A one-step roll forming machine for agricultural wheel rims

Abstract

The utility model relates to the technical field of rim manufacturing equipment discloses a one-time roll type forming machine of agricultural machine rim, including drive motor and roll -in mechanism, roll -in mechanism includes main shaft mould, upper guide pulley, lower guide pulley, the cylinder of drive upper guide pulley and lower guide pulley, auxiliary shaft mould, protection subassembly, the hydraulic station for driving auxiliary shaft mould rotation and the oil cylinder no.

Description

Technical Field

[0001] This utility model relates to the field of wheel rim manufacturing equipment technology, and in particular to a one-time roll forming machine for agricultural machinery wheel rims. Background Technology

[0002] Agricultural machinery wheel rims are key load-bearing components of agricultural machinery. They are manufactured using roll forming technology. Roll forming involves rotating a cylindrical workpiece driven by a main shaft mold while applying enormous radial pressure to a secondary shaft mold or roller, causing the workpiece to undergo plastic deformation and ultimately conform to the mold to form the required contour. When rolling large agricultural machinery wheel rims, the equipment needs to apply extremely high radial pressure. The main shaft mold usually acts as a cantilever structure to bear this pressure, which causes bending deformation at the free end of the main shaft mold, directly affecting the dimensional accuracy of the finished wheel rim. At the same time, large workpieces will experience unstable displacement during rotation and pressure, further reducing the stability of the processing.

[0003] In addition, in existing rolling equipment, the main shaft mold rotates actively, while the auxiliary shaft mold mostly rotates passively following the workpiece. Under huge positive pressure, there is a significant difference in rotational speed and relative sliding between the main and auxiliary molds and the workpiece surface. This relative sliding generates severe friction, causing scratches or marks on the workpiece surface, which seriously affects the finished quality of the rim.

[0004] Therefore, this utility model proposes a one-time roll forming machine for agricultural machinery rims to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the existing technology of one-time roll forming device for agricultural machinery rims, the main shaft mold is prone to bending and deformation under huge pressure during rolling, which affects the forming accuracy. In addition, the workpiece is prone to force displacement during processing. At the same time, the relative sliding friction between the main and auxiliary molds and the workpiece causes damage to the workpiece surface. The present invention aims to provide a one-time roll forming machine for agricultural machinery rims with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a one-time roll forming machine for agricultural machinery rims, including: a drive motor, and a rolling mechanism connected to the output end of the drive motor, the rolling mechanism including a main shaft mold driven to rotate by the drive motor;

[0007] The rolling mechanism further includes an upper guide wheel located on the upper side of the main spindle mold, a lower guide wheel located on the lower side of the main spindle mold, a cylinder for driving the upper guide wheel and the lower guide wheel, a secondary spindle mold for rolling in cooperation with the main spindle mold, a protective component for constraining the main spindle mold, a hydraulic station for driving the secondary spindle mold to rotate, and a second oil cylinder for pushing the secondary spindle mold to move toward the main spindle mold.

[0008] Preferably, the end of the piston of the hydraulic cylinder is hinged to the outer wall of the protective sleeve, and the protective sleeve is fitted onto the right end of the main shaft mold.

[0009] Preferably, there are multiple cylinders, and the cylinders are installed at the ends of the upper guide wheel and the lower guide wheel.

[0010] Preferably, the cylinder is configured to advance the upper guide wheel and the lower guide wheel to adjust their positions and provide guiding pressure.

[0011] Preferably, the hydraulic station is configured to drive the auxiliary shaft mold to rotate, thereby reducing the speed difference between the main shaft mold and the auxiliary shaft mold.

[0012] Preferably, the upper guide wheel and the lower guide wheel are configured to make rolling contact with the corresponding sides of the workpiece during processing.

[0013] Preferably, the rated operating pressure of the rolling mechanism is 12 MPa.

[0014] Preferably, the diameter of the main spindle mold and the secondary spindle mold ranges from 19 to 42 inches.

[0015] Preferably, the width of the main shaft mold and the secondary shaft mold is 850 mm.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model, by setting up a protective component, uses a protective sleeve to provide radial constraint when the spindle mold is working, and works in conjunction with the upper and lower guide wheels driven by the cylinder to guide the workpiece, solves the problems in the prior art where the spindle mold is prone to bending and deformation under heavy load and the workpiece is prone to force displacement during rolling, thereby achieving the effect of improving the overall rigidity of the equipment and ensuring the accuracy of rolling forming.

[0018] 2. This utility model solves the problem in the prior art where the difference in rotation speed between the main and auxiliary molds leads to relative sliding and severe friction damage to the workpiece surface, by setting up a hydraulic station to drive the auxiliary shaft mold to rotate. The rotation speed is matched with that of the main shaft mold, thus achieving the effect of effectively protecting the workpiece and improving the surface quality of the finished wheel rim. Attached Figure Description

[0019] Figure 1 This is a front view of a one-time roll forming machine for agricultural machinery wheel rims proposed in this utility model;

[0020] Figure 2 This is a perspective view of a one-time roll forming machine for agricultural machinery wheel rims proposed in this utility model;

[0021] Figure 3This is a side view of a one-time roll forming machine for agricultural machinery wheel rims proposed in this utility model;

[0022] Figure 4 This is a top view of a one-time roll forming machine for agricultural machinery wheel rims proposed in this utility model.

[0023] Legend:

[0024] 1. Drive motor; 2. Rolling mechanism; 201. Main shaft mold; 202. Upper guide wheel; 203. Cylinder; 204. Lower guide wheel; 205. Sub-shaft mold; 206. Protective components; 2061. Cylinder 1; 2062. Protective sleeve; 207. Hydraulic station; 208. Cylinder 2. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Example:

[0027] Please refer to Figures 1 to 4 This utility model provides a one-time roll forming machine for agricultural machinery rims, aiming to solve the problems in the prior art where, when roll forming large agricultural machinery rims, the main shaft mold 201 is prone to bending and deformation under huge radial pressure, resulting in a decrease in forming accuracy. At the same time, the workpiece is prone to force displacement during processing, and the relative sliding friction between the main and auxiliary molds and the workpiece can easily cause damage to the workpiece surface.

[0028] like Figure 1 and Figure 2As shown, a one-time roll forming machine for agricultural machinery wheel rims includes a drive motor 1 and a rolling mechanism 2 connected to the output end of the drive motor 1. The drive motor 1 provides the main power source for the entire device and is fixedly mounted on a frame (not shown). The rolling mechanism 2 performs specific roll forming actions on the agricultural machinery wheel rim workpiece. The rolling mechanism 2 includes a main shaft mold 201 driven to rotate by the drive motor 1. The main shaft mold 201 is the main component for performing roll forming. The rotating shaft of the main shaft mold 201 is connected to the output shaft of the drive motor 1. The rolling mechanism 2 also includes components disposed on the main shaft mold. The upper guide wheel 202 on the upper side of the main spindle mold 201, and the rolling mechanism 2 also includes a lower guide wheel 204 located on the lower side of the main spindle mold 201. The upper guide wheel 202 and the lower guide wheel 204 are used to guide and limit the workpiece during the rolling process. The wheel surfaces of the upper guide wheel 202 and the lower guide wheel 204 are in rolling contact with the workpiece surface. The upper guide wheel 202 and the lower guide wheel 204 are configured to make rolling contact with the corresponding sides of the workpiece during processing. The rolling mechanism 2 also includes cylinders 203 for driving the upper guide wheel 202 and the lower guide wheel 204. There are multiple cylinders 203, and the cylinder bodies of the cylinders 203 are fixedly connected to the frame. The piston rod end of cylinder 203 is mounted or connected to the ends or brackets of the upper guide wheel 202 and the lower guide wheel 204. Cylinder 203 is configured to advance the upper guide wheel 202 and the lower guide wheel 204 to adjust their positions and provide guiding pressure. The rolling mechanism 2 also includes a secondary shaft mold 205 for rolling with the main shaft mold 201. The axis of the secondary shaft mold 205 is parallel to the axis of the main shaft mold 201. The contour surface of the secondary shaft mold 205 mates with the contour surface of the main shaft mold 201 to jointly shape the rim shape. The rolling mechanism 2 further includes a protective component 2 for constraining the main shaft mold 201. 06. The protection component 206 is located at the end of the main spindle mold 201 away from the drive motor 1. The rolling mechanism 2 also includes a hydraulic station 207 for driving the secondary spindle mold 205 to rotate. The rolling mechanism 2 also includes a second cylinder 208 for pushing the secondary spindle mold 205 toward the main spindle mold 201. The cylinder body of the second cylinder 208 is fixed on the frame. The piston rod end of the second cylinder 208 is connected to the bearing seat of the secondary spindle mold 205. The hydraulic station 207 drives the secondary spindle mold 205 to rotate through hydraulic pipelines to reduce the speed difference between the main spindle mold 201 and the secondary spindle mold 205.

[0029] Please refer to Figure 1 and Figure 2The protective assembly 206 includes a hydraulic cylinder 2061 and a protective sleeve 2062. The cylinder body of the hydraulic cylinder 2061 is fixedly connected to a frame (not shown) via a bracket. The piston rod end of the hydraulic cylinder 2061 is rotatably connected to the connecting lug of the protective sleeve 2062. The protective sleeve 2062 can rotate around its own axis. The moving piston end of the hydraulic cylinder 2061 is hinged to the outer wall of the protective sleeve 2062. The protective sleeve 2062 is fitted onto the right end of the main shaft mold 201. The inner hole of the protective sleeve 2062 has an annular groove. The main spindle mold 201 is equipped with a rolling bearing. The inner ring of the rolling bearing is in sliding or rolling fit with the journal of the free end of the main spindle mold 201. When the main spindle mold 201 is subjected to working force, the hydraulic cylinder 2061 is activated. The protective sleeve 2062 is flipped under the push of the hydraulic cylinder 2061 and radially fitted onto the right end of the main spindle mold 201. This structure provides a reliable radial constraint to the free end of the main spindle mold 201, which can effectively prevent the main spindle mold 201 from bending and deforming due to the huge radial pressure during the roll forming process.

[0030] Please refer to Figure 3 and Figure 4 Multiple cylinders 203 are installed or support the ends of the upper guide wheel 202 and the lower guide wheel 204 or their respective support arms. The cylinder body of the cylinder 203 is fixedly connected to the corresponding position of the frame. The piston rod of the cylinder 203 is rotatably connected to the bearing seat or support arm of the upper guide wheel 202 and the lower guide wheel 204. The cylinder 203 is configured to push the upper guide wheel 202 and the lower guide wheel 204 to adjust their position radially or at a specified angle and provide guiding pressure. The upper guide wheel 202 is installed on the upper side of the spindle mold 201, and the lower guide wheel 204 is installed on the lower side of the spindle mold 201. The upper guide wheel 202 and the lower guide wheel 204 are configured to roll in contact with the corresponding side of the workpiece during processing. Through the extension and retraction of the cylinder 203, the upper guide wheel 202 and the lower guide wheel 204 cooperate with the spindle mold 201 to ensure that the workpiece does not shift under force during processing when the workpiece rotates, thus ensuring the geometric accuracy of the roll forming.

[0031] Please refer to Figure 1 and Figure 2The cylinder body of hydraulic cylinder 208 is fixed on the frame. The piston rod end of hydraulic cylinder 208 is fixedly connected to the bearing seat of the secondary shaft mold 205. The bearing seat of the secondary shaft mold 205 is mounted on a linear guide rail. Hydraulic cylinder 208 is configured to push the bearing seat of the secondary shaft mold 205 toward the main shaft mold 201, so that the contour surface of the secondary shaft mold 205 presses against the workpiece. Hydraulic station 207 is connected to a hydraulic motor installed on the shaft end of the secondary shaft mold 205 through a high-pressure oil pipe. Hydraulic station 207 is configured to drive the secondary shaft mold 205 to assist in rotation. The rotation speed of the secondary shaft mold 205 is controlled by the servo valve of hydraulic station 207. This assisted rotation keeps the contour surface linear velocity of the secondary shaft mold 205 dynamically consistent with the contour surface linear velocity of the main shaft mold 201, so as to reduce the speed difference between the main shaft mold 201 and the secondary shaft mold 205, thereby avoiding severe friction between the mold and the workpiece and protecting the surface quality of the workpiece.

[0032] As a specific implementation plan, in order to ensure the high pressure required for roll forming, the rated operating pressure of the roll forming mechanism 2 is preferably 12 MPa. This pressure value is mainly determined by the specifications of the hydraulic station 207 and the second cylinder 208. The hydraulic station 207 integrates a high-pressure oil pump, an accumulator, and a servo control valve group. The hydraulic station 207 is connected to the first cylinder 2061 and the second cylinder 208 respectively through high-pressure explosion-proof oil pipes. The cylinder diameter and piston rod diameter of the second cylinder 208 are designed to output sufficient thrust under this pressure. The specifications of the first cylinder 2061 are also matched to this pressure system. All seals and valve bodies in the entire hydraulic circuit are made of high-pressure resistant materials to ensure stable operation under the rated pressure of 12 MPa. The pneumatic circuit of the cylinder 203 is set independently, and its working pressure is lower than that of the hydraulic system.

[0033] In a preferred embodiment, to accommodate the specifications of large agricultural machinery wheel rims, the diameter range of the main shaft mold 201 and the auxiliary shaft mold 205 is set to 19 to 42 inches. Simultaneously, the width of the main shaft mold 201 and the auxiliary shaft mold 205 is preferably 850 mm. Both the main shaft mold 201 and the auxiliary shaft mold 205 are forged from high-strength, high-wear-resistant mold steel. The shaft body of the main shaft mold 201 has sufficient torsional and bending stiffness. The right end of the main shaft mold 201, i.e., the part where the protective sleeve 2062 is fitted, undergoes high-frequency quenching treatment to increase its durability. The main body of the spindle mold 201 can be designed as a detachable structure to facilitate the replacement of mold heads with different diameters or contours. The structure of the auxiliary spindle mold 205 corresponds to that of the main spindle mold 201. The auxiliary spindle mold 205 is mounted on the bearing seat pushed by the hydraulic cylinder 208 via heavy-duty needle roller bearings. The hydraulic motor driven by the hydraulic station 207 is rotatably connected to the shaft tail of the auxiliary spindle mold 205 via a coupling. The diameter and installation position of the upper guide wheel 202 and the lower guide wheel 204 are also designed to be adjustable to accommodate different workpiece diameters in the range of 19 to 42 inches.

[0034] As a preferred embodiment, the drive motor 1 is preferably a high-power variable frequency servo motor. The output shaft of the drive motor 1 is fixedly connected to the input flange of the spindle mold 201 through a high-torque reduction gearbox. Both the reduction gearbox and the drive motor 1 are mounted on the heavy-duty base of the frame. The rotation speed of the spindle mold 201 can be precisely adjusted through variable frequency servo control.

[0035] In a preferred embodiment, the wheel surfaces of the upper guide wheel 202 and the lower guide wheel 204 are preferably made of high-hardness alloy steel, and the wheel surface shape matches the corresponding surface contour of the workpiece to be processed. The upper guide wheel 202 and the lower guide wheel 204 are both mounted on their respective support arms through tapered roller bearings. The support arms are then rotatably connected to the piston rod of the cylinder 203, and the cylinder body of the cylinder 203 is hinged to the frame.

[0036] In a preferred embodiment, the complete set of equipment also includes a central control cabinet (not shown), which integrates a programmable logic controller (PLC) and a human-machine interface (HMI). The PLC is electrically connected to the servo driver of the drive motor 1, the electromagnetic servo valve of the hydraulic station 207, the electromagnetic valve group of the cylinder 203, and the control valves of the first cylinder 2061 and the second cylinder 208. The PLC is used to coordinate the rotational speed of the main spindle mold 201, the advancing speed and auxiliary speed of the secondary spindle mold 205, and the guiding pressure of the upper guide wheel 202 and the lower guide wheel 204.

[0037] Working principle: The main body of the rolling mechanism 2 is the spindle mold 201. The spindle mold 201 is driven by the drive motor 1, which drives the spindle mold 201 to rotate. The upper guide wheel 202 is installed on the upper side of the spindle mold 201 and the lower guide wheel 204 is installed on the lower side. They cooperate with the spindle mold 201 to guide the workpiece and ensure that the workpiece will not be deviated under force during processing. The upper guide wheel 202 and the lower guide wheel 204 are driven by multiple cylinders 203 installed at the end. The cylinders 203 push the upper guide wheel 202 and the lower guide wheel 204 to adjust their positions according to the workpiece processing needs, and at the same time provide the pressure required for guidance. The protective component 206 is used to protect the spindle mold 201 and prevent the spindle mold 201 from bending axially during operation. When the spindle mold 201 is subjected to working force, the hydraulic cylinder 2061 is activated to push the protective sleeve 2062 to flip and fit on the right end of the spindle mold 201, thereby providing radial constraint to the spindle mold 201.

[0038] After the main spindle mold 201 starts working, the second hydraulic cylinder 208 is activated to push the secondary spindle mold 205 to move towards the main spindle mold 201. The secondary spindle mold 205 is driven to rotate by the hydraulic station 207 to reduce the relative sliding caused by the difference in rotation speed between the main spindle mold 201 and the secondary spindle mold 205, which would cause severe friction with the workpiece and ultimately damage it. The rated operating pressure of the entire equipment is 12 MPa. The diameter range of the main spindle mold 201 and the secondary spindle mold 205 is 19-42 inches, and the width is 850 mm.

Claims

1. A one-time roll forming machine for agricultural machinery wheel rims, comprising a drive motor (1) and a rolling mechanism (2) connected to the output end of the drive motor (1), wherein the rolling mechanism (2) comprises a main shaft mold (201) driven to rotate by the drive motor (1). Its features are, The rolling mechanism (2) further includes: an upper guide wheel (202) disposed on the upper side of the main spindle mold (201), a lower guide wheel (204) disposed on the lower side of the main spindle mold (201), a cylinder (203) for driving the upper guide wheel (202) and the lower guide wheel (204), a secondary spindle mold (205) for rolling with the main spindle mold (201), and a protective component (206) for constraining the main spindle mold (201). The rolling mechanism (2) further includes: a hydraulic station (207) for driving the sub-shaft mold (205) to rotate and a second oil cylinder (208) for pushing the sub-shaft mold (205) toward the main shaft mold (201).

2. The one-time roll forming machine for agricultural machinery wheel rims according to claim 1, characterized in that, The protective component (206) includes a hydraulic cylinder (2061) and a protective sleeve (2062).

3. The one-time roll forming machine for agricultural machinery wheel rims according to claim 2, characterized in that, The end of the piston of the hydraulic cylinder (2061) is hinged to the outer wall of the protective sleeve (2062), and the protective sleeve (2062) is fitted on the right end of the main shaft mold (201).

4. The one-time roll forming machine for agricultural machinery wheel rims according to claim 1, characterized in that, The cylinder (203) is configured to push the upper guide wheel (202) and the lower guide wheel (204) to adjust their positions and provide guiding pressure.

5. A one-time roll forming machine for agricultural machinery wheel rims according to claim 1, characterized in that, The hydraulic station (207) is configured to drive the auxiliary shaft mold (205) to rotate in order to reduce the speed difference between the main shaft mold (201) and the auxiliary shaft mold (205).

6. A one-time roll forming machine for agricultural machinery wheel rims according to claim 1, characterized in that, There are multiple cylinders (203), and the cylinders (203) are installed at the ends of the upper guide wheel (202) and the lower guide wheel (204).

7. A one-time roll forming machine for agricultural machinery wheel rims according to claim 1, characterized in that, The upper guide wheel (202) and the lower guide wheel (204) are configured to make rolling contact with the corresponding sides of the workpiece during processing.

8. A one-time roll forming machine for agricultural machinery wheel rims according to claim 1, characterized in that, The rated operating pressure of the rolling mechanism (2) is 12 MPa.

9. A one-time roll forming machine for agricultural machinery wheel rims according to claim 1, characterized in that, The diameter range of the main shaft mold (201) and the secondary shaft mold (205) is 19 to 42 inches.

10. A one-time roll forming machine for agricultural machinery wheel rims according to claim 9, characterized in that, The width of the main shaft mold (201) and the secondary shaft mold (205) is 850 mm.

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