Polishing device for exhaust pipe

Abstract

The invention discloses a polishing device for an exhaust pipe. The polishing device comprises a polishing table, positioning mechanisms, clamping mechanisms and a middle polishing mechanism, wherein the positioning mechanisms, the clamping mechanisms and the middle polishing mechanism are symmetrically arranged. The positioning mechanism limits the axial displacement of the small end of the tail throat pipe through a positioning shaft shoulder, and a V-shaped positioning plate is driven by a double-shaft air cylinder to jack the large end so that the large end can be in a preset inclined posture. And the hydraulic cylinder drives the positioning seats on the two sides to move oppositely through the connecting rod mechanism, so that the large-end inclined surfaces of the two tail throat pipes are tightly propped against and centered. In the moving process, a composite guide structure with a spiral groove matched with a linear groove can actively adjust the circumferential angle of the pipe body, and then the clamping mechanism tightly supports the inner wall in a self-centering mode. During grinding, the servo motors on the two sides synchronously drive the double pipes to rotate, the rodless air cylinder and the double-shaft air cylinder cooperatively control the grinding belt to be fed in the axial direction and attached to the outer contour in a profiling mode, and continuous, full-coverage and uniform grinding of the outer surfaces of the two suspended butt joint tail throat pipes is achieved. The method is particularly suitable for batch efficient accurate grinding of the exhaust tail throat pipes, and the surface quality and the production consistency are remarkably improved.

Description

A grinding device for exhaust pipes Technical Field

[0001] This invention relates to the technical field of machining, and specifically to a grinding device for exhaust pipes. Background Technology

[0002] In the manufacturing of automotive exhaust systems, the exhaust tailpipe typically has a small end for welding on one end and a large end with a specific angled cut (i.e., the exhaust outlet) on the other. This large end is often suspended in the air, and its surface quality directly affects the overall vehicle appearance and airflow performance.

[0003] Traditional grinding processes often involve manual handheld belt sanders or fixed single-station equipment to process individual tailpipes one by one, resulting in low efficiency, poor consistency, and difficulty in covering beveled and transitional curved surfaces. Because there is no reliable support at either end, and the posture is unstable and inconsistent, grinding misalignment, contour distortion, or localized over-grinding are highly likely to occur.

[0004] While existing automated equipment can perform rotary grinding, it lacks the integrated capabilities for dual-tube synchronous clamping, automatic centering, active spatial posture adjustment, and multi-degree-of-freedom contour grinding, thus failing to meet the demands for high-precision, high-efficiency, and high-quality mass production.

[0005] Therefore, there is an urgent need for a specialized device that can stably clamp, accurately align, and simultaneously grind the two suspended inclined tail throat tubes. Summary of the Invention

[0006] The purpose of this invention is to provide a grinding device for exhaust pipes, solving the problem in the prior art of synchronously, stably, and with high precision grinding two exhaust tailpipes with suspended large-end bevels. This device integrates positioning, attitude adjustment, self-centering clamping, and multi-degree-of-freedom contour grinding functions, enabling continuous, full-coverage, and uniformly stressed automated grinding when the large-end bevels of the two pipes are in contact, significantly improving the surface treatment quality and production efficiency of irregularly shaped exhaust tailpipes.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a grinding device for an exhaust pipe, comprising: a grinding table; a pair of positioning mechanisms symmetrically arranged on the left and right sides of the grinding table, each positioning mechanism including a positioning seat and a motor connected thereto, the positioning seat having a positioning shoulder for engaging with the small end of the exhaust tailpipe to limit the axial displacement of the exhaust tailpipe; the motor driving the exhaust tailpipe to rotate uniformly around its own axis; and a pair of clamping mechanisms symmetrically arranged inside the two positioning seats, each clamping mechanism including a clamping bar and a planar linkage mechanism connected thereto, the planar linkage mechanism driving the clamping bar to radially clamp the inner side of the exhaust tailpipe. A wall is constructed to restrict the circumferential rotation of the exhaust tailpipe; a grinding mechanism located in the middle of the grinding table includes a rodless cylinder, a dual-axis cylinder II, a motor II, and a grinding belt. The rodless cylinder drives the grinding belt to move axially along the exhaust tailpipe; the dual-axis cylinder II drives the grinding belt to move along the outer contour line of the exhaust tailpipe; the motor II drives the grinding belt to rotate at high speed. When a pair of exhaust tailpipes are coaxially aligned and their large-end inclined surfaces abut against each other, the two exhaust tailpipes are simultaneously driven to rotate by the motors on both sides. At the same time, under the cooperative control of the rodless cylinder and the dual-axis cylinder II, the outer surfaces of the two exhaust tailpipes are continuously and fully covered by grinding.

[0008] Preferably, a pair of linear guide rails are fixed parallel to each other on the upper side of the grinding table, and a slider is slidably fitted on each linear guide rail. The top of the two sliders are connected to a slide plate. A mounting plate is vertically fixed on the upper side of the slide plate. A mounting tube is rotatably supported on the upper part of the mounting plate. The positioning seat is coaxially fixed to the inner end of the mounting tube. A motor is mounted on the mounting plate through a motor base. A pulley is mounted on its output shaft. A pulley is mounted on the outer end of the mounting tube. The pulley is connected to the pulley via a transmission belt.

[0009] Furthermore, the lower side of the grinding table is horizontally connected to a connecting plate via multiple connecting rods. A hydraulic cylinder is installed at the center of the connecting plate. The piston rod of the hydraulic cylinder extends upward and is connected to a hinge seat one. The lower sides of the two sliding plates one are respectively provided with hinge seats two. Each hinge seat two is hinged to the hinge seat one via a hinge strip.

[0010] Furthermore, a mounting bracket is connected to the lower side of the slide plate, and a dual-axis cylinder is vertically mounted on the inner side of the mounting bracket. The piston rod of the dual-axis cylinder extends upward and is connected to a V-shaped positioning plate. The inclined surface of the positioning plate cooperates with the inclined surface of the large end of the exhaust tailpipe to make the inclined surface of the large end of the axially positioned exhaust tailpipe in a downward tilted position.

[0011] Furthermore, the first motor is a servo motor or a stepper motor, the first pulley and the second pulley are synchronous pulleys, and the transmission belt is a synchronous belt.

[0012] Preferably, a connecting ring 1 is coaxially fixed to the inner end of the positioning seat. The connecting ring 1 has a plurality of connecting lugs 1 evenly distributed circumferentially. A connecting ring 2 is coaxially provided on the inner side of the connecting ring 1. The connecting ring 2 has a plurality of connecting lugs 2 evenly distributed circumferentially. A plurality of clamping bars are evenly arranged circumferentially between the connecting ring 1 and the connecting ring 2. A connecting piece is provided on the inner side of each clamping bar. The connecting piece is hinged to the corresponding connecting lug 1 by a pair of connecting bars 1 and to the corresponding connecting lug 2 by a pair of connecting bars 2. A plurality of compression springs 1 are evenly connected between the connecting ring 1 and the connecting ring 2.

[0013] Furthermore, the inner wall of the mounting tube is uniformly provided with multiple spiral grooves along the circumference, the center of the positioning seat is provided with a through hole with the same inner diameter as the mounting tube, the wall of the through hole is uniformly provided with multiple straight grooves along the circumference, each straight groove and the corresponding spiral groove are axially connected to form a composite guide channel, a fixing plate is vertically installed on the upper side of the grinding table, a telescopic rod is horizontally installed on the upper part of the fixing plate, the telescopic rod is coaxially arranged with the mounting tube, its telescopic end extends inward and is connected to a limit piece to limit the axial displacement of the connecting ring two, and multiple fixing blocks are uniformly provided along the circumference at the inner end of the cylinder of the telescopic rod, each fixing block is slidably engaged with the composite guide channel formed by the corresponding spiral groove and straight groove.

[0014] Preferably, the rodless cylinder is horizontally fixed to the upper side of the grinding table, and a sliding plate is vertically connected to the top of its slider. A pair of dual-axis cylinders are symmetrically fixed to the upper part of the sliding plate. The piston rods of the two dual-axis cylinders extend forward and are connected to a motor base. The motor is mounted on the side of the motor base, and a friction wheel is mounted on its output shaft. A support plate is vertically fixed to the front side of the motor base. Support rollers are rotatably supported at the upper and lower ends of the support plate. Support bars are hinged to the upper and lower sides of the support plate. Each support bar extends forward and rotatably supports a support roller at its extended end. A compression spring is provided between each support bar and the support plate. The grinding belt is tensioned and wound around the friction wheel, the two support rollers, and the two support rollers.

[0015] Furthermore, a pair of support frames are symmetrically connected to the lower side of the grinding table, and a pair of support legs are symmetrically connected to the lower side of the support frames.

[0016] Compared with the prior art, the present invention has the following advantages: 1. Achieve high-precision grinding of dual tubes synchronously: Through the coordinated action of the positioning mechanism, the V-shaped positioning plate and the hydraulic synchronous drive mechanism, the two suspended large-end inclined tail throat tubes are automatically aligned and closely abutted to form a stable "quasi-integral" structure, which effectively solves the technical problem of easy vibration and deformation in single-tube cantilever grinding.

[0017] 2. Uniform grinding force and excellent surface quality: Under the coordinated control of rodless cylinder and dual-axis cylinder, the grinding belt feeds axially and dynamically conforms to the outer contour of the two tubes. The pressure applied to the contact area of ​​the two tubes is evenly distributed, avoiding local over-grinding or under-grinding, and significantly improving the surface finish and contour consistency of the bevel.

[0018] 3. Integrated attitude adjustment and self-centering clamping: Utilizing a spiral groove-straight groove composite guiding mechanism, the circumferential angle of the tail throat tube is actively adjusted during the clamping process, and the inner wall is self-centering radially supported through a planar connecting rod clamping mechanism. This ensures that the thin-walled tube does not deform and that the rotation is stable, making it suitable for flexible production of various specifications of products. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall three-dimensional structure of the present invention.

[0020] Figure 2 is a schematic diagram of the overall front view of the present invention.

[0021] Figure 3 is a schematic diagram of the overall three-dimensional structure of the polishing table.

[0022] Figure 4 is a structural schematic diagram of the positioning mechanism from a first-person perspective.

[0023] Figure 5 is a structural schematic diagram of the positioning mechanism from a second perspective.

[0024] Figure 6 is a partial first-view structural schematic diagram of the positioning mechanism.

[0025] Figure 7 is a partial second-view structural schematic diagram of the positioning mechanism.

[0026] Figure 8 is a structural schematic diagram of the clamping mechanism from a first-person perspective.

[0027] Figure 9 is a structural schematic diagram of the clamping mechanism from a second perspective.

[0028] Figure 10 is a partial three-dimensional structural schematic diagram of the clamping mechanism.

[0029] Figure 11 is a schematic diagram of the overall three-dimensional structure of the grinding mechanism.

[0030] Figure 12 is a schematic diagram of the overall three-dimensional structure of the exhaust tailpipe.

[0031] Figure 13 is a schematic diagram of the changes in the spatial position and attitude of the exhaust tailpipe.

[0032] Wherein: 10-Grinding table; 101-Support frame; 102-Support foot; 20-Positioning mechanism; 201-Linear guide rail; 202-Slider; 203-Slide plate one; 204-Mounting plate; 205-Mounting tube; 205a-Helical groove; 206-Positioning seat; 206a-Positioning shoulder; 206b-Through hole; 206c-Linear groove; 207-Motor seat one; 208-Motor one; 209-Pulley one; 210-Pulley two; 211-Transmission belt; 212-Mounting bracket; 213-Dual-axis cylinder one; 214-Positioning plate; 215-Connecting rod; 216-Connecting plate; 217-Hydraulic cylinder; 218-Hinge seat one; 219-Hinge seat two; 220-Hinge strip.

[0033] 30-Clamping mechanism; 301-Connecting ring one; 302-Connecting ear one; 303-Connecting ring two; 304-Connecting ear two; 305-Clamping bar; 306-Connecting piece; 307-Connecting bar one; 308-Connecting bar two; 309-Compression spring one; 310-Fixing plate; 311-Telescopic rod; 312-Fixing block; 313-Limiting piece; 40-Grinding mechanism; 401-Rodless cylinder; 402-Slide plate two; 403-Dual-axis cylinder two; 404-Motor base two; 405-Motor two; 406-Friction wheel; 407-Support plate; 408-Support roller one; 409-Support bar; 410-Support roller two; 411-Compression spring two; 412-Grinding belt; 50-Exhaust tailpipe. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] As shown in Figures 1 to 13, this embodiment provides a grinding device for an exhaust pipe, including: a grinding table 10; a pair of positioning mechanisms 20 symmetrically arranged on the left and right sides of the grinding table 10, each positioning mechanism 20 including a positioning seat 206 and a motor 208 connected to it; the positioning seat 206 is provided with a positioning shoulder 206a for engaging with the small end of the exhaust tailpipe 50 to limit the axial displacement of the exhaust tailpipe 50; the motor 208 is used to drive the exhaust tailpipe 50 to rotate uniformly around its own axis; a pair of clamping mechanisms 30 symmetrically arranged inside the two positioning seats 206, each clamping mechanism 30 including a clamping bar 305 and a planar linkage mechanism connected to it; the planar linkage mechanism is used to drive the clamping bar 305 to radially brace against the inner wall of the exhaust tailpipe 50 to limit the exhaust tailpipe 50's axial displacement. The exhaust tailpipe 50 rotates circumferentially; the grinding mechanism 40 located in the middle of the grinding table 10 includes a rodless cylinder 401, a dual-axis cylinder 403, a motor 405, and a grinding belt 412. The rodless cylinder 401 drives the grinding belt 412 to move axially along the exhaust tailpipe 50; the dual-axis cylinder 403 drives the grinding belt 412 to move along the outer contour line of the exhaust tailpipe 50; the motor 405 drives the grinding belt 412 to rotate at high speed; wherein, when a pair of exhaust tailpipes 50 are coaxially aligned and their large end inclined surfaces abut against each other, the two exhaust tailpipes 50 are simultaneously driven to rotate by the two motors 208 on both sides, and under the cooperative control of the rodless cylinder 401 and the dual-axis cylinder 403, the outer surfaces of the two exhaust tailpipes 50 are continuously and fully covered by grinding. This structure, through the coordinated operation of positioning, clamping, and multi-degree-of-freedom grinding mechanisms, achieves automated, high-precision, and dead-angle-free grinding of the outer surface area of ​​irregularly shaped exhaust tailpipes, significantly improving the surface treatment quality and production efficiency of irregularly shaped exhaust tailpipes.

[0036] In this embodiment, a pair of linear guide rails 201 are fixed parallel to each other on the upper side of the grinding table 10. A slider 202 is slidably fitted onto each linear guide rail 201. The tops of the two sliders 202 are connected to a sliding plate 203. A mounting plate 204 is vertically fixed to the upper side of the sliding plate 203. A mounting tube 205 is rotatably supported on the upper part of the mounting plate 204. A positioning seat 206 is coaxially fixed to the inner end of the mounting tube 205. A motor 208 is mounted on the mounting plate 204 via a motor mount 207. A pulley 209 is mounted on its output shaft. A pulley 210 is mounted on the outer end of the mounting tube 205. The pulley 209 and pulley 210 are connected by a transmission belt 211. This modular installation structure ensures stable rotation of the positioning seat 206, facilitates maintenance and replacement, and the belt drive effectively isolates motor vibration, ensuring rotational stability and concentricity.

[0037] Furthermore, a connecting plate 216 is horizontally connected to the lower side of the grinding table 10 via multiple connecting rods 215. A hydraulic cylinder 217 is installed at the center of the connecting plate 216. The piston rod of the hydraulic cylinder 217 extends upward and is connected to a hinge seat 218. A second hinge seat 219 is provided on the lower side of each of the two sliding plates 203. Each second hinge seat 219 is hinged to the first hinge seat 218 via a hinge strip 220. This hydraulic-linkage synchronous drive mechanism can precisely control the synchronous movement of the two side positioning mechanisms 20 towards or away from each other. It can not only achieve automatic coaxial alignment of the two exhaust tailpipes 50 and close contact with the large end inclined surface to meet the process requirements of butt grinding, but also quickly separate the workpiece after grinding, improving the work cycle. At the same time, by adjusting the hydraulic stroke, it can adapt to exhaust tailpipes 50 of different lengths and specifications, significantly enhancing the versatility and changeover flexibility of the equipment.

[0038] Furthermore, a mounting bracket 212 is connected to the lower side of the slide plate 203. A dual-axis cylinder 213 is vertically mounted on the inner side of the mounting bracket 212. The piston rod of the dual-axis cylinder 213 extends upward and is connected to a V-shaped positioning plate 214. The inclined surface of the positioning plate 214 cooperates with the inclined surface of the large end of the exhaust tailpipe 50 to ensure that the inclined surface of the large end of the axially positioned exhaust tailpipe 50 is in a downward tilted position. By driving the V-shaped positioning plate 214 upward through the dual-axis cylinder 213, the large ends of the two exhaust tailpipes 50 are simultaneously adjusted to the preset downward tilted position, thereby ensuring that the inclined surfaces of the large ends of the two pipes are tightly fitted surface-to-surface when they are joined. This provides a stable geometric reference and reliable clamping consistency for the subsequent grinding mechanism 40 to perform uniform and continuous grinding on the joint area.

[0039] Furthermore, the motor 208 is a servo motor or a stepper motor, the pulley 209 and pulley 210 are synchronous pulleys, and the transmission belt 211 is a synchronous belt. Employing high-precision servo drive and synchronous belt transmission, the rotation speed and angle of the exhaust tailpipe 50 can be precisely controlled, meeting the cycle requirements of different materials and polishing processes, and improving polishing consistency.

[0040] In this embodiment, a connecting ring 301 is coaxially fixed to the inner end of the positioning seat 206. A plurality of connecting ears 302 are evenly distributed circumferentially on the connecting ring 301. A connecting ring 303 is coaxially provided on the inner side of the connecting ring 301. A plurality of connecting ears 304 are evenly distributed circumferentially on the connecting ring 303. A plurality of clamping bars 305 are evenly arranged circumferentially between the connecting ring 301 and the connecting ring 303. A connecting piece 306 is provided on the inner side of each clamping bar 305. The connecting piece 306 is hinged to the corresponding connecting ear 302 by a pair of connecting bars 307 and to the corresponding connecting ear 304 by a pair of connecting bars 308. A plurality of compression springs 309 are evenly connected between the connecting ring 301 and the connecting ring 303. The clamping mechanism 30 uses a planar linkage mechanism to achieve synchronous radial expansion and has a self-centering function. It can apply a uniform and symmetrical clamping force to the inner wall of the exhaust tailpipe 50, effectively preventing the thin-walled pipe from being crushed or elliptical deformed due to local stress. At the same time, the compression spring 309 stores elastic potential energy after the clamping action is completed, and automatically drives the linkage mechanism to reset when it is released, achieving rapid disengagement and improving clamping efficiency and ease of operation.

[0041] Furthermore, the inner wall of the mounting tube 205 is uniformly provided with a plurality of spiral grooves 205a along the circumference. The center of the positioning seat 206 is provided with a through hole 206b with the same inner diameter as the mounting tube 205. The wall of the through hole 206b is uniformly provided with a plurality of straight grooves 206c along the circumference. Each straight groove 206c and the corresponding spiral groove 205a are axially connected to form a composite guide channel. A fixing plate 310 is vertically installed on the upper side of the grinding table 10. A telescopic rod 311 is horizontally installed on the upper part of the fixing plate 310. The telescopic rod 311 is coaxially arranged with the mounting tube 205. Its telescopic end extends inward and is connected to a limiting piece 313 to limit the axial displacement of the connecting ring 303. The inner end of the cylinder of the telescopic rod 311 is uniformly provided with a plurality of fixing blocks 312 along the circumference. Each fixing block 312 is slidably engaged with the composite guide channel formed by the corresponding spiral groove 205a and straight groove 206c. When the fixed block 312 moves axially into the spiral groove 205a of the mounting tube 205, the inclined surface of the spiral groove 205a forces the mounting tube 205 to drive the positioning seat 206 and the positioned exhaust tailpipe 50 to rotate circumferentially, thereby achieving active adjustment of the spatial posture of the exhaust tailpipe 50. When the fixed block 312 continues to move forward and enters the straight groove 206c of the positioning seat 206, since the straight groove 206c has no circumferential component, the mounting tube 205 and the positioning seat 206 will maintain the current deflection angle and no longer rotate, so that the exhaust tailpipe 50 is stably maintained in the preset tilt posture. This composite guiding mechanism realizes integrated control of "adjustment-locking", eliminating the need for an additional locking mechanism and significantly improving clamping accuracy and work efficiency.

[0042] In this embodiment, the rodless cylinder 401 is horizontally fixed to the upper side of the grinding table 10, and a sliding plate 402 is vertically connected to the top of its slider. A pair of dual-axis cylinders 403 are symmetrically fixed to the upper part of the sliding plate 402. The piston rods of both dual-axis cylinders 403 extend forward and are connected to a motor base 404. The motor 405 is mounted on the side of the motor base 404, and a friction wheel 406 is mounted on its output shaft. A vertically fixed part is located on the front side of the motor base 404. A support plate 407 has support rollers 408 rotatably supported at its upper and lower ends. Support bars 409 are hinged to the upper and lower sides of the support plate 407, each extending forward and rotatably supporting a support roller 410 at its extended end. A compression spring 411 is provided between each support bar 409 and the support plate 407. The grinding belt 412 is tensioned and wound around the friction wheel 406, the two support rollers 408, and the two support rollers 410. This five-roller tensioning structure, combined with the elastic pre-tension of the compression springs 411, allows the grinding belt 412 to adapt to the complex curved contour of the exhaust tailpipe 50, maintaining a constant contact pressure to avoid under-grinding or over-grinding, ensuring uniform surface finish.

[0043] Furthermore, a pair of support frames 101 are symmetrically connected to the lower side of the grinding table 10, and a pair of support feet 102 are symmetrically connected to the lower side of the support frames 101. This frame-type base structure provides high rigidity support, effectively suppressing vibrations generated during grinding and ensuring the stability of the entire machine's operation and the maintenance of long-term precision.

[0044] The working principle of a grinding device for exhaust pipes is as follows: First, two exhaust tailpipes 50 are respectively fitted into the positioning seats 206 on the left and right sides, so that their small ends are coaxially inserted into the inner end of the positioning seat 206, and the positioning shoulder 206a achieves axial limitation to prevent axial movement during processing.

[0045] Subsequently, the dual-axis cylinder 213 is activated, and its piston rod extends upward, pushing the V-shaped positioning plate 214 to lift the large ends of the two exhaust tailpipes 50. Since the inclined surface of the V-shaped positioning plate 214 matches the inclined surface of the large end of the tailpipe, this action synchronously adjusts the two exhaust tailpipes 50 to the preset downward tilt posture (as shown in state one in Figure 13), providing a unified spatial reference for subsequent precise docking and effectively avoiding misalignment or uneven grinding caused by initial posture deviation.

[0046] Next, the hydraulic cylinder 217 is activated, and its piston rod retracts downward, pulling the hinge bars 220 on both sides through the hinge seat 218, thereby driving the slide plate 203 to move synchronously towards each other along the linear guide rail 201.

[0047] During the first half of the movement (as shown in state two in Figure 13), the fixing block 312 on the telescopic rod 311 enters the spiral groove 205a of the mounting tube 205. Since the spiral groove 205a has a lead angle, the fixing block 312 will generate a circumferential component force when sliding along it, which forces the mounting tube 205 together with the positioning seat 206 and the clamped exhaust tailpipe 50 to rotate synchronously by 90 degrees, thereby actively adjusting the spatial angle of the two tubes and realizing high-precision automatic alignment.

[0048] In the latter half of the movement (as shown in state three in Figure 13), when the large end inclined surfaces of the two exhaust tailpipes 50 abut against each other, the second connecting ring 303 is blocked by the front limiting piece 313, while the first connecting ring 301 continues to move forward with the positioning seat 206. The relative axial displacement between the two is converted into the radial spreading action of the clamping bar 305 through the planar linkage mechanism, so that multiple clamping bars 305 are evenly attached to and pressed against the inner wall of the exhaust tailpipe 50, forming a self-centering and symmetrically distributed clamping force, which not only prevents circumferential slippage, but also avoids local stress concentration that could lead to pipe deformation.

[0049] After clamping and alignment are completed, the two servo motors 208 start synchronously, driving the two exhaust tailpipes 50 to rotate in opposite or the same direction at the same speed through a synchronous transmission system consisting of pulley 209, synchronous belt 211, and pulley 210. At the same time, the grinding mechanism 40 starts working: rodless cylinder 401 drives slide plate 402 to slowly feed axially, and dual-axis cylinder 403 dynamically adjusts the lateral position of the grinding belt 412 according to the preset contour program or real-time sensor feedback, so that it always fits the outer contour of the tailpipe; motor 405 drives friction wheel 406 to rotate at high speed, driving the annular grinding belt 412 tensioned and wound on friction wheel 406, support roller 408, and support roller 410 to perform continuous, full-coverage, and efficient grinding on the outer surface of the two exhaust tailpipes 50 (as shown in state four in Figure 13).

[0050] After grinding, the piston rod of hydraulic cylinder 217 extends, slide plate 203 moves outward and resets, and clamping mechanism 30 automatically releases under the action of compression spring 309, allowing the operator to remove the finished product. The entire device returns to its initial state and is ready to enter the next work cycle.

[0051] Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A grinding device for exhaust pipes, characterized in that, include: A grinding table (10); a pair of positioning mechanisms (20) symmetrically arranged on the left and right sides of the grinding table (10), each positioning mechanism (20) including a positioning seat (206) and a motor (208) connected to it for transmission, the positioning seat (206) having a positioning shoulder (206a) for engaging with the small end of the exhaust tailpipe (50) to limit the axial displacement of the exhaust tailpipe (50); the motor (208) for driving the exhaust tailpipe (50) to rotate uniformly around its own axis; a pair of clamping mechanisms (30) symmetrically arranged inside the two positioning seats (206), each clamping mechanism (30) including a clamping bar (305) and a planar linkage mechanism connected to it for transmission, the planar linkage mechanism for driving the clamping bar (305) to radially brace against the inner wall of the exhaust tailpipe (50) to limit the circumferential rotation of the exhaust tailpipe (50); a pair of clamping mechanisms (30) symmetrically arranged on the left and right sides of the grinding table (10), each positioning mechanism (20) including a positioning seat (206) and a motor (208) connected to it for transmission, the positioning seat (206) having a positioning shoulder (206a) for engaging with the small end of the exhaust tailpipe (50) to limit the axial displacement ... clamping mechanism (30) including a clamping bar (305) The grinding mechanism (40) in the middle of the grinding table (10) includes a rodless cylinder (401), a dual-axis cylinder (403), a motor (405), and a grinding belt (412). The rodless cylinder (401) is used to drive the grinding belt (412) to move along the axial direction of the exhaust tailpipe (50). The dual-axis cylinder (403) is used to drive the grinding belt (412) to move along the outer contour line of the exhaust tailpipe (50). The motor (405) is used to drive the grinding belt (412) to rotate at high speed. When a pair of exhaust tailpipes (50) are coaxially aligned and their large end inclined surfaces abut against each other, the two exhaust tailpipes (50) are synchronously driven to rotate by the motors (208) on both sides. At the same time, under the cooperative control of the rodless cylinder (401) and the dual-axis cylinder (403), the outer surfaces of the two exhaust tailpipes (50) are continuously and fully covered by grinding.

2. The grinding device for exhaust pipes according to claim 1, characterized in that, A pair of linear guide rails (201) are fixed parallel to each other on the upper side of the grinding table (10). A slider (202) is slidably fitted on each linear guide rail (201). The top of the two sliders (202) is connected to a slide plate (203). A mounting plate (204) is vertically fixed on the upper side of the slide plate (203). A mounting tube (205) is rotatably supported on the upper part of the mounting plate (204). The positioning seat (206) is coaxially fixed to the inner end of the mounting tube (205). The motor (208) is mounted on the mounting plate (204) through the motor seat (207). A pulley (209) is mounted on its output shaft. A pulley (210) is mounted on the outer end of the mounting tube (205). The pulley (209) and the pulley (210) are connected by a transmission belt (211).

3. The grinding device for exhaust pipes according to claim 2, characterized in that, The lower side of the grinding table (10) is horizontally connected to a connecting plate (216) via multiple connecting rods (215). A hydraulic cylinder (217) is installed at the center of the connecting plate (216). The piston rod of the hydraulic cylinder (217) extends upward and is connected to a hinge seat (218). The lower sides of the two sliding plates (203) are respectively provided with hinge seats (219). Each hinge seat (219) is hinged to the hinge seat (218) via a hinge bar (220).

4. A grinding device for exhaust pipes according to claim 2, characterized in that, The lower side of the slide plate (203) is connected to a mounting bracket (212). A dual-axis cylinder (213) is vertically mounted on the inner side of the mounting bracket (212). The piston rod of the dual-axis cylinder (213) extends upward and is connected to a V-shaped positioning plate (214). The inclined surface of the positioning plate (214) cooperates with the large end inclined surface of the exhaust tailpipe (50) to make the large end inclined surface of the axially positioned exhaust tailpipe (50) in a downward inclined position.

5. A grinding device for exhaust pipes according to claim 2, characterized in that, The first motor (208) is a servo motor or a stepper motor, the first pulley (209) and the second pulley (210) are synchronous pulleys, and the transmission belt (211) is a synchronous belt.

6. A grinding device for exhaust pipes according to claim 2, characterized in that, The inner end of the positioning seat (206) is coaxially fixed with a connecting ring 1 (301). The connecting ring 1 (301) has a plurality of connecting ears 1 (302) evenly distributed in the circumferential direction. The inner side of the connecting ring 1 (301) is coaxially provided with a connecting ring 2 (303). The connecting ring 2 (303) has a plurality of connecting ears 2 (304) evenly distributed in the circumferential direction. A plurality of clamping bars (305) are evenly arranged in the circumferential direction between the connecting ring 1 (301) and the connecting ring 2 (303). The inner side of each clamping bar (305) is provided with a connecting piece (306). The connecting piece (306) is hinged to the corresponding connecting ear 1 (302) through a pair of connecting bars 1 (307) and to the corresponding connecting ear 2 (304) through a pair of connecting bars 2 (308). A plurality of compression springs 1 (309) are evenly connected between the connecting ring 1 (301) and the connecting ring 2 (303).

7. A grinding device for exhaust pipes according to claim 6, characterized in that, The inner wall of the mounting tube (205) is uniformly provided with multiple spiral grooves (205a) along the circumference. The center of the positioning seat (206) is provided with a through hole (206b) with the same inner diameter as the mounting tube (205). The wall of the through hole (206b) is uniformly provided with multiple straight grooves (206c) along the circumference. Each straight groove (206c) and the corresponding spiral groove (205a) are axially connected to form a composite guide channel. A fixing plate (310) is vertically installed on the upper side of the grinding table (10). A telescopic rod (311) is horizontally installed on the upper part of the fixed plate (310). The telescopic rod (311) is coaxially arranged with the mounting tube (205). Its telescopic end extends inward and is connected to a limiting piece (313) to limit the axial displacement of the connecting ring (303). Multiple fixing blocks (312) are evenly arranged circumferentially at the inner end of the cylinder of the telescopic rod (311). Each fixing block (312) slides in cooperation with the composite guide channel formed by the corresponding spiral groove (205a) and straight groove (206c).

8. A grinding device for exhaust pipes according to claim 1, characterized in that, The rodless cylinder (401) is horizontally fixed to the upper side of the grinding table (10), and a sliding plate (402) is vertically connected to the top of its slider. A pair of dual-axis cylinders (403) are symmetrically fixed to the upper part of the sliding plate (402). The piston rods of the two dual-axis cylinders (403) extend forward and are connected to a motor base (404). The motor (405) is installed on the side of the motor base (404), and a friction wheel (406) is installed on its output shaft. A support plate (405) is vertically fixed to the front side of the motor base (404). 7) The upper and lower ends of the support plate (407) are respectively rotatably supported by support rollers (408). Support strips (409) are respectively hinged to the upper and lower sides of the support plate (407). Each support strip (409) extends forward and is rotatably supported by support rollers (410) at its extended end. A compression spring (411) is provided between each support strip (409) and the support plate (407). The grinding belt (412) is tensioned and wound around the friction wheel (406), the two support rollers (408) and the two support rollers (410).

9. A grinding device for exhaust pipes according to claim 1, characterized in that, The grinding table (10) has a pair of support frames (101) symmetrically connected to the lower side on the left and right, and a pair of support feet (102) symmetrically connected to the lower side of the support frames (101) in the front and back.

Images