Double-support forming die combination

Abstract

The utility model discloses a double-support forming die assembly. The double-support forming die assembly mainly comprises a blanking pre-punching die, a drawing forming die, a flanging shaping die, a punching separation die and a forming die suite which are sequentially arranged. By the adoption of the double-support forming die combination, when the blanking pre-punching die is used for punching the first installation process hole, a plurality of separation process holes are punched at the same time, all the separation process holes are located in the vertical face positions where all the convex hulls intersect with the center separation line, and therefore the punching separation die only needs to conduct horizontal cutting along the center separation line; in the cutting process, vertical face cutting is not needed, so that the smoothness of the outer edges of the two sides of the cutting seam is guaranteed, vertical face trimming through a special die or a special tool is not needed any more, the die development cost is reduced, the production efficiency is improved, the risk of cutter breakage possibly occurring in the vertical face cutting process is eliminated, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of double-bracket stamping equipment, in particular to a double-bracket forming die combination. Background Art

[0002] With the development of stamping die technology, in order to improve stamping efficiency, more and more stamping die combinations are able to form two or even more sheet metal parts after a series of processing.

[0003] Since the bracket is usually designed with a convex bulge to improve the structural strength, the existing double bracket forming die combination requires horizontal cutting at most of the overall position and vertical cutting at the vertical surface of the convex bulge. Limited by the working form of the lifting and lowering operation of the stamping die, the horizontal cutting is usually very smooth, while the vertical cutting will produce more burrs. Not only does it require special dies or special tools to trim the vertical surface, which affects production efficiency, but the risk of chipping during vertical cutting is also high, the maintenance cost is high, and there are certain safety hazards.

[0004] Solving the above problems has become a top priority. Utility Model Content

[0005] In order to solve the technical problem that the existing double-bracket forming mold combination needs to perform vertical cutting on the vertical surface of the convex hull, which is not only easy to break the knife but also requires additional vertical trimming, the utility model provides a double-bracket forming mold combination.

[0006] The technical solution is as follows:

[0007] The first aspect of the present application relates to a double-bracket forming die assembly, comprising:

[0008] A blanking pre-punching die is used to separate the preformed sheet metal from the feeding belt and to punch a plurality of first installation process holes and a plurality of separation process holes on the separated preformed sheet metal. Each separation process hole is a strip hole and is distributed on the central separation line of the preformed sheet metal along its length direction;

[0009] A drawing forming die, which is used to form at least one convex hull on the preformed sheet metal by drawing, and the positions where the central separation line and each convex hull intersect in the vertical direction are all the separation process holes;

[0010] Flanging and shaping dies, which are used to flanging and shaping preformed sheet metal parts;

[0011] A punching separation die is used for punching a plurality of second installation process holes on the preformed sheet metal part, and for cutting the preformed sheet metal part horizontally along the center separation line to obtain two bracket blanks;

[0012] A forming die set is used to form a bracket blank into a bracket finished product.

[0013] By adopting the above double-bracket forming mold combination, when the first installation process hole is punched out by the blanking pre-punching mold, multiple separation process holes are punched out at the same time, and each separation process hole is located at the vertical position where each convex hull intersects with the center separation line, so that the punching separation mold only needs to perform horizontal cutting along the center separation line, and no vertical cutting is required, thereby ensuring the smoothness of the outer edges on both sides of the cut seam. Not only is there no need to use special molds or special tools for vertical trimming, which reduces the mold development cost and improves production efficiency, but also eliminates the risk of chipping that may occur during vertical cutting and eliminates safety hazards.

[0014] In some embodiments, the molding die kit includes a bending molding die and a lug punching die, wherein the bending molding die is used to bend at least one mounting lug on the bracket blank, and the lug punching die is used to stamp a third mounting process hole on each mounting lug, thereby obtaining a finished bracket.

[0015] In some embodiments, the blanking pre-punching mold includes a first upper mold and a first lower mold, the first upper mold has a first process hole punch corresponding to each first installation process hole and a separation hole punch corresponding to each separation process hole, the bottom of the first upper mold has a first upper template and a first inner stripping plate that can be lifted and lowered along the first upper template, the lower end of each first process hole punch and each separation hole punch can extend downward into the first inner stripping plate, the top of the first lower mold has a first lower template that is compatible with the first upper template and the first inner stripping plate, a first outer stripping plate that can be lifted and lowered along the first lower template, and at least one first elastic element for making the first outer stripping plate have an upward trend, and the first lower template is provided with a first punch clearance hole that is compatible with the first process hole punch and a separation hole punch clearance hole that is compatible with the separation hole punch.

[0016] In some embodiments, the drawing forming die includes a second upper die and a second lower die, the top of the second lower die has an upwardly extending forming pressure head, a second outer release plate that can be raised and lowered along the forming pressure head, and at least one second elastic element for making the second outer release plate have an upward trend, and the bottom of the second upper die has a second upper template, and the bottom surface of the second upper template is recessed to form a forming groove that matches the forming pressure head.

[0017] In some embodiments, the flanging shaping mold includes a third upper mold and a third lower mold, the bottom of the third upper mold has a shaping pressure head extending downward, the top of the third lower mold has a third lower mold plate, and the top surface of the third lower mold plate is recessed to form a shaping groove that matches the shaping pressure head.

[0018] In some embodiments, the punching separation mold includes a fourth upper mold and a fourth lower mold, the top of the fourth lower mold has a sheet metal positioning plate for positioning the preformed sheet metal, the lower part of the fourth upper mold is provided with second process hole punches corresponding to each second installation process hole and a horizontal cutter for horizontally cutting the preformed sheet metal, the bottom of the upper mold has a plurality of downwardly extending lifting guide rods, an upper mold stripping feeder belt that can be simultaneously lifted and lowered along each lifting guide rod, and at least one third elastic element for making the upper mold stripping feeder belt have a downward trend, and the lower ends of the horizontal cutter and each second process hole punch can extend downward into the upper mold stripping feeder belt.

[0019] In some embodiments, the bending forming mold includes a fifth upper mold and a fifth lower mold, the bottom of the fifth upper mold has an upper mold ear forming press head, and the top of the fifth lower mold has a lower mold ear forming groove matched with the upper mold ear forming press head.

[0020] In some embodiments, the ear punching die includes a sixth upper die and a sixth lower die, the top of the sixth lower die has a blank positioning plate for positioning the bracket blank, the lower part of the sixth upper die has an upper die pad, the upper die pad has third process hole punches corresponding to each third installation process hole, the bottom of the upper die pad has a plurality of guide rods extending downward and an upper stripping feed belt that can be lifted and lowered along each guide rod at the same time, the sixth upper die is provided with at least one fourth elastic element for making the upper stripping feed belt have a downward trend, and the lower end of the third process hole punch can extend downward into the upper stripping feed belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of processing a preformed sheet metal part into a finished bracket by using a blanking pre-punching die, a drawing forming die, a flanging shaping die, a punching separation die, a bending forming die and a lug punching die;

[0022] Figure 2 It is a schematic diagram of the structure of the feeding belt;

[0023] Figure 3 It is a schematic diagram of the coordination relationship between the blanking pre-punching die, the drawing forming die, the flanging shaping die, the punching separation die, the bending forming die and the lug punching die;

[0024] Figure 4 It is a structural schematic diagram of the blanking pre-punching die;

[0025] Figure 5 It is a schematic diagram of the matching relationship between the first lower template and the first outer release plate;

[0026] Figure 6 It is a structural schematic diagram of the drawing forming die;

[0027] Figure 7 It is a structural schematic diagram of the flanging shaping die;

[0028] Figure 8 It is a structural schematic diagram of the punching separation die;

[0029] Fig. 9 It is a structural schematic diagram of a bending forming die;

[0030] Fig.10 It is a schematic diagram of the structure of the ear punching die. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with embodiments and drawings.

[0032] like Figure 1-Figure 10 As shown, a double-bracket forming die combination mainly includes a blanking pre-punching die 1, a drawing forming die 2, a flanging shaping die 3, a punching separation die 4 and a forming die kit which are arranged in sequence.

[0033] Among them, the blanking pre-punching die 1 is used for separating the preformed sheet metal 7a from the feeding belt 7, and for punching a plurality of first installation process holes 7a1 and a plurality of separation process holes 7a2 on the separated preformed sheet metal 7a. Specifically, a feeding belt 7 has a plurality of unpeeled preformed sheet metals 7a, and the blanking pre-punching die 1 is used for peeling off one of the preformed sheet metals 7a on the feeding belt 7, and at the same time, punching a plurality of first installation process holes 7a1 and a plurality of separation process holes 7a2 on the preformed sheet metal 7a. Each first installation process hole 7a1 is a small round hole, each separation process hole 7a2 is a strip hole, and each separation process hole 7a2 is distributed on the central separation line 7a3 of the preformed sheet metal 7a, and the length direction of each separation process hole 7a2 is the extension direction of the central separation line 7a3.

[0034] The drawing die 2 is used to draw at least one bulge 7a4 on the preformed sheet metal part 7a, and the positions where the center separation line 7a3 intersects with each bulge 7a4 in the vertical direction are all separation process holes 7a2, that is, the center separation line 7a3 is provided with a separation process hole 7a2 in the vertical direction through each bulge 7a4.

[0035] Furthermore, in order to completely avoid the occurrence of vertical cutting, the two ends of each separation process hole 7a2 extend to the horizontal plane of the preformed sheet metal 7a and the bulge 7a4 respectively. Not only is it no longer necessary to use special molds or special tools to perform vertical trimming, thereby improving production efficiency, but it also eliminates the risk of tool breakage that may occur during vertical cutting, eliminates safety hazards, and avoids the occurrence of cutting and adhesion at the intersection of the horizontal and vertical planes.

[0036] The flanging shaping mold 3 is used to flanging and shaping the preformed sheet metal part 7a, that is, the flanging shaping mold 3 shapes the preformed sheet metal part 7a while flanging the preformed sheet metal part 7a, thereby ensuring the accuracy of subsequent processes.

[0037] The punching separation die 4 is used to punch a plurality of second installation process holes 7a5 on the preformed sheet metal 7a, and to cut the preformed sheet metal 7a in the horizontal direction along the center separation line 7a3 to obtain two bracket blanks 7a'. That is, the punching separation die 4 is mainly used to cut the preformed sheet metal 7a into two halves along the center separation line 7a3, so as to obtain two bracket blanks 7a', wherein, since the preformed sheet metal 7a is provided with separation process holes 7a2 in the vertical direction on the center separation line 7a3, it is only necessary to cut the corresponding preformed sheet metal 7a horizontally, and at the same time, the punching separation die 4 is also used to punch a plurality of second installation process holes 7a5 on the preformed sheet metal 7a.

[0038] The forming mold kit is used to form the bracket blank 7a' into a bracket finished product 7a". Specifically, the forming mold kit includes a bending forming mold 5 and a lug punching mold 6. The bending forming mold 5 is used to bend at least one mounting lug 7a'1 on the bracket blank 7a', and the lug punching mold 6 is used to punch and form a third mounting process hole 7a'2 on each mounting lug 7a'1, thereby obtaining a bracket finished product 7a".

[0039] Therefore, in this embodiment, the blanking pre-punching die 1, the drawing forming die 2, the flanging shaping die 3, the punching separation die 4, the bending forming die 5 and the ear punching die 6 cooperate with each other. When the blanking pre-punching die 1 punches the first installation process hole 7a1, multiple separation process holes 7a2 are punched out at the same time. Each separation process hole 7a2 is located at the vertical position where each convex bulge 7a4 intersects with the central separation line 7a3, so that the punching separation die 4 only needs to perform horizontal cutting along the central separation line, and no vertical cutting is required, thereby ensuring the smoothness of the outer edges on both sides of the cut seam. Not only is it no longer necessary to perform vertical trimming through special molds or special tools, reducing the mold development cost and improving production efficiency, but also eliminating the risk of knife breakage that may occur during vertical cutting and eliminating safety hazards.

[0040] See also Figure 4 and Figure 5The blanking pre-punching die 1 includes a first upper die 1a and a first lower die 1b. The first upper die 1a has first process hole punches 1a1 corresponding to each first installation process hole 7a1 and separation hole punches 1a2 corresponding to each separation process hole 7a2. The bottom of the first upper die 1a has a first upper die plate 1a3 and a first inner stripping plate 1a4 that can be lifted and lowered along the first upper die plate 1a3. The lower ends of the first process hole punches 1a1 and the separation hole punches 1a2 can be inserted downward into the first inner stripping plate. In 1a4, the top of the first lower mold 1b has a first lower mold 1b1 that matches the first upper mold 1a3 and the first inner stripping plate 1a4, a first outer stripping plate 1b2 that can be lifted and lowered along the first lower mold 1b1, and at least one first elastic element 1b3 for making the first outer stripping plate 1b2 have an upward trend, and the first lower mold 1b1 is provided with a first punch clearance hole 1b11 that matches the first process hole punch 1a1 and a separation hole punch clearance hole 1b12 that matches the separation hole punch 1a2. The blanking pre-punching mold 1 has a simple and reliable structure, which can not only ensure the reliable stripping of the preformed sheet metal 7a, but also reliably punch out the first installation process hole 7a1 and the separation process hole 7a2 on the stripped preformed sheet metal 7a, and is easy to demold.

[0041] The feeding belt 7 is placed on the first outer release plate 1b2, and one of the preformed sheet metal parts 7a is placed on the first lower template 1b1. When the first upper mold 1a is pressed down, the first upper template 1a3 contacts the first outer release plate 1b2, and then the first upper template 1a3 presses down the first outer release plate 1b2. After the first inner release plate 1a4 contacts the first lower template 1b1, the first lower template 1b1 pushes up the first inner release plate 1a4. Therefore, the preformed sheet metal part 7a placed on the first lower template 1b1 is separated from the feeding belt 7. At the same time, the first upper mold 1a drives each first process hole punch 1a1 and each separation hole punch 1a2 to be respectively embedded in the corresponding first punch clearance hole 1b11 and the corresponding separation hole punch clearance hole 1b12, thereby punching out the first installation process hole 7a1 and the separation process hole 7a2 in the preformed sheet metal part 7a placed on the first lower template 1b1.

[0042] See also Figure 6 The drawing forming die 2 comprises a second upper die 2a and a second lower die 2b, the top of the second lower die 2b has a forming ram 2b1 extending upward, a second outer stripping plate 2b2 capable of rising and falling along the forming ram 2b1, and at least one second elastic element 2b3 for making the second outer stripping plate 2b2 have an upward trend, and the bottom of the second upper die 2a has a second upper template 2a1, the bottom surface of the second upper template 2a1 is concavely formed with a forming groove 2a11 adapted to the forming ram 2b1. The structure of the drawing forming die 2 is simple and reliable, which not only ensures the reliability of the forming of the convex 7a4, but also facilitates demolding.

[0043] The preformed sheet metal 7a is placed on the forming press 2b1 and the second outer release plate 2b2. When the second upper mold 2a is pressed down, the second upper mold plate 2a1 forces the second outer release plate 2b2 to be pressed down, and the upper end of the forming press 2b1 is pushed into the forming groove 2a11, thereby pushing out a bulge 7a4 on the preformed sheet metal 7a.

[0044] Furthermore, in order to ensure reliable positioning of the preformed sheet metal 7a, the upper end surface of the forming press head 2b1 protrudes upward to form a first positioning protrusion 2b11 respectively adapted to each first installation process hole 7a1, and each first positioning protrusion 2b11 is respectively embedded in the corresponding first installation process hole 7a1, thereby ensuring the precise positioning of the preformed sheet metal 7a, thereby ensuring the processing accuracy of the preformed sheet metal 7a.

[0045] See also Figure 7 The flanging shaping die 3 includes a third upper die 3a and a third lower die 3b. The bottom of the third upper die 3a has a shaping head 3a1 extending downward, and the top of the third lower die 3b has a third lower die plate 3b1. The top surface of the third lower die plate 3b1 is concave to form a shaping groove 3b11 that matches the shaping head 3a1. The structure of the flanging shaping die 3 is simple and reliable, which ensures the reliability and processing accuracy of flanging and shaping.

[0046] The preformed sheet metal part 7a is placed on the third lower mold plate 3b1. When the third upper mold 3a is pressed downward, the lower end of the shaping press head 3a1 is pushed into the shaping groove 3b11, thereby completing flanging and shaping of the preformed sheet metal part 7a at the same time.

[0047] See also Figure 8 The punching separation mold 4 includes a fourth upper mold 4a and a fourth lower mold 4b. The top of the fourth lower mold 4b has a sheet metal positioning plate 4b1 for positioning the preformed sheet metal 7a. The lower part of the fourth upper mold 4a is provided with a second process hole punch 4a2 corresponding to each second installation process hole 7a5 and a horizontal cutter 4a3 for horizontally cutting the preformed sheet metal 7a. The bottom of the upper mold 4a has a plurality of lifting guide rods 4a4 extending downward, an upper mold stripping feed belt 4a5 that can be lifted and lowered along each lifting guide rod 4a4 at the same time, and at least one third elastic element 4a1 for making the upper mold stripping feed belt 4a5 have a downward trend. The lower ends of the horizontal cutter 4a3 and each second process hole punch 4a2 can be inserted downward into the upper mold stripping feed belt 4a5. The punching separation mold 4 has a simple and reliable structure, which not only ensures the stability and reliability of horizontal cutting, but also ensures the reliability of punching, and is easy to demold.

[0048] The preformed sheet metal 7a is placed on the sheet metal positioning plate 4b1. When the fourth upper mold 4a is pressed down, the second process hole punch 4a2 processes the second installation process hole 7a5. At the same time, the horizontal cutter 4a3 horizontally cuts the preformed sheet metal 7a along the center separation line 7a3, dividing the preformed sheet metal 7a into two to obtain two bracket blanks 7a'.

[0049] See also Fig. 9 The bending forming mold 5 includes a fifth upper mold 5a and a fifth lower mold 5b. The bottom of the fifth upper mold 5a has an upper mold ear forming press head 5a1, and the top of the fifth lower mold 5b has a lower mold ear forming groove 5b1 that matches the upper mold ear forming press head 5a1. The bending forming mold 5 has a simple and reliable structure, which ensures the reliability of bending to form the mounting ear 7a'1.

[0050] The bracket blank 7a' is placed on the lower die ear forming groove 5b1. When the fifth upper die 5a is pressed down, the lower end of the upper die ear forming press head 5a1 is pushed into the lower die ear forming groove 5b1, thereby bending the bracket blank 7a' to form a mounting ear 7a'1.

[0051] Furthermore, in order to ensure reliable positioning of the bracket blank 7a', a second positioning protrusion 5b11 which is respectively matched with the first installation process hole 7a1 or the second installation process hole 7a5 is protruded on the groove wall of the lower mold ear forming groove 5b1, and each second positioning protrusion 5b11 is respectively embedded in the corresponding first installation process hole 7a1 or the second installation process hole 7a5, thereby ensuring the precise positioning of the bracket blank 7a', thereby ensuring the processing accuracy of the bracket blank 7a'.

[0052] See also Fig.10 The ear punching die 6 comprises a sixth upper die 6a and a sixth lower die 6b. The top of the sixth lower die 6b has a blank positioning plate 6b1 for positioning the bracket blank 7a'. The lower part of the sixth upper die 6a has an upper die pad 6a1. The upper die pad 6a1 has third process hole punches 6a2 corresponding to each third installation process hole 7a'2. The bottom of the upper die pad 6a1 has a plurality of guide rods 6a3 extending downward and an upper stripping feed belt 6a4 that can be lifted and lowered along each guide rod 6a3 at the same time. The sixth upper die 6a is provided with at least one fourth elastic element 6a5 for making the upper stripping feed belt 6a4 have a downward trend. The lower end of the third process hole punch 6a2 can be inserted downward into the upper stripping feed belt 6a4. The structure of the ear punching die 6 is simple and reliable, which ensures the reliability of punching and forming the third installation process hole 7a'2 on each installation ear 7a'1, and is easy to demold.

[0053] The bracket blank 7a' is placed on the blank positioning plate 6b1. When the sixth upper die 6a is pressed down, the third process hole punch 6a2 processes the third installation process hole 7a'2 on the corresponding installation lug 7a'1, thereby obtaining the bracket finished product 7a".

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A double-bracket forming die assembly, characterized in that: Including the following settings: A blanking pre-punching die (1) is used for separating a preformed sheet metal part (7a) from a feeding belt (7), and for punching a plurality of first installation process holes (7a1) and a plurality of separation process holes (7a2) on the separated preformed sheet metal part (7a), wherein each separation process hole (7a2) is a strip-shaped hole and is distributed on a central separation line (7a3) of the preformed sheet metal part (7a) extending along its length direction; A drawing forming die (2) used for forming at least one convex hull (7a4) by drawing on a preformed sheet metal part (7a), wherein the positions where the central separation line (7a3) and each convex hull (7a4) intersect in the vertical direction are both the separation process holes (7a2); A flanging and shaping die (3) for flanging and shaping a preformed sheet metal part (7a); A punching separation die (4) is used for punching a plurality of second installation process holes (7a5) on the preformed sheet metal part (7a), and for cutting the preformed sheet metal part (7a) in a horizontal direction along a center separation line (7a3) to obtain two bracket blanks (7a'); A forming die set is used for forming a bracket blank (7a') into a bracket finished product (7a").

2. The double-bracket forming mold assembly according to claim 1, characterized in that: The forming die set comprises a bending forming die (5) and a lug punching die (6), wherein the bending forming die (5) is used to bend at least one mounting lug (7a'1) on a bracket blank (7a'), and the lug punching die (6) is used to punch and form a third mounting process hole (7a'2) on each mounting lug (7a'1), thereby obtaining a bracket finished product (7a").

3. The double-bracket forming mold assembly according to claim 1, characterized in that: The blanking pre-punching die (1) comprises a first upper die (1a) and a first lower die (1b); the first upper die (1a) has first process hole punches (1a1) corresponding to each first installation process hole (7a1) and separation hole punches (1a2) corresponding to each separation process hole (7a2); the bottom of the first upper die (1a) has a first upper template (1a3) and a first inner stripping plate (1a4) that can be raised and lowered along the first upper template (1a3); the lower ends of each first process hole punch (1a1) and each separation hole punch (1a2) can be inserted downward into the first inner stripping plate (1a4). In the plate (1a4), the top of the first lower mold (1b) has a first lower mold (1b1) adapted to the first upper mold (1a3) and the first inner stripping plate (1a4), a first outer stripping plate (1b2) capable of rising and falling along the first lower mold (1b1), and at least one first elastic element (1b3) for making the first outer stripping plate (1b2) have an upward tendency, and the first lower mold (1b1) is provided with a first punch clearance hole (1b11) adapted to the first process hole punch (1a1) and a separation hole punch clearance hole (1b12) adapted to the separation hole punch (1a2).

4. The double-bracket forming mold assembly according to claim 1, characterized in that: The drawing forming die (2) comprises a second upper die (2a) and a second lower die (2b); the top of the second lower die (2b) comprises a forming pressure head (2b1) extending upward, a second outer release plate (2b2) ​​capable of rising and falling along the forming pressure head (2b1), and at least one second elastic element (2b3) for making the second outer release plate (2b2) ​​have an upward tendency; the bottom of the second upper die (2a) comprises a second upper template (2a1); the bottom surface of the second upper template (2a1) is concavely formed with a forming groove (2a11) adapted to the forming pressure head (2b1).

5. The double-bracket forming mold assembly according to claim 1, characterized in that: The flanging shaping die (3) comprises a third upper die (3a) and a third lower die (3b), the bottom of the third upper die (3a) having a shaping press head (3a1) extending downward, the top of the third lower die (3b) having a third lower template (3b1), the top surface of the third lower template (3b1) being concavely formed with a shaping groove (3b11) adapted to the shaping press head (3a1).

6. The double-bracket forming mold assembly according to claim 1, characterized in that: The punching separation mold (4) comprises a fourth upper mold (4a) and a fourth lower mold (4b), the top of the fourth lower mold (4b) is provided with a sheet metal positioning plate (4b1) for positioning the preformed sheet metal (7a), the lower part of the fourth upper mold (4a) is provided with a second process hole punch (4a2) corresponding to each second installation process hole (7a5) and a horizontal cutter (4a3) for horizontally cutting the preformed sheet metal (7a), the bottom of the upper mold (4a) is provided with a plurality of downwardly extending lifting guide rods (4a4), an upper mold stripping feed belt (4a5) capable of being simultaneously lifted and lowered along each lifting guide rod (4a4), and at least one third elastic element (4a1) for making the upper mold stripping feed belt (4a5) have a downward tendency, and the lower ends of the horizontal cutter (4a3) and each second process hole punch (4a2) can extend downward into the upper mold stripping feed belt (4a5).

7. The double-bracket forming mold assembly according to claim 2, characterized in that: The bending forming die (5) comprises a fifth upper die (5a) and a fifth lower die (5b); the bottom of the fifth upper die (5a) is provided with an upper die ear forming press head (5a1); the top of the fifth lower die (5b) is provided with a lower die ear forming groove (5b1) adapted to the upper die ear forming press head (5a1).

8. The double-bracket forming mold assembly according to claim 2, characterized in that: The ear punching die (6) comprises a sixth upper die (6a) and a sixth lower die (6b), the top of the sixth lower die (6b) is provided with a blank positioning plate (6b1) for positioning the bracket blank (7a'), the lower part of the sixth upper die (6a) is provided with an upper die pad (6a1), the upper die pad (6a1) is provided with third process hole punches (6a2) corresponding to each third installation process hole (7a'2) one by one, the bottom of the upper die pad (6a1) is provided with a plurality of guide rods (6a3) extending downward and an upper stripping feed belt (6a4) capable of being simultaneously raised and lowered along each guide rod (6a3), the sixth upper die (6a) is provided with at least one fourth elastic element (6a5) for making the upper stripping feed belt (6a4) have a downward tendency, and the lower end of the third process hole punch (6a2) can extend downward into the upper stripping feed belt (6a4).

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