Variable-r-angle chamfering device for plate processing

Abstract

The application provides a variable R-angle chamfering device for plate processing, and relates to the technical field of plate processing. The variable R-angle chamfering device for plate processing adjusts the distance between the center line of a cutter body and the rotation center line of the cutter body through the relative sliding of the driving cone and the driven cone, so as to adjust the chamfering radius after processing. When chamfering of different radii is processed, the cutter body or cutter need not be replaced, the input cost of various cutters is saved, the process of tool changing and tool setting in the chamfering process is omitted, the processing efficiency is improved, the device uses a photoelectric probe to find the arc center position of the R-angle corner to be chamfered, solves the problems of inaccurate positioning of a traditional handheld chamfering device and the influence of uneven scrap removal speed on chamfering, improves the processing precision, and continuously maintains the relative displacement between the driving cone and the driven cone during the cutting process, so that the radius between the chamfered arc and the chamfer center can continuously change, and the processing of the round corner with continuously changing chamfering radius can be completed.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing technology, specifically to a variable radius chamfering device for sheet metal processing. Background Technology

[0002] Boards are typically made from materials such as wood, metal, and glass. During processing, the corners of these boards need to be chamfered, usually using either a handheld chamfering machine or a benchtop chamfering machine. Handheld chamfering machines are prone to problems; inaccurate positioning and uneven chip removal speeds can affect processing accuracy and require highly skilled operators. In contrast, benchtop chamfering machines typically use fixed-size cutters and can only chamfer corners with the same radius (R) size. If multiple corners on the same board require different R sizes, the corresponding chamfering cutters must be changed, increasing tool costs and processing costs. Furthermore, the angles of the adjacent edges of corners vary across different boards, requiring different chamfering methods, which in turn affects processing efficiency and accuracy. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] This invention provides a variable radius chamfering device for sheet metal processing. To solve the above-mentioned technical problems, it can adapt to chamfering of various radius radius angles without changing the cutting tool, thereby improving processing efficiency and reducing the cost of cutting tool replacement.

[0005] (II) Technical Solution

[0006] This invention provides a variable radius chamfering device for sheet metal processing, comprising a base frame, a platform, and a chamfering mechanism. The platform is slidably mounted on the upper end of the base frame, and the chamfering mechanism is movably mounted on the upper side of the platform. The chamfering mechanism includes a tool feed mechanism, which comprises a tool motor. A support column is fixedly mounted on the upper end of the tool motor, and a steering housing is rotatably mounted on the lower side of the tool motor. A corner motor is fixedly mounted on the side end of the tool motor, and a steering head is fixedly connected to the upper surface of the steering housing. A steering gear ring coaxial with the tool motor is provided on the outer side of the steering head. A rotary gear is fixedly connected to the output shaft of the machine. The steering gear meshes with the rotary gear. The output shaft of the tool motor passes through the steering head to the inside of the steering housing and is coaxially connected to the active cone. A tool body shell is slidably disposed on the side end of the steering housing. A driven cone is rotatably disposed inside the tool body shell. The driven cone is parallel to the axis of the active cone and its outer surface is always in contact. The steering housing and the tool body shell are adapted to slide relative to each other along the contact surface direction. A photoelectric probe is fixedly disposed at the lower end face of the steering housing opposite to the axis of the active cone. The lower end of the driven cone passes through the lower end of the tool body shell and is fixedly connected to the tool body.

[0007] Preferably, the chamfering mechanism includes a support frame, a transverse slide rod is fixedly arranged on the upper side inside the support frame, a transverse slider is slidably arranged on the outer side of the transverse slide rod, a plurality of vertical slide rails are fixedly arranged on the front end face of the transverse slider, a vertical slider is slidably arranged on the outer side of the vertical slide rails, and a connector is fixedly arranged on the front end face of the vertical slider, the connector being fixedly connected to the support column of the feed mechanism.

[0008] (III) Beneficial Effects

[0009] (1) This invention provides a variable R-angle chamfering device for sheet metal processing. By moving the stage and the horizontal slider, the central axis of the tool motor, i.e., the rotation center line of the tool body, is aligned with the chamfering center of the workpiece corner. The relative movement between the variable angle slider and the variable angle slide rail is used to adjust the distance between the tool body center line and the tool body rotation center line, thereby adjusting the chamfer radius after processing. The vertical movement of the vertical slider is used to adjust the vertical distance between the tool body and the workpiece to achieve tool advance and retraction. The transmission relationship between the tool motor, the driving cone and the driven cone is used to realize the rotational movement of the tool body around its own central axis, thereby realizing the cutting action of the rotating tool body on the workpiece. During the cutting process, the angle motor, the angle gear, and the steering gear ring drive the steering housing and the tool body housing to rotate around the central axis of the tool motor, thereby realizing the rotation of the tool body around the central axis of the tool motor (i.e., the perpendicular line passing through the chamfering center of the workpiece corner), so that the tool moves along the set arc trajectory and cuts the chamfer at the corner of the workpiece to obtain the required radius of chamfer.

[0010] (2) When machining chamfers of different radii, there is no need to change the tool body or tool. Only the relative displacement between the variable angle slider and the variable angle slide rail needs to be adjusted, which saves the investment cost of various tools, eliminates the tool changing process and the tool re-setting (or tool positioning calibration) process after tool changing during the chamfering process, and improves the machining efficiency.

[0011] (3) The photoelectric probe is used to find the center of the arc of the corner to be chamfered, which solves the problem of inaccurate positioning and uneven chip removal speed of traditional handheld chamfering equipment, thus improving the processing accuracy.

[0012] (4) For the workpiece chamfer is a rounded corner with a continuously changing radius (i.e., the radius of the chamfer arc is not constant), during the above-mentioned cutting process of the cutter head, the relative displacement between the variable angle slider and the variable angle slide rail is continuously adjusted to realize the continuous adjustment of the distance between the central axis of the cutter head and the central axis of the cutter motor, thereby realizing the continuous adjustment of the distance between the central axis of the cutter body and the vertical line passing through the center of the chamfer circle, that is, realizing the continuous change of the radius between the arc after chamfering and the center of the chamfer circle, and completing the chamfering process of the variable radius arc R angle. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0014] Figure 1 This is a perspective view of a variable radius chamfering device for sheet metal processing according to the present invention;

[0015] Figure 2 This is a partial enlarged view of the stage A according to the present invention;

[0016] Figure 3 This is a schematic diagram of the feed mechanism according to the present invention;

[0017] Figure 4 This is a cross-sectional schematic diagram of the feed mechanism according to the present invention;

[0018] The reference numerals in the attached figures are explained as follows:

[0019] Base frame 1: slide rail 11, lead screw 12, lead screw motor 13, base 14, limit block 15;

[0020] Stage 2: Vacuum suction cup 21, chip removal hole 22;

[0021] Chamfering mechanism 3: support frame 31, horizontal slide bar 32, horizontal slider 33, vertical slide rail 34, vertical slider 35, connector 36, limit groove 37, feed mechanism 4, tool body 40, support column 41, tool motor 42, angle motor 43, angle gear 431, steering head 44, steering gear ring 441, steering shell 45, active cone 451, drive bearing 452, photoelectric probe 46, variable angle slider 47, variable angle slide rail 48, tool body shell 49, driven cone 491, tool body bearing 492. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] refer to Figure 1This is a perspective view of a variable R-angle chamfering device for sheet metal processing according to this embodiment. It includes a base frame 1, slide rails 11, a lead screw 12, a lead screw motor 13, a base 14, a limiting block 15, a platform 2, a chamfering mechanism 3, a support frame 31, a horizontal slide bar 32, a horizontal slider 33, a vertical slide rail 34, a vertical slider 35, a connector 36, a limiting groove 37, and a feed mechanism 4. Two slide rails 11 are fixedly installed on the base 14 of the base frame 1. The platform 2 is slidably connected to the slide rails 11. One side of the platform 2 is threadedly connected to the lead screw 12. One end of the lead screw 12 is coaxially connected to the rotor of the lead screw motor 13 via a coupling. The other end of the lead screw 12 is connected to the limiting block 15 via a bearing. The base 14... A support frame 31 with a chamfering mechanism 3 is fixedly installed on both sides of the middle section. A horizontal slide bar 32, which is horizontal and perpendicular to the slide rail 11, is installed between a pair of vertical beams of the support frame 31. A horizontal slider 33 is slidably connected to the horizontal slide bar 32. A limiting groove 37 parallel to the horizontal slide bar 32 is provided on the top crossbeam of the support frame 31. The upper end of the horizontal slider 33 is slidably engaged with the limiting groove 37. Multiple parallel vertical slide rails 34 are equidistantly arranged on one side of the horizontal slider 33. A vertical slider 35 is slidably engaged with each of the vertical slide rails 34. A connector 36 is fixedly connected to the middle side wall of the vertical slider 35. A vertical through hole is provided on the connector 36. A feed mechanism 4 is fixedly installed in the through hole.

[0024] When the lead screw motor 13 rotates clockwise, it drives the lead screw 12 to move in tandem. As the lead screw 12 rotates, the platform 2 moves along the axis of the lead screw 12 towards the limiting block 15 on the slide rail 11. When the lead screw motor 13 rotates counterclockwise, it drives the lead screw 12 to move in tandem. As the lead screw 12 rotates, the platform 2 moves along the axis of the lead screw 12 towards the motor 13 on the slide rail 11. This allows the plate placed on the platform 2 to be translated in this direction.

[0025] The transverse slider 33 is constrained by the limiting groove 37 and can only translate along the axial direction of the transverse slide bar 32 without flipping. The transverse slide bar 32 is provided with the permanent magnet primary of the linear motor in the prior art, and the transverse slider 33 is provided with the secondary of the linear motor. When the secondary of the linear motor in the transverse slider 33 is energized in the forward direction, a magnetic flux is generated in the secondary coil. According to Lenz's law, eddy currents are induced in the transverse slider 33, which drives the transverse slider 33 to move to the right on the transverse slide bar 32. When the linear motor is energized in the reverse direction, it can drive the transverse slider 33 to move to the left on the transverse slide bar 32.

[0026] The vertical slider 35 contains the secondary winding of a linear motor, as is the case in the prior art, while the vertical slide rail 34 contains the permanent magnet primary winding of a linear motor. When the secondary winding of the linear motor in the vertical slider 35 is energized in the forward direction, a magnetic flux is generated in the secondary coil. According to Lenz's law, eddy currents are induced in the vertical slider 35, driving the vertical slider 35 to move downward along the vertical slide rail 34. When the linear motor is energized in the reverse direction, the vertical slider 35 moves upward along the vertical slide rail 34, and the feed mechanism 4 moves synchronously with the vertical slider 35.

[0027] refer to Figure 2 This is a partial enlarged view of stage A in this embodiment. The upper surface of stage 2 is evenly provided with a number of chip removal holes 22 at equal intervals. A set of vacuum suction cups 21 is provided at the center of the diagonal of every four adjacent chip removal holes 22. Each set of vacuum suction cups 21 is arranged in a cross shape. The suction cups are equipped with sealing rings. After placement, the bottom surface of the plate is fixed to the upper surface of stage 2 by the adsorption force of the vacuum suction cups 21 and maintains a certain gap with the surface. The corners of the plate are located exactly above the chip removal holes 22. During the processing, the waste generated by the cutting tool falls into the chip removal holes 22, thus not affecting the tool positioning and processing process.

[0028] refer to Figure 3 and Figure 4The diagram shows a schematic and cross-sectional view of the feed mechanism in this embodiment. The feed mechanism 4 includes a cutter body 40, a support column 41, a cutter motor 42, a rotary motor 43, a rotary gear 431, a steering head 44, a steering gear ring 441, a steering housing 45, an active cone 451, a drive bearing 452, a photoelectric probe 46, a variable angle slider 47, a variable angle slide rail 48, a cutter body housing 49, a driven cone 491, and a cutter body bearing 492. One end of the support column 41 is fixedly connected to a through hole in the connector 36. The other end of the support column 41... A tool motor 42 is axially mounted at one end. A bearing is fitted onto the outer side of the rotor extension end of the tool motor 42 via an interference fit, preventing the bearing from disengaging from the rotor extension end. A steering head 44 is connected to the outer side of the bearing, and the steering head 44 rotates with the rotor via the bearing. The lower end of the steering head 44 is connected to the upper end of the steering housing 45. The steering head 44 cannot slide axially relative to the rotor of the tool motor 42. A steering gear ring 441 is coaxially mounted on the outer circumferential wall of the steering head 44. The steering gear ring 441 meshes with an adjacent angle gear 431 on one side. The angle gear 431 is coaxially positioned at the rotor extension end of the angle motor 43. The angle motor 43 is mounted on the housing of the tool motor 42. A variable angle slider 47 is mounted on one side of the steering housing 45. The variable angle slider 47 is slidably connected to a variable angle slide rail 48, which is fixedly positioned on one side of the tool body housing 49. This converts the relative sliding of the variable angle slider 47 relative to the variable angle slide rail 48 into relative sliding between the steering housing 45 and the tool body housing 49, and also enables steering... The active cone 451 is housed within the housing 45. The upper end of the active cone 451 extends out of the steering housing 45 and is connected to the rotor of the tool motor 42 along the same central axis. The lower end of the active cone 451 is rotatably fitted within the steering housing 45 via a drive bearing 452. A driven cone 491 is rotatably fitted within the tool body housing 49. The conical surfaces of the active cone 451 and the driven cone 491 are in close contact with each other and have a set frictional force. Their contact line is parallel to the relative sliding direction between the variable angle slider 47 and the variable angle slide rail 48. The active cone 451 and the driven cone 491 can both drive each other to rotate around their respective central axes and slide relative to each other along the contact line. One end of the driven cone 491 is connected to the tool body housing 49 by a tool body bearing 492. The other end of the driven cone 491 extends out of the tool body housing 49, and a tool body 40 is mounted at its end. The tool body 40 and the driven cone 491 share a common central axis of symmetry. The steering head 44, the steering gear ring 441, the rotor of the tool motor 42, and the active cone 451 share the same central axis.

[0029] As a preferred embodiment, the bearing inside the steering head 44 is sleeved on the outer side of the lower end of the tool motor 42 housing, and the rotor of the tool motor 42 extends from the lower end and is connected to the active cone 451 below it along the same central axis, thereby reducing the load on the rotor of the tool motor 42.

[0030] The tool motor 42 drives the active cone 451 to rotate. The side of the active cone 451 transmits torque to the driven cone 491 through friction. The driven cone 491 then transmits torque to the tool body 40, which then has cutting power.

[0031] The angle motor 43 rotates in the set direction, and the angle gear 431 drives the steering gear ring 441 to rotate. The steering gear ring 441 drives the steering shell 45 and the cutter body shell 49 to rotate in the same direction, so the cutter body 40 has a steering angular velocity.

[0032] A motor is installed inside the variable angle slider 47, and a gear is provided at the outer end of the motor rotor. A rack is provided on one side of the variable angle slide rail 48, and the gear meshes with the rack. When the motor rotates clockwise, the variable angle slide rail 48 moves downward relative to the tool motor 42, that is, the tool body shell 49 moves downward relative to the steering shell 45. At this time, the contact area between the driving cone 451 and the driven cone 491 decreases, realizing the parallel and closer alignment of the central axis of the tool body 40 with the central axis of the tool motor 42. Conversely, when the motor rotates counterclockwise, the variable angle slide rail 48 moves upward relative to the tool motor 42, that is, the tool body shell 49 moves upward relative to the steering shell 45. At this time, the contact area between the driving cone 451 and the driven cone 491 increases, realizing the parallel and farther alignment of the central axis of the tool body 40 with the central axis of the tool motor 42.

[0033] A photoelectric probe 46 is provided on the outer wall of the steering housing 45, directly opposite the center of the active cone 451, facing the stage 2.

[0034] Working principle: According to Figures 1 to 4 .

[0035] ① First, place the board on the upper surface of the stage 2, adjust the position of the board to be processed, and place the corner of each corner to be chamfered above the corresponding chip removal hole 22 on the stage 2. Start the vacuum suction cup 21 to fix the board on the stage 2 by suction.

[0036] ② Start the lead screw motor 13, and the lead screw 12 drives the platform 2 to move along the slide rail 11, moving the corner of the plate to be chamfered below the horizontal slide bar 32.

[0037] ③Activate the horizontal slider 33 to move the feed mechanism 4 to the corner above the corner to be chamfered.

[0038] ④ Start the photoelectric probe 46 to find the chamfer center of the corner of the workpiece to be chamfered, start the lead screw motor 13, the lead screw 12 drives the platform 2 to move along the slide rail 11, and at the same time the linear motor drives the horizontal slider 33 to move along the horizontal slide bar 32 with the feed mechanism 4 until the photoelectric probe 46 is directly above the chamfer center of the corner of the workpiece to be chamfered, then stop the lead screw motor 13 and the linear motor.

[0039] ⑤ Start the motor inside the variable angle slider 47 to make the cutter body shell 49 slide relative to the steering shell 45, and adjust the distance between the central axis of the cutter body 40 and the central axis of the motor rotor 42 until the distance reaches the set value.

[0040] ⑥ Use a linear motor to drive the vertical slider 35 to move downward along the vertical slide rail 34, and the cutter body 40 moves downward synchronously until the cutter body 40 contacts the workpiece. At this time, the cutter body 40 is located at the cutting start position on the corner side of the workpiece to be chamfered.

[0041] ⑦ Start the tool motor 42. The tool motor 42 transmits the corresponding speed and torque to the tool body 40 through the driving cone 451 and the driven cone 491, causing the tool body 40 to rotate around its own central axis to cut the workpiece. At the same time, start the corner motor 43, driving the steering housing 45 to rotate around the central axis of the rotor of the tool motor 42 to feed the tool body 40. This causes the tool body 40 to perform circular motion around the central axis of the rotor of the tool motor 42 (i.e., the axis that passes perpendicularly through the chamfering center) to perform chamfering operations on the corner of the workpiece. The chamfering process continues until it is finished. Then, stop the corner motor 43 and the tool motor 42, and move the vertical slider 35 upward along the vertical slide rail 34 to the set height so that the tool body 40 can detach from the workpiece.

[0042] If chamfers of different radii are required, simply readjust the distance between the central axis of the cutter body 40 and the central axis of the motor rotor 42 in step ⑤.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable radius chamfering device for sheet metal processing, comprising a base frame (1), a worktable (2), and a chamfering mechanism (3), characterized in that: The platform (2) is slidably mounted on the upper end of the base frame (1). The chamfering mechanism (3) is movably mounted on the upper side of the platform (2). The chamfering mechanism (3) is equipped with a tool feeding mechanism (4). The tool feeding mechanism (4) includes a tool motor (42). A support column (41) is fixedly mounted on the upper end of the tool motor (42). A steering housing (45) is rotatably mounted on the lower side of the tool motor (42). A corner motor (43) is fixedly mounted on the side end of the tool motor (42). A steering head (44) is fixedly connected to the upper end face of the steering housing (45). A steering gear ring (441) coaxial with the tool motor (42) is provided on the outer side of the steering head (44). A corner gear (431) is fixedly connected to the output shaft of the corner motor (43). The steering gear ring (441) is... 1) Engages with the angle gear (431), the output shaft of the tool motor (42) passes through the steering head (44) to the inside of the steering housing (45) and is coaxially connected to the active cone (451); the side end of the steering housing (45) is slidably provided with a tool body shell (49), the inside of the tool body shell (49) is rotatably provided with a driven cone (491), the driven cone (491) is parallel to the axis of the active cone (451) and the outer surface is always in contact, the steering housing (45) and the tool body shell (49) are adapted to slide relative to each other along the contact surface direction, the lower end face of the steering housing (45) is fixedly provided with a photoelectric probe (46) at the position opposite to the axis of the active cone (451), the lower end of the driven cone (491) passes through the lower end of the tool body shell (49) and is fixedly connected to the tool body (40).

2. The variable R-angle chamfering device for sheet metal processing according to claim 1, characterized in that: The chamfering mechanism (3) includes a support frame (31). A transverse slide rod (32) is fixedly installed on the upper side inside the support frame (31). A transverse slider (33) is slidably installed on the outer side of the transverse slide rod (32). A plurality of vertical slide rails (34) are fixedly installed on the front end face of the transverse slider (33). A vertical slider (35) is slidably installed on the outer side of the vertical slide rails (34). A connector (36) is fixedly installed on the front end face of the vertical slider (35). The connector (36) is fixedly connected to the support column (41) of the feed mechanism (4).

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