Capillary copper pipe flaring forming machine

Abstract

The invention discloses a capillary copper pipe flaring forming machine. The capillary copper pipe flaring forming machine comprises a straightening mechanism, a cutting mechanism and a flaring forming mechanism which are sequentially arranged from front to back. An advancing driving mechanism for driving the capillary copper pipe to advance is arranged between the straightening mechanism and the cutting mechanism; in the invention, the three procedures of straightening, forming and cutting are integrated into one procedure, so that the production efficiency is improved, and the process production line is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of capillary copper tubes, and in particular relates to a device for straightening and expanding 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 to connect with condenser tubes, such as Figure 1 As shown. Before expanding, the capillary copper tube wound into a disc needs to be straightened and cut into a suitable length. In the prior art, the above three processes are performed by manual tooling, which is inefficient and the quality cannot be guaranteed. Summary of the invention

[0004] In view of this, the present invention provides a capillary copper tube expansion forming machine, which can efficiently and high-quality complete the straightening, expansion forming and cutting processes of the capillary copper tube.

[0005] In order to solve the above technical problems, the technical solution of the present invention is to adopt a capillary copper tube expansion and forming machine, which includes a straightening mechanism, a cutting mechanism, and an expansion and forming mechanism arranged in sequence from front to back; a travel driving mechanism for driving the capillary copper tube to travel is arranged between the straightening mechanism and the cutting mechanism;

[0006] The expansion forming mechanism includes a forming clamp for clamping and fixing the capillary copper tube and an expansion module for expanding the capillary copper tube; the expansion module includes a step-by-step expansion punch and a rotary expansion punch arranged side by side; the step-by-step expansion punches are multiple, and the diameter of the working part of the step-by-step expansion punches used for expanding the capillary copper tube increases gradually; the rotary expansion punch includes a concentrically arranged outer die and a core rod; the outer die and the core rod are fixed on a rotating mounting seat and can rotate along the axis with the rotating mounting seat; it also includes a cutter fixed on the rotating mounting seat, and the cutter can rotate with the rotating mounting seat, so that the capillary copper tube is expanded by the outer die and the core rod, and the end of the capillary copper tube is cut by the cutter.

[0007] As an improvement, the step-by-step expanding punch comprises a fixing seat and a punch body detachably mounted on the fixing seat, the punch body comprises a rod-shaped working portion, and the front end of the working portion is a pointed end.

[0008] As a further improvement, the outer mold includes a cylindrical inner hole, and the core rod is installed in the inner hole and is concentric with the outer mold; the cutting edge of the cutter is arranged on the circumference outside the annular surface of the core rod; the core rod is rod-shaped, and its front end is a pointed tip.

[0009] As an improvement, the rotating mounting seat includes a cylindrical mounting hole, the outer mold is fixed in the mounting hole and is fastened by radial locking bolts on the rotating mounting seat; a mounting socket is provided at the bottom of the mounting hole, the tail end of the core rod is inserted into the mounting socket and is fastened by radial locking bolts on the rotating mounting seat; the cutter is arranged axially along the rotating mounting seat and is fixed in the axial mounting groove, or the cutter is arranged radially along the rotating mounting seat and is fixed in the radial mounting groove.

[0010] As an improvement, the expansion module further includes an air blowing pipe arranged side by side with the step-by-step expansion punch, and the outer diameter of the air blowing pipe is smaller than the inner diameter of the capillary copper tube.

[0011] As an improvement, the expansion module is fixed on a planar motion platform, and the planar motion platform can perform horizontal motion in left-right and front-back directions.

[0012] As another further improvement, the straightening mechanism includes at least two groups of straightening roller groups, the straightening roller groups include two rows of straightening rollers arranged on the same plane, the two rows of straightening rollers are staggered along both sides of the capillary copper tube; the two groups of straightening roller groups are staggered at 90° along the circumference of the capillary copper tube; the spacing between the two rows of straightening rollers is adjustable.

[0013] As an improvement, the travel drive mechanism includes a fixed clamp and a movable clamp that can move away from and approach the fixed clamp along the travel direction of the capillary copper tube; the movable clamp clamps and pulls the capillary copper tube when approaching the fixed clamp, and the movable clamp releases the capillary copper tube and is clamped by the fixed clamp when moving away from the fixed clamp.

[0014] As an improvement, it also includes a guide column arranged along the direction of travel of the capillary copper tube, and a slider that can slide back and forth along the guide column; the movable clamp is installed on the slider; it also includes a lead screw arranged parallel to the guide column, the lead screw is threaded with the slider and drives the slider to move along the guide column by rotation.

[0015] As an improvement, a dynamic guide sleeve is arranged between the fixed clamp and the movable clamp; the dynamic guide sleeve can slide along the guide column, and a sliding rod parallel to the guide column is arranged on the side facing the movable clamp, the sliding rod passes through the through hole on the slider, and an enlarged portion is arranged at the tail end of the sliding rod, and the diameter of the enlarged portion is larger than the through hole, so that when the slider slides to the enlarged portion of the sliding rod, the dynamic guide sleeve can be pulled to move.

[0016] The present invention is beneficial in that:

[0017] The capillary copper tube expansion forming machine with the above structure straightens the coiled tube through the straightening mechanism and then expands and peels the end of the capillary copper tube step by step through the expansion forming mechanism.

[0018] In order to avoid the pipe rupture caused by too much expansion at one time, the present invention achieves the expansion requirement by expanding step by step, and uses an external mold to sizing during the last expansion so that the outer diameter after expansion meets the requirement. At the same time, the end after expansion is peeled and corrected by a cutter so that the expansion edge is neat and meets the product quality requirements.

[0019] After the expansion is formed, the capillary copper tube is cut into a suitable length by a cutting mechanism, thereby achieving the purpose of one-time automatic forming.

[0020] In the present invention, the three processes of straightening, forming and cutting are integrated into one process, thereby improving production efficiency and shortening the process production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the limiting ring and flaring of the capillary copper tube.

[0022] Figure 2 It is a structural schematic diagram of the present invention.

[0023] Figure 3 It is a schematic diagram of the expansion forming mechanism.

[0024] Figure 4 Schematic diagram of the rotary cutting and expanding punch.

[0025] Figure 5 Schematic diagram of another rotary cutting and expanding punch.

[0026] Figure 6 Schematic diagram of the straightening mechanism.

[0027] Figure 7 Schematic diagram of the travel drive mechanism.

[0028] Figure 8 Schematic diagram of the cutting mechanism.

[0029] Markings in the figure:

[0030] 2 straightening mechanism, 3 travel driving mechanism, 4 expansion forming mechanism, 5 cutting mechanism;

[0031] 21 straightening roller, 22 adjusting bolt;

[0032] 31 fixed clamping die, 32 movable clamping die, 33 lead screw, 34 guide column, 35 movable guide sleeve, 36 sliding rod, 361 expansion part;

[0033] 41 forming clamping die, 42 rotary cutting and expanding punch, 43 step-by-step expanding punch, 44 air blowing pipe, 45 receiving tray, 421 rotating mounting seat, 422 outer die, 423 core rod, 424 cutting knife, 425 locking bolt, 426 locking bolt;

[0034] 51 electric saw, 52 clamping block;

[0035] 200 flaring part. DETAILED DESCRIPTION

[0036] 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.

[0037] Prior art Chinese patent application CN202310180942.1 discloses a cutting and reducing machine and a processing method thereof, comprising a frame, and a straightening mechanism, a feeding mechanism, a cutting mechanism, a pipe end forming mechanism and a material receiving mechanism arranged on the frame in sequence; the frame is provided with two-way straightening mechanism, a feeding mechanism, a cutting mechanism, a pipe end forming mechanism and a material receiving mechanism, the two-way mechanism runs unilaterally or simultaneously, and both are connected to a PLC control system.

[0038] The above-mentioned prior art is also proposed by the applicant, which does not disclose the specific structures of the straightening mechanism, feeding mechanism, cutting mechanism, tube end forming mechanism, etc.

[0039] like Figure 1 As shown, the expanded portion 200 formed on the capillary copper tube is used for connection with the condenser.

[0040] In order to expand the capillary copper tube, Figure 2 As shown, the present invention provides a capillary copper tube expansion forming machine, comprising a straightening mechanism 2, a cutting mechanism 5, and an expansion forming mechanism 4 arranged in sequence from front to back; a travel driving mechanism 3 for driving the capillary copper tube to travel is arranged between the straightening mechanism 2 and the cutting mechanism 5;

[0041] like Figure 3 , Figure 4 , Figure 5As shown, the expansion forming mechanism 4 includes a forming clamp 41 for clamping and fixing the capillary copper tube and a expansion module for expanding the capillary copper tube; the expansion module includes a step-by-step expansion punch 43 and a rotary expansion punch 42 arranged side by side; the step-by-step expansion punch 43 is a plurality of step-by-step expansion punches 43, and the diameter of the working part for expanding the capillary copper tube on the step-by-step expansion punch 43 increases gradually; the rotary expansion punch 42 includes a concentrically arranged outer die 422 and a core rod 423; the outer die 422 and the core rod 423 are fixed on a rotating mounting seat 421 and can rotate along the axis with the rotating mounting seat 421; and also includes a cutter 424 fixed on the rotating mounting seat 421, and the cutter 424 can rotate with the rotating mounting seat 421, so that the capillary copper tube is expanded by the outer die 422 and the core rod 423, and the end of the capillary copper tube is cut by the cutter 424.

[0042] The principle of the present invention is that the coil is straightened by the straightening mechanism 2 and then expanded at the end of the capillary copper tube by the expansion molding mechanism 4. In order to avoid the pipe rupture caused by too much expansion at one time, the expansion requirement is achieved by step-by-step expansion in the present invention, and when the last expansion is performed, the outer mold is used for sizing so that the outer diameter after expansion meets the requirement. At the same time, the end after expansion is corrected by rotary cutting by a cutter so that the expansion edge is neat and meets the product quality requirements.

[0043] After the expansion, the capillary copper tube is cut into a suitable length by the cutting mechanism 5, thereby achieving the purpose of one-time automatic forming. In the present invention, the three processes of straightening, forming and cutting are integrated into one process, which improves the production efficiency and shortens the process production line.

[0044] like Figure 3 As shown, in this embodiment, the step-by-step expanding punch 43 includes a fixed seat and a punch body detachably mounted on the fixed seat, and the punch body includes a rod-shaped working part, and the front end of the working part is a tip. The number of the step-by-step expanding punches 43 can be determined according to the difference between the expansion size and the original capillary copper tube. The larger the difference, the more step-by-step expanding punches can be set. In this embodiment, only one step-by-step expanding punch 43 is selected, and its diameter is also increasing like the core rod 423 of the rotary cutting expanding punch 42. Of course, when processing other products with a larger expansion ratio, more step-by-step expanding punches can also be selected, and the diameters of multiple step-by-step expanding punches 43 are increasing. The core rod 423 has the largest diameter, and is also in an increasing relationship with the step-by-step expanding punch 43 with the largest diameter, thereby achieving the purpose of step-by-step expanding.

[0045] The outer mold 422 includes a cylindrical inner hole, and the core rod 423 is installed in the inner hole and is concentric with the outer mold 422; the cutting edge of the cutter 424 is arranged on the circumference outside the annular surface of the core rod 423; the core rod 423 is rod-shaped, and its front end is a pointed tip. In the expansion molding process, it is necessary not only to ensure that the expansion inner diameter meets the requirements, but also to control the outer diameter. In the present invention, the outer diameter is controlled by the outer mold and the inner diameter is controlled by the core rod, so as to meet the processing requirements. In addition, the outer mold 422 can also avoid the capillary copper tube from breaking when the expansion is maximum (the diameter of the core rod 423 is the largest). Since the rotating mounting seat 421 rotates at high speed, the outer mold 422, the core rod 423, and the cutter 424 fixed on the rotating mounting seat 421 also rotate at high speed, so the cutter can perform rotational cutting on the end of the capillary copper tube after expansion, so that the product has a flat end.

[0046] like Figure 4 As shown, more specifically, the rotating mounting seat 421 includes a cylindrical mounting hole, the outer mold 422 is fixed in the mounting hole and is fastened by a radial locking bolt 425 on the rotating mounting seat 421; a mounting socket is provided at the bottom of the mounting hole, the tail end of the core rod 423 (the tail end may be a square column matched with the mounting socket for anti-rotation) is inserted into the mounting socket and is fastened by a radial locking bolt 426 on the rotating mounting seat 421; the cutter 424 is arranged axially along the rotating mounting seat 421 and fixed in the axial mounting groove, or, as Figure 5 As shown, the cutter 424 is radially arranged along the rotating mounting seat 421 and fixed in the radial mounting groove. After being arranged in this way, the outer mold 422, the core rod 423, and the cutter 424 are all convenient to replace and are used to deal with products of different specifications.

[0047] In addition, the expansion module also includes a blow pipe 44 arranged side by side with the step-by-step expansion punch 43, and the outer diameter of the blow pipe 44 is smaller than the inner diameter of the capillary copper tube. The blow pipe 44 is connected to an air source such as an air compressor to purge the inside of the capillary copper tube before expansion to clean the residual oil and copper chips inside.

[0048] Since the capillary copper tube only moves axially during the entire processing process, in order to allow each station of the expansion module to process the capillary copper tube, the expansion module is fixed on a planar motion platform (not shown in the figure), and the planar motion platform can make horizontal movements in the left and right and front and back directions. In addition, in order to facilitate material unloading, the expansion module also includes a receiving tray 45 arranged side by side with the rotary expansion punch 42, and the receiving tray 45 can be driven by a cylinder to flip. The air blowing pipe 44, the step-by-step expansion punch 43, the rotary expansion punch 42, and the receiving tray 45 are arranged side by side in sequence. When working, the air blowing pipe 44 first moves forward under the drive of the planar motion platform to insert the end of the capillary copper tube to purge it. After the purge is completed, the air blowing pipe 44 is withdrawn from the capillary copper tube, and then the entire expansion module is driven to translate so that the step-by-step expansion punch 43 is directly opposite to the capillary copper tube. The step-by-step expanding punch 43 moves forward under the drive of the plane motion platform and inserts into the end of the capillary copper tube to expand it. After the expansion is completed, the step-by-step expanding punch 43 is withdrawn from the capillary copper tube. The rotary cutting expanding punch 42 works in the same way, which will not be described here.

[0049] The forming clamp 41 in the present invention includes two left and right clamping blocks, which clamp the capillary copper tube in the expansion process by means of left and right clamping. The purpose of selecting left and right clamping is that after the expansion is completed, the cutting mechanism 5 cuts off the capillary copper tube, and the left and right clamping blocks are separated so that the capillary copper tube after processing naturally falls onto the receiving tray 45. The receiving tray 45 is turned over by the cylinder drive to dump the capillary copper tube into the material frame.

[0050] like Figure 6 As shown, the straightening mechanism 2 in the present invention includes at least two groups of straightening roller groups, and the straightening roller groups include two rows of straightening rollers 21 arranged on the same plane, and the two rows of straightening rollers 21 are staggered along the two sides of the capillary copper tube; the two groups of straightening roller groups are staggered at 90 degrees along the circumference of the capillary copper tube. For example, the straightening roller groups located in the front are all arranged along the vertical surface, so as to straighten the capillary copper tube in the vertical direction. The straightening roller groups located in the rear are all arranged along the horizontal plane, so as to straighten the capillary copper tube in the horizontal direction. Through the straightening in the vertical and horizontal directions, the copper tube is transformed from a coil into a straight tube. Of course, in order to improve the straightening effect, the straightening roller groups can also be arranged into multiple groups.

[0051] In addition, in order to adapt to capillary copper tubes of different diameters, the spacing between two rows of straightening rollers in the same straightening roller set can be adjusted. Specifically, the straightening roller 21 can be set on a support frame, and the support frame is connected to an adjusting bolt 22. Bearings are set at both ends of the rotating shaft of the straightening roller 21, and the bearings are installed on a bearing seat. The bearing seat is floatingly installed on the support frame, and a preload spring is set between the bearing seat and the support frame. The tightening direction of the adjusting bolt 22 on the bearing seat is opposite to the preload force of the spring, so that the position of the straightening roller 21 can be adjusted.

[0052] like Figure 7 As shown, the travel drive mechanism 3 in the present invention includes a fixed clamp 31 and a movable clamp 32 that can move away from and approach the fixed clamp 31 along the travel direction of the capillary copper tube. In this embodiment, the movable clamp 32 is arranged in front of the fixed clamp 31; the movable clamp 32 clamps and pulls the capillary copper tube in the process of approaching the fixed clamp 31, and the movable clamp 32 releases the capillary copper tube in the process of moving away from the fixed clamp 31 and the capillary copper tube is clamped by the fixed clamp 31. In the process of the movable clamp 32 approaching the fixed clamp 31, only the movable clamp 32 clamps the capillary copper tube. This action realizes the pulling of the capillary copper tube, thereby providing power for the travel of the capillary copper tube. In the process of the movable clamp 32 moving away from the fixed clamp 31, the fixed clamp 31 clamps the capillary copper tube to prevent the capillary copper tube from retreating.

[0053] Specifically, the present embodiment further includes a guide post 34 arranged along the travel direction of the capillary copper tube, and a slider that can slide forward and backward along the guide post 34; the movable clamp 32 is mounted on the slider; and further includes a lead screw 33 arranged parallel to the guide post 34, the lead screw 33 is threadedly engaged with the slider and rotates to drive the slider to move along the guide post 34. The lead screw 33 can be driven by a motor or the like, so as to accurately control the movement of the movable clamp.

[0054] When the movable clamp 32 retreats to the position farthest from the fixed clamp 31, the distance between the two is large. Since the capillary copper tube itself has a certain weight, the capillary copper tube is easy to fall under the action of gravity, so that when the capillary copper tube is pulled, the force direction is inconsistent, resulting in the bending of the copper tube. In order to solve this problem, a dynamic guide sleeve 35 is provided between the fixed clamp 31 and the movable clamp 32 in the present invention; the dynamic guide sleeve 35 can move back and forth between the fixed clamp and the movable clamp, and its purpose is to support the capillary copper tube between the fixed clamp 31 and the movable clamp 32. The distance between the fixed clamp 31 and the movable clamp 32 changes dynamically. If the position of the guide sleeve does not change, it can only be set at a position close to the fixed clamp 31, which cannot play the role of supporting the capillary copper tube. If the position is far away from the fixed clamp 31, it will interfere with the operation of the movable clamp 32.

[0055] In order to solve this problem, a dynamic guide sleeve 35 is provided in the present invention, and the dynamic guide sleeve 35 can slide along the guide column 34. A sliding rod 36 parallel to the guide column 34 is provided on the side facing the movable clamp 32. The sliding rod 36 passes through the through hole on the slider, and an enlarged portion 361 is provided at the tail end of the sliding rod 36. The diameter of the enlarged portion 361 is larger than the through hole, so that when the slider slides to the enlarged portion 361 of the sliding rod 36, the dynamic guide sleeve 35 can be pulled to move.

[0056] After such arrangement, when the movable clamp 32 approaches the fixed clamp 31, the movable guide sleeve 35 is driven to move toward the fixed clamp 61, and no interference is caused to the movement of the movable clamp 32. When the movable clamp 32 moves away from the fixed clamp 31, the movable guide sleeve 35 can be pulled by the slide bar 36, so that the position of the movable guide sleeve 5 is located at a relatively middle position between the fixed clamp 31 and the movable clamp 32 (the specific position can be adjusted by the length of the slide bar 36), thereby achieving a better supporting effect.

[0057] like Figure 7 As shown, the cutting mechanism 5 in the present invention includes a clamping block 52 for clamping the capillary copper tube and an electric saw 51 for cutting the capillary copper tube; the clamping blocks are grouped into two oppositely arranged blocks, and two front and rear groups are arranged; a gap is left between the two groups of clamping blocks 52 for the electric saw to pass through; and a slide rail is also included, and the electric saw 51 is arranged on the slide rail and can move along the slide rail.

[0058] In this embodiment, the same group of clamping blocks 52 are arranged in the up and down directions to clamp the capillary copper tube in the up and down directions. After the electric saw cuts the capillary copper tube, the clamping block below can support the capillary copper tube so that the capillary copper tube at the rear can push the capillary copper tube cut at the front onto the receiving tray.

[0059] 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, and 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 expansion forming machine, characterized in that: It includes a straightening mechanism, a cutting mechanism, and a flaring and forming mechanism which are arranged in sequence from front to back; a travel driving mechanism for driving the capillary copper tube to travel is arranged between the straightening mechanism and the cutting mechanism; The expansion forming mechanism includes a forming clamp for clamping and fixing the capillary copper tube and an expansion module for expanding the capillary copper tube; the expansion module includes a step-by-step expansion punch and a rotary expansion punch arranged side by side; the step-by-step expansion punches are multiple, and the diameter of the working part of the step-by-step expansion punches used for expanding the capillary copper tube increases gradually; the rotary expansion punch includes a concentrically arranged outer die and a core rod; the outer die and the core rod are fixed on a rotating mounting seat and can rotate along the axis with the rotating mounting seat; it also includes a cutter fixed on the rotating mounting seat, and the cutter can rotate with the rotating mounting seat, so that the capillary copper tube is expanded by the outer die and the core rod, and the end of the capillary copper tube is cut by the cutter.

2. A capillary copper tube expansion forming machine according to claim 1, characterized in that: The step-by-step expanding punch comprises a fixing seat and a punch body detachably mounted on the fixing seat. The punch body comprises a rod-shaped working portion, and the front end of the working portion is a pointed end.

3. The capillary copper tube expansion forming machine according to claim 1, characterized in that: The outer die comprises a cylindrical inner hole, the core rod is installed in the inner hole and is arranged concentrically with the outer die; the cutting edge of the cutter is arranged on the circumference outside the annular surface of the core rod; the core rod is rod-shaped, and its front end is a pointed tip.

4. The capillary copper tube expansion forming machine according to claim 1, characterized in that: The rotating mounting seat includes a cylindrical mounting hole, the outer mold is fixed in the mounting hole and is fastened by radial locking bolts on the rotating mounting seat; a mounting socket is provided at the bottom of the mounting hole, the tail end of the core rod is inserted into the mounting socket and is fastened by radial locking bolts on the rotating mounting seat; the cutter is arranged axially along the rotating mounting seat and is fixed in the axial mounting groove, or the cutter is arranged radially along the rotating mounting seat and is fixed in the radial mounting groove.

5. The capillary copper tube expansion forming machine according to claim 1, characterized in that: The expansion module also includes an air blowing pipe arranged side by side with the step-by-step expansion punch, and the outer diameter of the air blowing pipe is smaller than the inner diameter of the capillary copper tube.

6. The capillary copper tube expansion forming machine according to claim 1, characterized in that: The expansion module is fixed on a planar motion platform, and the planar motion platform can perform horizontal motion in left-right and front-back directions.

7. The capillary copper tube expansion forming machine according to claim 1, characterized in that: The straightening mechanism includes at least two groups of straightening rollers, which include two rows of straightening rollers arranged on the same plane, and the two rows of straightening rollers are staggered along both sides of the capillary copper tube; the two groups of straightening rollers are staggered at 90 degrees along the circumference of the capillary copper tube.

8. The capillary copper tube expansion forming machine according to claim 1, characterized in that: The travel driving mechanism includes a fixed clamp and a movable clamp that can move away from and approach the fixed clamp along the travel direction of the capillary copper tube; the movable clamp clamps and pulls the capillary copper tube when approaching the fixed clamp, and releases the capillary copper tube when moving away from the fixed clamp and the fixed clamp clamps the capillary copper tube.

9. The capillary copper tube expansion forming machine according to claim 8, characterized in that: It also includes a guide column arranged along the travel direction of the capillary copper tube, and a slider that can slide back and forth along the guide column; the movable clamp is installed on the slider; it also includes a lead screw arranged parallel to the guide column, the lead screw is threaded with the slider and drives the slider to move along the guide column by rotation.

10. The capillary copper tube expansion forming machine according to claim 9, characterized in that: A dynamic guide sleeve is arranged between the fixed clamp and the movable clamp; the dynamic guide sleeve can slide along the guide column, and a sliding rod parallel to the guide column is arranged on the side facing the movable clamp, the sliding rod passes through the through hole on the slider, and an enlarged part is arranged at the tail end of the sliding rod, and the diameter of the enlarged part is larger than the through hole, so that when the slider slides to the enlarged part of the sliding rod, the dynamic guide sleeve can be pulled to move.

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