CN218015210U - Automatic line for forming fence door hinge - Google Patents

Abstract

The utility model belongs to the technical field of forming die, especially, relate to fence door hinge shaping automation line, be equipped with between upper die base and the die holder and punch a hole and cut off station, the station of bending, shaping station and pushing equipment, when upper die base and die holder compound die, punch a hole and cut off station, bend a hole and cut off station and shaping station and carry out punching cut off, bending and stamping forming processing to the blank on the corresponding station respectively simultaneously; after upper die base and die holder die sinking, pushing equipment will punch a hole and cut off the second blank propelling movement on the station to the station of bending and simultaneously will punch a hole and bend the third blank propelling movement on the station to the shaping station, only need once compound die through one set of mould can accomplish multichannel process simultaneously, and push away next process by pushing away material mechanism behind the die sinking, realize automatic continuous production, and is with low costs, take up an area of the space for a short time, degree of automation is high, high production efficiency, and give through feeding mechanism and cut off station automatic feeding that punches a hole, need not artifical manual feeding, make degree of automation higher, efficiency is higher.

Description

Automatic line for forming fence door hinge

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of forming die, especially, relate to fence door hinge shaping automation line.

[ background of the invention ]

In the existing fence door hinge manufacturing production line, for example, the fence door hinge shown in fig. 10 needs to be formed through the processes of blanking, bending, forming and the like, so that the production line for producing the fence door hinge needs to use multiple sets of equipment for multiple punch forming, and has the advantages of high cost, large occupied space and low production efficiency.

[ Utility model ] content

An object of the utility model is to provide a fence door hinge shaping automation line with low costs, occupation space is little, degree of automation is high, production efficiency is high.

The utility model discloses realized by following technical scheme:

the automatic molding line for the fence door hinge comprises an upper die base, a lower die base and a feeding mechanism, wherein a punching and cutting station for punching and cutting a first blank into a second blank, a bending station for bending the second blank into a third blank, a molding station and a pushing mechanism for punching and molding the third blank into a molded part, and a blanking through groove which is arranged on the lower die base and is positioned below the molding station are arranged between the upper die base and the lower die base; after the upper die holder and the lower die holder are opened, the pushing mechanism pushes the second blank on the punching and cutting station to the punching and bending station and simultaneously pushes the third blank on the punching and bending station to the forming station.

According to the automatic molding line for the fence door hinge, the punching and cutting station is provided with a first detection device for detecting that the first blank is in place, the bending station is provided with a second detection device for detecting that the second blank is in place, and the molding station is provided with a third detection device for detecting that the third blank is in place.

The material pushing mechanism comprises a material pushing plate, a first driving device for driving the material pushing plate to move, and a first material pushing part and a second material pushing part which are arranged at one end of the material pushing plate far away from the first driving device, wherein the first material pushing part is arranged opposite to a second blank positioned on the punching and cutting station and used for pushing the second blank to the punching and bending station; the second material pushing part is arranged opposite to the third blank positioned on the punching and bending station and used for pushing the third blank to the forming station.

As above the fence door hinge shaping automation line, the shaping station includes:

the two molding installation seats are oppositely arranged below the upper die base;

the forming sliding blocks are movably arranged on the forming mounting seats and are matched with the forming mounting seat wedges, so that the two forming sliding blocks move towards or away from each other when moving upwards or downwards relative to the corresponding forming mounting seats, and hinge forming surfaces are arranged at the opposite ends of the two forming sliding blocks;

the molding chute is arranged on the lower die base corresponding to the molding mounting base;

the forming die core group is used for receiving the blank pushed from the stamping and bending station, and the outer wall of the forming die core group is matched with the hinge forming surface;

the resetting elastic element is arranged between the forming sliding blocks and the upper die base, the resetting elastic element is compressed when the forming sliding blocks move upwards relative to the corresponding forming mounting bases, and when the die is opened, the resetting elastic element resets to push the forming sliding blocks to move downwards relative to the corresponding forming mounting bases and enable the two forming sliding blocks to move back to back and leave the forming die core group;

when the upper die base moves downwards to be matched with the lower die base, the two forming installation bases gradually extend into the corresponding forming sliding grooves, and the two forming sliding blocks are blocked by the lower die base and move upwards relative to the forming installation bases, so that the two forming sliding blocks move oppositely to form a forming cavity for forming the fence door hinge by the two hinge forming surfaces and the forming die core group.

As the automatic molding line for the fence door hinge, the hinge molding surface comprises a first arc section molding surface, a first straight section molding surface, a second arc section molding surface and a second straight section molding surface which are sequentially connected, the molding core group comprises an upper mold core and a lower mold core which are arranged at intervals, the upper mold core is matched with the first arc section molding surface, and the lower mold core is respectively matched with the second arc section molding surface and the second straight section molding surface.

As above the automatic line of fence door hinge shaping, the shaping station still includes:

a mold core mounting plate;

the die core guide frame is arranged on the lower die base, one end of the forming die core group is arranged on the die core mounting plate, and the other end of the forming die core group is movably arranged in the die core guide frame;

and the second driving device is used for driving the die core mounting plate to enable the forming die core group to pass through and extend out of the die core guide frame to receive a third blank or retract into the die core guide frame to enable the formed part to fall into the blanking through groove.

As above the automatic line of fence door hinge shaping, the kick-bending station includes:

the two punching and bending female dies are oppositely arranged below the upper die base, and punching and bending forming surfaces are arranged at the opposite ends of the two punching and bending female dies;

the bending punch is matched with the bending forming surface;

the material pressing rod is in sliding fit with the upper die base, is positioned between the two bending female dies and is positioned above the bending male die;

when the upper die base moves downwards to be matched with the lower die base, the material pressing rod presses the upper surface of the second blank, and the two punching and bending female dies move downwards to be matched with the punching and bending male dies to punch and bend the second blank into a third blank.

According to the automatic molding line for the fence door hinge, the bending female die is provided with the bending roller, the bending roller is located at the lower end of the bending molding surface, and the curved surface of the bending roller is connected with the lower end of the bending molding surface.

As above the automatic line of fence door hinge shaping, the terrace die both ends of punching and bending are equipped with positioning mechanism, positioning mechanism is including locating the location mount pad on the die holder, hinge locate the swing piece that is used for bearing the second blank on the location mount pad, be used for making the swing piece keep the swing elastic component of upwards swing trend, locate the swing locating part that is used for restricting swing piece upwards swing height on the location mount pad and locate the propelling movement locating part that is used for restricting second blank propelling movement distance on the location mount pad.

As the automatic molding line of the fence door hinge, the punching and cutting station comprises a lower template arranged above the lower template, a lower mold insert arranged in the lower template, an upper template arranged below the upper template, and an upper mold punch head arranged on the upper template and matched with the lower mold insert, the lower die insert comprises a cutting die, and a primary punching die and a secondary punching die which are respectively arranged on two sides of the cutting die, and the upper die punch comprises a cutting punch matched with the cutting die, a primary punching punch matched with the primary punching die and a secondary punching punch matched with the secondary punching die.

Compared with the prior art, the utility model discloses there is following advantage:

1. the utility model provides a fence door hinge shaping automation line is equipped with punching cut-off station, punching and bending station, shaping station and pushing equipment between upper die base and die holder, when upper die base and die holder compound die, punching cut-off station, punching and bending station and shaping station punch a hole respectively simultaneously and cut off, punching and bending and stamping forming processing to the blank on the corresponding station; after the upper die holder and the lower die holder are opened, the pushing mechanism pushes a second blank on the punching and cutting station to the punching and bending station and simultaneously pushes a third blank on the punching and bending station to the forming station, a plurality of processes can be completed simultaneously only by one-time die assembly of one set of die, and the second blank is pushed to the next process by the pushing mechanism after the die is opened, so that automatic continuous production is realized, the cost is low, the occupied space is small, the automation degree is high, and the production efficiency is high; in addition, the punching and cutting device further comprises a feeding mechanism, the punching and cutting station can be automatically fed through the feeding mechanism, manual feeding is not needed, and therefore the automation degree is higher and the efficiency is higher;

2. meanwhile, a first detection device for detecting that the first blank is in place is arranged on the punching and cutting station, a second detection device for detecting that the second blank is in place is arranged on the punching and bending station, and a third detection device for detecting that the third blank is in place is arranged on the forming station.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural view of an automated line for forming a fence door hinge according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an automatic molding line of a fence door hinge according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an automatic molding line of a fence door hinge according to an embodiment of the present invention;

FIG. 4 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 3;

FIG. 5 is a cross-sectional view along line B-B of FIG. 4;

FIG. 6 is a cross-sectional view along the line C-C in FIG. 4;

FIG. 7 is a schematic cross-sectional view taken along line D-D of FIG. 4;

fig. 8 is a schematic structural view of a second blank according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a third blank according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a molded part according to an embodiment of the present invention.

[ detailed description ] embodiments

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the terms are used for distinguishing only when they do express the ordinal order in context.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In a specific embodiment, the automatic molding line for the gate hinge shown in fig. 1 to 10 includes an upper die holder 1, a lower die holder 2, and a feeding mechanism 13, where a punching and cutting station 3 for punching and cutting a first blank 100 into a second blank 200, a bending station 4 for bending the second blank 200 into a third blank 300, a molding station 5 for punching and molding the third blank 300 into a molded part 400, a pushing mechanism 6, and a blanking through slot 7 disposed on the lower die holder 2 and located below the molding station 5 are disposed between the upper die holder 1 and the lower die holder 2, and when the upper die holder 1 and the lower die holder 2 are assembled, the punching and cutting station 3, the bending station 4, and the molding station 5 respectively and simultaneously perform punching, cutting, bending, and punching and molding on the blanks on the corresponding stations; after the upper die holder 1 and the lower die holder 2 are opened, the pushing mechanism 6 pushes the second blank 200 on the punching and cutting station 3 to the punching and bending station 4 and simultaneously pushes the third blank 300 on the punching and bending station 4 to the forming station 5. A plurality of processes can be completed simultaneously only by one-time die assembly of one set of die, and the die is pushed to the next process by a pushing mechanism after die opening, so that the cost is low, the occupied space is small, the automation degree is high, and the production efficiency is high. Additionally, the utility model discloses still include feeding mechanism 13, accessible feeding mechanism cuts off 3 automatic feeding at station for punching a hole, need not artifical manual feeding, and degree of automation is higher, and efficiency is higher. Specifically, the feeding mechanism may employ multi-roll nip feeding.

Further, a first detection device 10 for detecting the arrival of the first blank 100 is arranged on the punching and cutting station 3, a second detection device 11 for detecting the arrival of the second blank 200 is arranged on the punching and bending station 4, and a third detection device 12 for detecting the arrival of the third blank 300 is arranged on the forming station 5. It should be noted that the first blank 100 detected by the first detecting device 10 has a punched hole formed by the first punching female die 322 and the first punching punch 342 when the blank is punched and cut in the previous step, specifically, when the first detecting device 10, the second detecting device 11 and the third detecting device 12 detect the blank at the same time, the upper die holder 1 and the lower die holder 2 are closed, so as to ensure that the blank is in place and the first material pushing member 63 and the second material pushing member 64 are pulled out when the mold is closed; the first detection device 10, the second detection device 11 and the third detection device 12 all adopt proximity switches.

Specifically, the pushing mechanism 6 includes a pushing plate 61, a first driving device 62 for driving the pushing plate 61 to move, and a first pushing member 63 and a second pushing member 64 which are arranged at one end of the pushing plate 61 far away from the first driving device 62, wherein the first pushing member 63 is arranged opposite to the second blank 200 on the punching and cutting station 3, and is used for pushing the second blank 200 to the bending station 4; the second pushing member 64 is arranged opposite to the third blank 300 on the press bending station 4, and is used for pushing the third blank 300 to the forming station 5. Specifically, the first driving device 62 of the present application employs a telescopic cylinder, and the pushing plate 61 is pushed to move by the telescopic end of the cylinder, so as to push the first pushing member 63 and the second pushing member 64 to move simultaneously, the first pushing member 63 is arranged opposite to the second blank 200 on the punching and cutting station 3, and the second pushing member 64 is arranged opposite to the third blank 300 on the bending station 4, so that the second blank 200 and the third blank 300 are pushed to the next station simultaneously, and the efficiency is higher.

In addition, the forming station 5 comprises a forming mounting seat 51, a forming slide block 52, a forming chute 53 and a forming core group 54. The two molding installation seats 51 are oppositely arranged below the upper die holder 1; the forming sliding blocks 52 are movably arranged on the forming mounting seats 51 and are in wedge fit with the forming mounting seats 51, so that the two forming sliding blocks 52 move towards or away from each other when moving upwards or downwards relative to the corresponding forming mounting seats 51, and hinge forming surfaces 521 are arranged at the opposite ends of the two forming sliding blocks 52; the molding chute 53 and the molding mounting seat 51 are correspondingly arranged on the lower die holder 2; the forming die core group 54 is used for receiving the blank pushed from the stamping and bending station 4, and the outer wall of the forming die core group 54 is matched with the hinge forming surface 521; when the upper die holder 1 moves downwards to be matched with the lower die holder 2, the two forming installation seats 51 gradually extend into the corresponding forming sliding grooves 53, and the two forming sliding blocks 52 move upwards relative to the forming installation seats 51 under the blocking of the lower die holder 2, so that the two forming sliding blocks 52 move oppositely to form a forming cavity for forming the fence door hinge by the two hinge forming surfaces 521 and the forming die core group 54.

Furthermore, a return elastic element 55 is arranged between the forming slide block 52 and the upper die base 1, when the forming slide block 52 moves upwards relative to the corresponding forming installation base 51, the return elastic element 55 compresses the return elastic element 55, when the die is opened, the return elastic element 55 returns to push the forming slide block 52 to move downwards relative to the corresponding forming installation base 51, and the two forming slide blocks 52 move back to back and leave the forming die core group 54. The structure is more compact, and the die sinking is convenient.

More specifically, the hinge forming surface 521 includes a first arc section forming surface 521a, a first straight section forming surface 521b, a second arc section forming surface 521c, and a second straight section forming surface 521d, which are connected in sequence, the forming die core group 54 includes an upper die core 541 and a lower die core 542 which are arranged at intervals, the upper die core 541 is matched with the first arc section forming surface 521a, the lower die core 542 is respectively matched with the second arc section forming surface 521c and the second straight section forming surface 521d, and the hinge forming surface 521 and the forming die core group 54 are matched to punch the third blank 300 to form the barrier door hinge forming part 400 shown in fig. 10.

Further, the molding station 5 further includes a core mounting plate 56, a core guide frame 57, and a second driving device 58. The die core guide frame 57 is arranged on the lower die base 2, one end of the forming die core group 54 is arranged on the die core mounting plate 56, and the other end is movably arranged in the die core guide frame 57; the second driving device 58 is used for driving the die core mounting plate 56 to make the forming die core group 54 pass through and extend out of the die core guide frame 57 to receive the third blank 300, or retract into the die core guide frame 57 to make the formed part 400 fall into the blanking through groove 7. Specifically, the second driving device 58 employs a telescopic cylinder.

Still further, the press bending station 4 comprises a press bending female die 41, a press bending male die 42 and a material pressing rod 43. The two punching and bending female dies 41 are oppositely arranged below the upper die holder 1, and punching and bending forming surfaces 411 are arranged at the opposite ends of the two punching and bending female dies 41; the bending punch 42 is matched with the bending forming surface 411; the material pressing rod 43 is in sliding fit with the upper die holder 1, and the material pressing rod 43 is positioned between the two bending female dies 41 and above the bending male die 42; when the upper die holder 1 moves downwards to be matched with the lower die holder 2, the material pressing rod 43 presses against the upper surface of the second blank 200, and the two punching and bending female dies 41 move downwards to be matched with the punching and bending male die 42 to punch and bend the second blank 200 into a third blank 300. The blank is kept stable and does not swing in the stamping forming process through the material pressing rod 43, and the defective rate is reduced.

Specifically, be equipped with crooked roller bearing 8 on the kick-bending die 41, crooked roller bearing 8 is located the forming surface 411 lower extreme that bends, just the curved surface of crooked roller bearing 8 with the forming surface 411 lower extreme that bends is connected. The punching, bending and die assembly are facilitated.

More specifically, two ends of the bending punch 42 are provided with positioning mechanisms 9, each positioning mechanism 9 includes a positioning mounting seat 91 arranged on the lower die holder 2, a swinging block 92 hinged to the positioning mounting seat 91 and used for supporting the second blank 200, a swinging elastic member (not shown in the figure) used for keeping the swinging block 92 swinging upward, a swinging limiting member 93 arranged on the positioning mounting seat 91 and used for limiting the upward swinging height of the swinging block 92, and a pushing limiting member 94 arranged on the positioning mounting seat 91 and used for limiting the pushing distance of the second blank 200. During operation, the swing elastic member enables the swing block 92 to keep an upward swing trend and is limited by the swing limiting member 93, the second blank 200 is pushed onto the swing block 92 and is limited and positioned by the push limiting member 94, when the bending female die 41 of the bending station 4 moves downwards, two ends of the second blank 200 are bent downwards around a central point, the swing block 92 is pushed to turn downwards, and when the second blank 200 is bent to be separated from the swing block 92, the swing block 92 is reset through the swing elastic member. And defective products caused by blank position deviation are avoided.

More specifically, the punching and cutting station 3 includes a lower template 31 disposed above the lower die holder 2, a lower die insert 32 disposed in the lower template 31, an upper template 33 disposed below the upper die holder 1, and an upper die punch 34 disposed on the upper template 33 and matched with the lower die insert 32, the lower die insert 32 includes a cutting die 321, and a primary punching die 322 and a secondary punching die 323 respectively disposed at two sides of the cutting die 321, and the upper die punch 34 includes a cutting punch 341 matched with the cutting die 321, a primary punching punch 342 matched with the primary punching die 322, and a secondary punching punch 343 matched with the secondary punching die 323. The utility model discloses at a stamping forming in-process, realize punching a hole, cutting off and the secondary of preceding first blank 100 to first blank 100 and punch a hole, accomplish simultaneously and punch a hole, cut off, production efficiency is high.

The above description is provided for one embodiment of the present invention, and the embodiments of the present invention are not limited to these descriptions, and the present invention is not limited to the above nomenclature and the English nomenclature since the trade nomenclature is different. All with the utility model discloses a method, structure etc. are similar, the same, or to the utility model discloses make a plurality of technological deductions or replacement under the design prerequisite, all should regard as the utility model discloses a protection scope.

Claims (10)

1. The automatic molding line for the fence door hinge is characterized by comprising an upper die holder (1), a lower die holder (2) and a feeding mechanism (13), wherein a punching and cutting station (3) for punching and cutting a first blank (100) into a second blank (200), a punching and bending station (4) for punching and bending the second blank (200) into a third blank (300), a molding station (5) for forming the third blank (300) into a molded part (400), a pushing mechanism (6) and a blanking through groove (7) which is arranged on the lower die holder (2) and is positioned below the molding station (5) are arranged between the upper die holder (1) and the lower die holder (2), and when the upper die holder (1) and the lower die holder (2) are closed, the punching and cutting station (3), the punching and bending station (4) and the molding station (5) respectively and simultaneously punch, cut, bend and stamp and process the blanks on the corresponding stations; after the upper die holder (1) and the lower die holder (2) are opened, the pushing mechanism (6) pushes a second blank (200) on the punching and cutting station (3) to the punching and bending station (4) and pushes a third blank (300) on the punching and bending station (4) to the forming station (5).

2. The automatic molding line for the fence door hinge according to claim 1, wherein a first detecting device (10) for detecting that the first blank (100) is in place is arranged on the punching and cutting station (3), a second detecting device (11) for detecting that the second blank (200) is in place is arranged on the punching and bending station (4), and a third detecting device (12) for detecting that the third blank (300) is in place is arranged on the molding station (5).

3. The automatic molding line of the fence door hinge as claimed in claim 1, wherein the material pushing mechanism (6) comprises a material pushing plate (61), a first driving device (62) for driving the material pushing plate (61) to move, and a first material pushing member (63) and a second material pushing member (64) which are arranged at one end of the material pushing plate (61) far away from the first driving device (62), wherein the first material pushing member (63) is arranged opposite to the second blank (200) on the punching and cutting station (3) for pushing the second blank (200) to the punching and bending station (4); the second material pushing part (64) is arranged opposite to the third blank (300) on the punching and bending station (4) and used for pushing the third blank (300) to the forming station (5).

4. -the automatic line of molding of hinges for gates according to claim 1, characterized in that said molding station (5) comprises:

the two molding installation seats (51) are oppositely arranged below the upper die holder (1);

the forming sliding blocks (52) are movably arranged on the forming installation seats (51) and are matched with the forming installation seats (51) in a wedge manner, so that the two forming sliding blocks (52) move towards or away from each other when moving upwards or downwards relative to the corresponding forming installation seats (51), and hinge forming surfaces (521) are arranged at the opposite ends of the two forming sliding blocks (52);

the molding chute (53) is arranged on the lower die seat (2) corresponding to the molding mounting seat (51);

the forming die core group (54) is used for receiving the blank pushed from the stamping and bending station (4), and the outer wall of the forming die core group (54) is matched with the hinge forming surface (521);

the resetting elastic element (55) is arranged between the forming sliding blocks (52) and the upper die base (1), the resetting elastic element (55) is compressed when the forming sliding blocks (52) move upwards relative to the corresponding forming mounting bases (51), and when the die is opened, the resetting elastic element (55) resets and pushes the forming sliding blocks (52) to move downwards relative to the corresponding forming mounting bases (51) and enables the two forming sliding blocks (52) to move back to back and leave the forming die core group (54);

when the upper die holder (1) moves downwards to be matched with the lower die holder (2), the two forming installation seats (51) gradually extend into the corresponding forming sliding grooves (53), and the two forming sliding blocks (52) are blocked by the lower die holder (2) to move upwards relative to the forming installation seats (51), so that the two forming sliding blocks (52) move oppositely to form a forming cavity for forming the fence door hinge by the two hinge forming surfaces (521) and the forming die core group (54).

5. The automatic molding line for the fence door hinge according to claim 4, wherein the hinge molding surface (521) comprises a first arc molding surface (521 a), a first straight molding surface (521 b), a second arc molding surface (521 c) and a second straight molding surface (521 d) which are sequentially connected, the molding core group (54) comprises an upper mold core (541) and a lower mold core (542) which are arranged at intervals, the upper mold core (541) is matched with the first arc molding surface (521 a), and the lower mold core (542) is respectively matched with the second arc molding surface (521 c) and the second straight molding surface (521 d).

6. An automated line for the formation of hinges for gates according to claim 4, characterized in that said forming station (5) further comprises:

a core mounting plate (56);

the die core guide frame (57) is arranged on the lower die base (2), one end of the forming die core group (54) is arranged on the die core mounting plate (56), and the other end of the forming die core group is movably arranged in the die core guide frame (57);

and the second driving device (58) is used for driving the die core mounting plate (56) to enable the forming die core group (54) to pass through and extend out of the die core guide frame (57) to receive the third blank (300) or retract into the die core guide frame (57) to enable the formed part (400) to fall into the blanking through groove (7).

7. An automatic line for the formation of hinges for gates, according to claim 1, characterized in that said punching and bending station (4) comprises:

the stamping and bending die comprises stamping and bending female dies (41), wherein the two stamping and bending female dies (41) are oppositely arranged below an upper die holder (1), and stamping and bending forming surfaces (411) are respectively arranged at the opposite ends of the two stamping and bending female dies (41);

a bending punch (42) which is matched with the bending forming surface (411);

the material pressing rod (43) is in sliding fit with the upper die base (1), and the material pressing rod (43) is located between the two bending female dies (41) and above the bending male die (42);

when the upper die holder (1) moves downwards to be matched with the lower die holder (2), the material pressing rod (43) presses the upper surface of the second blank (200), and the two punching and bending female dies (41) move downwards to be matched with the punching and bending male dies (42) to punch and bend the second blank (200) into a third blank (300).

8. The automatic molding line for a fence door hinge according to claim 7, wherein the punching and bending die (41) is provided with a bending roller (8), the bending roller (8) is located at the lower end of the punching and bending molding surface (411), and the curved surface of the bending roller (8) is connected with the lower end of the punching and bending molding surface (411).

9. The automatic molding line for the fence door hinge according to claim 7, wherein two ends of the bending punch (42) are provided with positioning mechanisms (9), each positioning mechanism (9) comprises a positioning mounting seat (91) arranged on the lower die holder (2), a swinging block (92) hinged to the positioning mounting seat (91) and used for supporting the second blank (200), a swinging elastic member used for enabling the swinging block (92) to keep an upward swinging trend, a swinging limiting member (93) arranged on the positioning mounting seat (91) and used for limiting the upward swinging height of the swinging block (92), and a pushing limiting member (94) arranged on the positioning mounting seat (91) and used for limiting the pushing distance of the second blank (200).

10. The automatic molding line for the fence door hinge according to claim 1, wherein the punching and cutting station (3) comprises a lower template (31) arranged above the lower die holder (2), a lower die insert (32) arranged in the lower template (31), an upper template (33) arranged below the upper die holder (1), and an upper die punch (34) arranged on the upper template (33) and matched with the lower die insert (32), the lower die insert (32) comprises a cutting die (321), and a primary punching die (322) and a secondary punching die (323) respectively arranged at two sides of the cutting die (321), and the upper die punch (34) comprises a cutting punch (341) matched with the cutting die (321), a primary punching punch (342) matched with the primary punching die (322), and a secondary punching punch (343) matched with the secondary punching die (323).

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