Forging and pressing device for flange machining and forging and pressing method

Abstract

The invention relates to the technical field of flange machining, and particularly discloses a forging and pressing device for flange machining and a forging and pressing method.The forging and pressing device comprises a main frame, the top end of the front side of the main frame is provided with a front-back penetrating moving groove in the vertical direction, and the bottom end of the front side of the main frame is provided with a first sliding groove in the vertical direction; second sliding grooves are formed in the left side and the right side of the bottom end of the front side of the main frame in the vertical direction. The device can monitor the concentricity of the ring rolling roller and the core roller in real time, avoids the defects of inconsistent acting force directions, non-uniform blank deformation, dimensional deviation, shape distortion and the like, improves the dimensional precision and the shape precision of the flange, reduces the defects of surface cracks, scratches or indentations and the like, improves the appearance quality and the use performance of a workpiece, and meanwhile, improves the production efficiency. The outer diameter change can be accurately controlled, the rate of unqualified products is reduced, it is ensured that follow-up machining steps are smoothly carried out, meanwhile, the production automation level and the intelligent level are promoted to be improved, and the production cost and the labor intensity are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of flange processing, in particular to a forging device and a forging method for flange processing. Background Art

[0002] Flanges, as key components connecting pipes and equipment, play a vital role in industrial production. They not only need to withstand high pressure, high temperature and corrosion from various media, but also need to ensure the tightness and sealing of the connection. Therefore, the manufacturing quality of flanges is directly related to the safety and stable operation of the entire system.

[0003] In order to meet high-standard manufacturing requirements, forging is often used in the processing of flanges. Forging applies pressure to the metal blank to cause it to undergo plastic deformation, thereby obtaining the required shape, size, and performance. Compared with other processing methods, forging can significantly improve the density, mechanical properties, and corrosion resistance of the flange, and is an important means of producing high-quality flanges.

[0004] In the flange forging process, the ring rolling machine is one of the key equipment. Its working principle is to gradually extrude and expand the ring blank through the coordinated action of the core roller and the ring rolling roller to achieve the desired hole size. In this process, the concentricity of the core roller and the ring rolling roller is very important. The precise maintenance of concentricity can ensure the uniformity of the force direction during the hole expansion process, thereby avoiding problems such as uneven deformation, dimensional deviation, and shape distortion of the ring blank.

[0005] However, the ring rolling machine in the prior art faces many challenges during use. First, the ring rolling roller and the core roller of the ring rolling machine may cause position deviation due to temperature, equipment aging and hydraulic system stability, which seriously affects the concentricity of the core roller and the ring rolling roller. The traditional ring rolling machine cannot monitor the concentricity of the ring rolling roller and the core roller in real time during use. If the ring rolling roller and the core roller with deviation in position are continuously used to forge and roll the flange, the force direction will be inconsistent and the blank will be deformed unevenly, which not only reduces the processing accuracy, but also may cause defects such as ellipse and eccentricity, seriously affecting the dimensional accuracy and shape accuracy of the flange. More seriously, due to the inconsistent force direction, local stress concentration may occur in the ring blank during the extrusion process, resulting in defects such as surface cracks, scratches or indentations. These defects not only damage the appearance quality of the workpiece, but also may significantly reduce its performance and life, posing a threat to the overall quality of the product.

[0006] In addition, when the ring rolling machine is in use, it mainly relies on preset mechanical parameters and operating experience to control the expansion size, and it is difficult to feedback the actual outer diameter changes of the blank in real time, which makes it difficult to ensure the accuracy of the product size. There may be excessive dimensional deviation and increased defective product rate. At the same time, the inaccurate outer diameter control may also trigger a chain reaction in subsequent processing steps. For example, welding, assembly and other links will increase the difficulty of adjustment due to size mismatch, and even lead to the interruption of the entire production process or the decline of product performance. What is more serious is that long-term reliance on manual judgment and experience adjustment not only increases production costs and labor intensity, but also limits the improvement of production automation and intelligent levels. Summary of the Invention

[0007] The purpose of the present invention is to provide a forging device and a forging method for flange processing, so as to solve the problem in the prior art that the concentricity of the ring roller and the core roller cannot be monitored and the outer diameter of the forged blank cannot be monitored.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a forging device and forging method for flange processing, comprising: a main frame, a front top end of the main frame is provided with a movable groove running through the front and back in the up-down direction, a front bottom end of the main frame is provided with a first slide groove in the up-down direction, a front bottom end of the main frame is provided with a second slide groove on both sides in the up-down direction, the two second slide grooves are respectively located on the left and right sides of the first slide groove, a plurality of slots are provided on both sides of the inner cavity of the second slide groove at equal distances in the up-down direction, and the rear side of the main frame is provided with two second slide grooves in the left and right directions. Three slide grooves, two third slide grooves are respectively located on the upper and lower sides of the moving groove, and two fourth slide grooves are opened on the rear side of the main frame along the left and right directions; the concentricity monitoring mechanism is arranged on the rear side of the main frame; the outer diameter monitoring mechanism, the outer diameter monitoring mechanism is arranged in the inner cavity of the first slide groove; the number of limit blocks is two, and the two limit blocks are respectively arranged on the left and right sides of the inner cavity of the moving groove; the moving block can be slidably adapted to be inserted into the inner cavity of the moving groove, and the left and right sides of the moving block are provided with limit grooves along the up and down directions, and the limit block can be slidably adapted to be inserted into the inner cavity of the limit groove; the first The hydraulic cylinder is arranged at the top of the main frame, the bottom end of the first hydraulic cylinder can slide into the inner cavity of the moving groove, and the bottom end of the first hydraulic cylinder is arranged at the top of the moving block; the middle part of the outer wall of the rotating rod is rotatably arranged in the inner cavity of the moving block through a bearing, and the front and rear ends of the rotating rod can rotatably extend out of the front and rear sides of the moving block respectively; the rolling roller is sleeved on the front side of the outer wall of the rotating rod and locked; the motor screw is connected to the rear side of the moving block, and the rear end of the rotating rod is locked to the output end of the motor through a coupling; the number of the second hydraulic cylinder is two, and the two second hydraulic cylinders The top end is rotatably set at the left and right ends of the front side of the main frame through a pin shaft; there are two guide roller frames, which are rotatably set at the left and right ends of the front side of the main frame through a pin shaft, and the bottom end of the second hydraulic cylinder is rotatably set at the top of the guide roller frame through a pin shaft; the guide roller is rotatably set at the bottom end of the guide roller frame; the core roller is rotatably set at the middle of the front side of the main frame through a bearing, and the rear end of the core roller is rotatably extended out of the rear side of the main frame; the warning light is set at the top of the main frame; the first scale line, the first scale line is set on the front side of the main frame.

[0009] Preferably, in order to monitor the outer diameter of the flange blank, the outer diameter monitoring mechanism includes: a first guide rod, the upper and lower ends of the first guide rod are respectively arranged on the upper and lower sides of the inner cavity of the first slide groove; the first slider is slidably adapted to be inserted into the inner cavity of the first slide groove, and the first slider is slidably sleeved on the outer wall of the first guide rod; the fourth spring is sleeved on the bottom end of the outer wall of the first guide rod, the top end of the fourth spring is clamped on the bottom end of the first slider, and the bottom end of the fourth spring is clamped on the bottom end of the inner cavity of the first slide groove; the rear side of the support frame is arranged on the front side of the first slider; the roller is rotatably arranged on the top end of the support frame; the number of second baffles is two, and the two second baffles are respectively arranged on the left and right sides of the support frame, and the position of the first scale line corresponds to the position of the second baffle; the third contact is arranged at the top end of the second baffle.

[0010] Preferably, in order to position the support frame, the outer diameter monitoring mechanism also includes: a second guide rod, the upper and lower ends of the second guide rod are respectively arranged on the upper and lower sides of the inner cavity of the second slide groove; the second slider is slidably adapted to be inserted into the inner cavity of the second slide groove, the second slider is slidably sleeved on the outer wall of the second guide rod, and extrusion grooves are provided on the left and right sides of the second slider; the fifth spring is embedded in the inner cavity of the extrusion groove, and one end of the fifth spring is clamped to the inner side of the inner cavity of the extrusion groove; a part of the card ball is embedded in the inner cavity of the extrusion groove, and the other part of the card ball is adapted to extend into the inner cavity of the card groove corresponding to its position, and the other end of the fifth spring is clamped to the outer wall of the card ball; the first baffle is arranged on the front side of the second slider, and the bottom ends of the two first baffles are respectively in contact with the top ends of the two second baffles; the second contact is arranged at the bottom end of the first baffle, and the two second contacts are respectively in contact with the two third contacts.

[0011] Preferably, the length of the card ball extending into the inner cavity of the card slot is smaller than its radius.

[0012] Preferably, in order to monitor whether the position of the ring rolling roller is deflected, the concentricity monitoring mechanism includes: a third guide rod, the left and right ends of the third guide rod are respectively arranged on the left and right sides of the inner cavity of the third slide groove; the third slider is slidably adapted and plugged into the middle of the inner cavity of the third slide groove, and the third slider is slidably sleeved on the middle of the outer wall of the third guide rod; the number of first springs is four, the four first springs are respectively sleeved on the left and right sides of the outer walls of the two third guide rods, one end of the four first springs is respectively clamped on the left and right sides of the inner cavity of the two third slide grooves, and the other ends of the four first springs are respectively clamped on the left and right sides of the two third sliders; the first support plate is arranged on the rear side of the third slider; the number of first blocking rods is two, and the upper and lower ends of the two first blocking rods are respectively arranged on the left and right sides of the inner sides of the two first support plates At the right two ends, the rear end of the outer wall of the rotating rod is located between the two first blocking rods, and the outer wall of the rotating rod is in contact with the outer wall of the first blocking rod; the extrusion cylinder is arranged in the middle of the top end of the first support plate located below, and the left and right sides of the inner cavity of the extrusion cylinder are provided with limiting slide grooves in the up and down directions; the limiting slider can be slidably adapted and inserted into the bottom end of the inner cavity of the limiting slide groove; the left and right sides of the ball seat are respectively arranged on the inner side of the two limiting sliders, the ball seat is a conductor, and the ball seat and the warning light are electrically connected; the second spring is embedded in the top end of the inner cavity of the extrusion cylinder, the top end of the second spring is clamped to the top end of the inner cavity of the extrusion cylinder, and the bottom end of the second spring is clamped to the top end of the ball seat; the ball can be rolled and adapted to be embedded in the inner cavity of the ball seat, and the bottom end of the ball can be rolled to extend out of the bottom end of the first support plate, and the ball is a conductor.

[0013] and a control button located on the top of the control button, on the left and right sides of the control button, on the right and left sides of the control button, and on the left and right sides of the control button, respectively. The second scale line is set on the rear side of the second support plate located above; there are four fifth sliders, and the four fifth sliders are slidably adapted and inserted into the left and right sides of the inner cavity of the two fifth slides, and the fifth slider is slidably sleeved on the outer wall of the fifth guide rod; there are two wedge-shaped insulating blocks, and the front and rear sides of the bottom ends of the two wedge-shaped insulating blocks are respectively arranged on the top of the four fifth sliders, and the two wedge-shaped insulating blocks are arranged opposite to each other; the right end of the positive and negative thread screw is rotatably set on the right side of the inner cavity of the sixth slide through a bearing, and the left end of the positive and negative thread screw is rotatable and extends out of the left side of the second support plate; there are two sixth sliders, and the two sixth sliders are respectively set on the rear sides of the two wedge-shaped insulating blocks, and the sixth slider is slidably adapted and inserted into the inner cavity of the sixth slide, and the sixth slider is screwed to the outer wall of the positive and negative thread screw; there are two second blocking rods, and the upper and lower ends of the two second blocking rods are respectively arranged on the left and right ends of the inner sides of the two second support plates, and the rear end of the outer wall of the core roller is located between the two second blocking rods, and the outer wall of the core roller contacts the outer wall of the second blocking rod.

[0014] Preferably, the length of the rolling ball embedded in the inner cavity of the rolling ball seat is greater than its radius.

[0015] The present invention provides a forging device and a forging method for flange processing, which have the following beneficial effects:

[0016] 1. The present invention utilizes a core roller to support the flange blank, utilizes a second hydraulic cylinder, a guide roller frame and a guide roller to ensure the stability of the flange blank, utilizes a first hydraulic cylinder to push a moving block to drive the ring rolling roller to move downward to apply an extrusion force to the flange blank, utilizes a motor to drive the ring rolling roller to rotate through a rotating rod, thereby expanding the flange blank.

[0017] 2. The present invention utilizes the first blocking rod to monitor whether the ring rolling roller is in a positional deviation, and utilizes the second blocking rod to monitor whether the core roller is in a positional deviation. When the position of the ring rolling roller or the core roller is in a positional deviation, the ball will be urged to roll to the top of the wedge-shaped insulating block, thereby urging the ball to separate from the first contact point, causing the warning light to turn off, and thus reminding the staff to perform maintenance.

[0018] 3. The present invention utilizes a roller to monitor the outer diameter of the flange blank. When the outer diameter of the flange blank contacts the roller, the roller is squeezed to move downward, thereby causing the second contact and the third contact to separate. At this time, the motor can be turned off.

[0019] 4. This device can monitor the concentricity of the ring rolling roller and the core roller in real time, avoiding inconsistent force directions, avoiding defects such as uneven deformation of the blank, dimensional deviation and shape distortion, improving the dimensional accuracy and shape accuracy of the flange, reducing the occurrence of surface defects such as cracks, scratches or indentations, and improving the appearance quality and performance of the workpiece. At the same time, it can achieve precise control of the outer diameter change, reduce the defective product rate, ensure the smooth progress of subsequent processing steps, and promote the improvement of production automation and intelligence levels, reducing production costs and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a structural diagram of the concentricity monitoring mechanism;

[0022] Figure 3 This is an exploded view of the concentricity monitoring mechanism;

[0023] Figure 4 is a front cross-sectional view of the first support plate;

[0024] Figure 5 An exploded view of the present invention;

[0025] Figure 6 is a structural diagram of the second contact;

[0026] Figure 7 for Figure 2 A magnified view of point A;

[0027] Figure 8 for Figure 3 Enlarged view of point B;

[0028] Figure 9 for Figure 3 Enlarged view of point C;

[0029] Figure 10 for Figure 3 Enlarged view of point D;

[0030] Figure 11 for Figure 3 Enlarged view of point E;

[0031] Figure 12 for Figure 4 Enlarged view of point F;

[0032] Figure 13 for Figure 5 Enlarged view of point G;

[0033] Figure 14 for Figure 5 Enlarged view of H;

[0034] Figure 15 for Figure 5 Enlarged view of point I.

[0035] In the figure: 1, main frame; 2, moving slot; 3, first slide; 4, second slide; 5, card slot; 6, third slide; 7, fourth slide; 8, concentricity monitoring mechanism; 81, third guide rod; 82, third slider; 83, first spring; 84, first support plate; 85, first blocking rod; 86, extrusion cylinder; 87, limit slide; 88, limit slider; 89, ball seat; 810, second spring; 811, ball; 812, fourth guide rod; 813, fourth slider; 814, second support plate; 815, fifth slide; 816, sixth slide; 817, fifth guide rod; 818, first contact; 819, positive and negative thread screw; 820, second scale line; 821, third spring; 822, fifth slider Block; 823, sixth slider; 824, wedge-shaped insulating block; 825, second blocking rod; 9, outer diameter monitoring mechanism; 91, first guide rod; 92, first slider; 93, fourth spring; 94, second guide rod; 95, second slider; 96, extrusion groove; 97, fifth spring; 98, card ball; 99, first baffle; 910, second contact; 911, support frame; 912, roller; 913, second baffle; 914, third contact; 10, limit block; 11, moving block; 12, limit groove; 13, first hydraulic cylinder; 14, rotating rod; 15, ring rolling roller; 16, motor; 17, second hydraulic cylinder; 18, guide roller frame; 19, guide roller; 20, core roller; 21, warning light; 22, first scale line. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0037] See also Figure 1-15The present invention provides a forging device for flange processing and a technical solution of a forging method, comprising: a main frame 1, a movable groove 2, a first slide groove 3, a second slide groove 4, a clamping groove 5, a third slide groove 6, a fourth slide groove 7, a concentricity monitoring mechanism 8, an outer diameter monitoring mechanism 9, a limit block 10, a movable block 11, a limit groove 12, a first hydraulic cylinder 13, a rotating rod 14, a ring rolling roller 15, a motor 16, a second hydraulic cylinder 17, a guide roller frame 18, a guide roller 19, a core roller 20, a warning light 21 and a first scale line 22. The front top of the main frame 1 is provided with a movable groove 2 running through the front and back in the up-down direction, the front bottom of the main frame 1 is provided with a first slide groove 3 in the up-down direction, the left and right sides of the front bottom of the main frame 1 are provided with second slide grooves 4 in the up-down direction, and the two second slide grooves 4 are provided in the up-down direction. They are respectively located on the left and right sides of the first chute 3, and the inner cavity of the second chute 4 is provided with a plurality of card slots 5 at equal distances along the up and down directions on the left and right sides. Two third chutes 6 are provided on the rear side of the main frame 1 along the left and right directions. The two third chutes 6 are respectively located on the upper and lower sides of the movable groove 2. Two fourth chutes 7 are provided on the rear side of the main frame 1 along the left and right directions. A concentricity monitoring mechanism 8 is provided on the rear side of the main frame 1. The concentricity monitoring mechanism 8 is used to monitor the concentricity of the core roller 20 and the ring rolling roller 15. The outer diameter monitoring mechanism 9 is provided in the inner cavity of the first chute 3. The outer diameter monitoring mechanism 9 is used to monitor the outer diameter of the flange blank. There are two limit blocks 10. The two limit blocks 10 are respectively provided on the left and right sides of the inner cavity of the movable groove 2. The limit blocks 10 and the limit slots 12 can cooperate to move the limit blocks 11 is limited, the moving block 11 is slidably adapted and inserted into the inner cavity of the moving groove 2, and the left and right sides of the moving block 11 are provided with limited grooves 12 in the up and down directions, and the limit block 10 is slidably adapted and inserted into the inner cavity of the limit groove 12, and the moving block 11 is used to support the ring rolling roller 15, and the first hydraulic cylinder 13 is arranged at the top of the main frame 1, and the bottom end of the first hydraulic cylinder 13 can be slidably extended into the inner cavity of the moving groove 2, and the bottom end of the first hydraulic cylinder 13 is arranged at the top of the moving block 11. The first hydraulic cylinder 13 is a prior art and will not be described in detail here. The first hydraulic cylinder 13 is used here to push the moving block 11 up and down, and the middle part of the outer wall of the rotating rod 14 is rotatably arranged in the inner cavity of the moving block 11 through a bearing, and the front and rear ends of the rotating rod 14 can be rotatably extended respectively. Extending out the front and rear sides of the moving block 11, the ring rolling roller 15 is sleeved on the front side of the outer wall of the rotating rod 14 and locked. The ring rolling roller 15 is a prior art and will not be described in detail here. The ring rolling roller 15 is used here to expand the flange blank. The motor 16 is screwed to the rear side of the moving block 11. The rear end of the rotating rod 14 is locked to the output end of the motor 16 through a coupling. The motor 16 is a prior art and is a servo motor. The motor 16 is connected to a servo controller. The motor 16 is used to drive the rotating rod 14 to rotate. There are two second hydraulic cylinders 17. The top ends of the two second hydraulic cylinders 17 are rotatably arranged on the left and right ends of the front side of the main frame 1 through pins. The second hydraulic cylinder 17 is a prior art and will not be described in detail here.The second hydraulic cylinder 17 is used to push the guide roller frame 18 to rotate. There are two guide roller frames 18. The two guide roller frames 18 are rotatably arranged at the left and right ends of the front side of the main frame 1 through a pin shaft. The bottom end of the second hydraulic cylinder 17 is rotatably arranged at the top of the guide roller frame 18 through a pin shaft. The guide roller frame 18 is used to drive the guide roller 19 to move. The guide roller 19 is rotatably arranged at the bottom end of the guide roller frame 18. The guide roller 19 is used to stabilize the flange blank. The core roller 20 is rotatably arranged at the middle of the front side of the main frame 1 through a bearing. The rear end of the core roller 20 is rotatably extended out of the rear side of the main frame 1. The core roller 20 is a prior art and will not be described in detail here. The core roller 20 is used to support the flange blank. A warning light 21 is set at the top of the main frame 1. The warning light 21 is used to remind the staff that the position of the ring rolling roller 15 or the core roller 20 is skewed. The first scale line 22 is set on the front side of the main frame 1. The first scale line 22 is used to mark the position of the support frame 911.

[0038] As a preferred solution, further, the outer diameter monitoring mechanism 9 includes: a first guide rod 91, a first slider 92, a fourth spring 93, a second guide rod 94, a second slider 95, an extrusion groove 96, a fifth spring 97, a card ball 98, a first baffle 99, a second contact 910, a support frame 911, a roller 912, a second baffle 913 and a third contact 914. The upper and lower ends of the first guide rod 91 are respectively arranged on the upper and lower sides of the inner cavity of the first slide groove 3. The first guide rod 91 is used to prevent the first slider 92 from escaping from the inner cavity of the first slide groove 3. The first slider 92 can be slidably adapted and inserted into the inner cavity of the first slide groove 3. The first slider 92 can be slidably sleeved on the outer wall of the first guide rod 91. The first slider 92 is used to install the support frame 911. The fourth spring 9 3 is sleeved on the bottom end of the outer wall of the first guide rod 91, the top end of the fourth spring 93 is clamped on the bottom end of the first slider 92, and the bottom end of the fourth spring 93 is clamped on the bottom end of the inner cavity of the first slide groove 3. The fourth spring 93 is a rotation spring. It elastically deforms after being squeezed or stretched by external force and returns to its initial state after the external force is removed. The fourth spring 93 is used to push the first slider 92 upward. The rear side of the support frame 911 is set at the front side of the first slider 92, and the roller 912 is rotatably set at the top end of the support frame 911. There are two second baffles 913, and the two second baffles 913 are respectively set on the left and right sides of the support frame 911. The position of the first scale line 22 corresponds to the position of the second baffle 913. The second baffle 913 is used to install the first scale line 22. The third contact 914 is provided at the top of the second baffle 913. The third contact 914 is a prior art and will not be described in detail here. The upper and lower ends of the second guide rod 94 are respectively provided at the upper and lower sides of the inner cavity of the second slide groove 4. The second guide rod 94 is used to prevent the second slider 95 from pushing the inner cavity of the second slide groove 4. The second slider 95 is slidably adapted to be inserted into the inner cavity of the second slide groove 4. The second slider 95 is slidably sleeved on the outer wall of the second guide rod 94. Extrusion grooves 96 are provided on the left and right sides of the second slider 95. The second slider 95 is used to support the first baffle 99. The fifth spring 97 is embedded in the inner cavity of the extrusion groove 96. One end of the fifth spring 97 is clamped on the inner side of the inner cavity of the extrusion groove 96. The fifth spring 97 is a rotation spring. After being squeezed or stretched by external force, it undergoes elastic deformation and returns to its initial state after the external force is removed. The fifth spring 97 is used to squeeze the card ball 98 into the inner cavity of the card slot 5. A part of the card ball 98 is embedded in the inner cavity of the extrusion groove 96, and the other part of the card ball 98 is adapted to extend into the inner cavity of the card slot 5 corresponding to its position. The other end of the fifth spring 97 is clamped to the outer wall of the card ball 98. The position of the second slider 95 can be fixed by the cooperation between the card ball 98 and the card slot 5. The length of the card ball 98 extending into the inner cavity of the card slot 5 is less than its radius, ensuring that the second slider 95 can slide up and down. The first baffle 99 is arranged on the front side of the second slider 95, and the bottom ends of the two first baffles 99 are in contact with the top ends of the two second baffles 913 respectively.The first baffle 99 is used to block the second baffle 913, thereby preventing the support frame 911 from moving upward. The second contact 910 is set at the bottom end of the first baffle 99. The two second contacts 910 are in contact with the two third contacts 914 respectively. The second contacts 910 are prior art and will not be described in detail here.

[0039] As a preferred embodiment, the concentricity monitoring mechanism 8 further includes: a third guide rod 81, a third slider 82, a first spring 83, a first support plate 84, a first blocking rod 85, an extrusion cylinder 86, a limiting slide 87, a limiting slider 88, a ball seat 89, a second spring 810, a ball 811, a fourth guide rod 812, a fourth slider 813, a second support plate 814, a fifth slide 815, a sixth slide 816, a fifth guide rod 817, a first contact 818, a forward and reverse thread screw 819, a second scale line 820, a third spring 821, a fifth slider 822, a sixth slider 823, a wedge-shaped insulating block 824 and a second blocking rod 825. The left and right ends of the third guide rod 81 are respectively arranged on the left and right sides of the inner cavity of the third slide 6. The third guide rod 81 is used to prevent the third slider 82 from escaping from the inner cavity of the third slide groove 6. The third slider 82 can be slidably adapted and inserted in the middle of the inner cavity of the third slide groove 6. The third slider 82 can be slidably sleeved on the middle of the outer wall of the third guide rod 81. The number of first springs 83 is four. The four first springs 83 are respectively sleeved on the left and right sides of the outer walls of the two third guide rods 81. One end of the four first springs 83 is respectively clamped on the left and right sides of the inner cavity of the two third slide grooves 6. The other ends of the four first springs 83 are respectively clamped on the left and right sides of the two third sliders 82. The first spring 83 is a rotation spring. It undergoes elastic deformation after being squeezed or stretched by external force. It returns to its initial state after the external force is removed. The first spring 83 is used here to push the third slider 82 to return to its initial state. The first support plate 84 is arranged at the rear side of the third slider 82, and the number of the first blocking rods 85 is two. The upper and lower ends of the two first blocking rods 85 are respectively arranged at the left and right ends of the inner sides of the two first support plates 84. The rear end of the outer wall of the rotating rod 14 is located between the two first blocking rods 85. The outer wall of the rotating rod 14 contacts the outer wall of the first blocking rod 85. The extrusion cylinder 86 is arranged in the middle of the top of the first support plate 84 located below. The left and right sides of the inner cavity of the extrusion cylinder 86 are provided with limited sliding grooves 87 in the upper and lower directions. The limiting slider 88 can be slidably adapted and inserted into the bottom end of the inner cavity of the limiting sliding groove 87. The cooperation between the limiting slider 88 and the limiting sliding groove 87 can limit the ball seat 89. The left and right sides of the ball seat 89 are respectively The ball seat 89 is arranged on the inner side of the two limit sliders 88, and is a conductor. The ball seat 89 and the warning light 21 are electrically connected. The ball seat 89 is used to install the ball 811. The second spring 810 is embedded in the top of the inner cavity of the extrusion cylinder 86. The top of the second spring 810 is clamped on the top of the inner cavity of the extrusion cylinder 86. The bottom end of the second spring 810 is clamped on the top of the ball seat 89. The second spring 810 is a rotation spring. It undergoes elastic deformation after being squeezed or stretched by external force and returns to its initial state after the external force is removed. The second spring 810 is used here to push the ball seat 89 to move downward. The ball 811 can roll to fit the inner cavity embedded in the ball seat 89. The bottom end of the ball 811 can roll out of the bottom end of the first support plate 84. The ball 811 is a conductor.The ball 811 can be used to electrically connect the ball seat 89 and the first contact 818. The length of the ball 811 embedded in the inner cavity of the ball seat 89 is greater than its radius, which prevents the ball 811 from escaping from the inner cavity of the ball seat 89. The left and right ends of the fourth guide rod 812 are respectively arranged on the left and right sides of the inner cavity of the fourth slide groove 7. The fourth guide rod 812 is used to prevent the fourth slider 813 from escaping from the inner cavity of the fourth slide groove 7. The fourth slider 813 can be slidably adapted and inserted into the middle of the inner cavity of the fourth slide groove 7. The fourth slider 813 can be slidably sleeved on the outer wall of the fourth guide rod 812. There are four third springs 821, which are respectively sleeved on the left and right sides of the outer walls of the two fourth guide rods 812. One end of the four third springs 821 is respectively clamped On the left and right sides of the inner cavity of the two fourth slide grooves 7, the other ends of the four third springs 821 are respectively clamped on the left and right sides of the two fourth sliders 813. The third spring 821 is a rotation spring. It undergoes elastic deformation after being squeezed or stretched by external force, and returns to its initial state after the external force is removed. The third spring 821 is used to push the fourth slider 813 to return to its initial position. The second support plate 814 is arranged on the rear side of the fourth slider 813. The top of the second support plate 814 located above is provided with fifth slide grooves 815 on both sides. The rear side of the second support plate 814 located above is provided with a sixth slide groove 816 along the left and right directions. The first contact point 818 is arranged in the middle of the top of the second support plate 814 located above along the left and right directions. The ball 81 1 is in contact with the first contact 818, the first contact 818 is electrically connected to the power supply, the left and right ends of the fifth guide rod 817 are respectively arranged on the left and right sides of the inner cavity of the fifth slide groove 815, the fifth guide rod 817 is used to prevent the fifth slider 822 from escaping from the inner cavity of the fifth slide groove 815, the second scale line 820 is arranged on the rear side of the second support plate 814 located above, the second scale line 820 is used to mark the distance between the two wedge-shaped insulating blocks 824, the number of the fifth sliders 822 is four, the four fifth sliders 822 are respectively slidably adapted to be plugged into the left and right sides of the inner cavity of the two fifth slide grooves 815, the fifth slider 822 is slidably sleeved on the outer wall of the fifth guide rod 817, the number of the wedge-shaped insulating blocks 824 is two, and the two wedge-shaped insulating blocks 824 are The front and rear sides of the bottom end of the block 824 are respectively arranged on the top ends of the four fifth sliders 822, and the two wedge-shaped insulating blocks 824 are arranged opposite to each other. The wedge-shaped insulating block 824 is used to block the first contact 818. The right end of the positive and negative thread screw 819 is rotatably arranged on the right side of the inner cavity of the sixth slide groove 816 through a bearing, and the left end of the positive and negative thread screw 819 is rotatable and extends out of the left side of the second support plate 814. The rotational force generated by the rotation of the positive and negative thread screw 819 can prompt the sixth slider 823 to drive the wedge-shaped insulating block 824 to move. There are two sixth sliders 823, and the two sixth sliders 823 are respectively arranged on the rear sides of the two wedge-shaped insulating blocks 824. The sixth slider 823 can be slidably adapted and inserted into the inner cavity of the sixth slide groove 816.The sixth slider 823 is screwed to the outer wall of the forward and reverse threaded screw 819. There are two second blocking rods 825, with their upper and lower ends respectively located on the left and right ends of the inner sides of the two second support plates 814. The rear end of the outer wall of the core roller 20 is located between the two second blocking rods 825, and the outer wall of the core roller 20 contacts the outer walls of the second blocking rods 825.

[0040] A forging method for a flange processing forging device specifically comprises the following steps:

[0041] The second slider 95 moves downward along the inner cavity of the second slide groove 4, and uses the inner wall of the card groove 5 to squeeze the card ball 98 to move toward the inner cavity of the extrusion groove 96, and squeeze the fifth spring 97 to cause elastic deformation until the card ball 98 is completely out of the inner cavity of the card groove 5. At the same time, the second slider 95 moves downward to drive the first baffle 99 to move downward. The first baffle 99 moves downward to squeeze the second baffle 913 to drive the support frame 911 and the roller 912 to move downward, and squeeze the fourth spring 93 to cause elastic deformation. The position of the support frame 911 is determined by observing the first scale line 22 until the support frame 911 drives the roller 912 to move to the appropriate position. At this time, under the elastic force of the fifth spring 97, the card ball 98 can be pushed to move to the inner cavity of the card groove 5 corresponding to its current position, thereby fixing the position of the second slider 95, and then fixing the position of the support frame 911.

[0042] Step 2: Rotate the forward and reverse threaded screws 819 based on the concentricity deviation between the ring rolling roller 15 and the core roller 20 allowed in actual conditions. The rotation of the forward and reverse threaded screws 819 causes the two sixth sliders 823 to drive the two wedge-shaped insulating blocks 824 to move inward or outward synchronously. The distance between the two wedge-shaped insulating blocks 824 is determined according to the second scale line 820 until the two wedge-shaped insulating blocks 824 move to the appropriate position.

[0043] Step 3: Put the flange blank that needs to be forged and rolled on the outer wall of the core roller 20. Due to the factor of gravity, the top of the inner wall of the flange blank is brought into contact with the top of the outer wall of the core roller 20. Start the second hydraulic cylinder 17, and use the second hydraulic cylinder 17 to push the guide roller frame 18 to drive the guide roller 19 to rotate until the guide roller 19 and the flange blank are in contact. Start the first hydraulic cylinder 13, and use the first hydraulic cylinder 13 to push the moving block 11 to drive the rotating rod 14 and the ring rolling roller 15 to move downward until the outer wall of the ring rolling roller 15 is in contact with the flange blank. The motor 16 is started, and the output end of the motor 16 is used to drive the ring rolling roller 15 to rotate through the rotating rod 14. Under the action of friction, the ring rolling roller 15 can drive the flange blank and the core roller 20 to rotate, thereby expanding the flange blank and increasing the outer diameter of the flange blank. As the outer diameter of the flange blank increases, the second hydraulic cylinder 17 is used to pull the guide roller frame 18 to rotate in the opposite direction to the above, so that the guide roller 19 is always in contact with the outer wall of the flange blank.

[0044] Step 4: When the concentricity of the ring rolling roller 15 and the core roller 20 deviates, the rotating rod 14 can be used to push the first blocking rod 85 to move left and right, or the core roller 20 can be used to push the second blocking rod 825 to move left and right, thereby prompting the first support plate 84 or the second support plate 814 to move left and right. The left and right movement of the first support plate 84 or the second support plate 814 can prompt the rolling ball 811 to move left and right along the top of the first contact point 818. When the concentricity of the ring rolling roller 15 and the core roller 20 deviates, the first blocking rod 85 can be used to push the second blocking rod 825 to move left and right, thereby prompting the first support plate 84 or the second support plate 814 to move left and right. When the concentricity deviation is within the allowable range, the ball 811 will not separate from the first contact 818. When the concentricity deviation of the ring roller 15 and the core roller 20 exceeds the allowable range, the ball 811 will roll to the top of the wedge-shaped insulating block 824, pushing the ball seat 89 to move upward along the inner cavity of the extrusion cylinder 86 and squeezing the second spring 810 to cause elastic deformation, thereby separating the ball 811 from the first contact 818, breaking the circuit, and causing the warning light 21 to turn off, thereby reminding the staff to perform maintenance.

[0045] Step 5. As the flange blank is forged and expanded, the outer diameter of the flange blank gradually increases until the outer diameter of the flange blank contacts the roller 912. The outer diameter of the flange blank can be used to squeeze the roller 912 to push the support frame 911 to move downward. The downward movement of the support frame 911 drives the second baffle 913 to move downward, thereby causing the third contact 914 and the second contact 910 to separate, and then the motor is turned off to complete the expansion of the flange blank.

[0046] In summary, the device can monitor the concentricity of the ring rolling roller 15 and the core roller 20 in real time, avoid inconsistent force directions, avoid defects such as uneven deformation of the blank, dimensional deviation and shape distortion, improve the dimensional accuracy and shape accuracy of the flange, reduce the occurrence of surface defects such as cracks, scratches or indentations, and improve the appearance quality and performance of the workpiece. At the same time, it can achieve precise control of the outer diameter change, reduce the defective product rate, ensure the smooth progress of subsequent processing steps, and at the same time promote the improvement of production automation and intelligence levels, and reduce production costs and labor intensity.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A forging device for flange processing, characterized in that: include: A main frame (1), wherein a movable groove (2) penetrating from front to back is provided at the top of the front side of the main frame (1) in the up-down direction, a first slide groove (3) is provided at the bottom of the front side of the main frame (1) in the up-down direction, and second slide grooves (4) are provided on both the left and right sides of the bottom of the front side of the main frame (1) in the up-down direction, and the two second slide grooves (4) are respectively located on the left and right sides of the first slide groove (3), and a plurality of slots (5) are equidistantly provided on the left and right sides of the inner cavity of the second slide groove (4) in the up-down direction, and two third slide grooves (6) are provided on the rear side of the main frame (1) in the left-right direction, and the two third slide grooves (6) are respectively located on the upper and lower sides of the movable groove (2), and two fourth slide grooves (7) are provided on the rear side of the main frame (1) in the left-right direction; A concentricity monitoring mechanism (8), wherein the concentricity monitoring mechanism (8) is arranged on the rear side of the main frame (1); An outer diameter monitoring mechanism (9), wherein the outer diameter monitoring mechanism (9) is arranged in the inner cavity of the first slide groove (3); A limit block (10), wherein the number of the limit blocks (10) is two, and the two limit blocks (10) are respectively arranged on the left and right sides of the inner cavity of the movable groove (2); A moving block (11), the moving block (11) can be slidably adapted to be inserted into the inner cavity of the moving groove (2), the left and right sides of the moving block (11) are provided with limiting grooves (12) in the up and down directions, and the limiting block (10) can be slidably adapted to be inserted into the inner cavity of the limiting groove (12); A first hydraulic cylinder (13), the first hydraulic cylinder (13) being arranged at the top end of the main frame (1), the bottom end of the first hydraulic cylinder (13) being slidably extended into the inner cavity of the movable groove (2), and the bottom end of the first hydraulic cylinder (13) being arranged at the top end of the movable block (11); A rotating rod (14), wherein the middle portion of the outer wall of the rotating rod (14) is rotatably disposed in the inner cavity of the moving block (11) via a bearing, and the front and rear ends of the rotating rod (14) are rotatably extended out of the front and rear sides of the moving block (11); A ring rolling roller (15), wherein the ring rolling roller (15) is sleeved on the front side of the outer wall of the rotating rod (14) and locked; A motor (16), wherein the motor (16) is screw-connected to the rear side of the moving block (11), and the rear end of the rotating rod (14) is locked to the output end of the motor (16) through a coupling; A second hydraulic cylinder (17), the number of the second hydraulic cylinders (17) is two, and the top ends of the two second hydraulic cylinders (17) are rotatably arranged at the left and right ends of the front side of the main frame (1) through pin shafts; A guide roller frame (18), wherein the number of the guide roller frames (18) is two, and the two guide roller frames (18) are rotatably arranged at the left and right ends of the front side of the main frame (1) through a pin shaft, and the bottom end of the second hydraulic cylinder (17) is rotatably arranged at the top end of the guide roller frame (18) through a pin shaft; A guide roller (19), wherein the guide roller (19) is rotatably arranged at the bottom end of the guide roller frame (18); A core roller (20), the core roller (20) being rotatably arranged at the middle of the front side of the main frame (1) via a bearing, and the rear end of the core roller (20) being rotatably extended out of the rear side of the main frame (1); A warning light (21), wherein the warning light (21) is arranged at the top of the main frame (1); A first scale line (22), wherein the first scale line (22) is arranged on the front side of the main frame (1).

2. A flange forging device according to claim 1, characterized in that: The outer diameter monitoring mechanism (9) comprises: A first guide rod (91), wherein upper and lower ends of the first guide rod (91) are respectively arranged at upper and lower sides of the inner cavity of the first slide groove (3); A first sliding block (92), the first sliding block (92) can be slidably adapted to be inserted into the inner cavity of the first sliding groove (3), and the first sliding block (92) can be slidably sleeved on the outer wall of the first guide rod (91); A fourth spring (93), wherein the fourth spring (93) is sleeved on the bottom end of the outer wall of the first guide rod (91), the top end of the fourth spring (93) is clamped on the bottom end of the first slider (92), and the bottom end of the fourth spring (93) is clamped on the bottom end of the inner cavity of the first slide groove (3); A support frame (911), the rear side of the support frame (911) being arranged on the front side of the first sliding block (92); A roller (912), wherein the roller (912) is rotatably disposed on the top of the support frame (911); A second baffle (913), wherein the number of the second baffles (913) is two, and the two second baffles (913) are respectively arranged on the left and right sides of the support frame (911), and the position of the first scale line (22) corresponds to the position of the second baffle (913); A third contact point (914), wherein the third contact point (914) is disposed at the top end of the second baffle (913).

3. A flange forging device according to claim 2, characterized in that: The outer diameter monitoring mechanism (9) further comprises: A second guide rod (94), wherein upper and lower ends of the second guide rod (94) are respectively arranged at upper and lower sides of the inner cavity of the second slide groove (4); A second slider (95), the second slider (95) can be slidably adapted to be inserted into the inner cavity of the second slide groove (4), the second slider (95) can be slidably sleeved on the outer wall of the second guide rod (94), and the left and right sides of the second slider (95) are both provided with extrusion grooves (96); A fifth spring (97), wherein the fifth spring (97) is embedded in the inner cavity of the extrusion groove (96), and one end of the fifth spring (97) is clamped on the inner side of the inner cavity of the extrusion groove (96); A card ball (98), a portion of which is embedded in the inner cavity of the extrusion groove (96), another portion of which is adapted to extend into the inner cavity of the card groove (5) corresponding to its position, and the other end of the fifth spring (97) is card-connected to the outer wall of the card ball (98); A first baffle (99), wherein the first baffle (99) is arranged on the front side of the second sliding block (95), and the bottom ends of the two first baffles (99) are in contact with the top ends of the two second baffles (913) respectively; The second contact (910) is arranged at the bottom end of the first baffle (99), and the two second contacts (910) are in contact with the two third contacts (914) respectively.

4. A flange forging device according to claim 3, characterized in that: The length of the clamping ball (98) extending into the inner cavity of the clamping slot (5) is less than its radius.

5. A flange forging device according to claim 4, characterized in that: The concentricity monitoring mechanism (8) comprises: A third guide rod (81), the left and right ends of the third guide rod (81) being respectively arranged on the left and right sides of the inner cavity of the third slide groove (6); A third sliding block (82), the third sliding block (82) can be slidably adapted and inserted into the middle part of the inner cavity of the third sliding groove (6), and the third sliding block (82) can be slidably sleeved on the middle part of the outer wall of the third guide rod (81); A first spring (83), wherein the number of the first springs (83) is four, and the four first springs (83) are respectively sleeved on the left and right sides of the outer wall of the two third guide rods (81), one end of the four first springs (83) is respectively clamped on the left and right sides of the inner cavity of the two third slide grooves (6), and the other end of the four first springs (83) is respectively clamped on the left and right sides of the two third sliders (82); A first support plate (84), the first support plate (84) being arranged on the rear side of the third sliding block (82); A first blocking rod (85), the number of the first blocking rods (85) is two, the upper and lower ends of the two first blocking rods (85) are respectively arranged at the left and right ends of the inner sides of the two first support plates (84), the rear end of the outer wall of the rotating rod (14) is located between the two first blocking rods (85), and the outer wall of the rotating rod (14) is in contact with the outer wall of the first blocking rod (85); An extrusion cylinder (86), the extrusion cylinder (86) being arranged at the middle of the top end of the first support plate (84) located below, and the inner cavity of the extrusion cylinder (86) is provided with limit sliding grooves (87) in the up-down direction on both left and right sides thereof; A limiting slider (88), wherein the limiting slider (88) is slidably adapted to be inserted into the bottom end of the inner cavity of the limiting slide groove (87); A rolling ball seat (89), the left and right sides of the rolling ball seat (89) are respectively arranged on the inner sides of the two limit sliders (88), the rolling ball seat (89) is a conductor, and the rolling ball seat (89) and the warning light (21) are electrically connected; A second spring (810), wherein the second spring (810) is embedded in the top end of the inner cavity of the extrusion cylinder (86), the top end of the second spring (810) is clamped to the top end of the inner cavity of the extrusion cylinder (86), and the bottom end of the second spring (810) is clamped to the top end of the rolling ball seat (89); A rolling ball (811) is rollably adapted to be embedded in the inner cavity of the rolling ball seat (89), the bottom end of the rolling ball (811) is rollably extended out of the bottom end of the first support plate (84), and the rolling ball (811) is a conductor.

6. A flange forging device according to claim 5, characterized in that: The concentricity monitoring mechanism (8) further comprises: A fourth guide rod (812), the left and right ends of the fourth guide rod (812) being respectively arranged on the left and right sides of the inner cavity of the fourth slide groove (7); A fourth slider (813), the fourth slider (813) can be slidably adapted and inserted into the middle part of the inner cavity of the fourth slide groove (7), and the fourth slider (813) can be slidably sleeved on the outer wall of the fourth guide rod (812); A third spring (821), wherein the number of the third springs (821) is four, and the four third springs (821) are respectively sleeved on the left and right sides of the outer walls of the two fourth guide rods (812), one end of the four third springs (821) is respectively clamped on the left and right sides of the inner cavities of the two fourth slide grooves (7), and the other ends of the four third springs (821) are respectively clamped on the left and right sides of the two fourth sliders (813); A second support plate (814), the second support plate (814) being arranged at the rear side of the fourth sliding block (813), a fifth sliding groove (815) being provided at both the front and rear sides of the top end of the second support plate (814) located at the top, and a sixth sliding groove (816) being provided at the rear side of the second support plate (814) located at the top along the left and right directions; A first contact point (818), the first contact point (818) is arranged in the middle of the top end of the second support plate (814) located above along the left-right direction, the rolling ball (811) is in contact with the first contact point (818), and the first contact point (818) is electrically connected to a power source; A fifth guide rod (817), the left and right ends of the fifth guide rod (817) being respectively arranged on the left and right sides of the inner cavity of the fifth slide groove (815); A second scale line (820), the second scale line (820) being arranged on the rear side of the second support plate (814) located above; A fifth slider (822), the number of the fifth sliders (822) is four, the four fifth sliders (822) are respectively slidably adapted and plugged into the left and right sides of the inner cavity of the two fifth slide grooves (815), and the fifth sliders (822) are slidably sleeved on the outer wall of the fifth guide rod (817); wedge-shaped insulating blocks (824), the number of the wedge-shaped insulating blocks (824) being two, the front and rear sides of the bottom ends of the two wedge-shaped insulating blocks (824) being respectively arranged at the top ends of the four fifth sliding blocks (822), and the two wedge-shaped insulating blocks (824) being arranged opposite to each other; A forward and reverse threaded screw (819), wherein the right end of the forward and reverse threaded screw (819) is rotatably disposed on the right side of the inner cavity of the sixth slide groove (816) via a bearing, and the left end of the forward and reverse threaded screw (819) is rotatably extended out of the left side of the second support plate (814); A sixth slider (823), the number of the sixth sliders (823) is two, the two sixth sliders (823) are respectively arranged on the rear sides of the two wedge-shaped insulating blocks (824), the sixth slider (823) can be slidably adapted to be inserted into the inner cavity of the sixth slide groove (816), and the sixth slider (823) is screwed to the outer wall of the positive and negative thread screw (819); The second blocking rod (825) is provided in two numbers, and the upper and lower ends of the two second blocking rods (825) are respectively arranged at the left and right ends of the inner sides of the two second support plates (814), and the rear end of the outer wall of the core roller (20) is located between the two second blocking rods (825), and the outer wall of the core roller (20) is in contact with the outer wall of the second blocking rod (825).

7. A flange forging device according to claim 6, characterized in that: The length of the rolling ball (811) embedded in the inner cavity of the rolling ball seat (89) is greater than its radius.

8. A forging method for a flange processing forging device according to claim 7, characterized in that: The specific steps include: Step 1: When in use, the height of the support frame (911) is adjusted according to the outer diameter of the flange formed by forging, and the second slider (95) is slid downward. The second slider (95) moves downward along the inner cavity of the second slide groove (4), and the inner wall of the card groove (5) is used to squeeze the card ball (98) to move toward the inner cavity of the extrusion groove (96), and the fifth spring (97) is squeezed to undergo elastic deformation until the card ball (98) is completely separated from the inner cavity of the card groove (5). At the same time, the second slider (95) moves downward to drive the first baffle plate (99) to move downward, and the first baffle plate (99) moves downward by squeezing The second baffle (913) drives the support frame (911) and the roller (912) to move downward, and squeezes the fourth spring (93) to cause elastic deformation. The position of the support frame (911) is determined by observing the first scale line (22) until the support frame (911) drives the roller (912) to move to a suitable position. At this time, under the elastic force of the fifth spring (97), the card ball (98) can be pushed to move to the inner cavity of the card slot (5) corresponding to its current position, thereby fixing the position of the second slider (95) and further fixing the position of the support frame (911); Step 2: rotating the positive and negative threaded screws (819) according to the concentricity deviation value of the ring rolling roller (15) and the core roller (20) allowed in actual conditions, the rotation of the positive and negative threaded screws (819) prompting the two sixth sliders (823) to drive the two wedge-shaped insulating blocks (824) to move synchronously inward or outward, and determining the distance between the two wedge-shaped insulating blocks (824) according to the second scale line (820), until the two wedge-shaped insulating blocks (824) move to a suitable position; Step 3: The flange blank to be forged and rolled is placed on the outer wall of the core roller (20). Due to the factor of gravity, the top of the inner wall of the flange blank is brought into contact with the top of the outer wall of the core roller (20). The second hydraulic cylinder (17) is started, and the guide roller frame (18) is pushed by the second hydraulic cylinder (17) to drive the guide roller (19) to rotate until the guide roller (19) and the flange blank are in contact. The first hydraulic cylinder (13) is started, and the first hydraulic cylinder (13) is used to push the moving block (11) to drive the rotating rod (14) and the ring rolling roller (15) to move downward until the ring rolling roller (15) is in contact with the flange blank. ) contacts the outer wall of the flange blank with the top of the outer wall of the flange blank, starts the motor (16), and uses the output end of the motor (16) to drive the ring rolling roller (15) to rotate through the rotating rod (14). Under the action of friction force, the ring rolling roller (15) drives the flange blank and the core roller (20) to rotate, thereby expanding the flange blank and increasing the outer diameter of the flange blank. As the outer diameter of the flange blank increases, the second hydraulic cylinder (17) is used to pull the guide roller frame (18) to rotate in the opposite direction to the above, thereby causing the guide roller (19) to always contact the outer wall of the flange blank; Step 4: When the concentricity of the ring rolling roller (15) and the core roller (20) deviates, the rotating rod (14) can be used to push the first blocking rod (85) to move left and right, or the core roller (20) can be used to push the second blocking rod (825) to move left and right, thereby prompting the first support plate (84) or the second support plate (814) to move left and right. The left and right movement of the first support plate (84) or the second support plate (814) can prompt the rolling ball (811) to move left and right along the top of the first contact point (818). When the ring rolling roller (15) and the core roller (20) When the concentricity deviation of the ring roller (15) and the core roller (20) is within the allowable range, the ball (811) will not separate from the first contact point (818). When the concentricity deviation of the ring roller (15) and the core roller (20) exceeds the allowable range, the ball (811) can be urged to roll to the top of the wedge-shaped insulating block (824), and the ball seat (89) can be pushed to move upward along the inner cavity of the extrusion cylinder (86), and the second spring (810) can be squeezed to undergo elastic deformation, thereby urging the ball (811) and the first contact point (818) to separate, breaking the circuit, and thus urging the warning light (21) to turn off, thereby reminding the staff to carry out maintenance; Step 5. As the flange blank is forged and expanded, the outer diameter of the flange blank gradually increases until the outer diameter of the flange blank contacts the roller (912). The outer diameter of the flange blank can be used to squeeze the roller (912) to push the support frame (911) to move downward. The downward movement of the support frame (911) drives the second baffle (913) to move downward, thereby causing the third contact (914) and the second contact (910) to separate, and then the motor is turned off to complete the expansion of the flange blank.

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