Flaring and pipe shrinking die

Abstract

The utility model belongs to the technical field of pipe machining, and particularly relates to a flaring and pipe shrinking die which comprises a workbench, a flaring and pipe shrinking mechanism is arranged at the top end of the workbench, a support is fixedly connected to the top end of the workbench, a fixing mechanism is fixedly connected to the inner surface of the support, and the fixing mechanism comprises four hydraulic rods distributed in a rectangular array. Four hydraulic rods are fixedly connected to the top end of the workbench, a lifting plate is jointly and fixedly connected to the bottom ends of the four hydraulic rods, two upper clamping plates are slidably connected to the bottom end of the lifting plate, and two lower clamping plates are slidably connected to the top end of the workbench. Under the action of the sliding grooves and the sliding strips, the device can complete adaptive adjustment within a very short time, the pipe fittings can be quickly and stably fixed, the equipment debugging time caused by the length difference of the pipe fittings is shortened, and the working efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe processing, and particularly relates to an expanding and reducing pipe die. BACKGROUND

[0002] In the field of pipe processing, pipe forming and secondary processing are common operations. Pipes are widely used in many industries such as automobile manufacturing, aerospace, furniture, and construction. For example, in the fuel system and air conditioning system of an automobile, various shapes and specifications of pipes are required. These pipes not only need to meet certain pipe diameter requirements, but also need to be treated at the pipe opening part, such as expanding or reducing, to facilitate connection with other components or meet fluid transmission requirements.

[0003] At the same time, the patent specification with the application number CN106424395B discloses a pipe expanding and reducing processing die, which comprises a material taking mechanism, a reducing die, an expanding die cover plate, an expanding die, a pull rod, a die seat and a core seat. The material taking mechanism comprises a material taking lifting seat, a cylinder, a first core and a first inner core. The first inner core is provided with an inner core cover plate and an inner core bottom plate outside. The reducing die is provided with a taper sleeve and a reducing die cover plate outside. The reducing die is provided with a pipe outer guard plate inside. The second inner core is provided with a second core inside. The expanding die is provided with a plurality of expanding die springs and plugs between the expanding die and the stop ring. The expanding die is provided with a third core inside. The pull rod is provided with an inner core spring outside. The first inner core, the reducing die, the second inner core and the expanding die are all composed of a plurality of die petals.

[0004] The existing expanding and reducing pipe device can only process one length of pipe in most cases. For slightly longer or shorter pipes, it takes a long time to adjust the equipment, which directly causes the cycle of the entire expanding and reducing pipe process to be greatly lengthened, resulting in low work efficiency. In addition, the existing expanding and reducing pipe device can only process one end of the pipe at a time, further increasing the complexity and time-consuming nature of the processing process, making it difficult to meet the actual needs of efficient and batch production. CONTENT OF THE UTILITY MODEL

[0005] The application aims to overcome the shortcomings of the prior art by adopting the method of setting an expanding and reducing pipe mechanism in cooperation with an expansion groove to design an expanding and reducing pipe die, which reduces the equipment adjustment time caused by the length difference of the pipe, effectively improves the work efficiency and greatly simplifies the processing process, and meets the actual needs of efficient and batch production.

[0006] To achieve the above-mentioned purpose, the application provides the following technical solutions:

[0007] The utility model provides an expanding and reducing pipe die, including the workbench, the top of workbench is equipped with expanding and reducing pipe mechanism, the top of workbench is fixedly connected with the support, the inner surface of support is fixedly connected with fixed mechanism, fixed mechanism includes four hydraulic rams of rectangular array distribution, the bottom of four hydraulic rams is fixedly connected with the lifting plate in common, the bottom of lifting plate is slidably connected with two upper clamping plates, the top of workbench is slidably connected with two lower clamping plates, two upper clamping plates are located the upside of two lower clamping plates respectively, and the one end of two upper clamping plates and two lower clamping plates correspondingly is equipped with fixed slot, and the inner surface of four fixed slots is equipped with the bulging groove.

[0008] Preferably, the one end of two upper clamping plates and two lower clamping plates is equipped with two sliding grooves, and the workbench and the lifting plate are fixedly connected with sliding strips matched with the two sliding grooves, the cross section of four sliding strips is trapezoidal, and the two ends of two sliding strips on the same lateral side are fixedly connected with limit strips.

[0009] Preferably, the inner surface of four fixed slots is coated with an anti-slip coating, and the anti-slip coating is made of polyurethane rubber.

[0010] Preferably, the top of two lower clamping plates is fixedly connected with two connecting rods, and the bottom of two upper clamping plates is equipped with rod grooves matched with the two connecting rods.

[0011] Preferably, the expanding and reducing pipe mechanism includes a power motor, one end of the power motor is fixedly connected with one end of the workbench, two long grooves are formed in the top of the workbench, two-way threaded rods are rotatably connected to one end of the long grooves facing away from each other, one end of the power motor penetrates the workbench and is fixedly connected to one end of the two-way threaded rods, and die assemblies are threadedly connected to the two-way threaded rods at positions with different directions of threads.

[0012] Preferably, the die assemblies include pipe pressing slides, the outer surfaces of the pipe pressing slides are slidably connected to the inner surfaces of the long grooves, and the one end of the pipe pressing slides is fixedly connected with expanding and reducing die rods.

[0013] Preferably, the two ends of the two-way threaded rods are rotatably connected to the inner walls of the two long grooves through bearings.

[0014] Compared with the prior art, the application has the following advantages:

[0015] 1. The fixed mechanism is provided, the upper clamping plates and the lower clamping plates at the bottom end of the lifting plate and the top of the workbench are tightly clamped by the hydraulic rods, the device can be quickly and stably fixed to the pipe under the action of the sliding grooves and the sliding strips, the device adjustment time caused by the length difference of the pipe is reduced, and the working efficiency is effectively improved.

[0016] 2、The application sets the expansion and contraction pipe mechanism, under the action of the power motor driving the bidirectional threaded rod rotating, the expansion and contraction mold rod can cooperate with the bulging groove to expand and contract the pipe at both ends, which not only greatly improves the processing precision and stability, but also shortens the processing time from twice to once, greatly simplifies the processing process, and meets the actual needs of efficient and batch production. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structural schematic diagram of the application;

[0018] Fig. 2 It is a schematic diagram of the fixing mechanism in the application;

[0019] Fig. 3 It is a schematic diagram of the upper clamping plate structure in the application;

[0020] Fig. 4 It is a schematic diagram of the expansion and contraction pipe mechanism in the application.

[0021] In the figure: 1, workbench; 2, fixing mechanism; 21, upper clamping plate; 22, lifting plate; 23, hydraulic rod; 24, lower clamping plate; 25, connecting rod; 26, sliding groove; 27, anti-skid coating; 28, fixed groove; 29, rod groove; 30, bulging groove; 3, support; 4, expansion and contraction pipe mechanism; 41, power motor; 42, bidirectional threaded rod; 43, sliding bar; 44, long groove; 5, mold assembly; 51, pipe pressing sliding seat; 52, expansion and contraction mold rod. DETAILED DESCRIPTION

[0022] As Figs. 1-4 shown, the application provides an expansion and contraction pipe mold, which comprises a workbench 1, the top end of the workbench 1 is provided with an expansion and contraction pipe mechanism 4, the top end of the workbench 1 is fixedly connected with a support 3, the inner surface of the support 3 is fixedly connected with a fixing mechanism 2;

[0023] The fixing mechanism 2 comprises four hydraulic rods 23 arranged in a rectangular array, the bottom ends of the four hydraulic rods 23 are fixedly connected with a lifting plate 22, the bottom end of the lifting plate 22 is slidingly connected with two upper clamping plates 21, the top end of the workbench 1 is slidingly connected with two lower clamping plates 24, the two upper clamping plates 21 are located directly above the two lower clamping plates 24, one end of the two upper clamping plates 21 and the two lower clamping plates 24 corresponding to each other is provided with a fixed groove 28, the inner surface of the four fixed grooves 28 is provided with a bulging groove 30, the height position of the upper clamping plate 21 and the lower clamping plate 24 can be adjusted flexibly according to the length of the pipe, which ensures that the pipe can be accurately clamped and positioned, and is conducive to the smooth operation of the subsequent expansion and contraction pipe operation, and improves the processing precision.

[0024] As a preferred way, two upper clamping plates 21 and two lower clamping plates 24 are provided with two sliding grooves 26 at one end, and the workbench 1 and the lifting plate 22 are fixedly connected with sliding bars 43 matched with the two sliding grooves 26, the cross section of the four sliding bars 43 is trapezoidal, and the two ends of the two sliding bars 43 on the same horizontal side are fixedly connected with a limiting strip, which can effectively guide and prevent the clamping plate from slipping during sliding, further improving the reliability and stability of the fixing mechanism 2.

[0025] As shown in Figs. 1 to 4 , the inner surface of the four fixing grooves 28 is coated with an anti-skid coating 27, which is made of polyurethane rubber material, which can increase the friction with the surface of the pipe, even if there is a larger external force during the flaring and reducing pipe process, it can better prevent the pipe from sliding in the fixing groove 28.

[0026] As a preferred way, the top end of the two lower clamping plates 24 is fixedly connected with two connecting rods 25, and the bottom end of the two upper clamping plates 21 is provided with rod grooves 29 matched with the two connecting rods 25, so that the upper and lower clamping plates 21 and 24 can better maintain the accuracy of the relative position during the up and down movement, further enhancing the stability and integrity of the pipe clamping, which helps to improve the fixing effect.

[0027] As shown in Figs. 1 to 4 , the flaring and reducing pipe mechanism 4 includes a power motor 41, one end of the power motor 41 is fixedly connected with one end of the workbench 1, and the top end of the workbench 1 is provided with two long grooves 44, one end of the two long grooves 44 opposite to each other is rotatably connected with a bidirectional threaded rod 42, one end of the power motor 41 penetrates through the workbench 1 and is fixedly connected with one end of the bidirectional threaded rod 42, and the outer surface of the bidirectional threaded rod 42 is threadedly connected with a mold assembly 5 at the positions with different direction threads, realizing the mold action required for flaring or reducing pipe operation of the pipe, which is convenient to operate, stable in power output and can realize automatic control, and can effectively improve the production efficiency.

[0028] As a preferred way, the mold assembly 5 includes a pipe pressing slide 51, the outer surface of the pipe pressing slide 51 is slidably connected with the inner surface of one of the long grooves 44, and one end of the pipe pressing slide 51 is fixedly connected with an expanding and reducing mold rod 52, so that the pipe pressing slide 51 can move smoothly and linearly along the long groove 44 under the drive of the bidirectional threaded rod 42, and the expanding and reducing mold rod 52 and the pipe pressing slide 51 are used for pressing the pipe.

[0029] As shown in Figs. 1 to 4 , both ends of the bidirectional threaded rod 42 are rotatably connected with the inner wall of one side of the two long grooves 44 through bearings, which ensures the stability and smoothness of the bidirectional threaded rod 42 during rotation, and reduces the problems of unstable movement of the mold assembly 5 caused by uneven rotation.

[0030] Wherein, the power motor 41 is prior art, not repeated; At the same time, the application also includes power supply, controller and switch, etc., not the main technical point of the patent, not repeated. The motor wiring diagram in the application belongs to the common knowledge of the art, and its working principle is already known technology, and its model is selected according to the actual use, so the motor is not explained in detail.

[0031] Working principle and process: when the pipe to be processed needs to be fixed, start the hydraulic rod 23, the hydraulic rod 23 receives the corresponding hydraulic power and starts to stretch or shrink, the lifting plate 22 will move up and down, the two upper clamping plates 21 connected with the bottom end of the lifting plate 22 and the two lower clamping plates 24 connected with the top end of the workbench 1 move down together to clamp the pipe. In the process of lifting plate 22 descending, the upper clamping plate 21 also moves down, at this time, the two upper clamping plates 21 are respectively aligned with the two lower clamping plates 24 located below them, when the upper clamping plate 21 and the lower clamping plate 24 approach each other, the pipe is placed between the corresponding upper and lower fixing grooves 28. The inner surface of the four fixing grooves 28 is provided with an expansion groove 30, and the expansion part of the pipe port can be accommodated in the expansion groove 30 during subsequent flaring operation. The top end of the two lower clamping plates 24 is fixedly connected with two connecting rods 25, and the bottom end of the two upper clamping plates 21 is provided with rod grooves 29 matched with the two connecting rods 25, which makes the upper clamping plate 21 and the lower clamping plate 24 better maintain the accuracy of the relative position during the up and down movement, further enhances the stability and integrity of the pipe clamping, and performs flaring and pipe shrinking operation. When the pipe is firmly fixed, start the power motor 41 in the flaring and pipe shrinking mechanism 4, the power motor 41 will drive the bidirectional screw rod 42 to rotate, when the bidirectional screw rod 42 rotates, due to the action of the threads in different directions on its surface, the mold assembly 5 threaded with the bidirectional screw rod 42 will move relatively along the bidirectional screw rod 42. The mold assembly 5 includes a pipe pressing slide 51 and an expansion and contraction mold rod 52, which can complete the flaring and pipe shrinking operation of the pipe through the expansion and contraction mold rod 52 fixed with the pipe pressing slide 51.

Claims

1. A tube expanding and reducing die comprising a table (1), characterized in that: The top end of the workbench (1) is provided with a flared and reduced pipe mechanism (4), and the top end of the workbench (1) is fixedly connected with a support (3), and the inner surface of the support (3) is fixedly connected with a fixing mechanism (2); The fixing mechanism (2) comprises four hydraulic rods (23) arranged in a rectangular array, the bottom ends of the four hydraulic rods (23) are fixedly connected with a lifting plate (22), the bottom end of the lifting plate (22) is slidably connected with two upper clamping plates (21), the top end of the workbench (1) is slidably connected with two lower clamping plates (24), the two upper clamping plates (21) are located directly above the two lower clamping plates (24) respectively, and one end of each of the two upper clamping plates (21) and the two lower clamping plates (24) is provided with a fixing groove (28), and the inner surface of each of the four fixing grooves (28) is provided with an expansion groove (30).

2. A tube expanding and reducing die according to claim 1, wherein: One end of each of the two upper clamping plates (21) and the two lower clamping plates (24) is provided with two sliding grooves (26), and the workbench (1) and the lifting plate (22) are fixedly connected with sliding bars (43) matched with the two sliding grooves (26), the cross sections of the four sliding bars (43) are all trapezoidal, and the two ends of each of the two sliding bars (43) on the same lateral side are fixedly connected with a limiting strip.

3. The flaring and tube reducing die of claim 1 wherein: The inner surface of each of the four fixing grooves (28) is coated with an anti-skid coating (27), and the anti-skid coating (27) is made of polyurethane rubber.

4. The flaring and tube reducing die of claim 1 wherein: The top end of each of the two lower clamping plates (24) is fixedly connected with a connecting rod (25), and the bottom end of each of the two upper clamping plates (21) is provided with a rod groove (29) matched with the two connecting rods (25).

5. The flaring and tube reducing die of claim 1 wherein: The flared and reduced pipe mechanism (4) comprises a power motor (41), one end of the power motor (41) is fixedly connected with one end of the workbench (1), the top end of the workbench (1) is provided with two long grooves (44), two ends of the two long grooves (44) opposite to each other are rotatably connected with a bidirectional threaded rod (42), one end of the power motor (41) penetrates through the workbench (1) and is fixedly connected with one end of the bidirectional threaded rod (42), and the outer surface of the bidirectional threaded rod (42) is threadedly connected with a mold assembly (5) at positions with different direction threads.

6. A tube expanding and reducing die according to claim 5, wherein: The mold assembly (5) comprises a pipe pressing sliding seat (51), and the outer surface of the pipe pressing sliding seat (51) is slidably connected with the inner surface of one of the two long grooves (44), and one end of the pipe pressing sliding seat (51) is fixedly connected with a flared and reduced mold rod (52).

7. A flaring and necking die as defined in claim 5 wherein: Both ends of the bidirectional threaded rod (42) are rotatably connected with the inner walls of the two long grooves (44) on one side through bearings.

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