CN107626781B

CN107626781B - Adjustable four-roller plate bending machine

Info

Publication number: CN107626781B
Application number: CN201711075102.XA
Authority: CN
Inventors: 王赞
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-06
Filing date: 2017-11-06
Publication date: 2024-01-05
Anticipated expiration: 2037-11-06
Also published as: CN107626781A

Abstract

The existing multi-roller plate bending machine has the problem that in the plate bending process, the situation that the middle of a rolled cylinder body is bigger and the two ends of the rolled cylinder body are smaller is often encountered, and the phenomenon is generally called barrel-shaped deformation. The generation of deformation causes great inconvenience to welding or internal assembly, and if the deformation is too large, the requirement of the subsequent process can be met by shaping the workpiece. Barrel-shaped deformation is mainly caused by thicker upper roller, better rigidity and thinner lower roller of the plate bending machine, and the rigidity is not higher than that of the upper roller. The invention provides that the upper roller, the left roller and the right roller adopt round rollers, and the lower roller adopts elliptic rollers. One end of the lower roller is connected with the indexing device through a coupler, and the lower roller can be rotated to contact the bus with the plate according to the hardness of the coiled plate material. When the hardness of the plate is higher, the reaction force generated on the lower roller is larger, and the lower roller can be rotated to enable the long-axis bus of the elliptical section to be in contact with the plate, so that the deflection of the lower roller is reduced. The indexing turntable is divided into six stations, and when the hardness of the coiled plate material is low, an elliptical short-axis bus can be adopted to contact with the plate, so that the process range of the four-roller plate bending machine is enlarged.

Description

Adjustable four-roller plate bending machine

Technical Field

The invention designs a plate bending machine, in particular to a four-roller plate bending machine capable of adjusting lower rollers according to different plates.

Background

In our daily life, various cylindrical, conical and arc plates are visible everywhere, and most of steel materials in steel factories are plates, so that mechanical bending, curling and other plastic deformation of related plates are needed, and a plate bending machine used in mechanical processing can meet related requirements and reach related curling radius.

With the progress and maturity of numerical control technology, computer technology and automation technology, various mechanical processing devices are developing toward high-efficiency, high-precision, automatic and intelligent flexible processing units, and the general development trend of veneer reeling machines is also developing toward highly intelligent flexible processing units. With the development of shipbuilding and mechanical processing industries to large, ultra-large and highly intensive directions, the demands for processing machines for thick plates, extra-thick plates, composite plates and special plates are increasing. The novel processing method needs a plate bending machine to take a numerical control technology as a core, and develops to a rapid, complete set of automatic and intelligent flexible processing unit so as to adapt to different processing demands of people. The plate bending machine mainly comprises a power device (mainly a motor), a transmission device (various shafting, a speed reducer, a worm gear, a guide rail and the like) frame, a base and a related control system. Various plate bending machines have appeared according to the classification criteria. The existing multi-roller plate bending machine has the problem that in the plate bending process, the situation that the middle of a rolled cylinder body is bigger and the two ends of the rolled cylinder body are smaller is often encountered, and the phenomenon is generally called barrel-shaped deformation. The generation of deformation causes great inconvenience to welding or internal assembly, and if the deformation is too large, the requirement of the subsequent process can be met by shaping the workpiece. But shaping of such deformations is very difficult. Generally, the upper roller of the plate bending machine is thicker, the rigidity is better, the lower roller is slightly thinner, and the rigidity is not as high as that of the upper roller. If the lower pressure of the upper roller is too large during rolling, and the rigidity of the measuring roller is insufficient, the roller is deformed and flexes in the process of rolling the cylinder. The barrel-shaped deformation is mainly caused by deformation due to insufficient rigidity of the roll shaft, so that each point of the roll shaft on the same layer of the plate in the length direction is stressed unevenly. The gap between the upper roll shaft and the lower roll shaft is always kept uniform, and it is very important to ensure that the pressing force and the bending force of the plate are the same. To achieve this, corresponding measures should be taken to prevent the deformation of the roll shafts or to compensate and eliminate the deformation of the roll shafts. For specific cases. The following measures can be taken respectively: first, the roll shafts of the selected plate bending machine should have sufficient rigidity so that the roll shafts do not deform even when the plate material of the maximum specification is rolled. However, the rigidity of the roll shaft is related to its section modulus. It is impossible to make the roll shafts particularly thick, in which case it should be recommended that the equipment manufacturer design each roll shaft to be slightly arc-shaped (only suitable for a certain thickness range of the plate) according to different parameters such as the length of the plate bending machine, the performance of the plate bending material, the plate thickness, etc., that is, to correct the arc shape of the roll shaft, in order to make the part of the roll shaft clamping the plate become substantially straight after the upper and lower rolls are subjected to deflection deformation during the plate bending process. The gap between the upper roller and the lower roller for clamping the plate is ensured to be consistent. The arc-shaped dimension should be calculated carefully by experienced professional technicians according to parameters such as materials, applicable plate thickness ranges and the like. Secondly, auxiliary supporting rollers are arranged at the middle part of the lower roller of the selected plate bending machine to strengthen the rigidity of the lower roller, and the number of the auxiliary supporting rollers is set according to the length of the equipment; or the arc correction of the roll shaft and the auxiliary supporting of the soil wheel are both realized.

Disclosure of Invention

The invention aims to provide an adjustable four-roller plate bending machine which is simple in structure, and can adjust the working position of a lower roller according to different processing requirements and plate thicknesses so as to achieve rigidity of the lower roller and reduce barrel-shaped deformation.

The invention relates to an adjustable four-roller plate bending machine, which comprises an upper roller, a lower roller, a left roller and a right roller, wherein the four rollers are connected with an upper roller (a driving roller) through a speed reducer and a coupler by a main motor to provide torque for plate bending movement; the lower roller vertically moves up and down by acting on the piston through hydraulic oil in a hydraulic cylinder in the hydraulic transmission system, and is matched with the upper roller to clamp the plate; simultaneously, two side rollers which do tilting motion along the frame guide rail are arranged on two sides of the lower roller, the rotating speed is reduced through a single-stage speed reducer, and the transmission direction is changed through a screw rod, a screw nut, a worm wheel and worm (together forming a screw rod screw nut worm wheel worm gear transmission pair). The upper roller, the left roller and the right roller adopt round rollers, and the lower roller adopts elliptic rollers. One end of the lower roller is connected with the indexing device through a coupler, and the lower roller can be rotated to contact the bus with the plate according to the hardness of the coiled plate material. When the hardness of the plate is higher, the reaction force generated on the lower roller is larger, and the lower roller can be rotated to enable the long-axis bus of the elliptical section to be in contact with the plate, so that the deflection of the lower roller is reduced. The indexing turntable is divided into six stations, and when the hardness of the coiled plate material is low, an elliptical short-axis bus can be adopted to contact with the plate, so that the process range of the four-roller plate bending machine is enlarged.

Description of the drawings: FIG. 1 is a schematic diagram of barrel-shaped deformation during processing of a common veneer reeling machine;

FIG. 2 is a front view of an assembly view of the apparatus of the present invention;

FIG. 3 is an enlarged partial view of portion B of FIG. 2;

FIG. 4 is a cross-sectional view of the left side view of FIG. 2;

FIG. 5 is a top view of an assembled view of the apparatus of the present invention;

FIG. 6 is a cross-sectional view, section A-A, of an assembly drawing of the apparatus of the present invention;

FIG. 7 is a front view of the indexing turntable;

FIG. 8 is a schematic view of a rolled sheet with a lower roll being a circular shaft;

fig. 9 is a schematic view of a roll sheet when the lower roll is an elliptical axis.

The specific embodiment is as follows: as shown in fig. 2-7, the adjustable four-roller plate bending machine comprises an upper roller 8, a side roller 9, a lower roller 10, a side roller driven by a side roller motor 14, a main motor (not shown in the assembled drawing) for driving the upper roller 8, a speed reducer 16 connected with the side roller motor 14 through a coupler 15, a worm shaft 19 connected with the worm shaft 19 through a coupler 17, a worm wheel 28 meshed with the worm shaft 19, a worm wheel 28, a nut 39, a pressing sleeve 37 and a nut 40 fixed together through a first screw 36, a nut 40 fixed with a support 41 through threaded connection, and a worm wheel 28 driving the nut 39 and the nut 40 to rotate, and a lead screw 20 driving a bearing seat 29 and the side roller 9 to complete the telescopic action. The worm shaft 19 is fixed to the right bracket 11 via the first rolling bearing 18, the bearing cap 21 seals, and the worm shaft 19 transmits torque to the shaft 24 via the coupler 22 and the key 23, and further to the other end of the side roller 9 using the same transmission member. The upper roller 8 is fixed on the left bracket 6 and the right bracket 11 through a second rolling bearing 7, the second screw 5 is used for disassembling an upper cover of the left bracket 6, and the left bracket 6 and the right bracket 11 are respectively fixed on the base through bolts 42. The lower roller 10 pushes the hydraulic guide rod 35 through the hydraulic cylinder 38, the hydraulic guide rod 35 is connected through the pin shaft 34 and pushes the bearing support 33, the lower roller 10 is fixed on the bearing support 33 through the third rolling bearing 32, the bearing support is contacted with the guide rail 30 through the clamping groove, and the guide rail cross beam 31 fixes the transverse guide rail. The rotary position of the lower roller 10 can be controlled by the handle 1 outside the left side bracket, the handle 1 is supported by the end cover, the lower roller 10 is driven to rotate by the rotary handle 1 through the coupler, and the handle 1 drives the indexing positioning pin 2 to be inserted into the positioning hole of the indexing turntable 3 to lock the rotary position of the lower roller 10. As shown in fig. 8, when the lower roller is a circular shaft, the deflection of the lower roller is large when the sheet material strength is high, and barrel-shaped deformation is easily caused. When the lower roller is an elliptical shaft, and a long-axis bus is adopted to contact the plate, the deflection of the shaft is minimum, so that the barrel-shaped deformation of the plate can be reduced. According to the strength of different plates, the positions of the handle 1 and the indexing positioning pin 2 can be adjusted to adapt to different requirements so as to reduce barrel-shaped deformation. In summary, the lower roller of the four-roller plate bending machine is processed into the elliptical roller, the theoretical basis of different deflection is obtained by acting on different buses of the elliptical roller according to the same uniform load, and the angle of the lower roller is adjusted by the dividing device according to different plates, so that the deflection can be reduced to adapt to different requirements.

Claims

1. An adjustable four-roller plate bending machine comprises an upper roller (8), a side roller (9), a lower roller (10), a side roller driven by a side roller motor (14), a side roller motor (14) connected with a speed reducer (16) through a coupler (15) and then connected with a worm shaft (19) through a coupler (17), the worm shaft (19) is meshed with a worm wheel (28), the worm wheel (28), a nut (39), a pressing sleeve (37) and a nut (40) are fixed together through a first screw (36), the nut (40) is fixed with a support (41) through threaded connection, the worm wheel (28) drives the nut (39) and the nut (40) to rotate, a lead screw (20) drives a bearing seat (29) and the side roller (9) to complete telescopic action, the worm shaft (19) is fixed on a right support (11) through a first rolling bearing (18), a bearing end cover (21) plays a sealing role, the worm shaft (19) transmits torque to the worm shaft (24) through the coupler (22) and a key (23), and then the other end cover (9) of a transmission part is used for transmitting torque to the same through the second support (6) on the left support (6) through the left support (7), the left bracket (6) and the right bracket (11) are respectively fixed on the base through bolts (42), the lower roller (10) pushes the hydraulic guide rod (35) through the hydraulic cylinder (38), the hydraulic guide rod (35) is connected through the pin roll (34) and pushes the bearing support (33), the lower roller (10) is fixed on the bearing support (33) through the third rolling bearing (32), the bearing support is contacted with the guide rail (30) through the clamping groove, the guide rail cross beam (31) is used for fixing the transverse guide rail, the lower roller (10) can control the rotating position outside the left bracket through the handle (1), the handle (1) is supported by the end cover, the rotating handle (1) drives the lower roller (10) to rotate through the coupler, the handle (1) drives the indexing positioning pin (2) to be inserted into the positioning hole of the indexing turntable (3) to lock the rotating position of the lower roller (10), when the lower roller (10) is a round shaft, when the strength of a plate material is higher, the deflection of the lower roller is larger, barrel-shaped deformation is easy to be caused, when the lower roller (10) is an elliptical shaft, a long shaft bus is adopted to contact the plate material, the deflection of the shaft is minimum, the barrel-shaped deformation of the plate material can be reduced, according to the strength of different plate materials, the positions of the handle (1) and the indexing positioning pin (2) can be adjusted to adapt to different requirements to reduce the barrel-shaped deformation, the lower roller (10) has an elliptical cross section shape, the ratio of the length of the elliptical long shaft to the short shaft is 1.1-1.25, and the material is 60SiMnMo, the hardness is HS 40-HS 75, the surface precision is 10-50 um, the material of the indexing turntable (3) is 20 steel carburization, and 2-8 uniformly distributed round holes are processed on the indexing turntable and matched with the indexing positioning pins (2) to limit the bus position of the lower roller (10) contacted with the plate, so that the deflection of the lower roller (10) and the deformation of the plate are indirectly regulated.