Articulated forming die

Abstract

The invention relates to a hinged type forming die which comprises a lower die base, a first hinge hole, a second hinge hole and a third hinge hole, the lower die base is connected with a female die, and the first end of the female die is provided with a second hinge hole; a male die is connected to the male die fixing seat, and a second hinge hole is formed in the first end of the male die fixing seat; the male die comprises a connecting part and a forming part which are integrally arranged, the connecting part is used for being connected with a male die fixing seat, and the forming part is used for forming the U-shaped groove part; in the direction from the first end of the male die to the second end of the male die, the included angle between the side, away from the fixing part, of the forming part and the side, close to the fixing part, of the forming part is alpha; the first end of the female die is hinged to the first end of the male die fixing base through a hinge shaft. When the hinged type forming die is used for forming a bent part, the safety of the die is improved, the possibility that a plate is torn is reduced, and therefore the qualified product of the die is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of bending forming dies, and in particular to an articulated forming die. Background Art

[0002] In actual production, refer to Figures 1 to 3 The "X"-shaped bending piece includes a U-shaped groove portion and a flange portion connected to the top end of the U-shaped groove portion, and along the length direction of the U-shaped groove portion, the groove bottom of the U-shaped groove portion is inclined at an angle of α relative to the flange portion.

[0003] In the related art, the upper die of the forming mold moves linearly in the vertical direction relative to the lower die. Since the bottom of the U-shaped groove is inclined, the first end and the second end of the punch are not on the same horizontal plane. The first end and the second end of the punch have the same linear speed, and the sheet material is usually placed horizontally on the die. Since the second end of the punch is closer to the sheet material than the first end, during the forming process, the second end of the punch will contact the sheet material before the first end of the punch, which can easily cause the sheet material to jump up and injure people. When the second end of the punch just contacts the sheet material, the contact area between the punch and the sheet material is the smallest, and the impact force on the sheet material is the largest, which can easily cause the sheet material to tear and the qualified product rate to be low. Summary of the invention

[0004] The purpose of the present invention is to provide an articulated forming die, which can solve the technical problems of low safety of bending forming dies and low qualified rate of finished products in the related art.

[0005] The technical solution is as follows: an articulated forming mold, comprising: a lower mold base, a die is connected to the lower mold base, and the first end of the die has a first hinge hole; a punch fixing base, a punch is connected to the punch fixing base, and the first end of the punch fixing base has a second hinge hole; the punch comprises an integrally arranged connecting portion and a forming portion, the connecting portion is used to connect with the punch fixing base, and the forming portion is used to form the U-shaped groove portion; along the direction from the first end of the punch to the second end of the punch, the angle between the side of the forming portion away from the fixing portion and the side of the forming portion close to the fixing portion is α; the first end of the die and the first end of the punch fixing base are hinged by a hinge shaft, and the intersection line of the bottom of the U-shaped groove portion and the flange portion coincides with the central axis of the hinge shaft.

[0006] Optionally, the articulated forming mold further includes an upper mold base, and the upper mold base and the lower mold base are connected via guide pins and guide sleeves.

[0007] Optionally, the top of the punch fixing seat abuts against the lower surface of the upper die seat; the articulated forming mold also includes a side plate, which is fixedly connected to the lower surface of the upper die seat and parallel to the rotation plane of the punch fixing seat; a sliding column is connected to the side of the punch fixing seat, and a sliding groove for the sliding column is provided on the side plate.

[0008] Optionally, there are two side plates, which are distributed on both sides of the rotation plane of the punch fixing seat.

[0009] Optionally, the upper surface of the die is provided with a positioning portion for positioning the sheet material.

[0010] Optionally, the first hinge hole includes a semicircular hole portion and a rectangular hole portion which are connected as a whole from top to bottom, and the width of the rectangular hole portion is equal to the diameter of the semicircular hole portion; the first end of the die is provided with a spring accommodating hole located below the first hinge hole, and a compression spring is arranged in the spring accommodating hole.

[0011] Optionally, the articulated forming mold further comprises a top block, the upper surface of the top block having a downwardly curved semicircular notch, the diameter of the semicircular notch being equal to the diameter of the semicircular hole; the upper end of the compression spring abuts against the bottom of the top block.

[0012] Optionally, the concave mold has a molding groove, and the molding groove passes through the concave mold from top to bottom. The articulated molding mold also includes a lower ejector, and the lower ejector is slidably arranged in the molding groove, and the lower end of the lower ejector abuts against the ejector device of the molding equipment.

[0013] The beneficial effects of the technical solution provided by this application include at least:

[0014] The present application provides an articulated forming mold, comprising: a lower mold base and a punch fixing base. A die is connected to the lower mold base, and the first end of the die has a first hinge hole; a punch is connected to the punch fixing base, and the first end of the punch fixing base has a second hinge hole; the punch includes an integrally arranged connecting portion and a forming portion; along the direction from the first end of the punch to the second end of the punch, the angle between the side of the forming portion away from the fixing portion and the side of the forming portion close to the fixing portion is α; the first end of the die and the first end of the punch fixing base are hinged through a hinge shaft, and the intersection line of the bottom of the U-shaped groove and the flange portion coincides with the central axis of the hinge shaft. When the articulated forming mold disclosed in the present invention is used to form a bent part, since the punch rotates relative to the die, the first end, the second end, and the portion between the first end and the second end of the punch can contact the sheet material at the same time, thereby avoiding the sheet material jumping up and injuring people caused by the second end of the punch contacting the sheet material before the first end in the related art, thereby improving the safety of the mold. At the same time, during the bending process, since the contact area between the end of the punch forming part close to the sheet material and the sheet material remains unchanged, the sheet material is subjected to a more uniform impact force from the punch, thereby reducing the possibility of the sheet material being torn and thus improving the qualified product rate of the mold.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1 It is the main view of the bent part;

[0018] Figure 2 yes Figure 1 Cross-sectional view of the middle bending part at AA;

[0019] Figure 3 It is a three-dimensional diagram of the bent piece;

[0020] Figure 4 is a three-dimensional schematic diagram of an articulated forming mold provided in an embodiment of the present application;

[0021] Figure 5 yes Figure 4 Front view of the middle articulated forming die;

[0022] Figure 6 is a three-dimensional schematic diagram of a concave mold in an articulated forming mold provided in an embodiment of the present application;

[0023] Figure 7 yes Figure 4 Cross-sectional view of the die;

[0024] Figure 8 is a three-dimensional diagram of a punch fixing seat provided in an embodiment of the present application;

[0025] Fig. 9 It is a front view of the male mold provided in an embodiment of the present application;

[0026] Fig.10 yes Fig. 9 Cross-sectional view of the punch at BB;

[0027] Fig.11 is a front view of a side panel provided in an embodiment of the present application;

[0028] Fig.12 is a three-dimensional diagram of a top block provided in an embodiment of the present application;

[0029] Fig.13 It is a front view of the lower top member provided in an embodiment of the present application.

[0030] Description of Reference Numerals

[0031] 1-lower die seat; 2-die; 201-first hinge hole; 2011-semicircular hole portion; 2012-rectangular hole portion; 202-positioning portion; 203-spring accommodating hole; 204-compression spring; 205-through groove; 3-punch fixing seat; 301-second hinge hole; 302-sliding column; 303-punch mounting groove; 4-punch; 401-connecting portion; 402-forming portion; 5-hinge shaft; 6-upper die seat; 7-guide column and guide sleeve; 8-side plate; 801-slide groove; 9-top block; 901-semicircular notch; 10-lower top piece; 11-bending piece; 111-U-shaped groove portion; 112-flange portion; 12-sheet metal. DETAILED DESCRIPTION

[0032] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0033] In the present disclosure, unless otherwise stated, directional words such as "upper and lower" generally refer to the "upper and lower" relative to the direction of gravity when the corresponding parts are in use, and "inside and outside" refer to the "inside and outside" relative to the contours of the corresponding parts themselves. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as limitations on the present disclosure.

[0034] refer to Figures 1 to 3The cross section of the bent piece 11 is in the shape of a "F" and includes a U-shaped groove portion 111 and a flange portion 112 connected to the top of the U-shaped groove portion. Along the length direction of the U-shaped groove portion, the inclination angle of the groove bottom of the U-shaped groove portion relative to the flange portion is α.

[0035] In the related art, the upper die of the forming die moves linearly in the vertical direction relative to the lower die. Since the bottom of the U-shaped groove is inclined, the first end and the second end of the punch are not on the same horizontal plane, and the first end and the second end of the punch have the same linear speed, while the sheet material is usually placed horizontally on the die. Since the second end of the punch is closer to the sheet material than the first end, during the forming process, the second end of the punch will contact the sheet material before the first end of the punch, which may easily cause the sheet material to jump up and injure people. When the second end of the punch just contacts the sheet material, the contact area between the punch and the sheet material is the smallest, and the impact force on the sheet material is the largest, which may easily cause the sheet material to tear. As the punch approaches the die, the contact area between the punch and the sheet material gradually increases, and the impact force on the sheet material gradually decreases, that is, the impact force on the sheet material during the forming process is uneven, which leads to uneven rebound of the bent part after bending, and then leads to large dimensional changes and low qualified product rate. In summary, the forming die in the prior art has low safety and low qualified rate of the bent parts produced.

[0036] The present application provides an articulated forming mold for forming Figures 1 to 3 The cross section shown is a bent piece 11 in the shape of an I-shape, and the bent piece 11 includes a U-shaped groove portion 111 and a flange portion 112 connected to the top of the U-shaped groove portion, and along the length direction of the U-shaped groove portion, the groove bottom of the U-shaped groove portion has an inclination angle α relative to the flange portion.

[0037] Please refer to Figure 4 and Figure 5 The articulated forming mold includes: a lower mold base 1 and a punch fixing base 3. Please continue to refer to Figure 6 and Figure 7 The lower die base 1 is connected to a die 2, and the first end of the die 2 has a first hinge hole 201; please continue to refer to Figures 8 to 10 , a punch 4 is connected to the punch fixing seat 3, and a first end of the punch fixing seat 3 has a second hinge hole 301;

[0038] The punch 4 includes an integrally arranged connection portion 401 and a forming portion 402, wherein the connection portion 401 is used to connect with the punch fixing seat 3, and the forming portion 402 is used to form the U-shaped groove portion 111; along the direction from the first end of the punch 4 to the second end of the punch 4, the angle between the side of the forming portion 402 away from the fixing portion 401 and the side of the forming portion 402 close to the fixing portion 401 is α;

[0039] The first end of the female die 2 and the first end of the male die fixing seat 3 are hinged via the hinge shaft 5 , and the intersection line of the groove bottom of the U-shaped groove portion 111 and the flange portion 112 coincides with the central axis of the hinge shaft 5 .

[0040] In the examples of this application, please refer to Figure 8 A vertical punch mounting groove 303 may be provided on the punch fixing seat 3, referring to Fig. 9 and Fig.10 The punch 4 can be in the shape of a thin sheet, and the punch 4 can be inserted into the punch mounting groove 303 and fixed on the punch fixing seat 3 by locking bolts.

[0041] Please refer to Figure 4 and Figure 5 , the first end of the die 2 and the first end of the punch holder 3 are hinged by the hinge shaft 5, and the intersection line of the bottom of the U-shaped groove 111 and the flange 112 coincides with the central axis of the hinge shaft 5. When the punch 4 rotates relative to the die 2, the first end, the second end, and the portion between the first end and the second end of the punch 4 can contact the sheet 12 at the same time, thereby avoiding the sheet jumping and injuring people caused by the second end of the punch 4 contacting the sheet 12 before the first end in the related art, thereby improving the safety of the mold. At the same time, during the bending process, since the contact area between the end of the forming part 402 of the punch 4 close to the sheet 12 and the sheet 12 remains unchanged, the sheet 12 is subjected to a relatively uniform impact force of the punch 4, which reduces the possibility of the sheet 12 being torn, and the springback amount of the bent part 11 after forming is relatively uniform, thereby improving the qualified product rate of the mold.

[0042] In the examples of this application, please refer to Figure 4 and Figure 5 The articulated forming mold may further include an upper die base 6, and the upper die base 6 and the lower die base 1 are connected by guide pins and guide sleeves 7. In this embodiment, a punch press with a wide range of uses is used as the forming equipment. In practice, other forming equipment, such as a hydraulic press, may also be selected according to the actual conditions of the formed part. In this embodiment, during the downward movement of the upper die base 6, since the upper die base 6 and the lower die base 1 are connected by guide pins and guide sleeves 7, it is ensured that the upper die base 6 can make a linear motion.

[0043] In the examples of this application, please refer to Figure 4 and Figure 5 The top of the punch holder 3 abuts against the lower surface of the upper die holder 6. When the upper die holder 6 is in the downward process, the upper die holder 6 presses the punch holder 3 downward, so that the punch holder 3 rotates. The friction between the top of the punch holder 3 and the lower surface of the upper die holder 6 can be reduced by applying grease, or by installing a roller on the top of the punch holder 3 to reduce the friction, which is not limited in the present disclosure.

[0044] In order to facilitate the reset of the punch 3 after the mold is opened, the articulated forming mold may also include a side plate 8, which is fixedly connected to the lower surface of the upper mold base 6 and is parallel to the rotation plane of the punch fixing base 3; please continue to refer to Figure 5 and Fig.11 , the side of the punch fixing seat 3 is connected with a slide post 302, and the side plate 8 is provided with a slide groove 801 for the slide post 302 to slide. In this case, when the upper die seat 6 moves upward, the side plate 8 can be driven upward, and during the upward movement of the side plate 8, the slide post 302 is driven to move upward and move in the slide groove 801 of the side plate 8, thereby opening the articulated forming mold and resetting the punch 3.

[0045] In the examples of this application, please refer to Figure 4 , the number of the side plates 8 is two, and the two side plates 8 are distributed on both sides of the rotation plane of the punch holder 3. In this case, the punch holder 3 is stressed more evenly, thereby being able to ensure the mold accuracy of the articulated forming mold.

[0046] In the examples of this application, please refer to Figure 6 and Figure 7 , the upper surface of the die 2 is provided with a positioning portion 202 for positioning the sheet 12. By providing the positioning portion 202 on the die 2, on the one hand, the sheet 12 can be accurately positioned, and on the other hand, the sheet 12 can be prevented from shifting during the forming process. The positioning portion 202 can be a sinking groove provided on the upper surface of the die 2, and the shape of the sinking groove matches the shape of the sheet 12; if the bending part 11 itself has a hole, the existing hole on the sheet 12 can be used for positioning before bending. At this time, the positioning portion 202 can be a positioning pin provided on the upper surface of the die 2, and the height of the positioning pin is about half of the thickness of the sheet and not less than 1.5 mm.

[0047] In order to better protect the articulated forming mold and avoid damage to the mold caused by the articulated forming mold being closed without placing the sheet material 12, in the embodiment of the present application, please refer to Figure 6 and Figure 7 The first hinge hole 201 includes a semicircular hole portion 2011 and a rectangular hole portion 2012 which are connected as a whole from top to bottom, and the width of the rectangular hole portion 2012 is equal to the diameter of the semicircular hole portion 2011; the first end of the die 2 is provided with a spring accommodating hole 203 located below the first hinge hole 201, and a compression spring 204 is provided in the spring accommodating hole 203.

[0048] Since the articulated forming mold is designed on the premise that there is a sheet material 12 on the die, that is, after the sheet material 12 is placed on the die 2, the central axis of the hinge shaft 5 is at the same horizontal plane as the upper surface of the sheet material 12. When the mold is closed with the sheet material 12 on the die 2, the compression spring 204 applies an upward thrust to the hinge shaft 5, and the punch holder 3 rotates with the punch 4 around the central axis of the semicircular hole 2011. At this time, the sheet material 12 and the hinge shaft 5 jointly bear the punching force of the forming equipment, so the impact force on the hinge shaft 5 is small and will not be damaged. When the mold is closed without placing the sheet material 12 due to misoperation, after the punch 3 moves to contact the upper surface of the die 2, the upper mold holder 6 will continue to move downward. If the first hinge hole 201 does not have a rectangular hole 2012, the punching force of the forming equipment will be fully applied to the hinge shaft 5, so that the hinge shaft 5 is damaged by shear force. In this embodiment, since the first hinge hole 201 has a rectangular hole portion 2012, when the upper die seat 6 continues to move downward, the hinge shaft 5 will move downward along the rectangular hole portion 2012 of the first hinge hole 201, thereby preventing the hinge shaft 5 from being damaged by shear force, thereby protecting the hinged forming mold. It should be noted that in the embodiment of the present application, a compression spring 204 with a large stiffness needs to be selected so that the hinge shaft 5 is always in the semicircular portion 2011 of the first hinge hole 201 under the reaction force of the compression spring 204.

[0049] In the examples of this application, please refer to Figure 4 and Fig.12 The articulated forming mold may further include a top block 9, the upper surface of which has a downwardly curved semicircular notch 901, the diameter of which is equal to the diameter of the semicircular hole 2011, and the upper end of the compression spring 204 abuts against the bottom of the top block 9. In this case, since the top block 9 is provided between the compression spring 204 and the hinge shaft 5, direct contact between the compression spring 204 and the hinge shaft 5 is avoided, thereby reducing noise during mold opening and mold closing, and also extending the life of the compression spring 204.

[0050] In the examples of this application, please refer to Figure 5The die 2 has a molding groove 205, which runs through the die 2 from top to bottom. The articulated molding mold may also include a lower ejector 10, which is slidably arranged in the molding groove 205, the upper end of the lower ejector 10 is flush with the upper surface of the die 2, and the lower end of the lower ejector 10 abuts against the ejector of the molding equipment. The ejector may be a spring or a polyurethane pad. In this way, during the molding process of the bent piece 11, since the lower ejector 10 abuts against the lower surface of the sheet 12, the punch 4 is pressed against the upper surface of the sheet 12, so that the sheet 12 can be reliably clamped. Since the lower end of the lower ejector 10 abuts against the ejector of the molding equipment, during the downward movement of the punch 4, the lower ejector 10 can also descend with the downward movement of the punch 4, thereby ensuring that the lower ejector 10 is always in contact with the lower surface of the sheet 12 during the molding process. After the molding is completed, under the action of the ejector, the ejector drives the lower ejector 10 upward to eject the bent piece 11 out of the die 2. The lower ejector 10 can position and fix the sheet material 12 during the forming process, thereby improving the qualified product rate of the bent part 11 formed by the articulated forming mold.

[0051] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0053] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An articulated forming die for forming a bent part (11), the bent part (11) comprising a U-shaped groove (111) and a flange (112) connected to the top of the U-shaped groove (111), and along the length direction of the U-shaped groove (111), the groove bottom of the U-shaped groove (111) relative to the flange (112) has an inclination angle of α, characterized in that: The articulated forming die comprises: A lower die base (1), the lower die base (1) being connected to a die (2), the first end of the die (2) having a first hinge hole (201); A punch fixing seat (3), the punch fixing seat (3) being connected to a punch (4), and the first end of the punch fixing seat (3) having a second hinge hole (301); The punch (4) comprises an integrally arranged connecting portion (401) and a forming portion (402), wherein the connecting portion (401) is used to connect to the punch fixing seat (3), and the forming portion (402) is used to form the U-shaped groove portion (111); along the direction from the first end of the punch (4) to the second end of the punch (4), the angle between the side of the forming portion (402) away from the fixing portion (401) and the side of the forming portion (402) close to the fixing portion (401) is α; The first end of the female mold (2) and the first end of the male mold fixing seat (3) are hinged via a hinge shaft (5), and the intersection line between the bottom of the U-shaped groove portion (111) and the flange portion (112) coincides with the central axis of the hinge shaft (5).

2. The articulated forming mold according to claim 1, characterized in that: The articulated forming die also includes an upper die base (6), and the upper die base (6) and the lower die base (1) are connected via guide pillars and guide sleeves (7).

3. The articulated forming mold according to claim 2, characterized in that: The top of the punch fixing seat (3) abuts against the lower surface of the upper die seat (6); the articulated forming mold further comprises a side plate (8), the side plate (8) is fixedly connected to the lower surface of the upper die seat (6) and is parallel to the rotation plane of the punch fixing seat (3); The side of the punch fixing seat (3) is connected with a sliding column (302), and the side plate (8) is provided with a sliding groove (801) for the sliding column (302) to slide.

4. The articulated forming mold according to claim 3, characterized in that: The number of the side plates (8) is two, and the two side plates (8) are distributed on both sides of the rotation plane of the punch fixing seat (3).

5. The articulated forming mold according to claim 1, characterized in that: The upper surface of the concave mold (2) is provided with a positioning portion (202) for positioning the sheet material (11).

6. The articulated forming mold according to claim 1, characterized in that: The first hinge hole (201) comprises a semicircular hole portion (2011) and a rectangular hole portion (2012) which are connected as one from top to bottom, and the width of the rectangular hole portion (2012) is equal to the diameter of the semicircular hole portion (2011); The first end of the female mold (2) is provided with a spring receiving hole (203) located below the first hinge hole (201), and a compression spring (204) is provided in the spring receiving hole (203).

7. The articulated forming mold according to claim 2, characterized in that: The hinged forming mold also includes a top block (9), the upper surface of the top block (9) has a downwardly curved semicircular notch (901), the diameter of the semicircular notch (901) is equal to the diameter of the semicircular hole portion (2011); the upper end of the compression spring (204) abuts against the bottom of the top block (9).

8. The articulated forming mold according to claim 1, characterized in that: The concave mold (2) has a molding groove (205), and the molding groove (205) passes through the concave mold (2) from top to bottom. The articulated molding mold also includes a lower ejector (10), and the lower ejector (10) is slidably arranged in the molding groove. The lower end of the lower ejector (10) abuts against the ejector of the molding equipment.

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