Riveting and fastening tool for plastic part machining and method of riveting and fastening tool

Abstract

The invention relates to the technical field of pulling and riveting tools, in particular to a pulling and riveting fastening tool for plastic part machining and a method thereof.The pulling and riveting fastening tool comprises a supporting assembly and a hand riveter assembly, and the supporting assembly is provided with a fixing assembly used for clamping a plastic part; the fixing assembly comprises a rotating base, two side plates symmetrically arranged on the rotating base front and back, a plurality of connecting structures arranged on the inner sides of the side plates, clamping jaw structures arranged on the outer side walls of the connecting structures and a driving structure used for driving the clamping jaw structures. According to the tool, different parts are synchronously fastened by arranging the clamping jaw structure, meanwhile, the clamping position can be adjusted according to different overlapping positions of the parts with different sizes, and the situation of unstable clamping is avoided; in addition, by arranging a dismounting structure, when the plate-shaped part is clamped, the clamping jaw can be taken down only by pressing the pressing plate, and the clamping plate is left for clamping.

Description

Technical Field

[0001] The invention belongs to the technical field of rivet tools, and in particular relates to a rivet fastening tool for processing plastic parts and a method thereof. Background Art

[0002] Riveting is a commonly used fastening method. Generally, one end of the rivet is stretched and deformed through a rivet gun to clamp the parts and fix the connection. It is usually used for connecting metal to metal, plastic to metal, and plastic to plastic, and has a wide range of applications.

[0003] For example, the invention application with publication number CN115740339A discloses a riveting and pressing riveting device in the field of riveting equipment technology, which includes a riveting mechanism, a pressing riveting mechanism, a clamp mechanism for clamping the product to be riveted, and a clamp slide. The pressing riveting mechanism and the riveting mechanism are respectively located above and below the clamp switching station and are staggered. The clamp slide is used to drive the product to move to the pressing riveting position below the pressing riveting mechanism or to the riveting position above the riveting mechanism.

[0004] Combining the above cases with actual conditions, we discovered the following problem: When existing riveting devices are used to tighten cylindrical parts, the fixture usually corresponds to the part. Since different parts have different sizes and overlapping parts when tightened, if the clamping point of the fixture is fixed, it is easy for shorter cylindrical parts to lose contact with the fixture, which in turn causes the part to shift and tilt during riveting, reducing the tightening quality. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a rivet fastening tooling and method for plastic parts processing. By setting a clamping claw structure, the installation box can slide along the second rotating rod to drive the connecting structure and the clamping claw structure to adjust the position, so that the left half of the clamping claw clamps the cylindrical parts with larger diameters, and the right half of the clamping claw clamps the cylindrical parts with smaller diameters, thereby avoiding unstable clamping and improving the clamping quality.

[0006] To achieve the above-mentioned objectives, the present invention provides a rivet fastening tool for processing plastic parts, comprising a support assembly and a rivet gun assembly. The support assembly is provided with a fixing assembly for clamping the plastic part, the fixing assembly comprising a plurality of connecting structures provided on the inner sides of side panels, a clamping claw structure provided on the outer side walls of the connecting structures, and a driving structure for driving the clamping claw structure. The clamping claw structure includes two upper and lower clamping plates and a clamping claw located on the inner side of the clamping plate, the lower clamping plate is fixed to the connecting structure, and the upper and lower outer sides of the clamping claw are respectively fixed with an upper extension plate and a lower extension plate, the outer side of the upper extension plate is provided with an upper connecting plate, the outer side of the lower extension plate is provided with a lower connecting plate, the upper extension plate is provided with an arc groove running through the left and right, the inner end of the upper connecting plate is concave and a cross bar is fixed between the side walls of the inner end, and the cross bar is arranged in the corresponding arc groove; In this setting, when the clamping plate slides down, the cross bar will apply pressure to the groove surface of the arc groove, which will give the upper extension plate an inward component force, thereby pushing the upper extension plate and the clamping claw inward, allowing the clamping claw to clamp and fix.

[0007] The driving structure drives the clamping structure to clamp through a plurality of transmission structures. The driving structure includes two left and right second rotating rods and a plurality of purlins regularly arranged on the outer surface of the second rotating rods. The plurality of transmission structures correspond to the plurality of clamping structures one by one. A bent plate is fixed to the outer end of the upper clamping plate. The threaded rod passes through the corresponding bent plate and the two are threadedly connected. In this arrangement, the purlins and purlin grooves are provided so that the second rotating rod can drive the worm gear to rotate, and the worm gear can slide along the second rotating rod to adjust its position to adapt to the different overlapping positions of different parts when tightened.

[0008] In the technical solution of the present invention, the support assembly includes a processing table and a bracket fixed on the processing table. A control console for controlling the rivet gun assembly and the fixed assembly is fixed to the upper left corner of the right side wall of the bracket. The rotating seat is rotatably connected to the processing table. A first motor is fixed below the middle of the processing table surface, and the output shaft of the first motor is fixed to the right end of the bottom surface of the rotating seat.

[0009] In this arrangement, the rotating seat is driven to rotate by the first motor so that the fixing parts and the fastening parts are not in the same position, which facilitates fixation and avoids obstruction by the rivet gun assembly.

[0010] In the technical solution of the present invention, the processing table includes a rotating seat and two side plates symmetrically arranged on the rotating seat in the front and back directions. The driving structure includes a second motor fixed to the left end of the rotating seat and two first rotating rods arranged on the left and right sides of the second motor output shaft. The second motor output shaft and the two first rotating rods are connected by a first gear set, and the first rotating rod and the corresponding second rotating rod are connected by a second gear set.

[0011] In this configuration, the second motor drives the first rotating rod to rotate via the first gear set, thereby driving the second rotating rod to rotate.

[0012] In the technical solution of the present invention, the transmission structure includes a worm wheel and a worm that are meshed with each other, and a threaded rod whose top end is coaxially fixed to the bottom end of the worm, the worm wheel is coaxially sleeved on the second rotating rod, and the second rotating rod is provided with a plurality of mounting boxes corresponding to the worm wheel one by one, the inner side wall of the worm wheel is provided with a purlin groove that is compatible with the purlin, and the threaded rod is provided with a plurality of mounting boxes corresponding to the plurality of clamping structures one by one, and the same connecting box is fixedly connected between the two leftmost mounting boxes, the first rotating rod is arranged in the connecting box, the worm wheel and the corresponding worm are arranged in the corresponding mounting box, the second rotating rod passes through the plurality of mounting boxes and the right end of the second rotating rod is rotatably connected to the right side wall of the rightmost mounting box.

[0013] In the technical solution of the present invention, mounting rings are symmetrically fixed on the left and right sides of the worm wheel, the mounting rings are embedded in the corresponding side inner walls of the mounting box, and the mounting rings are rotatably connected to the inner walls of the mounting box, and the top end of the worm is embedded in the corresponding inner top surface of the mounting box, and the worm is rotatably connected to the corresponding inner top surface of the mounting box.

[0014] In this setting, a mounting ring is provided to fix the worm gear so that the worm gear can slide synchronously with the sliding of the mounting box, thereby preventing the worm gear from separating from the worm when adjusting the position, thereby preventing the entire device from being unusable.

[0015] In the technical solution of the present invention, the connecting structure includes a mounting tube and a connecting tube fixed to the outer end of the mounting tube, a movable groove is provided in the middle of the side panel, the connecting structures located at the left and right ends are fixed on the corresponding side panels, and the remaining connecting structures are arranged in the movable groove, and the outer wall of the mounting tube located in the movable groove is symmetrically fixed with blocks, and the upper and lower inner walls of the movable groove are provided with block grooves adapted to the blocks, the connecting tube is located on the outer side of the corresponding side panel, the mounting box is fixed above the connecting tube, and a fixing plate is fixed between the middle parts of the front and rear sides corresponding to the mounting boxes, the bottom end of the worm passes through the corresponding bottom surface of the mounting box and the corresponding top surface of the connecting tube in turn and extends into the corresponding connecting tube, the threaded rod is arranged in the connecting tube, and the bottom end of the threaded rod is rotatably connected to the inner bottom surface of the corresponding connecting tube.

[0016] In this setting, the middle connecting structure can slide left and right along the movable groove, thereby adapting to the different overlapping positions of different parts, thereby improving the scope of application. By setting a fixed plate, the corresponding installation boxes on both sides are located in the same position, thereby ensuring that the clamping claws on both sides will not be misaligned and unable to clamp.

[0017] In the technical solution of the present invention, the outer end of the lower clamping plate is fixed on the inner wall of the corresponding mounting tube, and the bending plate is located in the corresponding connecting tube. Both the connecting tube and the mounting tube have gaps for the bending plate to slide up and down.

[0018] In the technical solution of the present invention, a slot is provided on the inner end surface of the splint, and the outer ends of the upper connecting plate and the lower connecting plate are fixed with plug-in plates. A number of regularly distributed latches are symmetrically provided on the left and right sides of the plug-in plate, and the latches are slidably connected to the side walls of the plug-in plate. The left and right side walls of the slot are provided with latch grooves corresponding to the latches, and the inner end of the latch is provided with a first spring. The diameter of the latch gradually increases from the inner side to the outer side. A limiting groove is provided in the lower extension plate, and the inner end of the lower connecting plate extends into the limiting groove and the two are slidably connected.

[0019] In this configuration, the clamping plate is respectively plugged and fixed to the upper connecting plate and the lower connecting plate by providing a clamping bolt and a clamping bolt slot.

[0020] In the technical solution of the present invention, a disassembly structure is provided outside the splint and above the slot, and the disassembly structure includes a pressing plate, a number of regularly distributed pressure rods and a push column, and the push column is located in the corresponding bolt slot, and protruding flanges are fixed on both sides of the push column. The outer wall of the push column is provided with an upward pressure groove, and the bottom end of the pressure rod passes through the top surface of the corresponding bolt slot and extends into the corresponding pressure groove. The bottom surface of the pressure groove is inclined with the inner side higher and the outer side lower, and a second spring is provided between the push column and the bolt slot.

[0021] In this setting, when the pressure rod is pressed down, it can give the pressure groove an outward thrust to push the push column out. A second spring is provided between the push column and the bolt groove. When the clamping claw needs to be removed, the pressing plate is pressed, so that the pressure rod pushes the push column outward under the action of the pressure groove and pushes the bolt out of the bolt groove, making disassembly convenient.

[0022] On the other hand, the present invention also provides a rivet fastening method for processing plastic parts, which uses the above-mentioned rivet fastening tool for processing plastic parts, comprising the following steps: S1. When tightening a cylindrical plastic part, place the part with the larger diameter on the left and the part with the smaller diameter on the right. Then adjust the movable connecting structures on both sides so that they slide along the second rotating rod to clamp the overlapping part of the two parts. S2. After proper adjustment, start the second motor to drive the first rotating rod to rotate through the first gear set, and then drive the second rotating rod to rotate. The second rotating rod drives the worm wheel to rotate under the action of the purlin, and the worm drives the threaded rod to rotate, and then drives the bending plate to slide down; S3. When the bending plate slides down, the crossbar pushes the upper extension plate and the clamping claws inward under the action of the arc groove, so that the corresponding clamping claws on both sides clamp and fix the two parts; S4. After the fixation is completed, start the first motor to drive the rotating seat to rotate 180 degrees, then place the rivet bolt at the reserved opening, and then start the rivet gun assembly to rivet and tighten; S5. When processing plate-shaped parts, press the pressing plate so that the pressing rod pushes the push column outward under the action of the pressing groove and pushes the clamping bolt out of the clamping bolt groove, so that the clamping claw part can be removed and only the clamping plate is left. Then repeat steps S2 and S4 to fix it.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by providing a clamping structure, when tightening the cylindrical part, the installation box is pushed to slide along the second rotating rod, thereby driving the connecting structure and the clamping structure to adjust the position, and then starting the second motor to drive the first rotating rod to rotate through the first gear set, and then driving the second rotating rod to rotate. The second rotating rod drives the worm gear to rotate under the action of the purlin, and the worm drives the threaded rod to rotate, thereby driving the bending plate to slide down and driving the cross bar to slide down. Under the action of the arc groove, the cross bar pushes the upper extension plate and the clamping claw inward, so that the left half of the clamping claw clamps the cylindrical part with a larger diameter, and the right half of the clamping claw clamps the cylindrical part with a smaller diameter, thereby avoiding unstable clamping and improving the clamping quality.

[0024] 2. In the present invention, by setting up a disassembly structure, when tightening the plate-like parts, the pressing plate is pressed, so that the pressure rod pushes the push column outward under the action of the pressure groove and pushes the bolt out of the bolt groove, and the clamping claw part can be removed and only the clamping plate is left. Under the action of the driving structure, the plate-like parts can still be clamped, thereby improving the applicability of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 Schematic diagram of the fixing assembly in the present invention; Figure 4 It is a cross-sectional view of the driving structure in the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 Schematic diagram of the transmission structure of the present invention; Figure 7 Schematic diagram of the worm gear in the present invention; Figure 8 It is a cross-sectional view of the connection structure in the present invention; Figure 9 Schematic diagram of the clamping jaw structure in the present invention; Figure 10 For the present invention Figure 9 Enlarged view of point B in the middle; Figure 11 This is an exploded view of the clamping structure of the present invention; Figure 12 A cross-sectional view of the clamping jaws of the present invention; Figure 13 It is a partial cross-section of the inserting plate in the present invention; Figure 14 It is a schematic diagram of the side panel in the present invention; Description of reference numerals: 100. Support assembly; 101. Processing table; 102. Bracket; 103. Control console; 200, fixed assembly; 201, rotating seat; 202, first motor; 203, side plate; 204, movable slot; 205, block slot; 210, drive structure; 211, second motor; 212, first rotating rod; 213, first gear set; 214, second rotating rod; 215, second gear set; 216, purlin; 220, transmission structure; 221, connecting box; 222, mounting box; 223, worm gear; 224, mounting ring; 225, worm; 226, purlin slot; 227, threaded rod; 228, fixed plate; 230, connecting Structure; 231, mounting tube; 232, connecting tube; 233, clamping block; 240, clamping claw structure; 241, clamping plate; 242, clamping claw; 243, upper extension plate; 243a, arc groove; 244, upper connecting plate; 245, lower extension plate; 245a, limiting groove; 246, lower connecting plate; 247, bending plate; 248, inserting plate; 248a, latch; 248b, first spring; 249, crossbar; 250, disassembly structure; 251, pressing plate; 252, pressing rod; 253, pushing column; 254, pressing groove; 255, second spring; 300. Rivet gun assembly. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0027] Unless expressly stated otherwise, throughout the specification, the term “comprise” or variations thereof such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0028] Reference Figures 1-14 As shown, this embodiment provides a technical solution: A rivet fastening tool for processing plastic parts includes a support assembly 100 and a rivet gun assembly 300. The rivet gun assembly 300 consists of a rivet gun and X- and Y-axis drive devices. The drive devices can be electromagnetically driven or hydraulically driven. This is a prior art and will not be described in detail here. The support assembly 100 is provided with a fixing assembly 200 for clamping the plastic part. The fixing assembly 200 includes a plurality of connection structures 230, a clamping claw structure 240 provided on the outer wall of the connection structure 230, and a drive structure 210 for driving the clamping claw structure 240. The clamping structure 240 includes two upper and lower clamping plates 241 and a clamping plate 242 located on the inner side of the clamping plate 241. The clamping surfaces of the clamping plate 241 and the clamping plate 242 are bonded with rubber anti-slip pads. The diameter of the left half of the clamping plate 242 is larger than that of the right half of the clamping plate 242. The centers of all the clamping plates 242 are located on the same straight line. The lower clamping plate 241 is welded and fixed to the connecting structure 230. The upper extension plate 243 and the lower extension plate 245 are welded and fixed to the outer side of the clamping plate 242 respectively. The outer side of the upper extension plate 243 is connected to the upper clamping plate 241 by setting an upper connecting plate 244. The lower extension plate 245 is welded and fixed to the outer side of the clamping plate 230. The lower connecting plate 246 on the outer side of the upper connecting plate 244 is connected to the lower clamping plate 241 by sliding connection. The upper extension plate 243 is provided with an arc-shaped groove 243a running through the left and right sides. The inner end of the upper connecting plate 244 is concave and a cross bar 249 is fixed between the inner end side walls. The cross bar 249 is set in the corresponding arc-shaped groove 243a. When the clamping plate 241 slides down, the cross bar 249 will exert pressure on the groove surface of the arc-shaped groove 243a. This pressure will exert an inward component force on the upper extension plate 243, thereby pushing the upper extension plate 243 and the clamping claw 242 inward, so that the clamping claw 242 can clamp and fix. It should be noted that the position of the lower clamping plate 241 at the left end is higher than the position of the lower clamping plate 241 in the middle, and the position of the upper clamping plate 241 at the right end is lower than the position of the lower clamping plate 241 in the middle. When clamping the plate-like parts, the two parts are overlapped up and down. By using the different positions of the clamping plates 241, the two parts can be clamped synchronously without being tilted by the action of the clamping plates 241, or the clamping plates 241 at both ends cannot contact the parts.

[0029] The driving structure 210 drives the clamping structure 240 to clamp through a number of transmission structures 220. The driving structure 210 includes two left and right second rotating rods 214 and a number of purlins 216 regularly arranged on the outer surface of the second rotating rods 214. The several transmission structures 220 correspond one-to-one to the several clamping structures 240. A bending plate 247 is fixed to the outer end of the upper clamping plate 241. The driving structure 210 drives the bending plate 247 to slide up and down under the action of the transmission structure 220.

[0030] See also Figure 1-Figure 3As shown, the support assembly 100 includes a processing table 101 and a bracket 102 fixed on the processing table 101. A control console 103 for controlling the rivet gun assembly 300 and the fixing assembly 200 is fixed to the upper left corner of the right side wall of the bracket 102. The rotating seat 201 is rotatably connected to the processing table 101. A first motor 202 is fixed below the middle of the table top of the processing table 101. The output shaft of the first motor 202 is fixed to the right end of the bottom surface of the rotating seat 201. The rotating seat 201 is driven to rotate by the first motor 202, so that the fixing parts and the fastening parts are not in the same position, which is convenient for fixation and avoids obstruction by the rivet gun assembly 300.

[0031] See also Figure 3-Figure 4 As shown, the processing table 101 includes a rotating base 201 and two side plates 203 symmetrically arranged on the rotating base 201 in the front and back directions. The driving structure 210 includes a second motor 211 fixed to the left end of the rotating base 201 and two first rotating rods 212 arranged on the left and right sides of the output shaft of the second motor 211. The output shaft of the second motor 211 and the two first rotating rods 212 are connected by a first gear set 213. The first rotating rod 212 and the corresponding second rotating rod 214 are connected by a second gear set 215. The second motor 211 drives the first rotating rod 212 to rotate through the first gear set 213, and then drives the second rotating rod 214 to rotate. The first gear set 213 is composed of three bevel gears meshing with each other, and the second gear set 215 is composed of two gear sets meshing with each other.

[0032] See also Figure 4As shown, the transmission structure 220 includes a worm gear 223 and a worm 225 that mesh with each other, and a threaded rod 227 whose top end is coaxially fixed to the bottom end of the worm 225. The worm gear 223 is coaxially sleeved on the second rotating rod 214. The second rotating rod 214 is provided with a plurality of mounting boxes 222 that correspond one-to-one to the worm gear 223. The inner wall of the worm gear 223 is provided with a purlin groove 226 that matches the purlin 216. By providing the purlin 216 and the purlin groove 226, the second rotating rod 214 can drive the worm gear 223 to rotate. At the same time, the worm gear 223 can slide along the second rotating rod 214 to adjust its position to adapt to the different overlapping positions of different parts when tightened. The threaded rod 227 is provided with a plurality of mounting boxes 222 that correspond one-to-one to the plurality of clamping structures 240. The two leftmost mounting boxes 222 are welded and fixedly connected with the same connecting box 221. The outer end of the first rotating rod 212 is rotatably connected to the inner wall of the corresponding side of the connecting box 221. The first rotating rod 212 is arranged in the connecting box 221. The worm gear 223 and the corresponding worm 225 are arranged in the corresponding mounting box 222. The second rotating rod 214 passes through several mounting boxes 222 and the right end of the second rotating rod 214 is rotatably connected to the right side wall of the rightmost mounting box 222. The left and right sides of the worm gear 223 are symmetrically welded and fixed with mounting rings 224. The mounting rings 224 are embedded in the corresponding side inner walls of the corresponding mounting box 222 and the mounting rings 224 are rotatably connected to the inner wall of the mounting box 222. The worm gear 223 is fixed by providing the mounting ring 224 so that the worm gear 223 can slide synchronously with the sliding of the mounting box 222. The top of the worm 225 is embedded in the inner top surface of the corresponding mounting box 222 and the worm 225 is rotatably connected to the inner top surface of the corresponding mounting box 222.

[0033] See also Figure 4-Figure 8 as well as Figure 14 As shown, the connecting structure 230 includes a mounting tube 231 and a connecting tube 232 fixed to the outer end of the mounting tube 231. A movable groove 204 is provided in the middle of the side panel 203. The connecting structures 230 at the left and right ends are fixed on the corresponding side panels 203. The remaining connecting structures 230 are arranged in the movable groove 204. The outer wall of the mounting tube 231 in the movable groove 204 is symmetrically fixed with blocks 233. The upper and lower inner walls of the movable groove 204 are provided with block grooves 205 that are compatible with the blocks 233, so that the middle connecting structure 230 can slide left and right along the movable groove 204, thereby adapting to the different overlapping positions of different parts, thereby improving the scope of application.

[0034] Furthermore, the connecting tube 232 is located on the outside of the corresponding side plate 203, the installation box 222 is fixed above the connecting tube 232, and a fixing plate 228 is welded and fixed between the corresponding installation boxes 222 in the middle of the front and rear sides. By setting the fixing plate 228, the corresponding installation boxes 222 on both sides are located in the same position, thereby ensuring that the clamping claws 242 on both sides will not be misplaced and unable to clamp. The bottom end of the worm 225 passes through the bottom surface of the corresponding installation box 222 and the top surface of the corresponding connecting tube 232 in turn and extends into the corresponding connecting tube 232. The threaded rod 227 is set in the connecting tube 232, and the bottom end of the threaded rod 227 is rotatably connected to the inner bottom surface of the corresponding connecting tube 232.

[0035] See also Figures 9-13 As shown, the outer end of the lower clamping plate 241 is fixed on the inner wall of the corresponding mounting tube 231, and the bending plate 247 is located in the corresponding connecting tube 232. There are gaps in the connecting tube 232 and the mounting tube 231 for the bending plate 247 to slide up and down, and there is an opening on the inner end surface of the mounting tube 231 for the bending plate 247 to slide up and down.

[0036] Furthermore, a slot is provided on the inner end surface of the splint 241, and an inserting plate 248 is fixed to the outer ends of the upper connecting plate 244 and the lower connecting plate 246. A plurality of regularly distributed latches 248a are symmetrically provided on the left and right sides of the inserting plate 248. The latches 248a are slidably connected to the side walls of the inserting plate 248. The left and right side walls of the slot are provided with latch grooves corresponding to the latches 248a. A first spring 248b is provided on the inner end of the latch 248a. The first spring 248b can push the latch 248a outward. A limit plate is welded to the inner end of the latch 248a. The middle of the limit plate Outward extension plates are symmetrically provided at the front and rear ends to prevent the latch 248a from rotating or detaching from the plug plate 248. At the same time, the side of the latch 248a facing the clamping plate 241 is an inclined surface to prevent the latch 248a from blocking the plug plate 248 from entering the plug plate slot. The diameter of the latch 248a gradually increases from the inside to the outside to prevent the latch 248a that enters first from directly entering the latch slot, resulting in the entire plug plate 248 being unable to enter the plug plate slot. A limiting groove 245a is provided in the lower extension plate 245, and the inner end of the lower connecting plate 246 extends into the limiting groove 245a and the two are slidably connected.

[0037] When the clamping jaws 242 need to be disassembled, the pressing plate 251 is pressed, so that the pressing rod 252 pushes the push column 253 outward under the action of the pressing groove 254, and the bolt 248a is pushed out of the bolt slot.

[0038] The present invention also provides a rivet fastening method for processing plastic parts, which uses the above-mentioned rivet fastening tool for processing plastic parts, comprising the following steps: S1. When tightening cylindrical plastic parts, place the part with a larger diameter on the left and the part with a smaller diameter on the right. Then adjust the movable connecting structures 230 on both sides so that they slide along the second rotating rod 214 to clamp the overlapping part of the two parts. S2. After proper adjustment, start the second motor 211 to rotate the first rotating rod 212 through the first gear set 213, thereby rotating the second rotating rod 214. The second rotating rod 214, under the action of the purlin 216, rotates the worm gear 223, causing the worm 225 to rotate the threaded rod 227, thereby driving the bending plate 247 downward. S3. When the bending plate 247 slides downward, the crossbar 249 pushes the upper extension plate 243 and the clamping claws 242 inward under the action of the arc-shaped groove 243a, so that the corresponding clamping claws 242 on both sides clamp and fix the two parts; S4. After the fixing is completed, the first motor 202 is started to drive the rotating seat 201 to rotate 180 degrees, and then the rivet bolt is placed at the reserved opening, and then the rivet gun assembly 300 is started to rivet and tighten.

[0039] S5. When processing plate-like parts, press the pressing plate 251 so that the pressing rod 252 pushes the push column 253 outward under the action of the pressing groove 254, and pushes the latch 248a out of the latch groove, so that the clamping claw 242 can be partially removed and only the clamping plate 241 is left. Then repeat steps S2 and S4 to fix it.

[0040] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to make and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the description and its equivalents.

Claims

1. A rivet fastening tool for processing plastic parts, comprising a support assembly and a rivet gun assembly, characterized in that: The support assembly is provided with a fixing assembly for clamping the plastic part, and the fixing assembly includes a plurality of connecting structures arranged on the inner side of the side plate, a clamping claw structure arranged on the outer side wall of the connecting structure, and a driving structure for driving the clamping claw structure; The clamping claw structure includes two upper and lower clamping plates and a clamping claw located on the inner side of the clamping plate, the lower clamping plate is fixed to the connecting structure, and the upper and lower outer sides of the clamping claw are respectively fixed with an upper extension plate and a lower extension plate, the outer side of the upper extension plate is provided with an upper connecting plate, the outer side of the lower extension plate is provided with a lower connecting plate, the upper extension plate is provided with an arc groove running through the left and right, the inner end of the upper connecting plate is concave and a cross bar is fixed between the side walls of the inner end, and the cross bar is arranged in the corresponding arc groove; The driving structure drives the clamping structure to clamp through several transmission structures. The driving structure includes two left and right second rotating rods and several purlins regularly arranged on the outer surface of the second rotating rods. Several of the transmission structures correspond one to one with several of the clamping structures, and a bent plate is fixed to the outer end of the upper clamping plate.

2. The rivet fastening tool for plastic parts processing according to claim 1, characterized in that: The support assembly includes a processing table and a bracket fixed on the processing table. A console for controlling the rivet gun assembly and the fixing assembly is fixed to the upper left corner of the right side wall of the bracket, and a first motor is fixed below the middle of the processing table surface.

3. The rivet fastening tool for plastic parts processing according to claim 2, characterized in that: The processing table is provided with a rotating seat and two side plates symmetrically arranged on the rotating seat in front and back. The output shaft of the first motor is fixed to the bottom surface of the rotating seat near the right end. The driving structure includes a second motor fixed to the left end of the rotating seat and two first rotating rods arranged on the left and right sides of the second motor output shaft. The second motor output shaft and the two first rotating rods are connected by a first gear set, and the first rotating rod and the corresponding second rotating rod are connected by a second gear set.

4. The rivet fastening tool for plastic parts processing according to claim 3, characterized in that: The transmission structure includes a worm wheel and a worm that mesh with each other, and a threaded rod whose top end is coaxially fixed to the bottom end of the worm, the threaded rod passes through the corresponding bent plate and the two are threadedly connected, the worm wheel is coaxially sleeved on the second rotating rod, and the second rotating rod is provided with a plurality of mounting boxes that correspond one to one to the worm wheel, and the inner side wall of the worm wheel is provided with a purlin groove that matches the purlin, and the same connecting box is fixedly connected between the two leftmost mounting boxes, the first rotating rod is arranged in the connecting box, the worm wheel and the corresponding worm are arranged in the corresponding mounting box, the second rotating rod passes through the plurality of mounting boxes and the right end of the second rotating rod is rotatably connected to the right side wall of the rightmost mounting box.

5. The rivet fastening tool for plastic parts processing according to claim 4, characterized in that: The worm wheel is symmetrically fixed with mounting rings on the left and right sides. The mounting rings are embedded in the corresponding side inner walls of the mounting box and the mounting rings are rotatably connected to the inner walls of the mounting box. The top end of the worm is embedded in the corresponding inner top surface of the mounting box and the worm is rotatably connected to the corresponding inner top surface of the mounting box.

6. The rivet fastening tool for plastic parts processing according to claim 5, characterized in that: The connecting structure includes a mounting tube and a connecting tube fixed to the outer end of the mounting tube, a movable groove is provided in the middle of the side panel, the connecting structures located at the left and right ends are fixed to the corresponding side panels, and the remaining connecting structures are arranged in the movable groove, and the outer wall of the mounting tube located in the movable groove is symmetrically fixed with blocks, and the upper and lower inner walls of the movable groove are provided with block grooves adapted to the blocks. The connecting tube is located at the outer side of the corresponding side panel, and the mounting box is fixed above the connecting tube, and a fixing plate is fixed between the middle parts of the front and rear sides corresponding to the mounting boxes, the bottom end of the worm passes through the corresponding bottom surface of the mounting box and the corresponding top surface of the connecting tube in turn and extends into the corresponding connecting tube, the threaded rod is arranged in the connecting tube, and the bottom end of the threaded rod is rotatably connected to the inner bottom surface of the corresponding connecting tube.

7. The rivet fastening tool for plastic parts processing according to claim 6, characterized in that: The outer end of the lower clamping plate is fixed on the inner side wall of the corresponding installation tube, and the bending plate is located in the corresponding connecting tube. Gaps are left in the connecting tube and the installation tube for the bending plate to slide up and down.

8. The rivet fastening tool for plastic parts processing according to claim 7, characterized in that: A slot is provided on the inner end surface of the splint, and an inserting plate is fixed to the outer ends of the upper connecting plate and the lower connecting plate. A number of regularly distributed latches are symmetrically provided on the left and right sides of the inserting plate, and the latches are slidably connected to the side walls of the inserting plate. The left and right side walls of the slot are provided with latch grooves corresponding to the latches, and a first spring is provided on the inner end of the latch, and the diameter of the latch gradually increases from the inner side to the outer side. A limiting groove is provided in the lower extension plate, and the inner end of the lower connecting plate extends into the limiting groove and the two are slidably connected.

9. The rivet fastening tool for plastic parts processing according to claim 8, characterized in that: A disassembly structure is provided outside the splint and above the slot, and the disassembly structure includes a pressing plate, a number of regularly distributed pressure rods and a push column. The push column is located in the corresponding bolt slot, and outward-extending flanges are fixed on both sides of the push column. An upward-facing pressure groove is provided on the outer wall of the push column, and the bottom end of the pressure rod passes through the top surface of the corresponding bolt slot and extends into the corresponding pressure groove. The bottom surface of the pressure groove is inclined with the inner side higher and the outer side lower, and a second spring is provided between the push column and the bolt slot.

10. A rivet fastening method for processing plastic parts, using the rivet fastening tool for processing plastic parts according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When tightening a cylindrical plastic part, place the part with the larger diameter on the left and the part with the smaller diameter on the right. Then adjust the movable connecting structures on both sides so that they slide along the second rotating rod to clamp the overlapping part of the two parts. S2. After proper adjustment, start the second motor to drive the first rotating rod to rotate through the first gear set, and then drive the second rotating rod to rotate. The second rotating rod drives the worm wheel to rotate under the action of the purlin, and the worm drives the threaded rod to rotate, and then drives the bending plate to slide down; S3. When the bending plate slides down, the crossbar pushes the upper extension plate and the clamping claws inward under the action of the arc groove, so that the corresponding clamping claws on both sides clamp and fix the two parts; S4. After the fixation is completed, start the first motor to drive the rotating seat to rotate 180 degrees, then place the rivet bolt at the reserved opening, and then start the rivet gun assembly to rivet and tighten; S5. When processing plate-shaped parts, press the pressing plate so that the pressing rod pushes the push column outward under the action of the pressing groove and pushes the clamping bolt out of the clamping bolt groove, so that the clamping claw part can be removed and only the clamping plate is left. Then repeat steps S2 and S4 to fix it.

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