A stainless steel pipe forming device

Abstract

The present invention relates to the technical field of stainless steel pipe hole expansion, and specifically to a stainless steel pipe forming device, including a stainless steel pipe body and an eddy current measuring instrument for detecting the tube wall of the stainless steel pipe body, the eddy current measuring instrument including an eddy current measuring instrument body and a measuring probe, and also including a base, the upper end of the base is provided with a feeding mechanism, the upper end of the base is also provided with a gradient punching and expanding mechanism for expanding the hole of the stainless steel pipe body, and a heat exchange mechanism and an auxiliary unloading mechanism are provided between the feeding mechanism and the gradient punching and expanding mechanism. The present invention punches three stainless steel pipe bodies respectively by a first punching head, a second punching head, and a third punching head of decreasing sizes, and each stainless steel pipe body realizes gradient punching in this process, adopts intermittent hole expansion (i.e., gradually expanding the aperture multiple times), and reduces the shrinkage through a small amount of deformation during each punching, thereby ensuring the qualified rate of punching and expanding.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel pipe hole expansion, and in particular to a stainless steel pipe forming device. Background Art

[0002] The ends of steel pipe fittings are punched and expanded according to the needs of use. Through expansion and forming, the shape of the pipe end can be changed, which can make the pipe fittings more firmly connected together, effectively prevent leakage, and ensure the safe and stable operation of the system. Stainless steel expansion and forming equipment has a wide range of applicability and can process metal pipes of different materials and specifications to meet various complex processing needs. Stainless steel pipe expansion and forming is widely used in industrial production. For example, in the fields of automobile manufacturing and shipbuilding, the pipe fittings after expansion and forming can better adapt to the complex working environment and improve the overall performance of the system.

[0003] The existing stainless steel pipe punching and expanding forming device is mostly a one-time punching and forming when punching and expanding the stainless steel pipe, such as the stainless steel pipe material forming punching die authorized by China Authorization Publication No. CN203804065U. There are some disadvantages in using this method of punching:

[0004] The end of the stainless steel pipe is expanded by a punching process, and the deformation of the stainless steel pipe is large. On the one hand, after the punching and expansion, the deformation of the material is relatively large, and the concentration of internal stress is more obvious. The expansion part of the end of the stainless steel pipe is prone to shrinkage. On the other hand, during the one-time stamping, since it needs to be stamped to a certain deformation amount, the wall of the stainless steel pipe is subjected to a large punching pressure, and the end of the stainless steel pipe is prone to cracking, which is not conducive to cost control.

[0005] One-time punching and hole expansion is regarded as completing the hole expansion process of stainless steel pipe. However, for stainless steel pipes with thicker tube walls, the hole expansion size obtained by one-time punching is not accurate enough compared with gradual hole expansion. In addition, due to the above-mentioned shrinkage phenomenon, the qualified rate of punching and hole expansion is reduced. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a stainless steel pipe forming device, which can effectively solve the problems that the prior art stainless steel pipe stamping and hole expansion forming devices are mostly one-time stamping forming, the stainless steel pipe has a large deformation amount and is prone to shrinkage and pipe wall cracking.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a stainless steel pipe forming device, comprising a stainless steel pipe body, characterized in that it also comprises a base, the upper end of the base is provided with a feeding mechanism, the upper end of the base is also provided with a gradient punching and expanding mechanism for expanding the hole of the stainless steel pipe body, and a heat exchange mechanism and an auxiliary feeding mechanism are provided between the feeding mechanism and the gradient punching and expanding mechanism;

[0009] The feeding mechanism includes a support seat fixedly connected to the upper end of the base, a feeding trough is provided at the upper end of the support seat, a rotating groove connected to the lower side of the feeding trough is also provided in the support seat, a rotating disk is connected to the rotating groove for limited rotation, a stepping motor for driving the rotating disk to rotate is fixedly installed on the support seat, a plurality of pipe material troughs are arranged in a circular array on the rotating disk, the stainless steel pipe body is located in the pipe material trough, a pipe wall measuring mechanism is arranged at the upper end of the support seat, a plurality of automatic limit assemblies are also arranged at each pipe material trough on the support seat, and a controller is arranged at the front end of the support seat;

[0010] The gradient stamping and expanding hole mechanism includes a mounting plate slidably connected to the upper end of the base, and a first punch head, a second punch head, a third punch head and a feed hole are sequentially arranged in a circular array at one end of the mounting plate close to the feeding mechanism, and the feed hole is located at the highest point, and a receiving plate is fixedly connected to one end of the mounting plate away from the feeding mechanism, and a driving component for driving the mounting plate to move is arranged at the upper end of the base.

[0011] According to the above-mentioned stainless steel pipe forming device, the shape of the limiting block close to the side of the stainless steel pipe body is arc-shaped, and the limiting block is provided with oblique edges.

[0012] According to the above-mentioned stainless steel pipe forming device, the driving assembly includes a guide groove opened at the upper end of the base, a reciprocating screw is rotatably connected in the guide groove, a rotating motor for rotating the reciprocating screw is fixedly installed on the inner side wall of the guide groove, the rod body of the reciprocating screw is slidably matched with a slider, the upper end of the slider is fixedly connected to the mounting vertical plate, the guide groove is square in shape, and the slider is slidably connected to the guide groove.

[0013] According to the above-mentioned stainless steel pipe forming device, the pipe wall measuring mechanism includes a fixed plate fixedly connected to the upper end of the support seat and an eddy current measuring instrument for detecting the pipe wall thickness of the stainless steel pipe body, the fixed plate is fixedly connected to an installation plate at one end close to the stainless steel pipe body, the lower end of the installation plate is fixedly connected to a plurality of connecting springs, the lower ends of the plurality of connecting springs are commonly fixedly connected to a buffer slide, the eddy current measuring instrument includes an eddy current measuring instrument body and a measuring probe, and the eddy current measuring instrument body is installed at the upper end of the mounting plate, the measuring probe is arranged at the lower end of the buffer slide, the measuring probe is electrically connected to the eddy current measuring instrument body, and a lifting component for driving the buffer slide to slide is arranged on the fixed plate.

[0014] According to the above-mentioned stainless steel pipe forming device, the lifting assembly includes a vertical groove opened on a fixed plate, a threaded rod is rotatably connected in the vertical groove, a driving motor for driving the threaded rod to rotate is fixedly installed on the upper end of the fixed plate, a threaded sleeve is threadedly connected to the rod body of the threaded rod, the threaded sleeve is fixedly connected to the buffer slide plate, the vertical groove is square in shape, and the threaded sleeve is slidably connected to the vertical groove.

[0015] According to the above-mentioned stainless steel pipe forming device, a plurality of guide rods are fixedly connected to the upper end of the buffer slide plate, the upper ends of the plurality of guide rods are all arranged through the mounting plate, and a plurality of connecting springs are all arranged on the outside of the guide rods.

[0016] According to the above-mentioned stainless steel pipe forming device, the heat exchange mechanism includes a heat storage cavity opened in the mounting plate, and the other ends of the first punch head, the second punch head, and the third punch head away from the feeding mechanism are all provided with a plurality of cooling fins, and the end of the mounting plate away from the feeding mechanism is fixedly connected to an equipment plate, and a pump is fixedly installed on the equipment plate, and an exhaust pipe is arranged between the pump and the heat storage cavity, and the end of the support seat close to the gradient stamping and expanding mechanism is fixedly connected to a connecting plate, and the right end of the connecting plate close to the stainless steel pipe body is fixedly connected to a heating port, and a delivery pipe is connected between the heating port and the pump, and the mounting plate is provided with an air inlet hole connected to the heat storage cavity.

[0017] According to the above-mentioned stainless steel pipe forming device, the auxiliary unloading mechanism includes an electric push rod fixedly embedded in the front end of the mounting vertical plate, the telescopic end of the electric push rod is fixedly connected to the first tooth plate, the upper end of the base is also limitedly slidably connected to the second tooth plate, the upper end of the base is rotatably connected to a gear meshing with the first tooth plate and the second tooth plate, the second tooth plate is fixedly connected to a connecting rod, and the other end of the connecting rod is fixedly connected to a push plate.

[0018] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] 1. The present invention punches three stainless steel pipe bodies respectively by setting a first punch head, a second punch head, and a third punch head with increasing cross-sectional diameters in a clockwise direction. Each stainless steel pipe body realizes gradient (intermittent) punching in this process. By expanding the hole in steps, the load and cutting heat accumulation during each cutting can be effectively reduced, and the sticking phenomenon can be reduced.

[0020] 2. The present invention adopts intermittent gradient hole expansion (i.e. gradually expanding the hole diameter in multiple times), increasing the hole diameter by a small amount each time. Through a small amount of deformation during each punching, the deformation of the material is relatively small, and the concentration of internal stress is significantly reduced, thereby reducing the shrinkage phenomenon and reducing the shrinkage of the expanded hole at the end of the stainless steel pipe.

[0021] 3. During the stamping process of the present invention, each time the stepper motor drives the rotating disk to rotate 90°, a stainless steel pipe body that has completed gradual hole expansion can be rotated to the top. During the next stamping, the mounting plate drives the first gear to move, and the first tooth plate and the second tooth plate meshing gears drive the push plate to push the stainless steel pipe body that has completed gradient stamping and hole expansion toward the mounting plate. The stainless steel pipe body moves to the upper end of the receiving plate through the unloading hole, and the stainless steel pipe body can be taken out. The unloading is convenient, the steps are compact, the hole expansion efficiency is high and the effect is good.

[0022] 4. The present invention can non-destructively detect the wall thickness of the stainless steel pipe body by setting up a pipe wall measuring mechanism. When the eddy current measuring instrument detects that the wall of the stainless steel pipe body is too thick, the electric push rod is retracted to drive the first tooth plate to disengage from the gear, so that the stepper motor drives the rotating disk to rotate and drive the pipe fitting with the excessively thick wall to be repeatedly punched. After the pipe fitting is formed, the first tooth plate is pushed to engage with the gear, and the above-mentioned feeding steps are repeated to ensure the punching effect of the stainless steel pipe body and the qualified rate of punching and hole expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of the present invention from a first viewing angle;

[0025] Figure 2 for Figure 1 The structural diagram of the rotating disk in the middle;

[0026] Figure 3 It is a structural schematic diagram of the second viewing angle of the present invention;

[0027] Figure 4 for Figure 3 The structural diagram of the enlarged part A in the middle;

[0028] Figure 5 for Figure 3 A schematic diagram of the structure of the middle connecting rod and the push plate;

[0029] Figure 6 It is a structural schematic diagram of the present invention from a third viewing angle;

[0030] Figure 7 for Figure 6 The enlarged structural diagram of part B in the middle;

[0031] Figure 8 for Figure 6 Schematic diagram of the enlarged structure of part C.

[0032] Figure numerals: 1, base; 2, feeding mechanism; 21, support seat; 22, feeding trough; 23, rotating trough; 24, rotating disk; 25, stepping motor; 26, pipe trough; 27, automatic limit assembly; 271, sliding cavity; 272, limit block; 273, limit spring; 3, stainless steel pipe body; 4, gradient punching and expanding mechanism; 41, mounting plate; 42, first punch head; 43, second punch head; 44, third punch head; 45, feeding hole; 46, guide groove; 47, reciprocating screw rod; 48, rotating motor; 49, slider; 5, pipe wall measuring mechanism; 51, fixed plate; 5 2. Mounting plate; 53. Connecting spring; 54. Buffer slide plate; 55. Guide rod; 56. Eddy current measuring instrument body; 57. Measuring probe; 58. Vertical slot; 59. Threaded rod; 510. Driving motor; 6. Heat exchange mechanism; 61. Heat storage chamber; 62. Cooling fins; 63. Equipment plate; 64. Pump; 65. Exhaust pipe; 66. Air inlet; 67. Delivery pipe; 68. Connecting plate; 69. Heating port; 7. Receiving plate; 8. Auxiliary unloading mechanism; 81. First tooth plate; 82. Second tooth plate; 83. Gear; 84. Connecting rod; 85. Push plate; 86. Electric push rod; 9. Controller. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention will be further described below in conjunction with the embodiments.

[0035] Example: Refer to Figures 1 to 8 , a stainless steel pipe forming device, including a stainless steel pipe body 3 and an eddy current measuring instrument for detecting the pipe wall of the stainless steel pipe body 3, the eddy current measuring instrument including an eddy current measuring instrument body 56 and a measuring probe 57, the eddy current measuring instrument is an existing well-known technology, the principle of the eddy current measuring instrument for measuring the pipe wall thickness of the stainless steel pipe body 3 is based on Faraday's law of electromagnetic induction, when the coil in the probe of the eddy current measuring instrument is passed through a high-frequency current, an alternating magnetic field will be generated, this magnetic field will generate eddy currents in the stainless steel pipe, the size and direction of the eddy current are related to the strength and frequency of the magnetic field, and will also be affected by the electrical conductivity and magnetic permeability of the steel pipe, during measurement, the measuring probe 57 is touched to the surface of the pipe wall of the stainless steel pipe body 3, the eddy current signal generated by the measuring probe 57 will be received by the probe, and analyzed by the eddy current measuring instrument body 56, the equipment will send a response signal according to factors such as the thickness, conductivity, and geometric shape of the pipe wall, the greater the thickness, the stronger the eddy current signal generated; conversely, the signal is weaker. ‌

[0036] The utility model also includes a base 1, and a feeding mechanism 2 is arranged on the upper end of the base 1. Specifically, the feeding mechanism 2 includes a support seat 21 fixedly connected to the upper end of the base 1, and a feeding trough 22 is provided on the upper end of the support seat 21. A rotating groove 23 connected to the lower side of the feeding trough 22 is also provided in the support seat 21. A rotating disk 24 is connected to the rotating groove 23 in a limited rotation manner. A stepping motor 25 for driving the rotating disk 24 to rotate is fixedly installed on the support seat 21, and a plurality of pipe troughs 26 are arranged in a circular array on the rotating disk 24. Figure 2 As shown in the example, the number of the pipe slots 26 is 4, and the step angle of the stepper motor 25 is 360° / the number of the pipe slots 26 (360° / 4), so the step angle of the stepper motor 25 is 90°.

[0037] The stainless steel pipe body 3 is located in the pipe material trough 26, and a pipe wall measuring mechanism 5 is provided at the upper end of the support seat 21. Specifically, the pipe wall measuring mechanism 5 includes a fixing plate 51 fixedly connected to the upper end of the support seat 21, and the fixing plate 51 is fixedly connected to an installation plate 52 at one end close to the stainless steel pipe body 3, and a plurality of connecting springs 53 are fixedly connected to the lower end of the installation plate 52, and a buffer slide plate 54 is fixedly connected to the lower end of the plurality of connecting springs 53, and a plurality of guide rods 55 are fixedly connected to the upper end of the buffer slide plate 54, and the upper ends of the plurality of guide rods 55 are all arranged through the installation plate 52, and the plurality of connecting springs 53 are all arranged on the outside of the guide rods 55, and the guide rods 55 guide the buffer slide plate 54, and on the other hand, it can also prevent the connecting springs 53 from easily undergoing elastic deformation.

[0038] The eddy current measuring instrument body 56 is installed on the upper end of the mounting plate 52, and the measuring probe 57 is arranged at the lower end of the buffer slide 54. The measuring probe 57 is electrically connected to the eddy current measuring instrument body 56 through a connecting line. A lifting component for driving the buffer slide 54 to slide is arranged on the fixed plate 51. Specifically, the lifting component includes a vertical groove 58 opened on the fixed plate 51, and a threaded rod 59 is rotatably connected in the vertical groove 58. A driving motor 510 for driving the threaded rod 59 to rotate is fixedly installed on the upper end of the fixed plate 51. The rod body of the threaded rod 59 is threadedly connected with a threaded sleeve, and the threaded sleeve is fixedly connected to the buffer slide 54. The vertical groove 58 is square in shape, and the threaded sleeve is slidably connected to the vertical groove 58. The square vertical groove 58 limits the threaded sleeve to ensure the rotation of the threaded rod 59, and the threaded sleeve can slide vertically on the rod body of the threaded rod 59.

[0039] During measurement, the driving motor 510 drives the threaded rod 59 to rotate, driving the threaded sleeve to slide vertically downward on the rod body of the threaded rod 59, driving the buffer slide plate 54 to move downward, driving the measuring probe 57 to move downward, and contacting the surface of the stainless steel pipe body 3 to perform measurement. By setting a plurality of connecting springs 53, the measuring probe 57 is buffered and protected to prevent damage when the measuring probe 57 descends and contacts the stainless steel pipe body 3.

[0040] A plurality of automatic limit assemblies 27 are further provided at each pipe material trough 26 on the support seat 21. Specifically, the automatic limit assemblies 27 include a sliding cavity 271 provided on the support seat 21. The sliding cavity 271 is slidably connected to a limit block 272. A plurality of limit springs 273 are fixedly connected between the limit block 272 and the sliding cavity 271. The stainless steel pipe body 3 is pushed to the loading trough 22. Under the gravity of the stainless steel pipe body 3 itself, the limit block 272 is abutted. Since the limit block 272 has an oblique edge, the limit block 272 is driven to slide into the sliding cavity 271. The plurality of limit springs 273 are compressed until the stainless steel pipe body 3 falls into the pipe material trough 26. Under the elastic force of the plurality of limit springs 273, the limit block 272 slides out of the sliding cavity 271 to limit the stainless steel pipe body 3.

[0041] The shape of the limiting block 272 close to the stainless steel pipe body 3 is arc-shaped, and the arc-shaped shape is adapted to the shape of the stainless steel pipe body 3, so as to better limit the stainless steel pipe body 3.

[0042] A controller 9 is disposed at the front end of the support base 21 . The controller 9 is electrically connected to the eddy current measuring instrument body 56 , the stepping motor 25 , and the electric push rod 86 .

[0043] The upper end of the base 1 is also provided with a gradient stamping and expanding mechanism 4 for expanding the hole of the stainless steel pipe body 3. Specifically, the gradient stamping and expanding mechanism 4 includes a mounting plate 41 slidably connected to the upper end of the base 1, and the mounting plate 41 is close to the end of the feeding mechanism 2 and is sequentially provided with a first punch head 42, a second punch head 43, a third punch head 44 and a feed hole 45 in a circular array, and the feed hole 45 is located at the highest point. Taking the feed hole 45 as the reference point, the first punch head 42, the second punch head 43, and the third punch head 44 are distributed clockwise, and the punch head sizes of the first punch head 42, the second punch head 43, and the third punch head 44 are increased.

[0044] The upper end of the base 1 is provided with a driving assembly for driving the installation vertical plate 41 to move. Specifically, the driving assembly includes a guide groove 46 opened at the upper end of the base 1. A reciprocating screw rod 47 is rotatably connected in the guide groove 46. A rotating motor 48 for rotating the reciprocating screw rod 47 is fixedly installed on the inner side wall of the guide groove 46. The rod body of the reciprocating screw rod 47 is slidably matched with a slider 49. The upper end of the slider 49 is fixedly connected to the installation vertical plate 41. The shape of the guide groove 46 is square, and the slider 49 is slidably connected to the guide groove 46. During stamping, the rotating motor 48 drives the reciprocating screw 47 to rotate, driving the mounting plate 41 to move toward the upper feeding mechanism 2, so that the first punching head 42, the second punching head 43, and the third punching head 44 respectively punch and expand the three stainless steel pipe bodies 3 located on the lower side, and the stepping motor 25 drives the rotating disk 24 to rotate counterclockwise to ensure that after the stainless steel pipe body 3 enters the pipe material trough 26 from the upper feeding trough 22, it passes through the first punching head 42, the second punching head 43, and the third punching head 44 in turn for gradient stamping.

[0045] A heat exchange mechanism 6 is arranged between the feeding mechanism 2 and the gradient stamping and expanding mechanism 4. Specifically, the heat exchange mechanism 6 includes a heat storage cavity 61 opened in the mounting plate 41. The first punch head 42, the second punch head 43, and the third punch head 44 are each provided with a plurality of heat dissipation fins 62 at the other end away from the feeding mechanism 2. An equipment plate 63 is fixedly connected to the end of the mounting plate 41 away from the feeding mechanism 2. A pump 64 is fixedly installed on the equipment plate 63. An exhaust pipe 65 is arranged between the pump 64 and the heat storage cavity 61. A connecting plate 68 is fixedly connected to the end of the support seat 21 close to the gradient stamping and expanding mechanism 4. A heating port 69 is fixedly connected to the right end of the connecting plate 68 close to the stainless steel pipe body 3. The mounting plate is provided with an air inlet hole connected to the heat storage cavity. A conveying pipe 67 is connected between the heating port 69 and the pump 64. After the punch heads continuously stamp the stainless steel pipe body 3, the first punch head 42, the second punch head 43, the third punch head 44, the heat dissipation fins 62 are arranged at the other end away from the feeding mechanism 2. The temperature of the three punch heads 44 will rise, and temperature is a key factor affecting the sticking problem during the hole expansion process. Too high a temperature will increase adhesion. Therefore, taking effective cooling measures and controlling the temperature of the punch heads is an effective way to reduce sticking. A plurality of heat dissipation fins 62 are provided at the other end of the first punch head 42, the second punch head 43, and the third punch head 44 away from the feeding mechanism 2 to increase the heat dissipation efficiency of the punch heads. The heat dissipated by the first punch head 42, the second punch head 43, and the third punch head 44 is stored in the heat storage chamber 61. The hot air in the heat storage chamber 61 is blown to the stainless steel pipe body 3 at the top through the conveying pipe 67 and the heating port 69 by the pump 64, so as to preheat the pipe wall at the expansion hole of the stainless steel pipe body 3. Preheating the stainless steel pipe body 3 helps to increase the shaping of the stainless steel pipe body 3, reduce the resistance during stamping, and realize the recovery of heat through the heat exchange mechanism 6.

[0046] The auxiliary unloading mechanism 8, specifically, the auxiliary unloading mechanism 8 includes an electric push rod 86 fixedly embedded and installed at the front end of the mounting plate 41. The electric push rod 86 controls the meshing of the first tooth plate 81 and the gear 83 described below. When the eddy current measuring instrument detects the normal range value of the tube wall of the stainless steel pipe body 3, the meshing of the first tooth plate 81 and the gear 83 ensures normal unloading. When the eddy current measuring instrument detects that the tube wall of the stainless steel pipe body 3 is too thick, the electric push rod 86 is retracted to drive the first tooth plate 81 to disengage from the gear 83, so that the stepper motor 25 drives the rotating disk 24 to rotate 2-4 times, and then cyclically stamps the stainless steel pipe body 3 with too thick tube wall, and then pushes the first tooth plate 81 to mesh with the gear 83 to ensure the punching effect of the stainless steel pipe body 3.

[0047] The telescopic end of the electric push rod 86 is fixedly connected to the first tooth plate 81, and the upper end of the base 1 is also limitedly slidably connected to the second tooth plate 82. The upper end of the base 1 is rotatably connected to a gear 83 that meshes with the first tooth plate 81 and the second tooth plate 82. The second tooth plate 82 is fixedly connected to a connecting rod 84, and the other end of the connecting rod 84 is fixedly connected to a push plate 85, so that it falls into the uppermost pipe material trough 26. After a counterclockwise rotation, it returns to the uppermost position to complete the gradient punching and expanding, and the vertical plate 41 is installed. When stamping again, the first tooth plate 81 is driven to move, and the first tooth plate 81 and the second tooth plate 82 are meshed with the gear 83, which drives the second tooth plate 82 and the first tooth plate 81 to slide relative to each other, and the push plate 85 is driven by the connecting rod 84 to push in the direction of the mounting vertical plate 41, and the push plate 85 is driven to push the stainless steel pipe body 3 that has completed the gradient stamping and expansion toward the mounting vertical plate 41. This stainless steel pipe body 3 moves to the upper end of the receiving plate 7 through the discharge hole 45, and the stainless steel pipe body 3 can be taken out.

[0048] The specific working principle of the present invention is:

[0049] It should be noted in advance that, with the lower material hole 45 as the starting point, the first punch head 42, the second punch head 43, and the third punch head 44 are distributed clockwise, and the cross-sectional diameters increase gradually; the stepper motor 25 drives the rotating disk 24 to rotate counterclockwise, the number of the tube material troughs 26 on the rotating disk 24 is 4, and the step angle of the stepper motor 25 is 90°.

[0050] First, push the stainless steel pipe body 3 to the feeding trough 22. Under the gravity of the stainless steel pipe body 3, it abuts against the limit block 272. Since the limit block 272 has an oblique edge, it drives the limit block 272 to slide into the sliding cavity 271, and the plurality of limit springs 273 are compressed until the stainless steel pipe body 3 falls into the pipe feeding trough 26. Under the elastic force of the plurality of limit springs 273, the limit block 272 slides out of the sliding cavity 271, thereby limiting the stainless steel pipe body 3.

[0051] When the eddy current measuring instrument detects the normal range value of the tube wall of the stainless steel tube body 3, the first tooth plate 81 is meshed with the gear 83, and the rotating motor 48 drives the reciprocating screw 47 to rotate, driving the mounting plate 41 to move in the direction of the upper feeding mechanism 2 first, and the first punch head 42, the second punch head 43, and the third punch head 44 respectively punch the three stainless steel tube bodies 3, and each stainless steel tube body 3 is gradient stamped in this process. During the stamping process, the mounting plate 41 drives the first tooth plate 81 to move, and the first tooth plate 81 and the second tooth plate 82 are meshed. The gear 83 drives the second tooth plate 82 to slide relative to the first tooth plate 81, and drives the push plate 85 to push in the direction of the mounting plate 41 through the connecting rod 84, and drives the push plate 85 to push the stainless steel pipe body 3 that has completed the gradient punching and expansion toward the mounting plate 41. The stainless steel pipe body 3 moves to the upper end of the receiving plate 7 through the discharge hole 45, and the stainless steel pipe body 3 can be taken out, and then the rotating motor 48 continues to drive the reciprocating screw rod 47 to rotate, driving the mounting plate 41 and the push plate 85 to reset, and pushing the new stainless steel pipe body 3 into the pipe material groove 26;

[0052] When the eddy current measuring instrument detects that the wall of the stainless steel pipe body 3 is too thick, the electric push rod 86 is retracted to drive the first tooth plate 81 to disengage from the gear 83, so that the stepper motor 25 drives the rotating disk 24 to rotate 2-4 circles, and then the first tooth plate 81 is pushed to engage with the gear 83, and the above-mentioned blanking steps are repeated to ensure the punching effect of the stainless steel pipe body 3.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stainless steel pipe forming device, comprising a stainless steel pipe body (3), characterized in that: It also comprises a base (1), the upper end of the base (1) being provided with a feeding mechanism (2), the upper end of the base (1) being provided with a gradient punching and expanding mechanism (4) for expanding the hole of the stainless steel pipe body (3), and a heat exchange mechanism (6) and an auxiliary feeding mechanism (8) being provided between the feeding mechanism (2) and the gradient punching and expanding mechanism (4); The feeding mechanism (2) comprises a support seat (21) fixedly connected to the upper end of the base (1), a feeding trough (22) being provided at the upper end of the support seat (21), a rotating trough (23) being provided in the support seat (21) and communicating with the lower side of the feeding trough (22), a rotating disk (24) being connected in a limited rotation manner in the rotating trough (23), a stepping motor (25) for driving the rotating disk (24) to rotate being fixedly mounted on the support seat (21), a plurality of pipe material troughs (26) being provided in an annular array on the rotating disk (24), the stainless steel pipe body (3) being located in the pipe material troughs (26), a pipe wall measuring mechanism (5) being provided at the upper end of the support seat (21), a plurality of automatic limit assemblies (27) being provided at each pipe material trough (26) on the support seat (21), and a controller (9) being provided at the front end of the support seat (21); The gradient punching and reaming mechanism (4) comprises a mounting plate (41) slidably connected to the upper end of the base (1); a first punch head (42), a second punch head (43), a third punch head (44) and a feed hole (45) are sequentially arranged in a circular array at one end of the mounting plate (41) close to the feeding mechanism (2), and the feed hole (45) is located at the highest point; a receiving plate (7) is fixedly connected to one end of the mounting plate (41) away from the feeding mechanism (2); a driving component for driving the mounting plate (41) to move is arranged at the upper end of the base (1); and the pipe wall measuring mechanism (5) comprises a fixing plate (51) fixedly connected to the upper end of the support seat (21) and a vortex for detecting the pipe wall thickness of the stainless steel pipe body (3). The eddy current measuring instrument comprises an eddy current measuring instrument body (56) and a measuring probe (57), wherein the eddy current measuring instrument body (56) is mounted on the upper end of the mounting plate (52), the measuring probe (57) is arranged on the lower end of the buffer slide (54), and the measuring probe (57) is electrically connected to the eddy current measuring instrument body (56). The fixing plate (51) is provided with a lifting component for driving the buffer slide (54) to slide.

2. A stainless steel pipe forming device according to claim 1, characterized in that: The automatic limit assembly (27) comprises a sliding cavity (271) opened on the support seat (21), the sliding cavity (271) is slidably connected to a limit block (272), and a plurality of limit springs (273) are fixedly connected between the limit block (272) and the sliding cavity (271).

3. A stainless steel pipe forming device according to claim 2, characterized in that: The shape of the limiting block (272) close to the side of the stainless steel pipe body (3) is arc-shaped, and the limiting block (272) is provided with oblique edges.

4. A stainless steel pipe forming device according to claim 1, characterized in that: The driving assembly comprises a guide groove (46) opened at the upper end of the base (1), a reciprocating screw rod (47) being rotatably connected in the guide groove (46), a rotating motor (48) for rotating the reciprocating screw rod (47) being fixedly mounted on the inner side wall of the guide groove (46), a slider (49) being slidably matched with the rod body of the reciprocating screw rod (47), an upper end of the slider (49) being fixedly connected to the mounting vertical plate (41), the guide groove (46) being square in shape, and the slider (49) being slidably connected to the guide groove (46).

5. A stainless steel pipe forming device according to claim 1, characterized in that: The lifting assembly comprises a vertical slot (58) formed on a fixed plate (51), a threaded rod (59) being rotatably connected in the vertical slot (58), a driving motor (510) for driving the threaded rod (59) to rotate being fixedly mounted on the upper end of the fixed plate (51), a threaded sleeve being threadedly connected to the rod body of the threaded rod (59), the threaded sleeve being fixedly connected to the buffer slide plate (54), the vertical slot (58) being square in shape, and the threaded sleeve being slidably connected to the vertical slot (58).

6. A stainless steel pipe forming device according to claim 1, characterized in that: The upper end of the buffer slide plate (54) is fixedly connected to a plurality of guide rods (55), the upper ends of the plurality of guide rods (55) are all arranged through the mounting plate (52), and a plurality of connection springs (53) are arranged one by one on the outer side of each guide rod (55).

7. A stainless steel pipe forming device according to claim 1, characterized in that: The heat exchange mechanism (6) comprises a heat storage chamber (61) opened in the mounting plate (41); the other ends of the first punch head (42), the second punch head (43) and the third punch head (44) away from the feeding mechanism (2) are each provided with a plurality of heat dissipation fins (62); the end of the mounting plate (41) away from the feeding mechanism (2) is fixedly connected to a device plate (63); a pump (64) is fixedly installed on the device plate (63); an air extraction pipe (65) is provided between the pump (64) and the heat storage chamber (61); the end of the support seat (21) close to the gradient punching and expanding mechanism (4) is fixedly connected to a connecting plate (68); the right end of the connecting plate (68) close to the stainless steel pipe body (3) is fixedly connected to a heating port (69); a delivery pipe (67) is connected between the heating port (69) and the pump (64); and the mounting plate (41) is provided with an air inlet hole (66) connected to the heat storage chamber (61).

8. The stainless steel tube forming device according to claim 1, characterized in that: The auxiliary unloading mechanism (8) comprises an electric push rod (86) fixedly embedded and installed at the front end of the mounting vertical plate (41); the telescopic end of the electric push rod (86) is fixedly connected to a first tooth plate (81); the upper end of the base (1) is also limitedly slidably connected to a second tooth plate (82); the upper end of the base (1) is rotatably connected to a gear (83) meshing with the first tooth plate (81) and the second tooth plate (82); the second tooth plate (82) is fixedly connected to a connecting rod (84); the other end of the connecting rod (84) is fixedly connected to a push plate (85).

Images