Metal powder rolling feed device and method

Abstract

This invention discloses a feeding device and method for metal powder rolling, relating to the field of metal powder rolling equipment. The device includes a feeding hopper with a discharge port at its bottom. Movable side plates of the feeding hopper are slidably connected to a front and rear end plate. A gap adjustment mechanism is installed on the feeding hopper to adjust the position of the movable side plates and change the size of the discharge port. Two sets of stirring shafts are installed inside the feeding hopper, with follower wheels connected to the ends of the stirring shafts for frictional contact with the rolling mill rolls. An adjustable partition mechanism is also installed inside the feeding hopper between the two sets of stirring shafts. Based on this device, the method uses the gap adjustment mechanism in conjunction with a replaceable nozzle insert to synchronously adjust the discharge port size with the roll gap. The angle of the partition is adjusted by the swing adjustment mechanism to control the composite layer thickness ratio, and the rollers drive the follower wheels to rotate the stirring shafts. This invention can improve feeding uniformity, adapt to different roll gap specifications, and achieve precise layer control of composite materials.

Description

Technical Field

[0001] This invention relates to the field of metal powder rolling equipment, and more specifically to a metal powder rolling feeding device and method. Background Technology

[0002] Powder rolling technology is an advanced forming method that directly produces strip from metal powder using a rolling mill. The rolling of stainless steel powder and titanium powder has significant application value in the field of special material preparation. As the core equipment in the powder metallurgy rolling process, the feeding device's function is to uniformly and continuously transport the powder to the roll gap area. The operational stability of this device directly determines the rolling forming quality, production efficiency, and the performance indicators of the final product.

[0003] Current powder rolling feeders still face the following technical challenges in practical applications: First, due to the significant differences in powder characteristics between stainless steel powder and titanium powder, the flowability of different particle sizes (coarse, fine, etc.) varies. Powders prone to agglomeration exhibit unstable flow during feeding, leading to uneven density in the rolled billet. Second, the equipment has poor adaptability to changes in roll gap. When producing products of different thicknesses, only the roll gap can be adjusted, but the outlet size of the feeder remains constant, making it impossible to adjust according to changes in roll gap dimensions, easily resulting in powder leakage or material blockage. Third, in preparing multilayer composite or graded functional materials, it is necessary to simultaneously and separately supply two types of powder in the same hopper and precisely control the transverse proportion of each layer. However, existing devices lack effective layer adjustment mechanisms, resulting in uneven thickness and non-uniform interfaces in the sublayers of the composite plate, making it difficult to meet the rolling process requirements of high-performance composite materials. Summary of the Invention

[0004] This invention proposes a feeding device and method for metal powder rolling, the purpose of which is: firstly, to improve the feeding instability caused by differences in powder flowability and ensure uniform density of the rolled billet; secondly, to improve the adaptability of the feeding device to changes in the roll gap and solve the problem of powder leakage or blockage caused by the inability to adjust the outlet according to the roll gap; and thirdly, to achieve precise control of the isolated supply and transverse ratio of different powders during the rolling process of multi-layer composite or gradient functional materials, so as to ensure uniform thickness and straight interface of each sublayer of the composite plate.

[0005] The technical solution of this invention is as follows:

[0006] A metal powder rolling feeding device includes a feeding hopper installed on a rolling mill stand, the bottom of the feeding hopper is provided with a discharge port, the discharge port is located between two rotating rolling mill rolls on the rolling mill stand, and the feeding hopper includes a front end plate, a rear end plate, a fixed side plate and a movable side plate;

[0007] The front end plate and the rear end plate are fixedly installed relative to the mill frame. The front end and the rear end of the fixed side plate are fixedly connected to the right end of the front end plate and the right end of the rear end plate, respectively. The movable side plate is located between the front end plate and the rear end plate and is slidably connected to the front end plate and the rear end plate in the left and right directions, respectively. The bottom edges of the front end plate, the rear end plate, the fixed side plate and the movable side plate form the discharge port.

[0008] The feed hopper is also equipped with a gap adjustment mechanism for adjusting the position of the movable side plate to change the size of the discharge port.

[0009] The feed hopper is also equipped with two sets of stirring shafts, one on the left and one on the right, with the two ends of the stirring shafts rotatably connected to the front plate and the rear plate, respectively.

[0010] An adjustable baffle mechanism is also installed inside the feed hopper, and the baffle mechanism is located between the two sets of stirring shafts.

[0011] As a further improvement to the metal powder rolling feeding device, the feed hopper also includes a fixing plate connected between the left end of the front plate and the left end of the rear plate;

[0012] The gap adjustment mechanism includes a first housing mounted on a fixed plate, a first worm gear mounted on the first housing via a rotatable connection, and a first worm wheel mounted on the first housing via a rotatable connection and meshing with the first worm gear;

[0013] A threaded rod is fixedly connected to the outer surface of the movable side plate. The threaded rod passes through the fixed plate and engages with the threaded hole on the first worm gear.

[0014] As a further improvement to the metal powder rolling feeding device: the outer side of the movable side plate is provided with two sets of threaded rods, and the fixed plate is provided with two sets of gap adjustment mechanisms corresponding to the threaded rods one by one;

[0015] The first worm gear is horizontally positioned, and the inner ends of the first worm gears of the two sets of gap adjustment mechanisms are connected by a connecting rod to achieve synchronous rotation.

[0016] As a further improvement to the metal powder rolling feeding device: the front end and the rear end of the movable side plate are provided with an upper sliding plate and a lower sliding plate, and the upper sliding plate and the lower sliding plate are respectively slidably engaged with the front end plate or the rear end plate on the corresponding side.

[0017] The sliding plate engages with the grooves on the outer sides of the front and rear plates, and a bearing seat is provided on the sliding plate. The end of the stirring shaft near the movable side plate passes through the waist-shaped hole on the front or rear plate and is rotatably connected to the bearing seat via a bearing, so as to realize the synchronous movement of the stirring shaft and the movable side plate.

[0018] As a further improvement to the metal powder rolling feeder, the end of the stirring shaft is also connected to a follower wheel located outside the feed hopper, which is used to make frictional contact with the surface of the rolling mill rolls.

[0019] As a further improvement to the metal powder rolling feeder: the partition mechanism includes a fixed partition and a swinging partition;

[0020] The fixed partition is vertically arranged, and its front and rear ends are fixedly connected to the front end plate and the rear end plate, respectively.

[0021] The top of the swing partition is fixedly connected to a swing shaft, and the swing shaft is rotatably connected to the bottom end of the fixed partition.

[0022] The partition mechanism also includes a swing adjustment mechanism for driving the swing shaft to rotate.

[0023] As a further improvement to the metal powder rolling feeding device: the swing adjustment mechanism includes a second housing mounted on the outer side of the front end plate or the rear end plate, a second worm gear mounted on the second housing by a rotatable connection, and a second worm wheel mounted on the second housing by a rotatable connection and meshing with the second worm gear; the second worm wheel is fixedly mounted on the end of the swing shaft.

[0024] As a further improvement to the metal powder rolling feeding device: the bottom of the front end and the bottom of the rear end of the fixed side plate and the movable side plate are provided with downward protrusions. The outer side of the protrusion has an inward concave arc surface, which is used to cooperate with the rolling mill roll on the same side. The two protrusions on the same side form a duckbill structure.

[0025] The inner side of the protrusion is provided with a groove, and a leaking spout plate is installed between the two protrusions on the same side. The protrusions on both sides of the leaking spout plate are embedded in the groove.

[0026] As a further improvement to the metal powder rolling feeder, it also includes a mounting plate and fixing bolts;

[0027] The fixed mounting plate is fixedly connected to the feed hopper, and the fixing bolt passes downward through the through hole on the fixed mounting plate. A spring is provided between the head of the fixing bolt and the fixed mounting plate.

[0028] The present invention also discloses a method for feeding metal powder during rolling, which is based on the aforementioned metal powder rolling feeding device;

[0029] Both the fixed side plate and the movable side plate have downwardly protruding protrusions at the bottom of their front and rear ends. The outer side of each protrusion has a concave arc surface, which is used to cooperate with the rolling mill roll on the same side. The two protrusions on the same side form a duckbill structure. The inner side of each protrusion has a groove, and a leaking nozzle insert plate is installed between the two protrusions on the same side. The protrusions on both sides of the leaking nozzle insert plate are embedded in the groove.

[0030] The end of the stirring shaft is also connected to a follower wheel located outside the feed hopper, which is used to make frictional contact with the surface of the rolling mill rolls;

[0031] The partition mechanism includes a fixed partition and a swing partition; the fixed partition is vertically arranged, and its front and rear ends are fixedly connected to the front end plate and the rear end plate, respectively; the top of the swing partition is fixedly connected to a swing shaft, and the swing shaft is rotatably connected to the bottom end of the fixed partition; the partition mechanism also includes a swing adjustment mechanism for driving the swing shaft to rotate.

[0032] Before rolling, adjust the two rolling mill rolls to increase the distance between them. Then, drive the movable side plate away from the fixed side plate through the gap adjustment mechanism, remove the original installed nozzle insert plate, and then select a nozzle insert plate of the appropriate size according to the new target distance between the rolling mill rolls and place it into the gap of the duckbill structure. Then, drive the movable side plate closer to the fixed side plate through the gap adjustment mechanism to clamp the nozzle insert plate. Then, adjust the rolling mill rolls to the new target distance and ensure that the rolling mill rolls are in contact with the follower wheel on the same side. After that, operate the swing adjustment mechanism according to the thickness ratio of the two sub-layers in the plate to be pressed, adjust the angle of the swing partition plate, and make the ratio of the distance between the lower edge of the swing partition plate and the inner edge of the two rolling mill rolls consistent with the required sub-layer thickness ratio.

[0033] During rolling, the rolling mill rolls rotate and drive the follower wheel to rotate synchronously through friction. The follower wheel drives the stirring shaft to rotate. Different metal powders are fed into the feed hopper from both sides of the fixed partition. After being stirred by the stirring shaft, the powder enters the gap between the two rolling mill rolls and is rolled into a plate under the action of the rolling mill rolls.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention has two sets of stirring shafts installed inside the feed hopper. During the rotation of the stirring shafts, the stirring blades continuously act on the powder in the feed hopper, which plays a role in forcibly breaking up the arches and uniformly mixing the stainless steel powder and titanium powder that have poor flowability and are prone to agglomeration. This effectively eliminates the phenomenon of local accumulation or flow stagnation caused by the difference in powder particle size, so that the powder enters the gap of the roll in a loose and uniform state, thereby ensuring the uniformity of the density of the rolled billet and avoiding the fluctuation of the billet density caused by unstable feeding.

[0036] 2. This invention, by setting up a movable side plate and a gap adjustment mechanism, along with a replaceable nozzle insert plate, allows the outlet size of the feed hopper to be adjusted synchronously with changes in the roll gap. When changing product specifications or adjusting the roll gap, simply move the movable side plate through the gap adjustment mechanism, remove the original nozzle insert plate, install a new insert plate matching the roll gap size, and then re-clamp to complete the matching adjustment of the feeding device. This avoids the powder leakage or blockage problems caused by the fixed outlet in existing technologies, which cannot adapt to changes in the roll gap. Furthermore, it eliminates the need to manufacture a separate feeding device for each roll gap specification, significantly reducing equipment modification costs.

[0037] 3. This invention incorporates a baffle mechanism located between two sets of stirring shafts inside the feed hopper. This baffle mechanism consists of a fixed baffle and a swingable baffle. During the actual rolling of composite plates or gradient materials, two different powders are fed onto both sides of the fixed baffle. The swinging shaft is rotated by a swing adjustment mechanism, changing the distance ratio between the lower edge of the swing baffle and the inner edges of the two side rollers. This allows for precise control of the powder feeding ratio on both sides, thereby controlling the thickness ratio of each sublayer of the composite billet. Compared to existing devices that lack a layering adjustment mechanism and rely solely on natural accumulation and layering within the hopper, this invention enables quantitative control of the composite layer thickness, ensuring uniform thickness and flat interfaces across the composite plate.

[0038] 4. Regarding the stirring drive method, this invention incorporates a follower wheel at the end of the stirring shaft, which maintains frictional contact with the surface of the rolling mill rolls. During rolling, the rotation of the rolls directly drives the follower wheel, which in turn drives the stirring shaft and stirring blades, eliminating the need for an additional power source and transmission system. This follower structure not only saves equipment space and reduces overall energy consumption, but also ensures that the stirring speed is always matched to the roll speed, avoiding powder disturbance or accumulation caused by excessively fast or slow stirring. It is particularly suitable for controlling the uniformity of large-size feeding during the rolling of ultra-wide plates.

[0039] 5. The movable side plate has upper and lower sliding plates at its front and rear ends, respectively. The lower sliding plate engages with grooves on the front and rear end plates, and the end of the stirring shaft near the movable side plate is mounted on the lower sliding plate via a bearing seat. When the gap adjustment mechanism drives the movable side plate to change the outlet width, the stirring shaft moves synchronously with the movable side plate, ensuring that the stirring shaft is always in a suitable position close to the movable side plate and will not deviate from the main flow area of ​​the powder due to the movement of the side plate. This linkage structure ensures that the stirring action of the stirring shaft on the powder remains stable while adjusting the outlet size, avoiding problems such as stirring dead zones or localized poor flow.

[0040] 6. This invention features downwardly protruding protrusions at the bottom of both the fixed and movable side plates on both sides of the feed hopper. The outer side of each protrusion is machined into a concave arc surface that mates with the roll surface. Two protrusions on the same side form a duckbill structure, and a nozzle insert is installed in the groove inside the protrusion. The duckbill structure ensures a tight fit between the feed hopper and the roll surface, allowing powder to directly enter the roll gap after being discharged from the outlet, effectively preventing powder leakage and the ingress of outside air. Furthermore, the nozzle insert is installed by embedding protrusions into the grooves on both sides, which not only prevents leakage but also facilitates disassembly, providing a structural basis for rapid replacement after roll gap adjustment.

[0041] 7. This invention incorporates a spring between the fixed mounting plate and the head of the fixing bolt. The downward pressure of the spring elastically presses the entire feeding device against the mill stand. On one hand, this elastic pressing structure ensures that the follower wheel and the roll surface maintain good frictional contact, preventing slippage of the follower wheel due to installation gaps or equipment vibration. On the other hand, the downward pressure of the spring elastically presses the entire feeding device against the mill stand, creating a stable pressing fit between the device and the roll. This ensures the reliability of the stirring drive while avoiding assembly stress that may result from rigid connections. Attached Figure Description

[0042] Figure 1 A schematic diagram of a feeding device for metal powder rolling.

[0043] Figure 2 An exploded view of a metal powder rolling feeder.

[0044] Figure 3 This is a schematic diagram showing the positional relationship between the metal powder rolling feeder and the two rolling mill rolls. The diagram includes a partial cross-section of the swing adjustment mechanism.

[0045] Figure 4 This is a partial sectional view of the clearance adjustment mechanism, the fixed plate, and the upper part of the movable side plate, to show the internal structure of the clearance adjustment mechanism.

[0046] Figure 5 This is a schematic diagram showing the connection relationship between the two sets of gap adjustment mechanisms and the intermediate connecting rod.

[0047] Figure 6 This is a top view of a metal powder rolling feeder, with partial cross-sectional views of the gap adjustment mechanism and the swing adjustment mechanism.

[0048] Figure 7 This is a schematic diagram of multiple sets of leak nozzle inserts of different specifications.

[0049] Figure 8 A schematic diagram of a metal powder rolling feeder installed on a rolling mill stand.

[0050] Figure 9 This is a schematic diagram showing the relative relationship between the feed hopper, powder, and two rolling rolls during rolling, illustrating the process of rolling powder into sheet metal.

[0051] The reference numerals in the figures include:

[0052] 1. Fixed mounting plate, 2. Fixed bolt, 3. Spring, 4. Gap adjustment mechanism, 5. Connecting rod, 6. Fixed plate, 7. Movable side plate, 8. Nozzle insert plate, 9. Fixed partition plate, 10. Rear end plate, 11. Fixed side plate, 12. Front end plate, 13. Follower wheel, 14. Swing adjustment mechanism, 15. Stirring shaft, 16. Swing shaft, 17. Swing partition plate, 18. Positioning protrusion, 19. Rolling mill roll, 20. Rolling mill frame, 401. First housing, 402. First locking nut, 403. First worm, 404. First worm wheel, 701. Threaded rod, 702. Upper sliding plate, 703. Lower sliding plate, 704. Bearing seat, 1401. Second housing, 1402. Second worm, 1403. Second locking nut, 1404. Second worm wheel. Detailed Implementation

[0053] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0054] like Figure 1 and Figure 2 As shown, this embodiment provides a metal powder rolling feeding device, which includes a feed hopper mounted on a rolling mill stand 20. The bottom of the feed hopper is provided with a discharge port, which is located between two rotating rolling mill rolls 19 on the rolling mill stand 20.

[0055] Specifically, the feed hopper mainly consists of a front end plate 12, a rear end plate 10, a fixed side plate 11, and a movable side plate 7. The front end plate 12 and the rear end plate 10 are fixedly mounted relative to the mill frame 20. The front end and rear end of the fixed side plate 11 are fixedly connected to the right ends of the front end plate 12 and the rear end plate 10, respectively. The movable side plate 7 is located between the front end plate 12 and the rear end plate 10, and is slidably connected to both the front end plate 12 and the rear end plate 10 in the left-right direction. The bottom edges of the front end plate 12, the rear end plate 10, the fixed side plate 11, and the movable side plate 7 together form the aforementioned discharge port.

[0056] To achieve a match between the discharge port size and the roll gap, a gap adjustment mechanism 4 is also installed on the feed hopper. This mechanism is used to adjust the position of the movable side plate 7, thereby changing the size of the discharge port. Specifically, as... Figure 2 , Figure 3 and Figure 4As shown, the feed hopper also includes a fixed plate 6 connected between the left end of the front end plate 12 and the left end of the rear end plate 10. The gap adjustment mechanism 4 includes a first housing 401 mounted on the fixed plate 6, a first worm gear 403 mounted on the first housing 401 by a rotatable connection, and a first worm wheel 404 mounted on the first housing 401 by a rotatable connection and meshing with the first worm gear 403. A threaded rod 701 is fixedly connected to the outer surface of the movable side plate 7. The threaded rod 701 passes through the fixed plate 6 and mates with a threaded hole on the first worm wheel 404.

[0057] Furthermore, to ensure the stability of the movable side panel 7 during movement, such as Figure 5 and Figure 6 As shown, the outer surface of the movable side plate 7 is provided with two sets of threaded rods 701, one in front and one in back. Correspondingly, the fixed plate 6 is provided with two sets of gap adjustment mechanisms 4 that correspond one-to-one with the threaded rods 701. The first worm gear 403 is horizontally set, and the inner ends of the first worm gear 403 of the two sets of gap adjustment mechanisms 4 are connected by a connecting rod 5, thereby realizing synchronous rotation and ensuring synchronous movement of the front and rear sides of the movable side plate 7.

[0058] like Figure 5 As shown, a first locking screw ring 402 is also installed on the first housing 401 via a threaded connection. The external thread on the first locking screw ring 402 mates with the threaded hole on the first housing 401, and its inner end is used to press the end of the first worm 403, thereby locking the positions of the first worm 403 and the first worm wheel 404. The center of the first locking screw ring 402 is provided with a through hole. After loosening the first locking screw ring 402, a hex wrench can be inserted through the through hole into the internal hexagonal hole at the end of the first worm 403 to rotate the first worm 403, thereby rotating the first worm wheel 404. The threaded engagement between the first worm wheel 404 and the threaded rod 701 drives the movable side plate 7 to move left and right, changing the size of the discharge port, and finally locking the first locking screw ring 402.

[0059] like Figure 2 , Figure 3 and Figure 6 As shown, two sets of stirring shafts 15 are also installed inside the feed hopper. The two ends of the stirring shafts 15 are rotatably connected to the front plate 12 and the rear plate 10, respectively. The stirring shafts 15 are equipped with stirring blades, which rotate with the stirring shafts 15 to stir the metal powder in the feed hopper, thereby breaking up the agglomeration of the powder and improving the uniformity of powder flow.

[0060] Furthermore, in order to maintain the mixing effect while adjusting the width of the discharge port, such as Figure 2 , Figure 3 and Figure 6As shown, the movable side plate 7 has an upper sliding plate 702 and a lower sliding plate 703 at both its front and rear ends. The upper sliding plate 702 and the lower sliding plate 703 are respectively slidably engaged with the front end plate 12 or the rear end plate 10 on the corresponding side, thereby achieving stable sliding of the movable side plate 7. The lower sliding plate 703 engages with the grooves opened on the outer side of the front end plate 12 and the rear end plate 10, and a bearing seat 704 is provided on the lower sliding plate 703. The end of the stirring shaft 15 near the movable side plate 7 passes through the waist-shaped hole opened on the front end plate 12 or the rear end plate 10 and is rotatably connected to the bearing seat 704 through a bearing, thereby achieving synchronous movement of the stirring shaft 15 and the movable side plate 7. When the gap adjustment mechanism 4 drives the movable side plate 7 to move, the stirring shaft 15 on that side moves accordingly, ensuring that it is always located in the main area of ​​powder flow.

[0061] Furthermore, such as Figure 1 and Figure 3 As shown, the end of the stirring shaft 15 is also connected to a follower wheel 13 located outside the feed hopper. The follower wheel 13 is used for frictional contact with the surface of the rolling mill roll 19. Specifically, the follower wheel 13 is installed at the end of the stirring shaft 15 by a key connection, and the outer side of the follower wheel 13 is axially limited by a washer and a locking nut or a washer and a retaining spring.

[0062] An adjustable baffle mechanism is also installed inside the feed hopper, located between the two sets of stirring shafts 15, to achieve precise stratification of the composite material. Figure 2 , Figure 3 and Figure 6 As shown, the partition mechanism includes a fixed partition 9 and a swing partition 17. The fixed partition 9 is vertically arranged, and its front and rear ends are fixedly connected to the front end plate 12 and the rear end plate 10, respectively. The top of the swing partition 17 is fixedly connected to a swing shaft 16, and the swing shaft 16 is rotatably connected to the bottom end of the fixed partition 9.

[0063] Furthermore, the partition mechanism also includes a swing adjustment mechanism 14 for driving the swing shaft 16 to rotate. For example... Figure 3As shown, the swing adjustment mechanism 14 includes a second housing 1401 mounted on the outer side of the front end plate 12 or the rear end plate 10, a second worm gear 1402 mounted on the second housing 1401 via a rotatable connection, and a second worm wheel 1404 mounted on the second housing 1401 via a rotatable connection and meshing with the second worm gear 1402. The second worm wheel 1404 is fixedly mounted on the end of the swing shaft 16. A shaft seal is provided between the swing shaft 16 and the front end plate 12 or the rear end plate 10 to prevent powder from leaking from the gap between the swing shaft 16 and the front end plate 12 or the rear end plate 10. A second locking screw ring 1403 is also mounted on the second housing 1401 via a threaded connection. The external thread on the second locking screw ring 1403 mates with the threaded hole on the second housing 1401, and its inner end is used to press against the end of the second worm gear 1402, thereby locking the position of the second worm gear 1402 and the second worm wheel 1404. The second locking ring 1403 has a through hole at its center. After loosening the second locking ring 1403, a hex wrench can be inserted through the through hole into the internal hexagonal hole at the end of the second worm gear 1402 to rotate the second worm gear 1402, thereby rotating the second worm wheel 1404 and driving the swing shaft 16 and the swing partition 17 to rotate. After rotating to the desired angle, the second locking ring 1403 is then tightened.

[0064] like Figure 2 As shown, both the fixed side plate 11 and the movable side plate 7 have downwardly extending protrusions at their front and rear bottoms. The outer side of each protrusion has a concave arc surface, which is used to mate with the mill roll 19 on the same side. The two protrusions on the same side form a duckbill structure. The inner surface of each protrusion has a groove, and a nozzle insert 8 is installed between the two protrusions on the same side. The protrusions on both sides of the nozzle insert 8 are embedded in the groove. Figure 7 As shown, the nozzle insert plate 8 has various thickness specifications, each of which corresponds to different target roll gap sizes of the rolling mill roll 19.

[0065] In addition, the device also includes a mounting plate 1 and fixing bolts 2. For example... Figure 1 and Figure 8 As shown, the fixed mounting plate 1 is fixedly connected to the feed hopper, and the fixing bolt 2 passes downward through the through hole on the fixed mounting plate 1. A spring 3 is provided between the head of the fixing bolt 2 and the fixed mounting plate 1. During installation, the fixing plate 6 is fixedly connected to the mill frame 20. The downward pressure of the spring 3 elastically presses the entire feeding device onto the mill frame 20, thereby ensuring that the follower wheel 13 is in close contact with the mill roll 19, while the concave arc surface on the outer side of the protrusion maintains elastic contact with the mill roll 19.

[0066] The following is combined Figure 3 , Figure 7 and Figure 9 The working process of this device is described in detail.

[0067] Before rolling, the two rolling mill rolls 19 are first adjusted to increase the distance between them. Then, the movable side plate 7 is driven away from the fixed side plate 11 by the gap adjustment mechanism 4, and the original nozzle insert plate 8 is pulled out from the groove of the protrusion. Next, according to the target distance between the adjusted rolling mill rolls 19, a nozzle insert plate 8 of the corresponding thickness is selected, and the protrusions on both sides of the nozzle insert plate 8 are embedded into the grooves on the inner side of the two protrusions on the same side. After that, the movable side plate 7 is driven closer to the fixed side plate 11 by the gap adjustment mechanism 4, so that the movable side plate 7 and the fixed side plate 11 clamp the nozzle insert plate 8 together. Then, the rolling mill rolls 19 are adjusted to the new target distance, and it is ensured that the rolling mill rolls 19 are in contact with the follower wheel 13 on the same side. Finally, according to the thickness ratio of the two sub-layers in the plate to be pressed, the swing adjustment mechanism 14 is operated to adjust the angle of the swing partition 17 so that the ratio of the distance between the lower edge of the swing partition 17 and the inner edge of the two rolling mill rolls 19 is consistent with the required sub-layer thickness ratio.

[0068] During rolling, the mill rolls 19 rotate, and the friction drives the follower wheel 13 to rotate synchronously. The follower wheel 13 drives the agitator shaft 15 to rotate. Different metal powders are fed into the feed hopper from both sides of the fixed partition 9. If rolling a single powder, the powder can be fed into the feed hopper from either side of the fixed partition 9, or the same powder can be fed from both sides simultaneously. If rolling a composite powder, two different metal powders are fed into the feed hopper from both sides of the fixed partition 9. After being agitated by the two sets of agitator shafts 15 in the feed hopper, the powder enters the gap between the two mill rolls 19 and is rolled into a sheet under the action of the mill rolls 19. During this process, the duckbill structure ensures that the feed hopper and the roll surface fit tightly together, effectively preventing powder leakage. At the same time, the driving method of the follower wheel 13 ensures that the agitation speed is always matched with the roll speed, guaranteeing the uniformity of feeding.

[0069] It should be noted that, as will be apparent to those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics thereof. The scope of the present invention is defined by the claims rather than the foregoing description.

Claims

1. A method of powder rolling feedstock of a metal, characterized by: The method is based on a metal powder rolling feeder, which includes a feed hopper installed on a mill stand (20), the bottom of the feed hopper is provided with a discharge port, the discharge port is located between two rotating mill rolls (19) on the mill stand (20), and the feed hopper includes a front end plate (12), a rear end plate (10), a fixed side plate (11) and a movable side plate (7). The front end plate (12) and the rear end plate (10) are fixedly set relative to the mill frame (20). The front end and the rear end of the fixed side plate (11) are fixedly connected to the right end of the front end plate (12) and the right end of the rear end plate (10) respectively. The movable side plate (7) is located between the front end plate (12) and the rear end plate (10) and is slidably connected to the front end plate (12) and the rear end plate (10) in the left and right directions respectively. The bottom edges of the front end plate (12), the rear end plate (10), the fixed side plate (11) and the movable side plate (7) form the discharge port. The feed hopper is also equipped with a gap adjustment mechanism (4) for adjusting the position of the movable side plate (7) to change the size of the discharge port. The feed hopper is also equipped with two sets of stirring shafts (15) on the left and right sides. The two ends of the stirring shafts (15) are rotatably connected to the front end plate (12) and the rear end plate (10) respectively. An adjustable baffle mechanism is also installed inside the feed hopper, and the baffle mechanism is located between the two sets of stirring shafts (15); The fixed side plate (11) and the movable side plate (7) are provided with downward protrusions at the bottom of the front end and the bottom of the rear end. The outer side of the protrusion has an inward concave arc surface, which is used to cooperate with the mill roll (19) on the same side. The two protrusions on the same side form a duckbill structure. The inner side of the protrusion is provided with a groove. A leaking nozzle insert plate (8) is also installed between the two protrusions on the same side. The protrusions on both sides of the leaking nozzle insert plate (8) are embedded in the groove. The end of the stirring shaft (15) is also connected to a follower wheel (13) located outside the feed hopper. The follower wheel (13) is used to make frictional contact with the surface of the rolling mill roll (19). The partition mechanism includes a fixed partition (9) and a swing partition (17); the fixed partition (9) is vertically arranged, and its front and rear ends are fixedly connected to the front end plate (12) and the rear end plate (10) respectively; the top of the swing partition (17) is fixedly connected to a swing shaft (16), and the swing shaft (16) is rotatably connected to the bottom end of the fixed partition (9); the partition mechanism also includes a swing adjustment mechanism (14) for driving the swing shaft (16) to rotate. Before rolling, adjust the two rolling mill rolls (19) to increase the distance between them. Then, drive the movable side plate (7) away from the fixed side plate (11) through the gap adjustment mechanism (4), remove the original installed nozzle insert plate (8), and then select a nozzle insert plate (8) of the same size according to the target distance between the new rolling mill rolls (19) and put it into the gap of the duckbill structure. Then, drive the movable side plate (7) close to the fixed side plate (11) through the gap adjustment mechanism (4) to clamp the nozzle insert plate (8). Then, adjust the rolling mill rolls (19) to the new target distance and ensure that the rolling mill rolls (19) are in contact with the follower wheel (13) on the same side. After that, operate the swing adjustment mechanism (14) according to the thickness ratio of the two sub-layers in the plate to be pressed, adjust the angle of the swing partition plate (17) so that the ratio of the distance between the lower edge of the swing partition plate (17) and the inner edge of the two rolling mill rolls (19) is consistent with the required sub-layer thickness ratio. During rolling, the rolling mill rolls (19) rotate and drive the follower wheel (13) to rotate synchronously through friction. The follower wheel (13) drives the stirring shaft (15) to rotate. Different metal powders are fed into the feed hopper from both sides of the fixed partition (9). After being stirred by the stirring shaft (15), the powder enters the gap between the two rolling mill rolls (19) and is rolled into a plate under the action of the rolling mill rolls (19).

2. The metal powder roll-fed method of claim 1, wherein: The feed hopper also includes a fixing plate (6) connected between the left end of the front end plate (12) and the left end of the rear end plate (10); The gap adjustment mechanism (4) includes a first housing (401) mounted on a fixed plate (6), a first worm (403) mounted on the first housing (401) by a rotatable connection, and a first worm wheel (404) mounted on the first housing (401) by a rotatable connection and meshing with the first worm (403). A threaded rod (701) is fixedly connected to the outer side surface of the movable side plate (7). The threaded rod (701) passes through the fixed plate (6) and engages with the threaded hole on the first worm gear (404).

3. The metal powder roll-fed method of claim 2, wherein: The movable side plate (7) has two sets of threaded rods (701) on its outer side surface, and the fixed plate (6) has two sets of gap adjustment mechanisms (4) corresponding to the threaded rods (701). The first worm (403) is horizontally set, and the inner ends of the first worm (403) of the two sets of gap adjustment mechanisms (4) are connected by a connecting rod (5) to achieve synchronous rotation.

4. The metal powder roll-fed method of claim 1, wherein: The front and rear ends of the movable side plate (7) are provided with an upper sliding plate (702) and a lower sliding plate (703), and the upper sliding plate (702) and the lower sliding plate (703) respectively slide in cooperation with the front end plate (12) or the rear end plate (10) on the corresponding side. The lower slide plate (703) cooperates with the slide grooves opened on the outside of the front plate (12) and the rear plate (10). The lower slide plate (703) is provided with a bearing seat (704). The end of the stirring shaft (15) near the movable side plate (7) passes through the waist-shaped hole opened on the front plate (12) or the rear plate (10) and is rotatably connected to the bearing seat (704) through the bearing, so as to realize the synchronous movement of the stirring shaft (15) and the movable side plate (7).

5. The metal powder roll-fed method of claim 1, wherein: The swing adjustment mechanism (14) includes a second housing (1401) mounted on the outer side of the front end plate (12) or the rear end plate (10), a second worm (1402) mounted on the second housing (1401) by a rotatable connection, and a second worm wheel (1404) mounted on the second housing (1401) by a rotatable connection and meshing with the second worm (1402); the second worm wheel (1404) is fixedly mounted on the end of the swing shaft (16).

6. The metal powder roll-fed method of claim 1, wherein: It also includes a mounting plate (1) and fixing bolts (2); The fixed mounting plate (1) is fixedly connected to the feed hopper, and the fixing bolt (2) passes downward through the through hole on the fixed mounting plate (1). A spring (3) is provided between the head of the fixing bolt (2) and the fixed mounting plate (1).

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