U-shaped bending device for primary lead aluminum pipe of mutual inductor

Abstract

The utility model relates to a mutual inductor primary wire aluminum pipe U-shaped bending device which comprises a lifting support, a top plate is arranged on the upper side of the lifting support, a main oil cylinder and two auxiliary oil cylinders which are arranged in a Y shape are arranged between the lifting support and the top plate, a primary forming pressing head is arranged at the front end of the main oil cylinder, and a secondary forming pressing head is arranged at the rear end of the secondary oil cylinder. A primary forming pressing wheel is arranged at the front end of the auxiliary oil cylinder, a first conveying roller is arranged on the upper side of the lifting support, a second conveying roller is arranged on the upper side of the top plate, when U-shaped bending is conducted on the aluminum pipe, the first conveying roller and a third conveying roller on the secondary forming mechanism are located at the same height, and when waist drum part bending is conducted on the aluminum pipe, the second conveying roller is located at the same height. The lifting support descends, and the second conveying roller and a third conveying roller on the secondary forming mechanism are located at the same height. The U-shaped bending device can be matched with a secondary forming mechanism for pressing the waist drum part of the aluminum pipe, so that U-shaped bending and waist drum-shaped bending of the aluminum pipe are completed at a time, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of mutual inductor production, in particular to a U-shaped bending device for a primary conductor aluminum tube of a mutual inductor. Background Art

[0002] The primary conductor aluminum tube of the current transformer needs to be bent into a waist drum shape to meet the production design requirements, but it is usually necessary to bend the primary conductor aluminum tube into a U shape first, and then bend it into a waist drum shape. The primary conductor aluminum tube bending equipment in the existing technology is mainly designed for the subsequent waist drum shape forming process. For example, the CN202933989U patent discloses a high-voltage transformer primary conductor aluminum tube forming equipment. When it works, it needs to place the pre-made U-shaped workpiece on the positioning roller and the limit block, and then perform the waist drum shape forming operation. The CN202316711U patent discloses a high-voltage transformer primary conductor aluminum tube waist forming equipment. When it works, the middle arc part of the U-shaped workpiece is fixed by the left clamp and the right clamp, and the upper mold and the lower mold are used to clamp the lower side of the U-shaped workpiece to complete the waist drum shape forming.

[0003] In the existing technology, bending the primary conductor aluminum tube into a U shape usually requires manual work, which is not only time-consuming and labor-intensive, but also has a relatively low production efficiency. Aluminum tube bending equipment in other fields is not designed for primary conductor aluminum tubes, and cannot be coordinated with the secondary forming mechanism for pressing the waist drum shape. Therefore, if the U-shaped bending and waist drum-shaped bending of the aluminum tube can be completed at the same time, it will undoubtedly improve production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a U-shaped bending device for the primary conductor aluminum tube of a mutual inductor, which can cooperate with a secondary forming mechanism for pressing the waist drum part of the aluminum tube, thereby realizing the U-shaped bending and waist drum bending of the aluminum tube at one time, thereby improving production efficiency.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A U-shaped bending device for the primary conductor aluminum tube of a mutual inductor comprises a lifting bracket, and a top plate is provided on the upper side of the lifting bracket, a main oil cylinder and two auxiliary oil cylinders arranged in a Y shape are provided between the lifting bracket and the top plate, wherein the front end of the main oil cylinder is provided with a primary forming pressure head, and the front end of the auxiliary oil cylinder is provided with a primary forming pressure wheel, a first transmission roller is provided on the upper side of the lifting bracket, and a second transmission roller is provided on the upper side of the top plate, when the aluminum tube is U-shaped bent, the first transmission roller and the third transmission roller on the secondary forming mechanism are at the same height, and when the waist drum part of the aluminum tube is bent, the lifting bracket is lowered and the second transmission roller and the third transmission roller on the secondary forming mechanism are at the same height.

[0007] A main oil cylinder hinge shaft is provided on one side between the lifting bracket and the top plate, and a secondary oil cylinder hinge shaft is provided on the other side. The rear end of the main oil cylinder is hinged to the main oil cylinder hinge shaft, and the rear end of the secondary oil cylinder is hinged to the corresponding secondary oil cylinder hinge shaft.

[0008] The lifting bracket is provided with a pressure head slide, the one-time forming pressure head is arranged on a pressure head slide, and a sliding block is provided on the lower side of the pressure head slide to cooperate with the pressure head slide.

[0009] A lifting mechanism is provided on the lower side of the lifting bracket, and the lifting bracket is driven to move up and down by the lifting mechanism.

[0010] The advantages and positive effects of this utility model are:

[0011] 1. The utility model can cooperate with the secondary forming mechanism for pressing the aluminum tube into a waist drum shape, thereby realizing the U-shaped bending and waist drum-shaped bending of the aluminum tube at one time, thereby improving production efficiency.

[0012] 2. The utility model is provided with a first transmission roller on the lifting bracket, and a second transmission roller is provided on the top plate on the upper side of the lifting bracket. When the aluminum tube is U-shaped bent, the utility model is at the same height as the secondary molding mechanism, and the bent U-shaped aluminum tube can be transferred along the first transmission roller and the third transmission roller on the secondary molding mechanism. When the waist drum part of the aluminum tube is bent, the lifting bracket is lowered. At this time, the aluminum tube can move in opposite directions along the third transmission roller and the second transmission roller to achieve tension. Therefore, the utility model solves the problem of movement conversion of different processes of the aluminum tube by only using the arrangement of the first transmission roller and the second transmission roller. The structure is simple and the conversion is reliable.

[0013] 3. The utility model has a compact structure and can be closely matched with the secondary molding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a top view of the utility model.

[0015] Figure 2 This is the main view of the utility model.

[0016] Figure 3 This is a schematic diagram of the use of the utility model Figure 1 ,

[0017] Figure 4 This is a schematic diagram of the use of the utility model Figure 2 ,

[0018] Figure 5 This is a schematic diagram of the use of the utility model Figure 3 ,

[0019] Figure 6This is a schematic diagram of the shape of the primary conductor aluminum tube targeted by the present utility model.

[0020] Figure 7 for Figure 3 Schematic diagram of baffle installation.

[0021] Among them, 1 is the lifting bracket, 101 is the first transmission roller, 2 is the top plate, 201 is the second transmission roller, 3 is the main oil cylinder, 301 is the main oil cylinder hinge shaft, 4 is the primary forming pressure head, 401 is the pressure head slide, 5 is the auxiliary oil cylinder, 501 is the auxiliary oil cylinder hinge shaft, 6 is the primary forming pressure wheel, 7 is the lifting mechanism, 701 is the lifting scissor rod, 702 is the lifting oil cylinder, 8 is the secondary forming mechanism, 801 is the third transmission roller, 802 is the baffle, and 9 is the aluminum tube waist drum part. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 7 As shown, the utility model includes a lifting bracket 1, and a top plate 2 is provided on the upper side of the lifting bracket 1, and a main oil cylinder 3 and two auxiliary oil cylinders 5 arranged in a Y shape are provided between the lifting bracket 1 and the top plate 2, wherein the front end of the main oil cylinder 3 is provided with a one-time forming pressure head 4, an angle α is formed between the auxiliary oil cylinder 5 and the main oil cylinder 3, and a one-time forming pressure wheel 6 is provided at the front end of the auxiliary oil cylinder 5, a first transmission roller 101 is provided on the upper side of the lifting bracket 1, and a second transmission roller 201 is provided on the upper side of the top plate 2.

[0024] like Figures 1-2 As shown, in this embodiment, a main cylinder hinge shaft 301 is provided on one side between the lifting bracket 1 and the top plate 2, and a secondary cylinder hinge shaft 501 is provided on the other side. The rear end of the main cylinder 3 is hinged to the main cylinder hinge shaft 301, and the rear end of the secondary cylinder 5 is hinged to the corresponding secondary cylinder hinge shaft 501.

[0025] like Figures 1-2 As shown, in this embodiment, a pressure head slot 401 is provided on the lifting bracket 1, the one-time forming pressure head 4 is provided on a pressure head slide, and a slider is provided on the lower side of the pressure head slide to cooperate with the pressure head slot 401 to ensure that the one-time forming pressure head 4 moves smoothly and the moving direction does not deviate.

[0026] like Figure 2 As shown, in this embodiment, a lifting mechanism 7 is provided on the lower side of the lifting bracket 1, and the lifting bracket 1 is driven to rise and fall by the lifting mechanism 7. In this embodiment, the lifting mechanism 7 is a lifting scissors mechanism, which includes two cross-arranged lifting scissors rods 701, and one of the lifting scissors rods 701 is driven to swing by a lifting cylinder 702. The lifting scissors mechanism is a well-known technology in the field.

[0027] The working principle of this utility model is:

[0028] The present invention can complete the U-shaped bending operation of the aluminum tube, and can cooperate with the secondary forming mechanism 8 for pressing the aluminum tube into a waist drum shape, wherein the secondary forming mechanism 8 is provided with a third transmission roller 801 for supporting the movement of the aluminum tube, which is a well-known technology in the art.

[0029] When the utility model works, Figure 4 As shown, the present invention and the secondary molding mechanism 8 are at the same height first. At this time, the first transmission roller 101 of the present invention and the third transmission roller 801 on the secondary molding mechanism 8 are at the same height. The aluminum tube to be processed is inserted into place between the primary molding pressure head 4 and the primary molding pressure wheel 6 of the present invention. Then the main oil cylinder 3 is started to drive the primary molding pressure head 4 to move forward, and the auxiliary oil cylinder 5 drives the primary molding pressure wheel 6 to move forward. The straight aluminum tube is bent into a U shape under the action of the primary molding pressure head 4 and the primary molding pressure wheel 6. Then the primary molding pressure head 4 and the primary molding pressure wheel 6 return to their original positions. The U-shaped aluminum tube can be moved along the first transmission roller 101 and the third transmission roller 801 to the secondary molding mechanism 8. When the aluminum tube leaves the present invention, the lifting bracket 1 is lowered to Figure 5 As shown in the figure, the second transfer roller 201 of the present invention is at the same height as the third transfer roller 801 on the secondary molding mechanism 8, and then the U-shaped aluminum tube moves in the opposite direction along the third transfer roller 801 and the second transfer roller 201 and is tightened. Finally, the secondary molding mechanism 8 is started to squeeze the rear end of the aluminum tube into the shape shown in the figure. Figure 6 The aluminum tube waist drum portion 9 shown.

[0030] In addition, the secondary molding mechanism 8 is provided with a reversible baffle 802 on the side away from the present invention. When the U-shaped aluminum tube moves onto the secondary molding mechanism 8, the baffle 802 can be flipped down so as not to affect the movement of the aluminum tube. When the U-shaped aluminum tube returns to the present invention and is tightened, the baffle 802 stands up, and the arc-shaped part in the middle of the aluminum tube is blocked and limited by the baffle 802. Figure 7 As shown, the lower end of the baffle 802 is hinged to the baffle seat 8021 through the baffle hinge shaft 8023, and the lower end of the baffle 802 is provided with a positioning pin 8022 which is inserted into the positioning pin hole on the baffle seat 8021. After the positioning pin 8022 is pulled out, the baffle 802 can be laid flat. When the baffle 802 is erected, the positioning pin 8022 can be reinserted to keep the baffle 802 upright.

[0031] The secondary molding mechanism 8 uses multiple pressing wheels to complete the press molding of the aluminum tube waist drum part 9. This is a well-known technology in the art. For example, the pressing wheel combination structure in patents such as CN202933989U and CN202893916U can be used.

Claims

1. A U-shaped bending device for the primary conductor aluminum tube of a mutual inductor, characterized by: The invention comprises a lifting bracket (1), wherein a top plate (2) is provided on the upper side of the lifting bracket (1), a main oil cylinder (3) and two auxiliary oil cylinders (5) arranged in a Y shape are provided between the lifting bracket (1) and the top plate (2), wherein a primary forming pressure head (4) is provided at the front end of the main oil cylinder (3), and a primary forming pressure wheel (6) is provided at the front end of the auxiliary oil cylinder (5), a first transmission roller (101) is provided on the upper side of the lifting bracket (1), and a second transmission roller (201) is provided on the upper side of the top plate (2), when the aluminum tube is U-shaped bent, the first transmission roller (101) and the third transmission roller (801) on the secondary forming mechanism (8) are at the same height, and when the aluminum tube waist drum portion is bent, the lifting bracket (1) descends and the second transmission roller (201) and the third transmission roller (801) on the secondary forming mechanism (8) are at the same height.

2. The U-shaped bending device for the primary conductor aluminum tube of a mutual inductor according to claim 1, characterized in that: A main oil cylinder hinge shaft (301) is provided on one side between the lifting bracket (1) and the top plate (2), and an auxiliary oil cylinder hinge shaft (501) is provided on the other side. The rear end of the main oil cylinder (3) is hinged to the main oil cylinder hinge shaft (301), and the rear end of the auxiliary oil cylinder (5) is hinged to the corresponding auxiliary oil cylinder hinge shaft (501).

3. The U-shaped bending device for the primary conductor aluminum tube of a mutual inductor according to claim 1, characterized in that: The lifting bracket (1) is provided with a press head slide (401), the one-time forming press head (4) is arranged on a press head slide seat, and a slider is provided on the lower side of the press head slide seat to cooperate with the press head slide slot (401).

4. The U-shaped bending device for the primary conductor aluminum tube of a mutual inductor according to claim 1, characterized in that: A lifting mechanism (7) is provided on the lower side of the lifting bracket (1), and the lifting bracket (1) is driven to rise and fall by the lifting mechanism (7).

Images