Low voltage wiring harness terminal edge treatment apparatus and method

Abstract

The application discloses a low-voltage wire harness terminal edge processing device and method, which comprises a fixed disc, a first motor is fixedly installed at the center of the top of the fixed disc, the outer wall of the rotating shaft of the first motor is fixedly penetrated by a first rotating disc and a second rotating disc, a gear disc is fixedly installed between the fixed disc and the first rotating disc, a plurality of clamping mechanisms arranged in an annular array are installed on the first rotating disc, and the plurality of clamping mechanisms are in meshing transmission with the gear disc; a plurality of sanding drums arranged in an annular array are installed on the second rotating disc and located directly below the clamping mechanisms; a plurality of balls arranged in an annular array are rollingly embedded in the bottom of the fixed disc, the top of the clamping mechanism is in spaced rolling connection with the outer wall of the plurality of balls, and the bottom end of the clamping mechanism is driven to reciprocatingly lift and fall; and a circumferential sanding structure is further arranged in the clamping mechanism. The application relates to the technical field of polishing. The application solves the problem that the traditional metal terminal polishing is difficult to fully polish the terminal edge.

Description

Technical Field

[0001] This invention relates to the field of polishing technology, and in particular to a device and method for edge treatment of low-voltage wire harness terminals. Background Technology

[0002] Low-voltage wire harness terminals are widely used in automobiles, home appliances, industrial control, and new energy equipment, and are key components for ensuring stable electrical connections. Terminals are mostly sheet-like or irregularly shaped, with gaps and corners often present at their edges, such as the inside of bends and around openings. Burrs can easily remain in these areas during production. If not thoroughly polished, these burrs will affect the assembly accuracy and long-term reliability of the wire harness. Therefore, the industry's need for polishing of terminal edge gaps and corners is becoming increasingly urgent.

[0003] While terminal edge grinding technology has undergone several generations of development, significant shortcomings remain in handling gaps and corners. Early manual grinding relied on handheld tools, making it difficult to reach narrow corner spaces, resulting in either missed or over-grinding, and poor quality consistency. Subsequent mechanical rigid grinding, such as grinding with grinding wheels and milling cutters, while automated, suffers from fixed-shape grinding components that cannot conform to the complex curves of corners, creating contact blind spots and potentially damaging terminals due to hard contact. Traditional dielectric-assisted grinding, such as sandblasting and sand tumbling, utilizes the fluidity of the medium to adapt to corners, but the relative movement between the terminal and the medium is singular, often involving unidirectional impact or random tumbling, making it difficult for the medium to continuously and stably act on the depths of the corner, leading to insufficient grinding.

[0004] As terminal equipment upgrades towards higher precision and reliability, the requirements for terminal edge quality are becoming increasingly stringent. Burr residue at gaps and corners has become a key bottleneck restricting product qualification. Existing technologies cannot achieve "sufficient and continuous contact between the grinding medium and the terminal corners," making it difficult to meet the industry's demand for uniform grinding across the entire terminal edge. Therefore, we propose a low-voltage wire harness terminal edge treatment device and method. Summary of the Invention

[0005] To address the problem that traditional metal terminal grinding methods struggle to thoroughly grind the entire edge of the terminal, the present invention aims to provide a low-voltage wire harness terminal edge processing device and method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a low-voltage wire harness terminal edge processing device, comprising a fixed disk, a first motor fixedly installed at the center of the top of the fixed disk, a rotating shaft vertically downward connected to the output end of the first motor, a first turntable and a second turntable fixedly connected to the outer wall of the rotating shaft, a gear disk fixedly installed between the fixed disk and the first turntable, a plurality of clamping mechanisms arranged in a circular array installed on the first turntable, the plurality of clamping mechanisms being meshed with the gear disk; a plurality of sand cylinders arranged in a circular array installed on the second turntable, the height of the sand cylinders being adjustable and located directly below the clamping mechanisms; a plurality of balls arranged in a circular array are rolledly embedded in the bottom of the fixed disk, the top of the clamping mechanism being intermittently rolledly connected to the outer wall of the plurality of balls, for driving the bottom end of the clamping mechanism to reciprocate up and down; a circumferential sand-spreading structure is also provided in the clamping mechanism.

[0007] Preferably, a connecting pipe is fixedly installed at the center of the bottom of the fixed disk, the inner wall of the gear disk is fixedly sleeved on the outer wall of the connecting pipe, and the rotating shaft moves through the center of the connecting pipe.

[0008] Preferably, the clamping mechanism includes a sleeve fixedly connected to the first turntable, a rotating cylinder rotatably sleeved on the inner wall of the sleeve near the top port, a first annular stop fixedly sleeved on the inner wall below the rotating cylinder, and a second annular stop fixedly sleeved on the inner wall near the bottom port; a gear meshing with a gear disk is fixedly connected to the top of the rotating cylinder, an external hexagonal prism is vertically slidably connected to the center of the gear, an arc-shaped head is fixedly connected to the top of the external hexagonal prism, and the outer wall of the arc-shaped head is in rolling connection with the outer wall of the ball; the first annular stop and the second annular stop... A circular tube is vertically and rotatably connected to the center of the annular stop. The top of the circular tube is fixedly connected to the bottom of the outer hexagonal prism. A baffle is fixedly sleeved on the outer wall of the circular tube below the first annular stop. The top surface of the baffle is in contact with the bottom of the first annular stop. A first spring is sleeved on the outer wall of the circular tube. The two ends of the first spring are respectively pressed against the bottom surface of the baffle and the top surface of the second annular stop. The bottom of the circular tube is tapered, and an electric gripper is fixedly installed at the bottom of the tapered end. The top surface of the first annular stop is a concave flared opening.

[0009] Preferably, an electric push rod is fixedly installed at the bottom of the sand cylinder. The telescopic end of the electric push rod moves vertically upward through the bottom of the sand cylinder, and a pressure sensor is fixedly installed at the top of the telescopic end. A rectangular plate is fixedly installed at the monitoring end of the pressure sensor. A guide rod is fixedly connected to the top surface of the rectangular plate. A U-shaped frame with an upward-facing opening is slidably connected to the outer wall of the guide rod, and a limiting plate that abuts against the bottom surface of the U-shaped frame is fixedly connected to its top. A second spring is sleeved on the outer wall of the guide rod, and the two ends of the second spring abut against the bottom of the U-shaped frame and the top surface of the rectangular plate, respectively. A support plate that slides against the inner wall of the sand cylinder is fixedly connected to the top of the U-shaped frame. A cylinder is fixedly installed at the bottom of the second turntable. The telescopic end of the cylinder moves vertically upward through the top surface of the second turntable, and a U-shaped plate is fixedly connected to the top of the telescopic end. A second motor is fixedly installed on the side wall of the U-shaped plate. The two side walls of the electric push rod are rotatably installed inside the U-shaped plate through a connecting shaft. The output end of the second motor is shaft-connected to the connecting shaft on one side of the electric push rod. A vibration motor is installed at the bottom of the support plate.

[0010] Preferably, the circumferential sand distribution structure includes a connecting interface, strip-shaped openings, and sand distribution openings. The connecting interface is located on the outer wall between the rotating drum and the first annular stop block, and is used to connect to the supply port of the sand supply equipment. Several strip-shaped openings are arranged in a vertical annular array on the outer wall of the sand cylinder above the first annular stop block. Several sand distribution openings are arranged in an annular array on the conical surface of the bottom conical end of the circular tube. The circumferential sand distribution structure also includes a third motor fixedly installed on the top of the circular tube. The bottom of the outer hexagonal column has an installation groove, and the third motor is located in the installation groove. The output end of the third motor is shaft-connected to a rotating rod located inside the circular tube. The outer wall of the rotating rod is fixedly sleeved with auger blades, and its bottom is fixedly connected to a conical block. The conical surface of the conical block is slidably connected to the conical surface inside the bottom conical end of the circular tube, and several guide grooves arranged in an annular array are opened on the conical surface of the conical block.

[0011] A method for edge treatment of low-voltage wire harness terminals includes the following steps: S1, the clamping end of the clamping mechanism clamps the metal terminal and lifts the sand cylinder; S2, The circumferential sanding structure spreads sand around the metal terminal to fill the metal terminal; S3, the first motor drives the first turntable and the second turntable to rotate synchronously through the rotating shaft. Under the meshing transmission action of the clamping mechanism and the gear disk, the clamping mechanism rotates, and the metal terminal buried in the sand of the sand cylinder rotates. At the same time, the top of the clamping mechanism is intermittently connected to the outer wall of several balls, driving the bottom of the clamping mechanism to move up and down repeatedly, so that the metal terminal buried in the sand in the sand cylinder moves up and down repeatedly. The metal terminal rotates and moves up and down repeatedly in the sand, polishing the edges of the metal terminal with the sand. S4, the first motor drives the first turntable and the second turntable to rotate alternately in a forward and reverse manner via a rotating shaft.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: This invention achieves a spiral grinding trajectory for the terminal by rotating the metal terminal piece held by the clamping mechanism in the sand while reciprocating up and down, which can fully grind every gap and corner at the edge of the metal terminal piece.

[0013] This invention involves inserting a metal terminal piece into a sand cylinder, and then using a circumferential sand-laying structure to spread sand around the metal terminal piece to fill it, ensuring that the metal terminal piece is fully buried.

[0014] This invention, through the elastic support of the support plate, allows the metal terminal piece to rotate and reciprocate smoothly in the sand, preventing the sand from getting stuck due to compression.

[0015] This invention, by incorporating a vibration motor, enables rapid and dense sanding during the grinding process, ensuring a consistently dense and consistent coating of the metal terminal piece and guaranteeing the grinding effect at the edges of the metal terminal piece.

[0016] This invention uses a pressure sensor to monitor pressure changes in real time and then uses an electric push rod to adjust the pressure in real time, ensuring constant pressure during the grinding process and further guaranteeing the grinding effect at the edge of the metal terminal piece. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the ball bearing of the present invention; Figure 3 This is a cross-sectional structural schematic diagram of the clamping mechanism of the present invention; Figure 4 This is a schematic diagram of the circumferential sanding structure of the present invention; Figure 5 This is a schematic diagram of the cone-shaped block of the present invention viewed from below; Figure 6 This is a three-dimensional structural diagram of the sand cylinder of the present invention; Figure 7 This is a cross-sectional structural schematic diagram of the sand cylinder of the present invention.

[0018] In the diagram: 1. Fixed disk; 2. First motor; 3. Rotating shaft; 4. First turntable; 5. Second turntable; 6. Gear disk; 7. Clamping mechanism; 701. Sleeve; 702. Rotating cylinder; 703. First annular stop; 704. Second annular stop; 705. Gear; 706. External hexagonal prism; 707. Arc-shaped head; 708. Circular tube; 709. Baffle; 710. First spring; 711. Electric gripper; 8. Sand cylinder; 801. Electric push rod; 802. Pressure sensor; 803. Rectangular... 804. Guide rod; 805. U-shaped frame; 806. Limiting plate; 807. Second spring; 808. Support plate; 809. Cylinder; 810. U-shaped plate; 811. Second motor; 812. Vibration motor; 9. Ball bearing; 10. Circumferential sanding structure; 1001. Connecting interface; 1002. Strip opening; 1003. Sanding opening; 1004. Third motor; 1005. Rotating rod; 1006. Screwdriver blade; 1007. Conical block; 1008. Guide chute; 11. Connecting pipe. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0020] Please see Figures 1 to 7 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0021] The present invention provides a technical solution: a low-voltage wire harness terminal edge processing device, which is composed of a fixed plate 1, a first motor 2, a rotating shaft 3, a first turntable 4, a second turntable 5, a gear plate 6, a clamping mechanism 7, a sand cylinder 8, a ball bearing 9, and a circumferential sand distribution structure 10.

[0022] The device is supported by a fixed disk 1. The first motor 2 drives the rotating shaft 3 to drive the first turntable 4 and the second turntable 5 to rotate synchronously. The clamping mechanism 7 on the first turntable 4 meshes with the fixed gear disk 6 to achieve rotation. At the same time, the clamping mechanism 7 is driven to reciprocate and rise with the help of the ball bearing 9. The sand cylinder 8 on the second turntable 5 corresponds one-to-one with the clamping mechanism 7. The circumferential sand distribution structure 10 ensures that the sand evenly covers the terminal. All components work together to complete the entire process of terminal grinding.

[0023] The device's supporting components, such as the fixed plate 1 and the rotating shaft 3, are made of high-strength metal materials. The moving parts, such as the rotating cylinder 702 and the circular tube 708, are made of wear-resistant materials. The electrical components, such as the first motor 2 and the electric gripper 711, are industrial-grade products to ensure long-term stable operation.

[0024] The fixed plate 1 is a circular flat plate with mounting holes on its edge for fixing devices. It can be stably installed on the workbench or frame with fasteners to prevent displacement during operation. The connecting pipe 11 is a hollow cylindrical structure, fixedly installed at the center of the bottom of the fixed plate 1. Its axis is coaxial with the output end of the first motor 2 on the top surface of the fixed plate 1. The outer wall of the connecting pipe 11 is used to fix and sleeve the gear disk 6, and the inner wall is used for the rotating shaft 3 to move through, forming a coaxial arrangement between the gear disk 6 and the rotating shaft 3.

[0025] The first motor 2 is fixedly installed at the top center of the fixed disk 1, with its output end pointing vertically downwards. It is coaxially connected to the rotating shaft 3 through a transmission connector to ensure stable power transmission to the rotating shaft 3. The rotating shaft 3 is a solid cylindrical structure. Its outer wall is connected to the first turntable 4 and the second turntable 5 through a positioning structure such as a key and a fixed shoulder. The first turntable 4 is located on the side closer to the fixed disk 1, and the second turntable 5 is located below the first turntable 4. The two turntables rotate synchronously with the rotating shaft 3, and corresponding holes are provided on their edges for installing the clamping mechanism 7 and the sand cylinder 8.

[0026] The gear disk 6 has an internal gear ring structure, and its inner wall is fixedly sleeved on the outer wall of the connecting pipe 11. It does not rotate relative to the connecting pipe 11 and serves as a fixed meshing reference for the rotation of the clamping mechanism 7. The balls 9 have a spherical structure, are numerous and distributed in a ring array, and are rolled and embedded in the annular groove at the bottom of the fixed disk 1. The inner wall of the annular groove is provided with a wear-resistant layer, and the balls 9 can roll freely in the groove. Their outer walls can intermittently contact the arc-shaped head 707 at the top of the clamping mechanism 7, providing driving force for the reciprocating lifting and lowering of the clamping mechanism 7.

[0027] The number of clamping mechanisms 7 is the same as that of the sand cylinders 8, and they are arranged in a ring array on the first turntable 4. Each group is used to clamp one metal terminal. The specific structure and connection are as follows: Sleeve 701 is a hollow cylindrical tube, which is vertically inserted into the hole of the first turntable 4 by a fixed structure such as welding. The top of sleeve 701 extends a certain length beyond the first turntable 4, and the bottom extends below the first turntable 4. Rotary cylinder 702 is a hollow cylindrical tube, which is rotatably sleeved on the inner wall of sleeve 701 near the top port by bearings. The outer ring of the bearing is fixed to the inner wall of sleeve 701, and the inner ring is fixed to the outer wall of rotary cylinder 702, ensuring that rotary cylinder 702 can rotate flexibly relative to sleeve 701 without obvious radial movement.

[0028] The first annular stop 703 is an annular plate structure, fixedly sleeved inside the sleeve 701 and located below the rotating cylinder 702. Its top surface is a concave funnel shape, which facilitates the flow of sand. The second annular stop 704 is also an annular plate structure, fixedly sleeved on the inner wall of the sleeve 701 near the bottom port, parallel to the first annular stop 703 and spaced a certain distance apart.

[0029] The circular tube 708 is a hollow cylindrical tube that passes through the central holes of the first annular block 703 and the second annular block 704 in sequence. The vertical sliding and circumferential rotation are achieved through a guide structure such as a guide sleeve. The top of the circular tube 708 is fixedly connected to the bottom of the outer hexagonal column 706. The bottom is tapered and equipped with an electric clamp 711.

[0030] Gear 705 is a spur gear, fixedly connected to the top of rotating cylinder 702, coaxial with rotating cylinder 702, and its tooth surface meshes with the internal gear ring of gear disk 6. It can rotate with gear disk 6 when it revolves around the first rotating disk 4. External hexagonal prism 706 is a solid hexagonal prism that slides vertically through the central hexagonal hole of gear 705. It can slide up and down relative to gear 705 and rotate synchronously with gear 705. The top of external hexagonal prism 706 is fixedly connected to arc-shaped head 707, and the outer wall of arc-shaped head 707 makes rolling contact with the outer wall of ball 9.

[0031] The baffle 709 is a circular plate structure, fixedly sleeved on the outer wall of the circular tube 708 and located below the first annular stop 703. The top surface of the baffle 709 can contact the bottom surface of the first annular stop 703, limiting the maximum upward displacement of the circular tube 708. The first spring 710 is a cylindrical helical compression spring, sleeved on the outer wall of the circular tube 708, with its two ends respectively abutting against the bottom surface of the baffle 709 and the top surface of the second annular stop 704. In its natural state, it pushes the baffle 709 upward, keeping the arc-shaped head 707 in the highest position. When under pressure, it compresses and stores energy, and after the pressure is released, it drives the circular tube 708 to reset.

[0032] The electric gripper 711 is fixedly installed at the tapered end of the bottom of the circular tube 708. Its gripping end is an arc-shaped structure adapted to the metal terminal. It is equipped with anti-slip components on the inner side and can be opened and closed through electrical control to firmly grip the metal terminal.

[0033] The number of sand cylinder components 8 is the same as that of clamping mechanism 7, and they are installed in a circular array on the second turntable 5 to carry sand for grinding. The connections of each component are as follows: The sand cylinder 8 is a cylindrical structure with an electric push rod 801 fixedly installed at the bottom. The telescopic end of the electric push rod 801 moves vertically upward through the bottom of the sand cylinder 8, and a sealing component such as a sealing ring is provided at the joint to prevent sand leakage. A pressure sensor 802 is fixedly installed at the top of the telescopic end of the electric push rod 801, and the monitoring end of the pressure sensor 802 is fixedly connected to a rectangular plate 803.

[0034] A guide rod 804 is fixedly connected to the top surface of a rectangular plate 803. A U-shaped frame 805 slides through the outer wall of the guide rod 804. A limiting plate 806 is fixedly connected to the top of the guide rod 804. The limiting plate 806 can contact the inner bottom surface of the U-shaped frame 805 to prevent the U-shaped frame 805 from falling off the guide rod 804. A second spring 807 is sleeved on the outer wall of the guide rod 804. The two ends of the second spring 807 are respectively pressed against the bottom of the U-shaped frame 805 and the top surface of the rectangular plate 803, which play a role in buffering and pressure transmission.

[0035] The top of the U-shaped frame 805 is fixedly connected to the support plate 808, which is slidably sleeved on the inner wall of the sand cylinder 8. The outer wall of the support plate 808 is provided with a sealing component to ensure that the sand will not leak from below the support plate 808. A vibration motor 812 is installed at the bottom of the support plate 808, which can drive the support plate 808 to vibrate, making the sand in the sand cylinder 8 compact.

[0036] A cylinder 809 is fixedly installed at the bottom of the second turntable 5. The telescopic end of the cylinder 809 moves vertically upward through the top surface of the second turntable 5, and a U-shaped plate 810 is fixedly connected to the top of the telescopic end. A second motor 811 is fixedly installed on the side wall of the U-shaped plate 810. The two sides of the electric push rod 801 are rotatably installed inside the U-shaped plate 810 through a connecting shaft. The output end of the second motor 811 is connected to the connecting shaft on one side of the electric push rod 801, which can drive the electric push rod 801 to drive the sand cylinder 8 to rotate around the connecting shaft, so as to facilitate the pouring out of sand.

[0037] The circumferential sand-spreading structure 10 is integrated into the clamping mechanism 7 and the sand cylinder 8, and is used to evenly spread sand around the metal terminal. The specific structure and connection are as follows: The interface 1001 is opened on the outer wall of the sleeve 701 and located between the rotating cylinder 702 and the first annular stop 703, for connecting the feeding head of the sand supply equipment; a number of strip-shaped openings 1002 are arranged in a vertical annular array on the outer wall of the sand cylinder 8 above the first annular stop 703, allowing sand to enter the sand cylinder 8 from the sleeve 701; a number of sand distribution openings 1003 are arranged in an annular array on the conical surface of the bottom conical end of the circular tube 708, for evenly distributing sand into the sand cylinder 8.

[0038] A third motor 1004 is fixedly installed on the top of the circular tube 708. An installation groove is opened at the bottom of the outer hexagonal column 706, and the third motor 1004 is located in the installation groove. The output end of the third motor 1004 is shaft-connected to the rotating rod 1005. The rotating rod 1005 is located inside the circular tube 708, and the auger blade 1006 is fixedly sleeved on its outer wall. The bottom is fixedly connected to the conical block 1007.

[0039] The conical surface of the conical block 1007 is slidably connected to the conical surface inside the bottom conical end of the circular tube 708. Several guide grooves 1008 are provided on the conical surface of the conical block 1007. The auger blades 1006 can push the sand in the circular tube 708 downwards. The guide grooves 1008 can guide the sand through the sand distribution port 1003 into the sand cylinder 8. When the conical block 1007 rotates, the guide grooves 1008 are offset from the sand distribution port 1003, and the conical surface of the conical block 1007 seals the sand distribution port 1003.

[0040] During the grinding process, the sand fills the sand cylinder 8 and wraps around the metal terminals. When the terminals make a compound motion of "rotation and reciprocating lifting and lowering" in the sand, they will exert a squeezing effect on the surrounding sand: when the terminals descend, the sand density increases due to compression, and the reaction force on the support plate 808 is enhanced; when the terminals rise, the squeezing effect of the sand weakens and the reaction force decreases; at the same time, the pressure on the support plate 808 will also fluctuate due to wear or local density changes in the sand during grinding.

[0041] The pressure sensor 802 collects the aforementioned pressure change signals in real time, converts the mechanical pressure signals into electrical signals such as voltage or current signals, and continuously transmits them to the device's PLC control unit. The control unit presets the target pressure value required for terminal grinding based on the terminal material, thickness, and degree of burrs, and dynamically compares the real-time collected pressure signals with the target pressure value to determine whether the current pressure is within the acceptable range.

[0042] When the PLC control unit detects a pressure deviation, it will send a control command to the electric actuator 801 based on the direction of the deviation—insufficient pressure or excessive pressure. If the real-time pressure is lower than the target pressure, such as when the terminal rises causing the sand to compress less, or when the sand wears down and the filling amount decreases, the control unit commands the telescopic end of the electric push rod 801 to extend upward, pushing the pressure sensor 802 and the rectangular plate 803 to rise synchronously. The rectangular plate 803 pushes the U-shaped frame 805 upward through the second spring 807, causing the support plate 808 to slide upward along the inner wall of the sand cylinder 8, compressing the sand to increase the pressure of the sand on the terminal, until the real-time pressure collected by the pressure sensor 802 returns to the target value.

[0043] If the real-time pressure is higher than the target pressure, such as excessive compression of the sand due to the descent of the terminal, or local accumulation of sand, the control unit commands the telescopic end of the electric push rod 801 to retract downwards, causing the pressure sensor 802 and the rectangular plate 803 to descend synchronously; the second spring 807 gradually releases its elastic force as the rectangular plate 803 descends, and the U-shaped frame 805 drives the support plate 808 to slide downwards under the reaction force of the sand, relieving the sand compression state and reducing the real-time pressure to the target pressure.

[0044] The second spring 807 acts as a buffer to prevent uneven force on the terminals caused by sudden pressure changes when the electric push rod 801 is adjusted, thus ensuring a smooth transition during the pressure adjustment process.

[0045] Maintaining constant pressure during the polishing process is key to ensuring uniform polishing of the terminal edges. If the pressure is insufficient, the sand will exert a weak squeezing force on the edge of the terminal, resulting in insufficient friction between the terminal and the sand. This can easily lead to burrs at the corners of the terminal edge not being fully removed, resulting in grinding residue. If the pressure is too high, the sand will squeeze the terminals excessively, which may cause the terminals to deform or cause excessive wear on the terminal edges, thus damaging the original dimensional accuracy of the terminals.

[0046] Through the real-time linkage between the pressure sensor 802 and the electric push rod 801, the pressure of the abrasive on the terminal is kept stable within the target range, ensuring that the edge of the terminal, including the corners of the gaps, maintains a uniform and sufficient friction intensity with the abrasive, which not only thoroughly removes burrs but also avoids damage to the terminal, ultimately ensuring the consistency and reliability of the grinding effect.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A low-voltage wire harness terminal edge processing device, comprising a fixing plate (1), characterized in that: A first motor (2) is fixedly installed at the center of the top of the fixed disk (1). The output end of the first motor (2) is vertically connected to a rotating shaft (3). The outer wall of the rotating shaft (3) is fixedly connected to a first turntable (4) and a second turntable (5). A gear disk (6) is fixedly installed between the fixed disk (1) and the first turntable (4). Several clamping mechanisms (7) are arranged in a ring array on the first turntable (4). The clamping mechanisms (7) and the gear disk (6) are meshed and driven. Several sand cylinders (8) are arranged in a ring array on the second turntable (5). The height of the sand cylinders (8) is adjustable and located directly below the clamping mechanisms (7). Several balls (9) are rolled in a ring array at the bottom of the fixed disk (1). The top of the clamping mechanism (7) is rolledly connected to the outer wall of the balls (9) at intervals to drive the bottom of the clamping mechanism (7) to move up and down. A circular sand-spreading structure (10) is also provided in the clamping mechanism (7). The clamping mechanism (7) includes a sleeve (701) fixedly connected to the first turntable (4), a rotating cylinder (702) rotatably sleeved on the inner wall of the sleeve (701) near the top port, a first annular stop (703) fixedly sleeved on the inner wall below the rotating cylinder (702), and a second annular stop (704) fixedly sleeved on the inner wall near the bottom port; a gear (705) meshing with the gear disk (6) is fixedly connected to the top of the rotating cylinder (702), an external hexagonal prism (706) vertically slides through the center of the gear (705), an arc-shaped head (707) is fixedly connected to the top of the external hexagonal prism (706), the outer wall of the arc-shaped head (707) is in rolling connection with the outer wall of the ball (9), and the first annular stop (703) and the second annular stop (704) are fixedly sleeved on the inner wall of the first turntable (4). A circular tube (708) is vertically slidable and rotatably connected at the center of (704). The top of the circular tube (708) is fixedly connected to the bottom of the outer hexagonal column (706). A baffle (709) is fixedly sleeved on the outer wall of the circular tube (708) below the first annular block (703). The top surface of the baffle (709) is in contact with the bottom of the first annular block (703). A first spring (710) is sleeved on the outer wall of the circular tube (708). The two ends of the first spring (710) are respectively pressed against the bottom surface of the baffle (709) and the top surface of the second annular block (704). The bottom of the circular tube (708) is tapered, and an electric gripper (711) is fixedly installed at the bottom of the tapered end. The top surface of the first annular block (703) is a concave flared mouth. An electric push rod (801) is fixedly installed at the bottom of the sand cylinder (8). The telescopic end of the electric push rod (801) moves vertically upward through the bottom of the sand cylinder (8), and a pressure sensor (802) is fixedly installed at the top of the telescopic end. A rectangular plate (803) is fixedly installed at the monitoring end of the pressure sensor (802). A guide rod (804) is fixedly connected to the top surface of the rectangular plate (803). A U-shaped frame (805) with an upward opening is slidably connected to the outer wall of the guide rod (804), and a limiting plate (806) that blocks the bottom surface of the U-shaped frame (805) is fixedly connected to its top. A second spring (807) is sleeved on the outer wall of the guide rod (804), and the two ends of the second spring (807) are respectively connected to the U-shaped frame (805). The bottom of the rectangular plate (803) is blocked by the top surface of the U-shaped frame (805); the top of the U-shaped frame (805) is fixedly connected to the support plate (808) which is slidably sleeved on the inner wall of the sand cylinder (8); the bottom of the second turntable (5) is fixedly installed with a cylinder (809); the telescopic end of the cylinder (809) moves vertically upward through the top surface of the second turntable (5), and the top of the telescopic end is fixedly connected with a U-shaped plate (810); the side wall of the U-shaped plate (810) is fixedly installed with a second motor (811); the two side walls of the electric push rod (801) are rotatably installed inside the U-shaped plate (810) through the connecting shaft; the output end of the second motor (811) is shaft-connected to the connecting shaft on one side of the electric push rod (801); the bottom of the support plate (808) is installed with a vibration motor (812).

2. The low-voltage wire harness terminal edge processing device according to claim 1, characterized in that: A connecting pipe (11) is fixedly installed at the center of the bottom of the fixed plate (1), the inner wall of the gear plate (6) is fixedly sleeved on the outer wall of the connecting pipe (11), and the rotating shaft (3) moves through the center of the connecting pipe (11).

3. The low-voltage wire harness terminal edge processing device according to claim 1, characterized in that: The circumferential sand distribution structure (10) includes a connecting interface (1001), strip-shaped openings (1002), and sand distribution openings (1003). The connecting interface (1001) is located on the outer wall between the rotating drum (702) and the first annular stop (703), and is used to connect to the supply port of the sand supply equipment. Several strip-shaped openings (1002) are arranged in a vertical annular array on the outer wall of the sand cylinder (8) above the first annular stop (703). Several sand distribution openings (1003) are arranged in an annular array on the conical surface of the bottom conical end of the circular tube (708). The circumferential sand distribution structure (10) also includes a fixed installation on the circular tube (708). The top third motor (1004) has an installation groove at the bottom of the outer hexagonal column (706). The third motor (1004) is located in the installation groove. The output end of the third motor (1004) is shaft-connected to a rotating rod (1005) located inside the circular tube (708). The outer wall of the rotating rod (1005) is fixedly sleeved with an auger blade (1006), and a conical block (1007) is fixedly connected to its bottom. The conical surface of the conical block (1007) is slidably connected to the conical surface inside the conical end of the bottom of the circular tube (708). Several guide grooves (1008) are arranged in a ring array on the conical surface of the conical block (1007).

4. A method for edge treatment of low-voltage wire harness terminals, characterized in that, The low-voltage wire harness terminal edge processing device according to any one of claims 1-3 includes the following steps: S1, the clamping end of the clamping mechanism (7) clamps the metal terminal and lifts the sand cylinder (8). S2, Circumferential sanding structure (10) is used to sand around the metal terminal to fill the metal terminal; S3, the first motor (2) drives the first turntable (4) and the second turntable (5) to rotate synchronously through the rotating shaft (3). Under the meshing transmission action of the clamping mechanism (7) and the gear disk (6), the clamping mechanism (7) rotates, and the metal terminal buried in the sand in the sand cylinder (8) rotates. At the same time, the top of the clamping mechanism (7) is intermittently connected to the outer wall of several balls (9), driving the bottom of the clamping mechanism (7) to move up and down repeatedly, so that the metal terminal buried in the sand in the sand cylinder (8) moves up and down repeatedly. The metal terminal rotates and moves up and down repeatedly in the sand, polishing the edges of the metal terminal with the sand. S4, the first motor (2) drives the first turntable (4) and the second turntable (5) to rotate in opposite directions via the rotating shaft (3).

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