Wood board bending machine

Abstract

The utility model belongs to the technical field of board production, and particularly relates to a wood board bending machine which comprises a shaping mold and a bending mechanism. The peripheral surface of the shaping mold is the same as the shape of the wood needing to be bent; and the driving assembly is used for driving the placement plate to rotate to enable the wood plate to deform towards the peripheral surface of the shaping mold. The number of the placing plates is two, the placing plates are arranged below the shaping mold in a left-right mode, the placing plates are used for placing wood boards, positioning and clamping assemblies are arranged on the placing plates and used for fixing the wood boards to be bent, and anti-warping assemblies are further arranged on the placing plates and used for preventing the wood boards to be bent from warping at the moment when the wood boards to be bent are clamped by the positioning and clamping assemblies; by means of the anti-warping assembly, the situation that the middle portion of a soft and long wood plate protrudes upwards or the end portion of the soft and long wood plate warps at the moment when the soft and long wood plate is clamped by the positioning and clamping assembly, and the clamping, positioning and bending effects of the wood plate are affected can be prevented, and the bending efficiency and effect are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of board production, and particularly relates to a wooden board bending machine. Background Art

[0002] A wooden board bending device is equipment used for bending and shaping wooden boards. It constrains and extrudes the wooden boards through a mold, making the shape of the wooden boards into a predetermined shape to meet the usage requirements of the wooden boards. The use of the wooden board bending device replaces the manual bending method of wooden boards, greatly improving the efficiency of the wooden board bending operation and reducing the production cost of wooden board processing. In actual production, a solid wood bending machine such as the one with the patent number CN209851152U is usually used to bend woodworking boards.

[0003] However, when the current wood bending machine bends wooden boards, it first controls the bending cylinder to move the middle placement plate upward to clamp the workpiece through the controller, then controls the tightening cylinder to clamp the workpiece on both sides, and then controls the oil cylinder to make the left and right bending platforms reach the corresponding working angles. This clamping method is more applicable when bending short wooden boards and wooden boards with greater hardness. However, when the wooden board is long and soft, the sudden clamping of both ends of the wooden board will cause the middle of the wooden board to bulge upward or the end to slide upward and be misaligned with the tightening cylinder, resulting in warping and affecting the bending quality. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a wooden board bending machine for the above-mentioned existing technical problems, achieving the effect of improving the bending efficiency and quality.

[0005] In view of this, the utility model provides a wooden board bending machine, including:

[0006] A shaping mold, the outer peripheral surface of which is the same as the shape that the wood needs to be bent into;

[0007] A bending mechanism, the bending mechanism includes:

[0008] Placement plates, there are two placement plates, which are arranged left and right below the shaping mold, and the placement plates are used to place wooden boards. A positioning and clamping assembly is arranged on the placement plates for fixing the wooden boards to be bent. An anti-warping assembly is also arranged on the placement plates, and the anti-warping assembly is used to prevent the wooden boards to be bent from warping instantly when being clamped by the positioning and clamping assembly;

[0009] A driving assembly, the driving assembly is used to drive the placement plates to rotate so that the wooden boards are deformed towards the outer peripheral surface of the shaping mold.

[0010] In this technical solution, the anti-warping assembly can prevent the middle of the softer and longer wooden boards from bulging upward or the ends from warping instantly when being clamped by the positioning and clamping assembly, thereby affecting the clamping and positioning and bending effects of the wooden boards, and improving the bending efficiency and effect.

[0011] Further, the positioning and clamping assembly includes:

[0012] A positioning assembly, which includes a positioning seat and a positioning plate fixedly arranged on the positioning seat;

[0013] A pressing assembly, which includes a pressing seat and a pressing cylinder fixedly arranged on the pressing seat;

[0014] Among them, the positioning seat and the pressing seat are fixedly arranged on the placement plate and are respectively located on both sides of the shaping mold.

[0015] In this technical solution, by positioning on one side and pressing on the other side, the pressure on the wooden board caused by applying pressing forces on both sides can be reduced, and the middle bulge or end sliding and warping of the long and soft wooden board during the clamping process can be reduced.

[0016] Further, the anti-warping assembly includes:

[0017] A downward pressing cylinder, which is arranged above the placement plate, the piston rod of the downward pressing cylinder points vertically to the placement plate, and the downward pressing cylinder is fixedly arranged on the anti-warping seat;

[0018] A pushing and pulling cylinder, the piston rod of the pushing and pulling cylinder is fixedly connected to the anti-warping seat, the piston rod of the pushing and pulling cylinder is parallel to the length direction of the placement plate and perpendicular to the piston rod of the downward pressing cylinder.

[0019] In this technical solution, first place the wooden board to be bent above the placement plate, then make one end of the wooden board to be bent closely adhere to the positioning plate, then the driving assembly makes the placement plate move upward as a whole so that the middle part of the wooden board to be bent is in contact with the lowest part of the shaping mold, then start the pushing and pulling cylinder to push the anti-warping seat directly above the wooden board to be bent, then the downward pressing cylinder starts to press the wooden board to be bent on the placement plate, and finally the pressing cylinder starts to press the end of the wooden board to be bent. Such a clamping and fixing method is reliable and can relieve the problem of the middle bulge or end sliding and warping of the wooden board to be bent. After the pressing cylinder presses the end of the wooden board to be bent, the downward pressing cylinder lifts up, and the piston rod of the pushing and pulling cylinder retracts to pull back the anti-warping seat so that the pressing cylinder does not affect the bending of the wooden board.

[0020] Further, the positions of the positioning seat and the pressing seat on the placement plate can be adjusted by a position adjusting structure.

[0021] In this technical solution, the position adjusting structure enables this equipment to be applicable to bending plates of different lengths.

[0022] Further, the position adjusting structure includes bolts and nuts and further includes:

[0023] A first connection hole, which is opened on the side of the placement plate;

[0024] A second connection hole. Both the positioning seat and the pressing seat are in an inverted "U" shape. The positioning seat and the pressing seat are slidably arranged on the placement board and are provided with second connection holes that cooperate with the first connection hole. A bolt can pass through the first connection hole and the second connection hole and be threadedly connected to a nut.

[0025] Further, the push-pull cylinder is fixedly arranged on the pressing seat. There are two mutually parallel guiding convex strips arranged on the pressing seat. A sliding groove that cooperates with the guiding convex strips is arranged on the anti-warping seat. The anti-warping seat is slidably arranged on the pressing seat through the sliding groove and the guiding convex strips.

[0026] In this technical solution, this structure can enable the anti-warping component to perform synchronous position adjustment on the placement board following the pressing seat, reducing the machine adjustment time.

[0027] Further, soft pressing plates are connected to the end parts of the piston rods of the downward pressing cylinder and the pressing cylinder.

[0028] In this technical solution, the soft pressing plates can reduce the damage to the surface of the wooden board.

[0029] Further, a holding device is arranged on the bending machine corresponding to each wooden board to be bent. The holding device is used to keep the bent wooden board in a bent state.

[0030] Further, the holding device includes:

[0031] A holding soft iron sheet that can be bent. The holding soft iron sheet is arranged on the side of the wooden board away from the shaping die.

[0032] Extension blocks. There are two extension blocks in total, which are respectively fixedly connected to both ends of the holding soft iron sheet and are perpendicular to the holding soft iron sheet. Holding holes are arranged on the extension blocks.

[0033] A holding rod. An insertion part that can be inserted into the two holding holes respectively is arranged on the holding rod. After the holding soft iron sheet is bent in place, the distance between the two holding holes is equal to the distance between the two insertion parts. An anti-disengagement structure is arranged on the insertion part, and the anti-disengagement structure can prevent the insertion part from disengaging from the holding hole.

[0034] Further, the insertion part is a cylindrical pin. The diameter of the cylindrical pin is less than or equal to the diameter of the holding hole. The anti-disengagement structure includes a conical elastic part arranged along the outer circumference of the cylindrical pin. When in the natural state, the maximum diameter of the elastic part is greater than the diameter of the holding hole, and the minimum diameter is less than the diameter of the holding hole. The conical vertex of the elastic part is arranged at the insertion end head of the insertion part. When the elastic part is in a compressed state, the diameter is less than the diameter of the holding hole.

[0035] In the present technical solution, after the wooden board is bent and the soft iron sheet is bent into place synchronously, the retaining rod is moved closer to the extension block so that the insertion part is inserted into the retaining hole. During the insertion process, the elastic part is compressed by the retaining hole. When the elastic part passes through the retaining hole, the elastic part rebounds and resets, so that the diameter of the elastic part at the largest point is larger than the diameter of the retaining hole, thereby preventing the insertion part from escaping from the retaining hole. The bending state of the soft iron sheet can be kept fixed, that is, the bending state of the wooden board can be maintained to prevent rebound.

[0036] The beneficial effects of the utility model are:

[0037] 1. The anti-warping component can prevent the softer and longer wooden boards from bulging upward in the middle or warping at the ends when clamped by the positioning and clamping components, thereby affecting the clamping positioning and bending effects of the wooden boards, thereby improving the bending efficiency and effect.

[0038] 2. By positioning on one side and tightening on one side, the pressure on the board caused by the tightening force applied on both sides can be reduced, and the bulge in the middle or the sliding and warping of the ends of long and soft boards during the clamping process can be reduced.

[0039] 3. The anti-warping component can be adjusted synchronously with the tightening seat on the mounting plate to reduce the machine adjustment time.

[0040] 4. The holding device can keep the bent state of the board to prevent rebound. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a front view of a solution corresponding to the background technology;

[0042] Figure 2 It is a front view of the utility model;

[0043] Figure 3 It is a front view of another state of the utility model;

[0044] Figure 4 It is a three-dimensional picture of the anti-warping component;

[0045] Figure 5 is a perspective view of the holding device.

[0046] The symbols in the figure are:

[0047] 1. Wooden board to be bent; 2. Setting plate; 3. Clamping cylinder; 4. Forming mold; 5. Driving assembly; 6. Anti-warping assembly; 7. Positioning assembly; 8. Clamping assembly; 9. Positioning seat; 10. Positioning plate; 11. Clamping seat; 13. Pressing cylinder; 14. Push-pull cylinder; 15. Anti-warping seat; 16. First connecting hole; 17. Second connecting hole; 18. Guide rib; 19. Slide groove; 20. Soft pressing plate; 21. Retaining soft iron sheet; 22. Extension block; 23. Retaining rod; 24. Retaining hole; 25. Elastic part; 26. Insertion part. Detailed implementation manners

[0048] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0049] In the description of the present application, it should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0050] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0051] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0052] It should be noted that in this application, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described method may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0053] As Figure 1 shown, when the current wood bending machine bends a wooden board, first, the controller controls the bending cylinder to move the middle placement plate 2 upward to clamp the wooden board 1 to be bent, then controls the tightening cylinder 3 to clamp the workpiece on both sides, and then controls the oil cylinder to make the left and right bending platforms reach the corresponding working angles. This clamping method is more applicable when bending short wooden boards and wooden boards with greater hardness. However, when the wooden board is long and soft, the sudden clamping at both ends of the wooden board may cause the middle of the wooden board to bulge upward due to extrusion or the end to slide upward and misalign with the tightening cylinder 3, resulting in warping and affecting the bending quality.

[0054] Embodiment 1

[0055] As Figures 2 - 4 shown, there is provided a wooden board bending machine, including a shaping die 4 and a bending mechanism. The bending mechanism includes a driving assembly 5 and a placement plate 2. The driving assembly 5 is used to drive the placement plate 2 to rotate to deform the wooden board towards the outer peripheral surface of the shaping die 4.

[0056] The outer peripheral surface of the shaping die 4 is the same as the shape that the wood needs to be bent into; there are two placement plates 2, which are arranged left and right below the shaping die 4. The placement plate 2 is used to place the wooden board. A positioning and clamping assembly is provided on the placement plate 2 for fixing the wooden board 1 to be bent. An anti-warping assembly 6 is also provided on the placement plate 2. The anti-warping assembly 6 is used to prevent the wooden board 1 to be bent from warping instantly when being clamped by the positioning and clamping assembly.

[0057] The driving assembly 5 of the bending mechanism is disclosed in the patent CN209851152U and will not be elaborated in this patent. Through the anti-warping assembly 6, it is possible to prevent the middle of a soft and long wooden board from bulging upward or the end from warping instantly when being clamped by the positioning and clamping assembly, thus affecting the clamping and positioning of the wooden board and the bending effect, and improving the bending efficiency and effect.

[0058] Example Two

[0059] As Figures 2 - 4 shown, the positioning and clamping assembly includes a positioning assembly 7 and a pressing assembly 8. The positioning assembly 7 includes a positioning seat 9 and a positioning plate 10 fixedly arranged on the positioning seat 9; the pressing assembly 8 includes a pressing seat 11 and a pressing cylinder 3 fixedly arranged on the pressing seat 11; the positioning seat 9 and the pressing seat 11 are fixedly arranged on the placement plate 2 and are respectively located on both sides of the shaping die 4.

[0060] By positioning on one side and pressing on the other side, the pressure exerted on the wooden board by the pressing force on both sides can be reduced, and the middle bulge or end sliding and warping of the long and soft wooden board during the clamping process can be reduced.

[0061] Example Three

[0062] As Figures 2 - 4 shown, the anti-warping assembly 6 includes a downward pressing cylinder 13 and a pushing and pulling cylinder 14. The downward pressing cylinder 13 is arranged above the placement plate 2, the piston rod of the downward pressing cylinder 13 points vertically to the placement plate 2, and the downward pressing cylinder 13 is fixedly arranged on the anti-warping seat 15; the piston rod of the pushing and pulling cylinder 14 is fixedly connected to the anti-warping seat 15, and the piston rod of the pushing and pulling cylinder 14 is parallel to the length direction of the placement plate 2 and perpendicular to the piston rod of the downward pressing cylinder 13.

[0063] First, place the wooden board to be bent 1 above the placement plate 2, then make one end of the wooden board to be bent 1 closely adhere to the positioning plate 10, then the driving assembly 5 moves the placement plate 2 upward as a whole so that the middle of the wooden board to be bent 1 is in contact with the lowest part of the shaping die 4, then start the pushing and pulling cylinder 14 to push the anti-warping seat 15 directly above the wooden board to be bent 1, then start the downward pressing cylinder 13 to press the wooden board to be bent 1 on the placement plate 2, and finally start the pressing cylinder 3 to press the end of the wooden board to be bent 1. Such a clamping and fixing method is reliable and can alleviate the problem of the middle bulge or end sliding and warping of the wooden board to be bent 1. After the pressing cylinder 3 presses the end of the wooden board to be bent 1, the downward pressing cylinder 13 lifts up, and the piston rod of the pushing and pulling cylinder 14 retracts to pull back the anti-warping seat 15 so that the pressing cylinder 3 does not affect the bending of the wooden board.

[0064] Example Four

[0065] As Figures 2 - 4As shown, the positions of the positioning seat 9 and the pressing seat 11 on the placement plate 2 can be adjusted by a position adjustment structure. The position adjustment structure enables this device to be applicable to bending of plates with different lengths. The position adjustment structure includes bolts and nuts, and also includes a first connection hole 16 and a second connection hole 17. The first connection hole 16 is opened on the side of the placement plate 2; both the positioning seat 9 and the pressing seat 11 are in an "n" shape, the positioning seat 9 and the pressing seat 11 are slidably arranged on the placement plate 2 and are provided with second connection holes 17 that cooperate with the first connection hole 16, and the bolts can pass through the first connection hole 16 and the second connection hole 17 and be threadedly connected with the nuts.

[0066] The push-pull cylinder 14 is fixedly arranged on the pressing seat 11. There are two parallel guiding ridges 18 arranged on the pressing seat 11. A sliding groove 19 that cooperates with the guiding ridges 18 is opened on the anti-warping seat 15. The anti-warping seat 15 is slidably arranged on the pressing seat 11 through the sliding groove 19 and the guiding ridges 18. This structure can enable the anti-warping assembly 6 to synchronously adjust its position on the placement plate 2 following the pressing seat 11, reducing the machine adjustment time.

[0067] Soft pressing plates 20 are connected to the end parts of the piston rods of both the downward pressing cylinder 13 and the pressing cylinder 3. The soft pressing plates 20 can reduce the damage to the surface of the wooden board.

[0068] Embodiment Five

[0069] As Figure 5 shown, a holding device is provided corresponding to each wooden board 1 to be bent on the bending machine. The holding device is used to keep the bent wooden board in a bent state.

[0070] The holding device includes a holding soft iron sheet 21, an extension block 22, and a holding rod 23. The holding soft iron sheet 21 can be bent, and the holding soft iron sheet 21 is arranged on the side of the wooden board away from the shaping die 4; there are two extension blocks 22 in total, which are respectively fixedly connected to both ends of the holding soft iron sheet 21 and are perpendicular to the holding soft iron sheet 21. Holding holes 24 are opened on the extension blocks 22; an insertion part 26 that can be inserted into the two holding holes 24 respectively is arranged on the holding rod 23. After the holding soft iron sheet 21 is bent in place, the distance between the two holding holes 24 is equal to the distance between the two insertion parts 26. An anti-disengagement structure is arranged on the insertion part 26, and the anti-disengagement structure can prevent the insertion part 26 from disengaging from the holding hole 24.

[0071] The insertion part 26 is a cylindrical pin, and the diameter of the cylindrical pin is less than or equal to the diameter of the holding hole 24. The anti-disengagement structure includes a conical elastic part 25 arranged along the outer circumference of the cylindrical pin. When in the natural state, the maximum diameter of the elastic part 25 is greater than the diameter of the holding hole 24, and the minimum diameter is less than the diameter of the holding hole 24. The conical vertex of the elastic part 25 is arranged at the insertion end head of the insertion part 26. When the elastic part 25 is in a compressed state, its diameter is less than the diameter of the holding hole 24.

[0072] After the bending of the wooden board is completed and the soft iron sheet 21 is also bent in place synchronously, the holding rod 23 is moved closer to the extension block 22 so that the insertion portion 26 is inserted into the holding hole 24. During the insertion process, the elastic portion 25 is compressed by the holding hole 24. When the elastic portion 25 passes through the holding hole 24, the elastic portion 25 rebounds and resets, so that the diameter of the maximum part of the elastic portion 25 is larger than the diameter of the holding hole 24, forming a state that prevents the insertion portion 26 from being disengaged from the holding hole 24, which can keep the bent state of the soft iron sheet 21 fixed, that is, can keep the bent state of the wooden board and prevent it from rebounding.

[0073] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A wood board bending machine, characterized in that , including: A shaping mold (4), the outer peripheral surface of the shaping mold (4) being the same as the shape to which the wood needs to be bent; A bending mechanism, the bending mechanism including: A placement plate (2), there are two placement plates (2), arranged left and right below the shaping mold (4), and the placement plate (2) is used for placing the wooden board. A positioning and clamping assembly is provided on the placement plate (2) for fixing the wooden board to be bent (1). An anti-warping assembly (6) is also provided on the placement plate (2), and the anti-warping assembly (6) is used to prevent the wooden board to be bent (1) from warping when being clamped by the positioning and clamping assembly; A driving assembly (5), the driving assembly (5) being used to drive the placement plate (2) to rotate so that the wooden board deforms towards the outer peripheral surface of the shaping mold (4).

2. A wood board bending machine according to claim 1, characterized in that: The positioning and clamping assembly includes: A positioning assembly (7), the positioning assembly (7) including a positioning seat (9) and a positioning plate (10) fixedly arranged on the positioning seat (9); A pressing assembly (8), the pressing assembly (8) including a pressing seat (11) and a pressing cylinder (3) fixedly arranged on the pressing seat (11); Wherein, the positioning seat (9) and the pressing seat (11) are fixedly arranged on the placement plate (2) and are respectively located on both sides of the shaping mold (4).

3. A wood board bending machine according to claim 2, characterized in that: The anti-warping assembly (6) includes: A downward pressing cylinder (13), the downward pressing cylinder (13) being arranged above the placement plate (2), the piston rod of the downward pressing cylinder (13) vertically pointing to the placement plate (2), and the downward pressing cylinder (13) being fixedly arranged on the anti-warping seat (15); A pushing and pulling cylinder (14), the piston rod of the pushing and pulling cylinder (14) being fixedly connected to the anti-warping seat (15), the piston rod of the pushing and pulling cylinder (14) being parallel to the length direction of the placement plate (2) and perpendicular to the piston rod of the downward pressing cylinder (13).

4. A wood board bending machine according to claim 3, characterized in that: The positions of the positioning seat (9) and the pressing seat (11) on the placement plate (2) can be adjusted through a position adjusting structure.

5. A wood board bending machine according to claim 4, characterized in that: The position adjusting structure includes bolts and nuts and also includes: A first connection hole (16), the first connection hole (16) being opened on the side of the placement plate (2); A second connection hole (17), both the positioning seat (9) and the pressing seat (11) are in an "L" shape, the positioning seat (9) and the pressing seat (11) are slidably arranged on the placement plate (2) and are provided with second connection holes (17) for cooperating with the first connection hole (16), and the bolt can pass through the first connection hole (16) and the second connection hole (17) and be threadedly connected with the nut.

6. A wood board bending machine according to claim 5, characterized in that: The pushing and pulling cylinder (14) is fixedly arranged on the pressing seat (11), two mutually parallel guiding convex strips (18) are arranged on the pressing seat (11), a sliding groove (19) for cooperating with the guiding convex strips (18) is opened on the anti-warping seat (15), and the anti-warping seat (15) is slidably arranged on the pressing seat (11) through the sliding groove (19) and the guiding convex strips (18).

7. A wood board bending machine according to claim 6, characterized in that: Soft pressing plates (20) are connected to the ends of the piston rods of both the downward pressing cylinder (13) and the pressing cylinder (3).

8. A wood board bending machine according to claim 7, characterized in that: A holding device is provided on the bending machine corresponding to each wooden board to be bent (1), and the holding device is used to keep the bent wooden board in a bent state.

9. A wood board bending machine according to claim 8, characterized in that: The holding device includes: A retaining soft iron sheet (21), wherein the retaining soft iron sheet (21) is bendable and is arranged on a side of the wooden board away from the shaping mold (4); An extension block (22), wherein the extension block (22) has two pieces, which are respectively fixedly connected to the two ends of the holding soft iron sheet (21) and are perpendicular to the holding soft iron sheet (21), and a holding hole (24) is opened on the extension block (22); A retaining rod (23) is provided with an insertion portion (26) which can be respectively inserted into the two retaining holes (24). After the retaining soft iron sheet (21) is bent in place, the distance between the two retaining holes (24) is equal to the distance between the two insertion portions (26). The insertion portion (26) is provided with an anti-slip structure, which can prevent the insertion portion (26) from slipping out of the retaining hole (24).

10. A wood board bending machine according to claim 9, characterized in that: The insertion portion (26) is a cylindrical pin, the diameter of which is less than or equal to the diameter of the retaining hole (24); the anti-slip structure comprises a conical elastic portion (25) arranged along the outer circumference of the cylindrical pin; the diameter of the elastic portion (25) at its maximum point in a natural state is greater than the diameter of the retaining hole (24), and the diameter at its minimum point is less than the diameter of the retaining hole (24); the cone vertex of the elastic portion (25) is arranged at the insertion end of the insertion portion (26); and the diameter of the elastic portion (25) is less than the diameter of the retaining hole (24) when it is in a compressed state.

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