CN110918841B - Vertical ring rolling machine for forging steel ring forging and forging method - Google Patents
Vertical ring rolling machine for forging steel ring forging and forging method Download PDFInfo
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- CN110918841B CN110918841B CN201911197950.7A CN201911197950A CN110918841B CN 110918841 B CN110918841 B CN 110918841B CN 201911197950 A CN201911197950 A CN 201911197950A CN 110918841 B CN110918841 B CN 110918841B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
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Abstract
The invention discloses a vertical ring rolling machine and a forging method for forging a steel ring forging, and relates to the technical field of ring rolling machines. The technical scheme is that a workbench is arranged on a rack and below a core roller, and a notch for one end of the workbench to pass through is arranged on a working surface; a first clamping roller and a second clamping roller which are used for respectively abutting against two axial end faces of the steel ring blank are arranged on the top surface of the workbench; the first clamping roller is positioned on one side of the core roller, which is far away from the working surface, and is connected with a first oil cylinder for driving the first clamping roller to move towards the working surface, and the second clamping roller is positioned on one side of the working surface, which is far away from the core roller, and is connected with a second oil cylinder for driving the second clamping roller to move towards the first clamping roller. When forging the steel ring forging, except that embracing the roller through two and carrying out radial spacing to the steel ring blank, still can realize that the axial is spacing through the bottom of two clamp rollers clamp tight steel ring blanks for the terminal surface of blank can keep leveling and the bottom of steel ring blank can not appear buckling or warping, has effectively guaranteed the quality of final fashioned steel ring forging.
Description
Technical Field
The invention relates to the technical field of ring rolling machines, in particular to a vertical ring rolling machine for forging a steel ring forging and a forging method.
Background
Forging is a processing method which utilizes forging machinery to apply pressure on a metal blank to cause the metal blank to generate plastic deformation so as to obtain a forged piece with certain mechanical property, certain shape and certain size. The forging process can eliminate the defects of as-cast porosity and the like generated in the smelting process of metal, optimize the microstructure, simultaneously can preserve complete metal streamline, and can also enlarge holes of some annular metal blanks, thereby realizing the reduction of the thickness of the blanks and ensuring that the inner diameter size of the blanks meets the requirements.
The steel ring forging is generally forged by a ring rolling mill, when the steel ring forging is forged by the ring rolling mill, a blank which is heated and punched with small holes is sleeved on a core roller of the ring rolling mill, and the blank is driven to rotate by the outer edge of a rolling roller of the ring rolling mill, so that the rolling forming process of reducing the thickness of the blank and expanding the diameter of the blank is realized.
For example, chinese patent publication No. CN108687279A discloses a ring rolling mill, which includes a frame, a working surface of the frame is an inclined surface forming an angle of 70 ° to 90 ° with a horizontal plane; the working surface is provided with a guide rail which runs from top to bottom, the sliding block is sleeved on the guide rail and can slide along the guide rail, the middle lower part of the sliding block is provided with a press roller, the top of the rack is fixed with an oil cylinder, and the middle upper part of the sliding block is connected with the oil cylinder; a core roller is arranged below the compression roller and fixed on the frame; a first holding roller and a second holding roller are arranged on the left lower side and the right lower side of the core roller, and are respectively connected with a first cylinder and a second cylinder; a motor is fixed on the back of the sliding block, the motor is connected with a power shaft through a chain and chain wheel mechanism, and the power shaft penetrates through the sliding block and is connected with the pressing roller; the press roll is a concave roll and the core roll is a convex roll.
The working principle of the technical scheme is as follows: before starting the equipment, firstly sleeving a blank punched with a small hole on a core roller; then the sliding block is driven to move downwards through the oil cylinder, and meanwhile the press roller is driven to rotate through the motor; and finally, driving the first holding roller and the second holding roller to contact with the outer side wall of the blank through two cylinders respectively so as to realize the positioning of the blank. After the press roller moves downwards to be in contact with the blank, the outer edge of the press roller can drive the blank to rotate, and therefore the rolling process of thinning the thickness and expanding the diameter of the blank is achieved.
However, in the above technical scheme, the two embrace rollers are abutted against the outer side wall of the annular blank to limit the radial movement of the steel ring blank, and the pressing roller drives the blank to rotate: on one hand, under the pressure of the press roll and the core roll, two end faces of the steel ring blank can be acted by outward expansion force along the axial direction of the steel ring blank, so that the end faces of the steel ring blank are easy to be uneven; on the other hand, the steel ring blank is only clamped by the compression roller and the core roller at the top, and the bottom of the steel ring blank is in a suspended state, so the bottom of the steel ring blank can inevitably receive acting force along the axial direction of the steel ring blank, and the blank is soft in texture when in a high-temperature state, so the bottom of the steel ring blank is very easy to bend or deform when receiving the axial acting force.
The quality of the finally formed steel ring forging piece can be influenced no matter the end face of the blank is uneven or the bottom of the blank is bent or deformed, and the blank can be scrapped under severe conditions, for example, when the steel ring blank is bent and is continuously extruded through the press roller and the core roller.
Disclosure of Invention
The invention aims to provide a vertical ring rolling machine and a forging method for forging a steel ring forging.
The invention aims at: the vertical ring rolling machine for forging the steel ring forging has the advantages that the quality of the finally formed steel ring forging can be effectively guaranteed;
the second purpose of the invention is that: provided is a forging method for forging a steel ring forging, which has the effect of effectively reducing the rejection rate.
The above object of the present invention is achieved by the following technical solutions:
a vertical ring rolling machine for forging steel ring forgings comprises a rack and a working surface arranged on the rack, wherein a guide rail which runs from top to bottom is arranged on the working surface, and a rolling roller which can slide along the guide rail is arranged on the guide rail; a core roller is arranged on the working surface and below the rolling roller, limiting oil cylinders are arranged on the working surface and on the left lower side and the right lower side of the core roller, and piston rods of the limiting oil cylinders face the core roller and are connected with the holding roller; a working table is arranged on the frame and below the core roller, and a notch for allowing one end of the working table to pass through is arranged on the working surface; the top surface of the workbench is provided with a first clamping roller and a second clamping roller which are used for respectively abutting against two axial end surfaces of the steel ring blank; the first clamping roller is positioned on one side of the core roller, which is far away from the working surface, and is connected with a first oil cylinder for driving the first clamping roller to move towards the working surface, and the second clamping roller is positioned on one side of the working surface, which is far away from the core roller, and is connected with a second oil cylinder for driving the second clamping roller to move towards the first clamping roller.
By adopting the technical scheme, in an initial state, the first clamping roller is positioned on one side of the core roller, which is far away from the working surface, and the second clamping roller is positioned on one side of the working surface, which is far away from the core roller; after the blank is sleeved on the core roller, the two holding rollers are abutted against the outer side wall of the blank, and then the first clamping roller and the second clamping roller are abutted against two axial end faces of the steel ring blank respectively. At the moment, after the rolling roller is driven to move downwards to be in contact with the blank, the outer edge of the rolling roller can drive the blank to rotate, and therefore the rolling process of thinning the thickness of the blank and expanding the diameter of the blank is achieved. In the rolling process of the blank, the two holding rollers limit the radial movement trend of the blank, and the two clamping rollers limit the axial movement trend of the blank, so the blank is not easy to swing in the rotating process, the blank is not easy to bend or deform, the end surface of the blank can be kept flat, and the quality of the finally formed steel ring forging is effectively ensured.
The invention is further configured to: the included angle between the working surface and the horizontal plane is more than 80 degrees and less than 90 degrees, the core roller is vertical to the working surface, and the height of one end of the core roller close to the working surface is lower than that of the other end of the core roller; the first clamping roller and the second clamping roller are both in a circular truncated cone shape, and the side surfaces of the first clamping roller and the second clamping roller can be abutted against the corresponding end surfaces of the steel ring blank.
Through adopting above-mentioned technical scheme, further reduced the blank on the core roller to keeping away from the motion trend of working face direction at rotatory in-process, the attenuate that carries out thickness to the blank that the roller can be stable is rolled to the assurance.
The invention is further configured to: the cylinder body of the first oil cylinder is connected with an installation plate, and the installation plate is fixed on the top surface of the workbench; a piston rod of the first oil cylinder is connected with a U-shaped plate, and the top end and the bottom end of the first clamping roller are rotatably connected with the U-shaped plate through bearings; the top end of the mounting plate is provided with a first sliding groove along the length direction of the first oil cylinder piston rod, and the bottom end of the U-shaped plate extends into the first sliding groove and is in sliding fit with the first sliding groove;
the cylinder body of the second oil cylinder is connected with the top surface of the workbench, a piston rod of the second oil cylinder is connected with an L-shaped plate, and the bottom end of the L-shaped plate is provided with a sliding block; the top end of the second clamping roller is rotatably connected with the L-shaped plate through a bearing, and the bottom end of the second clamping roller is rotatably connected with the sliding block through a bearing; the top surface of workstation is provided with the second spout along the length direction of second hydro-cylinder piston rod, the slider is located the second spout and slides the cooperation with the second spout.
Through adopting above-mentioned technical scheme, guaranteed the stability when first pinch roll and second pinch roll remove, the blank rolls the effort that the in-process applyed U-shaped board and L shaped plate and is transmitted the workstation on to the piston rod that has reduced the cylinder received pressure.
The invention is further configured to: an inserting rod is arranged at one end of the core roller, which is far away from the working surface, and the diameter of the inserting rod is smaller than that of the core roller; a supporting plate is arranged on the top surface of the workbench and positioned on one side of the core roller, which is far away from the working surface, and a through groove for the first clamping roller to pass through is formed in the supporting plate; the working table is provided with a driving component for driving the supporting plate to move towards the core roller, and the supporting plate is provided with a jack for inserting the inserted rod.
Through adopting above-mentioned technical scheme, can keep away from the one end of working face to the core roller and provide the support, avoided the core roller because the one end is unsettled and the bending that causes to the quality of final fashioned steel ring forging has also effectively been guaranteed.
The invention is further configured to: a third sliding groove is formed in the top surface of the workbench along the moving direction of the supporting plate, and a driving groove is formed in the bottom wall of the third sliding groove along the moving direction of the supporting plate; the driving assembly comprises a connecting block, a driving block and a third oil cylinder;
the connecting block is arranged in the third sliding groove in a sliding mode, the top end of the connecting block is connected with the bottom end of the supporting plate, and the bottom end of the connecting block is connected with the driving block; the one end that the connecting block was kept away from to the driving block passes the drive groove and stretches out to the workstation below, the cylinder body and the workstation of third hydro-cylinder are connected, the piston rod and the driving block of third hydro-cylinder are connected and are used for driving the backup pad and remove along third spout direction.
Through adopting above-mentioned technical scheme, be convenient for drive backup pad removes, and because the connecting block slides and sets up in the third spout, so the backup pad can be stable slide along the rectilinear direction, guaranteed jack and inserted bar accurate alignment and support the core roller after the inserted bar inserts the jack.
The invention is further configured to: and a plurality of idler wheels are distributed on the bottom wall of the third sliding groove and on the two sides of the driving groove along the moving direction of the supporting plate, and the idler wheels are abutted against the bottom end of the connecting block.
Through adopting above-mentioned technical scheme, the resistance when having reduced the backup pad greatly and the wearing and tearing when the connecting block slides for the removal of backup pad is more smooth and easy, and life is longer.
The invention is further configured to: and a guide rod is arranged in the driving groove along the axial direction of the third oil cylinder, and a guide hole for the guide rod to penetrate and be matched with the guide rod in a sliding manner is formed in the driving block.
By adopting the technical scheme, the driving block is further ensured to move along a straight line, and the connection stability of the supporting plate and the workbench is also ensured.
The invention is further configured to: the side wall of the supporting plate close to the core roller is provided with a mounting groove, and the jack is positioned on the bottom wall of the mounting groove; the installation groove is connected with a plane bearing, and the inner diameter of a loose ring and the inner diameter of a tight ring of the plane bearing are both larger than the diameter of the insertion rod; the tight ring of plane bearing is located the mounting groove and is connected with the diapire of mounting groove, plane bearing's loose ring stretches outside the mounting groove.
Through adopting above-mentioned technical scheme, plane bearing's loose ring can be contradicted with the terminal surface of roller and rotate together with the core roller, reduces the wearing and tearing of core roller terminal surface greatly.
The invention is further configured to: the side wall of the supporting plate close to the core roller is provided with a yielding groove, and the mounting groove is positioned on the bottom wall of the yielding groove; a connecting ring is arranged between the outer side wall of the fastening ring of the plane bearing and the inner wall of the mounting groove, and the connecting ring is fixedly connected with the fastening ring of the plane bearing; the limiting ring is arranged in the yielding groove, the inner diameter of the limiting ring is larger than the outer diameter of a tightening ring of the plane bearing and smaller than the outer diameter of the limiting ring, and the limiting ring is connected with the bottom wall of the yielding groove through a bolt.
Through adopting above-mentioned technical scheme for the flat bearing convenient to detach and installation, thereby pull down it when needs overhaul and maintenance.
The second aim of the invention is realized by the following technical scheme:
a forging method for forging a steel ring forging is based on the vertical ring rolling machine for forging the steel ring forging, and comprises the following steps:
s100, discharging: sleeving a steel ring blank which is heated and punched with a small hole on a core roller of a ring rolling machine, and aligning the steel ring blank with the position of a rolling roller;
s200, positioning: the two holding rollers are driven by a limiting oil cylinder to abut against the outer side wall of the steel ring blank, and the two clamping rollers are driven by a first oil cylinder and a second oil cylinder to abut against the two end faces of the steel ring blank respectively;
s300, ring grinding: the rolling roller is driven to rotate by a motor, and meanwhile, the rolling roller is driven to move downwards by a rolling oil cylinder and the outer edge of the rolling oil cylinder drives the blank to rotate.
Through adopting above-mentioned technical scheme, when processing steel ring forging, embrace the roller through two and can restrict the radial removal of blank, and two compression rollers can restrict the axial drunkenness of blank for whole rolling process is more stable, and the blank is difficult for producing crooked and terminal surface convex hull phenomenon, thereby has effectively reduced the rejection rate.
In summary, the invention includes at least one of the following beneficial technical effects:
1. through the arrangement of the first clamping roller and the second clamping roller, the blank can be prevented from being bent and convex hulls can be prevented from being generated on the end face, and the quality of the finally formed steel ring forging piece is effectively guaranteed;
2. through the arrangement of the first sliding chute, the U-shaped plate, the second sliding chute and the L-shaped plate, the first clamping roller and the second clamping roller can move along a straight line and accurately abut against the end face of the blank;
3. through the arrangement of the inserted rod, the supporting plate and the plane bearing, the core roller can be supported, so that the core roller is guaranteed to be not easy to bend when stressed at two ends on average, and the quality of the finally-formed steel ring forging is further guaranteed.
Drawings
FIG. 1 is a schematic overall structure diagram of a vertical ring rolling machine for forging steel ring forgings, which is shown in the first embodiment;
FIG. 2 is a rear view of a work surface shown in accordance with an embodiment;
FIG. 3 is a side view of the table shown in the first embodiment;
FIG. 4 is a side view of the table shown in the first embodiment from another perspective;
FIG. 5 is a top view of the table shown in the first embodiment;
FIG. 6 is a bottom view of the table shown in the first embodiment;
FIG. 7 is a schematic structural diagram of a supporting plate according to an embodiment;
FIG. 8 is an exploded view of the support plate shown in the first embodiment;
FIG. 9 is a flow chart of a forging method for forging a steel ring forging as set forth in example two.
In the figure, 1, a frame; 2. a working surface; 21. a guide rail; 22. a notch; 23. a slider; 24. rolling an oil cylinder; 25. a motor; 3. rolling a roller; 4. a core roll; 41. inserting a rod; 5. a limiting oil cylinder; 51. carrying out roller holding; 6. a work table; 61. a first nip roller; 62. a second nip roller; 63. a first cylinder; 64. a second cylinder; 65. mounting a plate; 651. a first chute; 66. a U-shaped plate; 67. an L-shaped plate; 68. a slider; 69. a second chute; 7. a support plate; 71. a through groove; 72. a jack; 73. mounting grooves; 74. a flat bearing; 75. a yielding groove; 76. a connecting ring; 77. a limiting ring; 78. a bolt; 79. a counter bore; 8. a third chute; 81. a drive slot; 82. connecting blocks; 83. a drive block; 84. a third oil cylinder; 85. a roller; 86. caulking grooves; 87. a guide rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1, the vertical ring rolling machine for forging a steel ring forging disclosed by the invention comprises a frame 1 and a working surface 2 arranged on the frame 1, wherein a guide rail 21 which runs from top to bottom is arranged on the working surface 2, a sliding block 23 is arranged on the guide rail 21 in a sliding manner, a rolling roller 3 is rotatably arranged on the side surface of the sliding block 23 close to the front end of the ring rolling machine, a motor 25 is arranged at one end of the sliding block 23 far away from the rolling roller 3 in combination with fig. 2, and a driving shaft of the motor 25 is connected with the sliding block 23 through a bearing and is coaxially connected with the rolling roller 3 and is used for driving the rolling roller 3 to rotate; and a rolling oil cylinder 24 is further arranged at the top end of the working surface 2, and a piston rod of the rolling oil cylinder 24 is vertically downward and connected with the top end of the sliding block 23 and used for driving the sliding down to move up and down along the sliding rail.
Referring to fig. 1, a core roll 4 is disposed on the working surface 2 and right below the rolling roll 3, and one end of the core roll 4 is connected to the working surface 2 through a bearing. The working face 2 is provided with limiting oil cylinders 5 on the left lower side and the right lower side of the core roller 4, and piston rods of the limiting oil cylinders 5 face the core roller 4 and are connected with the holding rollers 51. The included angle between the working surface 2 and the horizontal plane is more than 80 degrees and less than 90 degrees, the included angle between the working surface 2 and the horizontal plane is 85 degrees in the embodiment, the core roller 4 is vertical to the working surface 2, and the height of one end, close to the working surface 2, of the core roller 4 is lower than that of the other end of the core roller. Referring to fig. 2, a working table 6 is fixedly disposed on the frame 1 below the core roll 4, and a notch 22 for allowing one end of the working table 6 to pass through is disposed on the working surface 2.
Referring to fig. 3, a first nip roller 61 and a second nip roller 62 are disposed on the top surface of the working table 6, and the first nip roller 61 and the second nip roller 62 are configured to respectively abut against two axial end surfaces of the steel ring blank. Specifically, the first nip roller 61 and the second nip roller 62 are both circular truncated cones, and the side surfaces of the first nip roller 61 and the second nip roller 62 can be abutted against the corresponding end surfaces of the steel ring blank. The first clamping roller 61 is located on one side, far away from the working surface 2, of the core roller 4 and is connected with a first oil cylinder 63, referring to fig. 4, the second clamping roller 62 is located on one side, far away from the core roller 4, of the working surface 2 and is connected with a second oil cylinder 64, after the steel ring blank is sleeved on the core roller 4, the first clamping roller 61 can be driven to move towards the working surface 2 through the first oil cylinder 63, and the second clamping roller 62 is driven to move towards the first clamping roller 61 through the second oil cylinder 64, so that the steel ring blank is clamped tightly.
Referring to fig. 3, the cylinder body of the first cylinder 63 is connected to a mounting plate 65 through a vertical plate, and the mounting plate 65 is fixed to the top surface of the table 6. A piston rod of the first cylinder 63 is connected with a U-shaped plate 66, an opening of the U-shaped plate 66 faces the working surface 2 (refer to fig. 1), and both the top end and the bottom end of the first nip roller 61 are rotatably connected with the U-shaped plate 66 through bearings. The top end of the mounting plate 65 is provided with a first sliding groove 651 along the extension direction of the piston rod of the first oil cylinder 63, and the bottom end of the U-shaped plate 66 extends into the first sliding groove 651 and is in sliding fit with the first sliding groove 651, so that the first clamping roller 61 can be guaranteed to move along a straight line.
Referring to fig. 4, the body of the second cylinder 64 is also connected to the top surface of the table 6 through a vertical plate, and the piston rod of the second cylinder 64 faces the first cylinder 63 and is connected to an L-shaped plate 67. The bottom end of the L-shaped plate 67 is provided with a slide block 68, the top end of the second clamping roller 62 is rotatably connected with the L-shaped plate 67 through a bearing, and the bottom end of the second clamping roller 62 is rotatably connected with the slide block 68 through a bearing. The top surface of the working table 6 is provided with a second sliding groove 69 along the extension direction of the piston rod of the second oil cylinder 64, and the sliding block 68 is arranged in the second sliding groove 69 in a sliding manner.
Referring to fig. 3, an end of the core roll 4 remote from the work surface 2 (see fig. 1) is provided with an insert rod 41, and the diameter of the insert rod 41 is smaller than that of the core roll 4. A supporting plate 7 is arranged on the top surface of the workbench 6 and on one side of the core roller 4 away from the working surface 2, and a through groove 71 for the first clamping roller 61 and the U-shaped plate 66 to pass through is arranged on the supporting plate 7. The table 6 is provided with a driving unit for driving the support plate 7 to move toward the core roller 4, and the support plate 7 is provided with an insertion hole 72 having the same diameter as the insertion rod 41 and into which the insertion rod 41 is inserted.
Referring to fig. 5 and 6, a third slide groove 8 is provided on the top surface of the table 6 in the moving direction of the support plate 7, and the mounting plate 65 is positioned above the third slide groove 8 and passes through the through groove 71. The driving groove 81 is formed in the bottom wall of the third sliding groove 8 along the moving direction of the supporting plate 7, the driving assembly comprises a connecting block 82, a driving block 83 and a third oil cylinder 84, the connecting block 82 slides and is arranged in the third sliding groove 8, the top end of the connecting block 82 is connected with the bottom end of the supporting plate 7, the bottom end of the connecting block 82 is connected with the driving block 83, and one end, far away from the connecting block 82, of the driving block 83 penetrates through the driving groove 81 and stretches out of the lower portion of the workbench 6. The cylinder body of the third oil cylinder 84 is connected with the workbench 6, and the piston rod of the third oil cylinder 84 is connected with the driving block 83 and used for driving the supporting plate 7 to slide along the length direction of the third sliding chute 8.
Referring to fig. 5, the bottom wall of the third sliding chute 8 and the two sides of the driving groove 81 are provided with inserting grooves 86, and the inserting grooves 86 are arranged along the moving direction of the supporting plate 7. A plurality of rollers 85 are arranged in the caulking groove 86 along the moving direction of the supporting plate 7, the axial direction of each roller 85 is arranged along the width direction of the third sliding groove 8, each roller 85 is connected with the caulking groove 86 through a connecting shaft, and the top of each roller 85 extends out of the caulking groove 86 to be abutted against the bottom end of the connecting block 82. Referring to fig. 6, a guide rod 87 is disposed in the driving groove 81 along the axial direction of the third cylinder 84, and a guide hole through which the guide rod 87 passes and which is slidably engaged with the guide rod 87 is disposed in the driving block 83.
Referring to fig. 7 and 8, the support plate 7 is provided with a relief groove 75 on a side wall thereof adjacent to the core roller 4 (see fig. 4), a mounting groove 73 is provided on a bottom wall of the relief groove 75, the insertion hole 72 is provided on a bottom wall of the mounting groove 73, and inner diameters of the relief groove 75, the mounting groove 73, and the insertion hole 72 are sequentially reduced and stepped. The mounting groove 73 is connected with a plane bearing 74, the inner diameter of a loose ring and the inner diameter of a tight ring of the plane bearing 74 are both larger than the diameter of the inserted rod 41, the tight ring of the plane bearing 74 is positioned in the mounting groove 73 and abutted against the bottom wall of the mounting groove 73, and the loose ring of the plane bearing 74 extends out of the yielding groove 75. The outer side wall of the tight ring of the plane bearing 74 is fixedly provided with a connecting ring 76, and the connecting ring 76 is positioned in the mounting groove 73, and the end surface of the connecting ring 76 close to the loose ring is flush with the bottom wall of the abdicating groove 75. A limiting ring 77 is arranged in the abdicating groove 75, the inner diameter of the limiting ring 77 is larger than the outer diameter of the tightening ring of the plane bearing 74 and smaller than the outer diameter of the limiting ring 77, the limiting ring 77 is connected with the bottom wall of the abdicating groove 75 through a bolt 78, specifically, 4 counter bores 79 are arranged on the limiting ring 77, and the bolt head of the bolt 78 is positioned in the counter bores 79.
The implementation principle of the above embodiment is as follows:
in the initial state, the first nip roller 61 and the support plate 7 are both located on one side of the core roller 4 away from the working surface 2, the second nip roller 62 is located on one side of the working surface 2 away from the core roller 4, the two holding rollers 51 are both in the withdrawing state, and the rolling roller 3 is located above the core roller 4.
After the steel ring blank is sleeved on the core roller 4, the steel ring blank is accurately corresponding to the rolling roller 3 above the core roller 4 through tools such as fire tongs, metal rods and the like. Then, the two holding rollers 51 are driven to abut against the outer side wall of the steel ring blank through the limiting oil cylinder 5; the third oil cylinder 84 drives the supporting plate 7 to move towards the core roller 4, and when the inserting rod 41 is inserted into the inserting hole 72 and one end of the core roller 4 close to the inserting rod 41 is abutted against the loose ring of the plane bearing 74, the third oil cylinder 84 is closed; the first oil cylinder 63 drives the first clamping roller 61 to move towards the steel ring blank direction, and the second oil cylinder 64 drives the second clamping roller 62 to move towards the steel ring blank direction, so that the first clamping roller 61 and the second clamping roller 62 respectively abut against two end faces of the steel ring blank.
At this time, the rolling roller 3 is driven to rotate by the motor 25, and the outer edge of the rolling roller 3 is driven to abut against the steel ring blank by the rolling oil cylinder 24, so that the steel ring blank can be driven to rotate, and the rolling forming process of thinning the blank and expanding the diameter is realized. Because the two holding rollers 51 limit the radial movement trend of the blank, and the two clamping rollers limit the axial movement trend of the blank, the blank is not easy to swing in the rotation process, so that the blank is not easy to bend or deform, and the end surface of the blank can also be kept flat.
Example two
Referring to fig. 9, the invention discloses a forging method for forging a steel ring forging based on a vertical ring rolling machine for forging a steel ring forging in the first embodiment, which includes the following steps:
s100, discharging: sleeving a steel ring blank which is heated and punched with a small hole on a core roller 4 of a ring rolling machine, and aligning the steel ring blank with the position of a rolling roller 3 through a fire tongs;
s200, positioning: the two holding rollers 51 are driven to abut against the outer side wall of the steel ring blank through the limiting oil cylinder 5, meanwhile, the two clamping rollers are driven to abut against the two end faces of the steel ring blank through the first oil cylinder 63 and the second oil cylinder 64, and finally, the supporting plate 7 is driven to move towards the core roller 4 through the third oil cylinder 84, and one end, close to the inserted rod 41, of the core roller 4 abuts against the loose ring of the plane bearing 74;
s300, ring grinding: the rolling roller 3 is driven to rotate by a motor 25, and meanwhile, the rolling roller 3 is driven to move downwards by a rolling oil cylinder 24, and the periphery of the rolling roller drives the blank to rotate.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. A vertical ring rolling machine for forging steel ring forgings comprises a rack (1) and a working surface (2) arranged on the rack (1), wherein a guide rail (21) which runs from top to bottom is arranged on the working surface (2), and a rolling roller (3) which can slide along the guide rail (21) is arranged on the guide rail (21); a core roller (4) is arranged on the working surface (2) and below the rolling roller (3), limiting oil cylinders (5) are arranged on the working surface (2) and on the left lower side and the right lower side of the core roller (4), and piston rods of the limiting oil cylinders (5) face the core roller (4) and are connected with the holding rollers (51); the device is characterized in that a workbench (6) is arranged on the frame (1) and below the core roller (4), and a notch (22) for one end of the workbench (6) to pass through is arranged on the working surface (2); a first clamping roller (61) and a second clamping roller (62) which are used for respectively abutting against two axial end faces of the steel ring blank are arranged on the top surface of the workbench (6); the first clamping roller (61) is positioned on one side, away from the working surface (2), of the core roller (4) and is connected with a first oil cylinder (63) for driving the first clamping roller to move towards the working surface (2), and the second clamping roller (62) is positioned on one side, away from the core roller (4), of the working surface (2) and is connected with a second oil cylinder (64) for driving the second clamping roller to move towards the first clamping roller (61);
the included angle between the working surface (2) and the horizontal plane is more than 80 degrees and less than 90 degrees, the core roller (4) is vertical to the working surface (2), and the height of one end, close to the working surface (2), of the core roller (4) is lower than that of the other end of the core roller; the first clamping roller (61) and the second clamping roller (62) are both in a circular truncated cone shape, and the side surfaces of the first clamping roller (61) and the second clamping roller (62) can be abutted against the corresponding end surfaces of the steel ring blank;
the cylinder body of the first oil cylinder (63) is connected with an installation plate (65), and the installation plate (65) is fixed on the top surface of the workbench (6); a piston rod of the first oil cylinder (63) is connected with a U-shaped plate (66), and the top end and the bottom end of the first clamping roller (61) are rotatably connected with the U-shaped plate (66) through bearings; the top end of the mounting plate (65) is provided with a first sliding groove (651) along the length direction of the piston rod of the first oil cylinder (63), and the bottom end of the U-shaped plate (66) extends into the first sliding groove (651) and is in sliding fit with the first sliding groove (651);
the cylinder body of the second oil cylinder (64) is connected with the top surface of the workbench (6), the piston rod of the second oil cylinder (64) is connected with an L-shaped plate (67), and the bottom end of the L-shaped plate (67) is provided with a sliding block (68); the top end of the second clamping roller (62) is rotatably connected with the L-shaped plate (67) through a bearing, and the bottom end of the second clamping roller (62) is rotatably connected with the sliding block (68) through a bearing; the top surface of workstation (6) is provided with second spout (69) along the length direction of second hydro-cylinder (64) piston rod, slider (68) are located second spout (69) and with second spout (69) sliding fit.
2. The vertical ring rolling machine for forging steel ring forgings according to claim 1, wherein an end of the core roll (4) far away from the working surface (2) is provided with an insert rod (41), and the diameter of the insert rod (41) is smaller than that of the core roll (4); a supporting plate (7) is arranged on the top surface of the workbench (6) and on one side, away from the working surface (2), of the core roller (4), and a through groove (71) for the first clamping roller (61) to pass through is formed in the supporting plate (7); the working table (6) is provided with a driving component for driving the supporting plate (7) to move towards the core roller (4), and the supporting plate (7) is provided with an insertion hole (72) for inserting the insertion rod (41).
3. The vertical ring rolling machine for forging steel ring forgings according to claim 2, wherein a third sliding groove (8) is formed in the top surface of the workbench (6) along the moving direction of the support plate (7), and a driving groove (81) is formed in the bottom wall of the third sliding groove (8) along the moving direction of the support plate (7); the driving assembly comprises a connecting block (82), a driving block (83) and a third oil cylinder (84);
the connecting block (82) is arranged in the third sliding groove (8) in a sliding mode, the top end of the connecting block (82) is connected with the bottom end of the supporting plate (7), and the bottom end of the connecting block (82) is connected with the driving block (83); one end, far away from the connecting block (82), of the driving block (83) penetrates through the driving groove (81) and extends out of the lower portion of the workbench (6), a cylinder body of the third oil cylinder (84) is connected with the workbench (6), and a piston rod of the third oil cylinder (84) is connected with the driving block (83) and used for driving the supporting plate (7) to move along the direction of the third sliding groove (8).
4. The vertical ring rolling machine for forging steel ring forgings according to claim 3, wherein a plurality of rollers (85) are distributed on the bottom wall of the third sliding groove (8) and on both sides of the driving groove (81) along the moving direction of the support plate (7), and the rollers (85) are abutted against the bottom end of the connecting block (82).
5. The vertical ring rolling machine for forging the steel ring forgings as claimed in claim 3, wherein a guide rod (87) is arranged in the driving groove (81) along the axial direction of the third oil cylinder (84), and a guide hole for the guide rod (87) to pass through and to be in sliding fit with the guide rod (87) is formed in the driving block (83).
6. The vertical ring rolling machine for forging steel ring forgings according to claim 2, wherein the side wall of the supporting plate (7) close to the core roller (4) is provided with a mounting groove (73), and the insertion hole (72) is positioned on the bottom wall of the mounting groove (73); the mounting groove (73) is connected with a plane bearing (74), and the inner diameter of a loose ring and the inner diameter of a tight ring of the plane bearing (74) are both larger than the diameter of the inserted rod (41); the tight ring of plane bearing (74) is located mounting groove (73) and is connected with the diapire of mounting groove (73), the loose ring of plane bearing (74) stretches out outside mounting groove (73).
7. The vertical ring rolling machine for forging steel ring forgings according to claim 6, wherein the side wall of the support plate (7) close to the core roller (4) is provided with an abdicating groove (75), and the mounting groove (73) is positioned on the bottom wall of the abdicating groove (75); a connecting ring (76) is arranged between the outer side wall of the tight ring of the plane bearing (74) and the inner wall of the mounting groove (73), and the connecting ring (76) is fixedly connected with the tight ring of the plane bearing (74); be provided with spacing ring (77) in groove (75) of stepping down, the internal diameter of spacing ring (77) is greater than the external diameter of the tight ring of plane bearing (74) and is less than the external diameter of spacing ring (77), spacing ring (77) pass through bolt (78) with the diapire in groove (75) of stepping down and be connected.
8. A forging method for forging a steel ring forging, characterized in that the forging method is based on the vertical ring rolling machine for forging a steel ring forging of claim 1, comprising the steps of:
s100, discharging: sleeving a steel ring blank which is heated and punched with a small hole on a core roller (4) of a ring rolling machine, and aligning the steel ring blank with the position of a rolling roller (3);
s200, positioning: the two holding rollers (51) are driven to abut against the outer side wall of the steel ring blank through the limiting oil cylinder (5), and the two clamping rollers are driven to abut against the two end faces of the steel ring blank through the first oil cylinder (63) and the second oil cylinder (64) respectively;
s300, ring rolling: the rolling roller (3) is driven to rotate by a motor (25), and meanwhile, the rolling roller (3) is driven to move downwards by a rolling oil cylinder (24) and the blank is driven to rotate by the outer edge of the rolling roller.
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| CN111673025B (en) * | 2020-06-17 | 2022-03-22 | 定襄县同立重工有限公司 | Forging process of GCr15 roller sleeve |
| CN116765307B (en) * | 2023-07-10 | 2024-03-08 | 浙江万鼎玄铁科技有限公司 | Forging tool for aluminum alloy suspension arm |
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