fourth cylinder (223) connected to the upper end of the third cylinder (222), the outer diameter of the fourth cylinder (223) is larger than that of the third cylinder (222), the inner diameter of the second lower section hole is matched with that of the fourth cylinder (223), and the fourth cylinder (223) is inserted into the second lower section hole.

6. The blanking and deep drawing compound die as claimed in claim 5, characterized in that the lower surface of the fourth cylinder (223) is flush with the lower surface of the upper die base (21); the upper die further comprises a first pressing ring (27) which is sleeved on the outer side of the third cylinder (222) and fixedly connected with the upper die base (21), and the upper surface of the first pressing ring (27) supports against the fourth cylinder (223) and the lower surface of the upper die base (21) respectively.

7. The blanking and drawing composite die according to claim 6, wherein the first pressing ring (27) is provided with a first avoiding hole (271) which penetrates up and down, the first avoiding hole (271) is aligned with the first stepped hole (211), and the lower end of the first connecting rod (291) sequentially penetrates through the first stepped hole (211) and the first avoiding hole (271) from top to bottom; the upper end of the first spring (292) is inserted into the first avoiding hole (271).

8. The blanking and drawing composite die according to claim 6, wherein a second avoidance hole (272) which penetrates up and down is formed in the first pressing ring (27), and the second avoidance hole (272) is aligned with the third through hole (231); the upper end of the adjusting screw rod (26) penetrates through the second avoidance hole (272) and then extends into the upper die holder (21) to be in threaded connection with the upper die holder (21); the upper die further comprises a compression nut (281), the upper portion of the adjusting screw rod (26) is sleeved with the compression nut (281), the compression nut (281) is in threaded connection with the adjusting screw rod (26), and the upper surface of the compression nut (281) tightly pushes against the lower side of the first compression ring (27).

9. The blanking and deep drawing compound die as set forth in claim 1, wherein the upper die further comprises a second spring (293), the second spring (293) is sleeved on the knockout rod (24), and the upper end and the lower end of the second spring (293) respectively and elastically support the upper die base (21) and the ejector block (25).

10. The blank drawing composite die according to claim 2, characterized in that the male die (13) comprises a bottom plate (131) with a larger outer diameter and a punching rod (132) with a smaller outer diameter; the lower die further comprises a second pressing ring (16) which is sleeved on the outer side of the male die (13) and fixedly connected with the lower die base (11), the second pressing ring (16) is provided with a third stepped hole which is communicated up and down, the third stepped hole comprises a third upper-section hole with a smaller inner diameter and a third lower-section hole with a larger inner diameter, a chassis (131) of the male die (13) is accommodated in the third lower-section hole, and a stamping rod (132) of the male die (13) penetrates out of the third upper-section hole; the step surface connecting the third upper section hole and the third lower section hole is pressed on the upper surface of the chassis (131); the elastic pad (15) is slidably sleeved outside the stamping rod (132) and supported on the upper surface of the second pressing ring (16).

Images