Bent pipe end high-precision automatic measuring and shaping equipment

Abstract

The invention belongs to the field of bent pipe manufacturing, particularly relates to high-precision automatic measuring and shaping equipment for bent pipe ends, and aims to solve the problems of high labor intensity, low control precision, poor appearance shape after shaping, low production efficiency, incapability of reducing and shaping bent pipe ends with relatively large diameters and risk of personal injury in an existing mode. The device comprises a support, a rotating device, a roundness measuring device, a shaping device and a driving device. The support is fixed to the ground and rotationally connected with the rotating device. The rotating device is in driving connection with the driving device; the roundness measuring device is detachably fixed to the support and used for detecting the geometrical shape of the bent pipe. The shaping device comprises a shaping die, the shaping die is connected with the rotating device, the shaping die is attached to the outer circumferential face of the bent pipe, and the shaping die is used for adjusting the size of the pipe end of the bent pipe. The single shaping time of the single head of the pipe end does not exceed 20 minutes, so that the production efficiency is greatly improved, and the labor intensity of workers and the safety risk in the shaping process are reduced.

Description

Technical Field

[0001] The invention belongs to the field of bent pipe manufacturing, and in particular relates to high-precision automatic measurement and shaping equipment for bent pipe ends. Background Art

[0002] In the process of pipe bending, the steel pipe body becomes the pipe end of the pipe after cutting. Since the steel pipe body has low requirements on appearance, roundness and outer diameter, when it is used as the pipe end of the pipe, the requirements on appearance, roundness and outer diameter are higher. At the same time, in the process of pipe bending, the roundness of the pipe end changes greatly due to the bending force. Therefore, after the pipe is bent, it is necessary to perform finishing work such as shaping, roundness calibration and sizing on the pipe end to improve the roundness, outer diameter and appearance of the pipe end, so as to facilitate the later pipe end groove processing and on-site girth welding.

[0003] In the traditional pipe end shaping process, a hydraulic jack is placed about 200mm inside the pipe end. The jack is used to pressurize and lift the short axis of the ellipse at the pipe end, thereby shortening the long axis of the ellipse under tension and achieving the pipe end shaping process. However, due to local force during the shaping process, stress concentration is relatively serious, which often leads to creases or bulges at the ejection site, and the arc of the tensile site is flattened without curvature. Moreover, the deformation of the shaping is controlled only by the pressure of the jack, and the control accuracy is low. It requires multiple and gradual corrections to complete the rounding of the pipe end.

[0004] This pipe end shaping method has high labor intensity, low control accuracy, poor appearance after shaping, low production efficiency, and cannot reduce the diameter of the pipe ends with large diameters. In addition, upper and lower pads are required to protect the inner wall of the pipe during the shaping process. During the pressurization process, the pads are prone to flying out, causing the risk of personal injury.

[0005] Based on this, the present invention proposes a high-precision automatic measurement and shaping device for bent pipe ends. Summary of the invention

[0006] In order to solve the above problems in the prior art, namely, the existing method has high labor intensity, low control accuracy, poor appearance after shaping, low production efficiency, and the pipe end of the bent pipe with a large diameter cannot be reduced and shaped, causing the risk of personal injury, the present invention provides a high-precision automatic measurement and shaping device for the pipe end of the bent pipe, which includes a bracket, a rotating device, a circle measuring device, a shaping device and a driving device;

[0007] The bracket is fixed to the ground, the bracket is rotatably connected to the rotating device; the rotating device is drivingly connected to the driving device;

[0008] The circle measuring device is detachably fixed to the bracket, and the circle measuring device is used to detect the geometric shape of the bent pipe;

[0009] The shaping device comprises a shaping die, the shaping die is connected to the rotating device, the shaping die is fitted with the outer circumferential surface of the bent pipe, and the shaping die is used to adjust the size of the end of the bent pipe.

[0010] In some preferred embodiments, the support includes a rotating support and a bent pipe support both fixed to the ground;

[0011] The rotating bracket is used to support the rotating device; the bent pipe bracket is used to support the bent pipe, and at least one group of bent pipe brackets are evenly arranged along the axial direction of the bent pipe;

[0012] The rotating bracket includes a first circular ring and a supporting rod; the supporting rod is fixed to the ground, the first circular ring is fixed to the supporting rod, and the first circular ring is used to support the rotating device.

[0013] In some preferred embodiments, the rotating device includes a gear and a gear ring;

[0014] The gear is drivingly connected to the driving device, the gear is installed on the support rod through a bearing, the gear is meshed with the gear ring, one end face of the gear ring is installed on the first ring through a bearing, and the other end face of the gear ring is fixed to the shaping device.

[0015] In some preferred embodiments, the circle measuring device includes a laser detection head, which is detachably fixed to the first circular ring, and the laser detection head is used to detect the geometric shape of the inner wall of the bent pipe end.

[0016] In some preferred embodiments, the driving device comprises a rotary motor;

[0017] The rotating motor is fixed to the supporting rod, and the output shaft of the rotating motor is coaxially fixed to the gear.

[0018] In some preferred embodiments, the shaping device includes a support plate, a hydraulic cylinder, a telescopic rod, a slider and a guide rod;

[0019] The support plate is fixed to the other end surface of the gear ring, the support plate is fixed to the hydraulic cylinder, the telescopic rod of the hydraulic cylinder is fixed to the slider, the slider moves along the guide rod, and the guide rod is fixed to the support plate;

[0020] The slider is fixed to the shaping die, and the shaping die is arranged outside the bent pipe and is used to adjust the geometric shape of the pipe end of the bent pipe.

[0021] In some preferred embodiments, the shaping mold includes a first section, a second section, and a third section fixed in sequence;

[0022] The first section and the third section are straight line sections, and the second section is an arc section; a plurality of shaping dies are arranged between the slider and the bent pipe, and the plurality of shaping dies are detachably fixed in sequence, and the diameters of the second sections of the plurality of shaping dies decrease in sequence from the hydraulic cylinder to the bent pipe;

[0023] The plurality of shaping dies are symmetrically arranged in two groups along the center of the curved pipe end.

[0024] In some preferred embodiments, the guide rods are symmetrically arranged in two groups along the midline of the support plate in the height direction.

[0025] In some preferred embodiments, the hydraulic cylinder is connected to the hydraulic station, the hydraulic station is fixed to the ground, and the hydraulic station is used to provide power for the hydraulic cylinder.

[0026] In some preferred embodiments, the support plates are symmetrically arranged in two groups along the center of the curved pipe end, and the symmetrically arranged support plates are fixed to the symmetrically arranged shaping molds.

[0027] Beneficial effects of the present invention:

[0028] Through the automatic measuring device and computer control system, the oil cylinder ejection position and pressure data of different specifications of pipe bending products are measured and recorded, and this is used as the control basis for the shaping of the pipe ends of the pipes with outer diameters of 508-1422mm to achieve rounding, shaping, and sizing of the pipe ends of the pipes with outer diameters of 508-1422mm, and improve the dimensional accuracy and quality of the pipe ends. After shaping, within the range of 150mm of the pipe ends of the pipes, the maximum diameter and the minimum diameter are within 3mm, and there are no obvious appearance defects on the pipe ends. The shaping time of a single head and a single time of the pipe end does not exceed 20 minutes, which greatly improves production efficiency and reduces the labor intensity of workers and safety risks during the shaping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1 This is a first-perspective axonometric diagram of a device for high-precision automatic measurement and shaping of bent pipe ends of the present invention;

[0031] Figure 2 It is a second-angle axonometric diagram of a high-precision automatic measurement and shaping device for bent pipe ends of the present invention. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] See also Figure 1 , Figure 2 As shown, the present invention provides a high-precision automatic measurement and shaping device for bent pipe ends, the device comprising a bracket, a rotating device, a circle measuring device, a shaping device and a driving device;

[0035] The bracket is fixed to the ground, the bracket is rotatably connected to the rotating device; the rotating device is drivingly connected to the driving device;

[0036] The circle measuring device is detachably fixed to the bracket, and the circle measuring device is used to detect the geometric shape of the bent pipe 100;

[0037] The shaping device includes a shaping die 110 , which is connected to the rotating device. The shaping die 110 fits the outer circumferential surface of the bent pipe 100 , and is used to adjust the size of the end of the bent pipe 100 .

[0038] For further explanation of the present invention, see Figure 1 , the support comprises a rotating support 101 and a bent pipe support 103 both of which are fixed to the ground;

[0039] The rotating bracket 101 is used to support the rotating device; the bent pipe bracket 103 is used to support the bent pipe 100, and at least one group of the bent pipe brackets 103 is evenly arranged along the axial direction of the bent pipe 100;

[0040] The rotating bracket 101 includes a first circular ring 117 and a support rod 118; the support rod 118 is fixed to the ground, the first circular ring 117 is fixed to the support rod 118, and the first circular ring 117 is used to support the rotating device.

[0041] For further explanation of the present invention, see Figure 1 , the rotating device includes a gear 104 and a ring gear 105;

[0042] The gear 104 is drivingly connected to the driving device, the gear 104 is installed on the support rod 118 through a bearing, the gear 104 is meshed with the ring gear 105, one end face of the ring gear 105 is installed on the first ring 117 through a bearing, and the other end face of the ring gear 105 is fixed to the shaping device.

[0043] For further explanation of the present invention, see Figure 1 The circle measuring device includes a laser detection head 106 , and the laser detection head 106 is detachably fixed to the first circular ring 117 . The laser detection head 106 is used to detect the geometric shape of the inner wall of the end of the bent pipe 100 .

[0044] For further explanation of the present invention, see Figure 1 , the driving device includes a rotating motor 108;

[0045] The rotary motor 108 is fixed to the support rod 118 , and the output shaft of the rotary motor 108 is coaxially fixed to the gear 104 .

[0046] For further explanation of the present invention, see Figure 1 , Figure 2 , the shaping device includes a support plate 102, a hydraulic cylinder 107, a telescopic rod 109, a slider 111 and a guide rod 112;

[0047] The support plate 102 is fixed to the other end surface of the gear ring 105, the support plate 102 is fixed to the hydraulic cylinder 107, the telescopic rod 109 of the hydraulic cylinder 107 is fixed to the slider 111, the slider 111 moves along the guide rod 112, and the guide rod 112 is fixed to the support plate 102;

[0048] The slider 111 is fixed to the shaping die 110 . The shaping die 110 is arranged outside the bent pipe 100 and is used to adjust the geometric shape of the pipe end of the bent pipe 100 .

[0049] The rotation of the gear ring 105 drives the support plate 102 to rotate, and the support plate 102 drives the hydraulic cylinder 107, the telescopic rod 109, the sliding block 111, the guide rod 112 and the shaping mold 110 to rotate as a whole.

[0050] For further explanation of the present invention, see Figure 2 The shaping mold 110 includes a first section 113, a second section 114 and a third section 115 which are fixed in sequence;

[0051] The first section 113 and the third section 115 are straight sections, and the second section 114 is an arc section; a plurality of shaping dies 110 are arranged between the slider 111 and the bent pipe 100, and the plurality of shaping dies 110 are detachably fixed to each other in sequence, and the diameters of the second sections 114 of the plurality of shaping dies 110 decrease in sequence from the hydraulic cylinder 107 to the bent pipe 100;

[0052] The plurality of shaping dies 110 are symmetrically arranged in two groups along the center of the end of the bent pipe 100 .

[0053] For further explanation of the present invention, see Figure 2 The guide rods 112 are symmetrically arranged in two groups along the midline of the support plate 102 in the height direction.

[0054] For further explanation of the present invention, see Figure 1 The hydraulic cylinder 107 is connected to the hydraulic station 116 , the hydraulic station 116 is fixed to the ground, and the hydraulic station 116 is used to provide power for the hydraulic cylinder 107 .

[0055] For further explanation of the present invention, see Figure 2 The support plates 102 are symmetrically arranged in two groups along the center of the end of the bent pipe 100 , and the symmetrically arranged support plates 102 are fixed to the symmetrically arranged shaping mold 110 .

[0056] The present invention, when used, comprises the following steps:

[0057] Step S1, stably placing the bent pipe 100 to be shaped on the bent pipe support 103, and adjusting the bent pipe support 103 to a suitable height so that the end of the bent pipe 100 is placed in the middle of the shaping mold 110;

[0058] Step S2: Use the laser detection head 106 to perform circumferential scanning measurement on the inner wall within 150 mm of the end of the bent pipe 100. Collect one data every 1 / 6 degree of the end of the bent pipe 100, and collect 2160 data in total, and transmit the scanned and measured data to the computer. The computer system fits the geometric shape of the inner wall of the end of the bent pipe 100, analyzes the ovality of the end of the bent pipe 100, including the major diameter and minor diameter values ​​and marks their positions;

[0059] Step S3, remove the laser detection head 106, and control the motor through the computer control system to drive the rotating device to adjust the shaping mold 110 to the position where the pipe end has the largest diameter or the position that needs shaping;

[0060] Step S4, driving the shaping die 110 by the hydraulic cylinder 107 to shape the position of the pipe end with a larger diameter or the position with a defective appearance of the pipe; according to the measured roundness of the pipe end, referring to the oil pressure of the hydraulic station 116, controlling the pressing amount of the shaping die 110 to achieve the shaping effect of the pipe end; if the outer diameter of the bent pipe is larger as a whole, the pressing amount of the die can be appropriately increased to achieve the effect of reducing the diameter of the pipe end;

[0061] Step S5, reinstall the laser detection head 106, perform circumferential scanning measurement on the end of the bent pipe 100, fit the inner wall geometry of the end of the bent pipe 100, analyze the ovality of the end of the pipe, including the major diameter and minor diameter values ​​and mark their positions;

[0062] Step S6, for the position with poor roundness, the shaping mold 110 is adjusted by the rotating device to reshape, and the roundness is measured to finally achieve the roundness of the tube end. Finally, the computer control system stores the complete shaping record and results into the system as the control parameter for the next shaping to improve the shaping efficiency.

[0063] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.

[0064] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0065] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A high-precision automatic measurement and shaping device for bent pipe ends. It is characterized in that The device includes a support, a rotating device, a circle measuring device, a shaping device and a driving device; The bracket is fixed to the ground, the bracket is rotatably connected to the rotating device; the rotating device is drivingly connected to the driving device; The circle measuring device is detachably fixed to the bracket, and the circle measuring device is used to detect the geometric shape of the bent pipe (100); The shaping device comprises a shaping die (110), the shaping die (110) is connected to the rotating device, the shaping die (110) is fitted with the outer circumferential surface of the bent pipe (100), and the shaping die (110) is used to adjust the size of the pipe end of the bent pipe (100).

2. According to claim 1, a high-precision automatic measurement and shaping device for bent pipe ends, It is characterized in that The support comprises a rotating support (101) and a curved pipe support (103) both of which are fixed to the ground; The rotating bracket (101) is used to support the rotating device; the bent pipe bracket (103) is used to support the bent pipe (100), and at least one group of the bent pipe brackets (103) is evenly arranged along the axial direction of the bent pipe (100); The rotating bracket (101) comprises a first circular ring (117) and a support rod (118); the support rod (118) is fixed to the ground, the first circular ring (117) is fixed to the support rod (118), and the first circular ring (117) is used to support the rotating device.

3. According to claim 2, a high-precision automatic measurement and shaping device for bent pipe ends, It is characterized in that The rotating device comprises a gear (104) and a gear ring (105); The gear (104) is drivingly connected to the driving device, the gear (104) is mounted on the support rod (118) via a bearing, the gear (104) is meshed with the gear ring (105), one end face of the gear ring (105) is mounted on the first ring (117) via a bearing, and the other end face of the gear ring (105) is fixed to the shaping device.

4. According to claim 3, a high-precision automatic measurement and shaping device for bent pipe ends, It is characterized in that The circle measuring device comprises a laser detection head (106), the laser detection head (106) and the first circular ring (117) are detachably fixed, and the laser detection head (106) is used to detect the geometric shape of the inner wall of the pipe end of the bent pipe (100).

5. According to claim 4, a high-precision automatic measurement and shaping device for bent pipe ends, It is characterized in that The driving device comprises a rotating motor (108); The rotating motor (108) is fixed to the supporting rod (118), and the output shaft of the rotating motor (108) is coaxially fixed to the gear (104).

6. The high-precision automatic measurement and shaping device for bent pipe ends according to claim 5, It is characterized in that The shaping device comprises a support plate (102), a hydraulic cylinder (107), a telescopic rod (109), a sliding block (111) and a guide rod (112); The support plate (102) is fixed to the other end surface of the gear ring (105), the support plate (102) is fixed to the hydraulic cylinder (107), the telescopic rod (109) of the hydraulic cylinder (107) is fixed to the slider (111), the slider (111) moves along the guide rod (112), and the guide rod (112) is fixed to the support plate (102); The slider (111) is fixed to the shaping die (110); the shaping die (110) is arranged outside the bent pipe (100) and is used to adjust the geometric shape of the pipe end of the bent pipe (100).

7. The high-precision automatic measurement and shaping device for bent pipe ends according to claim 6, It is characterized in that The shaping mold (110) comprises a first section (113), a second section (114) and a third section (115) which are fixed in sequence; The first section (113) and the third section (115) are straight sections, and the second section (114) is an arc section; a plurality of shaping dies (110) are arranged between the slider (111) and the bent pipe (100), and the plurality of shaping dies (110) are detachably fixed to each other in sequence, and the diameters of the second sections (114) of the plurality of shaping dies (110) decrease in sequence from the hydraulic cylinder (107) to the bent pipe (100); The plurality of shaping dies (110) are symmetrically arranged in two groups along the center of the tube end of the bent tube (100).

8. The high-precision automatic measurement and shaping device for bent pipe ends according to claim 7, It is characterized in that The guide rods (112) are symmetrically arranged in two groups along the midline of the support plate (102) in the height direction.

9. The high-precision automatic measurement and shaping device for bent pipe ends according to claim 8, It is characterized in that The hydraulic cylinder (107) is connected to the hydraulic station (116), the hydraulic station (116) is fixed to the ground, and the hydraulic station (116) is used to provide power for the hydraulic cylinder (107).

10. The high-precision automatic measurement and shaping device for bent pipe ends according to claim 9, It is characterized in that Two groups of the support plates (102) are symmetrically arranged along the center of the tube end of the bent tube (100), and the symmetrically arranged support plates (102) are fixed to the symmetrically arranged shaping molds (110).

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