Capillary copper pipe stretching and cutting device

Abstract

The utility model discloses a capillary copper pipe stretching and cutting-off device which comprises a feeding mechanism, a stretching mechanism for stretching a capillary copper pipe and a cutting-off mechanism for cutting off the reducing end of the capillary copper pipe. The pulling-up mechanism comprises a fixed clamping die used for clamping the reducing end of the capillary copper pipe and a movable clamping die used for clamping the flaring end of the capillary copper pipe, wherein the fixed clamping die and the movable clamping die are arranged in the front-back direction. The movable clamping die can be close to or far away from the fixed clamping die, a stretching die is arranged between the fixed clamping die and the movable clamping die, and a conical stretching hole is formed in the stretching die; and the stretching die can do reciprocating linear motion between the fixed clamping die and the movable clamping die, so that after the diameter reducing end of the capillary copper pipe is clamped by the fixed clamping die, the stretching die moves towards the end of the movable clamping die to stretch the capillary copper pipe. Feeding, forming and discharging are all automatically completed, the working efficiency and the machining quality are high, and the economic benefits of factories are improved.

Description

Technical Field

[0001] The utility model relates to a device for stretching and cutting a capillary copper tube. Background Art

[0002] Copper and copper alloy capillaries, also known as copper capillaries, are a type of pressed and drawn seamless tubes that are strong and corrosion-resistant, lightweight, with good thermal conductivity and high low-temperature strength. They are often used to manufacture heat exchange equipment (such as condensers, etc.). They are also used to assemble low-temperature pipelines in oxygen production equipment. Copper capillaries with small diameters are often used to transport pressurized liquids (such as cooling systems, lubrication systems, oil pressure systems, etc.) and as pressure measuring tubes for instruments.

[0003] Some capillary copper tubes used as joints need to be expanded and formed with a stop ring. Some of the capillary copper tubes need to be stretched after expansion, and before stretching, the unexpanded end of the capillary copper tube needs to be reduced in diameter to form a clamping end during stretching, such as Figure 1 shown.

[0004] The existing stretching process is generally handled manually, and it is difficult to ensure efficiency and quality. Utility Model Content

[0005] In view of this, the utility model provides a capillary copper tube stretching and cutting device to realize the automation of capillary copper tube stretching and cutting.

[0006] In order to solve the above technical problems, the technical solution of the utility model is to adopt a capillary copper tube stretching and cutting device, including a feeding mechanism, a stretching mechanism for stretching the capillary copper tube, and a cutting mechanism for cutting off the reduced diameter end of the capillary copper tube;

[0007] The pulling mechanism includes a fixed clamp arranged in the front-to-back direction for clamping the reduced diameter end of the capillary copper tube and a movable clamp arranged for clamping the expanded end of the capillary copper tube; the movable clamp can be close to or away from the fixed clamp; a stretching die is arranged between the fixed clamp and the movable clamp, and a conical stretching hole is arranged on the stretching die; the stretching die can move back and forth linearly between the fixed clamp and the movable clamp, so that when the fixed clamp clamps the reduced diameter end of the capillary copper tube, the stretching die moves toward the movable clamp end to stretch the capillary copper tube.

[0008] As an improvement, it also includes a lead screw arranged along the movement direction of the stretching mold, and the bottom of the stretching mold and the movable clamping mold are both provided with a slider, and the slider cooperates with the lead screw thread; it also includes a guide column parallel to the lead screw, and the slider passes through the guide column and can slide along the guide column.

[0009] As a further improvement, the fixed clamp includes two clamping blocks arranged in the up and down directions, and the two clamping blocks can be moved closer to or farther away from each other, thereby clamping or releasing the capillary copper tube; the movable clamp is a three-jaw chuck.

[0010] As another further improvement, the cutting mechanism includes a support frame for supporting the capillary copper tube, a mold and an electric saw are arranged in front of the support frame, and a baffle that can move forward and backward is arranged behind the support frame; the baffle can press the capillary copper tube against the mold and then cut it with the electric saw.

[0011] As an improvement, the mold includes a pair of left and right limit blocks, the gap between which is consistent with the diameter of the capillary copper tube after stretching; the left and right limit blocks are divided into two groups, front and rear, with a gap for the power saw to pass through. A rear limit block is arranged behind the left and right limit blocks at the rear.

[0012] As an improvement, a bottom plate for supporting the capillary copper tube is arranged below the left and right limit blocks located in the front.

[0013] As an improvement, the feeding mechanism includes a hopper for storing the capillary copper tubes to be processed, an alignment mechanism for positioning the capillary copper tubes; and a movable tube clamp for transferring the capillary copper tubes between the alignment mechanism and the stretching mechanism and the cutting mechanism.

[0014] As an improvement, the alignment mechanism includes a support frame, and baffles that can move forward and backward are arranged at both ends of the support frame. The two baffles can approach or move away from each other at the same time; and when the two baffles move to the closest position, the distance between them is consistent with the length of the capillary copper tube.

[0015] As an improvement, a material storage table is arranged between the hopper and the alignment mechanism, and the top surface of the material storage table is an inclined surface inclined toward one side of the alignment mechanism, so that when the capillary copper tube is located on the inclined surface, it can roll onto the alignment mechanism; a material fork is arranged between the material storage table and the hopper, and the discharge port of the hopper can only allow one capillary copper tube to pass through at the same time; the gap between the hopper and the material storage table is a slide for the material fork to pass through, and the width of the slide can only accommodate one capillary copper tube; the material fork can deliver the capillary copper tube rolling out of the discharge port to the top surface of the material storage table.

[0016] As an improvement, a material baffle plate is arranged above the material storage table, and the material baffle plate can move up and down.

[0017] The utility model is beneficial in that:

[0018] The capillary copper tube stretching and cutting device with the above structure feeds the material to the alignment mechanism through the material fork, and the axial position of the capillary copper tube is determined by the alignment mechanism. Then the capillary copper tube is sent to the stretching and forming mechanism for stretching through the mobile tube clamp. The irregular tail end of the stretched capillary copper tube is cut off by the cutting mechanism. The utility model automatically completes the whole process from feeding, forming to unloading, and has high working efficiency and processing quality, thereby improving the economic benefits of the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the capillary copper tube to be stretched.

[0020] Figure 2 Schematic diagram of the stretching mechanism.

[0021] Figure 3 to Figure 5 This is a schematic diagram of the working of the stretching mechanism.

[0022] Figure 6 Schematic diagram of the feeding mechanism.

[0023] Figure 7 It is a structural diagram of the alignment mechanism.

[0024] Figure 8 A top view of the cutting mechanism.

[0025] Fig. 9 This is the front view of the cutting mechanism.

[0026] Markings in the figure: 11 fixed clamping die, 12 stretching die, 13 movable clamping die, 14 lead screw, 121 stretching hole; 21 hopper, 22 material fork, 23 material baffle plate, 24 material storage table, 25 support frame, 26 movable pipe clamp, 27 baffle plate; 31 backing die, 32 electric saw, 33 support frame, 34 baffle plate, 311 left and right limit block pair, 312 left and right limit block pair, 313 rear limit block, 314 bottom plate.

[0027] 100 reduced diameter end, 200 expanded end. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0029] like Figure 2 As shown, the utility model provides a capillary copper tube stretching and cutting device, comprising a feeding mechanism, a stretching mechanism for stretching the capillary copper tube, and a cutting mechanism for cutting off the reduced diameter end of the capillary copper tube;

[0030] The pulling mechanism includes a fixed clamping die 11 for clamping the reduced diameter end 100 of the capillary copper tube and a movable clamping die 13 for clamping the expanded end 200 of the capillary copper tube, which are arranged in the front-back direction; the movable clamping die 13 can be close to or away from the fixed clamping die 12. A stretching die 12 is arranged between the fixed clamping die 11 and the movable clamping die 13, and a conical stretching hole 121 is arranged on the stretching die 12; the stretching die 12 can reciprocate linearly between the fixed clamping die 11 and the movable clamping die 13, so that when the fixed clamping die 11 clamps the reduced diameter end 100 of the capillary copper tube, the stretching die 12 moves toward the end of the movable clamping die 13 to stretch the capillary copper tube.

[0031] The principle of the utility model is as follows Figure 3 to Figure 5 As shown, initially, the stretching die 12 is located at the end of the fixed clamping die 11, and the feeding device delivers the capillary copper tube to the movable clamping die 13 to be clamped by the movable clamping die 13. The movable clamping die 13 moves toward the end of the fixed clamping die 11, passes the reduced diameter end 100 of the capillary copper tube through the stretching hole 121 of the stretching die 12, and is then clamped by the fixed clamping die 11. The movable clamping die 13 is reset, and the stretching die 12 moves toward the movable clamping die end 13 to stretch the capillary copper tube. At the same time, the capillary copper tube is clamped by the movable clamping die 13 and then moves toward the end of the fixed clamping die 11 to withdraw the capillary copper tube. After the movable clamping die 13 clamps the capillary copper tube, the fixed clamping die 11 releases the capillary copper tube to complete the stretching work.

[0032] It can be foreseen that, in order to form stretching, the small end of the stretching hole 121 is larger than the reduced diameter end 100 of the capillary copper tube and the large end is smaller than the expanded end 200 of the capillary copper tube.

[0033] In order to facilitate the driving of the movable clamping die 13 and the stretching die 12 to move, a lead screw 14 is also included along the moving direction of the stretching die 12. Slide blocks are provided at the bottom of the stretching die 12 and the movable clamping die 13, and the slide blocks are threadedly matched with the lead screw 14. A guide column parallel to the lead screw 14 is also included, and the slide block is passed through the guide column and can slide along the guide column.

[0034] More specifically, the fixed clamping die 11 includes two clamping blocks arranged in the up-and-down directions, and the two clamping blocks can be moved closer to or farther away from each other, thereby clamping or releasing the capillary copper tube; the movable clamping die is a three-jaw chuck.

[0035] like Figure 6 As shown, the feeding mechanism in the present invention includes a hopper for storing the capillary copper tubes to be processed, an alignment mechanism for positioning the capillary copper tubes, and a movable tube clamp 26 for transferring the capillary copper tubes between the alignment mechanism, the stretching mechanism, and the cutting mechanism.

[0036] Specifically, Figure 7As shown, the alignment mechanism includes a support frame 25, and a V-shaped groove is provided on the support frame 25 for placing the capillary copper tube. The two ends of the support frame 25 are provided with baffles 27 that can move forward and backward, and the two baffles 27 can approach each other or move away from each other at the same time; and when the two baffles 27 move to the closest position, the distance between them is consistent with the length of the capillary copper tube. When the capillary copper tube is placed on the support frame 25, the front and rear baffles 27 are simultaneously close to the capillary copper tube to clamp it, so that the axial position of the capillary copper tube is determined, thereby ensuring that the size of the capillary copper tube sent by the feeding mechanism to the diameter reduction forming mechanism 1 is consistent.

[0037] A material storage table 24 is arranged between the hopper 21 and the alignment mechanism, and the top surface of the material storage table 24 is an inclined surface inclined toward one side of the alignment mechanism, so that when the capillary copper tube is located on the inclined surface, it can roll onto the alignment mechanism; a material fork 22 is arranged between the material storage table 24 and the hopper 21, and the discharge port of the hopper 21 can only allow one capillary copper tube to pass through at the same time; the gap between the hopper 21 and the material storage table 24 is a slideway for the material fork 22 to pass through, and the width of the slideway can only accommodate one capillary copper tube; the material fork 22 can deliver the capillary copper tube rolling out of the discharge port to the top surface of the material storage table 24.

[0038] The capillary copper tubes on the material fork 22 that roll down from the material outlet of the hopper 21 can block the material outlet to prevent excess capillary copper tubes from rolling out. The width of the material fork 22 is consistent with the width of the slideway (the slideway is formed by the side walls of the material storage platform 24 and the side walls of the hopper 21). When the material fork 22 moves upward to feed the material to the material storage platform 24, the side walls of the material fork 22 can close the material outlet. The top surface of the material fork 22 is also an inclined surface. When the height of the material fork 22 exceeds the top surface of the material storage platform 24, the capillary copper tubes on it naturally roll down to the top surface of the material storage platform 24. The material fork 22 can be driven by a linear drive mechanism such as a cylinder or an oil cylinder, which is not limited in the utility model.

[0039] In addition, a baffle plate 23 is provided above the material storage platform 24, and the baffle plate 23 can move up and down. The baffle plate 23 is used to temporarily block the capillary copper tube on the material storage platform 24 to prevent it from rolling onto the support frame 25 of the alignment mechanism. After the capillary copper tube on the support frame 25 is transferred to the feeding mechanism, the baffle plate 23 moves upward to make the capillary copper tube roll onto the support frame 25, thereby improving work efficiency.

[0040] The movable tube clamp 26 can translate left and right, front and back, and move up and down. The alignment mechanism, the stretching mechanism, and the cutting mechanism are arranged side by side, so the movable tube clamp 26 can send the aligned capillary copper tube on the support frame 25 to the movable clamp 13 by translating left and right, front and back, and moving up and down, and then be clamped by the movable clamp 13. After molding, the movable tube clamp 26 will send it to the cutting mechanism.

[0041] like Figure 8 , Fig. 9As shown, in the utility model, the cutting mechanism includes a support frame 33 for supporting the capillary copper tube, a mold 31 and an electric saw 32 are arranged in front of the support frame 33, and a baffle 34 that can move forward and backward is arranged behind the support frame 33; the baffle 34 can press the capillary copper tube against the mold 31 and then cut it by the electric saw 32.

[0042] Specifically, the mold 31 includes a left and right limit block pair, the gap between which is consistent with the diameter of the capillary copper tube after stretching; the left and right limit block pair is divided into two groups, namely, a left and right limit block pair 311 located in the front and a limit block pair 312 located in the rear, with a gap for the electric saw 32 to pass through. A rear limit block 313 is arranged behind the left and right limit block pair 312 located in the rear. The left and right limit block pair can limit the position of the capillary copper tube in the left and right directions, and the rear limit block 313 cooperates with the baffle 34 to determine the axial position of the capillary copper tube. The baffle 34 is driven by a cylinder to push the capillary copper tube against the rear limit block 313, and then the capillary copper tube is cut off by the electric saw through the gap between the two groups of left and right limit blocks in the front and rear directions.

[0043] In addition, in some implementations, a bottom plate 314 for supporting the capillary copper tube is provided below the left and right limit blocks 311 in the front, which can support the capillary copper tube. In addition, the left and right limit blocks 312 in the rear are hollowed out below, and the cut scraps can automatically fall from the hollowed out part.

[0044] The cut capillary copper tube is then transferred to the finished product box by the mobile tube clamp 26 .

[0045] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A capillary copper tube stretching and cutting device, characterized in that: It includes a feeding mechanism, a stretching mechanism for stretching the capillary copper tube, and a cutting mechanism for cutting off the reduced diameter end of the capillary copper tube; The stretching mechanism includes a fixed clamp arranged in the front-to-back direction for clamping the reduced diameter end of the capillary copper tube and a movable clamp arranged in the front-to-rear direction for clamping the expanded end of the capillary copper tube; the movable clamp can be close to or away from the fixed clamp; a stretching die is arranged between the fixed clamp and the movable clamp, and a conical stretching hole is arranged on the stretching die; the stretching die can reciprocate linearly between the fixed clamp and the movable clamp, so that when the fixed clamp clamps the reduced diameter end of the capillary copper tube, the stretching die moves toward the movable clamp end to stretch the capillary copper tube.

2. A capillary copper tube stretching and cutting device according to claim 1, characterized in that: It also includes a lead screw arranged along the movement direction of the stretching die, and the bottom of the stretching die and the movable clamping die are both provided with sliders, and the sliders are matched with the lead screw threads; it also includes a guide column parallel to the lead screw, and the sliders are passed through the guide column and can slide along the guide column.

3. The capillary copper tube stretching and cutting device according to claim 1, characterized in that: The fixed clamping die comprises two clamping blocks arranged in the up-and-down directions, and the two clamping blocks can be moved closer to or farther from each other, thereby clamping or releasing the capillary copper tube; the movable clamping die is a three-jaw chuck.

4. The capillary copper tube stretching and cutting device according to claim 1, characterized in that: The cutting mechanism comprises a support frame for supporting the capillary copper tube, a paving mold and an electric saw are arranged in front of the support frame, and a baffle which can move forward and backward is arranged behind the support frame; the baffle can press the capillary copper tube against the paving mold and then cut it by the electric saw.

5. A capillary copper tube stretching and cutting device according to claim 4, characterized in that: The mold comprises a pair of left and right limit blocks, the gap between which is consistent with the diameter of the capillary copper tube after stretching; the left and right limit block pairs are divided into two groups, front and rear, with a gap for the power saw to pass through; a rear limit block is arranged behind the left and right limit block pairs located at the rear.

6. A capillary copper tube stretching and cutting device according to claim 5, characterized in that: A bottom plate for supporting the capillary copper tube is arranged below the left and right limit blocks located in the front.

7. The capillary copper tube stretching and cutting device according to claim 1, characterized in that: The feeding mechanism comprises a hopper for storing the capillary copper tube to be processed, an alignment mechanism for positioning the capillary copper tube, and a movable tube clamp for transferring the capillary copper tube between the alignment mechanism, the stretching mechanism and the cutting mechanism.

8. The capillary copper tube stretching and cutting device according to claim 7, characterized in that: The alignment mechanism includes a support frame, and baffles that can move forward and backward are arranged at both ends of the support frame. The two baffles can approach or move away from each other at the same time; and when the two baffles move to the closest position, the distance between them is consistent with the length of the capillary copper tube.

9. The capillary copper tube stretching and cutting device according to claim 7, characterized in that: A material storage platform is arranged between the hopper and the alignment mechanism, and the top surface of the material storage platform is an inclined surface inclined toward one side of the alignment mechanism, so that when the capillary copper tube is located on the inclined surface, it can roll onto the alignment mechanism; a material fork is arranged between the material storage platform and the hopper, and the discharge port of the hopper can only allow one capillary copper tube to pass through at the same time; the gap between the hopper and the material storage platform is a slideway for the material fork to pass through, and the width of the slideway can only accommodate one capillary copper tube; the material fork can deliver the capillary copper tube rolling out of the discharge port to the top surface of the material storage platform.

10. The capillary copper tube stretching and cutting device according to claim 9, characterized in that: A material baffle plate is arranged above the material storage platform, and the material baffle plate can move up and down.

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