Same-star bending machine and bending method thereof

Abstract

According to the same-star bending machine and the bending method thereof, the same-star bending machine comprises a rack, a tooth shifting mechanism and two bending mechanisms, the tooth shifting mechanism and the two bending mechanisms are located on the rack, each bending mechanism comprises a fixing part and a bending part, and the fixing parts are used for clamping a plate between two adjacent bending parts of a to-be-bent product; the bending part comprises a bending frame and a bending driving part capable of driving the bending frame to rotate, the bending frame is clamped on a to-be-bent plate of a to-be-bent product, the tooth shifting mechanism is used for shifting fins of the bending part of the to-be-bent product in the same direction, and the bending frames of the two sets of bending mechanisms synchronously and reversely rotate so that the to-be-bent product can be folded in a three-fold mode; the folding mechanism has the advantages that the two bending frames are synchronously and reversely rotated relative to the middle plate, so that three-fold folding of a three-fold product is realized.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchanger processing, in particular to a same-star bending machine and a bending method thereof. Background Art

[0002] The heat exchanger is composed of a header, flat tubes and fins. The header forms a frame. Several flat tubes are located in the frame to form a micro-pass plate. Several groups of fins are located between two groups of micro-pass plates, and several groups of fins are arranged in an array. The traditional fin bending process usually uses a single-station bending device. The bending process is as follows: first, the heat exchanger is loaded, then clamped by a clamping mechanism, and then the fins are pressed by a pre-bending mechanism so that the arranged connecting pieces are tilted in one direction as a whole. After pressing, the fins are pushed apart by a mechanism to prevent the two from overlapping, and finally bent by a bending mechanism.

[0003] It has the following technical defects:

[0004] Most existing bending machines adopt a single-side drive structure, which easily leads to stress concentration in the sheet during the bending process, causing deformation or breakage of the fins. Traditional equipment requires multiple positioning to complete multi-directional bending, resulting in low processing efficiency, and the cumulative error affects product consistency. For the same-direction bending requirements of multi-layer fins, existing equipment requires manual intervention to adjust the fin direction, which increases the complexity of the operation.

[0005] Existing patent documents (such as CN201920876543.2) disclose a double-station bending machine, and existing patent documents (such as CN202223313376.7) disclose a device for processing parallel flow heat exchangers, which cannot be applied to triple plate heat exchangers and cannot achieve synchronous reverse bending action. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a same-star bending machine and a bending method thereof.

[0007] The present invention solves the technical problem by adopting the following technical solutions:

[0008] A same-star bending machine comprises a frame, a gear-shifting mechanism and two sets of bending mechanisms located on the frame, the bending mechanism comprises a fixing part and a bending part, the fixing part is used to clamp the plate between two adjacent bending parts of the product to be folded, the bending part comprises a bending frame and a bending drive part capable of driving the bending frame to rotate, the bending frame is clamped on the plate to be bent of the product to be folded, the gear-shifting mechanism is used to shift the fins of the bending part of the product to be folded in the same direction, and the bending frames of the two sets of bending mechanisms rotate synchronously in opposite directions so that the product to be folded is folded in three and stacked.

[0009] Furthermore, the frame is also provided with a movable slide rail, and the bending mechanism can slide on the movable slide rail.

[0010] Furthermore, the movement directions of the two groups of bending mechanisms are both on a horizontal plane, and the movement direction of one group of the bending mechanisms is perpendicular to the movement direction of the other group of the bending mechanisms.

[0011] Furthermore, the gear-shifting mechanism includes a tooth plate and a power unit capable of driving the tooth plate to move, and a plurality of shifting teeth are distributed on the tooth plate, and each of the shifting teeth can rotate synchronously to change the angle between the shifting tooth and the tooth plate.

[0012] Furthermore, the tooth plate includes a first tooth plate and a second tooth plate, one end of the shifting tooth is rotatably connected to the second tooth plate, and the other end passes through the first tooth plate and faces the product to be folded, and the second tooth plate can move along the direction of arrangement of the shifting teeth.

[0013] Furthermore, the shifting tooth is rotatably connected to the first tooth plate.

[0014] Furthermore, the rotation points between two adjacent shifting teeth and the first tooth plate and / or the rotation points between two adjacent shifting teeth and the second tooth plate are staggered.

[0015] Furthermore, a clamping plate is provided on the bending frame, and a detachable floor pad is provided on the clamping surface of the clamping plate.

[0016] Furthermore, the bending frame is also provided with guide posts and a power source, and the power source drives the clamping plate to slide on the guide posts to adjust the position of the clamping plate clamped on the plate to be bent.

[0017] A bending method of a Tongxing bending machine, comprising:

[0018] The product to be bent is clamped in the step of placing the product to be bent on the two sets of bending mechanisms, and adjusting the positions of the bending mechanisms so that the fixing parts of the two sets of bending mechanisms are clamped on the plate between two adjacent bending parts of the product to be folded, and the bending parts of the two sets of bending mechanisms are clamped on the plate to be bent of the product to be folded;

[0019] The gear adaptability adjustment step is to rotate the gear according to the degree of pre-deformation of the fin to adjust the angle between the gear and the tooth plate;

[0020] Fin pre-deformation step: align each tooth of the toggle mechanism and insert it into the spacing between the fins, move the toggle mechanism to toggle the fins of the bending part of the product to be folded in the same direction, and remove the teeth after the toggle is completed;

[0021] In the step of bending the product to be bent, the bending frames of the two sets of the bending mechanisms are rotated synchronously in opposite directions so that the product to be folded is folded into three parts and stacked opposite to each other.

[0022] The advantages and positive effects of the present invention are:

[0023] The middle plate is fixed and clamped by the fixing parts, and then the bending frame of the bending part clamps the plate to be bent, and the two bending frames are synchronously rotated in opposite directions relative to the middle plate to achieve the three-fold stacking of the three-fold product. In addition, the teeth in the gear-shifting mechanism can move to change the angle between the teeth and the tooth plate to achieve the adjustment of the pre-deformation amount of the shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural diagram of the bending mechanism in the present invention;

[0025] Figure 2 It is a structural diagram of the toggle mechanism in the present invention;

[0026] Figure 3 It is an enlarged view of the shifting teeth in the present invention.

[0027] Additional markings: 1. Bending mechanism; 11. Fixing part; 12. Bending frame; 13. Bending drive unit; 14. Moving slide rail; 2. Gear shifting mechanism; 21. First tooth plate; 22. Second tooth plate; 23. Power unit; 24. Gear shifting; 3. Clamp; 4. Guide column. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0029] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0032] Since most existing bending machines use a single-side drive structure, stress concentration is likely to occur in the sheet during the bending process, causing deformation or breakage of the fins. Traditional equipment requires multiple positioning to complete multi-directional bending, resulting in low processing efficiency, and cumulative errors affect product consistency. For the same-direction bending requirements of multi-layer fins, existing equipment requires manual intervention to adjust the fin direction, increasing the complexity of the operation.

[0033] The existing patent documents (such as CN201920876543.2) disclose a double-station bending machine, and the existing patent documents (such as CN202223313376.7) disclose a device for processing parallel flow heat exchangers, which cannot be applied to triple plate heat exchangers and cannot achieve synchronous reverse bending action; therefore, the present invention designs such a same-star bending machine, such as Figure 1 As shown, the product to be folded is placed vertically on the bending machine, and the bending machine includes a frame, a shifting gear 24 mechanism 2 and two groups of bending mechanisms 1 located on the frame. The frame is also provided with a movable slide rail 14, and the bending mechanism 1 can slide on the movable slide rail 14. Specifically, the movement directions of the two groups of bending mechanisms 1 are both on the horizontal plane, and the movement direction of one group of bending mechanisms 1 is perpendicular to the movement direction of the other group of bending mechanisms 1. The bending mechanism 1 includes a fixing member 11 and a bending member. The fixing member 11 is used to clamp the plate between two adjacent bending parts of the product to be folded. The bending member includes a bending frame 12 and a bending driving part 13 that can drive the bending frame 12 to rotate. The bending frame 12 is clamped on the plate to be bent of the product to be folded. According to the size requirements of the product to be folded, it is assumed that the first group of bending mechanisms 1 is fixed in the first direction and the second group of bending mechanisms 1 is fixed in the first direction. The mechanism 1 moves in a first direction, and the first direction is the length direction of the product to be folded, that is, the direction in which the three-fold plates are arranged in parallel. The purpose of this is to adjust the position of the fixing member 11 clamping the middle plate, and to adjust the position of the bending frame 12 clamping the plate to be bent. Similarly, the first group of bending mechanisms 1 moves in the second direction, and the second group of bending mechanisms 1 is fixed in the second direction, also to adjust the clamping position; the shifting tooth 24 mechanism 2 is used to shift the fins of the bending part of the product to be folded in the same direction, and the bending frames 12 of the two groups of bending mechanisms 1 rotate synchronously in opposite directions to make the product to be folded in three folds and stacked. The advantage of the present invention is that the middle plate is fixed and clamped by the fixing member 11, and then the bending frame 12 of the bending member clamps the plate to be bent, and the two bending frames 12 are synchronously rotated in opposite directions relative to the middle plate to achieve three-fold stacking of the three-fold product.

[0034] In addition, the bending frame 12 is provided with a clamping plate 3 for clamping the product to be folded, and a removable floor pad is provided on the clamping surface of the clamping plate 3. The bending frame 12 is also provided with a guide column 4 and a power source. The power source drives the clamping plate 3 to slide on the guide column 4 to adjust the position of the clamping plate 3 clamped on the plate to be bent.

[0035] Since the teeth 24 in the existing tooth-pulling mechanism 2 are arranged in parallel on the tooth plate, and the angle between each tooth 24 and the tooth plate is 90 degrees, the pre-deformation of the fin is only controlled by the vertical movement of the tooth plate and the depth of the insertion of the tooth 24 between the two fins. Under the requirement of a certain pre-deformation, the fin to be pulled is easily broken by increasing the insertion depth and the moving distance of the tooth plate. Therefore, if Figure 2 As shown, the gear shifting mechanism 24 includes a tooth plate and a power unit 23 capable of driving the tooth plate to move. A number of gear shifting teeth 24 are evenly distributed on the tooth plate. Each gear shifting tooth 24 can rotate synchronously to change the angle between the gear shifting tooth 24 and the tooth plate. When the tooth plate needs to move upward to complete the shifting of the fins, the gear shifting tooth 24 is rotated and tilted upward in order to increase the pre-deformation of the shifting fins.

[0036] Furthermore, the tooth plate includes a first tooth plate 21 and a second tooth plate 22. The first tooth plate 21 is closer to the bending mechanism 1. One end of the shifting tooth 24 is rotatably connected to the second tooth plate 22, and the other end passes through the first tooth plate 21 and faces the product to be folded. The second tooth plate 22 can move along the arrangement direction of the shifting teeth 24. According to the spacing of the shifting teeth 24 passing through the first tooth plate 21, if the groove on the first tooth plate 21 is the same as the outer diameter of the shifting tooth 24, the movement of the second tooth plate 22 cannot drive the shifting tooth 24 to rotate. Therefore, the groove diameter on the first tooth plate 21 is larger than the outer diameter of the shifting tooth 24. This setting method causes the rotation degree of the shifting tooth 24 to be limited by the size of the groove on the first tooth plate 21.

[0037] In order to increase the rotation angle of the shifting tooth 24 , the shifting tooth 24 is rotatably connected to the first tooth plate 21 .

[0038] Furthermore, the rotation points of two adjacent shifting teeth 24 and the first tooth plate 21 or / and the rotation points of two adjacent shifting teeth 24 and the second tooth plate 22 are staggered to ensure that the rotation points do not restrict each other and increase the setting density of the shifting teeth 24 to meet the shifting requirements of high-density fins.

[0039] A bending method of a Tongxing bending machine, comprising:

[0040] The product to be bent is clamped in the step of placing the product to be bent on the two sets of bending mechanisms 1, and adjusting the positions of the bending mechanisms 1 so that the fixing members 11 of the two sets of bending mechanisms 1 are clamped on the plate between two adjacent bending parts of the product to be folded, and the bending members of the two sets of bending mechanisms 1 are clamped on the plate to be bent of the product to be folded;

[0041] The shifting tooth 24 adapts to the adjustment step, and the shifting tooth 24 is rotated according to the degree of pre-deformation of the fin to adjust the angle between the shifting tooth 24 and the tooth plate;

[0042] Fin pre-deformation step: align each tooth 24 of the toggle mechanism and insert it into the spacing between the fins, move the toggle mechanism to toggle the fins of the bending part of the product to be folded in the same direction, and remove the tooth 24 after the toggle is completed;

[0043] In the step of bending the product to be bent, the bending frames 12 of the two sets of bending mechanisms 1 are rotated synchronously in opposite directions so that the product to be folded is folded into three parts and stacked.

[0044] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and therefore the present invention is not limited to the embodiments described in the specific implementation manners. Any other implementation manners derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A Tongxing bending machine, characterized in that: The invention comprises a frame, a tooth-shifting (24) mechanism (2) located on the frame, and two sets of bending mechanisms (1); the bending mechanism (1) comprises a fixing part (11) and a bending part; the fixing part (11) is used to clamp a plate between two adjacent bending parts of a product to be folded; the bending part comprises a bending frame (12) and a bending driving part (13) capable of driving the bending frame (12) to rotate; the bending frame (12) is clamped on the plate to be bent of the product to be folded; the tooth-shifting (24) mechanism (2) is used to shift the fins of the bending part of the product to be folded in the same direction; the bending frames (12) of the two sets of bending mechanisms (1) rotate synchronously in opposite directions, so that the product to be folded is folded into three parts and stacked.

2. A same-star bending machine according to claim 1, characterized in that: The frame is also provided with a movable slide rail (14), and the bending mechanism (1) is capable of sliding on the movable slide rail (14).

3. According to claim 2, a same-star bending machine is characterized in that: The movement directions of the two groups of bending mechanisms (1) are both on a horizontal plane, and the movement direction of one group of the bending mechanisms (1) is perpendicular to the movement direction of the other group of the bending mechanisms (1).

4. A same-star bending machine according to claim 1 or 3, characterized in that: The shifting tooth (24) mechanism (2) comprises a tooth plate and a power unit (23) capable of driving the tooth plate to move, a plurality of shifting teeth (24) are evenly distributed on the tooth plate, and each of the shifting teeth (24) can rotate synchronously to change the angle between the shifting tooth (24) and the tooth plate.

5. A same-star bending machine according to claim 4, characterized in that: The tooth plate comprises a first tooth plate (21) and a second tooth plate (22); one end of the shifting tooth (24) is rotatably connected to the second tooth plate (22); the other end passes through the first tooth plate (21) and faces the product to be folded; the second tooth plate (22) can move along the direction in which the shifting teeth (24) are arranged.

6. A same-star bending machine according to claim 5, characterized in that: The shifting tooth (24) is rotationally connected to the first tooth plate (21).

7. A same-star bending machine according to claim 6, characterized in that The rotation points of two adjacent shifting teeth (24) and the first tooth plate (21) or / and the rotation points of two adjacent shifting teeth (24) and the second tooth plate (22) are staggered.

8. The same star bending machine according to claim 3, characterized in that: The bending frame (12) is provided with a clamping plate (3), and a detachable floor pad is provided on the clamping surface of the clamping plate (3).

9. The same star bending machine according to claim 7, characterized in that: The bending frame (12) is also provided with a guide column (4) and a power source, and the power source drives the clamping plate (3) to slide on the guide column (4) to adjust the position of the clamping plate (3) clamped on the plate to be bent.

10. A bending method for a Tongxing bending machine, providing the bending method for a Tongxing bending machine as claimed in claims 1-9, characterized in that: include: A product clamping step, wherein the product to be bent is placed on the two sets of bending mechanisms (1), and the positions of the bending mechanisms (1) are adjusted so that the fixing parts (11) of the two sets of bending mechanisms (1) are clamped on the plate between two adjacent bending parts of the product to be bent, and the bending parts of the two sets of bending mechanisms (1) are clamped on the plate to be bent of the product to be bent; The shifting tooth (24) is adapted to the adjustment step, and the shifting tooth (24) is rotated according to the degree of pre-deformation of the fin to adjust the angle between the shifting tooth (24) and the tooth plate; Fin pre-deformation step, aligning each shifting tooth (24) of the shifting mechanism and inserting it into the spacing between the fins, moving the shifting mechanism to shift the fins of the bending portion of the product to be folded in the same direction, and removing the shifting teeth (24) after the shifting is completed; In the step of bending the product to be bent, the bending frames (12) of the two sets of the bending mechanisms (1) are rotated synchronously in opposite directions so that the product to be folded is folded into three parts and stacked.

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