Plate-roller composite rolling forming method and device for variable cross-section characteristic plate parts

Abstract

The invention relates to the field of rolling forming of metal plate parts, in particular to a plate-roller composite rolling forming method and device for plate parts with variable cross-section characteristics. The forming equipment comprises an upper roller, a lower die, a gear, a rack, a guide rail, a sliding block, a supporting seat, a first base, a second base, a supporting frame, a cylindrical roller bearing, a bearing cover, a mandrel, a fastening nut, a gasket, a hydraulic push rod and a hydraulic driving system. The forming method comprises the following steps: blanking, designing an upper roller and a lower die, adjusting the relative position of the upper roller and the lower die, heating a plate to a set deformation temperature, deforming the plate under the combined action of a convex die of the upper roller and a groove of the lower die, and rolling into a target plate part. The device is applied to forming of variable cross-section characteristic plate parts, and has the characteristics of high production efficiency, high finished product precision, high material utilization rate, simple assembly structure, convenience in realization of automation and the like.

Description

Technical Field

[0001] The present invention relates to the field of rolling forming of metal plate parts, and specifically to a plate-roll composite rolling forming method and equipment for plate parts with variable cross-section features. Background Art

[0002] Plate parts are one of the most commonly used parts in industry. For some plate parts with variable cross-section features, due to the changes in the thickness or width direction, it is basically only possible to process them using volume forming processes with low production efficiency and low material utilization rate, such as forging, stamping forging, and rolling.

[0003] Cross wedge rolling is a forming process for rotary parts with the characteristics of local forming. Compared with forging, extrusion, and machining, it has the advantages of high production efficiency and material utilization rate, stable product forming quality, and good tissue performance. As an advanced metal plastic forming process, cross wedge rolling has attracted much attention from domestic and foreign manufacturers, experts, and scholars in recent years. With the development of the metallurgical industry and the equipment manufacturing industry, new types of equipment emerge in an endless stream, and the production efficiency increases continuously with the degree of automation. However, there are few reports on the manufacturing of plate parts formed by cross wedge rolling, and the thinking of the public is often limited to the fact that cross wedge rolling can only be used for the efficient preparation of rotary parts. Summary of the Invention

[0004] In view of the above and existing problems, the technical problem to be solved by the present invention is to provide a plate-roll composite rolling forming method and equipment for plate parts with variable cross-section features. Based on the deformation characteristics and principles of the cross wedge rolling process, by designing the shapes and sizes of the upper roll punch and the lower die groove, and controlling the relative movement of the upper roll and the lower die, plate parts with different shapes and sizes can be formed efficiently and precisely.

[0005] The technical solution of the present invention:

[0006] A plate-roll composite rolling forming method for plate parts with variable cross-section features, the forming method comprising the following steps:

[0007] S1. According to the principle of volume conservation, obtain the blanking size of the sheet material by calculating the volume of the target part;

[0008] S2. Select or design the upper roll and the lower die according to the shape and size of the target part;

[0009] S3. Adjust the relative position of the upper roll and the lower die;

[0010] S4. Heat the sheet material to the set deformation temperature;

[0011] S5. Place the sheet material in the lower die groove and fit it with the end face;

[0012] S6. Rolling: The lower die moves horizontally, and through mechanical cooperation, drives the upper roll to perform a circumferential rotational movement at a constant speed. The sheet material deforms under the combined action of the convex die of the upper roll and the groove of the lower die to obtain the target sheet-like part.

[0013] In the sheet-roll compound rolling forming method of the variable cross-section feature sheet-like part, the shape and size of the convex die of the upper roll and the groove of the lower die are matched to form a closed die cavity for the target sheet-like part with variable cross-section features.

[0014] In the sheet-roll compound rolling forming method of the variable cross-section feature sheet-like part, a roll-return groove is left at the corner of the designed groove of the lower die.

[0015] In the sheet-roll compound rolling forming method of the variable cross-section feature sheet-like part, the reduction of the sheet material is adjusted by adjusting the height of the convex die of the upper roll, and single-pass or multi-pass rolling with more than two passes is performed using a single or more than two upper rolls.

[0016] In the sheet-roll compound rolling forming method of the variable cross-section feature sheet-like part, according to the shape and size of the target part, the lower die with grooves and the convex die of the upper roll with different shapes and sizes are manufactured.

[0017] In the sheet-roll compound rolling forming method of the variable cross-section feature sheet-like part, gears are installed on both sides of the upper roll, racks are installed on both sides of the lower die, and the gears on both sides of the upper roll are matched with the racks on both sides of the lower die to ensure that the rotational speed of the upper roll is equal to the moving speed of the lower die.

[0018] In the sheet-roll compound rolling forming method of the variable cross-section feature sheet-like part, the thickness of the sheet material is less than the depth of the groove of the lower die.

[0019] A sheet-roll compound rolling forming equipment for variable cross-section feature sheet-like parts, the forming equipment includes an upper roll, a lower die, gears, racks, guide rails, sliders, support seats, a first base, a second base, a support frame, cylindrical roller bearings, bearing covers, mandrels, fastening nuts, washers, hydraulic push rods and a hydraulic drive system, and the specific structure is described in detail as follows:

[0020] Two gears are respectively arranged on both sides of the upper roller, and two racks are respectively arranged on both sides of the lower die. The gears and racks corresponding to each other up and down form a gear-rack transmission mechanism; cylindrical roller bearings are arranged on both sides of the central hole of the upper roller. The mandrel passes through the central hole of the upper roller and is drivingly connected with the upper roller through the cylindrical roller bearings. Two bearing covers respectively cover the outer sides of the cylindrical roller bearings and are connected with the corresponding gears. Both ends of the mandrel respectively pass through the through holes of a support seat and extend to the outside of the support seat. Both ends of the mandrel are provided with external threads and are fixedly fitted with both ends of the mandrel through matching washers and fastening nuts. The two support seats are symmetrically arranged on the first base, and the corresponding upper parts between the two support seats are connected by a support frame; the lower die with racks installed on both sides is arranged in the groove of the slider. The lower die is matched with the slider groove, and the bottom of the slider is in sliding fit with the guide rail to form a guide rail-slider transmission mechanism. The guide rail is arranged on the second base. The hydraulic push rod is connected with one end of the slider, and the hydraulic drive system is used to control the feeding movement of the lower die. The hydraulic drive system provides power for the slider through the hydraulic push rod.

[0021] For the plate-roller composite rolling forming equipment for variable cross-section feature plate-like parts, when more than two upper rollers are used for rolling, the more than two upper rollers are arranged relatively parallel and are respectively installed between two support seats through mandrels; an auxiliary positioning slider is arranged at the other end of the slider. The bottom of the auxiliary positioning slider is in sliding fit with the guide rail to form a guide rail-slider transmission mechanism. A rack is installed on the auxiliary positioning slider, and the rack is matched with the gear of the corresponding upper roller to form a gear-rack transmission mechanism.

[0022] For the plate-roller composite rolling forming equipment for variable cross-section feature plate-like parts, during operation, under the action of the hydraulic drive system, the hydraulic push rod drives the lower die to move horizontally through the slider. The upper roller has a circumferential rotational movement with the same speed as the lower die through mechanical meshing, driving the sheet material to move and deform; alternatively, the lower die remains stationary and the upper roller makes a rotational movement.

[0023] The design concept of the present invention is: to break through the cross wedge rolling forming principle, match the rotational movement of the wedge-shaped die with the horizontal movement of the sheet material, connect the partially contacted partial deformation areas continuously, and achieve the high-efficiency plastic processing of variable cross-section feature plate-like parts.

[0024] At present, the forming method of plate parts with variable cross-section features has low production efficiency and the material utilization rate needs to be improved. Compared with traditional forming methods for plate parts with variable cross-section features, such as forging, extrusion, and twin-roll rolling, based on the principle of cross wedge rolling process, the present invention proposes a plate-roll composite rolling forming method and equipment for plate parts with variable cross-section features. By designing different upper and lower dies and adjusting process parameters, different types of plate parts with variable cross-section features can be produced. Its plate-roll structure is simple, facilitating die manufacturing, the gear-rack drive has high positioning accuracy, and the designed roll withdrawal groove avoids interference between the upper and lower dies. The overall structure is reasonable and reliable for general assembly, and it can more quickly, efficiently, and at low cost form plate parts with high-precision variable cross-section features.

[0025] The advantages and beneficial effects of the present invention are as follows:

[0026] 1. At present, the traditional cross wedge rolling forming process can only form shaft parts. Based on the deformation characteristics and principle of the cross wedge rolling process, the present invention proposes a plate-roll composite rolling forming method for plate parts with variable cross-section features.

[0027] 2. The method of the present invention is used to form plate parts with variable cross-section features, and has the characteristics of high forming accuracy, high production efficiency, high material utilization rate, simple assembly structure, and easy realization of automation.

[0028] 3. The material of the sheet metal in the present invention is ferrous metal, non-ferrous metal, and metal composite material, and the deformation temperature of the sheet metal can be from room temperature to 1200 °C. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0030] Figure 1 It is a drawing of a plate part with variable cross-section features in an embodiment.

[0031] Figure 2 It is a schematic diagram of the principle of the plate-roll composite rolling forming method for plate parts with variable cross-section features in an embodiment.

[0032] Figure 3 It is a schematic diagram of the structure of the plate-roll composite rolling forming equipment (single roll) for plate parts with variable cross-section features in an embodiment.

[0033] Figure 4 It is a left view of the plate-roll composite rolling forming equipment (single roll) for plate parts with variable cross-section features in an embodiment.

[0034] Figure 5 Schematic diagram of the plate-roll composite rolling forming equipment (double roll) for variable cross-section feature plate parts in the embodiment.

[0035] Reference numerals in the figure: 1. First upper roll; 2. Gear; 3. Sheet metal; 4. First rack; 5. Lower die; 6. Slide block; 7. Support frame; 8. Support seat; 9. First base; 10. Mandrel; 11. Lock nut; 12. Washer; 13. Second base; 14. Guide rail; 15. Hydraulic push rod; 16. Cylindrical roller bearing; 17. Bearing cover; 18. Auxiliary positioning slide block; 19. Second upper roll; 20. Second rack; 21. Upper roll punch; 22. Lower die groove. Detailed implementation manners

[0036] Next, the technical solutions of the embodiments in this application will be clearly and completely described in conjunction with the accompanying drawings of the embodiments in the application specification. Obviously, the described embodiments are only a part of the embodiments in this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0037] Secondly, the so-called "one embodiment" or "embodiment" refers to specific features, structures or characteristics that can be included in at least one implementation manner of the present invention. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0038] Embodiment 1

[0039] As Figure 3 、 Figure 4 shown, this embodiment is a plate-roll composite rolling forming method (single roll) for variable cross-section feature plate parts, including:

[0040] S1. According to the principle of volume conservation, obtain the blanking size of the sheet metal 3 by calculating the volume of the target part;

[0041] S2. Select or design the first upper roll 1 and the lower die 5 according to the shape and size of the target part. A roll-retracting groove is provided at the corner of the lower die groove 22 to prevent the first upper roll 1 from interfering with the lower die 5 and affecting the normal rolling of the first upper roll 1;

[0042] S3. Adjust the relative positions of the first upper roll 1 and the lower die 5;

[0043] S4. Heat the sheet metal 3 to the set deformation temperature. In this embodiment, the alloy grade of the sheet metal 3 is TC4 titanium alloy, and the heating temperature is 950 °C;

[0044] S5. Place the sheet metal 3 in the lower die groove 22 and make it fit with the end face of the lower die groove 22.

[0045] S6. Rolling: The lower die 5 moves horizontally, and drives the first upper roll 1 to make a circumferential rotation motion at a constant speed through mechanical cooperation. The sheet metal 3 is processed and formed under the combined action of the upper roll punch 21 and the lower die groove 22 to obtain the target variable cross-section plate-like part.

[0046] In a specific embodiment, as Figure 1 , Figure 2 shown, the sheet metal 3 is placed in the lower die groove 22 of the lower die 5. The shape and size of the side and bottom surfaces of the variable cross-section feature plate-like part match the corresponding shape and size of the lower die groove 22. The upper roll punch 21 is provided on the first upper roll 1. The shape and size of the upper surface of the variable cross-section feature plate-like part match the corresponding shape and size of the upper roll punch 21. The upper roll punch 21 and the lower die groove 22 are matched in shape and size to form a closed die cavity for the target plate-like part with variable cross-section features. The lower die 5 can actively move horizontally at a linear velocity V, while the first upper roll 1 has a rotational motion with an angular velocity ω following. The upper roll punch 21 and the lower die groove 22 control the shape and size of the rolled piece.

[0047] As Figure 2 shown, the equipment of the present invention can be installed with a single or more than two upper rolls. In this embodiment, it is a single-roll single-pass rolling. The first upper roll 1 only makes a rotational motion after being fixed, and the lower die 5 moves horizontally; it can also be that the lower die 5 is fixed and the first upper roll 1 makes a rotational motion.

[0048] As Figure 3 , Figure 4 shown, this embodiment proposes a sheet-roll composite rolling forming equipment (single roll) for variable cross-section plate-like parts, including a first upper roll 1, a lower die 5, a gear 2, a first rack 4, a guide rail 14, a slider 6, a support seat 8, a first base 9, a second base 13, a support frame 7, a cylindrical roller bearing 16, a bearing cover 17, a mandrel 10, a fastening nut 11, a washer 12, a hydraulic push rod 15 and a hydraulic drive system. The specific structure is as follows:

[0049] Two gears 2 are respectively arranged on both sides of the first upper roll 1, and two first racks 4 are respectively arranged on both sides of the lower die 5. The gears 2 and the first racks 4 corresponding to each other up and down are matched to form a gear-rack transmission mechanism, ensuring that the rotational speed of the first upper roll 1 is equal to the moving speed of the lower die 5; cylindrical roller bearings 16 are arranged on both sides of the central hole of the first upper roll 1. The mandrel 10 passes through the central hole of the first upper roll 1 and is drivingly connected with the first upper roll 1 through the cylindrical roller bearings 16. Two bearing caps 17 respectively cover the outside of the cylindrical roller bearings 16 and are connected with the corresponding gears 2. Both ends of the mandrel 10 respectively pass through the through holes of a support seat 8 and extend to the outside of the support seat 8. Both ends of the mandrel 10 are provided with external threads and are fixed in cooperation with both ends of the mandrel 10 through matching washers 12 and fastening nuts 11. The two support seats 8 are symmetrically arranged on the first base 9, and the corresponding upper parts between the two support seats 8 are connected through a support frame 7; the lower die 5 is arranged in the groove of the slider 6. The bottom of the slider 6 is in sliding fit with the guide rail 14 to form a guide rail-slider transmission mechanism. The guide rail 14 is arranged on the second base 13. The hydraulic push rod 15 is connected with one end of the slider 6. The hydraulic drive system is used to control the feeding movement of the lower die 5. The hydraulic drive system provides power for the horizontal movement of the slider 6 through the hydraulic push rod 15. During operation, under the action of the hydraulic drive system, the hydraulic push rod 15 drives the lower die 5 to move horizontally through the slider 6. The first upper roll 1 has a circumferential rotational movement equal to the speed of the lower die 5 through mechanical meshing, driving the sheet material 3 to move and deform, and obtaining a variable cross-section feature plate-like part with the required external dimensions.

[0050] Embodiment 2

[0051] As Figure 5 shown, this embodiment proposes a sheet-roll compound rolling forming method (double-roll) for variable cross-section feature plate-like parts, including:

[0052] S1. According to the principle of volume conservation, the blanking size of the sheet material 3 is obtained by calculating the volume of the target part;

[0053] S2. Select or design the first upper roll 1, the second upper roll 19 and the lower die 5 according to the shape and size of the target part. A roll-retracting groove is opened at the corner of the lower die groove 22 to prevent interference between the first upper roll 1, the second upper roll 19 and the lower die 5, affecting the normal rolling of the first upper roll 1 and the second upper roll 19;

[0054] S3. Adjust the relative positions between the first upper roll 1 and the second upper roll 19 and the lower die 5 to ensure that when the lower die 5 moves to the second upper roll 19, the upper roll punch 21 and the lower die groove 22 can be fully matched;

[0055] S4. Heat the sheet material 3 to the set deformation temperature. In this embodiment, the alloy grade of the sheet material 3 is TC4 titanium alloy, and the heating temperature is 950 °C;

[0056] S5. Place the sheet metal 3 in the lower die groove 22 and make it fit with the end face of the lower die groove 22;

[0057] S6. Rolling: The lower die 5 moves horizontally, and drives the first upper roll 1 and the second upper roll 19 to perform circumferential rotational movements at the same speed through mechanical cooperation. The sheet metal 3 is successively processed and formed under the combined action of the upper roll punch 21 of the first upper roll 1 and the lower die groove 22, and the upper roll punch 21 of the second upper roll 19 and the lower die groove 22 to obtain the target variable cross-section panel-like part.

[0058] In a specific embodiment, as Figure 5 shown, the lower die 5 can actively move horizontally, while the first upper roll 1 and the second upper roll 19 have follow-up rotational movements. Adjust the height of the upper roll punch 21 of the first upper roll 1 and the lower die 5 to control the downward pressure for preforming, and then the upper roll punch 21 of the second upper roll 19 and the lower die 5 act together to obtain the rolled piece with the target shape and size.

[0059] As Figure 5 shown, this embodiment proposes a sheet-roll composite rolling forming equipment (double rolls) for variable cross-section panel-like parts, including two upper rolls (the first upper roll 1 and the second upper roll 19), a lower die 5, a gear 2, a first rack 4, a second rack 20, a guide rail 14, a slider 6, a support seat 8, a first base 9, a second base 13, a support frame 7, a cylindrical roller bearing 16, a bearing cover 17, a mandrel 10, a fastening nut 11, a washer 12, an auxiliary positioning slider 18, a hydraulic push rod 15 and a hydraulic drive system. The specific structure is as follows:

[0060] The two support seats 8 are symmetrically arranged on the first base 9, the corresponding upper parts between the two support seats 8 are connected by a support frame 7, the first upper roll 1 and the second upper roll 19 are relatively parallelly arranged and are respectively installed between the two support seats 8 through a mandrel 10.

[0061] Two gears 2 are respectively arranged on both sides of the first upper roller 1, and two first racks 4 are respectively arranged on both sides of the lower die 5. The upper and lower corresponding gears 2 and the first racks 4 are matched to form a rack and pinion transmission mechanism to ensure that the rotational speed of the first upper roller 1 is equal to the moving speed of the lower die 5. Cylindrical roller bearings 16 are arranged on both sides of the central hole of the first upper roller 1. A mandrel 10 is inserted through the central hole of the first upper roller 1 and is drivingly connected with the first upper roller 1 through the cylindrical roller bearings 16. Two bearing caps 17 respectively cover the outside of the cylindrical roller bearings 16 and are connected with the corresponding gears 2. Both ends of the mandrel 10 respectively pass through the through holes of a support seat 8 and extend to the outside of the support seat 8. Both ends of the mandrel 10 are provided with external threads and are fixed in cooperation with both ends of the mandrel 10 through matching washers 12 and fastening nuts 11. The lower die 5 is arranged in the groove of the slider 6. The bottom of the slider 6 is in sliding fit with the guide rail 14 to form a guide rail slider transmission mechanism. The guide rail 14 is arranged on the second base 13. A hydraulic push rod 15 is connected with one end of the slider 6. The hydraulic drive system is used to control the feeding movement of the lower die 5, and the hydraulic drive system provides power for the horizontal movement of the slider 6 through the hydraulic push rod 15.

[0062] Similarly, assemble the second upper roller 19. Two gears 2 are respectively arranged on both sides of the second upper roller 19. An auxiliary positioning slider 18 is arranged at the other end of the slider 6. The bottom of the auxiliary positioning slider 18 is in sliding fit with the guide rail 14 to form a guide rail slider transmission mechanism. A second rack 20 is installed on the auxiliary positioning slider 18. The upper and lower corresponding gears 2 and the second rack 20 are matched to form a rack and pinion transmission mechanism to ensure that the rotational speed of the second upper roller 19 is equal to the moving speed of the lower die 5. Cylindrical roller bearings 16 are arranged on both sides of the central hole of the second upper roller 19. A mandrel 10 is inserted through the central hole of the second upper roller 19 and is drivingly connected with the second upper roller 19 through the cylindrical roller bearings 16. Two bearing caps 17 respectively cover the outside of the cylindrical roller bearings 16 and are connected with the corresponding gears 2. Both ends of the mandrel 10 respectively pass through the through holes of a support seat 8 and extend to the outside of the support seat 8. Both ends of the mandrel 10 are provided with external threads and are fixed in cooperation with both ends of the mandrel 10 through matching washers 12 and fastening nuts 11. The hydraulic drive system sequentially provides power for the horizontal movement of the auxiliary positioning slider 18 through the hydraulic push rod 15 and the slider 6.

[0063] During operation, under the action of the hydraulic drive system, the hydraulic push rod 15 drives the lower die 5 to move horizontally through the slider 6. The first upper roller 1 and the second upper roller 19 have circumferential rotational movements with the same speed as the lower die 5 through mechanical meshing, driving the sheet material 3 to move and deform, and obtaining a variable cross-section characteristic plate-like part with the required external dimensions.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A plate-roll compound rolling forming method for variable cross-section feature plate-like parts, characterized in that, the forming method comprises the following steps: S1. According to the principle of volume conservation, obtain the blanking size of the sheet metal by calculating the volume of the target part; S2. Select or design the upper roll and the lower die according to the shape and size of the target part; S3. Adjust the relative positions of the upper roll and the lower die; S4. Heat the sheet metal to the set deformation temperature; S5. Place the sheet metal in the groove of the lower die and fit it with the end face; S6. Rolling: The lower die makes a horizontal movement, and drives the upper roll to make an equal-speed circumferential rotational movement through mechanical cooperation. The sheet metal deforms under the combined action of the convex die of the upper roll and the groove of the lower die to obtain the target plate-like part.

2. The plate-roll compound rolling forming method for variable cross-section feature plate-like parts according to claim 1, characterized in that, the shape and size of the convex die of the upper roll and the groove of the lower die are matched to form a closed cavity of the target plate-like part with variable cross-section features.

3. The plate-roll compound rolling forming method for variable cross-section feature plate-like parts according to claim 1, characterized in that, a roll-return groove is provided at the corner of the designed groove of the lower die.

4. The plate-roll compound rolling forming method for variable cross-section feature plate-like parts according to claim 1, characterized in that, the reduction of the sheet metal is adjusted by adjusting the height of the convex die of the upper roll, and single-pass or multi-pass rolling is carried out using a single or more than two upper rolls.

5. The plate-roll compound rolling forming method for variable cross-section feature plate-like parts according to claim 1, characterized in that, grooved lower dies and convex dies of the upper roll with different shapes and sizes are manufactured according to the shape and size of the target part.

6. The plate-roll compound rolling forming method for variable cross-section feature plate-like parts according to claim 1, characterized in that, gears are installed on both sides of the upper roll, racks are installed on both sides of the lower die, and the gears on both sides of the upper roll are matched with the racks on both sides of the lower die to ensure that the rotational speed of the upper roll is equal to the movement speed of the lower die.

7. The plate-roll compound rolling forming method for variable cross-section feature plate-like parts according to claim 1, characterized in that, the thickness of the sheet metal is less than the depth of the groove of the lower die.

8. A plate-roll compound rolling forming equipment for variable cross-section feature plate-like parts using the forming method according to any one of claims 1 to 7, characterized in that, the forming equipment comprises an upper roll, a lower die, gears, racks, guide rails, sliders, support seats, a first base, a second base, a support frame, cylindrical roller bearings, bearing covers, mandrels, fastening nuts, washers, hydraulic push rods and a hydraulic drive system, and the specific structure is described in detail as follows: Two gears are respectively arranged on both sides of the upper roller, and two racks are respectively arranged on both sides of the lower mold. The corresponding gears and racks cooperate with each other to form a gear-rack transmission mechanism; cylindrical roller bearings are arranged on both sides of the center hole of the upper roller, the mandrel is penetrated through the center hole of the upper roller and is connected to the upper roller through the cylindrical roller bearing, and the two bearing covers are respectively buckled on the outer side of the cylindrical roller bearing and connected with the corresponding gears, and the two ends of the mandrel respectively pass through the through hole of a support seat to extend to the outer side of the support seat, and the two ends of the mandrel are provided with external threads, which are fixed with the two ends of the mandrel through matching washers and fastening nuts, and the two support seats are symmetrically arranged on the first base, and the corresponding upper parts between the two support seats are connected through a support frame; the lower mold with racks installed on both sides is arranged in the groove of the slider, the lower mold cooperates with the groove of the slider, the bottom of the slider is slidably matched with the guide rail to form a guide rail slider transmission mechanism, and the guide rail is arranged on the second base, and the hydraulic push rod is connected to one end of the slider, and the hydraulic drive system is used to control the feed movement of the lower mold, and the hydraulic drive system provides power to the slider through the hydraulic push rod.

9. The plate-roller composite rolling forming equipment for the variable cross-section characteristic plate-like parts according to claim 8, It is characterized in that When more than two upper rollers are used for rolling, the two or more upper rollers are arranged relatively parallel and are respectively installed between two support seats through the core shaft; an auxiliary positioning slider is arranged at the other end of the slider, and the bottom of the auxiliary positioning slider is slidably matched with the guide rail to form a guide rail slider transmission mechanism, and a rack is installed on the auxiliary positioning slider, and the rack cooperates with the gear of the corresponding upper roller to form a gear rack transmission mechanism.

10. The plate-roller composite rolling forming equipment for the variable cross-section characteristic plate-like parts according to claim 8, It is characterized in that During operation, under the action of the hydraulic drive system, the hydraulic push rod drives the lower mold to move horizontally through the slider, and the upper roller has a circumferential rotational motion at the same speed as the lower mold through mechanical engagement, driving the sheet to move and deform; or, the lower mold is fixed and the upper roller rotates.

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