A kind of bending tool based on archimedes spiral measures rotation angle

Abstract

The application discloses a kind of based on Archimedes spiral measurement roll bending tool of rotation angle, including base, multiple roll bending units and rotation correction unit;Rotation correction unit includes fixed seat, rotating wheel, measuring block and guide pin;The fixed seat and base fixed connection, rotating wheel is rotatably connected with fixed seat, measuring block is fixedly connected on rotating wheel, and measuring block is equipped with spiral groove, and Archimedes spiral coincides with the spiral groove path and the rotation axis of the same point and rotating wheel coincides;The application is according to Archimedes spiral principle, only needs to be converted into the rotation angle of rotating wheel by digital display range finder instrument determination guide pin displacement distance, and this angle is also the rotation angle of workpiece roll bending by the roll bending unit fixedly connected with rotating wheel, clever structure, without additional use specific mechanical measurement rotation angle after adjusting angle each time, greatly improve work efficiency, and measurement precision is high, guarantee the adjustment accuracy, effectively improve product quality.

Description

Technical Field

[0001] The present invention relates to the field of rolling bending, and in particular to a rolling bending tool for measuring an angle based on an Archimedean spiral. Background Art

[0002] Roll bending is a process that bends sheet metal or profiles along a single arc using several sets of roller units. Typically, single arc-shaped components are mostly formed using this method. When rolling automotive sunroof guide rails, the product will rebound and twist due to stress. Therefore, a correction frame is required to rotate the product to a certain angle for correction to ensure arc accuracy. Existing correction frames for rolling tools cannot measure the rotation angle, making angle adjustment inconvenient. Furthermore, after changing the mold and re-adjusting the rolling tool, the initial adjustment angle position is lost and cannot be accurately restored to the original position, resulting in poor repeatability and wasted debugging time. Therefore, it is practical to design a rolling tool that allows for easy measurement and adjustment of the rotation angle. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a rolling bending tool for measuring the angle based on the Archimedean spiral, so as to solve the problem of inaccurate angle measurement and adjustment in the prior art.

[0004] In order to solve the above technical problems, the present invention provides a rolling bending tool for measuring the angle based on the Archimedean spiral, which includes a base, multiple rolling bending units and a rotation correction unit; each rolling bending unit includes a rolling bracket; the rotation correction unit includes a fixed seat, a rotating wheel, a measuring block and a guide pin; the fixed seat is fixedly connected to the base, the rotating wheel is rotatably connected to the fixed seat, the measuring block is fixedly connected to the rotating wheel, and a spiral groove is provided on the measuring block, and the spiral groove path coincides with an Archimedean spiral whose starting point coincides with the rotation axis of the rotating wheel; the rotating wheel is also fixedly connected to a rolling bracket, and the rotating wheel is used to drive the rolling bending unit fixedly connected to it to rotate a certain angle; the guide pin is slidably connected to the fixed seat, one end of the guide pin is slidably connected to the spiral groove, and the guide pin axis and the rotating wheel axis are in the same plane and perpendicular to each other.

[0005] The fixing seat is also detachably connected with a digital distance meter, and the front end of a measuring rod of the digital distance meter is against one end of a guide pin.

[0006] The rotating wheel is a turbine, and a worm gear meshing with the rotating wheel is rotatably connected to the fixed seat.

[0007] A through hole is provided in the middle of the rotating wheel for a workpiece to pass through.

[0008] Each of the rolling units clamps a skylight guide rail, which is a sheet. The cross-section of the skylight guide rail is a square tube with an open end. One side of the square tube groove opening is provided with a first step portion and a second step portion extending outward, and the other side is provided with a bending portion extending inward.

[0009] The first roller, the second roller, the third roller and the fourth roller are evenly arranged in the circumferential direction in each rolling bending bracket; the middle part of the first roller is provided with a first annular protrusion extending into the square tube groove and abutting against the bottom wall of the square tube groove, the outer peripheral walls of the second roller, the third roller and the fourth roller abut against the three side walls of the square tube respectively, and the first roller presses the second step portion against the end face of the fourth roller through the second annular protrusion arranged on one side, and the first roller abuts against the first step portion and the bending portion.

[0010] The digital display distance measuring instrument is a digital display dial indicator.

[0011] After adopting the above structure, the present invention has the following advantages compared with the prior art: according to the principle of Archimedean screw, the present invention only needs to measure the displacement distance of the guide pin through a digital distance measuring instrument to convert the rotation angle of the rotating wheel. This angle is also the angle at which the workpiece is rolled by the rolling bending unit fixedly connected to the rotating wheel. The structure is ingenious and there is no need to use a specific machine to measure the angle after each angle adjustment, which greatly improves work efficiency and has high measurement accuracy, ensuring adjustment accuracy and effectively improving product quality; the present invention clamps the various parts of the skylight guide rail through four rollers evenly arranged in the circumferential direction, so the force is evenly applied, effectively preventing distortion and breakage, and achieving a good rolling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0013] Figure 2 3D structural diagram of the rotation correction unit of the present invention;

[0014] Figure 3 This is a front view of the rotation correction unit of the present invention;

[0015] Figure 4 Schematic diagram of the internal structure of the rotation correction unit of the present invention;

[0016] Figure 5 Schematic diagram of the roll bending unit structure of the present invention;

[0017] Figure 6 This invention Figure 5 A partial enlarged view of area A in the middle.

[0018] The accompanying drawings are marked as follows: 1. base; 2. rolling unit; 3. rotation correction unit; 4. sunroof guide rail; 21. rolling bracket; 22. first roller; 23. second roller; 24. third roller; 25. fourth roller; 221. first annular protrusion; 222. second annular protrusion; 41. square tube; 411. square tube groove; 42. first step portion; 43. second step portion; 44. bending portion; 31. fixing seat; 32. rotating wheel; 33. measuring block; 34. guide pin; 35. spiral groove; 36. worm; 37. digital distance measuring instrument. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Depend on Figures 1 to 6 As shown, the present invention comprises a rolling tool for measuring the angle of rotation based on the Archimedean spiral, comprising a base 1, a plurality of rolling units 2 and a rotation correction unit 3; each rolling unit 2 comprises a rolling bracket 21; the rotation correction unit 3 comprises a fixed seat 31, a rotating wheel 32, a measuring block 33 and a guide pin 34; the fixed seat 31 is fixedly connected to the base 1, the rotating wheel 32 is rotatably connected to the fixed seat 31, the measuring block 33 is fixedly connected to the rotating wheel 32, and a spiral groove 35 is provided on the measuring block 33, the path of the spiral groove 35 coincides with an Archimedean position at a starting point and the rotation axis of the rotating wheel 32. The Mead spiral coincides; the rotating wheel 32 is also fixedly connected to a rolling bracket 21, and the rotating wheel 32 is used to drive the rolling unit 2 fixedly connected thereto to rotate a certain angle; the guide pin 34 is slidably connected to the fixed seat 31, and one end of the guide pin 34 is slidably connected to the spiral groove 35, and the axis of the guide pin 34 and the axis of the rotating wheel 32 are in the same plane and perpendicular to each other; the fixed seat 31 can also be detachably connected to a digital distance meter 37, and the front end of the measuring rod of the digital distance meter 37 is against one end of the guide pin 34; in this embodiment, the digital distance meter 37 is preferably a digital dial indicator; Figure 3 As shown, the rotating wheel 32 is fixedly connected to a rolling unit 2. The rotation of the rotating wheel 32 drives the rolling unit 2 to rotate to adjust the angle of the workpiece. It should be noted that the rotation axis of the workpiece clamped by the rolling unit 2 should be coaxial with the axis of the rotating wheel 32 to prevent the workpiece from twisting and breaking during rolling. The principle of the rotating correction unit 3 to accurately measure the angle of the workpiece is as follows: Figure 4As shown, a measuring block 33 is provided on the rotating wheel 32. As the measuring block 33 rotates with the rotating wheel 32, the path of the spiral groove 35 on the measuring block 33 coincides with an Archimedean spiral whose starting point coincides with the axis of rotation of the rotating wheel 32, and the guide pin 34 meets the following conditions: it is slidably connected to the fixed seat 31, one end is slidably connected in the spiral groove 35, and the axis is in the same plane as the axis of the rotating wheel 32 and is perpendicular to each other. According to the Archimedean spiral principle, when the rotating wheel 32 rotates a certain angle, the displacement distance of the guide pin 34 and the rotation angle of the rotating wheel 32 will be in a fixed ratio according to the parameters of the Archimedean spiral in which the spiral groove 35 is located. Therefore, the rotation angle of the rotating wheel 32 can be converted by measuring the displacement distance of the guide pin 34 using a digital dial indicator. This angle is also the angle at which the workpiece is rolled by the rolling bending unit 2 fixedly connected to the rotating wheel 32. The structure is ingenious, and there is no need to use a specific machine to measure the angle each time the angle is adjusted, which greatly improves work efficiency and has high measurement accuracy, ensuring accurate adjustment. The precision of the sections is improved, which effectively improves the product quality. In this embodiment, the parameters of the Archimedean spiral where the spiral groove 35 is located are preferably set to a starting diameter of 0, an ending diameter of 720 mm, a starting and ending pitch of 0, and a number of turns of 1. The polar coordinate equation of the Archimedean spiral is ρ=a*θ, where a=v / ω=1, and a digital dial indicator is used to measure the displacement distance of the guide pin 34. Under this parameter, a 1mm displacement distance measured by the digital dial indicator indicates that the rotating wheel 32 rotates 1°. No additional conversion is required, the measurement is more convenient, and the efficiency is further improved.

[0021] The rotating wheel 32 is a turbine, and a worm 36 is rotatably connected to the fixed seat 31 and meshes with the rotating wheel 32. In this embodiment, the turbine worm transmission is used, and the worm can be rotated when adjustment is required, which is convenient for adjustment. The worm lead angle is designed to be smaller than the friction angle, so that the two have self-locking properties to prevent self-rotation and ensure stable operation of the device.

[0022] A through hole is provided in the middle of the rotating wheel 32 for a workpiece to pass through.

[0023] Each of the rolling units 2 clamps a skylight guide rail 4, which is a sheet. The cross-section of the skylight guide rail 4 is a square tube 41 with an open end. A first step portion 42 and a second step portion 43 extend outward on one side of the opening of the square tube groove 411, and a bending portion 44 extends inward on the other side.

[0024] Each rolling bracket 21 is evenly provided with a first roller 22, a second roller 23, a third roller 24 and a fourth roller 25 along the circumferential direction; the middle part of the first roller 22 is provided with a first annular protrusion 221 extending into the square tube groove 411 and abutting against the bottom wall of the square tube groove 411, and the outer peripheral walls of the second roller 23, the third roller 24 and the fourth roller 25 are respectively abutted against the three side walls of the square tube 41, and the first roller 22 presses the second step portion 43 against the end face of the fourth roller 25 through the second annular protrusion 222 provided on one side, and the first roller 22 abuts against the first step portion 42 and the bending portion 44; the state of the first roller 22, the second roller 23, the third roller 24 and the fourth roller 25 clamping the sunroof guide rail 4 is as shown in FIG. Figure 6 As shown, the outer peripheral wall of the first annular protrusion 221 and the third roller 24 cooperate to press the bottom wall of the square tube groove 411, and the side surface of the first annular protrusion 221 and the outer peripheral wall of the fourth roller 25 cooperate to press one side wall of the square tube groove 411. By clamping the various parts of the sunroof guide rail 4 with four rollers evenly arranged along the circumferential direction, the force is evenly applied, which effectively prevents distortion and breakage, and has a good rolling and bending effect.

[0025] The digital display distance measuring instrument 37 is a digital display dial indicator.

[0026] The above description is only based on the preferred embodiments of the present invention, and should not be construed as limiting the claims. The structure of the present invention may have other variations and is not limited to the above structure. In short, all variations made within the scope of protection of the independent claims of the present invention are also within the scope of protection of the present invention.

Claims

1. A rolling tool for measuring angle based on Archimedean spiral, characterized in that: The invention comprises a base (1), a plurality of rolling units (2) and a rotation correction unit (3); each rolling unit (2) comprises a rolling bracket (21); the rotation correction unit (3) comprises a fixed seat (31), a rotating wheel (32), a measuring block (33) and a guide pin (34); the fixed seat (31) is fixedly connected to the base (1), and the rotating wheel (32) is rotationally connected to the fixed seat (31); The rotating wheel (32) is a turbine, and a worm (36) meshing with the rotating wheel (32) is rotatably connected to the fixed seat (31); The measuring block (33) is fixedly connected to the rotating wheel (32), and a spiral groove (35) is provided on the measuring block (33), wherein the path of the spiral groove (35) coincides with an Archimedean spiral whose starting point coincides with the rotation axis of the rotating wheel (32); The rotating wheel (32) is also fixedly connected to a rolling bracket (21), and the rotating wheel (32) is used to drive the rolling unit (2) fixedly connected thereto to rotate a certain angle; The guide pin (34) is slidably connected to the fixed seat (31), one end of the guide pin (34) is slidably connected to the spiral groove (35), and the axis of the guide pin (34) and the axis of the rotating wheel (32) are in the same plane and perpendicular to each other; The fixing seat (31) is also detachably connected to a digital distance meter (37), and the front end of the measuring rod of the digital distance meter (37) is against one end of the guide pin (34).

2. The rolling tool for measuring the angle based on the Archimedean spiral according to claim 1, characterized in that: A through hole is provided in the middle of the rotating wheel (32) for a workpiece to pass through.

3. The rolling tool for measuring the angle based on the Archimedean spiral according to claim 1, characterized in that: Each rolling unit (2) clamps a skylight guide rail (4), wherein the skylight guide rail (4) is a sheet body, and the cross section of the skylight guide rail (4) is a square tube (41) with an open end. A first step portion (42) and a second step portion (43) are extended outward on one side of the opening of the square tube groove (411), and a bending portion (44) is extended inward on the other side.

4. The rolling tool for measuring the angle based on the Archimedean spiral according to claim 3, characterized in that: Each rolling bracket (21) is evenly provided with a first roller (22), a second roller (23), a third roller (24) and a fourth roller (25) along the circumferential direction; a first annular protrusion (221) is provided in the middle of the first roller (22) and extends into the square tube groove (411) and abuts against the bottom wall of the square tube groove (411); the outer peripheral walls of the second roller (23), the third roller (24) and the fourth roller (25) respectively abut against the three side walls of the square tube (41); and the first roller (22) presses the second step portion (43) against the end face of the fourth roller (25) through the second annular protrusion (222) provided on one side, and the first roller (22) abuts against the first step portion (42) and the bending portion (44).

5. The rolling bending tool for measuring the angle based on the Archimedean spiral according to claim 1, characterized in that: The digital display distance measuring instrument (37) is a digital display dial indicator.

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