Full-automatic capillary copper pipe flaring forming device

Abstract

The utility model discloses a full-automatic capillary copper pipe flaring forming device which comprises a feeding mechanism and a flaring forming mechanism. The flaring forming mechanism comprises a forming clamping die used for clamping and fixing the capillary copper pipe and a flaring die set used for flaring the capillary copper pipe. According to the full-automatic capillary copper pipe flaring forming device with the structure, after automatic feeding is conducted through the feeding mechanism, step-by-step flaring and rotary cutting finishing are conducted on the end of a capillary copper pipe through the flaring forming mechanism. After flaring forming, the feeding mechanism pushes the flaring capillary copper pipe away from the forming clamping die while feeding is conducted, and therefore automatic discharging is achieved. The whole machining process is full-automatic, and manual intervention is not needed.

Description

Technical Field

[0001] This utility model belongs to the field of capillary copper tube technology, and in particular relates to a device for flaring and forming capillary copper tubes. Background Technology

[0002] Copper and copper alloy capillary tubes, also known as pure copper capillary tubes, are seamless tubes produced by pressing and drawing. They are strong, corrosion-resistant, lightweight, have good thermal conductivity, and high low-temperature strength. They are commonly used in the manufacture of heat exchange equipment (such as condensers). They are also used in oxygen production equipment for assembling cryogenic pipelines. Small-diameter copper capillary tubes are often used to transport pressurized liquids (such as in cooling systems, lubrication systems, and hydraulic systems) and as pressure measuring tubes in instruments.

[0003] Some capillary copper tubes used as connectors require a 200mm flared end to connect with the condenser tube, such as... Figure 1 As shown, the existing capillary copper tube flaring method is manual, which is relatively low in both processing quality and efficiency. Utility Model Content

[0004] In view of this, the present invention provides a fully automatic capillary copper tube flaring and forming device, which can automatically feed materials and flare and form capillary copper tubes.

[0005] To solve the above technical problems, the technical solution of this utility model is to use a fully automatic capillary copper tube flaring and forming device, including a feeding mechanism and a flaring and forming mechanism.

[0006] The flaring forming mechanism includes a forming mold for clamping and fixing the capillary copper tube and a flaring module for flaring the capillary copper tube; the flaring module includes a series of flaring punches arranged side by side and a rotary cutting flaring punch; there are several flaring punches, and the diameter of the working part for flaring the capillary copper tube increases with each flaring punch; the rotary cutting flaring punch includes an outer mold and a mandrel arranged concentrically; the outer mold and mandrel are fixed on a rotating mounting base and can rotate with the rotating mounting base along the axis; it also includes a cutter fixed on the rotating mounting base, the cutter can rotate with the rotating mounting base, so that while the capillary copper tube is flared by the outer mold and mandrel, the end of the capillary copper tube is cut by the cutter;

[0007] The progressively flaring punch includes a fixed base and a punch body detachably mounted on the fixed base. The punch body includes a rod-shaped working part with a pointed tip at the front end.

[0008] The outer mold includes a cylindrical inner hole, and the mandrel is installed in the inner hole and concentrically arranged with the outer mold; the cutting edge of the cutter is arranged on the circumference outside the mandrel's annular surface; the mandrel is rod-shaped with a pointed tip at its front end.

[0009] As an improvement, the rotary mounting base includes a cylindrical mounting hole, in which the outer mold is fixed and secured by radial locking bolts on the rotary mounting base; a mounting insertion hole is provided at the bottom of the mounting hole, in which the tail end of the mandrel is inserted and secured by radial locking bolts on the rotary mounting base; the cutter is axially arranged along the rotary mounting base and fixed in an axial mounting groove, or the cutter is radially arranged along the rotary mounting base and fixed in a radial mounting groove.

[0010] As a further improvement, the feeding device includes a hopper with a discharge port at the junction of the front wall and bottom of the hopper, allowing only one capillary copper tube to pass through; it also includes a feeding fork located below the hopper that can move back and forth, the top surface of the feeding fork being flat and having a groove; initially, the groove is directly opposite the discharge port, allowing the capillary copper tube in the hopper to fall into the groove; and when the feeding fork moves forward, it can deliver the capillary copper tube that has fallen into the groove to the forming clamp, while the top surface of the feeding fork can close the discharge port.

[0011] As a further improvement, the forming clamp includes two clamping blocks arranged vertically. The lower clamping block is fixed and its top surface is lower than the top surface of the feeding fork, while the upper clamping block can move up and down. The feeding fork includes a telescopic arm and a floating block disposed at the front end of the telescopic arm. The floating block can move up and down, and the groove is opened on the top surface of the floating block, so that when the upper clamping block presses down to clamp the capillary copper tube, the floating block can be pressed down through the capillary copper tube.

[0012] As an improvement, a reset spring for driving the floating block to reset is also included.

[0013] As an improvement, the floating block is connected to the telescopic arm via a rotating shaft, and one end of the return spring is connected to the telescopic arm while the other end is connected to the floating block.

[0014] As an improvement, the front end of the floating block is a slope.

[0015] As an improvement, a support platform is also provided behind the forming mold, and the top surface of the support platform is at the same height as the top surface of the clamping block located below.

[0016] As an improvement, the height of the support platform is adjustable.

[0017] As an improvement, the feeding fork consists of two forks arranged on the left and right sides, respectively, on the front and rear sides of the forming mold.

[0018] The advantages of this utility model are:

[0019] The fully automatic capillary copper tube flaring and forming device with the above structure automatically feeds the capillary copper tube through the feeding mechanism and then uses the flaring and forming mechanism to flare and trim the end of the capillary copper tube step by step.

[0020] To avoid pipe rupture caused by excessive expansion at once, this invention achieves the flaring requirement through gradual expansion. During the final flaring, an external mold is used for sizing, ensuring the flared outer diameter meets the requirements. Simultaneously, a cutting tool is used to rotary-cut and refine the flared end, resulting in neat flared edges that meet product quality requirements.

[0021] After the flaring process, the feeding mechanism simultaneously pushes the flared capillary copper tube off the forming mold, thus achieving automatic unloading. The entire processing is fully automated and requires no manual intervention. Attached Figure Description

[0022] Figure 1 for Figure 1 This is a schematic diagram of the limiting ring and flared end of a capillary copper tube.

[0023] Figure 2 This is a top view of the present invention.

[0024] Figure 3 This is a schematic diagram of a rotary flaring punch.

[0025] Figure 4 This is a schematic diagram of another type of rotary cutting and flaring punch.

[0026] Figure 5 This is a schematic diagram of the initial working state of the feeding mechanism.

[0027] Figure 6 This is a schematic diagram showing the working status of the feeding mechanism during the feeding process.

[0028] Figure 7 This is a schematic diagram of the working state of the feeding mechanism when the clamping block is pressed down.

[0029] Marked in the image:

[0030] 11 Hopper, 12 Feeding fork, 111 Discharge port, 121 Telescopic arm, 122 Floating block, 123 Return spring.

[0031] 41 Forming clamping mold, 42 rotary cutting flaring punch, 43 progressive flaring punch, 44 support table, 411 clamping block, 412 clamping block, 421 rotating mounting base, 422 outer mold, 423 mandrel, 424 cutter, 425 locking bolt, 426 locking bolt; 200 flaring section. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0033] like Figure 2 As shown, this utility model provides a fully automatic capillary copper tube flaring and forming device, including a feeding mechanism and a flaring and forming mechanism.

[0034] like Figure 3 , Figure 4 , Figure 5 As shown, the flaring forming mechanism 4 includes a forming mold 41 for clamping and fixing the capillary copper tube and a flaring module for flaring the capillary copper tube; the flaring module includes a series of flaring punches 43 arranged side by side and a rotary cutting flaring punch 42; there are several series of flaring punches 43, and the diameter of the working part for flaring the capillary copper tube on the series flaring punches 43 increases progressively; the rotary cutting flaring punch 42 includes an outer mold 422 and a mandrel 423 arranged concentrically; the outer mold 422 and the mandrel 423 are fixed on a rotating mounting base 421 and can rotate with the rotating mounting base 421 along the axis; it also includes a cutter 424 fixed on the rotating mounting base 421, the cutter 424 can rotate with the rotating mounting base 421, so that while the capillary copper tube is flared by the outer mold 422 and the mandrel 423, the end of the capillary copper tube is cut by the cutter 424.

[0035] The principle of this invention is that the feeding mechanism feeds the capillary copper tube into the forming mold, and then the flaring forming mechanism 4 flares the end of the capillary copper tube. To avoid pipe rupture caused by excessive expansion at once, this invention achieves the flaring requirement through step-by-step expansion. During the final flaring, an outer mold is used for sizing, ensuring the outer diameter of the flared tube meets the requirements. Simultaneously, a cutting tool is used to rotary cut and correct the flared end, resulting in a neat flared edge that meets product quality requirements.

[0036] In this embodiment, the progressive flaring punch 43 includes a fixed base and a punch body detachably mounted on the fixed base. The punch body includes a rod-shaped working part with a pointed tip at the front end. The number of progressive flaring punches 43 can be determined based on the difference between the flaring size and the original capillary copper tube; the larger the difference, the more progressive flaring punches can be used. In this embodiment, only one progressive flaring punch 43 is selected, and its diameter increases progressively, similar to the mandrel 423 of the rotary flaring punch 42. Of course, when processing other products with larger flaring ratios, a greater number of progressive flaring punches can be selected, with the diameters of the multiple progressive flaring punches 43 increasing progressively. The mandrel 423 has the largest diameter, and its diameter also increases progressively with that of the progressive flaring punch 43 with the largest diameter, thereby achieving the purpose of progressive flaring.

[0037] The outer mold 422 includes a cylindrical inner hole, and the mandrel 423 is installed in the inner hole and concentrically arranged with the outer mold 422; the cutting edge of the cutter 424 is located on the circumference outside the annular surface of the mandrel 423; the mandrel 423 is rod-shaped with a pointed tip at its front end. In the flaring forming process, not only must the inner diameter of the flared section meet the requirements, but the outer diameter must also be controlled. In this utility model, the outer diameter is controlled by the outer mold, and the inner diameter is controlled by the mandrel, thereby achieving the processing requirements. In addition, the outer mold 422 can also prevent the capillary copper tube from breaking when the flaring is at its maximum (when the diameter of the mandrel 423 is at its maximum). Since the rotating mounting base 421 rotates at high speed, the outer mold 422, mandrel 423, and cutter 424 fixed on the rotating mounting base 421 also rotate at high speed. Therefore, the cutter can perform rotational cutting on the flared end of the capillary copper tube, resulting in a flat end for the product.

[0038] like Figure 3 As shown, more specifically, the rotary mounting base 421 includes a cylindrical mounting hole, the outer mold 422 is fixed in the mounting hole and fastened by radial locking bolts 425 on the rotary mounting base 421; a mounting insertion hole is provided at the bottom of the mounting hole, the tail end of the mandrel 423 (the tail end can be a square column that mates with the mounting insertion hole to prevent rotation) is inserted into the mounting insertion hole and fastened by radial locking bolts 426 on the rotary mounting base 421; the cutter 424 is arranged axially along the rotary mounting base 421 and fixed in the axial mounting groove, or, as... Figure 4 As shown, the cutter 424 is radially arranged along the rotary mounting base 421 and fixed in the radial mounting groove. With this arrangement, the outer mold 422, mandrel 423, and cutter 424 can be easily replaced to accommodate products of different specifications.

[0039] Since the capillary copper tube only moves axially throughout the entire processing, to ensure that each station of the flaring module can process the capillary copper tube, the flaring module is fixed on a planar motion platform (not shown in the figure). This planar motion platform can move horizontally in both left-right and front-back directions. The step-by-step flaring punch 43 and the rotary flaring punch 42 are arranged side-by-side. During operation, the step-by-step flaring punch 43 moves forward under the drive of the planar motion platform and inserts into the end of the capillary copper tube to flare it. After flaring, the step-by-step flaring punch 43 is withdrawn from the capillary copper tube. The rotary flaring punch 42 operates in the same manner and will not be described further here.

[0040] like Figure 5As shown, in this embodiment, the feeding device includes a hopper 11, with a discharge port 111 at the junction of the front wall and bottom of the hopper 11 for only one capillary copper tube to pass through; it also includes a feeding fork 12 that can move back and forth below the hopper 11, with the top surface of the feeding fork 12 being flat and having a groove; in the initial state, the groove is directly opposite the discharge port 111, so that the capillary copper tube in the hopper 11 can fall into the groove; and when the feeding fork 12 moves forward, it can send the capillary copper tube that has fallen into the groove to the forming mold 41, while the top surface of the feeding fork 12 can close the discharge port.

[0041] The discharge port 111 is formed by cutting off the bottom corner of the hopper 11. Its width is sufficient to allow a capillary copper tube to pass through, and its height needs to be matched with the groove on the feeding fork 12 to allow a capillary copper tube to pass through. Furthermore, since the top surface of the feeding fork 12 is flat except for the groove, it cannot provide enough space for the capillary copper tube to fall, so the top surface of the feeding fork can close the discharge port during the feeding process.

[0042] The feeding fork 12 can be driven to move back and forth by a linear drive mechanism, such as a hydraulic cylinder or a pneumatic cylinder, but this utility model does not impose any restrictions.

[0043] Of course, it is foreseeable that there can be two feeding forks 12 arranged side by side on the left and right. The two feeding forks 12 support the two ends of the capillary copper tube for feeding, making it easier for the capillary copper tube to maintain balance. The two feeding forks are respectively located on the front and rear sides of the forming mold 41.

[0044] When the feed fork 12 delivers the capillary copper tube to the forming mold 41 where it is clamped, the feed fork 12 retracts to prepare for the next feed. During the retraction process, the copper tube is easily scratched. To solve this problem, such as... Figure 7 As shown, the forming mold 41 of this utility model includes two clamping blocks arranged in the vertical direction. The clamping block 412 located below is fixedly arranged and its top surface is lower than the top surface of the feeding fork 12. The clamping block 411 located above can move up and down to clamp or release. The feeding fork 12 includes a telescopic arm 121 and a floating block 122 located at the front end of the telescopic arm 121. The floating block 122 can move up and down. The groove is opened on the top surface of the floating block 122, so that when the clamping block 411 located above presses down to clamp the capillary copper tube, the floating block 122 can be pressed down through the capillary copper tube.

[0045] The floating block 122 can move up and down, and its initial position is higher than the clamping block 412 located below, making it easier to feed materials. After being clamped by the forming mold 41, the floating block 122 can also avoid damage to the capillary copper tube during the retraction process.

[0046] More specifically, it also includes a reset spring 123 for driving the floating block 122 to reset. The floating block 122 is connected to the telescopic arm 121 via a rotating shaft, and one end of the reset spring 123 is connected to the telescopic arm 121 and the other end is connected to the floating block 122.

[0047] like Figure 6 As shown, during the feeding process, the floating block 122 can also push the capillary copper tube (which has been flared) located on the clamping block 412 of the forming mold 41 away from the clamping block 412 to complete the unloading. In order to better push the capillary copper tube away from the clamping groove on the clamping block 412, the front end of the floating block 122 is inclined for guidance.

[0048] In addition, since the capillary copper tube is relatively long, in order to ensure that the entire capillary copper tube is on a horizontal plane, a support platform 44 is provided behind the forming mold 41. The top surface of the support platform 44 is at the same height as the top surface of the clamping block 412 located below, and the height of the support platform 44 is adjustable.

[0049] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A fully automatic capillary copper tube flaring forming device, characterized by: Includes a feeding mechanism and a flaring and forming mechanism; The flaring forming mechanism includes a forming mold for clamping and fixing the capillary copper tube and a flaring module for flaring the capillary copper tube; the flaring module includes a series of flaring punches arranged side by side and a rotary cutting flaring punch; there are several flaring punches, and the diameter of the working part for flaring the capillary copper tube increases with each flaring punch; the rotary cutting flaring punch includes an outer mold and a mandrel arranged concentrically; the outer mold and mandrel are fixed on a rotating mounting base and can rotate with the rotating mounting base along the axis; it also includes a cutter fixed on the rotating mounting base, the cutter can rotate with the rotating mounting base, so that while the capillary copper tube is flared by the outer mold and mandrel, the end of the capillary copper tube is cut by the cutter; The progressively flaring punch includes a fixed base and a punch body detachably mounted on the fixed base. The punch body includes a rod-shaped working part with a pointed tip at the front end. The outer mold includes a cylindrical inner hole, and the mandrel is installed in the inner hole and concentrically arranged with the outer mold; the cutting edge of the cutter is arranged on the circumference outside the mandrel's annular surface; the mandrel is rod-shaped with a pointed tip at its front end.

2. The full-automatic capillary copper tube flaring forming device according to claim 1, characterized in that: The rotary mounting base includes a cylindrical mounting hole, in which the outer mold is fixed and secured by radial locking bolts on the rotary mounting base; a mounting insertion hole is provided at the bottom of the mounting hole, in which the tail end of the mandrel is inserted and secured by radial locking bolts on the rotary mounting base; the cutter is axially arranged along the rotary mounting base and fixed in an axial mounting groove, or the cutter is radially arranged along the rotary mounting base and fixed in a radial mounting groove.

3. The fully automatic capillary copper tube flaring device according to claim 1, characterized in that: The feeding mechanism includes a hopper with a discharge port at the junction of the front wall and bottom of the hopper, allowing only one capillary copper tube to pass through. It also includes a feeding fork located below the hopper and capable of moving back and forth. The top surface of the feeding fork is flat and has a groove. In the initial state, the groove is directly opposite the discharge port, allowing the capillary copper tube in the hopper to fall into the groove. When the feeding fork moves forward, it can deliver the capillary copper tube that has fallen into the groove to the forming clamp, and at the same time, the top surface of the feeding fork can close the discharge port.

4. The fully automatic capillary copper tube flaring device according to claim 3, characterized in that: The forming clamping mold includes two clamping blocks arranged vertically. The lower clamping block is fixed and its top surface is lower than the top surface of the feeding fork. The upper clamping block can move up and down. The feeding fork includes a telescopic arm and a floating block arranged at the front end of the telescopic arm. The floating block can move up and down. The groove is opened on the top surface of the floating block, so that when the upper clamping block presses down to clamp the capillary copper tube, the floating block can be pressed down through the capillary copper tube.

5. The fully automatic capillary copper tube flaring device according to claim 4, characterized in that: It also includes a reset spring for driving the floating block to reset.

6. The fully automatic capillary copper tube flaring device according to claim 5, characterized in that: The floating block is connected to the telescopic arm via a rotating shaft, and one end of the reset spring is connected to the telescopic arm while the other end is connected to the floating block.

7. The fully automatic capillary copper tube flaring device according to claim 4, characterized in that: The front end of the floating block is a slope.

8. The fully automatic capillary copper tube flaring device according to claim 4, characterized in that: A support platform is also provided behind the forming mold, and the top surface of the support platform is at the same height as the top surface of the clamping block located below.

9. The fully automatic capillary copper tube flaring device according to claim 8, characterized in that: The height of the support platform is adjustable.

10. The fully automatic capillary copper tube flaring device according to claim 3, characterized in that: The feeding forks are two forks arranged on the left and right sides, respectively, and are located on the front and rear sides of the forming mold.

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