A universal main and auxiliary structure forging quick-change die set

Abstract

The present invention relates to the field of forging technology, and specifically to a universal main-sub structure forging quick-change die frame, including: a die frame main body component, which is divided into an upper die frame and a lower die frame, and both the upper and lower die frames are main and sub die frame structures; a clamping and lifting system component, which includes a plurality of upper clamping cylinders installed in the upper main die frame, a plurality of lower clamping cylinders installed in the lower main die frame, and a plurality of ejection cylinders installed in the lower main die frame; a positioning system component, which includes a circular positioning key and a square circular positioning key installed in the main die frame; an ejection system component, which includes a plurality of first ejection plates, a plurality of first ejector rods, a plurality of springs, and a plurality of second ejection plates installed in the main die frame; a guide system component, which includes an upper guide column installed in the upper main die frame, and a lower guide column installed in the lower main die frame. The universal quick-change die frame of the present invention can realize quick replacement of forging dies and rapid production conversion, adapt to thermal expansion and contraction of hot forging production, and has universality, and can be applied to forging production of various products.

Description

Technical Field

[0001] The invention relates to the technical field of forging, and in particular to a universal main-and-auxiliary structure quick-change die frame. Background Art

[0002] The speed of die replacement determines the speed of production conversion in forging production, and ultimately determines the production efficiency of the forging line. The traditional die replacement method is to pull out the entire die frame, then manually replace the new die, and then push the die frame into the press for manual locking. Due to the cumbersome process, manual clamping is required. It takes about two hours to replace the die. After the die is replaced, it needs to be baked. The overall die replacement time often takes 6 to 8 hours. This die replacement method increases labor intensity and reduces production efficiency.

[0003] Due to limitations such as the clamping method and ejection structure of the mold, traditional mold frame structures are often only targeted at specific products and are not universal. The production of new products often requires the design and manufacture of new mold frames, which increases the investment cost of the mold frame.

[0004] In addition, due to the characteristics of forging production as hot processing, the heat conduction during the production process causes the upper and lower die bases to expand differently, thus causing positioning and guiding interference. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a universal quick-change die frame for forging production, which can realize quick die change and rapid production conversion, adapt to thermal expansion and contraction of hot forging production, and has versatility. It can be applied to the forging production of various products, especially suitable for the production of small batches and multiple varieties of products.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0007] A universal main and auxiliary structure forging quick-change die set, characterized by comprising:

[0008] The die frame main body component is divided into an upper die frame part and a lower die frame part. Both the upper and lower die frame parts are main and auxiliary die frame structures. The upper die frame part includes an upper main die frame and an upper auxiliary die frame, and the lower die frame part includes a lower main die frame and a lower auxiliary die frame. The molds are respectively installed in the upper auxiliary die frame and the lower auxiliary die frame to forge and shape the forgings;

[0009] A clamping and lifting system assembly includes a plurality of upper clamping cylinders installed in the upper main mold frame, a plurality of lower clamping cylinders installed in the lower main mold frame, and a plurality of ejection cylinders installed on the lower main mold frame, wherein the upper clamping cylinders are used to releasably clamp the upper sub-mold frame to the upper main mold frame, the lower clamping cylinders are used to releasably clamp the lower sub-mold frame to the lower main mold frame, and the ejection cylinders are used to lift the lower sub-mold frame to a certain height;

[0010] A positioning system assembly, comprising a circular positioning key and a square circular positioning key respectively installed in the upper main mold frame and the lower main mold frame, for providing a positioning function when the upper and lower auxiliary mold frames are installed on the upper and lower main mold frames;

[0011] An ejection system assembly, comprising a plurality of first upper ejection plates, a plurality of first upper ejector rods, a plurality of springs and a plurality of second upper ejection plates installed in the upper main die frame for ejecting the forging, wherein the springs function to return the upper ejection system assembly after ejection, and a plurality of first lower ejection plates, a plurality of first lower ejector rods and a plurality of second lower ejection plates installed in the lower main die frame for ejecting the forging;

[0012] The guide system component comprises an upper guide column installed in the upper main die frame and a lower guide column installed in the lower main die frame. The guide system component is used to provide a guide function for the upper and lower dies of forging.

[0013] In the above-mentioned universal main-sub-structure forging quick-change die frame, the upper main die frame is installed on the upper slider of the press, and the lower main die frame is installed on the workbench of the press; after the upper and lower sub-die frames equipped with the mold are pushed into the press, the upper main die frame is driven down by the upper slider and pressurized by the upper clamping cylinder and the lower clamping cylinder, so that the upper sub-die frame and the upper main die frame, as well as the lower sub-die frame and the lower main die frame are fastened together; when the mold is replaced, the upper and lower sub-die frames are respectively disengaged from the upper and lower main die frames by relieving the pressure by the upper clamping cylinder and the lower clamping cylinder, and the upper and lower sub-die frames are driven up by the upper slider and the upper and lower sub-die frames that are buckled together are lifted to a certain height by the ejection cylinder, so that the buckled upper and lower sub-die frames can be pulled out of the press to replace the mold.

[0014] In the above-mentioned universal main-auxiliary structure forging quick-change die frame, the clamping cylinder of the clamping and jacking system component is a transfer pull-down cylinder, and the cylinder rod has a T-shaped head that can be rotated 90 degrees.

[0015] In the above-mentioned universal main and auxiliary structure forging quick-change die frame, the circular positioning key is cylindrical, one end of the square circular positioning key is cylindrical and the other end is square, and the cylindrical end is installed on the main die frame, and a gap is left at both ends of the keyway of the auxiliary die frame that cooperates with the square end to allow for thermal expansion.

[0016] In the above-mentioned universal main and auxiliary structure forging quick-change die frame, the first ejector plate and the second ejector plate of the ejector system component are perpendicular to each other in the length extension direction, wherein the first ejector plate covers the position of the press ejector rod, and the second ejector plate covers the forging ejection position.

[0017] In the above-mentioned universal main and auxiliary structure forging quick-change die frame, the first ejector plates are arranged in parallel in no less than two rows, the second ejector plates are arranged according to process requirements, and no less than two rows are arranged in parallel in each step, and the first ejector rod is located at the junction of the first ejector plate and the second ejector plate.

[0018] In the above-mentioned universal main-auxiliary structure forging quick-change die frame, the guide surface of the guide column forms an angle of 45° with the longitudinal center lines of the upper main die frame and the lower main die frame.

[0019] In the above-mentioned universal main-auxiliary structure forging quick-change die frame, the upper and lower guide columns and the upper and lower main die frames adopt a split installation mode, and the upper and lower guide columns are disengaged when the press slide returns to the upper position.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. The general-purpose main and auxiliary structure forging quick-change die frame provided by the present invention comprises: a die frame main body component, which is used for forging and forming forgings, and the die frame main body is divided into an upper die frame and a lower die frame, and the upper and lower die frames are both main and auxiliary die frame structures, wherein the upper die frame part comprises an upper main die frame and an upper auxiliary die frame, and the lower die frame part comprises a lower main die frame and a lower auxiliary die frame; a clamping and lifting system component, which comprises a plurality of upper clamping cylinders installed in the upper main die frame, a plurality of lower clamping cylinders installed in the lower main die frame, and a plurality of ejection cylinders, wherein the upper clamping cylinder is used to install the upper auxiliary die frame to the upper main die frame, the lower clamping cylinder is used to install the lower auxiliary die frame to the lower main die frame, and the ejection cylinder is used to lift the auxiliary die frame to a certain height. The structural design of the main and auxiliary die frames only requires replacing the auxiliary die frame when changing the die, which avoids the high die frame cost required by the traditional method of replacing the entire die frame, and reduces the investment in the die frame; and the auxiliary die frame is installed on the main die frame through the clamping cylinder, which can realize the rapid clamping of the die frame and reduce the die changing time.

[0022] 2. The universal main and auxiliary structure forging quick-change die frame provided by the present invention, the clamping cylinder of the clamping and lifting system assembly is a transfer pull-down cylinder, and the cylinder rod has a T-head that can rotate 90 degrees. When replacing the mold, the upper and lower clamping cylinders are depressurized, the T-head of the cylinder rod is loosened and rotated 90 degrees, the upper auxiliary die frame falls onto the lower auxiliary die frame, and multiple lower ejection cylinders lift the upper and lower auxiliary die frames to a height exceeding the positioning keys installed on the lower main die frame, so that the guide rollers of the die-changing vehicle can extend from the bottom of the lower auxiliary die frame and support the auxiliary die frame, and then pull the upper and lower auxiliary die frames out of the press to achieve rapid die change. For the positioning method using positioning keys between the main and auxiliary die frames, since the keys have a certain height, the lower ejection cylinders are required to lift and pull out the auxiliary die frame. This design is simple in structure and easy to implement on the basis of solving this problem.

[0023] 3. The universal main and auxiliary structure forging quick-change die frame provided by the present invention also includes a round positioning key and a square and round positioning key for ensuring the positional relationship between the auxiliary die frame and the main die frame. During the forging process, due to the different temperature rises between the main and auxiliary die frames, the round key is used to ensure the positioning accuracy between the main and auxiliary die frames in all directions. The square and round key has a certain amount of clearance in the length direction while ensuring the positioning accuracy in the width direction. Therefore, it can adapt to the misalignment between the main and auxiliary die frames caused by thermal expansion and contraction in the length direction, and avoid positioning interference.

[0024] 4. The universal main and auxiliary structure forging quick-change die frame provided by the present invention also includes an ejection system component, wherein the first ejection plate and the second ejection plate of the ejection system component are perpendicular to each other in the length extension direction, wherein the first ejection plate covers the ejector position of the press, and the second ejection plate covers the ejection position of the forging. This structure can adapt to the ejection position of the press and meet the ejection needs of the forging die, so it is flexible and suitable for a variety of presses and forging production of different products, thereby improving the applicability and practicality of the die frame.

[0025] 5. The universal main and auxiliary structure forging quick-change die frame provided by the present invention has two parallel rows of the first ejector plates, four parallel rows of the second ejector plates, and the first ejector rod is located at the junction of the first ejector plate and the second ejector plate. This structure can ensure that the ejector plate does not deflect, thereby ensuring that the ejector rods can be ejected at the same time, so that the ejection effect is better.

[0026] 6. In the universal main-sub structure forging quick-change die frame provided by the present invention, a guide column perpendicular to the ejector plate is provided in the middle part of the first lower ejector plate, and a guide groove is provided at the corresponding part of the lower main die frame. This structure can prevent the first ejector plate in the lower main die frame from deflecting, thereby causing the first lower ejector rod to deflect and become stuck, causing the forging to be unable to be ejected, or the ejector rod cannot be retracted after ejection, thereby affecting production.

[0027] 7. In the universal main and auxiliary structure forging quick-change die frame provided by the present invention, the guide surface of the guide column forms an angle of 45° with the center line of the die frame. During forging, due to the different heating of the upper and lower dies, the thermal expansion and contraction of the upper and lower die bases are also different. The 45° guide setting can make the guide surfaces of the upper and lower die base guide columns shift outward or inward along the 45° direction, which can ensure that the guide does not interfere after the die frame expands and contracts, and the guide accuracy can still be maintained.

[0028] 8. The universal main and auxiliary structure forging quick-change die frame provided by the present invention adopts a split installation mode with the guide column and the main die frame, and the upper and lower guide columns are disengaged when the press slide returns to the upper position. The split installation mode can reduce the blank size of the die frame and reduce the investment cost of the die frame. In addition, this structural form is flexible, and it is easy to replace and maintain if the guide column is damaged by long-term use; the design structure in which the upper and lower guide columns are disengaged when the press slide returns to the upper position has a larger operating space and is more conducive to realizing automated operation compared to the full-guide structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A front and sectional view of a universal main and auxiliary structure forging quick-change die frame provided by the present invention;

[0031] Figure 2 for Figure 1 The left side sectional view of the universal main and auxiliary structure forging quick change die set shown;

[0032] Figure 3 for Figure 1 The top view of the lower main and auxiliary die frames of the universal main and auxiliary structure forging quick-change die frame is shown.

[0033] Figure 4 for Figure 1 Schematic diagram of the action of the upper and lower clamping cylinders.

[0034] Figure 5 for Figure 1 Schematic diagram of the thermal expansion of the square round positioning key.

[0035] Description of reference numerals:

[0036] 1-upper main mold frame; 2-circular positioning key; 3-first upper ejector plate; 4-first upper ejector rod; 5-spring; 6-second upper ejector plate; 7-square and circular positioning key; 8-upper clamping cylinder; 9-upper auxiliary mold frame; 10-lower auxiliary mold frame; 11-lower main mold frame; 12-lower clamping cylinder; 13-second lower ejector plate; 14-first lower ejector rod; 15-first lower ejector plate; 16-lower ejector cylinder; 17-upper guide column; 18-lower guide column; 19-mold assembly; 20-press ejector rod DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] like Figure 1-3 The figure shows a specific embodiment of a universal main and auxiliary structure forging quick-change die frame involved in the present invention. The quick-change die frame includes a die frame main body component, a clamping and lifting system component, a positioning system component, an ejection system component and a guide system component.

[0040] In this embodiment, the mold frame main body assembly includes: an upper main mold frame 1, an upper auxiliary mold frame 9, a lower main mold frame 11, and a lower auxiliary mold frame 10. The mold 19 will be installed in the upper auxiliary mold frame 9 and the lower auxiliary mold frame 10 respectively.

[0041] In this embodiment, the clamping and lifting system assembly includes a plurality of upper clamping cylinders 8, a plurality of lower clamping cylinders 12 and a plurality of lower ejection cylinders 16. The plurality of upper clamping cylinders 8 are mounted on the upper main mold frame 1 by bolts, the plurality of lower clamping cylinders 12 are mounted on the lower main mold frame 11 by bolts, and the plurality of lower ejection cylinders 16 are also mounted on the lower main mold frame 11 by bolts.

[0042] Furthermore, the upper clamping cylinder 8 and the lower clamping cylinder 12 are indexing and pulling-down cylinders, and the cylinder rods have T-shaped heads that can rotate 90°. Figure 4 It is a schematic diagram of the action of the transfer and pull-down cylinder.

[0043] In this embodiment, the positioning system assembly includes a circular positioning key 2 and a square circular positioning key 7, which are used to position the auxiliary mold frame when it is installed on the main mold frame. The upper main mold frame 1 and the lower main mold frame 11 are each installed with a set of circular positioning keys 2 and square circular positioning keys 7 by screws.

[0044] Furthermore, the circular positioning key 2 is cylindrical, one end of the square circular positioning key 7 is cylindrical and the other end is square, and the cylindrical end is mounted on the main mold frame 1, 11, and the two ends of the keyway of the secondary mold frame 9, 10 matched with the square end leave a gap for thermal expansion, such as Figure 5 shown.

[0045] In this embodiment, the ejection system assembly includes a plurality of first upper ejection plates 3, a plurality of first upper ejector rods 4, a plurality of springs 5 ​​and a plurality of second upper ejection plates 6 installed in the upper main mold frame 1, wherein the function of the spring 5 is to return the upper ejection system assembly to its original position after ejection. Since the ejection system in the lower mold base can be reset under the action of its own weight, the lower mold base is not provided with a spring. The first upper ejector rod 4 and the second upper ejection plate 6 are connected by welding or threading; and the ejection system assembly also includes a plurality of first lower ejection plates 15, a plurality of first lower ejector rods 14 and a plurality of second lower ejection plates 13 installed in the lower main mold frame 11, wherein the first lower ejector rods 14 and the second lower ejection plate 13 are connected by welding or threading.

[0046] Furthermore, the spring 5 in the upper main mold frame 1 is a helical compression spring.

[0047] Furthermore, the first ejector plate 3, 15 and the second ejector plate 6, 13 of the ejector system assembly are perpendicular to each other in the length extension direction, wherein the first ejector plate 3, 15 covers the position of the press ejector pin (20), the second ejector plate 6, 13 covers the forging ejection position, and the first ejector pin 4, 14 is located at the junction of the first ejector plate 3, 15 and the second ejector plate 6, 13. When the forging is ejected, the press ejector pin lifts the first ejector plate 3, 15, and pushes the second ejector plate 6, 13 through the first ejector pin 4, 14, and the second ejector plate pushes the ejector pin installed in the mold, thereby realizing the ejection of the forging.

[0048] Furthermore, according to the number of ejector pins of the press, the first ejector plates 3, 15 are arranged in parallel in two or more rows, but in order to maintain ejection balance, the number of the first ejector plates 3, 15 must be greater than two rows.

[0049] Furthermore, the number of the second ejector plates 6 and 13 is set according to different forging processes. Due to the different forging processes of different forgings, some forgings only need to be formed once, while others need to be formed multiple times. Each forming requires a set of forming dies. In order to maintain ejection balance, each set of dies needs to be provided with two rows of second ejector plates, that is, if only one forming is required, the second ejector plates 6 and 13 are arranged in two rows in parallel. If two formings are required, the second ejector plates 6 and 13 are arranged in four rows in parallel. Figure 3 As shown, and so on.

[0050] In this embodiment, the guide surfaces of the guide columns 17 and 18 form an angle of 45° with the longitudinal center lines of the upper main mold frame and the lower main mold frame, and the guide columns and the main mold frames are installed in a split mode, wherein the upper guide column 17 is installed on the upper main mold frame 1, and the lower guide column 18 is installed on the lower main mold frame 11.

[0051] The mold installation method in this embodiment is to first install the clamping and lifting system components, the positioning system components, the ejection system components and the guide system components to the upper main mold frame 1 and the lower main mold frame 11 in sequence, and then install the upper main mold frame 1 to the upper slider of the press, and install the lower main mold frame 11 to the workbench of the press. Next, the forging mold is clamped to the upper sub-mold frame 9 and the lower sub-mold frame 10 respectively, and the upper sub-mold frame 9 with the mold installed is turned 180 degrees and snapped together with the lower sub-mold frame with the mold installed, and the upper and lower sub-mold frames snapped together are pushed into the press, and the corresponding key slots of the lower sub-mold frame 10 are aligned with the positioning keys 2 and 7 installed on the lower main mold frame 11, and the lower sub-mold frame 10 falls on the lower main mold frame 11, and the positioning keys 2 and 7 on the lower main mold frame 11 enter the key slots of the lower sub-mold frame 10. Then the upper slider drives the upper main mold frame 1 to descend, and the positioning keys 2, 7 installed on the upper main mold frame 1 enter the corresponding key grooves of the upper sub-mold frame 9, and make the upper sub-mold frame 9 completely contact with the upper main mold frame 1. Then, after the cylinder rods of the clamping cylinders 8, 12 in the upper and lower main mold frames rotate 90 degrees, the cylinder rods are pulled down to fasten the upper sub-mold frame 9 to the upper main mold frame 1, the lower sub-mold frame 10 and the lower main mold frame 11 respectively.

[0052] In this embodiment, when replacing the mold, the upper slide block descends until the upper and lower auxiliary mold frames 9 and 10 are in contact, and then the upper and lower clamping cylinders are depressurized, and the T-head of the cylinder rod is loosened and rotated 90 degrees, so that the upper and lower auxiliary mold frames 9 and 10 are disengaged from the upper and lower main mold frames 1 and 11 respectively, and the upper slide block drives the upper main mold frame 1 to be lifted to the upper dead center, and then multiple lower ejection cylinders 16 lift the upper and lower auxiliary mold frames to a height exceeding the positioning keys 2 and 7 of the lower main mold frame 11, and then the upper and lower auxiliary mold frames 1 and 11 that are buckled together can be pulled out of the press to achieve rapid mold change.

Claims

1. A universal main and auxiliary structure forging quick-change die set, characterized in that: include: A die frame main body component, wherein the die frame main body is divided into an upper die frame part and a lower die frame part, and both the upper and lower die frame parts are main and auxiliary die frame structures, wherein the upper die frame part comprises an upper main die frame (1) and an upper auxiliary die frame (9), and the lower die frame part comprises a lower main die frame (11) and a lower auxiliary die frame (10), and the molds are respectively installed in the upper auxiliary die frame (9) and the lower auxiliary die frame (10) for forging and forming the forging; A clamping and lifting system component comprises a plurality of upper clamping cylinders (8) installed in an upper main mold frame (1), a plurality of lower clamping cylinders (12) installed in a lower main mold frame (11), and a plurality of ejection cylinders (16) installed on the lower main mold frame, wherein the upper clamping cylinders (8) are used to releasably clamp the upper auxiliary mold frame (9) to the upper main mold frame (1), the lower clamping cylinders (12) are used to releasably clamp the lower auxiliary mold frame (10) to the lower main mold frame (11), and the ejection cylinders (16) are used to lift the lower auxiliary mold frame to a certain height; A positioning system component comprises a circular positioning key (2) and a square circular positioning key (7) respectively installed in an upper main mold frame (1) and a lower main mold frame (11), and is used to provide a positioning function when the upper and lower auxiliary mold frames (9, 10) are installed on the upper and lower main mold frames (1, 11); An ejection system component comprises a plurality of first upper ejection plates (3) installed in an upper main die frame (1) and used for ejecting a forged piece, a plurality of first upper ejector rods (4), a plurality of springs (5) and a plurality of second upper ejection plates (6), wherein the springs (5) function to return the upper ejection system component to its original position after ejection, and a plurality of first lower ejection plates (15), a plurality of first lower ejector rods (14) and a plurality of second lower ejection plates (13) installed in a lower main die frame (11) and used for ejecting a forged piece; The first ejector plate (3, 15) and the second ejector plate (6, 13) of the ejector system component are perpendicular to each other in the length extension direction, wherein the first ejector plate (3, 15) covers the position of the press ejector rod (20), and the second ejector plate (6, 13) covers the forging ejection position, the first ejector plates (3, 15) are arranged in parallel in no less than two rows, the second ejector plates (6, 13) are arranged according to process requirements, and no less than two rows are arranged in parallel in each step, and the first ejector rod (4, 14) is located at the junction of the first ejector plate (3, 15) and the second ejector plate (6, 13); The guide system component comprises an upper guide column (17) installed in an upper main die frame (1) and a lower guide column (18) installed in a lower main die frame (11). The guide system component is used to provide a guide function for upper and lower dies of forging.

2. The universal main and auxiliary structure forging quick-change die set according to claim 1 is characterized in that: The upper main mold frame (1) is mounted on the upper slider of the press, and the lower main mold frame (11) is mounted on the working table of the press; after the upper and lower auxiliary mold frames equipped with the mold are pushed into the press, the upper main mold frame is driven downward by the upper slider and pressurized by the upper clamping cylinder and the lower clamping cylinder, so that the upper auxiliary mold frame and the upper main mold frame, as well as the lower auxiliary mold frame and the lower main mold frame are fastened together; when the mold is replaced, the upper and lower auxiliary mold frames are respectively disengaged from the upper and lower main mold frames by relieving the pressure by the upper clamping cylinder and the lower clamping cylinder, and the upper and lower auxiliary mold frames are driven upward by the upper slider and lifted to a certain height by the ejection cylinder, so that the upper and lower auxiliary mold frames that are buckled together can be pulled out of the press to replace the mold.

3. The universal main and auxiliary structure forging quick-change die set according to claim 1 is characterized in that: The clamping cylinders (8, 12) of the clamping and jacking system components are indexable pull-down oil cylinders, and the oil cylinder rods are provided with T-shaped heads which can be rotated 90 degrees.

4. The universal main and auxiliary structure forging quick-change die set according to claim 1 is characterized in that: The circular positioning key (2) is cylindrical, one end of the square circular positioning key (7) is cylindrical and the other end is square, and the cylindrical end is mounted on the main mold frame (1, 11), and a gap for thermal expansion is left at both ends of the keyway of the secondary mold frame (9, 10) that matches the square end.

5. The universal main and auxiliary structure forging quick-change die set according to claim 1 is characterized in that: The guide surface of the guide column forms an angle of 45° with the longitudinal center lines of the upper main mold frame (1) and the lower main mold frame (11).

6. The universal main and auxiliary structure forging quick-change die set according to claim 1 is characterized in that: The upper and lower guide columns (17, 18) and the upper and lower main mold frames (1, 11) are installed in a split mode, and the upper and lower guide columns are disengaged when the slide block of the press returns to the upper position.

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