CN214919602U - Drawing trimming die for flange-free parts - Google Patents

Abstract

The utility model provides a tensile side cut mould of no flange part, tensile side cut mould includes: the upper die assembly, the lower die assembly and the stretching trimming assembly; the stretching trimming component comprises from top to bottom in sequence: the device comprises a female template, a material pressing plate, a stretching male template and a male template; the female template is connected with the upper die assembly, the male template and the material pressing plate are connected with the lower template, and the drawing male template is connected with the male template; the female die plate is internally provided with a stretching cavity, and chamfers are arranged on the lower side of the stretching cavity and the periphery of the male die plate in butt joint. The utility model discloses technical scheme compresses tightly raw and other materials downstream and begins tensile raw and other materials through female template to pressing the flitch motion, female template with pressing the flitch, gets into tensile chamber completely when public template, and female template's chamfer and public template cutting raw and other materials accomplish the tensile side cut of raw and other materials, have realized the integration of tensile side cut process, have guaranteed the precision of no flange part and have reduced the cost again.

Description

Drawing trimming die for flange-free parts

Technical Field

The utility model relates to a mould field, concretely relates to tensile side cut mould of no flange part.

Background

The drawing process of the flange-free part is always carried out in the stamping production process. And the flange-free part usually has blank pressing allowance during stretching, so that the stretching forming of the workpiece is facilitated. The processing technology of the flange-free part comprises the following steps: stretching → trimming.

For some parts without flanges with low precision requirements, the edge cutting process is generally carried out by a cutting machine or a machining mode; for some parts with higher requirements on height and size of the opening end, the parts need to be transferred to a cutting machine for trimming after being stretched and formed, the coaxiality of the parts cannot be guaranteed, the processing requirements cannot be met, the size precision of the parts after trimming is difficult to guarantee, and meanwhile, the product cost is increased in the transferring process of the parts.

Therefore, how to reduce the production cost of the flangeless part while ensuring the quality of the flangeless part is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tensile side cut mould of no flange part aims at guaranteeing to have under the condition of flange part quality, reduces the manufacturing cost of no flange part through the processing technology of improvement tradition no flange part.

In order to achieve the above object, the utility model provides a tensile side cut mould of no flange part, tensile side cut mould includes: the upper die assembly, the lower die assembly and the stretching trimming assembly;

the upper die assembly, the stretching trimming assembly and the lower die assembly are sequentially arranged from top to bottom;

the stretching trimming component comprises from top to bottom in sequence: the device comprises a female template, a material pressing plate, a stretching male template and a male template;

the female die plate is connected with the upper die assembly, the male die plate and the material pressing plate are connected with the lower die assembly, and the drawing male die plate is connected with the male die plate;

the female die plate is internally provided with a stretching cavity, and chamfers are arranged on the lower side of the stretching cavity and the periphery of the male die plate in butt joint.

Preferably, the difference between the external dimensions of the drawing core and the male template is 1.5-3 times of the thickness of the raw material.

Preferably, the lower die assembly includes: the lower die base, the lower fixing plate and the limiting rod are arranged on the lower die base; the lower fixing plate is arranged above the lower die base and connected with the lower die base, the limiting rod is connected with the lower die base and the lower fixing plate, the male die plate is connected with the lower die base, and the limiting rod is in penetrating connection with the pressure plate.

Preferably, the female die plate is provided with a limiting groove at the corresponding position of the limiting rod, and the limiting groove is connected with the limiting rod in a matched manner.

Preferably, the male die plate is connected with the lower die holder, and the male die plate penetrates through the lower fixing plate.

Preferably, the limiting rod is in through connection with the pressure plate, a spring is arranged on the outer side of the limiting rod, and the spring is arranged between the pressure plate and the lower fixing plate.

Preferably, the upper die assembly includes: the die comprises a die handle, an upper die base, a base plate, an upper fixing plate and a push rod; the die comprises an upper die base, a base plate, an upper fixing plate, a die handle, a cavity, a push rod, a female die plate and a base plate, wherein the upper die base, the base plate and the upper fixing plate are sequentially arranged from top to bottom, the upper die base, the base plate and the upper fixing plate are connected through fasteners, the die handle is connected with the upper die base, the cavity for accommodating the push rod is arranged in the die handle, the push rod penetrates through the base plate and the female die plate, and the push rod is connected with the die handle in a matched mode.

Preferably, a shape-setting plate is arranged in the stretching cavity, and the shape-setting plate is connected with the push rod.

Preferably, the upper fixing plate is arranged on the outer side of the female die plate, a limiting boss is arranged on the outer side of the female die plate, a limiting groove is formed in the inner side of the upper fixing plate, and the upper fixing plate is connected with the female die plate in a matched mode.

Preferably, a gap is arranged between the shape plate and the stretching male.

The technical proposal of the utility model is that the female die plate, the material pressing plate, the drawing die and the male die plate are adopted, the female die plate is connected with the upper die component, the male die plate and the material pressing plate are connected with the lower die component, the drawing die is connected with the top of the male die plate, the drawing trimming die is arranged on a punch press or a press machine, the female die plate is driven by the machine motion to move downwards and move downwards, the female die plate and the material pressing plate are pressed tightly, the raw material continues to move downwards to contact the drawing die and start to draw, when the machine moves to a bottom dead center, the male die plate completely enters into the drawing cavity of the female die plate, when the drawing is completed, because the lower side of the drawing cavity and the periphery of the butt of the male die plate are provided with a chamfer with the radius of R, the chamfer is matched with the male die plate, the cutting of the edge of a flange-free part is completed, therefore, the stretching and trimming of the flange-free part are realized, the stretching and trimming processes are combined under the condition of ensuring the quality of the flange-free part, and the production cost of the flange-free part is reduced.

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 cross-sectional view of a first embodiment of a stretch trimming die of the present invention;

fig. 2 is a sectional view showing an operation state of the first embodiment of the present invention;

fig. 3 is a cross-sectional view of a second embodiment of the stretch trimming die of the present invention;

fig. 4 is a sectional view showing an operation state of the second embodiment of the present invention;

fig. 5 is a schematic structural view of a thimble assembly according to a second embodiment of the present invention.

The reference numbers illustrate:

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, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications 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 indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating 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.

Referring to fig. 1 and 2, in a first embodiment of the present invention, the stretch trimming die 100 includes: the device comprises an upper die assembly 1, a stretching trimming assembly 2 and a lower die assembly 3; the upper die assembly 1, the stretching trimming assembly 2 and the lower die assembly 3 are sequentially arranged from top to bottom; the stretching trimming component 2 comprises from top to bottom in sequence: the female die plate 21, the pressure plate 22, the stretching male 23 and the male die plate 24; the female die plate 21 is connected with the upper die assembly 1, the male die plate 24 and the pressure plate 22 are connected with the lower die assembly 3, and the stretching male die 23 is connected with the male die plate 24; the female die plate 21 is internally provided with a stretching cavity 211, and the periphery of the lower side of the stretching cavity 211 abutted to the male die plate 24 is provided with a chamfer 212.

The radius of the chamfer 212 is R, the value of R depends on the plate thickness of the raw material plate and the material of the raw material plate, the radius R of the chamfer 212 which is most suitable for the corresponding plate thickness can be obtained by calculation of a formula, the chamfer 212 adopts a fillet with the radius of R, so that the chamfer 212 can obtain stronger structural strength, and the problem that the mouth part of the existing machined part has a sharp cutting edge structure after the trimming process is finished can be well solved by the round chamfer 212 in the trimming process. In the technical scheme, the stretching trimming die 100 is installed in corresponding equipment, the upper die assembly 1 is driven by the equipment to move downwards, that is, the female die plate 21 connected with the upper die assembly moves downwards, in the downward stage, the female die plate 21 and the material pressing plate 22 clamp a raw material plate, the female die plate 21 continues to move downwards, when the upper surface of the stretching male 23 starts to enter the stretching cavity 211, the stretching of the raw material plate starts, and when the chamfer 212 is flush with the upper surface of the male die plate 24, the stretching of the raw material plate is completed; the female die plate 21 continues to move downwards, when the male die plate 24 completely enters the drawing cavity 211, namely when the equipment runs to a bottom dead center, the chamfer 212 is matched with the upper surface of the male die plate 24, the cutting of the edge outside the drawing part of the raw material plate is completed, and the drawing and trimming of the non-edge part are realized.

Further, the difference between the external dimensions of the stretching male 23 and the male template 24 is 1.5-3 times of the thickness of the raw material. It should be noted that, in the stretching of a part in the prior art, tearing and breaking of a stretched portion of the part often occur, because the stretching amount is too large or no sufficient allowance is left for raw materials between the stretching male 23 and the male template 24, in this embodiment, the difference between the external dimensions of the stretching male 23 and the male template 24 is 1.5 to 3 times of the thickness of the raw materials, and the stretching male 23 and the male template 24 are connected by threads, so that the stretching male 23 can be quickly replaced, and the difference between the external dimensions of the stretching male 23 and the male template 24 can be flexibly adjusted according to different thicknesses of the raw materials, thereby ensuring the stretching process. In other embodiments, the connection between the male die 23 and the male die plate 24 may be achieved by a bolt connection embedded in the male die plate or a snap connection, so as to achieve a quick replacement of the male die 23.

Further, the lower die assembly 3 includes: a lower die holder 31, a lower fixing plate 32 and a limiting rod 33; the lower die holder 31 is connected with the limiting rod 33, the lower fixing plate 32 is arranged above the lower die holder 31 and connected with the lower die holder 31, the limiting rod 33 is connected with the lower die holder 31 and the lower fixing plate 32, the male die plate 24 is connected with the lower die holder 31, and the limiting rod 33 is connected with the pressure plate 22 in a penetrating manner. It should be noted that the limiting rod 33 is used for limiting the movement tracks of the female die plate 21 and the male die plate 24, so as to ensure that the deformation of the stretching piece due to the shaking of the equipment is avoided in the stretching process, and ensure the stretching quality of the stretching piece. The lower die holder 31 is used for installing the stretching and trimming die 100 and the equipment to be connected and fix the stretching and trimming die 100, and the lower fixing plate 32 is used for fixing the male die plate 24 and adjusting the stretching height of the stretching and trimming die 100, so that the stretching piece is prevented from being torn or broken in the stretching process.

Specifically, the female mold plate 21 is provided with a limiting groove 213 at a corresponding position of the limiting rod 33, and the limiting groove 213 is connected with the limiting rod 33 in a matching manner. It should be noted that the top of the limiting rod 33 is chamfered, so that the quality problem of the flange-free part due to the non-concentricity of the drawing trimming die 100 caused by installation errors is avoided, and the combination of the drawing trimming die 100 after maintenance is facilitated. In this embodiment, the limit of the stretching movement of the male mold plate 24 and the female mold plate 21 and the limit of the stretching height are realized by the limit rod 33 and the limit groove 213; in other embodiments, the determination of the stretching height limit and the stretching motion track can also be realized by installing a sensor or a limiter on the equipment or the die.

Specifically, the male mold plate 24 is connected to the lower mold base 31, and the male mold plate 24 penetrates through the lower fixing plate 32. In this embodiment, the male mold plate 24 penetrates through the lower fixing plate 32 and is connected with the lower mold base 31 through bolts, and the bolts are embedded in the lower mold base 31, so that the installation of the stretching trimming mold 100 is facilitated, and meanwhile, the male mold plate 24 can be quickly detached and maintained conveniently; the quick replacement of the male die plates 24 of different specifications can be realized by simultaneously replacing the pressure plate 22 and the male die plates 24, and the applicability and the universality of the drawing and trimming die 100 are improved. In other embodiments, the male mold plate 24 and the lower mold plate 31 may be connected by a screw or a snap connection.

Specifically, the limiting rod 33 is connected to the pressure plate 22 in a penetrating manner, a spring 331 is disposed on the outer side of the limiting rod 33, and the spring 331 is disposed between the pressure plate 22 and the lower fixing plate 32. In this embodiment, the spring 331 is disposed between the blank holder 22 and the lower fixing plate 32, so that the blank holding force for clamping the raw material plate by the mother board 21 and the blank holder 22 can be adjusted during the stretching process, and when the required blank holding force changes, the blank holding force can be adjusted by replacing the spring 331 with different strength; in other embodiments, the spring 331 may also be made of a material with good resilience, such as polyurethane and nitrile rubber, or a hydraulic system may implement real-time control of the blank holder force.

Further, the upper die assembly 1 includes: the die comprises a die shank 11, an upper die base 12, a backing plate 13, an upper fixing plate 14 and a push rod 15; the die comprises an upper die base 12, a base plate 13 and an upper fixing plate 14, wherein the upper die base 12, the base plate 13 and the upper fixing plate 14 are sequentially arranged from top to bottom, the upper die base 12, the base plate 13 and the upper fixing plate 14 are connected through fasteners, a die shank 11 is connected with the upper die base 12, a cavity for accommodating a push rod 15 is arranged in the die shank 11, the push rod 15 penetrates through the base plate 13 and a female die plate 21, and the push rod 15 is connected with the die shank 11 in a matched mode. It should be noted that a boss is arranged at the bottom of the die shank 11, the upper die holder 12 is provided with a cavity for accommodating the die shank 11, and the bottom of the die shank 11 is connected with the cavity in a matching manner. In this embodiment, the female die plate 21 is connected to the upper die assembly 1 through the upper fixing plate 14, that is, the female die plate 21 can be replaced or maintained by detaching the upper fixing plate 14, and the upper fixing plate 14 and the female die plate 21 can be replaced at the same time, so that the processing requirements of the stretching pieces with different sizes and specifications are met, and the universality and the applicability of the stretching trimming die 100 are improved.

Specifically, a shaping plate 2111 is arranged in the stretching cavity 211, and the shaping plate 2111 is connected with the push rod 15. It should be noted that, in this embodiment, the push rod 15 is used to push the shaping plate 2111, the stretching member moves along with the shaping plate 2111 after the processing is completed, and the push rod 15 adopts pneumatic driving to push the shaping plate 2111 to move, that is, the stretching member falls off from the stretching cavity 211, so as to complete the whole stretching and trimming process. In other embodiments, the driving manner of the push rod 15 can also be electric driving and hydraulic driving.

Specifically, the upper fixing plate 14 is arranged on the outer side of the female die plate 21, a limiting boss is arranged on the outer side of the female die plate 21, a limiting groove is arranged on the inner side of the upper fixing plate 14, and the upper fixing plate 14 is connected with the female die plate 21 in a matched mode. In this embodiment, the upper fixing plate 14 and the female mold plate 21 are fixed in a limited manner by the limiting bosses and the limiting grooves, in other embodiments, the female mold plate 21 may be directly fixed to the upper cushion plate 13 or the upper mold base 12, or an acute-angled inclined surface is disposed on the outer side of the female mold plate 21, and an inclined surface with the same angle is disposed on the inner side of the upper fixing plate 14, so that the upper fixing plate 14 can fix the female mold plate 21.

Wherein a gap is provided between the shape plate 2111 and the drawing male 23. It should be noted that the shape of the gap is the shape of the stretching member, the gap depends on the wall thickness of the stretching member, and the gap between the shaping plate 2111 and the stretching male 23 can be adjusted by driving the push rod 15, so as to meet the requirements of the same specification of the stretching member and different wall thicknesses. While the gap also serves for the shaping of the drawing member, minor deformations of the drawing member can be eliminated by the effect of the gap between the shaping plate 2111 and the drawing pin 23.

Referring to fig. 3 and 4, in the second embodiment of the present invention, the second embodiment is mostly the same as the above embodiment, except that, in this embodiment, the push rod 15 and the shaping plate 2111 are eliminated, and the thimble assembly 34 is added, in the first embodiment of the present invention, the stretching member moves along with the shaping plate 2111, in the second embodiment of the present invention, the stretching member is fixed on the stretching male member 23, and the push rod 15 and the shaping plate 2111 are eliminated, and the female mold plate 21 and the shaping plate 2111 are combined into the same entity.

The ejector pin assembly 34 is arranged on the male die plate 24, the ejector pin assembly 34 penetrates through the stretching male die 23, and the ejector pin assembly 34 is connected with the male die plate 24; the ejector pin assembly 34 includes: housing 341, high tension spring 342, and post 343.

The high-strength spring 342 is arranged in the inner cavity of the outer shell 341, one end of the push rod 343 is connected with the high-strength spring 342, the other end of the push rod 343 is connected with the outer shell 341 in a penetrating way,

the diameter of the bottom surface of the top bar 343 is the same as the inner diameter of the outer shell 341, the bottom surface of the top bar 343 is connected with the high-strength spring 342, the diameter of the rod body of the top bar 343 is smaller than the diameter of the bottom surface of the top bar 343, and the rod body of the top bar 343 is connected with the outer shell 341 in a penetrating manner. In the embodiment, the top rod 342 is pushed to separate the stretching member from the stretching male member 23 by the elastic recovery of the high-strength spring 342; in other embodiments, the driving mode of the push rod 343 can be pneumatic, hydraulic or electric; or, directly driving the stretching male 23 to move upwards so that the stretching piece is separated from the stretching male 23, wherein the driving mode comprises the following steps: pneumatic, electric, and hydraulic; or, the reinforcing rib groove is added on the upper surface of the stretching male, so that the structural strength of the stretching piece is increased, and the stretching piece is easier to separate from the stretching male 23.

It should be noted that, in order to prevent the stretching member from moving along with the female die plate 21, the end surfaces with gaps between the female die plate 21 and the stretching male die 23 are all polished or treated by a percolation method, so as to ensure the smoothness of the end surfaces, and the raw material can also be subjected to surface treatment, so as to improve the surface appearance and achieve the purpose of oil-storing on the plate surface. Such as shot blasting, spark blasting, laser, etc., to prevent mold sticking.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (10)

1. A stretch trim die for flangeless parts, the stretch trim die comprising: the upper die assembly, the lower die assembly and the stretching trimming assembly;

the upper die assembly, the stretching trimming assembly and the lower die assembly are sequentially arranged from top to bottom;

the stretching trimming component comprises from top to bottom in sequence: the device comprises a female template, a material pressing plate, a stretching male template and a male template;

the female die plate is connected with the upper die assembly, the male die plate and the material pressing plate are connected with the lower die assembly, and the drawing male die plate is connected with the male die plate;

the female die plate is internally provided with a stretching cavity, and chamfers are arranged on the lower side of the stretching cavity and the periphery of the male die plate in butt joint.

2. The stretch-trim die of claim 1, wherein the difference in the external dimensions of the stretch core and the core plate is 1.5 to 3 times the thickness of the stock.

3. The stretch trim die of claim 1, wherein the lower die assembly comprises: the lower die base, the lower fixing plate and the limiting rod are arranged on the lower die base; the lower fixing plate is arranged above the lower die base and connected with the lower die base, the limiting rod is connected with the lower die base and the lower fixing plate, the male die plate is connected with the lower die base, and the limiting rod is in penetrating connection with the pressure plate.

4. The die for drawing and trimming of claim 3, wherein the female die plate is provided with a limiting groove at a corresponding position of the limiting rod, and the limiting groove is in fit connection with the limiting rod.

5. The die of claim 3, wherein the male die plate is connected to the lower die holder and extends through the lower retaining plate.

6. The stretch trimming die of claim 3, wherein the limiting rod is connected with the material pressing plate in a penetrating manner, and a spring is arranged outside the limiting rod and is arranged between the material pressing plate and the lower fixing plate.

7. The stretch-trim die of claim 1, wherein the upper die assembly comprises: the die comprises a die handle, an upper die base, a base plate, an upper fixing plate and a push rod; the die comprises an upper die base, a base plate, an upper fixing plate, a die handle, a cavity, a push rod, a female die plate and a base plate, wherein the upper die base, the base plate and the upper fixing plate are sequentially arranged from top to bottom, the upper die base, the base plate and the upper fixing plate are connected through fasteners, the die handle is connected with the upper die base, the cavity for accommodating the push rod is arranged in the die handle, the push rod penetrates through the base plate and the female die plate, and the push rod is connected with the die handle in a matched mode.

8. The die of claim 7 wherein a shape setting plate is disposed within the die cavity, the shape setting plate being coupled to the ram.

9. The die for drawing and trimming of claim 7, wherein the upper fixing plate is disposed outside the female die plate, a limiting boss is disposed outside the female die plate, a limiting groove is disposed inside the upper fixing plate, and the upper fixing plate is connected with the female die plate in a matching manner.

10. The stretch-trim die of claim 8, wherein a gap is provided between the shape plate and the stretch pin.

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