CN113579077A

CN113579077A - Step-shaped product forming die and forming method thereof

Info

Publication number: CN113579077A
Application number: CN202110981370.8A
Authority: CN
Inventors: 李志华; 庄严; 王�华; 王希亮; 宁涛; 李科进
Original assignee: Chengdu Homin Technology Co Ltd
Current assignee: Chengdu Homin Technology Co Ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-11-02

Abstract

The invention discloses a step type product forming die.A concave die insert (11) is internally and slidably provided with a top plate I (12) and a top plate II (13) which are in sliding contact with each other, the outer end surfaces of the top plate I (12) and the top plate II (13) are respectively provided with a clamping groove (14), the bottoms of two guide grooves (19) are respectively and fixedly provided with a cushion block (20), the top surfaces of the two cushion blocks (20) are respectively supported with a slide block (21) which is slidably arranged in the guide grooves (19), the inner side surface of the slide block (21) is fixedly provided with a clamping strip (22), and the inner side end and the outer side end of the slide block (21) are respectively provided with an inner inclined surface (27) and an outer inclined surface (28); an upper spring I (29) and an upper spring II (30) are arranged in the upper support (1), and the bottoms of the upper spring I (29) and the upper spring II (30) are respectively connected with an upper force transmission column I and an upper force transmission column II. The invention has the beneficial effects that: the forming quality is improved, the bottom of the step-shaped product is prevented from being deformed, subsequent leveling processing is not needed, and the degree of automation is high.

Description

Step-shaped product forming die and forming method thereof

Technical Field

The invention relates to the technical field of step type product forming, in particular to a step type product forming die and a forming method thereof.

Background

The structure of the step-shaped product is shown in fig. 1, a first step 40 and a second step 41 are arranged in the step-shaped product, the second step 41 is arranged below the first step 40, the part is formed by drawing the depth of the thin plate through a stamping die, the stamping die comprises an upper die and a lower die, a depth drawing convex die is arranged in the upper die, a concave die insert is arranged in the lower die, a top plate is arranged in the concave die insert in a sliding mode, and a spring is arranged on the bottom surface of the top plate.

When a step-shaped product is formed, a thin plate is horizontally placed on the top surface of a top plate of a lower die, an upper support is connected onto a punching head of a punch press, the punching head of the punch press is controlled to move downwards, the punching head drives a depth-drawing male die to move downwards, the thin plate is pressed between the top plate and the depth-drawing male die, the thin plate is sunken downwards along with the continuous downward movement of the depth-drawing male die, meanwhile, the top plate also synchronously moves downwards and downwards compresses a spring, and after the die is closed, a finished step-shaped product can be formed in a concave die insert in a deep mode. When the die is opened to take a product, the punching head of the punch press is controlled to move upwards, the punching head drives the deepening male die to move upwards, the deepening male die moves upwards and is far away from the step-shaped product, meanwhile, the top plate moves upwards under the restoring force of the spring, the top plate jacks up the finished step-shaped product, and after the deepening male die is reset, a worker can take the finished step-shaped product away from the top plate.

However, when the deepening male die is firstly away from the step-shaped product upwards, the top plate applies upward pressure to the bottom of the step-shaped product under the action of the spring, the pressure direction is as shown by an arrow in fig. 1, the bottom of the step-shaped product is pressed upwards by the top plate to deform, and therefore the processing quality of the step-shaped product is reduced, and further the bottom of the product needs to be leveled in the later period, so that the production process of the step-shaped product is increased undoubtedly, and the production efficiency of the step-shaped product is reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a step-shaped product forming die and a forming method thereof, wherein the step-shaped product forming die has the advantages of compact structure, improved forming quality, capability of preventing the bottom of a step-shaped product from deforming, no need of subsequent leveling processing and high automation degree.

The purpose of the invention is realized by the following technical scheme: a step type product forming die comprises an upper die and a lower die, wherein the upper die comprises an upper support, an upper padding plate and a fixing plate which are sequentially and fixedly arranged on the bottom surface of the upper support, a limiting plate and a discharging plate which are fixedly arranged on the whole are sequentially arranged below the fixing plate, a gap is reserved between the limiting plate and the fixing plate, a tension spring is fixedly arranged between the limiting plate and the fixing plate, the lower die comprises a base, a lower padding plate and a concave template are sequentially and fixedly arranged on the top surface of the base, a concave die insert is fixedly arranged in the concave template, a top plate I and a top plate II which are in sliding contact are slidably arranged in the concave die insert, clamping grooves are respectively formed in the outer end surfaces of the top plate I and the top plate II, the top surfaces of the top plate I and the top plate II are parallel and level and extend above the concave template, the height from the bottom surface of the top plate II to the lower padding plate is greater than that from the bottom surface of the top plate I to the lower padding plate, and a lower spring I and a lower spring II are arranged in the base, the top parts of the lower spring I and the lower spring II are respectively connected with a lower force transmission column I and a lower force transmission column II, the other ends of the lower force transmission column I and the lower force transmission column II are respectively fixedly arranged on the bottom surfaces of the top plate I and the top plate II, guide grooves positioned on the left side and the right side of the female die insert are arranged in the female die plate, cushion blocks are respectively fixedly arranged at the bottoms of the two guide grooves, sliding blocks which are slidably arranged in the guide grooves are respectively supported on the top surfaces of the two cushion blocks, clamping strips are fixedly arranged on the inner side surfaces of the sliding blocks, the clamping strips are arranged below the clamping grooves, tapered holes are respectively formed in the bottom surfaces of the two sliding blocks, two vertical springs which respectively correspond to the tapered holes are arranged in the lower cushion plate, pins are connected with the top parts of the vertical springs and penetrate through the cushion blocks, a conical head is fixedly arranged on the extending end, the conical head is embedded into the conical hole under the elasticity of the vertical spring, and an inner inclined surface and an outer inclined surface are respectively arranged on the inner side end and the outer side end of the sliding block;

an upper spring I and an upper spring II are arranged in the upper support, the bottoms of the upper spring I and the upper spring II are respectively connected with an upper force transmission column I and an upper force transmission column II, the bottoms of the upper force transmission column I and the upper force transmission column II are respectively fixedly connected with a depth guiding convex die I and a depth guiding convex die II, the two depth guiding convex dies sequentially penetrate through an upper backing plate, a fixing plate, a limiting plate and a discharging plate, the depth guiding convex die I and the depth guiding convex die II are respectively arranged right above a top plate I and a top plate II, two wedge blocks positioned on the outer side of the depth guiding convex die are fixedly arranged on the upper backing plate, the wedge blocks sequentially penetrate through the fixing plate, the limiting plate and the discharging plate, a wedge surface is arranged on an extending end, the two wedge surfaces are respectively positioned right above two outer inclined surfaces, two stop blocks are fixedly arranged on the limiting plate, the two stop blocks are positioned on the outer side of the concave die insert and between the two slide blocks, and the stop blocks penetrate through the discharging plate, and the outer end face of the extension end is provided with a groove which is arranged below the wedge-shaped face, and the stop block is arranged on the front side of the clamping strip.

The bottom surface of the fixing plate is provided with an upper blind hole, the top surface of the limiting plate is provided with an upper blind hole, one end of the extension spring is fixedly arranged at the hole bottom of the upper blind hole, and the other end of the extension spring is fixedly arranged at the hole bottom of the lower blind hole.

Two lower guide holes are formed in the lower backing plate and communicated with a cavity of the female die insert, and the lower force transmission column I and the lower force transmission column II are slidably mounted in the two lower guide holes respectively.

Two upper guide holes are slidably mounted in the upper base plate, and the upper force transmission column I and the upper force transmission column II are slidably mounted in the two upper guide holes respectively.

A guide hole is formed in the cushion block, and the pin is slidably mounted in the guide hole.

The die insert is characterized in that the left end part and the right end part of the die insert are provided with radial holes communicated with a cavity of the die insert, the two radial holes are arranged below the clamping grooves, and the free ends of the two clamping strips are slidably arranged in the two radial holes respectively.

The method for forming the step-shaped product by the die comprises the following steps:

s1, connecting the upper support to a punching head of the punching machine by a worker; a worker horizontally places the thin plate on the top surface formed by splicing the top plate I and the top plate II;

s2, controlling the punching head to move downwards by a worker, driving the upper support to move downwards by the punching head, driving the upper backing plate, the fixing plate, the extension spring, the limiting plate, the discharging plate, the stop block, the deep drawing male die I, the deep drawing male die II and the wedge block to move downwards synchronously, when the die is in a critical die closing state, the discharging plate is just pressed on the top surface of the female die plate, the bottom surfaces of the deep drawing male die I and the deep drawing male die II press the thin plate on a plane formed by the two top plates, and simultaneously the wedge surfaces of the two wedge blocks are respectively contacted with the outer inclined surfaces of the two sliding blocks;

s3, moving the upper support downwards relative to the static discharge plate, the limit plate and the stop block along with the continuous downward movement of the punching head, the upper support driving the upper backing plate, the fixed plate, the deep drawing convex die I, the deep drawing convex die II and the wedge block to move downwards synchronously, meanwhile, the tension spring being compressed by the fixed plate, the wedge block pushing the slide block to move towards the groove direction of the corresponding stop block in the downward movement process of the wedge block, after the slide block is separated from the conical head, the slide block driving the clamping strip to move towards the direction of the concave die insert, meanwhile, in the downward movement process of the deep drawing convex die, the thin plate is clamped between the deep drawing convex die and the top plate to move downwards, a first step is firstly formed in the cavity of the concave die insert, then a second step is formed on the basis of the first step, when the deep drawing convex die is in the downward movement state, a finished product with the free end of the clamping strip on the left side just embedded in the clamping groove of the top plate I, the free end of the clamping strip on the right side is just embedded into the clamping groove of the top plate II, and the inner inclined plane of the sliding block is just embedded into the groove of the corresponding stop block;

s4, taking the finished product step product, controlling the punch head of the punch to move upwards, driving the upper support to move upwards relative to the static discharging plate by the punch head, driving the upper backing plate, the fixing plate, the wedge block, the stretching spring, the deep drawing convex die I and the deep drawing convex die II to move upwards synchronously, driving the limiting plate to move upwards by the stretching spring along with the continuous movement of the upper support after the deep drawing convex die I, the deep drawing convex die II and the stretching spring are reset, driving the discharging plate and the stop block to move upwards by the limiting plate, driving the sliding block to move towards the conical head direction by the stop block under the matching of the groove of the stop block and the inner inclined surface of the sliding block in the upward movement process, driving the clamping strip to move towards the outer side by the sliding block, gradually moving the clamping strip out from the clamping groove, after the clamping strip is completely separated from the clamping groove, pushing the top plate I and the top plate II upwards under the elastic force of the lower spring, and ejecting the finished product step product from the concave die by the two top plates, thereby facilitating the workers to take materials;

and S5, when the stop block is completely separated from the slide block, the slide block is reset, and the conical head of the pin is embedded into the conical hole of the slide block so as to realize the fixation of the slide block.

The invention has the following advantages: the invention has compact structure, improved molding quality, high automation degree, and can prevent the bottom of the step-shaped product from deforming without subsequent leveling processing.

Drawings

FIG. 1 is a schematic structural view of a stepped product;

FIG. 2 is a schematic structural view of the present invention in an open mold state;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is a schematic structural diagram of the present invention in a critical mold closing state;

FIG. 5 is a schematic structural view of the present invention in a mold closed state;

FIG. 6 is an enlarged view of a portion II of FIG. 5;

FIG. 7 is a schematic structural view of a slider;

FIG. 8 is a schematic structural view of a stopper;

FIG. 9 is a schematic view of the pin construction;

in the figure, 1-upper support, 2-upper cushion plate, 3-fixing plate, 4-limiting plate, 5-stripper plate, 6-gap, 7-extension spring, 8-base, 9-lower cushion plate, 10-concave template, 11-concave mold insert, 12-top plate I, 13-top plate II, 14-clamping groove, 15-lower spring I, 16-lower spring II, 17-lower force transmission column I, 18-lower force transmission column II, 19-guide groove, 20-cushion block, 21-slide block, 22-clamping strip, 23-conical hole, 24-vertical spring, 25-pin, 26-conical head, 27-inner inclined surface, 28-outer inclined surface, 29-upper spring I, 30-upper spring II, 31-upper force transmission column I, 32-upper force transmission column II, 33-a depth drawing convex die I, 34-a depth drawing convex die II, 35-a wedge block, 36-a wedge surface, 37-a stop, 38-a groove, 39-a radial hole, 40-a first step and 41-a second step.

Detailed Description

The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following:

as shown in fig. 1 to 9, a step-type product forming mold comprises an upper mold and a lower mold, wherein the upper mold comprises an upper support 1, an upper padding plate 2 and a fixing plate 3 which are sequentially and fixedly arranged on the bottom surface of the upper support 1, a limiting plate 4 and a discharging plate 5 which are fixedly integrated are sequentially arranged below the fixing plate 3, a gap 6 is reserved between the limiting plate 4 and the fixing plate 3, a tension spring 7 is fixedly arranged between the limiting plate 4 and the fixing plate 3, the lower mold comprises a base 8, a lower padding plate 9 and a concave template 10 are sequentially and fixedly arranged on the top surface of the base 8, a concave mold insert 11 is fixedly arranged in the concave template 10, a top plate I12 and a top plate II13 which are in sliding contact with each other are slidably arranged in the concave mold insert 11, clamping grooves 14 are respectively arranged on the outer end surfaces of a top plate I12 and a top plate II13, the top surfaces of the top plate I12 and the top plate II13 are parallel and level with each other and extend above the concave template 10, the bottom surface of the top plate II13 is higher than the bottom surface of the lower padding plate 9 than the bottom surface of the top plate I12, a lower spring I15 and a lower spring II16 are arranged in the base 8, the tops of the lower spring I15 and the lower spring II16 are respectively connected with a lower force transmission column I17 and a lower force transmission column II18, the other ends of the lower force transmission column I17 and the lower force transmission column II18 are respectively and fixedly arranged on the bottom surfaces of a top plate I12 and a top plate II13, a guide groove 19 positioned on the left side and the right side of a concave die insert 11 is arranged in the concave die plate 10, cushion blocks 20 are respectively and fixedly arranged at the bottoms of the two guide grooves 19, sliding blocks 21 slidably arranged in the guide grooves 19 are respectively supported on the top surfaces of the two cushion blocks 20, a clamping strip 22 is fixedly arranged on the inner side surface of each sliding block 21, the clamping strip 22 is arranged below the clamping groove 14, tapered holes 23 are respectively arranged on the bottom surfaces of the two sliding blocks 21, two vertical springs 24 respectively corresponding to the tapered holes 23 are respectively arranged in the lower cushion plate 9, a pin 25 is connected with the top of each vertical spring 24, the pin 25 penetrates through the cushion block 20, and a tapered head 26 is fixedly arranged on the extending end, the tapered head 26 is inserted into the tapered hole 23 by the elastic force of the vertical spring 24, and the inner end and the outer end of the slider 21 are respectively provided with an inner inclined surface 27 and an outer inclined surface 28. The left end portion and the right end portion of the female die insert 11 are provided with radial holes 39 communicated with the cavity of the female die insert, the two radial holes 39 are arranged below the clamping groove 14, and the free ends of the two clamping strips 22 are slidably arranged in the two radial holes 39 respectively.

As shown in fig. 1 to 9, an upper spring I29 and an upper spring II30 are arranged in the upper holder 1, the bottoms of the upper spring I29 and the upper spring II30 are respectively connected with an upper force transmission column I31 and an upper force transmission column II32, the bottoms of the upper force transmission column I31 and the upper force transmission column II32 are respectively and fixedly connected with a deep drawing punch I33 and a deep drawing punch II34, the two deep drawing punches sequentially penetrate through the upper backing plate 2, the fixing plate 3, the limiting plate 4 and the discharging plate 5, the deep drawing punch I33 and the deep drawing punch II34 are respectively arranged right above the top plate I12 and the top plate II13, two wedge blocks 35 located outside the deep drawing punch are fixedly arranged on the upper backing plate 2, the wedge blocks 35 sequentially penetrate through the fixing plate 3, the limiting plate 4 and the discharging plate 5, a wedge face 36 is arranged on the extending end, the two wedge faces 36 are respectively located right above the two outer inclined faces 28, two stoppers 37 are fixedly arranged on the limiting plate 4, the two stoppers 37 are located outside the insert 11 and located between the two concave dies 21, the stopper 37 is disposed through the discharging plate 5, and a groove 38 is disposed on an outer end surface of the extending end, the groove 38 is disposed below the wedge surface 36, and the stopper 37 is disposed on a front side of the clamping strip 22.

The bottom surface of the fixed plate 3 is provided with an upper blind hole, the top surface of the limiting plate 4 is provided with an upper blind hole, one end of the extension spring 7 is fixedly arranged at the hole bottom of the upper blind hole, and the other end of the extension spring is fixedly arranged at the hole bottom of the lower blind hole. Two lower guide holes are formed in the lower backing plate 9 and are communicated with a cavity of the female die insert 11, and the lower force transmission column I17 and the lower force transmission column II18 are slidably mounted in the two lower guide holes respectively. Two upper guide holes are arranged in the upper backing plate 2 in a sliding mode, and the upper force transmission column I31 and the upper force transmission column II32 are arranged in the two upper guide holes in a sliding mode respectively. A guide hole is formed in the cushion block 20, and the pin 25 is slidably mounted in the guide hole.

s1, connecting the upper support 1 to a punching head of a punch press by a worker; a worker places the thin plate on the top surface formed by splicing the top plate I12 and the top plate II 13;

s2, a worker controls the punch head to move downwards, the punch head drives the upper support 1 to move downwards, the upper support 1 drives the upper cushion plate 2, the fixing plate 3, the extension spring 7, the limiting plate 4, the discharging plate 5, the stop block 37, the deep drawing male die I33, the deep drawing male die II34 and the wedge blocks 35 to move downwards synchronously, when the die is in a critical die closing state, as shown in figure 4, the discharging plate 5 is just pressed on the top surface of the concave die plate 10, meanwhile, the bottom surfaces of the deep drawing male die I33 and the deep drawing male die II34 press the thin plate on a plane formed by the two top plates, and simultaneously, the wedge surfaces 36 of the two wedge blocks 35 are respectively contacted with the outer inclined surfaces 28 of the two slide blocks 21;

s3, with the continuous downward movement of the punching head, the upper support 1 moves downward relative to the static discharging plate 5, the limiting plate 4 and the stop block 37, the upper support 1 drives the upper backing plate 2, the fixing plate 3, the deep drawing punch I33, the deep drawing punch II34 and the wedge-shaped block 35 to move downward synchronously, meanwhile, the tension spring 7 is compressed by the fixing plate 3, in the downward movement process of the wedge-shaped block 35, the wedge-shaped block 35 pushes the slide block 21 to move towards the groove 38 direction of the corresponding stop block 37, after the slide block 21 is separated from the conical head 26, the slide block 21 drives the clamping strip 22 to move towards the die insert 11 direction, meanwhile, in the downward movement process of the deep drawing punch, the thin plate is clamped between the deep drawing punch and the top plate to move downward, a first step 40 is formed in the cavity of the die insert 11, then a second step 41 is formed on the basis of the first step 40, and when the deep drawing punch is in the closed state, as shown in figures 5-6, a finished product step-shaped product can be formed, meanwhile, the free end of the clamping strip 22 positioned on the left side is just embedded into the clamping groove 14 of the top plate I12, the free end of the clamping strip 22 positioned on the right side is just embedded into the clamping groove 14 of the top plate II13, and meanwhile, the inner inclined surface 27 of the sliding block 21 is just embedded into the groove 38 of the corresponding stop block 37;

s4, material taking of a finished product step type product, upward movement of a punching head of a punch press is controlled, the punching head drives an upper support 1 to move upward relative to a static discharging plate 5, the upper support 1 drives an upper cushion plate 2, a fixing plate 3, a wedge-shaped block 35, an extension spring 7, a deep drawing convex die I33 and a deep drawing convex die II34 to synchronously move upward, along with the continuous movement of the upper support 1, after the deep drawing convex die I33, the deep drawing convex die II34 and the extension spring 7 are reset, the extension spring 7 drives a limiting plate 4 to move upward subsequently, the limiting plate 4 drives the discharging plate 5 and a stop dog 37 to move upward, in the upward movement process of the stop dog 37, a groove 38 of the stop dog 37 is matched with an inner inclined plane 27 of a slide block 21, the slide block 37 pushes the slide block 21 to move towards the direction of a conical head 26, the slide block 21 drives a clamping strip 22 to move outwards, the clamping strip 22 is gradually moved out of a clamping groove 14, and after the clamping strip 22 is completely separated from the clamping groove 14, the top plate I12 and the top plate II13 are pushed upwards under the elastic force of a lower spring, the two top plates push out the finished step-shaped product from the concave die insert 11, so that the material taking by workers is facilitated;

and S5, when the stop 37 is completely separated from the slide block 21, the slide block 21 is reset, and the tapered head 26 of the pin 25 is embedded into the tapered hole 23 of the slide block 21, so that the slide block 21 is fixed.

In the material taking process of the step S4, when the deep drawing male die I33 and the deep drawing male die II34 move upward synchronously, because the left-side clip strip 22 is embedded in the slot 14 of the top plate I12, and the right-side clip strip 22 is embedded in the slot 14 of the top plate II13, neither the top plate I12 nor the top plate II13 can move upward under the elastic restoring force of the lower spring I15 and the lower spring II16, so that the product is ensured to be always located on the two top plates, and at the same time, the two top plates can not apply pressure to the bottom surface of the product, only when the two deep drawing male dies are reset, and the discharging plate 5 drives the stopper 37 to move upward, the clip strip 22 is driven to move out of the slot 14, so that the forming die effectively avoids the bottom of the step-shaped product from being deformed by the top plate, thereby greatly improving the processing quality of the step-shaped product, and requiring no subsequent leveling processing.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a step type product forming die, it includes mould and lower mould, go up the mould including last support (1), set firmly upper padding plate (2) and fixed plate (3) on last support (1) bottom surface in order, the below of fixed plate (3) is provided with in order and sets firmly limiting plate (4) and stripper (5) in an organic whole, leaves clearance (6) between limiting plate (4) and fixed plate (3), has set firmly extension spring (7) between limiting plate (4) and fixed plate (3), the lower mould includes base (8), set firmly lower padding plate (9) and cavity die board (10) on the top surface of base (8) in order, cavity die board (10) internal stability has die mold insert (11), its characterized in that: a top plate I (12) and a top plate II (13) which are in sliding contact are arranged in the female die insert (11) in a sliding manner, clamping grooves (14) are formed in the outer end faces of the top plate I (12) and the top face of the top plate II (13) in a flush manner and extend above the female die plate (10), the height of the bottom surface of the top plate II (13) away from the lower backing plate (9) is larger than that of the bottom surface of the top plate I (12) away from the lower backing plate (9), a lower spring I (15) and a lower spring II (16) are arranged in the base (8), the tops of the lower spring I (15) and the lower spring II (16) are respectively connected with a lower force transmission column I (17) and a lower force transmission column II (18), the other ends of the lower force transmission column I (17) and the lower force transmission column II (18) are respectively arranged on the bottom surfaces of the top plate I (12) and the top plate II (13), a guide groove (19) positioned on the left side and the right side of the female die insert (11) is formed in the female die insert (10), cushion blocks (20) are fixedly arranged at the bottoms of the two guide grooves (19), sliding blocks (21) which are slidably arranged in the guide grooves (19) are supported on the top surfaces of the two cushion blocks (20), clamping strips (22) are fixedly arranged on the inner side surfaces of the sliding blocks (21), the clamping strips (22) are arranged below the clamping grooves (14), tapered holes (23) are formed in the bottom surfaces of the two sliding blocks (21), two vertical springs (24) which correspond to the tapered holes (23) are arranged in the lower cushion plate (9), pins (25) are connected to the tops of the vertical springs (24), and the pins (25) penetrate through the cushion blocks (20), and the extending end is fixedly provided with a conical head (26), the conical head (26) is embedded into the conical hole (23) under the elastic force of the vertical spring (24), an inner inclined plane (27) and an outer inclined plane (28) are respectively arranged at the inner side end and the outer side end of the sliding block (21);

an upper spring I (29) and an upper spring II (30) are arranged in the upper support (1), the bottoms of the upper spring I (29) and the upper spring II (30) are respectively connected with an upper force transmission column I (31) and an upper force transmission column II (32), the bottoms of the upper force transmission column I (31) and the upper force transmission column II (32) are respectively fixedly connected with a deep drawing convex die I (33) and a deep drawing convex die II (34), the two deep drawing convex dies sequentially penetrate through the upper backing plate (2), the fixed plate (3), the limiting plate (4) and the discharging plate (5), the deep drawing convex die I (33) and the deep drawing convex die II (34) are respectively arranged right above the top plate I (12) and the top plate II (13), the upper backing plate (2) is fixedly provided with two wedge blocks (35) positioned outside the deep drawing convex dies, the wedge blocks (35) sequentially penetrate through the fixed plate (3), the limiting plate (4) and the discharging plate (5), and the extending end is provided with a wedge face (36), two wedge faces (36) are located two outer inclined planes (28) directly over respectively, two dogs (37) have set firmly on limiting plate (4), and two dogs (37) are located the outside of die mold insert (11) and are located between two sliders (21), and dog (37) run through stripper (5) and set up, and are provided with slot (38) on the outer terminal surface of extension end, and slot (38) set up in the below of wedge face (36), and dog (37) set up in the front side of card strip (22).

2. The step type product molding die of claim 1, wherein: the bottom surface of the fixing plate (3) is provided with an upper blind hole, the top surface of the limiting plate (4) is provided with an upper blind hole, one end of the extension spring (7) is fixedly arranged at the hole bottom of the upper blind hole, and the other end of the extension spring is fixedly arranged at the hole bottom of the lower blind hole.

3. The step type product molding die of claim 1, wherein: two lower guide holes are formed in the lower backing plate (9), the two lower guide holes are communicated with a cavity of the female die insert (11), and the lower force transmission column I (17) and the lower force transmission column II (18) are respectively installed in the two lower guide holes in a sliding mode.

4. The step type product molding die of claim 1, wherein: two upper guide holes are arranged in the upper backing plate (2) in a sliding mode, and the upper force transmission column I (31) and the upper force transmission column II (32) are arranged in the two upper guide holes in a sliding mode respectively.

5. The step type product molding die of claim 1, wherein: a guide hole is formed in the cushion block (20), and the pin (25) is slidably mounted in the guide hole.

6. The step type product molding die of claim 1, wherein: radial holes (39) communicated with the cavity of the female die insert (11) are formed in the left end portion and the right end portion of the female die insert, the two radial holes (39) are formed in the lower portion of the clamping groove (14), and the free ends of the two clamping strips (22) are slidably mounted in the two radial holes (39) respectively.

7. The method for molding a stepped product with a mold according to any one of claims 1 to 6, wherein: it comprises the following steps:

s1, connecting the upper support (1) to a punching head of a punch press by a worker; a worker horizontally places the thin plate on the top surface formed by splicing the top plate I (12) and the top plate II (13);

s2, a worker controls a punching head to move downwards, the punching head drives an upper support (1) to move downwards, the upper support (1) drives an upper backing plate (2), a fixing plate (3), a tension spring (7), a limiting plate (4), a discharging plate (5), a stop block (37), a deep drawing male die I (33), a deep drawing male die II (34) and a wedge block (35) to move downwards synchronously, when the die is in a critical die closing state, the discharging plate (5) is just pressed on the top surface of a female die plate (10), simultaneously, the bottom surfaces of the deep drawing male die I (33) and the deep drawing male die II (34) press a thin plate on a plane formed by two top plates, and simultaneously, wedge surfaces (36) of the two wedge blocks (35) are respectively contacted with outer inclined surfaces (28) of the two sliding blocks (21);

s3, moving downwards along with the continuous downward movement of the punching head, enabling an upper support (1) to move downwards relative to a static discharging plate (5), a limiting plate (4) and a stop block (37), enabling the upper support (1) to drive an upper backing plate (2), a fixing plate (3), a deep drawing convex die I (33), a deep drawing convex die II (34) and a wedge block (35) to move downwards synchronously, enabling a tension spring (7) to be compressed by the fixing plate (3), enabling the wedge block (35) to push a sliding block (21) to move towards a groove (38) of the corresponding stop block (37) in the downward movement process of the wedge block (35), enabling the sliding block (21) to drive a clamping strip (22) to move towards a concave die insert (11) after the sliding block (21) is separated from a conical head (26), enabling a thin plate clamp to move downwards between the deep drawing convex die and a top plate in the downward movement process of the deep drawing convex die insert, and forming a first step (40) in a cavity of the concave die insert (11), then, a second step (41) is formed on the basis of the first step (40), when the mold is closed, a finished product stepped product can be formed, meanwhile, the free end of the clamping strip (22) on the left side is just embedded into the clamping groove (14) of the top plate I (12), the free end of the clamping strip (22) on the right side is just embedded into the clamping groove (14) of the top plate II (13), and meanwhile, the inner inclined surface (27) of the sliding block (21) is just embedded into the groove (38) of the corresponding stop block (37);

s4, taking a finished product step-shaped product, controlling a punching head of a punch press to move upwards, driving an upper support (1) to move upwards relative to a static discharging plate (5) by the punching head, driving an upper backing plate (2), a fixing plate (3), a wedge-shaped block (35), an extension spring (7), a deep drawing male die I (33) and a deep drawing male die II (34) to move upwards synchronously by the upper support (1), driving a limiting plate (4) to move upwards subsequently along with the continuous movement of the upper support (1) when the deep drawing male die I (33), the deep drawing male die II (34) and the extension spring (7) are reset, driving the limiting plate (4) by the extension spring (7), driving the discharging plate (5) and a stop block (37) to move upwards by the stop block (37) in the upward movement process, matching a groove (38) of the stop block (37) with an inner inclined surface (27) of the sliding block (21), and driving the sliding block (21) to move towards the direction of the conical head (26), the sliding block (21) drives the clamping strip (22) to move towards the outer side, the clamping strip (22) is gradually moved out of the clamping groove (14), after the clamping strip (22) is completely separated from the clamping groove (14), the top plate I (12) and the top plate II (13) are jacked up under the elastic force of the lower spring, and the two top plates eject the finished product step-shaped product out of the concave die insert (11), so that a worker can conveniently take the product;

and S5, when the stop block (37) is completely separated from the slide block (21), the slide block (21) is reset, and the conical head (26) of the pin (25) is embedded into the conical hole (23) of the slide block (21) to realize the fixation of the slide block (21).