Implementation method of three-roller four-roller plate rolling machine for rolling conical cylinder

Abstract

According to the method, a cone rolling device is additionally arranged between an upper roll shaft and a lower roll shaft of the plate rolling machine, reverse resistance is provided through friction between the cone rolling device and materials, the rotating speed of a small round end is reduced, and when the upper roll shaft and the lower roll shaft rotate synchronously, the speed difference is generated between a large round end and the small round end, and the conicity is formed. By additionally arranging the cone rolling device, the cone rolling function can be achieved on the three-roller four-roller plate rolling machine. According to the implementation method, the machining efficiency is high, the finished product quality is stable, the machining requirements of various tapers and various pipe diameters are met, the adjustment time of a single-time positioning device is shortened, the production efficiency is high, and the quality is stable. And meanwhile, on the premise that the original machine type is not adjusted, the machining function and range of equipment are increased, the production efficiency and machining quality of the rolled conical pipe are improved, and the manual adjustment time and labor intensity are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of thin plate cone rolling processing, and in particular to a method for using a three-roller or four-roller plate rolling machine to roll a cone. Background Art

[0002] During the production and processing of thin plate rolling, CNC rolling machine equipment (four-axis) can meet the requirements of automatic rolling of different materials, different material thicknesses and different diameters (the corresponding thickness of the material is determined in combination with the actual machine model). CNC programs can be used to process and shape equal-diameter round tubes, replacing the manual adjustment and positioning method, improving production efficiency and processing quality, and reducing the labor intensity of production personnel.

[0003] In the forming process of rolled cones, the existing CNC rolling machine models cannot realize the forming process of rolled cones through automatic positioning. There are two traditional methods for processing rolled cones: 1. Equal diameter roller processing equipment (general equipment). A positioning device must be set up each time to manually intervene to adjust the angle difference. In a single process, the large and small round angle differences must be adjusted multiple times to meet the requirements of the drawing. The error value between the finished product size and the theoretical size is large, and the gap between the finished product joints is inconsistent, resulting in a low pass rate. This method is suitable for the production of small batch orders and has low production efficiency. 2. Conical roller processing equipment (professional equipment). This type of equipment has a relatively simple forming process and is suitable for large-scale production and processing. The processing of non-standard product sizes cannot meet the needs, and professional equipment conical rollers need to be replaced. The comprehensive cost is high and the function is relatively single. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a method for realizing a three-roller and four-roller plate rolling machine for rolling a cone, so as to solve the problems raised in the above background technology. The present invention adds a cone rolling device to form a speed difference when the large round end and the small round end rotate synchronously, and finally realizes the function of rolling a cone.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a method for implementing a three-roller and four-roller plate rolling machine for rolling cones, in which a cone rolling device is added between the upper and lower rollers of the plate rolling machine, and its function is to provide a positioning point for controlling the small end arc to be tangent to the cone rolling device during the processing of fan-shaped materials. As a positioning point, the cone rolling device provides friction and generates reverse resistance during the feeding process. When the upper and lower shafts rotate synchronously, the large end arc and the small end arc can generate a speed difference. By coordinating with the upper and lower shafts to rotate and feed, the equipment automatically completes the control of the taper and the forming diameter at both ends.

[0006] Furthermore, the following processes are also included: initial positioning, determining the small end arc diameter, achieving differential speed control and rolling cone forming.

[0007] Furthermore, in the initial positioning process, the positioning of the fan-shaped unfolded material, the logical operation of the plate rolling machine equipment includes: the upper shaft of the plate rolling machine is fixed, the lower shaft and the side shaft of the plate rolling machine are loosened by a specified distance to facilitate feeding, and after the above actions are completed, the unfolded material in the unfixed state is positioned. (Note: The minimum end diameter of the cone is larger than the diameter of the upper shaft) Furthermore, when the unfolded material is positioned, the vertex of the large end arc is aligned with the generatrix of the side shaft, and the vertex of the small end arc is aligned with the arc of the fixing device.

[0008] Furthermore, the process of determining the small end arc diameter includes: when starting the feeding process, the lower shaft of the plate rolling machine rises to clamp the workpiece, and rises to a specified height through the side shaft to control the diameter value of the small end arc segment of the cone, and the upper and lower shafts rotate simultaneously for feeding processing.

[0009] Furthermore, during the differential speed control process, the material is fed simultaneously during the operation of the upper and lower shafts of the plate rolling machine, and the plate is fed in the direction of the shaft rotation through the clamping force of the upper and lower shafts.

[0010] Furthermore, when the rolling cone device is in contact, the upper and lower shafts rotate synchronously, and the arc edge of the small end rotates around the tangent point of the rolling cone device, and the trajectory is converted from a normal plane arc to a tangential diameter arc segment; the rolling cone device applies a friction force to the small arc segment of the fan-shaped expanded material in the feeding direction, providing reverse resistance, and the speed at the large arc end remains unchanged, while the speed of the small arc end is reduced due to obstruction, so that a speed difference is formed at the two end arcs.

[0011] Furthermore, the cone cylinder forming includes the following process: in the process of continuous feeding, under the premise that the relative positions of the plate and the side shaft and the upper and lower shafts are fixed, an inclination angle is generated between the axis of the cone and the axis of the upper shaft through the differential effect, and the cone cylinder is formed after completing a full rotation.

[0012] Beneficial effects of the present invention: The three-roller and four-roller plate rolling machine is used for rolling cones. By adding a cone rolling device, when the upper and lower shafts rotate synchronously, the arcs at both ends form a speed difference to realize the cone rolling function. By linking with the parameters in the program, the plate generatrix and the side shaft generatrix are adjusted to coincide after positioning, and the production and processing of the cone tube are completed under different angle settings. It can be clamped and positioned perfectly at one time, with high processing efficiency and stable finished product quality. It meets the processing requirements of various tapers and various pipe diameters, shortens the adjustment time of a single positioning device, and has high production efficiency and stable quality.

[0013] The implementation method of the three-roller and four-roller plate rolling machine for rolling cone tubes increases the processing function and range of the equipment without adjusting the original model, improves the production efficiency and processing quality of rolling cone tubes, and reduces the time and labor intensity of manual adjustment. After debugging, the production of a single cone tube can be completed within 1 minute, ensuring the uniformity of the finished product forming curvature and the consistency of the upper and lower joint gaps, facilitating subsequent welding, and completely solving the problem of multiple adjustments required when the taper and tube diameter change, and the high comprehensive cost of replacing equipment molds, thereby ensuring the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the front end appearance of the plate rolling machine of the present invention; Figure 2 This is a rear end structural diagram of the plate rolling machine equipment of the present invention; Figure 3 It is a front view of the plate rolling machine device of the present invention; Figure 4 It is a side view of the plate rolling machine part of the present invention; Figure 5 It is a structural diagram of the cone rolling device part of the present invention; In the figure: 1. bracket; 2. cone barrel; 3. cone rolling device; 4. upper shaft assembly; 5. dumping cylinder. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0016] See also Figures 1 to 5 The present invention provides the following technical solutions: a method for realizing a three-roller or four-roller plate rolling machine for rolling a cone, in which the upper and lower roller axes and the side shaft axes of the three-roller / four-roller plate rolling machine used in the method are in a parallel state, and a cone rolling device 3 is added to ensure that the generatrix of the workpiece coincides with the generatrix of the active roller. During the production and processing, there is a certain speed difference between the large and small arcs, that is, the speed of the large diameter section remains unchanged, and the speed of the small diameter section is reduced. The two arcs are completed at the same time within one time, and finally the cone rolling function is realized.

[0017] In this embodiment, a cone rolling device 3 is added between the upper and lower rollers of the plate rolling machine. The cone rolling device 3 is used to provide a positioning point and has its own arc surface, which is used to control the small diameter segment of the arc to be tangent to the cone rolling device 3 during the processing of the fan-shaped material. The cone rolling device 3 is tangent to the small diameter segment of the fan-shaped material in the axial direction, and the friction force is provided by the cone rolling device 3. Reverse resistance is generated during the feeding process to realize the function of speed difference. Through the cooperation with the upper and lower shafts to rotate the feeding, the equipment automatically completes the control of the taper and the forming diameter at both ends.

[0018] Among them, the cone rolling device 3 is installed on the right side of the rolling machine equipment, between the upper and lower rollers, and a dumping cylinder 5 is installed on its right side. The inner side of the dumping cylinder 5 is connected to the upper shaft assembly 4, and the cone barrel 2 is on the outer side of the upper shaft assembly 4, and a bracket 1 is installed on the top of the cone barrel 2.

[0019] Without adjusting the original model of the plate rolling machine, this solution increases the processing function and range of the equipment, improves the production efficiency and processing quality of rolled conical tubes, reduces the time and labor intensity of manual adjustment, and after debugging, the production of a single conical tube can be completed within 1 minute, ensuring the uniformity of the finished product's forming curvature and the consistency of the upper and lower joint gaps, facilitating subsequent welding, and completely solving the problem of multiple adjustments required when the taper and tube diameter change, and the high comprehensive cost of replacing equipment molds, thereby ensuring the quality of the finished product.

[0020] During use, after the semi-finished product is positioned, the device is tangent to the small diameter section in the axial direction and used in conjunction with the equipment to generate friction and provide reverse resistance, acting as a support point to ensure the consistency of the cone surface forming during the forming process.

[0021] This embodiment also provides a fan-shaped expansion material test piece and performs the following debugging process for illustration: (1) Initial positioning: Positioning of fan-shaped unfolded material, logical operation of the equipment: the upper shaft is fixed, the lower shaft and the side shaft are loosened by a specified distance to facilitate feeding. After the above actions are completed, the unfolded material is positioned (not fixed), the vertex of the large end arc is aligned with the generatrix of the side shaft, and the vertex of the small end arc is aligned with the arc of the cone device.

[0022] (2) Determine the diameter of the small end arc: When the feeding process starts, the lower shaft rises to clamp the workpiece and rises to a specified height through the side shaft to control the diameter value of the small end arc segment of the cone. After the side shaft is positioned, the upper and lower shafts rotate simultaneously for feeding processing.

[0023] (3) Realize differential speed control: During the synchronous rotation of the upper and lower rollers, the plate is fed in the direction of the shaft rotation through the clamping force of the upper and lower shafts. When the cone device 3 contacts, the small diameter arc edge rotates with the tangent point of the cone device 3, and the trajectory is converted from a normal plane arc to a tangent diameter arc segment. The function of this device is to generate friction with the fan-shaped unfolded material in the feeding direction, forming resistance, so that the large and small arc segments have a differential speed (the large arc has a normal rotation speed, and the small arc has a reduced speed), and the taper value required for natural forming is achieved.

[0024] (4) Cone forming: During the continuous feeding process, under the premise that the relative position of the plate and the side shaft and the upper and lower shafts is fixed, due to the influence of the differential speed, an inclination angle is generated between the axis of the cone and the axis of the upper shaft. This angle is the forming angle of the cone. By completing a full rotation, the cone is formed.

[0025] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for implementing a three-roller or four-roller plate rolling machine for rolling a cone, characterized in that: In this method, a cone rolling device is added between the upper and lower rollers of the plate rolling machine. The cone rolling device provides a positioning point for the small arc segment and has its own arc surface. It acts as a support point and generates friction with the fan-shaped material during the processing process. The feeding process can provide reverse resistance, reduce the rotation speed of the small circle end, and realize the function of the speed difference at both ends. With the cooperation of the synchronous rotation of the upper and lower shafts to feed the material, the equipment automatically completes the control of the taper and the forming diameter at both ends.

2. The method for implementing a three-roller or four-roller plate rolling machine for rolling a cone according to claim 1 is characterized in that: The following processes are also included: initial positioning, determining the small end arc diameter, achieving differential speed control and forming a tapered cylinder.

3. The method for implementing a three-roller or four-roller plate rolling machine for rolling a cone according to claim 2 is characterized in that: During the initial positioning process, the positioning of the fan-shaped unfolded material, the logical operation of the plate rolling machine equipment includes: the upper shaft of the plate rolling machine is fixed, the lower shaft and the side shaft of the plate rolling machine are loosened by a specified distance to facilitate feeding, and after the above actions are completed, the unfolded material in the unfixed state is positioned. (Note: The minimum end diameter of the cone is larger than the diameter of the roll).

4. The method for implementing a three-roller or four-roller plate rolling machine for rolling a cone according to claim 3 is characterized in that: When the unfolded material is positioned, the apex of the large end arc is aligned with the generatrix of the side shaft, and the apex of the small end arc is aligned with the arc of the cone rolling device.

5. The method for implementing a three-roller or four-roller plate rolling machine for rolling a cone according to claim 2 is characterized in that: The process of determining the small end arc diameter includes: when starting the feeding process, the lower shaft of the plate rolling machine rises to clamp the workpiece, and rises to a specified height through the side shaft to control the diameter value of the small end arc segment of the finished cone, and the upper and lower shafts rotate simultaneously for feeding processing.

6. The method for implementing a three-roller or four-roller plate rolling machine for rolling a cone according to claim 1, characterized in that: In the differential speed control process, the material is fed simultaneously during the synchronous operation of the upper and lower rollers of the plate rolling machine. The plate is fed in the direction of the shaft rotation through the clamping force of the upper and lower rollers.

7. The method for implementing a three-roller or four-roller plate rolling machine for rolling a cone according to claim 6, characterized in that: When the cone rolling device contacts, the arc edge of the small end rotates around the arc tangent point of the cone rolling device, and the trajectory is converted from a normal plane arc to a tangential diameter arc segment; the cone rolling device is used to provide a friction force to the fan-shaped unfolded material in the feeding direction, generating a certain resistance. The rotation speed at the large arc end remains unchanged, and the rotation speed at the small arc end is slowed down by the resistance, forming a differential while naturally forming a taper at both ends.

8. The method for implementing a three-roller or four-roller plate rolling machine for rolling a cone according to claim 1, characterized in that: The cone cylinder forming includes the following process: in the process of continuous feeding, under the premise that the relative positions of the plate and the side shaft and the upper and lower shafts are fixed, an inclination angle is generated between the axis of the cone and the axis of the upper shaft through the differential effect, and the cone cylinder is formed after completing a full circle of rotation.

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