A progressive forming die for a sloped connection seat and its forming process

Abstract

The present invention relates to a progressive forming die for a bevel connection seat and a forming process thereof, which is characterized in that it comprises an upper die seat, a lower die seat, a first punching die, a trimming die, a bending die, a calendering die, a second punching die and a cutting die; in the progressive forming of the bevel connection seat, the sheet material is cut in two stations when the trimming is cut, so as to avoid the deformation of the sheet material caused by synchronous cutting, which is not conducive to subsequent processing; in addition, in the forming die and the forming process, the processing of the crease position of the product is designed to form a reinforcing rib, which can increase the strength of the crease position after the product is processed; in addition, in the forming process, an empty station is set after each step of bending, calendering and secondary punching of the bevel connection seat, so as to avoid the problem of cracks and deformation of the sheet material caused by continuous processing of the sheet material in a short time; the forming die and the forming process effectively ensure the qualified rate of finished products of the bevel connection seat.

Description

Technical Field

[0001] The invention relates to the technical field of connecting piece processing, in particular to a progressive forming die for an inclined surface connecting seat and a forming process thereof. Background Art

[0002] In order to ensure that the inclined surface can be connected in the horizontal or vertical direction, a special inclined surface connection seat structure is generally set up for connection; the common inclined surface connection seat structure is processed by progressive die continuous forming, but the sheet contour edge material cutting method does not adopt step-by-step sheet cutting and regional sheet cutting, but directly punches the whole; this method is prone to sheet deformation problems; in addition, the bending position in the conventional inclined surface connection seat structure is prone to deformation, and its processing technology has not made improvements in anti-deformation; in addition, in the existing process, the subsequent processing steps are directly carried out after the sheet is bent, calendered and punched, and there is no buffer station, which makes the sheet easy to break and affects the product quality. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a bevel connection seat progressive forming mold and its forming process, which can solve the problem that there is no anti-deformation processing structure and process in the general bevel connection seat progressive forming, and the waste material removal of the outer contour of the sheet metal is not carried out in steps, resulting in serious deformation of the sheet metal.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a progressive forming die for a bevel connection seat, the innovation of which is that it includes an upper die seat, a lower die seat, a first punching die, a trimming die, a bending die, a calendering die, a second punching die and a cutting die;

[0005] A cavity is formed between the upper die seat and the lower die seat for the sheet material to pass through, and the sheet material is one die and one exit; the cavity between the upper die seat and the lower die seat is provided with a first punching station, a first trimming station, a second trimming station, a bending and calendering station, a first empty station, a calendering station, a second empty station, a second punching station, a third empty station and a cutting station in sequence along the extension direction; the first punching die is arranged at the first punching station; the trimming die has a pair and is respectively arranged at the first trimming station and the second trimming station; the bending die is arranged at the bending and calendering station; the calendering die is arranged at the bending and calendering station and the calendering station; the second punching die is arranged at the second punching station; the cutting die is arranged at the cutting station;

[0006] The first punching die comprises a first punching lower template, a positioning side hole punch and a progressive hole punch; the positioning side hole punch has a pair and is installed at the edge of the first punching station on the upper die base; the progressive hole punch is installed at a position closer to the middle of the first punching station on the upper die base, forming a triangular structure with the positioning side hole punch; the first punching lower template is installed on the lower die base, and the first punching lower template is provided with first blanking holes corresponding to the positioning side hole punch and the progressive hole punch;

[0007] The trimming die comprises a first trimming punch, a second trimming punch and a trimming lower template; the first trimming punch and the second trimming punch are both T-shaped structures; the first trimming punch is arranged at the first trimming station on the upper die base, and is used to cut off one side of the edge sheet and the gap area between adjacent blanks to form the outer contour of one end of the bevel connecting seat; the second trimming punch is arranged at the second trimming station on the upper die base, and is used to cut off the other side of the sheet and the gap area between adjacent blanks to form the outer contour of the other end of the bevel connecting seat; the groove depth cut by the first trimming punch on the sheet is greater than the groove depth cut by the second trimming punch on the sheet; the trimming lower template is arranged on the lower die base, and the trimming lower template is provided with second blanking holes corresponding to the first trimming punch and the second trimming punch;

[0008] The bending die comprises an upper bending punch and a lower bending table; the upper bending punch has a pair and is respectively installed at the bending and calendering stations of the upper die seat, and the bottom ends of the two upper bending punches extend out of the bottom end surface of the upper die seat and form a height difference, and the bottom end of the upper bending punch has a stepped bending surface; the lower bending table is arranged on the lower die seat, and two stepped bending cavities with a height difference are respectively arranged on the lower bending table corresponding to the two upper bending punches; the first calendering groove is arranged at the top crease position of the stepped bending cavity on one side of the first trimming punch on the lower bending table;

[0009] The calendering module includes a calendering punch; the calendering punch includes a first calendering punch, a second calendering punch and a third calendering punch; the first calendering head is arranged at the bending calendering station, and the first calendering head cooperates with the first calendering groove to form a reinforcing convex rib at the top crease position of the inclined surface connecting seat forming blank; the second calendering punch and the third calendering punch each have a pair and are respectively arranged on the upper die seat of the calendering station, and the lower die seat at the calendering station is respectively provided with a second calendering groove and a third calendering groove corresponding to the second calendering punch and the third calendering punch; the second calendering groove and the third calendering groove are respectively located at the two bottom crease positions of the inclined surface connecting seat forming blank; the second calendering punch cooperates with the second calendering groove, and the third calendering punch cooperates with the third calendering groove to form a reinforcing convex rib at the two bottom crease positions of the inclined surface connecting seat forming blank;

[0010] The second punching die comprises a second punching lower template, a hole-expanding punch, a U-shaped punch and a waist-shaped punch; the hole-expanding punch, the U-shaped punch and the waist-shaped punch are all installed at the position of the second punching station of the upper die seat; the hole-expanding punch corresponds to the progressive hole on the sheet material, the U-shaped punch is arranged at the edge position of the side of the second punching station, and is used to form a U-shaped groove on the sheet material; the waist-shaped punch is arranged at the middle position of the second punching station, and is used to form a waist-shaped groove on the sheet material; the second punching lower template is arranged on the lower die seat, and the second punching lower template is provided with a third blanking hole corresponding to the hole-expanding punch, the U-shaped punch and the waist-shaped punch;

[0011] The cutting die comprises a cutting punch and a cutting lower template, and the cutting punch is arranged at the cutting station of the upper die base; the cutting punch is used to cut the remaining sheet material between adjacent inclined surface connecting seat blanks; the cutting lower template is installed on the lower die base, and the cutting lower template is provided with a fourth blanking hole corresponding to the cutting punch; a blanking guide groove is provided on one side of the cutting die to realize the output of the formed inclined surface connecting seat from one side of the cutting die.

[0012] Furthermore, the first empty station is the station after the bending and calendering station, and the lower die seat of the first empty station is provided with a first sheet material placement seat for the blank that has completed bending and calendering; the second empty station is the station after the calendering station, and the lower die seat of the second empty station is provided with a second sheet material placement seat for the blank that has completed calendering; the third empty station is the station after the second punching station, and the lower die seat of the third empty station is provided with a third sheet material placement seat after the second punching is completed.

[0013] Further, the specific molding process of the molding die is as follows:

[0014] S1: Sheet positioning punching: The sheet is placed from the feed port of the forming die into a one-die-two-outlet progressive die. At the first punching station of the progressive die, two positioning side holes and one progressive hole are formed on the sheet synchronously by using two positioning side hole punches and one progressive hole punch in cooperation with the first punching lower template;

[0015] S2: First trimming of sheet material: Move the sheet material to the first trimming station of the progressive die, and use the first trimming punch to cooperate with the trimming lower template to complete the outer contour processing of one end of the inclined connection seat on the sheet material;

[0016] S3: Second trimming of the sheet: the sheet is moved to the second trimming station of the progressive die, and the outer contour of the other end of the inclined connection seat is processed on the sheet by using the second trimming punch in conjunction with the trimming lower template;

[0017] S4: Sheet bending and rolling: Move the sheet to the bending and rolling station of the progressive die, and the upper bending punch cooperates with the stepped bending cavity on the lower bending table to bend the two ends of the outer contour formed on the sheet downward, and two bends are performed to form two creases, and after bending, there is an inclined surface with an acute angle with the sheet; when bending, the first rolling punch cooperates with the first rolling groove to form a reinforcing convex rib at the top crease position of the inclined surface connection seat forming blank; then move the sheet to the first empty station to wait for the next station processing;

[0018] S5: Secondary calendering of the sheet: the sheet is moved to the calendering station of the progressive die, and the second calendering punch and the third calendering punch cooperate with the second calendering groove and the third calendering groove to form two reinforcing ribs at the bottom crease positions on both sides of the inclined connecting seat forming blank; then the sheet is moved to the second empty station to wait for the next station processing;

[0019] S6: Secondary punching of the sheet: the sheet is moved to the second punching station of the progressive die, and a circular hole, a U-shaped groove and a waist-shaped hole are synchronously formed on the sheet by using a hole expansion punch, a U-shaped punch and a waist-shaped punch on the second punching lower template; then the sheet is moved to the third empty station to wait for the next station processing;

[0020] S7: Sheet cutting: Move the sheet to the cutting station of the progressive die, and use the cutting punch and the cutting lower template to complete the removal of waste between adjacent inclined connection seats, so as to achieve blanking output after the inclined connection seat is formed.

[0021] The advantages of the present invention are:

[0022] 1) In the progressive forming of the bevel connection seat of the present invention, the sheet material is cut in two stations when cutting the edge material, so as to avoid the deformation of the sheet material caused by synchronous cutting, which is not conducive to subsequent processing; in addition, the processing of the crease position of the product is designed in the forming mold and the forming process to form a reinforcing rib, which can increase the strength of the crease position after the product is processed; in addition, in the forming process, an empty station is set after each step of bending, calendering and secondary punching of the bevel connection seat, so as to avoid the continuous processing of the sheet material in a short time, which may cause cracks and deformation of the sheet material; the forming mold and the forming process effectively ensure the qualified rate of the finished products of the bevel connection seat processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 The present invention is a structural diagram of an upper die seat of a progressive forming die of a bevel connection seat.

[0025] Figure 2The present invention is a structural diagram of a lower die seat of a progressive molding die of a bevel connection seat.

[0026] Figure 3 This is a material strip diagram of a ramp connector progressive molding die of the present invention.

[0027] Figure 4 The present invention is a process flow chart of progressive forming of a bevel connection seat. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 3 The illustrated progressive forming die for an inclined surface connecting seat comprises an upper die seat 1, a lower die seat 2, a first punching die 3, a trimming die 4, a bending die 5, a calendering die 6, a second punching die 7 and a cutting die 8.

[0031] A cavity for the sheet material to pass through is formed between the upper die base 1 and the lower die base 2, and the sheet material is one die and one outlet; the cavity between the upper die base 1 and the lower die base 2 is provided with a first punching station 11, a first trimming station 12, a second trimming station 13, a bending and calendering station 14, a first empty station 15, a calendering station 16, a second empty station 17, a second punching station 18, a third empty station 19 and a cutting station 20 in sequence along the extension direction; the first punching die 3 is arranged at the first punching station 11; the trimming die 4 has a pair and is respectively arranged at the first trimming station 12 and the second trimming station 13; the bending die 5 is arranged at the bending and calendering station 14; the calendering die 6 is arranged at the bending and calendering station 14 and the calendering station 16; the second punching die 7 is arranged at the second punching station 18; and the cutting die 8 is arranged at the cutting station 20.

[0032] The first punching die 3 includes a first punching lower template 31, a positioning side hole punch 32 and a progressive hole punch 33; the positioning side hole punch 32 has a pair and is installed at the edge position of the first punching station 11 on the upper die base 1; the progressive hole punch 33 is installed at a position closer to the middle of the first punching station 11 on the upper die base 1, forming a triangular structure with the positioning side hole punch 32; the first punching lower template 31 is installed on the lower die base 2, and the first punching lower template 31 is provided with a first blanking hole 34 corresponding to the positioning side hole punch 32 and the progressive hole punch 33.

[0033] The trimming die 4 includes a first trimming punch 41, a second trimming punch 42 and a trimming lower template 43; the first trimming punch 41 and the second trimming punch 42 are both T-shaped structures; the first trimming punch 41 is arranged at the first trimming station 12 on the upper die base 1, and is used to cut off one side of the edge plate and the gap area between adjacent blanks to form the outer contour of one end of the bevel connecting seat; the second trimming punch 42 is arranged at the second trimming station 13 on the upper die base 1, and is used to cut off the other side of the plate and the gap area between adjacent blanks to form the outer contour of the other end of the bevel connecting seat; the groove depth cut by the first trimming punch 41 on the plate is greater than the groove depth of the second trimming punch 42 on the plate; the trimming lower template 43 is arranged on the lower die base 2, and the trimming lower template 43 is provided with a second blanking hole 44 corresponding to the first trimming punch 41 and the second trimming punch 42.

[0034] The bending die 5 includes an upper bending punch 51 and a lower bending table 52; the upper bending punch 51 has a pair and is respectively installed at the bending and calendering station 14 of the upper die base 1, and the bottom ends of the two upper bending punches 51 extend out of the bottom end surface of the upper die base 1 and form a height difference, and the bottom end of the upper bending punch 51 has a stepped bending surface; the lower bending table 52 is arranged on the lower die base 2, and two stepped bending cavities with a height difference are respectively arranged on the lower bending table 52 corresponding to the two upper bending punches 51; the first calendering groove 53 is arranged at the top crease position of the stepped bending cavity on the side of the first trimming punch 41 on the lower bending table 52.

[0035] The calendering module 6 includes a calendering punch; the calendering punch includes a first calendering punch 61, a second calendering punch 62 and a third calendering punch 63; the first calendering head 61 is arranged at the bending calendering station, and the first calendering head 61 cooperates with the first calendering groove 53 to form a reinforcing rib at the top crease position of the inclined connecting seat forming blank; the second calendering punch 62 and the third calendering punch 63 each have a pair and are respectively arranged on the upper die seat 1 of the calendering station 16, and the second calendering groove 64 and the third calendering groove 65 are respectively arranged on the lower die seat 2 at the calendering station 16 corresponding to the second calendering punch 62 and the third calendering punch 63; the second calendering groove 64 and the third calendering groove 65 are respectively located at the two bottom crease positions of the inclined connecting seat forming blank; the second calendering punch 62 cooperates with the second calendering groove 64, and the third calendering punch 63 cooperates with the third calendering groove 65 to form a reinforcing rib at the two bottom crease positions of the inclined connecting seat forming blank.

[0036] The second punching die 7 includes a second punching lower template 71, a hole expansion punch 72, a U-shaped punch 73 and a waist-shaped punch 74; the hole expansion punch 72, the U-shaped punch 73 and the waist-shaped punch 74 are all installed at the position of the second punching station 18 of the upper die base 1; the hole expansion punch 72 corresponds to the progressive hole on the sheet material, and the U-shaped punch 73 is arranged at the edge position of the side of the second punching station 18, which is used to form a U-shaped groove on the sheet material; the waist-shaped punch 74 is arranged at the middle position of the second punching station 18, which is used to form a waist-shaped groove on the sheet material; the second punching lower template 71 is arranged on the lower die base 2, and the second punching lower template 71 is provided with a third blanking hole 75 corresponding to the hole expansion punch, the U-shaped punch and the waist-shaped punch.

[0037] The cutting die 8 includes a cutting punch 81 and a cutting lower template 82, and the cutting punch 81 is arranged at the cutting station 20 of the upper die base 1; the cutting punch 81 is used to cut the remaining sheet material between adjacent bevel connecting seat blanks; the cutting lower template 82 is installed on the lower die base, and the cutting lower template 82 is provided with a fourth blanking hole 83 corresponding to the cutting punch 81; a blanking guide groove is provided on one side of the cutting die 8 to realize the output of the formed bevel connecting seat from one side of the cutting die.

[0038] The first empty station 15 is the station following the bending and calendering station 14, and the lower die seat 2 of the first empty station 15 is provided with a first sheet material placement seat for the blank that has completed bending and calendering; the second empty station 17 is the station following the calendering station 16, and the lower die seat 2 of the second empty station 17 is provided with a second sheet material placement seat for the blank that has completed calendering; the third empty station 19 is the station following the second punching station 18, and the lower die seat of the third empty station 19 is provided with a third sheet material placement seat after the second punching is completed.

[0039] like Figure 4 As shown: a progressive forming process of a bevel connection seat, the specific forming process is as follows:

[0040] S1: Sheet positioning punching: The sheet is placed from the feed port of the forming die into a one-die-two-outlet progressive die. At the first punching station of the progressive die, two positioning side holes and one progressive hole are formed on the sheet synchronously by using two positioning side hole punches and one progressive hole punch in cooperation with the first punching lower template;

[0041] S2: First trimming of sheet material: Move the sheet material to the first trimming station of the progressive die, and use the first trimming punch to cooperate with the trimming lower template to complete the outer contour processing of one end of the inclined connection seat on the sheet material;

[0042] S3: Second trimming of the sheet: the sheet is moved to the second trimming station of the progressive die, and the outer contour of the other end of the inclined connection seat is processed on the sheet by using the second trimming punch in conjunction with the trimming lower template;

[0043] S4: Sheet bending and rolling: Move the sheet to the bending and rolling station of the progressive die, and the upper bending punch cooperates with the stepped bending cavity on the lower bending table to bend the two ends of the outer contour formed on the sheet downward, and two bends are performed to form two creases, and after bending, there is an inclined surface with an acute angle with the sheet; when bending, the first rolling punch cooperates with the first rolling groove to form a reinforcing convex rib at the top crease position of the inclined surface connection seat forming blank; then move the sheet to the first empty station to wait for the next station processing;

[0044] S5: Secondary calendering of the sheet: the sheet is moved to the calendering station of the progressive die, and the second calendering punch and the third calendering punch cooperate with the second calendering groove and the third calendering groove to form two reinforcing ribs at the bottom crease positions on both sides of the inclined connecting seat forming blank; then the sheet is moved to the second empty station to wait for the next station processing;

[0045] S6: Secondary punching of the sheet: the sheet is moved to the second punching station of the progressive die, and a circular hole, a U-shaped groove and a waist-shaped hole are synchronously formed on the sheet by using a hole expansion punch, a U-shaped punch and a waist-shaped punch on the second punching lower template; then the sheet is moved to the third empty station to wait for the next station processing;

[0046] S7: Sheet cutting: Move the sheet to the cutting station of the progressive die, and use the cutting punch and the cutting lower template to complete the removal of waste between adjacent inclined connection seats, so as to achieve blanking output after the inclined connection seat is formed.

[0047] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A progressive forming die for an inclined surface connection seat, characterized in that: It includes an upper die base, a lower die base, a first punching die, a trimming die, a bending die, a calendering die, a second punching die and a cutting die; A cavity is formed between the upper die seat and the lower die seat for the sheet material to pass through, and the sheet material is one die and one exit; the cavity between the upper die seat and the lower die seat is provided with a first punching station, a first trimming station, a second trimming station, a bending and calendering station, a first empty station, a calendering station, a second empty station, a second punching station, a third empty station and a cutting station in sequence along the extension direction; the first punching die is arranged at the first punching station; the trimming die has a pair and is respectively arranged at the first trimming station and the second trimming station; the bending die is arranged at the bending and calendering station; the calendering die is arranged at the bending and calendering station and the calendering station; the second punching die is arranged at the second punching station; the cutting die is arranged at the cutting station; The first punching die comprises a first punching lower template, a positioning side hole punch and a progressive hole punch; the positioning side hole punch has a pair and is installed at the edge of the first punching station on the upper die base; the progressive hole punch is installed at a position closer to the middle of the first punching station on the upper die base, forming a triangular structure with the positioning side hole punch; the first punching lower template is installed on the lower die base, and the first punching lower template is provided with first blanking holes corresponding to the positioning side hole punch and the progressive hole punch; The trimming die comprises a first trimming punch, a second trimming punch and a trimming lower template; the first trimming punch and the second trimming punch are both T-shaped structures; the first trimming punch is arranged at the first trimming station on the upper die base, and is used to cut off one side of the edge sheet and the gap area between adjacent blanks to form the outer contour of one end of the bevel connecting seat; the second trimming punch is arranged at the second trimming station on the upper die base, and is used to cut off the other side of the sheet and the gap area between adjacent blanks to form the outer contour of the other end of the bevel connecting seat; the groove depth cut by the first trimming punch on the sheet is greater than the groove depth cut by the second trimming punch on the sheet; the trimming lower template is arranged on the lower die base, and the trimming lower template is provided with second blanking holes corresponding to the first trimming punch and the second trimming punch; The bending die comprises an upper bending punch and a lower bending table; the upper bending punch has a pair and is respectively installed at the bending and calendering stations of the upper die seat, and the bottom ends of the two upper bending punches extend out of the bottom end surface of the upper die seat and form a height difference, and the bottom end of the upper bending punch has a stepped bending surface; the lower bending table is arranged on the lower die seat, and two stepped bending cavities with a height difference are respectively arranged on the lower bending table corresponding to the two upper bending punches; the first calendering groove is arranged at the top crease position of the stepped bending cavity on one side of the first trimming punch on the lower bending table; The calendering module includes a calendering punch; the calendering punch includes a first calendering punch, a second calendering punch and a third calendering punch; the first calendering head is arranged at the bending calendering station, and the first calendering head cooperates with the first calendering groove to form a reinforcing convex rib at the top crease position of the inclined surface connecting seat forming blank; the second calendering punch and the third calendering punch each have a pair and are respectively arranged on the upper die seat of the calendering station, and the lower die seat at the calendering station is respectively provided with a second calendering groove and a third calendering groove corresponding to the second calendering punch and the third calendering punch; the second calendering groove and the third calendering groove are respectively located at the two bottom crease positions of the inclined surface connecting seat forming blank; the second calendering punch cooperates with the second calendering groove, and the third calendering punch cooperates with the third calendering groove to form a reinforcing convex rib at the two bottom crease positions of the inclined surface connecting seat forming blank; The second punching die comprises a second punching lower template, a hole-expanding punch, a U-shaped punch and a waist-shaped punch; the hole-expanding punch, the U-shaped punch and the waist-shaped punch are all installed at the position of the second punching station of the upper die seat; the hole-expanding punch corresponds to the progressive hole on the sheet material, the U-shaped punch is arranged at the edge position of the side of the second punching station, and is used to form a U-shaped groove on the sheet material; the waist-shaped punch is arranged at the middle position of the second punching station, and is used to form a waist-shaped groove on the sheet material; the second punching lower template is arranged on the lower die seat, and the second punching lower template is provided with a third blanking hole corresponding to the hole-expanding punch, the U-shaped punch and the waist-shaped punch; The cutting die comprises a cutting punch and a cutting lower template, and the cutting punch is arranged at the cutting station of the upper die base; the cutting punch is used to cut the remaining sheet material between adjacent inclined surface connecting seat blanks; the cutting lower template is installed on the lower die base, and the cutting lower template is provided with a fourth blanking hole corresponding to the cutting punch; a blanking guide groove is provided on one side of the cutting die to realize the output of the formed inclined surface connecting seat from one side of the cutting die.

2. The progressive forming die for the inclined surface connection seat according to claim 1, characterized in that: The first empty station is the station after the bending and calendering station, and the lower die seat of the first empty station is provided with a first sheet material placement seat for the blank that has completed bending and calendering; the second empty station is the station after the calendering station, and the lower die seat of the second empty station is provided with a second sheet material placement seat for the blank that has completed calendering; the third empty station is the station after the second punching station, and the lower die seat of the third empty station is provided with a third sheet material placement seat after the second punching is completed.

3. The progressive forming die for the inclined surface connection seat according to claim 1, characterized in that: The specific molding process using the molding mold is as follows: S1: Sheet positioning punching: The sheet is placed from the feed port of the forming die into a one-die-two-outlet progressive die. At the first punching station of the progressive die, two positioning side holes and one progressive hole are formed on the sheet synchronously by using two positioning side hole punches and one progressive hole punch in cooperation with the first punching lower template; S2: First trimming of sheet material: Move the sheet material to the first trimming station of the progressive die, and use the first trimming punch to cooperate with the trimming lower template to complete the outer contour processing of one end of the inclined connection seat on the sheet material; S3: Second trimming of the sheet: the sheet is moved to the second trimming station of the progressive die, and the outer contour of the other end of the inclined connection seat is processed on the sheet by using the second trimming punch in conjunction with the trimming lower template; S4: Sheet bending and rolling: Move the sheet to the bending and rolling station of the progressive die, and the upper bending punch cooperates with the stepped bending cavity on the lower bending table to bend the two ends of the outer contour formed on the sheet downward, and two bends are performed to form two creases, and after bending, there is an inclined surface with an acute angle with the sheet; when bending, the first rolling punch cooperates with the first rolling groove to form a reinforcing convex rib at the top crease position of the inclined surface connection seat forming blank; then move the sheet to the first empty station to wait for the next station processing; S5: Secondary calendering of the sheet: the sheet is moved to the calendering station of the progressive die, and the second calendering punch and the third calendering punch cooperate with the second calendering groove and the third calendering groove to form two reinforcing ribs at the bottom crease positions on both sides of the inclined connecting seat forming blank; then the sheet is moved to the second empty station to wait for the next station processing; S6: Secondary punching of the sheet: the sheet is moved to the second punching station of the progressive die, and a circular hole, a U-shaped groove and a waist-shaped hole are synchronously formed on the sheet by using a hole expansion punch, a U-shaped punch and a waist-shaped punch on the second punching lower template; then the sheet is moved to the third empty station to wait for the next station processing; S7: Sheet cutting: Move the sheet to the cutting station of the progressive die, and use the cutting punch and the cutting lower template to complete the removal of waste between adjacent inclined connection seats, so as to achieve blanking output after the inclined connection seat is formed.

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