Positioning flanging mechanism of four-way valve pipe flanging machine

Abstract

The utility model belongs to the technical field of four-way valve pipe flanging equipment, particularly relates to a positioning flanging mechanism of a four-way valve pipe flanging machine, and solves the problems of low mechanization degree and low processing efficiency. The positioning and flanging mechanism of the four-way valve pipe flanging machine comprises a machine frame, and a positioning material carrying table, a short pore flanging table and a D hole flanging table are arranged on the machine frame. A rotary positioning structure is arranged between the positioning material carrying table and the rack and is used for circumferentially rotating the four-way valve pipe to adjust the hole E, the hole S and the hole C to be upward; a short pore flanging structure is arranged between the short pore flanging table and the rack and used for flanging short pores in the two ends of the four-way valve pipe outwards. A D hole flanging structure is arranged between the D hole flanging table and the rack; the rack is further provided with a transferring structure used for transferring the four-way valve pipe to the positioning material carrying table, the short pore flanging table and the D hole flanging table in sequence. And assembly line type machining of positioning, short pore flanging, D hole flanging and discharging is achieved, and the machining efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of four-way valve pipe flanging equipment, in particular to a positioning flanging mechanism of a four-way valve pipe flanging machine. Background Art

[0002] A four-way valve is a control valve with four oil ports, which is widely used in refrigeration equipment. Its main body is generally a cylindrical four-way valve tube. There are three holes E, S, and C on one side of the four-way valve tube, and a D hole on the other side. There is also a short pore outside the three holes. In order to meet the corresponding docking requirements, the D hole and the short pore need to be flanging outward.

[0003] However, most of the four-way valve tube flanging machines currently available are unable to achieve assembly line automated processing of positioning, short pore flanging, D-hole flanging, and discharging, and most still require manual participation, which undoubtedly increases labor costs and reduces processing efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems in the prior art and to propose a positioning flanging mechanism for a four-way valve pipe flanging machine.

[0005] In order to achieve the purpose of innovation of this utility model, the following technical solutions can be used:

[0006] A positioning and flanging mechanism of a four-way valve tube flanging machine comprises a frame, on which a positioning loading platform, a short-hole flanging platform and a D-hole flanging platform are provided; a rotating positioning structure is provided between the positioning loading platform and the frame, for circumferentially rotating the four-way valve tube to adjust the E, S and C holes to face upwards; a short-hole flanging structure is provided between the short-hole flanging platform and the frame, for flanging the short holes at both ends of the four-way valve tube outwards; a D-hole flanging structure is provided between the D-hole flanging platform and the frame; a transferring structure is also provided on the frame, for transferring the four-way valve tube to the positioning loading platform, the short-hole flanging platform and the D-hole flanging platform in sequence.

[0007] The positioning and flanging mechanism of the present invention is mainly used for adjusting the circumferential angle of the four-way valve tube to a state where three holes are facing upwards, and performing outward flanging operations on the short holes and D holes of the four-way valve tube, wherein the rotation positioning is performed on the positioning loading platform, and the four-way valve tube is rotated to a preset angle by the rotation positioning structure to ensure smooth docking and cooperation with the subsequent processing structure, the short hole flanging processing is performed on the short hole flanging platform, and the short hole flanging structure specifically realizes the flanging processing from the inside to the outside, the D hole flanging is performed on the D hole flanging platform, and the D hole flanging structure performs flanging processing on the D hole of the four-way valve tube from the inside to the outside, and the loading structure is used to realize sequential displacement of the four-way valve tube at each processing station. Of course, the front and rear positions of the short hole flanging platform and the D hole flanging platform can be interchanged. In order to ensure stable load-bearing, corresponding grooves are provided on the positioning loading platform, the short hole flanging platform and the D hole flanging platform.

[0008] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, the rotation positioning structure includes a tube body rotation assembly and a limit rod located above the positioning loading platform. A limit rod lifting assembly is provided between the limit rod and the frame. The positioning head at the lower end of the limit rod slides or rolls on the outer wall of the four-way valve tube. The position of the positioning head corresponds to at least one of the three holes, and the outer diameter is between the aperture of the D hole and the aperture of the three holes, and can be inserted into the hole to prevent rotation.

[0009] The limit rod is vertically liftable and arranged above the positioning loading platform. The limit rod lifting assembly is used to specifically drive the lifting action of the limit rod. The positioning head at the lower end of the limit rod is in contact with the outer wall of the four-way valve tube and has a tendency to move downward. The tube body rotation assembly is used to drive the circumferential rotation of the four-way valve tube. As the tube body rotates, the lower end of the limit rod rolls or slides on the tube wall. When the limit rod is opposite to one of the three holes, it is inserted into the hole, thereby limiting the continued rotation of the four-way valve tube, thereby achieving the effect of adjusting the four-way valve tube to three holes facing upward. The size of the positioning head is between the D hole and the three holes, that is, it will not be inserted into the D hole.

[0010] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, the limit rod lifting assembly includes a lifting cylinder whose cylinder body is fixed on the frame, the output end of the lifting cylinder is fixedly connected to the limit rod, and the positioning head includes a roller or a soft wear-resistant head; the tube body rotating assembly includes a rotating disk respectively located on the two axial sides of the positioning loading platform, and the rotating disk is rotatably connected to the inner side of the first clutch slide, and the first clutch slide is driven by the first clutch drive assembly to move close to or away from the four-way valve tube, which is used to make the rotating disk close to the end of the four-way valve tube for friction transmission, and the rotating disk is transmission-connected to the output end of the first motor.

[0011] The limit rod is connected to the output end of the lifting cylinder, and the extension and retraction of the limit rod is achieved by the extension and retraction of the output end of the lifting cylinder. A roller or a wear-resistant head is provided on the positioning head. The roller can roll in contact with the outer wall of the four-way valve tube, and the wear-resistant head can frictionally contact the outer wall of the four-way valve tube, thereby ensuring smooth relative rotation without scratching the tube wall. The tube body rotating assembly drives the four-way valve tube to rotate via a rotating disk. The rotating disk is provided on the first clutch slide and can be driven by the first clutch drive assembly to move closer to or away from the four-way valve tube. The rotating disk can also be provided with a docking groove or docking protrusion adapted to the diameter of the four-way valve tube to ensure stable docking. As the first clutch slide moves closer to the positioning loading platform, the rotating disk is pressed against the end of the four-way valve tube to achieve friction transmission. When moving away, the contact is released, ensuring that the four-way valve tube can smoothly enter and exit the positioning loading platform. The first motor specifically drives the rotation of the rotating disk to achieve the effect of rotating the four-way valve tube.

[0012] As an optimization, an elastic insertion component is provided between the positioning head and the limiting rod, and / or between the limiting rod and the output end of the lifting cylinder, so that the positioning head maintains a downward elastic tendency after contacting the outer wall of the four-way valve tube so as to be inserted when encountering three holes.

[0013] Specifically, the first clutch slide is slidably connected to the frame, the first clutch drive assembly includes a first clutch cylinder whose cylinder body is fixed to the frame or the first clutch slide, and the output end of the first clutch cylinder is connected to the first clutch slide or the frame.

[0014] In the positioning flanging mechanism of the above-mentioned four-way valve tube flanging machine, the short-hole flanging structure includes flanging columns located in the two axial directions of the four-way valve tube, and a small-hole flanging punch is vertically arranged on the upper side of the flanging column. The flanging column is arranged on the inner side of the second clutch slide, and the second clutch slide is slidably connected to the frame and is driven by the second clutch drive assembly to move closer to or away from the four-way valve tube. A downward pressure assembly is provided above the short-hole flanging table, and the short-hole flanging table is connected to the frame through an elastic telescopic assembly.

[0015] A small hole flanging punch is provided on the flanging column facing upward, and the flanging column is arranged on the second clutch slide and can be extended to insert into or move out of the four-way valve tube under the drive of the second clutch drive component. After the flanging column is extended and inserted into place, the small hole flanging punch is just located directly below the short hole. The downward pressure component is used to press the four-way valve tube downward. As the four-way valve tube continues to descend and translate, the small hole flanging punch penetrates the short hole upward to achieve the effect of flanging the short hole outward. The elastic telescopic component is used to ensure that the short hole flanging platform has a certain downward elastic retraction ability to ensure the downward pressure operation of the four-way valve tube by the downward pressure component.

[0016] Specifically, the second clutch slide is slidably connected to the frame, the second clutch drive assembly includes a second clutch cylinder whose cylinder body is fixed to the frame or the second clutch slide, and the output end of the second clutch cylinder is connected to the second clutch slide or the frame.

[0017] As an optimization, one or more punch needle mounting holes are provided on the upper side of the flanging column, and the small hole flanging punch needle can be detachably fixed in the punch needle mounting hole. The outer diameter of the flanging column is smaller than the inner diameter of the four-way valve tube, and can be inserted into the four-way valve tube and make the small hole flanging punch needle located below the flanging hole.

[0018] There are multiple punch needle mounting holes, and the appropriate installation position can be selected according to the specific distance between the short hole and the end of the four-way valve tube. The small hole flanging punch needle and the punch needle mounting hole are detachable and fixed, which is convenient for disassembly and adjustment.

[0019] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, the down-pressing assembly includes a down-pressing block slidably connected to the frame, the down-pressing block is connected to the output end of the down-pressing electric cylinder, and the bottom surface of the down-pressing block is provided with a docking groove adapted to the outer diameter of the four-way valve tube; a positioning column is vertically arranged on the down-pressing block, the positioning column is vertically opposite to at least one of the three holes, and a guide cone surface is provided at the lower end, and the guide cone surface is lower than the bottom of the docking groove.

[0020] The lower pressure block rises and falls under the drive of the lower pressure electric cylinder, and the docking groove at the bottom of the lowering block docks with the four-way valve tube to ensure stable downward pressure. The positioning column on the lower pressure block is used to make a certain circumferential angle adjustment in the process of the lower pressure block approaching the four-way valve tube to ensure that the small hole flanging punch needle and the short hole are accurately docked. The guide cone surface at the lower end of the positioning column is used to specifically contact the periphery of the three holes to move the four-way valve tube to the three holes facing upward.

[0021] As an optimization, at least one positioning column mounting groove is provided at the bottom of the lower pressure block, and the positioning column is fixed in the positioning column mounting groove. The maximum outer diameter of the guide cone surface is adapted to the inner diameter of the three holes of the four-way valve tube, and the distance between the lower end and the bottom of the docking groove is smaller than the diameter of the four-way valve tube.

[0022] Multiple positioning column mounting grooves can be set, but they all correspond to at least one of the three holes. The positioning column can be removably fixed in the positioning column mounting groove, and the disassembly and assembly are flexible. The lowest position of the guide cone surface does not exceed the lower inner wall of the four-way valve tube, which avoids the positioning column hitting the inner wall of the four-way valve tube and avoids unnecessary impact on the D hole.

[0023] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, the D-hole flanging structure includes a flanging punch arranged above the D-hole flanging table, and the flanging punch is arranged on the frame through a punch lifting assembly. The maximum outer diameter of the flanging punch is smaller than the inner diameter of the three holes, and the position corresponds vertically to the D hole. It can pass through the three holes to flanging the D hole. The frame is also provided with a demolding blocking assembly for vertically limiting the four-way valve tube, and the D-hole flanging table is provided with a clearance notch corresponding to the position of the flanging punch.

[0024] The flanging punch is driven to rise and fall by the punch lifting assembly. The flanging punch is used to be inserted into the D hole to realize outward flanging. Its outer diameter is smaller than the inner diameter of the three holes to ensure smooth cooperation between the three holes and the D hole. The demoulding blocking assembly is used to prevent the four-way valve tube from being driven upward by the flanging punch when the flanging punch completes the flanging and exits, ensuring that the flanging punch is withdrawn from the D hole. The clearance gap is used to make way for the downward flanging of the D hole.

[0025] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, the punch lifting assembly includes a lifting seat slidably connected to the frame, and at least two punch mounting holes are provided at the bottom of the lifting seat. The punch mounting holes are respectively opposite to the S hole and the E or C hole. The flanging punch is detachably fixed in the punch mounting hole, and the lifting seat is connected to the punch lifting cylinder. The demolding blocking assembly includes an L-shaped demolding block fixed to the frame, and the horizontal material blocking portion of the demolding block is located directly above the end of the four-way valve tube.

[0026] The lift seat slides vertically, and the output end of the punch lift cylinder is connected to the lift seat to drive its lifting motion. The base of the lift seat is equipped with multiple punch mounting holes, one of which is centered relative to the S hole, and another is offset relative to the E or C hole. This allows for machining four-way valve tubes with centered or offset D holes. The flanging punch and the punch mounting holes are removable and flexible. The demolding block is an inverted L-shaped block, with its transverse stop located above the end of the four-way valve tube. This prevents the four-way valve tube from rising synchronously with the flanging punch, ensuring smooth removal of the flanging punch. A clearance is provided between the transverse stop and the four-way valve tube to ensure that the transfer mechanism can transport the four-way valve tube to the D-hole flanging table.

[0027] As an optimization, the bottom of the transverse stopper is provided with a clearance groove for the short pores of the flanged edge. The width and position of the clearance groove are adapted to the short pores after the flanged edge. It is used to make way for the short pores of the flanged edge when the four-way valve tube contacts the bottom surface of the transverse stopper, thereby avoiding damage to the flanged edge.

[0028] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, the transfer structure includes at least two supporting plates respectively located below the two ends of the four-way valve tube, and at least 4 slots are evenly distributed axially on the top of the supporting plate. The material loading platform, positioning loading platform, short-hole flanging platform and D-hole flanging platform are evenly arranged along the axial direction of the supporting plate, and the spacing between each platform is adapted to the spacing between the slots. A lifting assembly and a transverse movement assembly are provided between the supporting plate and the frame.

[0029] The support plate is located on the lower side of both ends of the four-way valve tube. Driven by the lifting assembly and the transverse movement assembly, it can be raised and lowered, and moved transversely. It can lift the four-way valve tube and move it to the top of the next workstation, then lower it, achieving the effect of moving the four-way valve tube sequentially between each workstation. The slot is used to limit the specific position of the four-way valve tube to ensure the stability of the support and movement process. The support plate continues to move in a cycle of rising, transverse movement, lowering, and resetting. In each cycle, it can simultaneously support the four-way valve tube on each workstation to the next workstation, with high transfer efficiency. The material carrier is located at the end of the pre-inspection adjustment mechanism and is used to carry qualified four-way valve tubes that have completed pre-inspection and have their circumferential angle adjusted.

[0030] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, the transverse movement assembly includes a transfer slide connected to the frame in a horizontal sliding manner, and the transfer slide is connected to the output end of the horizontal transfer cylinder whose cylinder body is fixed to the frame;

[0031] The jacking assembly includes a jacking slide vertically connected to the transfer slide, the jacking slide is connected to the output end of the jacking cylinder whose cylinder body is fixed on the transfer slide, and the supporting plate is fixed on the jacking slide;

[0032] A magnetic attraction component is provided in the notch;

[0033] The tail end of the supporting plate is provided with a material cutting slope.

[0034] The traverse slide and horizontal transfer cylinder are used to implement the traverse motion, while the lift slide and lift cylinder are used to implement the lifting motion. A magnetic assembly installed on the notch ensures stable transfer of the four-way valve tube, preventing or minimizing unnecessary rotation of the tube during transportation. A discharge ramp is installed at the rear end of the carrier plate. When raised, this ramp corresponds to the bottom of the D-hole flanging table. It is used to remove the four-way valve tube from the groove of the D-hole flanging table and allow it to roll down the ramp for discharge. A corresponding finished product basket can be docked below this ramp.

[0035] In the positioning and flanging mechanism of the above-mentioned four-way valve tube flanging machine, a lubricating oil conveyor is also provided on the frame, and an oil supply port is provided on the first clutch slide of the short-hole flanging structure and the second clutch slide of the D-hole flanging structure. The lubricating oil conveyor is connected to the oil supply port through an oil pipe.

[0036] The lubricating oil conveyor is used to supply lubricating oil to the upper oil port to reduce running resistance and alleviate wear of parts. The upper oil port is connected to the relative sliding surfaces including but not limited to the first clutch slide and the second clutch slide.

[0037] As an optimization, the lubricating oil conveyor includes an oil storage tank and a pumping cylinder body arranged on the oil storage tank, a piston is slidably connected in the pumping cylinder body, an oil storage chamber is formed between the piston and the pumping cylinder body, an oil inlet interface and an oil outlet interface are connected to the oil storage chamber, the oil inlet interface is connected to the oil storage tank, and a one-way valve is provided on the oil inlet interface and the oil outlet interface. The piston is driven by the piston drive structure to move to compress or expand the oil storage chamber.

[0038] The lubricating oil conveyor achieves the effect of single quantitative pumping of oil through the reciprocating movement of the piston within a limited distance. The amount of oil delivered in a single time is the amount of oil in the oil storage chamber, which makes it easy to control the amount of oil pumped each time.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] 1. The positioning and flanging mechanism of the present invention is mainly used to adjust the circumferential angle of the four-way valve tube to a state where three holes are facing upwards, and to perform outward flanging operations on the short holes and D holes of the four-way valve tube. The rotational positioning rotates the four-way valve tube to a preset angle by the rotational positioning structure to ensure smooth docking and cooperation with the subsequent processing structure. The short hole flanging structure specifically realizes flanging processing from the inside to the outside, and the D hole flanging structure specifically realizes flanging processing from the inside to the outside of the D hole of the four-way valve tube. The transfer structure is used to realize sequential displacement of the four-way valve tube at each processing station, thereby realizing assembly-line flanging processing of the short holes and D holes of the four-way valve tube, with a high degree of mechanization.

[0041] 2. The limit rod is vertically liftable and arranged above the positioning loading platform. The tube body rotation assembly is used to drive the circumferential rotation of the four-way valve tube. When the limit rod is opposite to one of the three holes, it is inserted into the hole, thereby limiting the continued rotation of the four-way valve tube, thereby achieving the effect of adjusting the four-way valve tube to three holes facing upward.

[0042] 3. The flanging column is set on the second clutch slide and can be extended to insert or move out of the four-way valve tube. As the down-pressing component presses the four-way valve tube downward, the small hole flanging punch on the flanging column penetrates into the short hole upward to achieve the effect of flanging the short hole outward.

[0043] 4. A positioning column is provided at the bottom of the lower pressing block, which is used to make a certain circumferential angle adjustment when the lower pressing block approaches the four-way valve tube to ensure that the small hole flanging punch needle is accurately docked with the short hole.

[0044] 5. The flanging punch is driven by the punch lifting assembly to move up and down, and can be inserted into the D hole to achieve outward flanging. The demoulding blocking assembly is used to prevent the four-way valve tube from being driven upward by the flanging punch when the flanging punch completes the flanging and exits, ensuring that the flanging punch is withdrawn from the D hole.

[0045] 6. The supporting plate is located at the lower side of both ends of the four-way valve pipe and can be raised and lowered and moved horizontally. It can lift the four-way valve pipe and move it to the top of the next workstation and then put it down, so as to achieve the effect of moving the four-way valve pipe in sequence between the workstations. The supporting plate continues to move in a cycle of rising, moving horizontally, falling, and resetting. In each cycle, the four-way valve pipe on each workstation can be simultaneously supported and sent to the next workstation, with high transfer efficiency.

[0046] 7. The magnetic attraction component provided on the notch can ensure the stable transfer of the four-way valve tube, avoiding or reducing unnecessary rotation of the tube body during transportation.

[0047] 8. A material discharge slope is provided at the tail end of the support plate. When the slope rises, it corresponds to the bottom of the D-hole flanging table. It is used to separate the four-way valve tube from the groove of the D-hole flanging table and make it roll down with the slope to complete the discharge, with a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic diagram of the positioning flanging mechanism provided by the utility model being arranged on a four-way valve pipe flanging machine;

[0049] Figure 2 This is a structural diagram of the rotation positioning structure provided by the utility model;

[0050] Figure 3 This is a schematic structural diagram of the short pore flanging structure provided by the utility model;

[0051] Figure 4 yes Figure 3 A magnified view of the details at center A;

[0052] Figure 5 This is a structural diagram of the D-hole flanging structure provided by the utility model;

[0053] Figure 6 yes Figure 5 A magnified view of the detail at point B in the middle;

[0054] Figure 7 This is a schematic diagram of the cooperation between the lifting seat and the flanging punch provided by the utility model;

[0055] Figure 8 This is a schematic structural diagram of the cooperation between the demoulding blocking assembly and the D-hole flanging table provided by the present invention;

[0056] Figure 9 It is a structural diagram of the transfer structure provided by the utility model;

[0057] Figure 10 It is a main schematic view of the four-way valve pipe provided by the utility model.

[0058] In the figure, the frame 200, the four-way valve tube 201, the S hole 202, the D hole 203, the short hole 204, the material loading platform 23, the positioning loading platform 40, the short hole flanging platform 41, the D hole flanging platform 42, the rotation positioning structure 43, the short hole flanging structure 44, the D hole flanging structure 45, the transfer structure 46, the tube body rotation component 47, the limit rod 48, the limit rod lifting component 49, the lifting cylinder 50, the roller 51, the rotating disk 52, the first clutch slide 53, the first motor 54, the first clutch cylinder 55, the flanging column 56, the second clutch slide 57, the punching needle installation Mounting hole 58, small hole flanging punch needle 59, second clutch cylinder 60, pressing assembly 61, pressing block 62, pressing electric cylinder 63, positioning column 64, guide cone 65, flanging punch 66, demoulding blocking assembly 67, lifting seat 68, punch mounting hole 69, demoulding block 70, horizontal blocking part 71, flanging short hole makeshift groove 72, supporting plate 73, transfer slide 74, horizontal transfer cylinder 75, lifting slide 76, lifting cylinder 77, magnetic suction assembly 78, unloading slope 79, oiling port 80, makeshift gap 81, elastic telescopic assembly 82, notch 83. DETAILED DESCRIPTION

[0059] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0060] Specific implementation examples Figure 1-10 As shown, the positioning and flanging mechanism of the four-way valve tube flanging machine includes a frame 200, on which a positioning loading platform 40, a short-hole flanging platform 41 and a D-hole flanging platform 42 are provided; a rotating positioning structure 43 is provided between the positioning loading platform 40 and the frame 200, which is used to rotate the four-way valve tube 201 circumferentially to adjust the E, S and C holes to face upwards; a short-hole flanging structure 44 is provided between the short-hole flanging platform 41 and the frame 200, which is used to flanging the short holes 204 at both ends of the four-way valve tube 201 outwards; a D-hole flanging structure 45 is provided between the D-hole flanging platform 42 and the frame 200; a transferring structure 46 is also provided on the frame 200, which is used to transfer the four-way valve tube 201 to the positioning loading platform 40, the short-hole flanging platform 41 and the D-hole flanging platform 42 in sequence.

[0061] Specifically, the positioning and flanging mechanism of the present invention is mainly used to adjust the circumferential angle of the four-way valve tube to a state where the three holes are facing upwards, and to perform outward flanging operations on the short pores 204 and the D hole 203 of the four-way valve tube 201, wherein the rotation positioning is performed on the positioning loading platform 40, and the four-way valve tube is rotated to a preset angle by the rotation positioning structure 43 to ensure smooth docking with the subsequent processing structure, and the short pore flanging processing is performed on the short pore flanging platform 41, and the short pore flanging structure 4 Specifically, the flanging process is realized from inside to outside. The D-hole flanging is performed on the D-hole flanging table 42. The D-hole flanging structure 45 performs flanging process from inside to outside on the D-hole of the four-way valve tube. The transfer structure 46 is used to realize the sequential transfer of the four-way valve tube at each processing station. Of course, the front and rear positions of the short-hole flanging table 41 and the D-hole flanging table 42 can be interchanged. In order to ensure stable load, corresponding grooves are provided on the positioning loading table 40, the short-hole flanging table 41 and the D-hole flanging table 42.

[0062] like Figure 2 As shown, the rotation positioning structure 43 includes a tube body rotation assembly 47 and a limit rod 48 located above the positioning loading platform 40. A limit rod lifting assembly 49 is provided between the limit rod 48 and the frame 200. The positioning head at the lower end of the limit rod 48 rolls on the outer wall of the four-way valve tube. The position of the positioning head corresponds to the S hole 202, and the outer diameter is between the aperture of the D hole and the aperture of the S hole, and can be inserted into the S hole 202 to prevent rotation. The limit rod lifting assembly 49 includes a lifting cylinder 50 whose cylinder body is fixed on the frame 200, the output end of the lifting cylinder 50 is fixedly connected to the limit rod 48, and the positioning head includes a roller 51; the tube body rotating assembly 47 includes a rotating disk 52 located on the two axial sides of the positioning loading platform 40, and the rotating disk 52 is rotatably connected to the inner side of the first clutch slide 53. The first clutch slide 53 is driven by the first clutch drive assembly to move closer to or away from the four-way valve tube, and is used to make the rotating disk 52 close to the end of the four-way valve tube for friction transmission. The rotating disk 52 is transmission-connected to the output end of the first motor 54.

[0063] Specifically, a limit rod 48 is vertically and movably disposed above the positioning loading platform 40. A limit rod lifting assembly 49 is used to specifically drive the lifting and lowering of the limit rod 48. The positioning head at the lower end of the limit rod 48 contacts the outer wall of the four-way valve tube and has a tendency to move downward. The tube body rotation assembly 47 is used to drive the circumferential rotation of the four-way valve tube. As the tube body rotates, the lower end of the limit rod 48 rolls or slides on the tube wall. When the limit rod 48 is opposite the S hole 202, it is inserted into the hole, thereby restricting further rotation of the four-way valve tube and achieving the effect of adjusting the four-way valve tube to three holes facing upward. The positioning head is sized between the D hole and the S hole, that is, it will not insert into the D hole 203. The limit rod 48 is connected to the output end of the lifting cylinder 50. The extension and retraction of the limit rod 48 is achieved by the extension and retraction of the output end of the lifting cylinder 50. A roller 51 is provided on the positioning head. The roller 51 rolls in contact with the outer wall of the four-way valve tube and does not scratch the tube wall. The tube body rotating assembly 47 drives the four-way valve tube to rotate through the rotating disk 52. The rotating disk 52 is arranged on the first clutch slide 53, and can be driven by the first clutch driving assembly to move closer to or away from the four-way valve tube. The first clutch slide 53 is slidably connected to the frame 200. The first clutch driving assembly includes a first clutch cylinder 55 whose cylinder body is fixed on the frame 200. The output end of the first clutch cylinder 55 is connected to the first clutch slide 53 of the machine. A docking protrusion adapted to the pipe diameter of the four-way valve tube can also be provided on the rotating disk 52 to ensure the stability of the docking. As the first clutch slide 53 moves closer to the positioning loading platform 40, the rotating disk 52 is close to the end of the four-way valve tube to realize friction transmission. When it is away from the positioning loading platform 40, the contact is released, ensuring that the four-way valve tube can smoothly enter and exit the positioning loading platform 40. The first motor 54 specifically drives the rotation of the rotating disk 52 to achieve the effect of rotating the four-way valve tube.

[0064] As an optimization of this embodiment, an elastic insertion component is provided between the positioning head and the limiting rod 48, so that the positioning head maintains a downward elastic tendency after contacting the outer wall of the four-way valve tube so as to be inserted when encountering three holes.

[0065] like Figure 3 、 4As shown, the short hole flanging structure 44 includes a flanging column 56 located in the two axial directions of the four-way valve tube, and a small hole flanging punch 59 is vertically arranged on the upper side of the flanging column 56. The flanging column 56 is arranged on the inner side of the second clutch slide 57. The second clutch slide 57 is slidably connected to the frame 200 and is driven by the second clutch drive component to move closer to or away from the four-way valve tube. A downward pressure component 61 is provided above the short hole flanging platform 41. The short hole flanging platform 41 is connected to the frame 200 through an elastic telescopic component 82. The downward pressure component 61 includes a downward pressure block 62 slidably connected to the frame 200. The downward pressure block 62 is connected to the output end of the downward pressure electric cylinder 63. The bottom surface of the downward pressure block 62 is provided with a docking groove adapted to the outer diameter of the four-way valve tube; a positioning column 64 is vertically arranged on the downward pressure block 62. The positioning column 64 is vertically opposite to the S hole and has a guide cone 65 at the lower end. The guide cone 65 is lower than the bottom of the docking groove.

[0066] Specifically, a small hole flanging punch 59 pointing vertically upward is provided on the flanging column 56. The flanging column 56 is arranged on the second clutch slide 57 and can be extended to insert or move out of the four-way valve tube under the drive of the second clutch drive component. After the flanging column 56 is extended and inserted into place, the small hole flanging punch 59 is just located directly below the short hole. The downward pressure component 61 is used to press the four-way valve tube downward. As the four-way valve tube continues to descend and translate, the small hole flanging punch 59 penetrates the short hole upward to achieve the effect of flanging the short hole outward. The elastic telescopic component 82 is used to ensure that the short hole flanging platform 41 has a certain downward elastic retraction ability to ensure the downward pressure operation of the four-way valve tube by the downward pressure component 61. The lower pressing block 62 is driven by the lower pressing electric cylinder 63 to rise and fall, and the docking groove at the bottom of the lowering block is docked with the four-way valve tube to ensure stable downward pressure. The positioning column 64 on the lower pressing block 62 is used to make a certain circumferential angle adjustment in the process of the lower pressing block 62 approaching the four-way valve tube to ensure that the small hole flanging punch 59 is accurately docked with the short pore. The guide cone surface 65 at the lower end of the positioning column 64 is used to specifically contact the periphery of the three holes to move the four-way valve tube to the three holes facing upward.

[0067] In this embodiment, the second clutch slide 57 is slidably connected to the frame 200 , and the second clutch drive assembly includes a second clutch cylinder 60 whose cylinder body is fixed to the frame 200 , and the output end of the second clutch cylinder 60 is connected to the second clutch slide 57 .

[0068] As an optimization, multiple punch needle mounting holes 58 are provided on the upper side of the flanging column 56. Small hole flanging punch needles 59 are detachably fixed in the punch needle mounting holes 58. The outer diameter of the flanging column 56 is smaller than the inner diameter of the four-way valve tube, allowing it to be inserted into the four-way valve tube with the small hole flanging punch needles 59 located below the flanging holes. Multiple punch needle mounting holes 58 are provided, and the appropriate mounting position can be selected based on the specific spacing between the short pores and the end of the four-way valve tube. The small hole flanging punch needles 59 and the punch needle mounting holes 58 are detachably fixed, making them easy to disassemble and adjust.

[0069] As an optimization, two positioning column mounting grooves are provided at the bottom of the lower pressure block 62, and the positioning column 64 is fixed in the positioning column mounting groove. The maximum outer diameter of the guide cone 65 is adapted to the inner diameter of the S hole of the four-way valve tube, and the distance between the lower end and the bottom of the docking groove is less than the diameter of the four-way valve tube.

[0070] Specifically, there are multiple positioning column mounting grooves, but they all correspond to at least one of the three holes. The positioning column 64 can be removably fixed in the positioning column mounting groove, and is flexible to disassemble and assemble. The lowest position of the guide cone 65 does not exceed the lower inner wall of the four-way valve tube, which avoids the positioning column 64 hitting the inner wall of the four-way valve tube and avoids unnecessary impact on the D hole.

[0071] like Figure 5 、 6 As shown in Figures 7 and 8, the D-hole flanging structure 45 includes a flanging punch 66 arranged above the D-hole flanging platform 42. The flanging punch 66 is set on the frame 200 through a punch lifting assembly. The maximum outer diameter of the flanging punch 66 is smaller than the inner diameter of the three holes, and the position corresponds to the vertical direction of the D-hole. It can pass through the three holes to flanging the D-hole. A demolding blocking assembly 67 for vertically limiting the four-way valve tube is also provided on the frame 200. A clearance notch 81 corresponding to the position of the flanging punch 66 is provided on the D-hole flanging platform 42. The punch lifting assembly includes a lifting seat 68 slidably connected to the frame 200. Two punch mounting holes 69 are provided at the bottom of the lifting seat 68. The punch mounting holes 69 are respectively opposite to the S hole and the E or C hole. The flanging punch 66 is detachably fixed in the punch mounting hole 69. The lifting seat 68 is connected to the punch lifting cylinder 84. The demolding blocking assembly 67 includes an L-shaped demolding block 70 fixed to the frame 200. The horizontal material blocking portion 71 of the demolding block 70 is located directly above the end of the four-way valve tube.

[0072] Specifically, the flanging punch 66 is driven by the punch lifting assembly to move upward. The flanging punch 66 is inserted into the D hole to achieve outward flanging. Its outer diameter is smaller than the inner diameter of the three holes, ensuring smooth fit between the three holes and the D hole. The demolding blocking assembly 67 is used to prevent the four-way valve tube from being driven upward by the flanging punch 66 when the flanging punch 66 is withdrawn, ensuring that the flanging punch 66 is withdrawn from the D hole. The clearance notch 81 is used to make way for the downward flanging of the D hole. The lifting seat 68 can slide vertically. The output end of the punch lifting cylinder 84 is connected to the lifting seat 68 to drive the lifting movement of the lifting seat 68. The bottom of the lifting seat 68 is provided with multiple punch mounting holes 69, one of which is centered opposite the S hole, and the other is offset opposite the E or C hole. This can be used to process four-way valve tubes with centered or offset D holes. The flanging punch 66 and the punch mounting holes 69 are detachable and fixed, providing flexible disassembly. The demolding block 70 is in an inverted L-shape, and its horizontal stop portion 71 is located above the end of the four-way valve tube, which is used to prevent the four-way valve tube from rising synchronously with the rise of the flanging punch 66, ensuring the smooth exit of the flanging punch 66. Of course, a certain gap is provided between the horizontal stop portion 71 and the four-way valve tube to ensure that the transfer structure 46 supports the four-way valve tube to the D-hole flanging table 42.

[0073] As an optimization of this embodiment, a flanged short hole clearance groove 72 is provided at the bottom of the transverse stopper 71. The width and position of the flanged short hole clearance groove 72 are adapted to the short holes after the flange is formed. This groove is used to make way for the flanged short holes when the four-way valve tube contacts the bottom surface of the transverse stopper 71, thereby avoiding damage to the flange.

[0074] like Figure 9 As shown, the transfer structure 46 includes two supporting plates 73 respectively located under the two ends of the four-way valve tube, and four notches 83 are evenly distributed axially on the top of the supporting plate 73. The material loading platform 23, the positioning loading platform 40, the short hole flanging platform 41 and the D hole flanging platform 42 are evenly arranged along the axial direction of the supporting plate 73, and the spacing between each platform is adapted to the spacing between the notches 83. A lifting assembly and a transverse movement assembly are provided between the supporting plate 73 and the frame 200.

[0075] Specifically, the support plate 73 is located on the lower side of both ends of the four-way valve tube. Driven by the lifting assembly and the transverse movement assembly, it can be raised and lowered, and laterally moved. It can lift the four-way valve tube and move it to the top of the next workstation, then lower it, achieving the effect of moving the four-way valve tube sequentially between the workstations. The notch 83 is used to specifically limit the position of the four-way valve tube, ensuring the stability of the support and movement process. The support plate 73 continues to operate in a cycle of rising, transverse movement, lowering, and resetting. In each cycle, it can simultaneously support the four-way valve tube on each workstation to the next workstation, achieving high transfer efficiency. The waiting platform 23 is located at the end of the pre-inspection adjustment mechanism and is used to carry qualified four-way valve tubes that have completed pre-inspection and have their circumferential angle adjusted.

[0076] As a specific optimization, the transverse movement component includes a transfer slide 74 horizontally slidably connected to the frame 200, and the transfer slide 74 is connected to the output end of the horizontal transfer cylinder 75 whose cylinder body is fixed on the frame 200; the lifting component includes a lifting slide 76 vertically slidably connected to the transfer slide 74, and the lifting slide 76 is connected to the output end of the lifting cylinder 77 whose cylinder body is fixed on the transfer slide 74, and the supporting plate 73 is fixed on the lifting slide 76; a magnetic suction component 78 is provided in the slot 83; and a cutting slope 79 is provided at the tail end of the supporting plate 73.

[0077] Specifically, the traverse slide and horizontal transfer cylinder 75 are used to implement the traverse movement, while the lift slide 76 and lift cylinder 77 are used to implement the lifting movement. A magnetic assembly 78 is provided on the notch 83 to ensure stable transfer of the four-way valve tube, avoiding or reducing unnecessary rotation of the tube during transportation. A discharge ramp 79 is provided at the rear end of the support plate 73. When raised, this discharge ramp 79 corresponds to the bottom of the D-hole flanging table 42. It is used to remove the four-way valve tube from the groove of the D-hole flanging table 42 and allow it to roll down the ramp to complete the discharge. A corresponding finished product basket can be docked below this bottom.

[0078] As a further optimization, a lubricating oil conveyor is also provided on the frame 200. An upper oil port 80 is provided on the first clutch slide 53 of the short-pore flanging structure 44 and the second clutch slide 57 of the D-hole flanging structure 45. The lubricating oil conveyor is connected to the upper oil port 80 via an oil delivery pipe. The lubricating oil conveyor includes an oil storage tank and a pumping cylinder body provided on the oil storage tank. A piston is slidably connected to the pumping cylinder body. An oil storage chamber is formed between the piston and the pumping cylinder body. The oil storage chamber is connected to an oil inlet interface and an oil outlet interface. The oil inlet interface and the oil outlet interface are provided with a one-way valve. The oil inlet interface is connected to the oil storage tank, and the outlet interface is connected to the upstream port via an oil outlet pipe. The piston is driven by the piston drive structure to move to compress or expand the oil storage chamber.

[0079] Specifically, the lubricating oil delivery device is used to supply lubricating oil to the upper oil port 80, reducing operating resistance and alleviating component wear. The upper oil port 80 is connected to the relative sliding surfaces of, but not limited to, the first clutch slide 53 and the second clutch slide 57. The lubricating oil delivery device achieves a single, quantitative delivery of oil through the reciprocating motion of a piston within a limited distance. The amount of oil delivered in a single delivery is the amount of oil in the oil storage chamber, making it easy to control the amount of oil delivered each time, ensuring lubrication while reducing excessive lubricating oil loss.

[0080] Specific working principle: After the pre-inspection is completed and the circumferential angle is adjusted, the qualified four-way valve tube 201 is placed on the waiting platform 23 to wait for material collection. After the processing of the four-way valve tube 201 on each workstation is completed, the conveying plate 73 rises, moves horizontally, and descends to transfer the four-way valve tube 201 to the next workstation, and moves horizontally in the opposite direction to reset after the transfer is completed.

[0081] The four-way valve tube 201 on the material-waiting platform 23 is placed on the positioning platform 40, and the first clutch slide 53 moves inward until the rotating disk 52 abuts against the end of the four-way valve tube 201. At the same time, the limit rod 48 descends until the roller 51 and the wall of the four-way valve tube are in rolling contact. Then the rotating disk 52 starts to rotate, and the roller 51 rolls on the tube wall until it encounters the S hole 202. The limit rod 48 is inserted into the S hole 202 to limit the further rotation of the four-way valve tube 201. The rotating disk 52 stops rotating, and the first clutch slide 53 moves in the opposite direction to release the contact with the four-way valve tube 201, and the posture adjustment is completed.

[0082] Afterwards, the four-way valve tube 201 is transferred to the short hole flanging table 41 by the supporting plate 73, the second clutch slide 57 closes and slides, the flanging column 56 is inserted into the four-way valve tube 201, the lower pressure block 62 moves downward, and the positioning column 64 is inserted into the S hole 202. During the insertion process, its guide cone surface 65 drives the four-way valve tube 201 to rotate until the three holes are facing upward, and the lower pressure block 62 continues to descend to press the four-way valve tube 201 downward, and the small hole flanging punch 59 penetrates the short hole 204 to complete the flanging, and then the lower pressure block 62 reverses, and the elastic telescopic component 82 pushes the four-way valve tube 201 upward to demold the small hole flanging punch 59, and the second clutch slide 57 reverses, and the flanging column 56 withdraws.

[0083] Afterwards, the four-way valve tube 201 is transferred by the supporting plate 73 to the D-hole flanging table 42, and the flanging punch 66 descends and passes through the S-hole 202 to flanging the D-hole 203 outward. After the flanging is completed, the flanging punch 66 rises, and the four-way valve tube 201 is blocked by the horizontal stop part 71 and cannot move upward, and the flanging punch 66 is demolded.

[0084] Finally, the four-way valve tube 201 is lifted up by the unloading inclined surface 79 of the supporting plate 73 and rolls down along the inclined surface to complete the unloading of the finished product.

[0085] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A positioning flanging mechanism of a four-way valve tube flanging machine, comprising a frame (200), characterized in that: The frame (200) is provided with a positioning loading platform (40), a short hole flanging platform (41) and a D hole flanging platform (42); a rotation positioning structure (43) is provided between the positioning loading platform (40) and the frame (200), which is used to rotate the four-way valve tube in a circumferential direction to adjust the three holes E, S and C to face upward; a short hole flanging structure (44) is provided between the short hole flanging platform (41) and the frame (200), which is used to flanging the short holes (204) at both ends of the four-way valve tube (201) outward; a D hole flanging structure (45) is provided between the D hole flanging platform (42) and the frame (200); and a transfer structure (46) is also provided on the frame (200), which is used to transfer the four-way valve tube to the positioning loading platform (40), the short hole flanging platform (41) and the D hole flanging platform (42) in sequence.

2. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 1, characterized in that: The rotation positioning structure (43) includes a tube body rotation assembly (47) and a limit rod (48) located above the positioning loading platform (40), a limit rod lifting assembly (49) is provided between the limit rod (48) and the frame (200), and the positioning head at the lower end of the limit rod (48) slides or rolls on the outer wall of the four-way valve tube. The position of the positioning head corresponds to at least one of the three holes, and the outer diameter is between the aperture of the D hole (203) and the aperture of the three holes, and can be inserted into the hole to prevent rotation.

3. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 2, characterized in that: The limit rod lifting assembly (49) includes a lifting cylinder (50) whose cylinder body is fixed on the frame (200), the output end of the lifting cylinder (50) is fixedly connected to the limit rod (48), and the positioning head includes a roller (51) or a soft wear-resistant head; The tube body rotating assembly (47) includes a rotating disk (52) located on the two axial sides of the positioning loading platform (40), and the rotating disk (52) is rotatably connected to the inner side of the first clutch slide (53). The first clutch slide (53) is driven by the first clutch drive assembly to move closer to or away from the four-way valve tube, so as to make the rotating disk (52) close to the end of the four-way valve tube (201) for friction transmission. The rotating disk (52) is transmission-connected to the output end of the first motor (54).

4. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 1, characterized in that: The short pore flanging structure (44) includes flanging columns (56) located in two axial directions of the four-way valve tube (201), and a small hole flanging punch (59) is vertically arranged on the upper side of the flanging column (56). The flanging column (56) is arranged on the inner side of the second clutch slide (57). The second clutch slide (57) is slidably connected to the frame (200) and is driven by the second clutch drive component to move closer to or away from the four-way valve tube. A downward pressure component (61) is provided above the short pore flanging platform (41), and the short pore flanging platform (41) is connected to the frame (200) through an elastic telescopic component (82).

5. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 4, characterized in that: The pressing assembly (61) includes a pressing block (62) slidably connected to the frame (200), the pressing block (62) is connected to the output end of the pressing electric cylinder (63), and the bottom surface of the pressing block (62) is provided with a docking groove adapted to the outer diameter of the four-way valve pipe; A positioning column (64) is vertically provided on the lower pressing block (62), and the positioning column (64) is vertically opposite to at least one of the three holes, and a guide cone surface (65) is provided at the lower end, and the guide cone surface (65) is lower than the bottom of the docking groove.

6. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 1, characterized in that: The D-hole flanging structure (45) includes a flanging punch (66) arranged above the D-hole flanging platform (42). The flanging punch (66) is arranged on the frame (200) through a punch lifting assembly. The maximum outer diameter of the flanging punch (66) is smaller than the inner diameter of the three holes, and the position corresponds to the vertical direction of the D-hole. It can pass through the three holes to flanging the D-hole. The frame (200) is also provided with a demoulding blocking assembly (67) for vertically limiting the four-way valve pipe. The D-hole flanging platform (42) is provided with a clearance notch (81) corresponding to the position of the flanging punch (66).

7. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 6, characterized in that: The punch lifting assembly includes a lifting seat (68) slidably connected to the frame (200), and at least two punch mounting holes (69) are provided at the bottom of the lifting seat (68), and the punch mounting holes (69) are respectively opposite to the S hole and the E or C hole. The flanging punch (66) is detachably fixed in the punch mounting hole (69), and the lifting seat (68) is connected to the punch lifting cylinder (84). The demoulding blocking assembly (67) includes an L-shaped demoulding block (70) fixed to the frame (200), and the transverse material blocking portion (71) of the demoulding block (70) is located directly above the end of the four-way valve tube.

8. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 1, characterized in that: The transfer structure (46) includes at least two supporting plates (73) respectively located below the two ends of the four-way valve tube, and at least four notches (83) are evenly distributed axially on the top of the supporting plate (73). A material loading platform (23), a positioning loading platform (40), a short-hole flanging platform (41) and a D-hole flanging platform (42) are evenly arranged along the axial direction of the supporting plate (73), and the spacing between each platform is adapted to the spacing between the notches (83). A lifting component and a transverse movement component are provided between the supporting plate (73) and the frame (200).

9. The positioning and flanging mechanism of the four-way valve tube flanging machine according to claim 8, characterized in that: The transverse shift assembly includes a transfer slide (74) horizontally slidably connected to the frame (200), and the transfer slide (74) is connected to the output end of a horizontal transfer cylinder (75) whose cylinder body is fixed to the frame (200); The lifting assembly includes a lifting slide (76) vertically slidably connected to the transfer slide (74), the lifting slide (76) is connected to the output end of a lifting cylinder (77) whose cylinder body is fixed on the transfer slide (74), and the supporting plate (73) is fixed on the lifting slide (76); A magnetic attraction component (78) is provided in the notch (83); The tail end of the supporting plate (73) is provided with a material cutting slope (79).

10. The positioning and flanging mechanism of the four-way valve tube flanging machine according to any one of claims 1 to 9, characterized in that: The frame (200) is also provided with a lubricating oil conveyor. The first clutch slide (53) of the short-hole flanging structure (44) and the second clutch slide (57) of the D-hole flanging structure (45) are provided with an oiling port (80). The lubricating oil conveyor is connected to the oiling port (80) through an oil pipe.

Images