Automatic tube expander

Abstract

The application discloses an automatic pipe expander, which comprises a workpiece placing platform, a rotating device arranged on the side of the workpiece placing platform, a lifting mechanism connected with the workpiece placing platform, a robot arranged on one side of the workpiece placing platform, a detection mechanism arranged on the robot, a shaft compensation mechanism arranged on the robot, a pipe expander device connected with the shaft compensation mechanism and a torque sensor arranged on the pipe expander device. The shaft compensation mechanism is mounted on the robot, and the detection mechanism is fixedly mounted on the robot. The automatic pipe expander adopts a servo torque expansion method, can control the pipe expansion through the accurate torque output, can automatically stop the pipe expansion immediately after the preset output torque value is reached, can automatically reverse and exit, can avoid excessive or insufficient pipe expansion, can realize the maximum holding strength of a single pipe, can reduce the labor intensity, and can realize the accurate control of the torque output.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe expander, in particular to automatic pipe expander. BACKGROUND

[0002] Pipe expander is a key equipment of an important component of heat exchanger in air compressor, its principle is: using an expander rod, setting an expander ball larger than the diameter of copper pipe on the end face of the expander rod; under the action of external force, the expander ball is pressed to the copper pipe, the copper pipe is expanded, so as to make it closely contact with the cooling fin and avoid loosening; at present, the pipe expanders on the market have the following defects: 1, the expansion precision is difficult to control, and the product quality is difficult to guarantee; 2, the process is complex, the production time is long, the labor is increased, and the manufacturing cost is also increased; 3, the operation and control are complex, which is not conducive to production.

[0003] In view of the above situation, it is necessary to improve the existing automatic pipe expander, so that it can adapt to the needs of the use of pipe expander. SUMMARY

[0004] The purpose of the present application is to solve the above problems, and an automatic pipe expander is designed.

[0005] The technical scheme for realizing the above purpose is that the automatic pipe expander comprises a workpiece placing platform, a rotating device arranged on the side of the workpiece placing platform, a lifting mechanism connected with the workpiece placing platform, a robot arranged on one side of the workpiece placing platform, a detection mechanism arranged on the robot, a shaft compensation mechanism arranged on the robot, an expander device connected with the shaft compensation mechanism, and a torque sensor arranged on the expander device.

[0006] Further supplement to the technical scheme, the workpiece placing platform comprises a limiting tool, and the limiting tool is set according to the model of the product to match the product and limit the product.

[0007] Further supplement to the technical scheme, the rotating device comprises a driving device arranged on one side of the workpiece placing platform and a driven device arranged on the other side of the workpiece placing platform, and the workpiece placing platform is arranged between the driving device and the driven device.

[0008] Further supplement to the technical solution, the first moving mechanism is arranged below the driving device and the driven device, the first moving mechanism comprises a support platform, a support mechanism arranged around the support platform, a first driving motor arranged on the support platform, a screw moving mechanism connected with the first driving motor, a plurality of first sliders arranged on the front and back sides below the driving device and the driven device, and a first sliding rail arranged below the first sliders, the first driving motor is fixedly installed on the support platform, the first sliding rail is fixedly installed on the support platform, and the driving device and the driven device are connected with the screw moving mechanism below.

[0009] Further supplement to the technical solution, the driving device comprises a support frame, second sliding rails arranged on the front and back sides of the support frame, second sliders arranged on the second sliding rails, a moving plate arranged on the second sliders, a driving mechanism connected with the moving plate, a rotary control device arranged on the moving plate, and a first clamping frame arranged on the support frame, the first clamping frame is fixedly installed on the support frame, the lower surface of the moving plate is fixedly connected with the upper surface of the second slider, the second sliding rail is fixedly installed on the support frame, the rotary control device is fixedly installed on the moving plate, the lower surface of the support frame is fixedly connected with the upper surface of the first slider, the driven device comprises a connecting frame and a second clamping frame arranged on the connecting frame close to one side of the workpiece placing platform, the first clamping frame and the second clamping frame are the same structure and are symmetrically arranged on the left and right sides, the support frame and the connecting frame are arranged on the first moving mechanism on the two sides respectively, the lower surface of the connecting frame is fixedly connected with the upper surface of the first slider, and the screw moving mechanism is connected with the support frame and the connecting frame respectively.

[0010] Further supplement to the technical solution, the first clamping frame and the second clamping frame are provided with a U-shaped groove in the middle.

[0011] Further supplement to the technical solution, the rotary control device comprises a protection frame, a control motor arranged on one side of the protection frame, a gear connecting mechanism connected with the control motor, and a clamping mechanism connected with the gear connecting mechanism, the protection frame is fixedly installed on the moving plate, the control motor is fixedly installed on the protection frame, and the clamping mechanism is arranged on the side of the protection frame close to the first clamping frame.

[0012] Further supplement to the technical solution, the lifting mechanism includes a limiting frame, a lifting control mechanism arranged on the limiting frame, a lead screw connecting mechanism connected with the lifting control mechanism, a connecting plate connected with the lead screw connecting mechanism, and a fixing frame fixedly connected with the connecting plate.

[0013] Further supplement to the technical solution, the pipe expanding device uses a servo motor as a power source.

[0014] The operation method of the automatic pipe expanding machine comprises the following steps:

[0015] Step one: first, place the product to be expanded on the first and second clamping frames;

[0016] Step two: after the product is loaded in place, the robot drives the detection mechanism to read the product fixture two-dimensional code to automatically identify the product type, and the equipment automatically matches the corresponding program formula;

[0017] Step three: the rotating device clamps and fixes the product;

[0018] Step four: the lifting mechanism works to make the workpiece placement platform contact the lower surface of the product;

[0019] Step five: the robot drives the pipe expanding device to expand the product;

[0020] Step six: after expanding one side of the product, the control rotating device rotates to expand the other side of the product;

[0021] During the operation of the pipe expanding device, the shaft compensation mechanism can control the working compensation of the pipe expanding head of the pipe expanding device to maintain the concentricity of the pipe expander and the pipe hole; the torque sensor can control the torque of the product to prevent overexpansion and underexpansion.

[0022] The automatic pipe expanding machine adopts a servo torque expansion method, which can control the pipe expansion by outputting accurate torque, can automatically stop the pipe expansion immediately after the pre-set output torque value is reached, and can automatically reverse and exit, thereby avoiding excessive or insufficient rolling expansion (overexpansion and underexpansion) of the pipe, achieving the maximum holding strength of a single pipe, reducing labor intensity, and achieving accurate control of torque output. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is the first angle overall structure schematic diagram of the application;

[0024] Fig. 2 is the second angle overall structure schematic diagram of the application;

[0025] Fig. 3 is the third angle overall structure schematic diagram of the application;

[0026] In the figure, 1, workpiece placing platform; 11, limiting tooling; 2, rotating device; 21, driving device; 211, support frame; 212, second sliding rail; 213, second sliding block; 214, moving plate; 215, driving mechanism; 216, rotating control device; 2161, protection frame; 2162, control motor; 2163, gear connecting mechanism; 2164, clamping mechanism; 217, first clamping frame; 22, driven device; 221, connecting frame; 222, second clamping frame; 23, U-shaped groove; 3, lifting mechanism; 31, limiting frame; 32, lifting control mechanism; 33, screw connecting mechanism; 34, connecting plate; 35, fixed frame; 36, third sliding block; 37, third sliding rail; 4, robot; 5, detection mechanism; 6, shaft compensation mechanism; 7, pipe expanding device; 8, torque sensor; 9, first moving mechanism; 91, support platform; 92, support mechanism; 93, first driving motor; 94, screw moving mechanism; 95, first sliding block; 96, first sliding rail. DETAILED DESCRIPTION

[0027] In order to make the technical solution more clear to those skilled in the art, the structure of the workpiece placing platform 1 will be described in detail below with reference to the accompanying drawings. Figs. 1-3 The technical solution of the application will be described in detail as follows:

[0028] The automatic pipe expander comprises a workpiece placing platform 1, a rotating device 2 arranged on one side of the workpiece placing platform 1, a lifting mechanism 3 connected with the workpiece placing platform 1, a robot 4 arranged on one side of the workpiece placing platform 1, a detection mechanism 5 arranged on the robot 4, a shaft compensation mechanism 6 arranged on the robot 4, a pipe expanding device 7 connected with the shaft compensation mechanism 6, and a torque sensor 8 arranged on the pipe expanding device 7. The shaft compensation mechanism 6 is installed on the robot 4, and the detection mechanism 5 is fixedly installed on the robot 4. The detection mechanism 5 is a 2D vision camera. A lubricating system is further arranged in the technical solution, which can automatically spray cooling liquid during the pipe expanding process of the pipe expanding device 7. The lifting mechanism 3 can adjust all copper pipes to the same plane and keep them in the appropriate position, which facilitates subsequent pipe expanding operations.

[0029] The structure of the workpiece placing platform 1 will be described in detail as follows. The workpiece placing platform 1 comprises a limiting tooling 11. The limiting tooling 11 is arranged according to the model of the product so as to match the product and limit the product, which facilitates the installation according to the model of the product and facilitates better pipe expanding of the product subsequently.

[0030] The structure of the rotating device 2 will be described in detail below. The rotating device 2 comprises a driving device 21 arranged on one side of the workpiece placing platform 1, a driven device 22 arranged on the other side of the workpiece placing platform 1, and the workpiece placing platform 1 is arranged between the driving device 21 and the driven device 22. The first moving mechanism 9 is arranged below the driving device 21 and the driven device 22, respectively. The first moving mechanism 9 comprises a support platform 91, a support mechanism 92 arranged around the lower side of the support platform 91, a first driving motor 93 arranged on the support platform 91, a lead screw moving mechanism 94 connected with the first driving motor 93, a plurality of first sliding blocks 95 arranged on the front and back sides below the driving device 21 and the driven device 22, and a first sliding rail 96 arranged below the first sliding block 95. The first driving motor 93 is fixedly installed on the support platform 91, and the first sliding rail 96 is fixedly installed on the support platform 91. The driving device 21 and the driven device 22 are respectively connected with the lead screw moving mechanism 94 below. The arrangement of the first moving mechanism 9 facilitates better installation of products according to the model of the products, and has higher applicability.

[0031] The structure of the active device 21 will be described in detail below. The active device 21 comprises a support frame 211, second slide rails 212 arranged on the front and rear sides of the support frame 211, second slide blocks 213 arranged on the second slide rails 212, a moving plate 214 arranged on the second slide blocks 213, a driving mechanism 215 connected with the moving plate 214, a rotary control device 216 arranged on the moving plate 214, a first clamping frame 217 arranged on the support frame 211, the first clamping frame 217 being fixedly installed on the support frame 211, the lower surface of the moving plate 214 being fixedly connected with the upper surface of the second slide block 213, the second slide rails 212 being fixedly installed on the support frame 211, the rotary control device 216 being fixedly installed on the moving plate 214, the lower surface of the support frame 211 being fixedly connected with the upper surface of the first slide block 95, the driven device 22 comprising a connecting frame 221 and a second clamping frame 222 arranged on the connecting frame 221 near the side of the workpiece placing platform 1, the first clamping frame 217 and the second clamping frame 222 being the same structure and symmetrically arranged on the left and right sides, the support frame 211 and the connecting frame 221 being arranged on the first moving mechanisms 9 on the two sides respectively, the lower surface of the connecting frame 221 being fixedly connected with the upper surface of the first slide block 95, the lead screw moving mechanism 94 being connected with the support frame 211 and the connecting frame 221 respectively, wherein, a U-shaped groove 23 is arranged in the middle of the first clamping frame 217 and the second clamping frame 222; in detail, the rotary control device 216 comprises a protection frame 2161, a control motor 2162 arranged on one side of the protection frame 2161, a gear connecting mechanism 2163 connected with the control motor 2162, and a clamping mechanism 2164 connected with the gear connecting mechanism 2163, the protection frame 2161 being fixedly installed on the moving plate 214, the control motor 2162 being fixedly installed on the protection frame 2161, the clamping mechanism 2164 being arranged on the side of the protection frame 2161 near the first clamping frame 217, wherein, the clamping mechanism 2164 is a three-jaw chuck, the control motor 2162 can control the gear connecting mechanism 2163 to work and drive the clamping mechanism 2164 to rotate, so that the product connected with the clamping mechanism 2164 can be rotated on the first clamping frame 217 and the second clamping frame 222, and the other side of the product can be expanded.

[0032] The structure of the lifting mechanism 3 will be described in detail below, the lifting mechanism 3 comprises a limiting frame 31, a lifting control mechanism 32 arranged on the limiting frame 31, a lead screw connecting mechanism 33 connected with the lifting control mechanism 32, a connecting plate 34 connected with the lead screw connecting mechanism 33, and a fixed frame 35 fixedly connected with the connecting plate 34, wherein the limiting frame 31 is fixed on the ground or the working platform, the lifting control mechanism 32 is fixedly installed on the limiting frame 31, the connecting plate 34 is provided with a plurality of third sliding blocks 36 symmetrically arranged in front and back near one side of the limiting frame 31, the limiting frame 31 is further provided with a third sliding rail 37 in the longitudinal direction of the third sliding blocks 36, the third sliding blocks 36 are slidingly installed on the third sliding rail 37, and the upper end of the fixed frame 35 is fixedly connected with the lower end of the limiting tool 11.

[0033] The pipe expanding device 7 is powered by a servo motor; before work, the robot 4 can quickly identify the model, select the pipe expanding program according to the model, and automatically position and correct the verticality and horizontality of the installation surface; during the pipe expanding process, the robot 4 can automatically spray cooling liquid; the robot 4 is equipped with a database to store all pipe expanding model parameters; before pipe expanding, the robot 4 scans and checks the copper pipe on the product through the detection mechanism 5, and can only expand the pipe after confirming that the copper pipe is installed correctly.

[0034] The operation method of the automatic pipe expanding machine comprises the following steps:

[0035] Step one: first, place the product to be expanded on the first clamping frame 217 and the second clamping frame 222;

[0036] Step two: after the product is loaded in place, the robot 4 drives the detection mechanism 5 to read the product two-dimensional code to automatically identify the product type, and the equipment automatically matches the corresponding program formula;

[0037] Step three: the rotating device 2 clamps and fixes the product;

[0038] Step four: the lifting mechanism 3 works to make the workpiece placing platform 1 contact with the lower surface of the product;

[0039] Step five: the robot 4 drives the pipe expanding device 7 to expand the product;

[0040] Step six: after the pipe expanding operation on one side of the product, the control rotating device 2 rotates to perform the pipe expanding operation on the other side of the product;

[0041] During the working process of the pipe expanding device 7, the shaft compensation mechanism 6 can control the working compensation of the pipe expanding head of the pipe expanding device 7 to maintain the concentricity of the pipe expander and the pipe hole; the torque sensor 8 can realize the torque control of the product to prevent overexpansion and underexpansion.

[0042] The above technical solution only reflects the preferred technical solution of the present application, and some changes made by the skilled in the art to some parts thereof also reflect the principle of the present application and are within the protection scope of the present application.

Claims

1. An automatic tube expander, characterized in that, The device includes a workpiece placement platform (1), a rotating device (2) disposed on the side of the workpiece placement platform (1), a lifting mechanism (3) connected to the workpiece placement platform (1), a robot (4) disposed on one side of the workpiece placement platform (1), a detection mechanism (5) disposed on the robot (4), a shaft compensation mechanism (6) disposed on the robot (4), a tube expansion device (7) connected to the shaft compensation mechanism (6), and a torque sensor (8) disposed on the tube expansion device (7). The shaft compensation mechanism (6) is mounted on the robot (4), and the detection mechanism (5) is fixedly mounted on the robot (4).

2. The automatic tube expander according to claim 1, characterized in that, The workpiece placement platform (1) includes a limiting fixture (11), which is set according to the product model to match the product and limit the product.

3. The automatic tube expander according to claim 2, characterized in that, The rotating device (2) includes an active device (21) disposed on one side of the workpiece placement platform (1) and a driven device (22) disposed on the other side of the workpiece placement platform (1). The workpiece placement platform (1) is disposed between the active device (21) and the driven device (22).

4. The automatic tube expander according to claim 3, characterized in that, The active device (21) and the driven device (22) are respectively provided with a first moving mechanism (9). The first moving mechanism (9) includes a support platform (91), a support mechanism (92) arranged around the support platform (91), a first drive motor (93) arranged on the support platform (91), a lead screw moving mechanism (94) connected to the first drive motor (93), a plurality of first sliders (95) arranged on the front and rear sides below the active device (21) and the driven device (22), and a first slide rail (96) arranged below the first sliders (95). The first drive motor (93) is fixedly installed on the support platform (91), and the first slide rail (96) is fixedly installed on the support platform (91). The active device (21) and the driven device (22) are respectively connected to the lead screw moving mechanism (94) below.

5. The automatic tube expander according to claim 4, characterized in that, The active device (21) includes a support frame (211), second slide rails (212) disposed on the front and rear sides of the support frame (211), a second slider (213) disposed on the second slide rails (212), a movable plate (214) disposed on the second slider (213), a drive mechanism (215) connected to the movable plate (214), a rotation control device (216) disposed on the movable plate (214), and a first card holder (217) disposed on the support frame (211). The first card holder (217) is fixedly installed on the support frame (211). The lower surface of the movable plate (214) is fixedly connected to the upper surface of the second slider (213). The second slide rails (212) are fixedly installed on the support frame (211). The rotation control device (216) is fixedly installed on the moving plate (214). The lower surface of the support frame (211) is fixedly connected to the upper surface of the first slider (95). The driven device (22) includes a connecting frame (221) and a second card holder (222) disposed on the connecting frame (221) near the workpiece placement platform (1). The first card holder (217) and the second card holder (222) have the same structure and are symmetrically arranged on the left and right. The support frame (211) and the connecting frame (221) are respectively disposed on the first moving mechanism (9) on both sides. The lower surface of the connecting frame (221) is fixedly connected to the upper surface of the first slider (95). The screw moving mechanism (94) is connected to the support frame (211) and the connecting frame (221) respectively.

6. The automatic tube expander according to claim 5, characterized in that, The first card holder (217) and the second card holder (222) are provided with a U-shaped groove (23) in the middle.

7. The automatic tube expander according to claim 5, characterized in that, The rotation control device (216) includes a protective frame (2161), a control motor (2162) disposed on one side of the protective frame (2161), a gear connecting mechanism (2163) connected to the control motor (2162), and a clamping mechanism (2164) connected to the gear connecting mechanism (2163). The protective frame (2161) is fixedly installed on the moving plate (214), the control motor (2162) is fixedly installed on the protective frame (2161), and the clamping mechanism (2164) is disposed on the side of the protective frame (2161) near the first card holder (217).

8. The automatic tube expander according to claim 2, characterized in that, The lifting mechanism (3) includes a limiting frame (31), a lifting control mechanism (32) set on the limiting frame (31), a screw connection mechanism (33) connected to the lifting control mechanism (32), a connecting plate (34) connected to the screw connection mechanism (33), and a fixing frame (35) fixedly connected to the connecting plate (34). The limiting frame (31) is fixed on the ground or a working platform. The lifting control mechanism (32) is fixedly installed on the limiting frame (31). The connecting plate (34) has multiple third sliders (36) symmetrically arranged on the side close to the limiting frame (31). The limiting frame (31) also has a third slide rail (37) located longitudinally on the third slider (36). The third slider (36) is slidably installed on the third slide rail (37). The upper end of the fixing frame (35) is fixedly connected to the lower end of the limiting fixture (11).

9. The automatic tube expander according to claim 1, characterized in that, The tube expansion device (7) is powered by a servo motor.

10. The operating method of the automatic tube expander according to any one of claims 5-7, characterized in that, Includes the following steps: Step 1: First, place the product that needs to be expanded on the first card holder (217) and the second card holder (222); Step 2: After the product is loaded into place, the robot (4) drives the testing mechanism (5) to read the product tooling QR code and automatically identify the product type. The equipment automatically matches the corresponding program formula. Step 3: The rotating device (2) clamps and fixes the product; Step 4: The lifting mechanism (3) operates to bring the workpiece placement platform (1) into contact with the lower surface of the product; Step 5: The robot (4) drives the tube expansion device (7) to expand the tube of the product; Step 6: After expanding one side of the product, control the rotating device (2) to rotate and expand the other side of the product; Among them, the shaft compensation mechanism (6) during the operation of the tube expansion device (7) can control the tube expansion head working compensation of the tube expansion device (7) to maintain the concentricity of the tube expander and the tube hole; the torque sensor (8) can realize the torque control of the product to prevent over-expansion and under-expansion.

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