Purlin forming machine

Abstract

The application discloses a purlin forming machine, which comprises a workbench and a top frame, a first forming mechanism is arranged above the workbench, and a second forming mechanism is arranged on the inner side of the first forming mechanism; the first forming mechanism comprises a pair of bending upper dies which are arranged to slide below the top frame, two corresponding bending lower dies are arranged on the workbench, and a first cylinder for driving the bending upper dies is vertically arranged on the inner top wall of the top frame; a pair of inner bending dies are arranged on the inner side of the two bending upper dies, and outer bending dies corresponding to the inner bending dies are arranged on the inner side of the bending lower dies. The application has the advantages of reasonable design, novel structure, one-time forming of C-shaped purlins, convenient forming of the flanges of the C-shaped purlins through the horizontally movable inner bending dies, improved processing efficiency of the C-shaped purlins, reduced processing cost, satisfied forming requirements of different models of C-shaped purlins, and improved processing capacity of the purlin forming machine.

Description

Technical Field

[0001] This invention relates to the field of purlin processing equipment technology, and more particularly to a purlin forming machine. Background Technology

[0002] Purlins, also known as purlin trusses, are horizontal roof beams perpendicular to the roof trusses or rafters, used to support the rafters or roofing materials. Steel purlins come in various cross-sectional shapes, including C-shaped, L-shaped, U-shaped, and composite purlins. Currently, most steel purlins are made from thin-walled steel plates using purlin forming machines.

[0003] Existing C-type purlin forming processes mostly involve multiple bending and forming, which require transfer between bending and forming stages. This process is inconvenient, inefficient, and costly. Furthermore, the multiple processing steps increase processing errors, affecting forming quality and resulting in mediocre processing effects that cannot meet the needs of purlin processing. Summary of the Invention

[0004] The purpose of this invention is to solve the shortcomings of existing technologies, such as the need for transfer between multiple bending and forming processes, which makes processing inconvenient, inefficient, and costly. Furthermore, multiple processing steps can increase processing errors, affect forming quality, and result in mediocre processing effects, failing to meet the requirements of purlin processing. Therefore, this invention proposes a purlin forming machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A purlin forming machine includes a worktable and a top frame, wherein a first forming mechanism is provided above the worktable and a second forming mechanism is provided inside the first forming mechanism;

[0007] The first forming mechanism includes a pair of upper bending dies slidably disposed below the top frame, two corresponding lower bending dies disposed on the worktable, and a first cylinder for driving the upper bending dies is also vertically disposed on the inner top wall of the top frame.

[0008] The two upper bending dies are provided with a pair of inner bending dies on their inner sides, and the lower bending die is provided with an outer bending die corresponding to the inner bending dies on its inner side. Each inner bending die is provided with a corresponding mounting rod above it. Multiple mounting plates are connected between the mounting rod and the inner bending die, and the mounting rods on both sides are staggered. Multiple sliding seats are provided above each mounting rod. The sliding seats are slidably connected to the mounting seats. Multiple second cylinders are connected between the mounting seats and the inner top wall of the top frame. Each sliding seat is provided with a return spring on its inner side.

[0009] Both ends of the two mounting rods are provided with guide blocks, and both sides of the worktable are provided with guide plates that match the guide blocks. The inner side of each guide plate is provided with a guide groove corresponding to the guide block.

[0010] Preferably, multiple sliding rods are horizontally installed on the adjacent sides of the two mounting rods. Each sliding rod passes through the mounting rod on the other side and is provided with a limiting plate. A tension spring is connected between the limiting plate and the corresponding mounting rod.

[0011] Preferably, a fixing plate is vertically slidably provided above the mounting base, and the fixing plate is horizontally installed on the telescopic end of the first cylinder. Multiple connecting rods are connected between the two sides of the first cylinder and the two bending upper dies, respectively.

[0012] More preferably, the mounting base has multiple sliding grooves on both sides corresponding to the connecting rods, and the connecting rods are slidably installed in the sliding grooves.

[0013] Preferably, both ends of the two bending lower dies are provided with fixed seats, each fixed seat is provided with a stud, and the stud is slidably connected to the bending lower die. Each stud is threaded with a plurality of locking nuts corresponding to the bending lower die.

[0014] More preferably, both of the fixing seats are provided with a stop block corresponding to the profile.

[0015] Preferably, the two outer bending dies are provided with a die base at their lower ends. Each outer bending die is provided with multiple positioning holes corresponding to the die base. Multiple extension ends of lifting cylinders are connected to the lower part of the die base. The lifting cylinders are all vertically installed on the inner bottom wall of the worktable.

[0016] Preferably, a material ejector plate is slidably provided between the two outer bending dies, and a plurality of material ejector springs are connected between the lower end of the material ejector plate and the die base.

[0017] Preferably, the worktable is provided with multiple limiting blocks on its rear side, each limiting block having an adjustment groove and a corresponding adjusting nut on each adjustment groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, the purlin can be formed in one step by using two forming stages of a forming machine, which greatly improves the processing efficiency of the forming machine and eliminates the need for transfer between the two forming stages, thus saving processing costs.

[0020] 2. In this invention, the trajectory of the guide block is controlled by the guide groove, so that the inner bending die separates when it descends and closes when it rises, ensuring the quality of the C-shaped purlin flange forming and facilitating the removal of the inner bending die from the C-shaped purlin after forming.

[0021] 3. In this invention, the outer bending die is lifted by a lifting cylinder, which on the one hand ejects the profile that has completed the first forming stage, and on the other hand facilitates the forming of the second stage, avoids interference of the first forming mechanism with the second forming stage, and ensures the forming effect.

[0022] 4. In this invention, the lower bending die and the outer bending die can be easily adjusted to ensure the forming capability for different types of C-shaped purlins and improve the applicability of the forming machine.

[0023] This invention features a reasonable design and novel structure, enabling one-time forming of C-shaped purlins. Furthermore, the horizontally movable inner bending die facilitates the forming of C-shaped purlin flanges, improving processing efficiency and reducing costs. It also meets the forming requirements of different C-shaped purlin models, enhancing the processing capacity of the purlin forming machine. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the first molding mechanism of the present invention;

[0027] Figure 4 This is a schematic diagram of the second molding mechanism of the present invention;

[0028] Figure 5 This is a schematic diagram of the workbench structure of the present invention;

[0029] Figure 6 This is a cross-sectional structural diagram of the present invention;

[0030] Figure 7 This is a schematic diagram of the guide plate structure of the present invention.

[0031] In the diagram: 1. Workbench; 2. Top frame; 3. First forming mechanism; 3. Fixed plate; 31. First cylinder; 32. Connecting rod; 33. Upper bending die; 34. Lower bending die; 35. Fixed seat; 36. Stud; 37. Locking nut; 371. Second forming mechanism; 4. Mounting seat; 41. Slide groove; 411. Second cylinder; 42. Mounting rod; 43. Sliding seat; 431. Return spring; 432. Guide block; 433. Mounting plate; 44. Slide rod; 441. Limiting plate; 442. Tension spring; 443. Inner bending die; 45. Outer bending die; 46. Positioning hole; 461. Unloading plate; 462. Unloading spring; 463. Lifting cylinder; 47. Guide plate; 5. Guide groove; 51. Stop block; 6. Limiting block; 7. Adjusting groove; 71. Adjusting nut; 72. Profile a. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Example 1

[0035] Reference Figure 1-7 A purlin forming machine includes a worktable 1 and a top frame 2. A first forming mechanism 3 is provided above the worktable 1. The first forming mechanism 3 is used to form the rolled edge of a C-shaped purlin. A second forming mechanism 4 is provided inside the first forming mechanism 3. The second forming mechanism 4 is used to form the flange of the C-shaped purlin. The C-shaped purlin is formed in one step through the cooperation of the first forming mechanism 3 and the second forming mechanism 4.

[0036] The first forming mechanism 3 includes a pair of upper bending dies 34 slidably disposed below the top frame 2, and two corresponding lower bending dies 35 disposed on the worktable 1. A first cylinder 32 for driving the upper bending dies 34 is also vertically disposed on the inner top wall of the top frame 2. The upper bending dies 34 are driven to move up and down reciprocally by the first cylinder 32, and the lower bending dies 35 are used to bend and form the edge of the C-shaped purlin.

[0037] The inner sides of the two upper bending dies 34 are provided with a pair of inner bending dies 45, and the inner sides of the lower bending die 35 are provided with outer bending dies 46 corresponding to the inner bending dies 45. Each inner bending die 45 is provided with a corresponding mounting rod 43. Multiple mounting plates 44 are connected between the mounting rod 43 and the inner bending die 45, and the mounting plates 44 on both sides are staggered. Multiple sliding seats 431 are provided above each mounting rod 43. The sliding seats 431 are slidably connected to the mounting seats 41. The mounting seats 41 are connected to the inner top wall of the top frame 2. There are multiple second cylinders 42. Each sliding seat 431 is equipped with a return spring 432 on its inner side. Through the staggered mounting plates 44 on both sides, the two inner bending dies 45 can be brought close to each other. When the inner bending dies 45 descend, the two inner bending dies 45 move away from each other, corresponding to the height of the C-shaped purlin. They cooperate with the outer bending die 46 to form the flange of the C-shaped purlin. After the forming is completed, the inner bending dies 45 are brought close to each other, making it easy to pull them upward from the formed C-shaped purlin, thus completing the forming of the C-shaped purlin.

[0038] Both ends of the two mounting rods 43 are provided with guide blocks 433. Both sides of the worktable 1 are provided with guide plates 5 that match the guide blocks 433. The inner side of the guide plates 5 is provided with guide grooves 51 that correspond to the guide blocks 433. The guide blocks 433 are guided by the guide grooves 51, thereby controlling the approach and distance of the two inner bending dies 45.

[0039] When using this forming machine, the profile a is placed on the worktable 1. First, the first cylinder 32 drives the upper bending die 34 to descend, and the lower bending die 35 completes the forming of the C-shaped purlin edge. After the edge is formed, the first cylinder 32 retracts and the second cylinder 42 extends, cooperating with the inner bending die 45 and the outer bending die 46 to form the flange of the C-shaped purlin. After the forming is completed, the guide groove 51 controls the trajectory of the guide block 433, so that the two inner bending dies 45 are close to each other when rising, which facilitates the inner bending die 45 to be pulled out of the C-shaped purlin to complete the forming of the C-shaped purlin. Through two forming stages, the forming of the C-shaped purlin is completed using only one forming machine, which effectively improves the forming efficiency of the C-shaped purlin, avoids the transfer between the two forming stages, and greatly saves processing costs.

[0040] In this embodiment, as Figure 2-6 As shown, multiple sliding rods 441 are horizontally installed on the adjacent side of the two mounting rods 43. Each sliding rod 441 passes through the mounting rod 43 on the other side and is provided with a limiting plate 442. A tension spring 443 is connected between the limiting plate 442 and the corresponding mounting rod 43. The sliding rods 441 improve the stability of the horizontal sliding of the two inner bending dies 45, and the limiting plate 442 limits the movement. The tension spring 443, together with the sliding rods 441, ensures the reset effect of the inner bending dies 45.

[0041] Example 2

[0042] Reference Figure 2-6 In this embodiment, it is basically the same as in embodiment one, but with an optimization: a fixing plate 31 is vertically slidably provided above the mounting base 41, and the fixing plate 31 is horizontally installed on the telescopic end of the first cylinder 32. Multiple connecting rods 33 are connected between the two sides of the first cylinder 32 and the two bending upper dies 34, respectively. The fixing plate 31 and the connecting rods 33 on both sides ensure the synchronous movement of the two bending upper dies 34 and ensure the bending effect.

[0043] In this embodiment, as Figure 2-6 As shown, the mounting base 41 has multiple sliding grooves 411 on both sides corresponding to the connecting rods 33. The connecting rods 33 are all slidably installed in the sliding grooves 411, which improves the stability of the two bending upper dies 34 sliding up and down, and ensures the compactness of the first forming mechanism 3 and the second forming mechanism 4, thus ensuring the forming quality and working stability of the forming device.

[0044] Example 3

[0045] Reference Figure 2-6 In this embodiment, it is basically the same as in Embodiment 1, but with an optimization: both ends of the two bending lower dies 35 are provided with fixing seats 36, and each fixing seat 36 is provided with a stud 37, and the stud 37 is slidably connected to the bending lower die 35. Each stud 37 is threaded with a plurality of locking nuts 371 corresponding to the bending lower die 35. The bending lower die 35 is installed through the fixing seats 36, and the sliding adjustment of the bending lower die 35 is facilitated by the stud 37, and the locking nuts 371 are used to ensure the fixing effect of the bending lower die 35.

[0046] In this embodiment, as Figure 2-6 As shown, both of the fixed seats 36 are provided with a stop block 6 corresponding to the profile a, which facilitates the positioning of the profile a when it is placed.

[0047] In this embodiment, as Figure 2-6 As shown, the two outer bending dies 46 are provided with die bases at their lower ends. Each outer bending die 46 is provided with multiple positioning holes 461 corresponding to the die bases. Multiple extension ends of lifting cylinders 47 are connected to the lower part of the die bases. The lifting cylinders 47 are all vertically installed on the inner bottom wall of the worktable 1. The positioning holes 461 facilitate the adjustment and installation of the outer bending dies 46, ensuring the forming effect of different types of C-shaped purlins. After the edge forming is completed, the die base is lifted by the lifting cylinders 47 provided below the die bases to push out the profile a in the first forming stage, which facilitates the forming of the first stage and the second forming stage. After the profile a is pushed out, the inner bending die 45 is lowered to cooperate with the outer bending die 46 for forming, ensuring the forming effect of the C-shaped purlins.

[0048] In this embodiment, as Figure 2-6 As shown, a material ejector plate 462 is slidably provided between the two outer bending dies 46. Multiple material ejector springs 463 are connected between the lower end of the material ejector plate 462 and the die base. The material ejector plate 462 and the material ejector springs 463 work together to ensure the ejection of the C-shaped purlin after molding, thus ensuring the performance of the molding machine.

[0049] Example 4

[0050] Reference Figure 5 and 6 In this embodiment, it is basically the same as in embodiment one, but is further optimized in that multiple limiting blocks 7 are slidably provided on the rear side of the workbench 1, and each limiting block 7 is provided with an adjustment groove 71. Each adjustment groove 71 is provided with a corresponding adjustment nut 72. The limiting blocks 7 are adjusted to adapt to the placement and positioning of different types of profiles a, so as to ensure the forming effect of different types of C-shaped purlins.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A purlin forming machine, comprising a worktable (1) and a top frame (2), characterized in that, The workbench (1) is provided with a first forming mechanism (3) above it, and a second forming mechanism (4) is provided inside the first forming mechanism (3). The first forming mechanism (3) includes a pair of bending upper dies (34) slidably disposed below the top frame (2), and two corresponding bending lower dies (35) are provided on the worktable (1). A first cylinder (32) for driving the bending upper dies (34) is also vertically disposed on the inner top wall of the top frame (2). The two upper bending dies (34) are provided with a pair of inner bending dies (45) on their inner sides, and the lower bending die (35) is provided with an outer bending die (46) corresponding to the inner bending die (45) on its inner side. Each inner bending die (45) is provided with a corresponding mounting rod (43) above it. Multiple mounting plates (44) are connected between the mounting rod (43) and the inner bending die (45), and the mounting plates (44) on both sides are staggered. Multiple sliding seats (431) are provided above each mounting rod (43), and the sliding seats (431) slide. A mounting base (41) is connected to the top wall of the top frame (2), and multiple second cylinders (42) are connected between the mounting base (41) and the inner top wall of the top frame (2). Each sliding seat (431) is provided with a return spring (432) on the inner side. Multiple sliding rods (441) are horizontally installed on the adjacent side of the two mounting rods (43). Each sliding rod (441) passes through the mounting rod (43) on the other side and is provided with a limiting plate (442). A tension spring (443) is connected between the limiting plate (442) and the corresponding mounting rod (43). Both ends of the two mounting rods (43) are provided with guide blocks (433), and both sides of the workbench (1) are provided with guide plates (5) that match the guide blocks (433). The inner side of the guide plates (5) is provided with guide grooves (51) that correspond to the guide blocks (433). The two external bending dies (46) are provided with a die base at the lower end. The external bending dies (46) are provided with multiple positioning holes (461) corresponding to the die base. The extension ends of multiple lifting cylinders (47) are connected to the bottom of the die base. The lifting cylinders (47) are all vertically installed on the bottom wall of the workbench (1).

2. The purlin forming machine according to claim 1, characterized in that, A fixing plate (31) is vertically slidably provided above the mounting base (41). The fixing plate (31) is horizontally installed on the telescopic end of the first cylinder (32). Multiple connecting rods (33) are connected between the two sides of the first cylinder (32) and the two bending upper dies (34).

3. A purlin forming machine according to claim 2, characterized in that, The mounting base (41) has multiple grooves (411) on both sides corresponding to the connecting rod (33), and the connecting rod (33) is slidably installed in the groove (411).

4. A purlin forming machine according to claim 1, characterized in that, The two bending lower dies (35) are provided with fixed seats (36) at both ends. Each fixed seat (36) is provided with a stud (37), and the stud (37) is slidably connected to the bending lower die (35). Each stud (37) is threaded with multiple locking nuts (371) corresponding to the bending lower die (35).

5. A purlin forming machine according to claim 4, characterized in that, Both of the aforementioned fixing seats (36) are provided with a stop (6) corresponding to the profile.

6. A purlin forming machine according to claim 1, characterized in that, A material ejector plate (462) is slidably provided between the two external bending dies (46), and a plurality of material ejector springs (463) are connected between the lower end of the material ejector plate (462) and the die base.

7. A purlin forming machine according to claim 1, characterized in that, The workbench (1) is provided with multiple limit blocks (7) on its rear side. Each limit block (7) is provided with an adjustment groove (71) and a corresponding adjustment nut (72) is provided on each adjustment groove (71).

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