Roller cross rolling apparatus and method for continuous feeding in circumferential direction

Abstract

This invention relates to the field of metal plastic forming technology and equipment, and provides a continuous circumferential feeding roll rolling device and method. The device includes a storage rack, a feeding roller, and an inclined cross-rolling mill. The inclined cross-rolling mill includes an upper roll and a lower roll, with a second material trough and a third material trough respectively on the upper and lower rolls. A first material trough is provided on the feeding roller. The feeding roller is positioned obliquely above the upper roll. The axes of the feeding roller and the upper and lower rolls are parallel to each other and located in the same plane, which forms a set angle with the horizontal plane. The diameters of the feeding roller and the upper and lower rolls are the same. This invention achieves integrated feeding, rolling, and unloading, and the feeding and unloading speeds can be synchronously adjusted with the roll rotation speed. The feeding state is stable and time-saving and efficient. This invention has the advantages of significantly improving the production efficiency of shaft parts, low energy consumption, and saving labor costs. It can be used to realize the automated rolling production of large batches of shaft parts and has broad application prospects.

Description

Technical Field

[0001] This invention relates to the field of metal plastic forming technology and equipment, and in particular to a roller cross rolling device and method for continuous circumferential feeding. Background Technology

[0002] The working principle of cross rolling is that the workpiece moves parallel to the roll axis and opposite to the roll rotation direction between two rolls rotating in the same direction. Due to its high efficiency, cross rolling is widely used in the production of blanks for shaft parts in automobiles, tractors, and motorcycles, as well as for providing preforms for forgings. It is also used to roll threads, gears, and other parts. Small and medium-sized shaft parts and preforms are used in large quantities in the automotive, shipbuilding, and aerospace industries. While cross rolling itself is already characterized by its speed and efficiency, further improvements in rolling efficiency require efficient material feeding and unloading methods to gradually achieve automated production. Automated production not only increases production speed but also reduces production costs.

[0003] Currently, cross rolling primarily uses axial automatic ejection to feed bar stock into the designated rolling position. Axial ejection is a discontinuous feeding method, meaning that after each rolling cycle, the rolls must stop at a fixed position to await the next billet to be pushed into the designated position. An existing wedge-type cross rolling circumferential feeding device works by having a receiving unit cooperate with an arc-shaped slide rail to allow the billet to slide along the rail to the designated rolling position. This method is also a discontinuous feeding method and is suitable for rolling large shaft parts. However, it cannot meet the requirements for fast and efficient rolling of small shaft parts. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a continuous circumferential feeding roll mill device and method. This method significantly improves efficiency and is particularly suitable for feeding and rolling small shaft parts. Batches of billets to be rolled are placed directly on the inclined surface of the storage rack. Under gravity, the billets enter the inclined mill one by one, and are then discharged one by one after rolling. This method allows the rolls to rotate continuously during the feeding and rolling process, enabling the mill to operate for extended periods with a single feeding operation. The feeding speed can be adjusted synchronously by adjusting the roll speed as needed, achieving the goal of high-efficiency and rapid rolling.

[0005] The present invention adopts the following technical solution:

[0006] On one hand, the present invention provides a roller cross-rolling device with continuous circumferential feeding, including a storage rack, feeding rollers and an inclined cross-rolling mill;

[0007] The inclined horizontal rolling mill includes an upper roll and a lower roll. A mold is provided on both the upper roll and the lower roll. A second material trough and a third material trough are respectively provided on the upper roll and the lower roll. The second material trough is located at the starting point of the upper roll mold, and the third material trough is located at the ending point of the lower roll mold. A first material trough is provided on the feeding roller.

[0008] The feeding roller is positioned diagonally above the upper roller; the axes of the feeding roller, the upper roller, and the lower roller are all parallel to each other and located in the same plane, which forms a set angle with the horizontal plane; the diameters of the feeding roller, the upper roller, and the lower roller are all the same.

[0009] When the first material trough of the feeding roller rotates to the inlet of the storage rack, the billet to be rolled on the storage rack falls into the first material trough; the feeding roller continues to rotate, and the first material trough carries the billet to the intersection with the upper roll, at which point the billet falls into the second material trough; the upper roll continues to rotate, and the second material trough carries the billet to the intersection with the lower roll, sending the billet to the rolling position, where the billet is rolled into shape under the combined action of the upper and lower rolls; the rolled part obtained after rolling falls into the third material trough when the third material trough rotates to the rolling position; the lower roll continues to rotate, and the third material trough carries the rolled part to the outlet end.

[0010] In addition to any of the possible implementations described above, a further implementation is provided in which a guide plate is provided at the gap between the upper and lower rolls, and the guide plate consists of two pieces, upper and lower, with the position between the two guide plates being the rolling position.

[0011] In addition to any of the possible implementations described above, another implementation is provided in which the feeding roller, upper roll, and lower roll are all equipped with a pressure device to prevent the bar billet or rolled part from falling out of the groove during rotation.

[0012] In addition to any of the possible implementations described above, another implementation is provided in which the pressure device corresponding to the feeding roller is a feed protection cover with an arc-shaped structure, the inner arc of which is concentric with the cross-sectional circle of the feeding roller.

[0013] In addition to any of the possible implementations described above, another implementation is provided in which the pressure device corresponding to the upper roll and the lower roll is composed of several arc-shaped steel bars, and the inner arc of the arc-shaped steel bars is concentric with the cross-sectional circle of the upper roll or the lower roll, respectively.

[0014] In addition to any of the possible implementations described above, another implementation is provided in which the plane containing the axes of the feeding roller, the upper roll, and the lower roll makes an angle of 20°-40° with the horizontal plane.

[0015] In addition to any of the possible implementations described above, a further implementation is provided in which the storage rack includes an inclined surface, and the bar billets are fed sequentially downward along the inclined surface and enter the first material trough of the feeding roller at the end of the inclined surface; two clamping plates are installed on both sides of the inclined surface to ensure that the two ends of the bar billets to be rolled are flush during feeding.

[0016] In addition to any of the possible implementations described above, a further implementation is provided in which the spacing between the two clamping plates is adjustable to accommodate bar billets of different lengths.

[0017] In addition to any of the possible implementations described above, another implementation is provided in which the feeding roller and the upper roller are connected by a chain drive, and when the upper roller rotates, the power is provided by the main shaft of the upper roller, which drives the feeding roller to rotate through the chain.

[0018] On the other hand, the present invention also provides a method for continuous circumferential feeding roll cross rolling, the method using the above-mentioned continuous circumferential feeding roll cross rolling apparatus, the method comprising:

[0019] S1. The billet is placed in the storage rack. When the first material trough of the feeding roller rotates to the entrance of the storage rack, the billet at the front end falls into the first material trough under the action of gravity.

[0020] S2. The feeding rollers continue to rotate, and the first material trough carries the billet to rotate until it intersects with the upper roller. The billet then falls into the second material trough.

[0021] S3. The upper roll continues to rotate, and the second material trough carries the billet to the rolling position when it intersects with the lower roll. The billet falls into the rolling position defined by the two guide plates under the action of gravity. The billet is rolled into shape under the combined action of the upper roll and the lower roll.

[0022] S4. After rolling, the rolled part falls into the third material trough under the action of gravity when the third material trough rotates to the rolling position; the lower roll continues to rotate, and the third material trough carries the rolled part to the discharge end, completing one feeding and discharging cycle.

[0023] S5. The feeding roller, upper roll, and lower roll rotate continuously. When the previous bar billet begins to be rolled, the next bar billet simultaneously enters the first material trough. Repeat steps S1-S4 to achieve continuous and uninterrupted feeding and discharging.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. When the device of the present invention is in operation, as the first billet begins rolling, the next billet immediately enters the first material groove of the feeding roller. After the first billet is rolled, it is immediately carried out by the third material groove of the lower roller, and the second billet to be rolled immediately enters the rolling position for rolling. This greatly shortens the production time compared with the traditional axial pushing device.

[0026] 2. The device of the present invention is a continuous feeding device, which can realize continuous rolling and feeding and discharging, and improve the rolling production efficiency of small shaft parts or shaft blanks. During the material transportation process, the device of the present invention makes reasonable use of the rotation power of the rolls and the gravity of the blank to be rolled, so no additional power input is required, thus achieving the purpose of saving energy and reducing costs. The device of the present invention can continuously roll after one feeding, reducing the feeding operation procedures and making it suitable for mass production.

[0027] 3. The device of the present invention has a simple structure, good stability, saves equipment space, and has broad application prospects. Attached Figure Description

[0028] Figure 1 The diagram shown is a schematic diagram of the structural principle of a roller-type cross-rolling device with continuous circumferential feeding according to an embodiment of the present invention.

[0029] Figure 2 The diagram shown is a schematic diagram of the internal structure of a roller-type cross-rolling device with continuous circumferential feeding according to an embodiment.

[0030] Figure 3 The diagram shown is a structural schematic of the storage rack in the embodiment.

[0031] Figure 4 The diagram shown is a schematic of the installation structure of the feeding roller and the feeding protection device in the embodiment.

[0032] Figure 5 The diagram shown illustrates the function of the pressure feeder in this embodiment.

[0033] In the diagram: 1-Ball blank to be rolled; 2-Feeding roller; 3-Upper roll; 4-Guide plate; 5-Lower roll; 6-Material trough; 61-First material trough; 62-Second material trough; 63-Third material trough; 7-Storage rack; 8-Chain; 9-Pressure feeder; 10-Feed protection cover. Detailed Implementation

[0034] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered in isolation, but can be combined with each other to achieve better technical effects.

[0035] like Figure 1As shown, this is a schematic diagram of the principle of a roller cross-rolling device with continuous circumferential feeding according to an embodiment of the present invention, which is particularly suitable for the feeding and discharging of small shaft parts or shaft blanks.

[0036] like Figure 2 As shown, an embodiment of the present invention provides a roller-type cross-rolling device with continuous circumferential feeding, comprising a storage rack 7, a feeding roller 2, and an inclined cross-rolling mill;

[0037] The inclined horizontal rolling mill includes an upper roll 3 and a lower roll 5. The upper roll 3 and the lower roll 5 are respectively provided with a second material groove 62 and a third material groove 63. The feeding roller 2 is provided with a first material groove 61. The first, second, and third material grooves 61, 62, and 63 are all adapted to the size of the bar billet 1.

[0038] The feeding roller 2 is positioned diagonally above the upper roller 3, such as... Figure 4 The feed roller 2 and feed guard 10 shown are installed on the inclined horizontal rolling mill stand. Since the horizontal rolling mill stand is not a major component, therefore... Figure 4 The following is omitted: The axes of the feeding roller 2, the upper roller 3, and the lower roller 5 are all parallel to each other and located in the same plane, which forms a set angle with the horizontal plane; The base circle diameters of the feeding roller 2, the upper roller 3, and the lower roller 5 are all the same.

[0039] When the first material trough 61 of the feeding roller 2 rotates to the inlet of the storage rack 7, the billet 1 to be rolled on the storage rack 7 falls into the first material trough 61; the feeding roller 2 continues to rotate, and the first material trough 61 carries the billet 1 to the intersection with the upper roll 3, at which point the billet 1 falls into the second material trough 62; the upper roll 3 continues to rotate, and the second material trough 62 carries the billet 1 to the intersection with the lower roll 5, sending the billet 1 to the rolling position, where the billet 1 is rolled into shape under the combined action of the upper roll 3 and the lower roll 5; the rolled part obtained after rolling falls into the third material trough 63 when the third material trough 63 rotates to the rolling position; the lower roll 5 continues to rotate, and the third material trough 63 carries the rolled part to the discharge end.

[0040] In one specific embodiment, the detachable part of the feeding roller 2 is as follows: Figure 4 The structure shown is fixed on the inclined horizontal rolling mill stand, and the size of the feed port can be adjusted according to the size of the rolled bar billet 1.

[0041] In one specific embodiment, a guide plate 4 is provided at the gap between the upper roll 3 and the lower roll 5. The guide plate 4 consists of two pieces, upper and lower, and the position between the two guide plates 4 is the rolling position. The rolling position is a semi-open cavity formed by the upper and lower rolls 3 and 5 and the upper and lower guide plates 4.

[0042] Because the plane defined by the two roller shafts of the rolling mill is inclined at a certain angle to the ground, the billet 1 to be rolled is at risk of prematurely leaving the material trough of the rollers as it moves with the upper and lower rollers 3 and 5. In order to prevent the billet 1 to be rolled from prematurely leaving the rollers as it moves with the rollers, a pressure device 9 is installed above the rollers on the frame, and the billet 1 to be rolled is restricted in the material trough 6 by the pressure device 9.

[0043] In one specific embodiment, the feeding roller 2, the upper roller 3, and the lower roller 5 are all equipped with a pressure device 9 to prevent the bar billet 1 or the rolled part from falling out of the groove during rotation.

[0044] like Figure 4 As shown, in one specific embodiment, the pressure device corresponding to the feeding roller 2 is a feed protection cover 10, which has an arc-shaped structure. The inner arc of the arc-shaped structure is concentric with the cross-sectional circle of the feeding roller 2. The purpose is to prevent the billet 1 to be rolled from prematurely leaving the material trough 6 during transportation, which could cause the rolling mill to jam.

[0045] like Figure 5 As shown, in one specific embodiment, the pressure device 9 corresponding to the upper roll 3 and the lower roll 5 is composed of several arc-shaped steel bars, and the inner arc of the arc-shaped steel bars is concentric with the cross-sectional circle of the upper roll 3 or the lower roll 5 respectively.

[0046] In one specific embodiment, the material conveying method via rollers 3 and 5 needs to be used in conjunction with a pressure device 9 installed on the mill stand. The function of the pressure device 9 is to restrict the rolled bar billet 1 within the material trough 6 during the material conveying process and prevent it from falling out prematurely, thus ensuring the stability of the feeding and discharging process.

[0047] In one specific embodiment, the plane containing the axes of the feeding roller 2, the upper roller 3, and the lower roller 5 makes an angle α with the horizontal plane of 20°-40°.

[0048] like Figure 3 As shown, in one specific embodiment, the storage rack 7 includes an inclined slope, and the bar billet 1 is fed downwards along the inclined slope in sequence, entering the first material trough 61 of the feeding roller 2 at the end of the inclined slope; two clamping plates are installed on both sides of the inclined slope to ensure that the two ends of the bar billet 1 to be rolled are flush during feeding.

[0049] In one specific embodiment, the inclined surface of the storage rack 7 has an inclination angle of 15° to ensure that the billet 1 can roll smoothly on the inclined surface.

[0050] In one specific embodiment, the spacing between the two clamping plates is adjustable to accommodate bar billets 1 of different lengths and to accurately control the axial position of the rolled bar billet 1.

[0051] In one specific embodiment, a lead screw is provided in the middle of the two clamping plates. Tightening the lead screw forces the two ends of the billet 1 on the inclined surface to align, so that the axial position error of the billet 1 to be rolled is minimized after it enters the rolling mill.

[0052] In one specific embodiment, the feeding roller 2 and the upper roller 3 are connected by a chain drive. When the upper roller 3 rotates, the power is provided by the main shaft of the upper roller 3, which drives the feeding roller 2 to rotate through the chain.

[0053] This invention provides a method for continuous circumferential feeding roll cross rolling, the method using the aforementioned continuous circumferential feeding roll cross rolling apparatus, the method comprising:

[0054] S1, feeding roller 2, upper roller 3, and lower roller 5 rotate in the same direction; bar billet 1 is placed in storage rack 7. When the first material trough 61 of feeding roller 2 rotates to the inlet of storage rack 7, the foremost bar billet 1 falls into the first material trough 61 under the action of gravity.

[0055] S2. The feeding roller 2 continues to rotate. When the first material trough 61 carries the billet 1 and rotates to intersect with the upper roller 2, the billet 1 falls into the second material trough 62.

[0056] S3. The upper roller 3 continues to rotate. When the second material trough 62 carries the billet 1 to the rolling position when it intersects with the lower roller 5, the billet 1 falls into the rolling position defined by the two guide plates 4 under the action of gravity. The billet 1 is rolled into shape under the combined action of the upper roller 3 and the lower roller 5.

[0057] S4. When the rolled part obtained after rolling is rotated to the rolling position in the third material trough 63, it falls into the third material trough 63 under the action of gravity; the lower roller 5 continues to rotate, and the third material trough 63 carries the rolled part to the discharge end, completing one feeding and discharge cycle.

[0058] S5. Feeding roller 2, upper roller 3, and lower roller 5 rotate continuously. When the previous bar billet 1 starts rolling, the next bar billet 1 enters the first material trough 61 at the same time. Repeat steps S1-S4 to achieve continuous and uninterrupted feeding and discharging.

[0059] In one specific embodiment, the rolled part is fed out by the lower roller 5 and slides directly into the receiving box in the receiving chute.

[0060] In one specific embodiment, the rotational power of the feeding roller 2 is transmitted by a sprocket chain connected to the main shaft of the upper roller 3, with a transmission ratio of 1:1.

[0061] In one specific embodiment, the upper and lower rollers 3 and 5, and the feeding roller 2 always maintain synchronous and constant rotation speed during operation. In the initial state, the material groove of the upper roller 3 and the material groove of the feeding roller 2 are 180° apart.

[0062] In one specific embodiment, the bar blanks 1 are all short round bars.

[0063] In one specific embodiment, the rotation of the upper roller 3 and the lower roller 5 is driven by two servo motors, and the power of the feeding roller 2 comes from the chain connected to the upper roller 3.

[0064] When the device of this invention is in operation, as the first bar billet 1 begins rolling, the next bar billet 1 immediately enters the first material groove 61 of the feeding roller 2. After the first bar billet 1 is rolled, it is immediately carried out by the third material groove 63 of the lower roller 5, and the second bar billet 1 to be rolled immediately enters the rolling position for rolling. This shortens the production time compared with the traditional axial pushing device.

[0065] The device and method of this invention can promote the efficient and rapid completion of rolling operations. This device is a continuous feeding device, which can continuously complete the feeding and discharging process without stopping the rolling mill, and is particularly suitable for feeding and discharging small batches of cross-rolled shaft parts. The principle of this invention is simple, makes full use of the characteristics of the rolling mill itself, and is convenient for feeding and discharging, highly efficient and saves equipment space.

[0066] While several embodiments of the present invention have been provided herein, those skilled in the art should understand that modifications can be made to these embodiments without departing from the spirit of the invention. The above embodiments are merely exemplary and should not be construed as limiting the scope of the invention.

Claims

1. A roller-type cross-rolling device with continuous circumferential feeding, characterized in that, The device includes a storage rack, feeding rollers, and an inclined horizontal rolling mill; The inclined horizontal rolling mill includes an upper roll and a lower roll. A mold is provided on both the upper roll and the lower roll. A second material trough and a third material trough are respectively provided on the upper roll and the lower roll. The second material trough is located at the starting point of the upper roll mold, and the third material trough is located at the ending point of the lower roll mold. A first material trough is provided on the feeding roller. The feeding roller is positioned diagonally above the upper roller; the axes of the feeding roller, the upper roller, and the lower roller are all parallel to each other and located in the same plane, which forms a set angle with the horizontal plane; the diameters of the feeding roller, the upper roller, and the lower roller are all the same. When the first material trough of the feeding roller rotates to the inlet of the storage rack, the billet to be rolled on the storage rack falls into the first material trough; the feeding roller continues to rotate, and the first material trough carries the billet to the intersection with the upper roll, at which point the billet falls into the second material trough; the upper roll continues to rotate, and the second material trough carries the billet to the intersection with the lower roll, sending the billet to the rolling position, where the billet is rolled into shape under the combined action of the upper and lower rolls; the rolled part obtained after rolling falls into the third material trough when the third material trough rotates to the rolling position; the lower roll continues to rotate, and the third material trough carries the rolled part to the outlet end.

2. The cross-rolling apparatus for circumferentially continuous feeding according to claim 1, wherein A guide plate is provided at the gap between the upper and lower rolls. There are two guide plates, one upper and one lower, and the position between the two guide plates is the rolling position.

3. The cross roll rolling apparatus for continuous circumferential feeding according to claim 1, wherein The feeding rollers, upper rollers, and lower rollers are all equipped with pressure devices to prevent the bar billet or rolled parts from falling out of the groove during rotation.

4. The cross-rolling apparatus for circumferentially continuous feeding according to claim 3, wherein The pressure device corresponding to the feeding roller is a feed protection cover, which has an arc-shaped structure. The inner arc of the arc-shaped structure is concentric with the cross-sectional circle of the feeding roller.

5. The cross-rolling apparatus for circumferentially continuous feeding according to claim 3, wherein The pressure device corresponding to the upper and lower rolls is composed of several arc-shaped steel bars, and the inner arc of the arc-shaped steel bars is concentric with the cross-sectional circle of the upper roll or the lower roll.

6. The cross roll rolling apparatus for continuous circumferential feeding according to claim 1, wherein The plane containing the axes of the feeding roller, upper roll, and lower roll is at an angle of 20°-40° to the horizontal plane.

7. The circumferentially continuously fed roller cross-rolling device as described in claim 1, characterized in that, The storage rack includes an inclined plane, and the bar billets are fed downwards sequentially along the inclined plane, entering the first material trough of the feeding roller at the end of the inclined plane; two clamping plates are installed on both sides of the inclined plane to ensure that the two ends of the bar billets to be rolled are flush during feeding.

8. The cross-rolling apparatus for continuous circumferential feeding according to claim 7, wherein The spacing between the two clamping plates is adjustable to accommodate bar billets of different lengths.

9. The cross roll rolling apparatus for continuous circumferential feeding according to claim 1, wherein The feeding roller and the upper roller are connected by a chain drive. When the upper roller rotates, the power is provided by the main shaft of the upper roller, which drives the feeding roller to rotate through the chain.

10. A method for continuous circumferential feeding in a roll cross-rolling process, characterized in that, The method uses a circumferentially continuously fed roll cross-rolling apparatus as described in any one of claims 1-9, the method comprising: S1. The billet is placed in the storage rack. When the first material trough of the feeding roller rotates to the inlet of the storage rack, the billet at the front end falls into the first material trough under the action of gravity. S2. The feeding rollers continue to rotate, and the first material trough carries the billet to rotate until it intersects with the upper roller. The billet then falls into the second material trough. S3. The upper roll continues to rotate, and the second material trough carries the billet to the rolling position when it intersects with the lower roll. The billet falls into the rolling position defined by the two guide plates under the action of gravity. The billet is rolled into shape under the combined action of the upper roll and the lower roll. S4. After rolling, the rolled part falls into the third material trough under the action of gravity when the third material trough rotates to the rolling position; the lower roll continues to rotate, and the third material trough carries the rolled part to the discharge end, completing one feeding and discharging cycle. S5. The feeding roller, upper roll, and lower roll rotate continuously. When the previous bar billet begins to be rolled, the next bar billet simultaneously enters the first material trough. Repeat steps S1-S4 to achieve continuous and uninterrupted feeding and discharging.

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