CN111112532B - Forging and pressing die - Google Patents

Forging and pressing die Download PDF

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Publication number
CN111112532B
CN111112532B CN201911347932.2A CN201911347932A CN111112532B CN 111112532 B CN111112532 B CN 111112532B CN 201911347932 A CN201911347932 A CN 201911347932A CN 111112532 B CN111112532 B CN 111112532B
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die
hole
groove
cavity
forging
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CN111112532A (en
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张太萍
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North China University of Water Resources and Electric Power
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North China University of Water Resources and Electric Power
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/08Accessories for handling work or tools
    • B21J13/14Ejecting devices

Abstract

The invention relates to a forging die, which comprises an upper die base, wherein a guide sleeve is arranged on the bottom surface of the upper die base, a guide pillar is arranged in the guide sleeve in a penetrating manner and fixed on the lower die base, a through hole is formed in the center of the lower die base, a push rod is movably inserted in the through hole, the forging die further comprises a fixing plate, an upper combined die, a lower combined die and an ejection device, the top surface of the lower die base is provided with the fixing plate, the upper combined die comprises an upper outer die, an upper inner die and an upper die core, the upper die core is a combined body formed by an upper plate body and a round rod, the combined body is arranged in a second upper groove of the upper inner die, the bottom surface of the upper plate body is provided with a frustum-shaped hole, the lower end of the round rod extends out of a first through hole and is arranged in the frustum-shaped hole, the lower combined die comprises a lower outer die, a lower inner die and a lower, the inner wall of the die cavity is easy to crack at the sudden change position, and the forge piece is easy to deform during unloading.

Description

Forging and pressing die
Technical Field
The invention relates to the technical field of forging, in particular to a forging die.
Background
The forging die is a die used in a forging process, and a raw material is plastically deformed in the forging die by an external force, thereby obtaining a part of a desired shape and size.
The utility model discloses a closed forging and pressing mould of utility model patent of grant publication number CN207508191U, its main technical scheme is: the upper punch is connected with the upper punch, the upper punch is connected with the lower punch, the upper punch and the lower punch are both pressed into the die cavity of the lower die, the clearance between the upper punch and the die cavity is small, and the upper punch is just pressed into the die cavity, so that the forging piece has the advantage that no flash is formed; however, when the die cavity of the forging die is in a closed state, the volume of the die cavity is constant, the volume of the blank has deviation, when the volume of part of the blank is larger than the volume of the die cavity, the size deviation of the forging is overlarge, the precision of the forging is influenced, meanwhile, in the forging process, the die cavity is subjected to large impact force, the die cavity is easy to generate plastic deformation, the inner wall mutation position of the die cavity is easy to crack, and the forging is easy to deform during unloading.
Disclosure of Invention
The invention provides a forging die, which aims to solve the problems that in the prior art, the size deviation of a forging piece is too large, a die cavity is easy to generate plastic deformation, the inner wall mutation position of the die cavity is easy to crack, and the forging piece is easy to deform during unloading.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a forging mould comprises a horizontal plate type upper mould base, wherein a vertical guide sleeve is arranged on the bottom surface of the upper mould base, a guide pillar penetrates through the guide sleeve, the bottom of the guide pillar is fixed on the horizontal plate type lower mould base, a through hole is formed in the center of the lower mould base, a push rod penetrates through the through hole movably, and the forging mould further comprises a fixing plate, an upper combined mould, a lower combined mould and an ejection device;
the left side and the right side of the top surface of the lower die base are respectively provided with a fixing plate arranged outside the through hole, and the fixing plates are vertical plate bodies arranged on the inner sides of the guide pillars;
the upper combined die comprises an upper outer die, an upper inner die and an upper die core, wherein the upper outer die is a block body of which the bottom surface is provided with a first upper groove, the upper outer die is fixed on the bottom surface of an upper die holder, the side wall and the upper wall of the first upper groove are respectively provided with a plurality of first bulges, the upper inner die is a block body of which the bottom surface is provided with a second upper groove, the upper inner die is arranged in the first upper groove and is in interference fit with the first upper groove, the outer side surface and the top surface of the upper inner die are respectively provided with a first groove body in interference fit with the first bulges, the upper die core is a combination body consisting of an upper plate body with a first through hole inside and a round rod with the first through hole in interference fit, the combination body is arranged in the second upper groove and is in interference fit with the second upper groove, the bottom surface of the upper plate body is provided with a frustum-shaped hole which is arranged below the first through hole and is communicated with, the cavity between the periphery of the lower end of the round rod and the frustum-shaped hole is an upper cavity, and a plurality of positioning grooves are formed in the bottom surface of the upper plate body close to the upper cavity;
the lower combined die comprises a lower outer die, a lower inner die and a lower die core, wherein the lower outer die is a block body of which the top surface is provided with a first lower groove, the lower outer die is fixed on the top surfaces of a left fixing plate and a right fixing plate, the side wall and the lower wall of the first lower groove are respectively provided with a plurality of second bulges, the lower inner die is a block body of which the top surface is provided with a second lower groove, the lower inner die is arranged in the first lower groove and is in interference fit with the first lower groove, the outer side surface and the bottom surface of the lower inner die are respectively provided with a second groove body in interference fit with the second bulges, the lower die core is a plate body of which a second through hole and a third through hole are arranged inside, the third through hole is arranged outside the second through hole, the second through hole downwards sequentially penetrates through the bottoms of the lower inner die and the lower outer die, the lower die core is arranged in the second lower groove and is in interference fit with the second lower groove, an inverted cone platform is arranged above the second through, a plurality of downward sunken excess material grooves are formed in the top surface of the lower die core close to the inverted frustum-shaped hole, the excess material grooves vertically correspond to the third through hole, the top surface of the lower die core between the excess material grooves and the inverted frustum-shaped hole is sunken downwards to form connecting grooves, the excess material grooves are communicated with the inverted frustum-shaped hole through the connecting grooves, and a third bulge arranged in the positioning groove is formed in the top surface of the lower die core close to the excess material grooves;
ejecting device sets up in the ejector pin top and lies in between two fixed plates of controlling, and ejecting device includes push pedal, lower punch, thimble and spring, the push pedal is arranged in on the die holder and is corresponded from top to bottom with the ejector pin, is fixed with lower punch and thimble on the push pedal, and lower punch and thimble all are the body of rod of vertical setting, and it is downthehole that the frustum of the falling cone is arranged in to stretch out the second through-hole in the top of lower punch, and the spring of arranging in on the push pedal is worn to the lower punch periphery of second through-hole below, and the cavity between lower punch upper end periphery and the frustum of the falling cone hole is lower die cavity, and the thimble passes the third through-hole.
Further, first arch and second arch are rectangular shape, and first arch and second arch all are horizontal linear arrangement, and first bellied length on the lateral wall of first upper groove extends to the bottom of the lateral wall from the lateral wall top downwards, and first bellied length on the upper wall of first upper groove extends to the upper wall rear end from the upper wall front end backward, and the bellied length of second on the lateral wall of first lower groove extends to the bottom of the lateral wall from the lateral wall top downwards, and the bellied length of second on the lower wall of second upper groove extends to the lower wall rear end from the lower wall front end backward.
Furthermore, the bottom surfaces of the upper outer die, the upper inner die and the upper plate body are on the same horizontal plane, and the top surfaces of the lower outer die, the lower inner die and the lower die core are on the same horizontal plane.
Further, the lower cavity corresponds to the upper cavity up and down.
Furthermore, the number of the positioning grooves is at least 2, and a gap is formed between the third protrusion and the positioning grooves.
Furthermore, the number of the surplus troughs is at least 4, and the surplus troughs are trough bodies with arc-shaped sections.
Further, the distance range from the central point of the surplus trough to the top surface of the lower die core is 8-10 mm.
Further, the width of connecting groove equals 1/5 of the width of surplus groove, and the top surface of connecting groove to the top surface range of lower mould core is 1 ~ 2 mm.
Further, when the ejector rod jacks up the push plate, the spring is in a compressed state.
Furthermore, the length of the lower end of the round rod extending out of the first through hole is 1/2-2/3 of the depth of the frustum-shaped hole, and the length of the top end of the lower punch extending out of the second through hole upwards is 1/2-2/3 of the inverted frustum-shaped hole.
Through the technical scheme, the invention has the beneficial effects that:
1. when the volume of the blank is larger than the sum of the volumes of the lower cavity and the upper cavity, the excess material of the blank flows into the excess material groove through the connecting groove in the blank forging process, the size deviation of the produced forged piece is small, and the precision of the forged piece is high; the residual materials generated by the residual material groove and the connecting groove are slightly knocked to be disconnected with the forged piece, so that the residual materials do not need to be removed by machining, and the subsequent processing is less, namely the forged piece produced by the method has small size deviation, high precision and less subsequent processing.
2. Because the upper die core is in interference fit with the second upper groove, the upper inner die is in interference fit with the first upper groove, and both the upper die core and the upper inner die have pre-pressing stress; because the lower die core is in interference fit with the second lower groove, the lower inner die is in interference fit with the first lower groove, and both the lower die core and the lower inner die have pre-pressing stress; i.e. the mould cavity of the invention is not susceptible to plastic deformation.
3. Because the cavity between the periphery of the lower end of the round rod and the frustum-shaped hole is the upper cavity, and the cavity between the periphery of the upper end of the lower punch and the frustum-shaped hole is the lower cavity, namely the position where the inner wall of the upper cavity is subjected to sudden change is composed of the round rod and the upper plate body, and the position where the inner wall of the lower cavity is subjected to sudden change is composed of the lower punch and the lower die core, the stress concentration of the inner wall of the upper cavity and the inner wall of the lower cavity can be prevented from cracking, so that the damage of a die is avoided, and the cavity.
4. When the forged piece needs to be unloaded after being formed, the ejector rod pushes the push plate, so that the lower punch and the ejector pin respectively push the forged piece and the residual material part, the forged piece is uniformly stressed and is not easy to deform, and the forged piece is not easy to deform during unloading.
5. Because second arch and second cell body interference fit, first arch and first cell body interference fit, this structure can increase the prestressing force on last centre form and the centre form down respectively, has improved the anti plastic deformation ability of last die cavity and lower die cavity.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a front (cross-sectional) block diagram of the present invention;
FIG. 3 is a bottom view of the upper segmented mold, guide sleeve and upper die holder of the present invention in combination;
FIG. 4 is a front view of the lower die assembly, guide post, retaining plate, ejector and lower die holder of the present invention in combination;
FIG. 5 is an enlarged schematic view of FIG. 2C;
FIG. 6 is an enlarged schematic view of FIG. 2D;
fig. 7 is an enlarged schematic view of fig. 4E.
The reference numbers in the drawings are as follows: 1 is the upper die base, 2 is the guide pin bushing, 3 is the guide pillar, 4 is the lower die holder, 5 is the fixed plate, 6 is the upper assembling die, 7 is the lower assembling die, 8 is ejecting device, 9 is the ejector pin, 60 is the upper external mold, 61 is the upper internal mold, 62 is the upper die core, 70 is the lower external mold, 71 is the lower internal mold, 72 is the lower die core, 80 is the push pedal, 82 is the lower punch, 83 is the thimble, 84 is the spring, 601 is first arch, 620 is the upper plate body, 621 is the round bar, 622 is the upper die cavity, 623 is the constant head tank, 701 is the second arch, 720 is the surplus silo, 721 is the spread groove, 722 is the third arch, 723 is the lower die cavity.
Detailed Description
The invention is further described with reference to the following figures and detailed description:
as shown in fig. 1-7, a forging mold comprises a horizontal plate type upper mold base 1, a vertical guide sleeve 2 is arranged on the bottom surface of the upper mold base, a guide pillar 3 penetrates through the guide sleeve, the bottom of the guide pillar 3 is fixed on the horizontal plate type lower mold base 4, a through hole is formed in the center of the lower mold base 4, an ejector rod 9 penetrates through the through hole in a movable mode, the forging mold further comprises a fixing plate 5, an upper combined mold 6, a lower combined mold 7 and an ejector device 8, the upper mold base 1 and the lower mold base 4 are both made of No. 45 steel, and the guide pillar 3 and the guide sleeve 2 are guide pillars and guide sleeves of Shenzhen City Hengtongxing technology Limit.
The left side and the right side of the top surface of the lower die seat 4 are respectively provided with a fixing plate 5 arranged outside the through hole, the fixing plate 5 is a vertical plate body arranged on the inner side of the guide pillar 3, and the fixing plate 5 is made of No. 45 steel.
The upper combined die 6 comprises an upper outer die 60, an upper inner die 61 and an upper die core 62, wherein the upper outer die 60 is a block body with a first upper groove on the bottom surface, the upper outer die 60 is fixed on the bottom surface of the upper die holder 1, the side wall and the upper wall of the first upper groove are both provided with a plurality of first bulges 601, the upper inner die 61 is a block body with a second upper groove on the bottom surface, the upper inner die 61 is arranged in the first upper groove and is in interference fit with the first upper groove, the outer side surface and the top surface of the upper inner die 61 are both provided with a first groove body in interference fit with the first bulges 601, the upper die core 62 is a combination body consisting of an upper plate body 620 with a first through hole inside and a round rod 621 with the first through hole in interference fit, the combination body is arranged in the second upper groove and is in interference fit with the second upper groove, a frustum-shaped hole communicated with the first through hole is arranged on the bottom surface of the upper plate body 620, the lower end of the round rod 621 stretches out of the, the cavity between the periphery of the lower end of the round rod 621 and the frustum-shaped hole is an upper cavity 622, a plurality of positioning grooves 623 are formed in the bottom surface of the upper plate body 620 close to the upper cavity, the upper outer die 60 is made of No. 45 steel, and the upper inner die 61, the upper plate body 620 and the round rod 621 are made of die steel H13.
The lower combined die 7 comprises a lower outer die 70, a lower inner die 71 and a lower die core 72, wherein the lower outer die 70 is No. 45 steel, the lower inner die 71 and the lower die core 72 are die steel H13, the lower outer die 70 is a block body with a first lower groove on the top surface, the lower outer die is fixed on the top surfaces of a left fixing plate 5 and a right fixing plate 5, the side wall and the lower wall of the first lower groove are both provided with a plurality of second bulges 701, the lower inner die 71 is a block body with a second lower groove on the top surface, the lower inner die 71 is arranged in the first lower groove and is in interference fit with the first lower groove, the outer side surface and the bottom surface of the lower inner die 71 are both provided with second groove bodies in interference fit with the second bulges 701, the lower die core 72 is a plate body with second through holes and third through holes inside, the third through holes are arranged on the outer sides of the second through holes, the second through holes downwards sequentially penetrate through the bottoms of the, The bottom of the lower outer die 70, the lower die core 72 is arranged in the second lower groove and is in interference fit with the second lower groove, an inverted frustum-shaped hole communicated with the second through hole is formed in the top surface of the lower die core 72 and is arranged above the second through hole, a plurality of downward recessed excess material grooves 720 are formed in the top surface of the lower die core 72 close to the inverted frustum-shaped hole, the excess material grooves 720 correspond to the third through hole up and down, the top surfaces of the lower die core 72 between the excess material grooves 720 and the inverted frustum-shaped hole are recessed downwards to form a connecting groove 721, the excess material grooves 720 are communicated with the inverted frustum-shaped hole through the connecting groove 721, and a third protrusion 722 arranged in the positioning groove 623 is arranged on the top surface of the lower die core 72 close.
The ejection device 8 is arranged above the ejector rod 9 and located between the left fixing plate 5 and the right fixing plate 5, the ejection device 8 comprises a push plate 80, a lower punch 82, an ejector pin 83 and a spring 84, the push plate 80 is made of 45-grade steel, the lower punch 82 is made of SKD11, the ejector pin 83 is an SKD61 ejector pin of Hezhen City Hengtongxing science and technology Limited, the push plate 80 is arranged on the lower die base 4 and vertically corresponds to the ejector rod 9, the lower punch 82 and the ejector pin 83 are fixed on the push plate 80 and are vertically arranged rod bodies, the top end of the lower punch 82 extends upwards to form a second through hole and is arranged in the inverted frustum-shaped hole, the spring 84 arranged on the push plate 80 penetrates through the periphery of the lower punch 82 below the second through hole, a cavity between the periphery of the upper end of the lower punch 82 and the inverted frustum-shaped hole is a lower cavity 723, and the ejector pin 83 penetrates through the.
The first protrusions 601 and the second protrusions 701 are both long strips, the first protrusions 601 and the second protrusions 701 are arranged horizontally and linearly, the length of the first protrusions 601 on the side walls of the first upper grooves extends downwards from the tops of the side walls to the bottoms of the side walls, the length of the first protrusions 601 on the upper walls of the first upper grooves extends backwards from the front ends of the upper walls to the rear ends of the upper walls, the length of the second protrusions 701 on the side walls of the first lower grooves extends downwards from the tops of the side walls to the bottoms of the side walls, and the length of the second protrusions 701 on the lower walls of the second upper grooves extends backwards from the front ends of the lower walls to the rear ends of the lower walls.
The bottom surfaces of the upper outer die 60, the upper inner die 61 and the upper plate body 620 are on the same horizontal plane, and the top surfaces of the lower outer die 70, the lower inner die 71 and the lower die core 72 are on the same horizontal plane.
The lower cavity 723 corresponds to the upper cavity 622 up and down.
The number of the positioning slots 623 is at least 2, and a gap is formed between the third protrusion 722 and the positioning slot.
The number of the surplus troughs 720 is at least 4, and the surplus troughs are trough bodies with arc-shaped sections.
The distance range from the central point of the surplus trough 720 to the top surface of the lower die core 72 is 8-10 mm.
The width of the connecting groove 721 is equal to 1/5 of the width of the surplus trough 720, and the distance range from the top surface of the connecting groove to the top surface of the lower die core 72 is 1-2 mm.
When the ejector rod 9 pushes up the push plate 80, the spring 84 is in a compressed state.
The length of the lower end of the round rod 621 stretching out of the first through hole is 1/2-2/3 of the depth of the frustum-shaped hole, and the length of the top end of the lower punch 82 stretching out of the second through hole is 1/2-2/3 of the inverted frustum-shaped hole.
When the volume of the blank is larger than the sum of the volumes of the lower cavity 723 and the upper cavity 622, the excess material of the blank flows into the excess material groove 720 through the connecting groove 721 in the blank forging process, the size deviation of the produced forged piece is small, and the precision of the forged piece is high; because the excess material part generated by the excess material groove 720 and the connecting groove 721 is slightly knocked to be disconnected with the forging, the excess material does not need to be removed by machining, and the subsequent processing is less, namely the size deviation of the produced forging is small, the precision of the forging is high, and the subsequent processing is less.
Because the upper die core 62 is in interference fit with the second upper groove, the upper inner die 61 is in interference fit with the first upper groove, and both the upper die core 62 and the upper inner die 61 have pre-stress, in the forging process, the blank generates impact force on the upper die cavity 622, and the pre-stress on the upper die core 62 and the upper inner die 61 can offset part of the impact force, thereby protecting the upper die cavity 622 from generating plastic deformation easily; because the lower die core 72 is in interference fit with the second lower groove, the lower inner die 71 is in interference fit with the first lower groove, and both the lower die core 72 and the lower inner die 71 have pre-stress, in the forging process, the blank generates impact force on the lower die cavity 723, and the pre-stress on the lower die core 72 and the lower inner die 71 can offset part of the impact force, thereby protecting the lower die cavity 723 from generating plastic deformation; i.e. the mould cavity of the invention is not susceptible to plastic deformation.
Because the cavity between the periphery of the lower end of the round rod 621 and the frustum-shaped hole is the upper cavity 622, the cavity between the periphery of the upper end of the lower punch 82 and the inverted frustum-shaped hole is the lower cavity 723, namely the position of the inner wall of the upper cavity, which has a sudden change, is composed of the round rod 621 and the upper plate body 620, and the position of the inner wall of the lower cavity, which has a sudden change, is composed of the lower punch 82 and the lower die core 72, stress concentration of the inner wall of the upper cavity and the inner wall of the lower cavity can be avoided from cracking, so that the damage of a die is avoided, and the.
When the forged piece needs to be unloaded after being formed, the ejector rod 9 pushes the push plate 80, so that the lower punch and the ejector pin respectively push the forged piece and the residual material part, the forged piece is uniformly stressed and is not easy to deform, and the forged piece is not easy to deform during unloading.
Due to the interference fit of the second protrusion 701 and the second groove body and the interference fit of the first protrusion 601 and the first groove body, the structure can respectively increase the pre-stress on the upper inner die 61 and the lower inner die 71, and the plastic deformation resistance of the upper cavity 622 and the lower cavity 723 is improved.
The detailed description of the present invention is provided with reference to the accompanying drawings, however, the above description is not intended to limit the present invention, and various equivalent or equivalent modifications or replacements may be made within the technical scope of the present invention within the disclosure range without departing from the spirit of the present invention.

Claims (10)

1. A forging die comprises a horizontal plate type upper die holder (1), wherein a vertical guide sleeve (2) is arranged on the bottom surface of the upper die holder, a guide pillar (3) penetrates through the guide sleeve, the bottom of the guide pillar (3) is fixed on the horizontal plate type lower die holder (4), a through hole is formed in the center of the lower die holder (4), and a push rod (9) movably penetrates through the through hole;
the left side and the right side of the top surface of the lower die seat (4) are respectively provided with a fixing plate (5) arranged outside the through hole, and the fixing plates (5) are vertical plate bodies arranged on the inner sides of the guide pillars (3);
the upper combined die (6) comprises an upper outer die (60), an upper inner die (61) and an upper die core (62), the upper outer die (60) is a block body with a first upper groove on the bottom surface, the upper outer die (60) is fixed on the bottom surface of the upper die base (1), the side wall and the upper wall of the first upper groove are both provided with a plurality of first bulges (601), the upper inner die (61) is a block body with a second upper groove on the bottom surface, the upper inner die (61) is arranged in the first upper groove and is in interference fit with the first upper groove, the outer side surface and the top surface of the upper inner die (61) are both provided with a first groove body in interference fit with the first bulges (601), the upper die core (62) is a combined body formed by an upper plate body (620) with a first through hole inside and a round rod (621) with a first through hole in interference fit, the combined body is arranged in the second upper groove and is in interference fit with the second upper groove, the bottom surface of the upper plate body (620) is provided with a frustum hole communicated with the first through hole, the lower end of the round rod (621) extends out of the first through hole and is arranged in the frustum-shaped hole, a cavity between the periphery of the lower end of the round rod (621) and the frustum-shaped hole is an upper cavity (622), and a plurality of positioning grooves (623) are formed in the bottom surface of the upper plate body (620) close to the upper cavity;
the lower combined die (7) comprises a lower outer die (70), a lower inner die (71) and a lower die core (72), the lower outer die (70) is a block body with a first lower groove on the top surface, the lower outer die is fixed on the top surfaces of a left fixing plate and a right fixing plate (5), a plurality of second protrusions (701) are arranged on the side wall and the lower wall of the first lower groove, the lower inner die (71) is a block body with a second lower groove on the top surface, the lower inner die (71) is arranged in the first lower groove and in interference fit with the first lower groove, second groove bodies in interference fit with the second protrusions (701) are arranged on the outer side and the bottom surface of the lower inner die (71), the lower die core (72) is a plate body with a second through hole and a third through hole inside, the third through hole is arranged on the outer side of the second through hole, the second through hole penetrates through the bottoms of the lower inner die (71) and the lower outer die (70) downwards in sequence, and the, The bottom of the lower outer die (70), the lower die core (72) is arranged in the second lower groove and is in interference fit with the second lower groove, the top surface of the lower die core (72) is provided with an inverted frustum-shaped hole which is arranged above the second through hole and communicated with the second through hole, the top surface of the lower die core (72) close to the inverted frustum-shaped hole is provided with a plurality of downward-recessed surplus tanks (720), the surplus tanks (720) vertically correspond to the third through hole, the top surfaces of the lower die core (72) between the surplus tanks (720) and the inverted frustum-shaped hole are downward recessed to form connecting grooves (721), the surplus tanks (720) are communicated with the inverted frustum-shaped hole through the connecting grooves (721), and the top surface of the lower die core (72) close to the surplus tanks (720) is provided with third protrusions (722) arranged in the positioning grooves (623;
ejecting device (8) set up in ejector pin (9) top and lie in about between two fixed plates (5), ejecting device (8) are including push pedal (80), lower punch (82), thimble (83) and spring (84), push pedal (80) are arranged in on lower die holder (4) and are corresponded from top to bottom with ejector pin (9), be fixed with lower punch (82) and thimble (83) on push pedal (80), lower punch and thimble all are the body of rod of vertical setting, the top of lower punch (82) upwards stretches out the second through-hole and arranges in the frustum shape downthehole, spring (84) on push pedal (80) are arranged in to lower punch (82) periphery below, cavity between lower punch (82) upper end periphery and the frustum shape hole is lower die cavity (723), thimble (83) pass the third through-hole until the bottom surface parallel and level with surplus silo (720).
2. A forging die as claimed in claim 1, wherein the first protrusion (601) and the second protrusion (701) are both elongate, the first protrusion (601) and the second protrusion (701) are both arranged in a horizontal line, the length of the first protrusion (601) on the side wall of the first upper groove extends from the top of the side wall to the bottom of the side wall, the length of the first protrusion (601) on the upper wall of the first upper groove extends from the front end of the upper wall to the rear end of the upper wall, the length of the second protrusion (701) on the side wall of the first lower groove extends from the top of the side wall to the bottom of the side wall, and the length of the second protrusion (701) on the lower wall of the second upper groove extends from the front end of the lower wall to the rear end of the lower wall.
3. A forging die according to claim 1, wherein the bottom surfaces of the upper outer die (60), the upper inner die (61) and the upper plate body (620) are at the same level, and the top surfaces of the lower outer die (70), the lower inner die (71) and the lower die core (72) are at the same level.
4. A forging die as claimed in claim 1, wherein the lower cavity (723) corresponds up and down to the upper cavity (622).
5. A forging die according to claim 1, wherein the number of the positioning grooves (623) is at least 2, and a gap is formed between the third protrusion (722) and the positioning groove.
6. A forging die according to claim 1, wherein the number of the surplus tank (720) is at least 4, and the surplus tank is a tank body with an arc-shaped section.
7. The forging die of claim 6, wherein the distance from the center point of the surplus tank (720) to the top surface of the lower die core (72) is 8-10 mm.
8. A forging die according to claim 7, wherein the width of the connecting slot (721) is equal to 1/5 of the width of the surplus tank (720), and the distance from the top surface of the connecting slot to the top surface of the lower die core (72) is in the range of 1-2 mm.
9. A forging die according to claim 1, wherein the spring (84) is compressed when the ejector pin (9) pushes the push plate (80) upwardly.
10. A forging die according to claim 1, wherein the lower end of the round rod (621) protrudes from the first through hole by 1/2-2/3 of the depth of the frustum-shaped hole, and the top end of the lower punch (82) protrudes upward from the second through hole by 1/2-2/3 of the inverted frustum-shaped hole.
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CN114603975B (en) * 2022-05-16 2022-07-26 江苏逸欣节能科技有限公司 Automatic gluing composite device for producing heat-insulation sandwich board

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CN203764734U (en) * 2014-03-28 2014-08-13 象山搏远智能科技有限公司 Fine-blanking extrusion die of star wheel of clutch
CN209206349U (en) * 2018-12-25 2019-08-06 浙江正昌锻造股份有限公司 A kind of floating occlusion molding machine

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CN201217020Y (en) * 2008-07-02 2009-04-08 万向集团公司 Forward extrusion mould of universal-joint sleeve
CN102430692A (en) * 2011-10-19 2012-05-02 浙江工业大学 Cold precision forging process for bevel gear and mould thereof
CN203764734U (en) * 2014-03-28 2014-08-13 象山搏远智能科技有限公司 Fine-blanking extrusion die of star wheel of clutch
CN209206349U (en) * 2018-12-25 2019-08-06 浙江正昌锻造股份有限公司 A kind of floating occlusion molding machine

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