Groove forming equipment for fuse contact piece

Abstract

The invention relates to a profiled groove forming device for a fuse contact piece, which comprises a base arranged on a table top of a rack and provided with a plurality of lifting columns for a movable carrying table to move up and down along the lifting columns; the movable carrying table is used for installing the fuse contact piece, enables the processing surface of the fuse contact piece to be placed upwards, and is driven by a jacking mechanism to ascend or descend; the scraping assembly is fixedly arranged at the top of the base in a suspended mode and used for conducting scraping and slotting on the fuse contact piece on the movable carrying table; the moving direction of the scraping assembly is perpendicular to the lifting direction of the movable carrying table. The power unit is connected to the scraping assembly and the grinding and polishing assembly; the grinding and polishing assembly is used for grinding the edge of the blasting groove; the profiled groove forming equipment for the fuse contact piece is simple in structure, low in cost and easy to implement, and the problems that in the existing profiled groove machining process, efficiency is extremely low, cost is high, and microcracks are likely to be generated on the surface are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of connector production, in particular to a type groove forming equipment for a fuse contact. BACKGROUND

[0002] Nowadays, electric vehicles (new energy vehicles) have been continuously popularized and applied, and the fuse is one of the core components of the safety of electric vehicles. At least dozens of fuses need to be installed in an electric vehicle, and the demand is large. At present, the existing fuse installation is mostly achieved through a buckle type structure. Although this method can achieve assembly, it also has the problems of easy loosening (loosening when the vehicle body is jolted), poor contact and the like, resulting in poor or insensitive fusing effect, which directly affects the driving safety. Therefore, in the subsequent structure of the fuse, the buckle type clamping method is changed to a method of fixing the end cap tightly around the two ends of the ceramic melt, and the contact knife for conducting electricity and connection is detachably connected with the cap body for sleeving the ceramic melt, so as to improve the existing problems of loosening and poor contact of the buckle type. The cap body of the end cap and the contact knife are connected and formed by welding to ensure the stability.

[0003] It is found in the use of the above-mentioned method that the fusing effect is not ideal and the response mode is single. Only the fusing method is used for disconnection, and when an external force acts, the fuse may not be disconnected (fused). For example, when the vehicle is hit by an external force, the fuse cannot be disconnected and continues to conduct electricity to a high temperature before it can be fused, which has safety hazards. Therefore, the researchers designed a fuse combined with a trace amount of explosive and a contact piece, that is, a trace amount of explosive was designed on the basis of safety and good stability. When an external force or an overload current is applied, the connection part of the contact piece is blown off, thereby ensuring safe and reliable fusing.

[0004] However, the design and production of the trace amount of explosive to blow off the connection part of the contact piece are very elaborate, and the thickness of the connection part needs to be very precise. If the thickness is too thick, it cannot be blown off and disconnected, and if the thickness is too thin, it is easily broken by an external force. Therefore, the processing generally uses slow wire cutting, but this processing method has the problem of extremely low processing efficiency. Slow wire cutting is a precision machining method, and the processing time of a single contact piece connection part can be more than 30 minutes. Moreover, only one workpiece can be processed at a time, which cannot meet the demand of large-scale production of electric vehicle fuses. At the same time, the purchase and maintenance cost of the slow wire cutting equipment is high, which greatly increases the production cost of the fuse, resulting in a high price of the terminal product. In addition, the assembly precision of the trace amount of explosive needs to be very high, and the trace amount of explosive needs to be precisely aligned with the contact piece connection part. The existing manual assembly method not only has low efficiency, but also has assembly deviation, which causes the explosive force to not act precisely on the connection part, thereby causing the problems of "not being blown off" or "overblown and damaging other parts".

[0005] In summary, existing fuses based on micro-explosives still have many shortcomings in terms of processing efficiency, manufacturing cost, assembly accuracy, and reliability, making it difficult to meet the core requirements of electric vehicles for "efficient mass production, low cost, and high reliability" of safety components, and further improvements are urgently needed. Summary of the Invention

[0006] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide a groove forming device for fuse contacts, which has a simple structure, low cost and is easy to implement, and solves the problems of extremely low efficiency, high cost and easy generation of microcracks on the surface in the existing groove processing process.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A groove forming apparatus for fuse contacts, used for scraping and forming burst grooves for fuse contacts; the forming apparatus includes:

[0009] A frame for placing and installing the base, movable platform, scraping assembly, power unit and grinding and polishing assembly;

[0010] The base is set on the platform of the frame and is equipped with several lifting columns to allow the movable platform to move up and down along the lifting columns.

[0011] A movable platform is used for mounting fuse contacts, and the machined surface of the fuse contacts is placed upwards. It is driven to rise or fall by a lifting mechanism.

[0012] A scraping assembly, which is fixedly suspended on the top of the base, is used to scrape and groove the fuse contacts on the movable platform; the movement direction of the scraping assembly is perpendicular to the lifting direction of the movable platform.

[0013] The power unit, which is connected to the scraping assembly and the polishing assembly, is used to push the scraping assembly to scrape along the length direction perpendicular to the fuse contact piece on its upper surface, and to drive the polishing assembly to rotate.

[0014] A grinding and polishing assembly for grinding the edges of the bursting groove;

[0015] The movable platform moves the fuse contacts gradually by rising, and contacts and scrapes the scraping component that is displaced by the power unit. After scraping, the edge of the explosion groove is polished by the grinding and polishing component.

[0016] Furthermore, the movable platform is provided with a positioning fixture for limiting the fuse contact piece; the positioning fixture includes a positioning pin and a limiting component, the positioning pin is used to circumferentially limit the fuse contact piece, and the limiting component is used to press and fix the fuse contact piece to the upper surface of the positioning fixture.

[0017] Furthermore, a lifting mechanism is provided below the movable platform for supporting the lifting and lowering of the movable platform; wherein the lifting mechanism includes a first servo motor, a first lead screw and a lifting sleeve, the servo motor is used to drive the first lead screw to rotate; one end of the lifting sleeve is screwed to the lead screw and the other end is hinged to the movable platform.

[0018] Furthermore, the scraping assembly includes a fixed base, a scraper holder, a scraper blade, and a blade locking member; the fixed base is suspended and locked on the base, and forms a sliding groove for the scraper holder to move back and forth; the scraper holder is provided with an adjustment groove extending in the vertical direction, and the scraper blade can move up and down along the adjustment groove to adjust the height of the blade extension; the blade locking member is used to lock the adjusted scraper blade to the scraper holder.

[0019] Furthermore, the two cutting surfaces of the scraper blade intersect at an included angle, wherein the included angles between the two cutting surfaces and the blade edge are different.

[0020] Furthermore, the power unit includes a second servo motor, a linear module, a first transmission group, and a second transmission group. The second servo motor is connected to the linear module via the first transmission group. The linear module is connected to the scraping assembly to drive the scraping assembly to feed linearly. The second transmission group is coaxially arranged with the second servo motor and is used to drive the grinding and polishing assembly to rotate.

[0021] Furthermore, the linear module includes a second lead screw and a bridging sleeve. The second lead screw is driven to rotate by a first transmission group. One end of the bridging sleeve is sleeved on the second lead screw and forms a threaded engagement, while the other end is axially connected to the scraper holder. The second servo motor rotates, which drives the second lead screw to rotate via the first transmission group. This causes the bridging sleeve to translate axially along the second lead screw, thereby causing the scraper holder to linearly displace relative to the fixed base.

[0022] Furthermore, the polishing assembly includes a polishing base, several adjusting wheels, a sanding belt, and an angle adjusting component; the polishing base is installed on the side of the base and has a placement position for the scraped fuse contacts; each of the adjusting wheels is arranged in a polishing base and the sanding belt is wound around it, and one of the adjusting wheels is connected to the second transmission group in a non-rotating manner to drive the adjusting wheel to ride on the sanding belt and rotate; the sanding belt is used to grind the scraped fuse contacts.

[0023] Furthermore, the grinding and polishing assembly also includes a receiving plate, a slide rail, and a driving component. The receiving plate is used to mount the scraped fuse contacts and is driven by a sliding assembly to abut against the abrasive belt for grinding. The driving component is used to drive the receiving plate to slide along the slide rail.

[0024] Furthermore, it also includes a debris collection assembly, which includes a dust collection tank and a negative pressure suction nozzle. The dust collection tank is located on the movable platform and connected to the negative pressure suction nozzle for adsorbing and collecting metal debris generated during scraping.

[0025] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The groove forming equipment for fuse contacts provided by the present invention has a simple structure, low cost and easy implementation; the groove forming equipment adopted by the present invention greatly improves processing efficiency and adapts to mass production requirements. With precise feed, the forming of two cutting surfaces at different angles can be completed in only 20-30 scrapings, and multiple grooves can be processed simultaneously. That is, with the linear feed of the scraping component and the precise lifting of the movable platform, the processing time of a single groove is ≤5 minutes, which is more than 15 times more efficient than slow wire EDM; continuous batch processing can be achieved, which is fully adapted to the core requirement of "mass production" of electric vehicle fuses;

[0027] In addition, processing costs are significantly reduced; processing efficiency is improved, reducing unit labor hour costs, and there is no need for additional processes such as subsequent microcrack repair. The consumables of slow wire EDM are also extremely high, resulting in a comprehensive reduction of more than 50% in production and manufacturing costs.

[0028] (2) The processing accuracy and reliability of the present invention are improved, ensuring the safety of the fuse: the double fixing structure of the positioning fixture ensures that there is no displacement during the processing of the contact piece, and the lifting and feeding structure driven by the servo motor achieves a thickness tolerance of ≤±0.01mm for the explosion groove, which fully meets the precise requirements of the connection thickness for micro explosives; the grinding and polishing component optimizes the quality of the groove edge, avoids stress concentration caused by burrs, and avoids micro-crack defects in slow wire cutting, so that the contact piece connection can be accurately and stably blown open when there is external force or current overload, ensuring the reliability of the fuse.

[0029] (3) The adjustable height structure of the scraping blade and the adjustable spacing design of the positioning fixture of the scraping assembly described in this invention can be adapted to the processing of fuse contact burst grooves of different sizes and specifications; the angle adjustment and replaceable abrasive belt design of the grinding and polishing assembly can meet the requirements of different edge grinding precision;

[0030] (4) The present invention utilizes the positioning fixtures set on the moving carrier to achieve precise positioning and placement of the fuse contact piece, and achieves circumferential positioning and pressing positioning during the processing, ensuring the accuracy of subsequent processing. In particular, when the double-sided V-groove on the fuse contact piece is machined, the size of the bursting groove can be ensured. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural diagram of the groove forming equipment of the present invention;

[0033] Figure 2 This is a three-dimensional structural diagram of the frame of the present invention;

[0034] Figure 3 This is a three-dimensional structural diagram of the base and scraping assembly of the present invention;

[0035] Figure 4 This is a three-dimensional structural diagram of the active carrier of the present invention;

[0036] Figure 5 This is a three-dimensional structural diagram of the power unit of the present invention;

[0037] Figure 6 This is a three-dimensional structural diagram of the polishing assembly of the present invention. Detailed Implementation

[0038] 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 preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0040] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0041] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0042] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0043] See Figures 1-6 This invention discloses a groove forming device for fuse contacts, used for scraping and forming burst grooves in fuse contact A. It should be noted that the burst grooves are V-shaped, and the upper and lower surfaces of the fuse each have such V-shaped burst grooves. The distance between the bottoms of the two V-shaped burst grooves is the burst spacing, which cannot be too thick or too thin; the dimensional accuracy must be extremely precise. Furthermore, the inclination angles of the two groove surfaces of the V-shaped burst grooves are different, which is one of the reasons why this product is difficult to process. However, by using the groove forming device described in this invention, rapid forming, high precision, and consistent quality can be achieved, as detailed below:

[0044] The molding equipment of the present invention includes:

[0045] A frame 1 is provided for the placement and installation of the base 2, movable platform 3, scraping assembly 4, power unit 5 and grinding and polishing assembly 6; in this embodiment, the frame 1 is formed by welding steel plates.

[0046] The base 2 is set on the platform of the frame 1 and is provided with several lifting columns 21 for the movable platform 3 to move up and down along the lifting columns 21; four lifting columns 21 are fixed on the platform of the frame 1, and a top surface is fixed on the top of the four lifting columns 21; the top surface is subsequently used for the scraping assembly 4 to be suspended.

[0047] The movable platform 3 is used for mounting the fuse contact A and placing the machined surface of the fuse contact A upwards. It is driven to rise or fall by the lifting mechanism 7. In this embodiment, the movable platform 3 is rectangular and has guide holes at its four corners corresponding to the lifting column 21. The movable platform 3 is sleeved on the lifting column 21 through the guide holes and can slide smoothly along the lifting column 21.

[0048] The movable platform 3 is equipped with a positioning fixture 31 for limiting the fuse contact A; the positioning fixture 31 includes a positioning pin and a limiting component. The positioning pin is used to circumferentially limit the fuse contact A, and the limiting component is used to press and fix the fuse contact A to the upper surface of the positioning fixture 31. The limiting component can be used to fix the fuse contact A to the positioning fixture 31 by vacuum adsorption, or it can be used by a cylinder in conjunction with a pressure block to press the fuse contact A to the upper surface of the positioning fixture 31.

[0049] In addition, a lifting mechanism 7 is provided below the movable platform 3, which is used to support the lifting and lowering of the movable platform 3. Due to the need for precise feed accuracy, the lifting structure uses a first servo motor 71 as the driving component, in conjunction with a first lead screw 72 and a lifting sleeve 73, to achieve precise lifting and lowering displacement. The servo motor is used to drive the first lead screw 72 to rotate. One end of the lifting sleeve 73 is screwed to the lead screw, and the other end is hinged to the movable platform 3. In this embodiment, a first servo motor 71 of model MSMZ042A1A, a ball screw (first lead screw 72) with a lead of 5mm and a lifting sleeve 73 are used. The first servo motor 71 is fixed to one end of the first lead screw 72 through a coupling. One end of the lifting sleeve 73 is screwed to the first lead screw 72 through an internal thread, and the other end is hinged to the bottom center of the movable platform 3 through a fisheye bearing, so as to achieve smooth lifting and lowering of the movable platform 3, with a lifting accuracy of ≤±0.01mm and a lifting stroke of 0-50mm.

[0050] The scraping assembly 4 is fixedly suspended on the top of the base 2 and is used to scrape and groove the fuse contact A on the movable platform 3; the movement direction of the scraping assembly 4 is perpendicular to the lifting direction of the movable platform 3.

[0051] The scraping assembly 4 includes a fixed base 41, a scraper holder 42, a scraper blade 43, and a blade locking member 44;

[0052] The fixed seat 41 is suspended and locked on the base 2, and forms a groove 45 for the scraper holder 42 to move back and forth. In this embodiment, the fixed seat 41 is made of cast iron and is locked to the top of the base 2 by 4 bolts. A T-shaped groove 45 extending in the horizontal direction is opened on the fixed seat 41 for the scraper holder 42 to move back and forth.

[0053] The scraper holder is slidably installed in the T-shaped groove 45, and the scraper holder 42 is provided with an adjustment groove extending in the vertical direction. The scraper blade 43 can move up and down along the adjustment groove 45 to adjust the height of the cutting edge extension. It should be noted that, in order to adapt to the inclined surface size of the V-shaped bursting groove (the angle between the two cutting surfaces and the cutting edge is different), the scraper blade 43 in this embodiment is made of tungsten steel, and the two cutting surfaces intersect at an angle, wherein the angle between the main cutting surface and the cutting edge is 15°, and the angle between the secondary cutting surface and the cutting edge is 25°, and the cutting edge is precision ground. In addition, the scraper blade 43 can move up and down along the adjustment groove, with an adjustment range of 0-10mm, to adapt to the processing of bursting grooves of different depths. The blade locking member 44 is used to lock the adjusted scraper blade 43 to the scraper holder 42.

[0054] The power unit 5 is connected to the scraping assembly 4 and the polishing assembly 6. It is used to push the scraping assembly 4 to scrape its upper surface along the length direction perpendicular to the fuse contact A, and to drive the polishing assembly 6 to rotate.

[0055] In this embodiment, the power group 5 includes a second servo motor 51, a linear module 52, a first transmission group (not shown in the figure) and a second transmission group 53. In this embodiment, the power group 5 is installed inside the frame 1 on one side of the base 2, including a second servo motor 51 with model number MSMZ082A1A, a linear module 52, a first transmission group (not shown in the figure) (synchronous belt pulley drive) and a second transmission group 53 (tank chain drive).

[0056] The second servo motor 51 is connected to the linear module 52 via the first transmission group (not shown in the figure). The linear module 52 is connected to the scraping assembly 4 to drive the scraping assembly 4 to feed linearly. The second transmission group 53 is coaxially arranged with the second servo motor 51 and is used to drive the polishing assembly 6 to rotate.

[0057] The linear module 52 includes a second lead screw (i.e., a ball screw) (not shown in the figure) and a bridging sleeve 521. The second lead screw is driven to rotate via a first transmission group (not shown in the figure). One end of the bridging sleeve 521 is fitted onto the second lead screw and forms a threaded engagement, while the other end is axially connected to the scraper holder 42. When the second servo motor 51 rotates, it drives the second lead screw to rotate via the first transmission group (not shown in the figure), which in turn causes the bridging sleeve 521 to translate axially along the second lead screw, thereby causing the scraper holder to linearly displace relative to the fixed seat 41. It should be noted that one end of the bridging sleeve 521 is threaded to the second lead screw (not shown in the figure) via an internal thread, and the other end is axially connected to the bottom of the scraper holder 42 via a bolt. This allows the second servo motor 51 to rotate, which in turn drives the second lead screw to rotate via the first transmission group, thereby causing the bridging sleeve 521 to translate axially along the second lead screw, driving the scraper holder 42 to linearly displace relative to the fixed seat 41. The feed speed can be steplessly adjusted within the range of 5-20 mm / s.

[0058] The grinding and polishing assembly 6 is used to grind the edge of the bursting groove; it should be noted that the grinding and polishing assembly 6 is driven by the second transmission group 53 to realize the grinding action;

[0059] The polishing assembly 6 includes a polishing base 61, several adjusting wheels 62, a sanding belt 63, and an angle adjusting component 64;

[0060] The polishing base 61 is installed on the side of the base 2 and has a placement position for the scraped fuse contact A; that is, the polishing assembly is installed on the table of the frame 1 on the side of the base 2, and the horizontal distance between it and the scraping assembly 4 is 50-100mm; in this embodiment, the polishing assembly 6 includes the polishing base 61, three adjusting wheels 62 (50mm in diameter), abrasive belt 63 (using 1000-mesh alumina abrasive belt 63, 5mm wide), angle adjusting component 64, receiving plate, slide rail and driving component (miniature cylinder); the specific assembly is as follows:

[0061] The polishing base 61 is made of aluminum alloy and has a placement position for placing the fuse contact A after scraping (with the same positioning accuracy as the positioning fixture 31). Three adjusting wheels 62 are arranged in a triangle inside the polishing base 61. One of the adjusting wheels 62 is the driving wheel, which is connected to the driven gear drive shaft of the second transmission group 53 to prevent rotation. The other two are driven wheels, which are used to tension the abrasive belt 63.

[0062] Angle adjustment component 64 is used to adjust the tightness of the three adjustment wheels 62 and to replace the abrasive belt 63 after loosening;

[0063] The receiving plate 65 is slidably engaged with the slide rail 66 via a slider. The slide rail 66 is arranged horizontally and parallel to the feed direction of the abrasive belt 63. The piston rod of the miniature cylinder is connected to one end of the receiving plate 65, which can drive the receiving plate 65 to move the contact piece along the slide rail 66, so that the edge of the contact piece's burst groove can fully contact the abrasive belt 63 for grinding.

[0064] The debris collection assembly 8 includes a dust collection tank 81 and a negative pressure suction nozzle (not shown in the figure). The dust collection tank 81 is located on the movable platform 3 and is elongated. The bottom of the dust collection tank 81 is connected to the negative pressure suction nozzle through a hose. The negative pressure suction nozzle is an industrial suction nozzle of model TF-100 and is connected to a negative pressure fan (negative pressure value ≥ -0.08MPa) for real-time adsorption and collection of metal debris generated during the scraping process.

[0065] In actual processing,

[0066] (1) Start the main power supply of the equipment and set the processing parameters through the control panel: scraping component 4 feed speed 10mm / s, blasting groove processing depth 0.5mm, grinding and polishing component 6 abrasive belt 63 rotation speed 500r / min, abrasive belt 63 parallel to the contact plate processing surface;

[0067] Adjust the height of the scraper blade 43: Loosen the blade locking member 44, measure the distance between the blade edge and the surface of the movable platform 3 using a dial indicator, adjust it to 0.5mm, and then tighten the locking member to fix the scraper blade 43; adapt to the size of the fuse contact A to be processed. 1

[0068] (2) Place the fuse contact A on the positioning fixture 31, so that the preset positioning hole of the fuse contact A is fitted into the positioning pin, ensuring that the processing surface of the contact is facing upwards, and place it on the movable platform 3. Then, use the cylinder to drive the pressure block to press the fuse contact A, and gently pull the edge of the contact to confirm that there is no looseness, and complete the workpiece clamping.

[0069] (3) Scraping and grooving process: Start the second servo motor 51, drive the second lead screw (not shown in the figure) of the linear module 52 to rotate through the first transmission group (not shown in the figure), and the bridging sleeve 521 links the scraper holder 42 to move along the T-shaped slide 45 of the fixed seat 41 to the starting position of the contact plate processing area; at the same time, start the first servo motor 71, drive the first lead screw 72 of the lifting mechanism 7 to rotate, and the lifting sleeve 73 drives the movable platform 3 to slowly rise along the lifting column 21 at a rising speed of 0.05 mm / s until the contact plate processing surface contacts the cutting edge of the scraper blade 43;

[0070] (4) The second servo motor 51 continues to run, driving the scraping assembly 4 to feed and scrape in a direction perpendicular to the length of the fuse contact A. During the scraping process, the movable platform 3 remains stationary, and the blade edge scrapes the contact surface to form a bursting groove. At the same time, the negative pressure fan is started, and the negative pressure suction nozzle of the debris collection assembly 8 adsorbs the metal debris generated by scraping in real time through the dust collection groove 81.

[0071] When the scraping component 4 is fed to the preset stroke, the second servo motor 51 rotates in reverse, driving the scraping component 4 to reset to the starting position. This process is repeated until a groove with a preset angle and depth is scraped out. Then the first servo motor 71 rotates in reverse, driving the movable platform 3 to descend to the initial height, and the scraping and grooving process is completed.

[0072] (5) Manually remove the scraped fuse contact A and place it on the receiving plate 65 of the polishing assembly 6. It is fixed by the positioning block on the receiving plate 65. Start the polishing assembly 6. The second servo motor 51 drives the adjusting wheel 62 to rotate through the second transmission group 53, thereby driving the abrasive belt 63 to rotate at high speed. At the same time, start the micro cylinder to drive the receiving plate 65 to slide along the slide rail 66, so that the edge of the explosion groove of the contact contact contacts the abrasive belt 63 for grinding.

[0073] During the grinding process, the abrasive belt 63 performs fine grinding on the burrs and flash on the side edge of the explosion groove, with a grinding time of 5 seconds per piece; after grinding, the micro cylinder drives the receiving plate 65 to reset and remove the processed fuse contact A.

[0074] By repeating the above steps of "workpiece clamping - scraping and grooving - grinding and polishing", continuous batch processing of the burst groove of fuse contact A can be achieved, with a processing time of ≤5 minutes per batch (2 pieces).

[0075] The present invention provides a groove forming device for fuse contacts, which is simple in structure, low in cost, and easy to implement. The groove forming device adopted in this invention significantly improves processing efficiency and adapts to mass production requirements. Utilizing precise feed, the scraping process can complete the forming of two cutting surfaces at different angles in only 20-30 scraping operations, and can achieve simultaneous processing of multiple grooves. That is, with the linear feed of the scraping component and the precise lifting and lowering of the movable platform, the processing time for a single groove is ≤5 minutes, which is more than 15 times more efficient than slow wire EDM. It can achieve continuous batch processing and is fully adapted to the core requirement of "mass production" of electric vehicle fuses.

[0076] Furthermore, processing costs are significantly reduced; improved processing efficiency reduces unit labor costs and eliminates the need for additional processes such as subsequent micro-crack repair. The consumables for wire EDM are also extremely high, resulting in a comprehensive reduction of manufacturing costs by over 50%. The invention also improves processing precision and reliability, ensuring fuse safety: the double-fixed structure of the positioning fixture ensures no displacement during contact processing; the servo motor-driven lifting and feeding structure achieves a burst groove thickness tolerance of ≤±0.01mm, fully meeting the precise requirements of micro-explosive materials for the connection thickness; the grinding and polishing assembly optimizes the groove edge quality, avoiding stress concentration caused by burrs, while also mitigating micro-crack defects inherent in wire EDM, enabling the contact connection to burst precisely and stably under external force or current overload, ensuring the reliability of the fuse. The scraping assembly features an adjustable scraping blade height structure and an adjustable spacing design for the positioning fixture, making it adaptable to the processing of burst grooves for fuse contacts of different sizes and specifications. The grinding and polishing assembly's angle adjustment and replaceable abrasive belt design can meet different edge grinding precision requirements. This invention utilizes positioning fixtures set on a movable carrier to achieve precise positioning and placement of fuse contacts, as well as circumferential positioning and pressing positioning during processing, ensuring the accuracy of subsequent processing. In particular, when processing double-sided V-groove butt joints on fuse contacts, it can further ensure the dimensions of the burst groove.

[0077] The description of the above specification and embodiments is used to explain the scope of protection of the present invention, but does not constitute a limitation on the scope of protection of the present invention.

Claims

1. A groove forming device for fuse contacts, used for scraping and forming burst grooves for fuse contacts; characterized in that: The molding equipment includes: A frame for placing and installing the base, movable platform, scraping assembly, power unit and grinding and polishing assembly; The base is set on the platform of the frame and is equipped with several lifting columns to allow the movable platform to move up and down along the lifting columns. A movable platform is used for mounting fuse contacts, and the machined surface of the fuse contacts is placed upwards. It is driven to rise or fall by a lifting mechanism. A scraping assembly, which is fixedly suspended on the top of the base, is used to scrape and groove the fuse contacts on the movable platform; the movement direction of the scraping assembly is perpendicular to the lifting direction of the movable platform. The power unit, which is connected to the scraping assembly and the polishing assembly, is used to push the scraping assembly to scrape along the length direction perpendicular to the fuse contact piece on its upper surface, and to drive the polishing assembly to rotate. A grinding and polishing assembly for grinding the edges of the bursting groove; The movable platform moves the fuse contacts gradually by rising, and contacts and scrapes the scraping component that is displaced by the power unit. After scraping, the edge of the explosion groove is polished by the grinding and polishing component.

2. The groove forming equipment for fuse contacts as described in claim 1, characterized in that: The movable platform is equipped with a positioning fixture for limiting the fuse contact piece; the positioning fixture includes a positioning pin and a limiting component. The positioning pin is used to circumferentially limit the fuse contact piece, and the limiting component is used to press and fix the fuse contact piece to the upper surface of the positioning fixture.

3. The groove forming equipment for fuse contacts as described in claim 2, characterized in that: A lifting mechanism is provided below the movable platform for supporting the lifting and lowering of the movable platform; wherein the lifting mechanism includes a first servo motor, a first lead screw and a lifting sleeve, the servo motor is used to drive the first lead screw to rotate; one end of the lifting sleeve is screwed to the lead screw and the other end is hinged to the movable platform.

4. A groove forming device for fuse contacts as described in claim 1, 2, or 3, characterized in that: The scraping assembly includes a fixed base, a scraper holder, a scraper blade, and a blade locking component; the fixed base is suspended and locked on the base and forms a sliding groove for the scraper holder to move back and forth; the scraper holder is provided with an adjustment groove extending in the vertical direction, and the scraper blade can move up and down along the adjustment groove to adjust the height of the blade extension. The blade locking element is used to lock the adjusted scraping blade to the scraping blade holder.

5. The groove forming equipment for fuse contacts as described in claim 4, characterized in that: The two cutting surfaces of the scraper blade intersect at an included angle, wherein the included angles between the two cutting surfaces and the blade edge are different.

6. The groove forming equipment for fuse contacts as described in claim 4, characterized in that: The power unit includes a second servo motor, a linear module, a first transmission group, and a second transmission group. The second servo motor is connected to the linear module via the first transmission group. The linear module is connected to the scraping assembly to drive the scraping assembly to feed linearly. The second transmission group is coaxially arranged with the second servo motor and is used to drive the grinding and polishing assembly to rotate.

7. The groove forming equipment for fuse contacts as described in claim 6, characterized in that: The linear module includes a second lead screw and a bridging sleeve. The second lead screw is driven to rotate by a first transmission group. One end of the bridging sleeve is fitted onto the second lead screw and forms a threaded engagement, while the other end is axially connected to the scraper holder. The second servo motor rotates, which drives the second lead screw to rotate via the first transmission group. This causes the bridging sleeve to translate axially along the second lead screw, thereby causing the scraper holder to move linearly relative to the fixed base.

8. The groove forming equipment for fuse contacts as described in claim 7, characterized in that: The polishing assembly includes a polishing base, several adjusting wheels, a sanding belt, and an angle adjusting component; the polishing base is installed on the side of the base and has a placement position for the scraped fuse contacts; each of the adjusting wheels is arranged in a polishing base and is wound around the sanding belt, and one of the adjusting wheels is connected to the second transmission group to prevent rotation, so as to drive the adjusting wheel to ride on the sanding belt and rotate; the sanding belt is used to grind and scrape the fuse contacts.

9. The groove forming equipment for fuse contacts as described in claim 8, characterized in that: The grinding and polishing assembly also includes a receiving plate, a slide rail, and a driving component. The receiving plate is used to mount the scraped fuse contacts and is driven by a sliding assembly to abut against the abrasive belt for grinding. The driving component is used to drive the receiving plate to slide along the slide rail.

10. A groove forming device for fuse contacts as described in claim 1, characterized in that: It also includes a debris collection assembly, which includes a dust collection tank and a negative pressure suction nozzle. The dust collection tank is located on the movable platform and connected to the negative pressure suction nozzle, and is used to adsorb and collect metal debris generated by scraping.

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