Stainless steel pipe fitting bending device

Abstract

The invention discloses a stainless steel pipe fitting bending device which comprises a bottom plate, and a bending mechanism and a polishing mechanism are arranged above the bottom plate. And the number of the bending mechanisms is two, the two bending mechanisms are symmetrically arranged on the two sides of the polishing mechanism, each bending mechanism comprises an end bending assembly and a middle bending assembly, and the end bending assemblies and the middle bending assemblies are used for bending the stainless steel pipes. And the polishing mechanism comprises two symmetrically-arranged polishing assemblies, each polishing assembly comprises two symmetrically-arranged polishing heads, and the polishing heads are used for polishing the ends of the stainless steel pipes so that the bent stainless steel pipes can be conveniently used. Bending and polishing of the stainless steel pipe to be machined are automatically completed through the bending mechanism and the polishing mechanism, so that the machined stainless steel pipe can be convenient to use, and the mounting efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of processing equipment, and particularly relates to a bending device for stainless steel pipe fittings. Background Art

[0002] In modern industrial production, stainless steel pipes are widely used in many fields such as construction, machinery manufacturing, automotive industry, aerospace, etc. due to their good corrosion resistance, high strength, and aesthetic appearance. In these application scenarios, it is often necessary to process stainless steel pipes into various specific shapes, and bending is a common processing technology.

[0003] Traditional stainless steel pipe bending devices can meet the basic bending requirements to a certain extent. Early bending equipment mostly adopted simple mechanical structures and realized the bending of steel pipes through manual operation or basic mechanical transmission. Such equipment has a simple structure and low cost, but has problems such as poor accuracy and low efficiency, and it is difficult to meet the industrial production requirements with high precision. However, existing various stainless steel pipe bending devices still have many deficiencies when facing the processing of complex pipe fittings that require multiple bends, especially four bends. On the one hand, existing bending equipment can often only perform one or two bends. If multiple bends are to be achieved, the operator needs to adjust the position of the pipe fitting in the equipment multiple times, reposition and clamp it, which not only consumes a lot of time, but also the multiple clamps are likely to cause the accumulation of positioning errors of the pipe fitting, affecting the accuracy and quality of the final product. On the other hand, for complex pipe fittings that require four bends, existing bending devices have difficulties in coordinating the control of the bending sequence and angle, and it is difficult to achieve precise and efficient processing. In view of the above problems, the present invention provides a bending device for stainless steel pipe fittings. Summary of the Invention

[0004] In view of the above technical problems, the technical solution adopted by the present invention is: a bending device for stainless steel pipe fittings, including a bottom plate, and a bending mechanism and a grinding mechanism are arranged above the bottom plate.

[0005] There are two bending mechanisms, and the two bending mechanisms are symmetrically arranged on both sides of the grinding mechanism. The bending mechanism includes an end bending component and a middle bending component, and the end bending component and the middle bending component are used for bending stainless steel pipes.

[0006] The grinding mechanism includes two symmetrically arranged grinding components, and each grinding component includes two symmetrically arranged grinding heads. The grinding heads are used for grinding the ends of stainless steel pipes to facilitate the use of the bent stainless steel pipes.

[0007] Furthermore, the end bending assembly includes two symmetrically arranged end bending wheels, which are fixedly connected to the extending end of an end bending cylinder. The end bending cylinder is installed on a first end connecting block, and the two first end connecting blocks are respectively installed on the two extending ends of a double-headed cylinder. The double-headed cylinder is fixedly connected to a second end connecting block, and the second end connecting block is connected to a horizontal moving assembly. When bending a stainless steel pipe, the two end bending wheels are used to bend the ends of the stainless steel pipe, so as to generate a first bending part and a fourth bending part on the stainless steel pipe.

[0008] Furthermore, the middle bending assembly includes two symmetrically arranged middle guiding wheels, which are installed on a cross bar. The two cross bars are respectively connected to the extending ends of two first middle cylinders, and the two first middle cylinders are respectively fixedly installed inside two lifting boxes. When bending a stainless steel pipe, the two middle guiding wheels are used to bend the middle of the stainless steel pipe, so as to generate a second bending part and a third bending part on the stainless steel pipe.

[0009] Furthermore, the middle bending assembly further includes a middle bending wheel, which is fixedly connected to the extending end of a separating cylinder. The separating cylinder is connected to a middle connecting block. A second middle lead screw and a second middle guiding rod are connected to the middle connecting block. The second middle lead screw is in threaded cooperation with the middle connecting block and is fixedly connected to the output shaft of a second middle motor fixedly installed on a moving table. The second middle guiding rod is fixedly installed on the moving table, and the moving table is connected to a vertical moving assembly.

[0010] Furthermore, the two lifting boxes are symmetrically arranged. Two symmetrically arranged moving blocks are slidably installed on the lifting box. A return spring is arranged between the moving block and the lifting box. A plurality of clamping wheels for bending are rotatably installed on the moving block. The moving block is connected to a distance adjusting assembly, and the distance adjusting assembly is used to adjust the distance between the two moving blocks. When bending a stainless steel pipe, the clamping wheels on the two symmetrically arranged moving blocks are used to fix the stainless steel pipe.

[0011] Furthermore, the distance adjusting assembly includes two symmetrically arranged wedge blocks, which are respectively fixedly installed on the two moving blocks. An inclined surface is arranged on the wedge block, and the inclined surface is in sliding cooperation with a driving column. The two driving columns are fixedly installed on a connecting rod, and the connecting rod is fixedly connected to the extending end of a distance adjusting cylinder. The distance adjusting cylinder is fixedly installed inside the lifting box.

[0012] Further, a lifting block is fixedly installed on each of the two lifting boxes. The lifting block is in threaded cooperation with the lifting lead screw and is slidably engaged with the lifting guide rod. The lifting lead screw is rotatably installed on the support plate, and the lifting block is fixedly installed on the support plate. The lifting lead screw is fixedly connected to the output shaft of the lifting motor fixedly installed on the support plate.

[0013] Further, the grinding assembly further includes two symmetrically arranged grinding cylinders. The grinding cylinders are fixedly installed on the center frame. The extending end of the grinding cylinder is fixedly connected to the mounting frame. The mounting frame is fixedly connected to the grinding motor. The output shaft of the grinding motor is connected to the grinding head. The center frame is fixedly installed on the bottom plate.

[0014] Further, two symmetrically arranged separating cylinders are fixedly installed on the bottom plate. The extending ends of the two separating cylinders are respectively connected to the two support plates. The support plates are slidably engaged with the bottom plate.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: (1) The present invention automatically completes the bending and grinding of the stainless steel pipe to be processed through the bending mechanism and the grinding mechanism, so that the processed stainless steel pipe is convenient to use and the installation efficiency is improved; (2) When bending the stainless steel pipe to be processed, the present invention can complete four bends through one clamping, improving the bending accuracy and reducing the number of clamping and positioning times; (3) The present invention can meet the bending processing requirements of stainless steel pipes with different lengths and different diameters, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 is Figure 1 a schematic diagram of the structure from another angle Figure 1 .

[0018] Figure 3 is Figure 1 a schematic diagram of the structure from another angle Figure 2 .

[0019] Figure 4 is Figure 3 a partially enlarged schematic diagram of the structure at A1 in

[0020] Figure 5 is a partial cross-sectional view of a part of the structure of the present invention.

[0021] Figure 6 is Figure 5 a partially enlarged schematic diagram of the structure at A2 in

[0022] Figure 7 is a schematic diagram of a part of the structure of the present inventionFigure 1 .

[0023] Figure 8 is Figure 7 a partially enlarged structural schematic diagram of the A3 position in

[0024] Figure 9 a structural schematic diagram of the grinding mechanism in the present invention.

[0025] Figure 10 a partial structural schematic of the present invention Figure 2 .

[0026] Figure 11 is a structural schematic diagram of a stainless steel pipe after bending is completed.

[0027] Reference numerals in the drawings: 1 - bottom plate; 2 - support plate; 3 - lifting box; 4 - clamping wheel; 5 - moving block; 6 - return spring; 7 - wedge block; 8 - inclined surface; 9 - driving column; 10 - connecting rod; 11 - distance adjusting cylinder; 12 - end bending wheel; 13 - end bending cylinder; 14 - first end connecting block; 15 - double - headed cylinder; 16 - second end connecting block; 17 - horizontal lead screw; 18 - end guide rod; 19 - end bending motor; 20 - first middle cylinder; 21 - cross bar; 22 - middle guide wheel; 23 - first middle motor; 24 - first middle lead screw; 25 - first middle guide rod; 26 - moving table; 27 - second middle lead screw; 28 - second middle guide rod; 29 - second middle motor; 30 - middle bending wheel; 31 - lifting block; 32 - lifting lead screw; 33 - lifting guide rod; 34 - lifting motor; 35 - center frame; 36 - grinding cylinder; 37 - mounting frame; 38 - grinding motor; 39 - grinding head; 40 - separating cylinder; 41 - guide rail; 42 - roller; 43 - stainless steel pipe; 4301 - first bending part; 4302 - second bending part; 4303 - third bending part; 4304 - fourth bending part; 44 - second middle cylinder; 45 - middle connecting block. Detailed implementation manners

[0028] The technical solution of the present invention will be further described below with reference to the drawings and through specific implementation manners.

[0029] Example: As Figure 1 — Figure 11 shown, a stainless steel pipe fitting bending device includes a bottom plate 1, and a bending mechanism and a grinding mechanism are arranged above the bottom plate 1.

[0030] There are two bending mechanisms, and the two bending mechanisms are symmetrically arranged on both sides of the grinding mechanism. The bending mechanism includes an end bending component and a middle bending component, and the end bending component and the middle bending component are used for bending the stainless steel pipe 43.

[0031] The grinding mechanism includes two symmetrically arranged grinding components. Each grinding component includes two symmetrically arranged grinding heads 39. The grinding heads 39 are used to grind the ends of the stainless steel pipe 43 to facilitate the use of the bent stainless steel pipe 43.

[0032] The end bending component includes two symmetrically arranged end bending wheels 12. The end bending wheels 12 are fixedly connected to the extending ends of the end bending cylinders 13. The end bending cylinders 13 are installed on the first end connecting blocks 14. The two first end connecting blocks 14 are respectively installed on the two extending ends of the double-headed cylinder 15. The double-headed cylinder 15 is fixedly connected to the second end connecting block 16. The second end connecting block 16 is connected to the horizontal moving component. When bending the stainless steel pipe 43, the two end bending wheels 12 are used to bend the ends of the stainless steel pipe 43 to generate a first bending part 4301 and a fourth bending part 4304 on the stainless steel pipe 43.

[0033] Specifically, the horizontal moving component includes a horizontal lead screw 17. The horizontal lead screw 17 is in threaded cooperation with the second end connecting block 16. The horizontal lead screw 17 is fixedly connected to the output shaft of the end bending motor 19 fixedly installed on the support plate 2. The support plate 2 is also fixedly installed with an end guiding rod 18. The end guiding rod 18 is in sliding cooperation with the second end connecting block 16. When the end bending motor 19 drives the horizontal lead screw 17 to rotate, the second end connecting block 16 can slide horizontally along the end guiding rod 18.

[0034] The middle bending component includes two symmetrically arranged middle guiding wheels 22. The middle guiding wheels 22 are installed on the cross bars 21. The two cross bars 21 are respectively connected to the extending ends of the two first middle cylinders 20. The two first middle cylinders 20 are respectively fixedly installed inside the two lifting boxes 3. When bending the stainless steel pipe 43, the two middle guiding wheels 22 are used to bend the middle of the stainless steel pipe 43 to generate a second bending part 4302 and a third bending part 4303 on the stainless steel pipe 43.

[0035] The middle bending component further includes a middle bending wheel 30. The middle bending wheel 30 is fixedly connected to the extending end of the separating cylinder 40. The separating cylinder 40 is connected to the middle connecting block 45. The middle connecting block 45 is connected with a second middle lead screw 27 and a second middle guiding rod 28. The second middle lead screw 27 is in threaded cooperation with the middle connecting block 45 and is fixedly connected to the output shaft of the second middle motor 29 fixedly installed on the moving table 26. The second middle guiding rod 28 is fixedly installed on the moving table 26. The moving table 26 is connected to the vertical moving component.

[0036] Specifically, the vertical movement component includes a middle lead screw 24 rotatably mounted on the support plate 2 and a middle guide rod 25 fixedly mounted on the support plate 2. The middle guide rod 25 is slidably engaged with the moving table 26, and the middle lead screw 24 is threadedly engaged with the moving table 26. The middle lead screw 24 is fixedly connected to the output shaft of the middle motor 23, and the middle motor 23 is fixedly mounted on the support plate 2. When the output shaft of the middle motor 23 drives the middle lead screw 24 to rotate, the moving table 26 slides in the vertical direction along the middle guide rod 25.

[0037] Two lifting boxes 3 are symmetrically arranged. Two symmetrically arranged moving blocks 5 are slidably mounted on the lifting box 3. A return spring 6 is provided between the moving block 5 and the lifting box 3. A plurality of clamping wheels 4 for bending are rotatably mounted on the moving block 5. The moving block 5 is connected to an adjustable distance component, and the adjustable distance component is used to adjust the distance between the two moving blocks 5; when bending the stainless steel pipe 43, the clamping wheels 4 on the two symmetrically arranged moving blocks 5 are used to fix the stainless steel pipe 43.

[0038] The adjustable distance component includes two symmetrically arranged wedge blocks 7. The two wedge blocks 7 are respectively fixedly mounted on the two moving blocks 5. An inclined surface 8 is provided on the wedge block 7, and the inclined surface 8 is slidably engaged with the driving column 9. The two driving columns 9 are fixedly mounted on the connecting rod 10, and the connecting rod 10 is fixedly connected to the extending end of the adjustable distance cylinder 11. The adjustable distance cylinder 11 is fixedly mounted inside the lifting box 3.

[0039] One lifting block 31 is respectively fixedly mounted on the two lifting boxes 3. The lifting block 31 is threadedly engaged with the lifting lead screw 32, and the lifting block 31 is slidably engaged with the lifting guide rod 33. The lifting lead screw 32 is rotatably mounted on the support plate 2, and the lifting guide rod 33 is fixedly mounted on the support plate 2. The lifting lead screw 32 is fixedly connected to the output shaft of the lifting motor 34 fixedly mounted on the support plate 2.

[0040] The grinding component further includes two symmetrically arranged grinding cylinders 36. The grinding cylinders 36 are fixedly mounted on the center frame 35. The extending end of the grinding cylinder 36 is fixedly connected to the mounting frame 37. The mounting frame 37 is fixedly connected to the grinding motor 38. The output shaft of the grinding motor 38 is connected to the grinding head 39. The center frame 35 is fixedly mounted on the bottom plate 1.

[0041] Two symmetrically arranged separating cylinders 40 are fixedly mounted on the bottom plate 1. The extending ends of the two separating cylinders 40 are respectively connected to the two support plates 2, and the support plate 2 is slidably engaged with the bottom plate 1.

[0042] Specifically, four rollers 42 are provided below each support plate 2. The rollers 42 are slidably mounted on a guide rail 41, and the guide rail 41 is mounted on the bottom plate 1. When the support plate 2 moves, the guide rail 41 guides the rollers 42, causing the rollers 42 to drive the support plate 2 to move, thereby reducing the moving resistance of the support plate 2.

[0043] Working principle: Since two bending mechanisms are symmetrically arranged in the present invention, during the bending process, two stainless steel pipes 43 to be processed can be bent simultaneously, thereby improving the bending efficiency. After the two stainless steel pipes 43 to be processed are bent, since the ends of the two stainless steel pipes 43 are symmetrically arranged, in order to ensure that the ends of the two symmetrically arranged stainless steel pipes 43 do not interfere, before processing, the distance between the two bending mechanisms needs to be adjusted according to the length of the stainless steel pipe 43. The bending mechanisms are mounted on two support plates 2, so adjusting the distance between the two support plates 2 can achieve this.

[0044] Specifically, when adjusting the distance between the two support plates 2, start the separation cylinder 40 connected to the support plate 2. The extending end of the separation cylinder 40 drives the support plate 2 to move. Four rollers 42 are connected below the support plate 2, and the rollers 42 are slidably engaged with the guide rail 41 fixedly mounted on the bottom plate 1. Therefore, during the movement of the support plate 2, the rollers 42 will move along the guide rail 41, thereby reducing the moving resistance of the support plate 2 and finally completing the adjustment of the distance between the support plates 2 and the distance between the two bending mechanisms.

[0045] After completing the adjustment of the distance between the two bending mechanisms, adjust the distance between the two rows of clamping wheels 4 on each lifting box 3 according to the diameter of the stainless steel pipe 43 to be processed (a moving block 5 is slidably mounted on the lifting box 3, and the moving block 5 is arranged along the long side direction of the lifting box 3, so the clamping wheels 4 on the two moving blocks 5 will be in two rows). Specifically, start the distance adjustment cylinder 11 fixedly mounted inside the lifting box 3, and the extending end of the distance adjustment cylinder 11 drives the connecting rod 10 to move. The connecting rod 10 drives the two driving columns 9 mounted on the connecting rod 10 to move; when the two driving columns 9 move to the right (such as Figure 5 、 Figure 6 viewpoint), the driving columns 9 will slide to the right along the inclined surface 8, so that the two wedge-shaped blocks 7 drive the two moving blocks 5 to approach each other. During this process, the return spring 6 is stretched, and the function of the return spring 6 is to assist the reset of the moving block 5; when the two driving columns 9 move to the left (such as Figure 5 、 Figure 6 viewpoint), the two moving blocks 5 move away from each other under the elastic force of the return spring 6. During the actual working process, the staff can adjust the distance between the two moving blocks 5 according to the diameter of the stainless steel pipe 43, thereby completing the adjustment of the distance between the two rows of clamping wheels 4.

[0046] When the distance adjustment between the two clamping wheels 4 is completed to meet the diameter of the stainless steel pipe 43, the vertical distance between the two lifting boxes 3 is adjusted according to the length of the stainless steel pipe 43. Specifically, the lifting motor 34 fixedly installed on the support plate 2 is started, so that the lifting lead screw 32 fixedly connected to the output shaft of the lifting motor 34 rotates. The lifting lead screw 32 is in threaded cooperation with the lifting block 31, and the lifting block 31 is fixedly connected to the lifting box 3. Therefore, during the rotation of the lifting lead screw 32, the two lifting blocks 31 will drive the two lifting boxes 3 to slide vertically along the lifting guide rod 33, so that the two lifting boxes 3 approach or move away from each other. If the distance between the second bending part 4302 and the third bending part 4303 needs to be larger, then the two lifting boxes 3 move away from each other. If the distance between the second bending part 4302 and the third bending part 4303 needs to be smaller, then the two lifting boxes 3 approach each other.

[0047] After the distance adjustment between the two lifting boxes 3 is completed, the processing of the stainless steel pipe 43 to be processed begins. First, one end of the stainless steel pipe 43 to be processed is extended between the two columns of clamping wheels 4 located below. According to the required length of the first bending part 4301, the distance extended between the two columns of clamping wheels 4 is controlled. It should be noted that the staff can adaptively adjust the distance extended between the two columns of clamping wheels 4 according to the length of the first bending part 4301 after forming. After adjusting the distance extended between the two columns of clamping wheels 4, the distance adjustment cylinder 11 is started, and the two moving blocks 5 are adjusted through the distance adjustment cylinder 11, that is, the distance between the clamping wheels 4 on the two moving blocks 5, so that the clamping wheels 4 clamp the stainless steel pipe 43 to be processed. Different from adjusting the distance between the clamping wheels 4 in the initial state, the purpose of this adjustment is to clamp the stainless steel pipe 43, so the adjustment range is smaller and the required time is shorter, which helps to improve the bending efficiency.

[0048] After the clamping wheel 4 clamps the stainless steel pipe 43 to be processed, the double-headed cylinder 15 is started, so that the two extending ends of the double-headed cylinder 15 drive the end connection block one 14 and the end bending cylinder 13 on the end connection block one 14 to move to a suitable height. At the same time, the extending end of the end bending cylinder 13 drives the end bending wheel 12 to move to a suitable position, and then the first bending of the stainless steel pipe 43 is started. At this time, the end bending motor 19 fixedly installed on the support plate 2 is started, so that the end bending motor 19 drives the horizontal lead screw 17 to rotate, so that the end connection block two 16 slides horizontally along the end guide rod 18. In this way, the lower end bending wheel 12 will contact the stainless steel pipe 43 to be processed, and the stainless steel pipe 43 cannot move due to the limitation of the clamping wheel 4. Therefore, the horizontally moving end bending wheel 12 will apply a horizontal force to the stainless steel pipe 43, so as to bend the part of the stainless steel pipe 43 extending outside the clamping wheel 4, and finally make the stainless steel pipe 43 with the first bending generate the first bending part 4301.

[0049] After the first bending is completed, according to the arc length requirements such as the final required second bending part 4302 and third bending part 4303, the distance between the two middle guide wheels 22 and the lifting box 3 is adjusted. Specifically, the distance between the cross bar 21 and the lifting box 3 is adjusted through the extending end of the middle cylinder one 20 fixedly installed inside the lifting box 3, so as to complete the adjustment of the position of the middle guide wheel 22. Then the middle cylinder two 44 is started, so that the middle cylinder two 44 drives the middle bending wheel 30 to extend to a suitable position. Then the middle motor two 29 is started, so that the middle motor two 29 drives the middle guide rod two 28 to rotate. Finally, the middle connection block 45 drives the middle cylinder two 44 and the middle bending wheel 30 to move to a suitable position away from the lower middle guide wheel 22, and then the second bending of the stainless steel pipe 43 is started, that is, the middle motor one 23 is started, so that the middle motor one 23 drives the middle lead screw one 24 to rotate. At this time, the moving table 26 slides upward along the middle guide rod one 25. Then the middle bending wheel 30 initially located below the stainless steel pipe 43 will move upward. Due to the limiting effect of the lower middle guide wheel 22, the stainless steel pipe 43 cannot move upward as a whole. Therefore, the upward moving middle bending wheel 30 will bend the stainless steel pipe 43 for the second time, so that the part of the stainless steel pipe 43 where the second bending part 4302 appears; after the middle bending wheel 30 moves to a suitable position away from the upper middle guide wheel 22, the middle motor one 23 stops moving. At the same time, the middle motor two 29 is started, so that the middle connection block 45 can drive the middle cylinder two 44 and the middle bending wheel 30 to move horizontally along with the rotation of the middle lead screw two 27 (in Figure 7The movement (based on the direction) enables the third bending of the stainless steel pipe 43, and the third bending part 4303 appears. At this time, the straight part above the stainless steel pipe 43 after the third bending is located between the two rows of clamping wheels 4. After the third bending is completed, the end bending motor 19 drives the horizontal lead screw 17 to rotate again, so that the second end connection block 16 slides horizontally along the end guide rod 18, and finally the fourth bending of the stainless steel pipe 43 is completed by the end bending wheel 12, that is, the fourth bending part 4304 appears on the stainless steel pipe 43.

[0050] After the four bends of the stainless steel pipe 43 to be processed are completed, the ends of the two stainless steel pipes 43 are polished. Specifically, the polishing cylinder 36 is started, and the extending end of the polishing cylinder 36 drives the mounting frame 37, the polishing motor 38 and the polishing head 39 to move, so that the polishing head 39 contacts the end of the stainless steel pipe 43. Then the polishing motor 38 is started, and the output shaft of the polishing motor 38 drives the polishing head 39 to rotate, so that the polishing head 39 completes the polishing of the end of the stainless steel pipe 43.

[0051] After the polishing is completed, the bent stainless steel pipe 43 can be removed. It should be noted that since the stainless steel pipe 43 is in a bent state after bending, the distance between the two rows of clamping wheels 4 needs to be increased and the distance between the two lifting boxes 3 needs to be reduced, so as to facilitate the removal of the bent stainless steel pipe 43.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as above. For the sake of brevity, they are not provided in detail; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stainless steel pipe bending device, comprising a bottom plate, characterized in that: A bending mechanism and a grinding mechanism are arranged above the bottom plate; There are two bending mechanisms, which are symmetrically arranged on both sides of the grinding mechanism. The bending mechanisms include an end bending assembly and a middle bending assembly, which are used to perform bending processing on the stainless steel pipe; The grinding mechanism includes two symmetrically arranged grinding components, and the grinding components include two symmetrically arranged grinding heads, and the grinding heads are used to grind the ends of the stainless steel pipe to facilitate the use of the stainless steel pipe after bending; The end bending assembly comprises two symmetrically arranged end bending wheels, the end bending wheels are fixedly connected to the extended ends of the end bending cylinders, the end bending cylinders are mounted on end connection block 1, the two end connection blocks 1 are respectively mounted on the two extended ends of the double-headed cylinders, the double-headed cylinders are fixedly connected to end connection block 2, and the end connection block 2 is connected to the horizontal moving assembly; when the stainless steel pipe is bent, the two end bending wheels are used to bend the ends of the stainless steel pipes so as to generate the first bending portion and the fourth bending portion on the stainless steel pipes; The middle bending assembly includes two symmetrically arranged middle guide wheels, which are installed on a cross bar. The two cross bars are respectively connected to the protruding ends of two middle cylinders, and the two middle cylinders are respectively fixedly installed inside two lifting boxes; when the stainless steel pipe is bent, the two middle guide wheels are used to bend the middle part of the stainless steel pipe to produce a second bend and a third bend on the stainless steel pipe.

2. A stainless steel pipe bending device as claimed in claim 1, characterized in that: The middle bending assembly also includes a middle bending wheel, which is fixedly connected to the protruding end of the separation cylinder, and the separation cylinder is connected to the middle connecting block. The middle connecting block is connected to a middle lead screw 2 and a middle guide rod 2. The middle lead screw 2 is threadedly matched with the middle connecting block and is fixedly connected to the output shaft of the middle motor 2 fixedly mounted on the moving platform. The middle guide rod 2 is fixedly mounted on the moving platform, and the moving platform is connected to the vertical moving assembly.

3. A stainless steel pipe bending device as claimed in claim 2, characterized in that: The two lifting boxes are symmetrically arranged, and two symmetrically arranged moving blocks are slidably installed on the lifting boxes. A return spring is arranged between the moving blocks and the lifting boxes. A plurality of clamping wheels for bending are rotatably installed on the moving blocks. The moving blocks are connected to the distance adjusting components, and the distance adjusting components are used to adjust the distance between the two moving blocks; when the stainless steel pipe is bent, the clamping wheels on the two symmetrically arranged moving blocks are used to fix the stainless steel pipe.

4. A stainless steel pipe bending device as claimed in claim 3, characterized in that: The distance adjustment component includes two symmetrically arranged wedge blocks, and the two wedge blocks are respectively fixedly mounted on two moving blocks. The wedge blocks are provided with inclined surfaces, and the inclined surfaces are slidably matched with the driving columns. The two driving columns are fixedly mounted on the connecting rod, and the connecting rod is fixedly connected to the protruding end of the distance adjustment cylinder. The distance adjustment cylinder is fixedly mounted inside the lifting box.

5. A stainless steel pipe bending device as claimed in claim 4, characterized in that: A lifting block is fixedly installed on each of the two lifting boxes, the lifting block is threadedly matched with the lifting screw, the lifting block is slidingly matched with the lifting guide rod, the lifting screw is rotatably installed on the support plate, the lifting guide rod is fixedly installed on the support plate, and the lifting screw is fixedly connected to the output shaft of the lifting motor fixedly installed on the support plate.

6. A stainless steel pipe bending device as claimed in claim 5, characterized in that: The grinding assembly also includes two symmetrically arranged grinding cylinders, which are fixedly mounted on a center frame, the protruding ends of the grinding cylinders are fixedly connected to a mounting frame, the mounting frame is fixedly connected to a grinding motor, the output shaft of the grinding motor is connected to a grinding head, and the center frame is fixedly mounted on a base plate.

7. A stainless steel pipe bending device as claimed in claim 6, characterized in that: Two symmetrically arranged separation cylinders are fixedly mounted on the bottom plate, and the protruding ends of the two separation cylinders are respectively connected to two support plates, and the support plates are slidably matched with the bottom plate.

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