New energy automobile part spraying production line and spraying method thereof

Abstract

The invention relates to the technical field of automobile part production, in particular to a new energy automobile part spraying production line and a spraying method thereof. The new energy automobile part spraying production line comprises a spraying chamber, a spraying robot corresponding to a workpiece is arranged in the spraying chamber, an upper conveying assembly is arranged in the spraying chamber, and the upper conveying assembly is provided with a vertically-downward upper supporting assembly; workpieces are hung at the bottom of the upper supporting assembly. A lower conveying assembly in the conveying direction is arranged on the bottom face in the spraying chamber, a vertically-upward lower supporting assembly is arranged on the lower conveying assembly, and a workpiece is clamped by the top of the lower supporting assembly. The spraying chamber is provided with a penetrating type conveying groove, and the upper conveying assembly and the lower conveying assembly form a closed-loop linkage structure through the conveying groove, so that workpieces are bidirectionally and synchronously driven in the vertical direction. The upper supporting assembly and the lower supporting assembly are located on the same vertical axis, it is ensured that a workpiece is vertically fixed in two directions, inertial displacement during low-speed rotation is counteracted, the standard consistency of the spraying posture is maintained, and the coating sagging or spraying missing defect caused by deviation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts production, and particularly to a spraying production line for new energy vehicle parts and a spraying method thereof. Background Art

[0002] The spraying production line for new energy vehicle parts is a key tooling equipment for fixing, supporting and transporting components such as body sheet metal parts and structural parts. This device is usually made of aluminum alloy or stainless steel, and needs to have corrosion resistance, high temperature tolerance and mechanical stability. Its core function is to keep the parts accurately positioned during the spraying process, and at the same time, through modular design, it can adapt to workpieces of different sizes and shapes, and cooperate with an automated transmission system to achieve continuous operation, ensuring that the parts maintain the best spraying angle during electrostatic spraying, drying and other processes, and finally ensuring the coating uniformity and process consistency.

[0003] Traditional production lines usually use brackets to support automotive parts. Due to the rigid clamping structure and shielding defects of the brackets, it is difficult to meet the precise spraying requirements of new energy vehicle parts. Taking the automotive swing arm as an example, such parts usually have special-shaped curved surfaces, hollow structures and asymmetric features. When traditional X-shaped frames and square frames are rigidly fixed through screws or chutes, the clamping points are concentrated at the edge support ribs, resulting in a difference of 8 - 12° between the suspended area in the middle of the workpiece and the actual assembly posture of the body. The posture deviation makes the spraying robot unable to accurately cover complex grooves, resulting in a film thickness deviation exceeding ±20μm, forming defects such as edge accumulation and sagging, and internal cavity under-spraying. In addition, during low-speed rotary spraying combined with lateral movement operation, due to uneven self-weight distribution and inertial effects of the swing arm, it will slowly slide along the screw axis, and the displacement of the swing arm in a single spraying cycle can reach 3 - 5mm, resulting in the swing arm slipping out of the positioning reference due to sliding.

[0004] Therefore, the present application provides a spraying production line for new energy vehicle parts and a spraying method thereof to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a spraying production line for new energy vehicle parts and a spraying method thereof, which solve the problems in the existing spraying production line that the brackets cause workpiece posture deviation and spraying shielding due to rigid clamping, and cause coating sagging and under-spraying due to inertial sliding during low-speed rotation, reducing production quality and efficiency.

[0006] To solve the above technical problems, the present invention provides a spraying production line for new energy vehicle parts, including a spraying chamber, a spraying robot is arranged corresponding to the workpiece in the spraying chamber, a plurality of vertical columns along the production conveying direction are vertically arranged at the rear side inside the spraying chamber, a triangular frame is arranged on the top of each column, an upper conveying component is commonly arranged on the triangular frame, the upper conveying component is provided with a vertically downward upper supporting component, and the workpiece is suspended at the bottom of the upper supporting component; The inner bottom surface of the spraying chamber is provided with a lower conveying component along the conveying direction. A vertically upward lower supporting component is arranged on the lower conveying component, and the top of the lower supporting component clamps the workpiece. Penetrating conveying grooves are opened on the left and right side walls of the spraying chamber. The upper conveying component and the lower conveying component form a closed-loop linkage structure through the conveying grooves, so that the workpiece is driven synchronously in the vertical direction. The upper supporting component and the lower supporting component are on the same vertical axis to ensure vertical bidirectional fixation of the workpiece, offset the inertial displacement during low-speed rotation, maintain the consistency of the reference of the spraying posture, and avoid coating sagging or missing spraying defects caused by deviation.

[0007] A further improvement of the technical solution of the present invention is that: the upper conveying component includes a first slide rail arranged on the upper triangular frame. The first slide rail is an I-shaped track arranged horizontally. A plurality of first holders are arranged on the first slide rail. The first holders are in an inverted Y shape. Rollers are respectively arranged on the opposite sides of the upper ends of the first holders. The rollers are engaged with the first slide rail. The bottoms of adjacent two first holders are hinged with a horizontal connecting plate. The center of the bottom of the connecting plate is hinged with a vertical connecting rod. The bottom of the connecting rod is connected with a horizontal sprocket through a first rotating shaft.

[0008] A further improvement of the technical solution of the present invention is that: a first chain is correspondingly nested in the middle of the first holder body. The first chain connects all the holders into one body. A tractor is arranged at the front end of the first chain. The first chain is driven by the tractor to move all the first holders synchronously.

[0009] A further improvement of the technical solution of the present invention is that: a second chain is meshed and arranged at the rear side of the sprocket. The second chain is fixed on the side wall of the triangular frame. The second chain is meshed with the sprocket to transmit the power of the sprocket rotation.

[0010] A further improvement of the technical solution of the present invention is that: the upper supporting component further includes a suspension rod vertically downward arranged at the bottom surface of the sprocket. A hanging rod is vertically arranged at the bottom of the suspension rod. First retaining plates are respectively arranged at both ends of the hanging rod. A second retaining plate is movably sleeved on the hanging rod. A spring is arranged between the second retaining plate and the first retaining plate at the outer end of the hanging rod. The first retaining plates are arranged relatively parallel to each other. An elastic clamping area is formed between the first retaining plate at the inner end of the hanging rod and the second retaining plate through the spring. The second retaining plate slides axially along the hanging rod to compress the spring to lock the workpiece.

[0011] A further improvement of the technical solution of the present invention is that: the lower conveying component includes a second slide rail arranged on the ground of the spraying chamber. The second slide rail is two parallel linear guide rails. A motor is arranged at the end of the second slide rail. The output shaft of the motor is connected with a lead screw. A plurality of sliders are arranged on the lead screw. The sliders are provided with threaded through holes matching the lead screw. The linear movement of the sliders is realized by driving the lead screw to rotate by the motor.

[0012] A further improvement of the technical solution of the present invention lies in that: the lower support assembly includes a second cage arranged on two adjacent sliders. The second cage is of a gantry structure. A lifting rod is vertically penetrated through the middle of the second cage. A horizontal lifting plate is arranged at the bottom of the lifting rod. The two ends of the lifting plate are respectively clamped to the two arms of the second cage. A locking knob is arranged at the clamping position of the lifting plate and the second cage.

[0013] A further improvement of the technical solution of the present invention lies in that: the top of the lifting rod is connected to a Y-shaped head through a second rotating shaft. Limit rings are arranged at the ends of the two arms of the Y-shaped head. Clamping rods are respectively penetrated through the limit rings. Third retaining pieces are arranged at both ends of the clamping rods. Springs are arranged between the limit rings and the third retaining pieces at the inner ends of the clamping rods. The springs are used to push the clamping rods to axially tighten and clamp the bottom of the workpiece.

[0014] A further improvement of the technical solution of the present invention lies in that: a protective shell is arranged on the second slide rail. The protective shell is made of magnetically conductive stainless steel. A gap corresponding to the movement of the second cage is opened at the top of the protective shell. A magnetic adsorption base is magnetically adsorbed on the protective shell. Multiple rows of bristles covering the gap are arranged on the magnetic adsorption base. The length of the bristles is 1.2 - 1.5 times the width of the gap, and they are arranged in a staggered manner to cover the full width of the slide rail. The bristles prevent paint from entering the inside of the second slide rail.

[0015] A method for spraying parts of a new energy vehicle parts spraying production line includes the following steps: S1. Positioning of the upper support assembly: Align the top lifting hole of the sprayed workpiece with the suspension rod. Compress the second retaining piece to store energy in the spring. After releasing, the spring pushes the second retaining piece and the first retaining piece to form a clamping force, locking the hanging position of the workpiece top. S2. Alignment of the lower support assembly: Move the lifting rod of the lower support assembly to raise the Y-shaped head to the bottom position of the workpiece. Pull the clamping rod to make the third retaining piece fit the bottom contour of the workpiece, so that the coaxiality error between the upper support assembly and the lower support assembly is ≤ 0.5 mm. S3. Synchronous conveying control: Start the tractor of the upper conveying assembly to drive the first chain. At the same time, the motor of the lower conveying assembly drives the lead screw, so that the upper and lower support assemblies move synchronously to the spraying station at a speed of 0.2 - 0.5 m / s. S4. Low-speed anti-offset spraying: During the low-speed rotation of the workpiece at 3 - 5 rpm, control the lateral movement acceleration ≤ 0.1 m / s², and perform an attitude review every 90° rotation; the spraying robot reciprocally sprays the special-shaped curved surface in a fan-shaped atomization mode, and the single-pass film thickness increment ≤ 8 μm. S5. Anti-pollution maintenance: During spraying, the bristles are arranged in a staggered manner to cover the full width of the slide rail, and the bristles prevent paint from entering the inside of the second slide rail.

[0016] Adopting the above technical solution, the present invention has the following beneficial effects: 1. A spraying production line for new energy vehicle parts provided by the present invention. Through the combined setting of the upper support component and the lower support component, it is beneficial for two-way synchronous positioning and eliminating rigid offset. The column, the upper support component and the lower support component construct a closed-loop linkage structure, and a vertical two-way clamping system is innovatively designed. The elastic clamping area of the upper support component uses spring dynamic locking, allowing adaptive fine-tuning of the top of the workpiece; the Y-shaped clamping head of the lower support component pushes the clamping rod through the limit ring and the spring, precisely fitting the bottom contour of the workpiece, keeping the center of gravity of the workpiece on the same axis as the upper support component and the lower support component, forming a two-way constraint mechanism, and overcoming the attitude offset problem caused by traditional rigid fixtures. Under the synchronous drive control, the workpiece is subjected to two-way equal-speed traction in the vertical direction. Even when the inertial force acts during low-speed rotation, the reference attitude can be maintained through the mechanical cancellation of the upper and lower supports, eliminating the coating sag and missed spraying defects caused by the offset.

[0017] 2. A spraying production line for new energy vehicle parts provided by the present invention. Through the combined setting of the upper conveying component and the lower conveying component, it is beneficial for compensating the transmission accuracy and controlling dynamic anti-offset. Aiming at the cumulative error caused by the traditional transmission gap, the articulated sprocket of the first cage and the second chain form a power transmission closed-loop, and the phase deviation of the slide rail movement is corrected in real time during the driving process of the tractor. The attitude is rechecked every 90° rotation to ensure that the displacement is always ≤0.3 mm during low-speed rotation of 3 - 5 rpm. The synchronous control of the lateral movement acceleration ≤0.1 m / s² makes the special-shaped curved surface stable during dynamic spraying, improving the coating thickness uniformity of spraying.

[0018] 3. A spraying production line for new energy vehicle parts provided by the present invention. Through the combined setting of the magnetic adsorption base and the brush bristles, it is beneficial for protecting the second slide rail and solving the problem of jamming of the second slide rail caused by paint intrusion. The surface of the magnetically conductive stainless steel protective shell is provided with a detachable magnetic adsorption base, which cooperates with the staggered ultra-dense brush bristles to form a physical isolation layer. The brush bristles cover the full width of the slide rail with a gap width of 1.2 - 1.5 times, blocking the paint from entering the inside of the second slide rail, and the detachable magnetic base is convenient for disassembly and can be quickly replaced; the actual measurement shows that this system can intercept more than 99% of the atomized paint from intruding into the inside of the slide rail. Compared with the traditional open structure, the equipment failure rate is reduced by 82%, and the slide rail maintenance cycle is extended from once a week to once a month, significantly improving the continuous operation ability of the production line. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is an overall schematic diagram of a spraying production line for new energy vehicle parts; Figure 2 It is a schematic structural diagram of a spraying production line for new energy vehicle parts without a spraying chamber; Figure 3 It is Figure 2 an enlarged schematic diagram of part A in Figure 4 It is Figure 2 an enlarged schematic diagram of part B in Figure 5 a schematic structural diagram of the workpiece position of the present invention; Figure 6 It is Figure 5 an enlarged schematic diagram of part C in Figure 7 It is Figure 5 an enlarged schematic diagram of part D in Figure 8 a schematic structural diagram of the lower conveying component and the lower supporting component of the present invention; Figure 9 It is Figure 5 an enlarged schematic diagram of part E in Figure 10 It is Figure 5 an enlarged schematic diagram of part F in Figure 11 a schematic structural diagram of the slider and the second cage of the present invention; Figure 12 It is Figure 11 an enlarged schematic diagram of part G in

[0021] Reference numerals: 1, workpiece; 2, spraying chamber; 21, conveying trough; 22, spraying robot; 23, column; 24, tripod; 3, upper conveying component; 31, first slide rail; 32, first cage; 33, roller; 34, connecting plate; 35, connecting rod; 36, first rotating shaft; 37, sprocket; 38, first chain; 39, second chain; 4, upper supporting component; 41, hanging rod; 42, suspension rod; 43, first stop piece; 44, second stop piece; 45, spring; 5, lower conveying component; 51, second slide rail; 52, motor; 53, lead screw; 54, slider; 6, lower supporting component; 601, second cage; 602, lifting rod; 603, lifting plate; 604, locking knob; 605, second rotating shaft; 606, Y-shaped head; 607, limiting ring; 608, clamping rod; 609, third stop piece; 610, protective shell; 611, gap; 612, magnetic adsorption base; 613, brush hair. Detailed implementation manners

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] The present invention will be further explained and illustrated below in conjunction with specific embodiments.

[0026] Such as Figures 1 - 12As shown in the figure, a spraying production line for new energy vehicle parts provided in this embodiment includes a spraying chamber 2. A spraying robot 22 is arranged corresponding to a workpiece 1 in the spraying chamber 2. The spraying robot 22 is an existing product, and a fan-shaped atomizing spray gun is integrated at the end. A plurality of vertical columns 23 along the production conveying direction are arranged at the rear side inside the spraying chamber 2. The distance between the columns 23 is 1.5 - 2 m. A triangular frame 24 is arranged at the top of each column 23. An upper conveying assembly 3 is jointly arranged on the triangular frames 24. The upper conveying assembly 3 is provided with a vertically downward upper supporting assembly 4, and the workpiece 1 is suspended at the bottom of the upper supporting assembly 4. A lower conveying assembly 5 along the conveying direction is arranged on the bottom surface inside the spraying chamber 2. A vertically upward lower supporting assembly 6 is arranged on the lower conveying assembly 5, and the top of the lower supporting assembly 6 clamps the workpiece 1. Through holes for conveying are opened on the left and right side walls of the spraying chamber 2. The upper conveying assembly 3 and the lower conveying assembly 5 form a closed-loop linkage structure through the conveying grooves 21, so that the workpiece 1 is driven synchronously in the vertical direction. The upper supporting assembly 4 and the lower supporting assembly 6 are on the same vertical axis, ensuring that the workpiece 1 is vertically fixed in two directions, offsetting the inertial displacement during low-speed rotation, maintaining the consistency of the reference of the spraying posture, and avoiding coating sagging or missing spraying defects caused by offset.

[0027] As Figures 2 - 3As shown in the figure, in this embodiment, the upper conveying assembly 3 includes a first slide rail 31 disposed on the tripod 24. The first slide rail 31 is a horizontally arranged I-shaped rail. A plurality of first cages 32 are arranged on the first slide rail 31. The first cages 32 are in an inverted Y shape. Rollers 33 are respectively arranged on the opposite sides of the upper ends of the first cages 32. The rollers 33 are engaged with the first slide rail 31. The bottoms of two adjacent first cages 32 are hinged with a horizontal connecting plate 34. The center of the bottom of the connecting plate 34 is hinged with a vertical connecting rod 35. The bottom of the connecting rod 35 is connected to a horizontal sprocket 37 through a first rotating shaft 36. A first chain 38 is correspondingly nested in the middle of the body of the first cage 32. The first chain 38 connects all the first cages 32 into one body. A tractor is arranged at the front end of the first chain 38. The first chain 38 drives all the first cages 32 to move synchronously through the tractor. A second chain 39 is meshed and arranged at the rear side of the sprocket 37. The second chain 39 is fixed to the side wall of the tripod 24. The second chain 39 is meshed with the sprocket 37 to transmit the power of the rotation of the sprocket 37. The I-shaped first slide rail 31 is fixed by the tripod 24. The first chain 38 is driven by the tractor to drive the group of inverted Y-shaped first cages 32 to move synchronously. The bottom of the first cage 32 is hinged with the sprocket 37 and meshed with the second chain 39 to form a closed-loop drive. During the movement, the sprocket 37 rotates and meshes with the second chain 39 on the fixed side to compensate the transmission clearance in real time and ensure the multi-station synchronization accuracy. On the one hand, it solves the cumulative error of the traditional slide rail: the meshing design of the hinged sprocket 37 and the second chain 39 eliminates the phase deviation caused by the telescopic of the chain, and the synchronous error of the movement of the cage group is ≤0.2mm; on the other hand, the closed-loop linkage prevents deviation: through the conveying groove 21, an upper and lower conveying closed-loop is formed to force the upper and lower to run synchronously, avoiding the inclination problem of the workpiece 1 caused by unilateral traction, and eliminating the inertial slip defect of 3-5mm in the workpiece 1.

[0028] As Figures 2 - 6As shown, in this embodiment, the upper support assembly 4 further includes a suspension rod 41 vertically downwardly disposed on the bottom surface of the sprocket 37. A suspension bar 42 is perpendicularly provided at the bottom of the suspension rod 41. First retaining plates 43 are respectively provided at both ends of the suspension bar 42. A second retaining plate 44 is movably sleeved on the suspension bar 42. A spring 45 is provided between the second retaining plate 44 and the first retaining plate 43 at the outer end of the suspension bar 42. The first retaining plates 43 and the second retaining plate 44 are relatively and parallelly arranged. An elastic clamping area is formed between the first retaining plate 43 at the inner end of the suspension bar 42 and the second retaining plate 44 through the spring 45. The second retaining plate 44 slides axially along the suspension bar 42 to compress the spring 45 to lock the workpiece 1. During clamping, the top lifting hole of the workpiece 1 is sleeved on the suspension bar 42. After the external force compresses the second retaining plate 44 and then releases it, the spring 45 rebounds to achieve self-locking; eliminating rigid clamping deviation, the elastic clamping allows the workpiece 1 to adaptively deflect within the range of ±2°, solving the problem that the difference between the actual assembly posture of the middle suspended area of the workpiece 1 and the vehicle body reaches 8 - 12°; the pre-tightening force of the spring 45 is adjustable, and with vertical double-sided fixation, it offsets the inertial displacement caused by uneven self-weight distribution during low-speed rotation. The measured slip of the workpiece is ≤0.3 mm.

[0029] As Figure 2 , Figures 8 - 12 shown, in this embodiment, the lower conveying assembly 5 includes a second slide rail 51 disposed on the ground of the spraying chamber 2. The second slide rail 51 is two parallel linear guide rails. A motor 52 is provided at the end of the second slide rail 51. The output shaft of the motor 52 is connected to a lead screw 53. A plurality of sliders 54 are provided on the lead screw 53. The sliders 54 are provided with threaded through holes matching the lead screw 53. The linear movement of the sliders 54 is realized by driving the lead screw 53 to rotate through the motor 52. The lower conveying assembly 5 realizes high-precision and stable conveying through double-rail cooperative driving and multi-point support structure: two linear guide rails are arranged in parallel on the ground of the spraying chamber 2 to form the second slide rail 51. The adjacent sliders 54 are meshed with the lead screw 53 through the threaded through holes to realize synchronous movement; the second cage 601 is horizontally installed on two adjacent sliders 54 to form a gantry-type double-point support. During operation, the motor 52 drives the lead screw 53 to rotate, driving two groups of sliders 54 to linearly move synchronously along the guide rails. The parallel layout of the double guide rails effectively disperses the load torque, eliminating the lateral yaw of the single-rail structure; at the same time, the double-slider 54 anchoring design of the second cage 601 enables it to bear symmetric driving forces during movement, avoiding vibration or jamming caused by uneven single-point stress. The measurement shows that this structure makes the straightness error of the movement of the slider 54 ≤0.05 mm, and the stability is improved by 63% compared with the traditional single-rail system. Especially during high-frequency reciprocating motion, the double-rail and double-slider 54 support can absorb more than 85% of the inertial vibration, ensuring that the workpiece 1 has no jitter or deviation at a conveying speed of 0.2 - 0.5 m / s, and solving the coating sag defect caused by the instability of the slide rail.

[0030] As Figure 2 , Figure 7 , Figure 8As shown in the figure, in this embodiment, the lower support assembly 6 includes a second cage 601 disposed on two adjacent sliders 54. The second cage 601 is in the shape of a gantry. A lifting rod 602 is vertically penetrated through the middle of the second cage 601. A horizontal lifting plate 603 is disposed at the bottom of the lifting rod 602. Both ends of the lifting plate 603 are respectively clamped to the two arms of the second cage 601. A locking knob 604 is disposed at the clamping position of the lifting plate 603 and the second cage 601. The top of the lifting rod 602 is connected to a Y-shaped head 606 through a second rotating shaft 605. Limit rings 607 are disposed at the ends of the two arms of the Y-shaped head 606. Clamping rods 608 are respectively penetrated through the limit rings 607. Third retaining pieces 609 are respectively disposed at both ends of the clamping rods 608. A spring 45 is disposed between the limit ring 607 and the third retaining piece 609 at the inner end of the clamping rod 608. The spring 45 is used to push the clamping rod 608 to axially tighten and clamp the bottom of the workpiece 1. The gantry-type second cage 601 is fixed to the slider 54. The top of the lifting rod 602 is connected to the Y-shaped head 606. The clamping rods 608 tighten the bottom of the workpiece 1 through the limit rings 607 and the spring 45. After adjusting the height of the lifting plate 603, the locking knob 604 is fixed, so that the Y-shaped head 606 adapts to the bottom surface contour of the workpiece 1, realizing two-way coaxial positioning: the two clamping rods 608 of the Y-shaped head 606 are pre-tightened by the spring 45, forcing the workpiece 1 to be coaxial with the upper support assembly 4 (error ≤ 0.5 mm), eliminating the spraying occlusion problem; in addition, the spring 45 of the clamping rod 608 adjusts the clamping force in real time as the workpiece 1 rotates, and cooperates with the synchronous driving up and down, so that the spraying coverage rate of the special-shaped curved surface is increased to 99.5%.

[0031] As Figure 10 shown in the figure, in this embodiment, a protective shell 610 is disposed on the second slide rail 51. The protective shell 610 is made of magnetically conductive stainless steel. A gap 611 corresponding to the movement of the second cage 601 is opened at the top of the protective shell 610. A magnetic adsorption base 612 is magnetically adsorbed on the protective shell 610. Multiple rows of bristles 613 covering the gap 611 are disposed on the magnetic adsorption base 612. The length of the bristles 613 is 1.2 - 1.5 times the width of the gap 611, and they are arranged in a staggered manner to cover the full width of the slide rail. The bristles 613 prevent paint from entering the inside of the second slide rail 51. Through the combined setting of the magnetic adsorption base 612 and the bristles 613, the production line is beneficial to protecting the second slide rail 51 and solving the problem of jamming of the second slide rail 51 caused by paint intrusion. A detachable magnetic adsorption base 612 is disposed on the surface of the magnetically conductive stainless steel protective shell 610, and together with the super-dense bristles 613 arranged in a staggered manner, a physical isolation layer is formed. The bristles 613 cover the full width of the slide rail with a width 1.2 - 1.5 times that of the gap 611, preventing paint from entering the inside of the second slide rail 51, and the detachable magnetic base 612 is convenient for disassembly and can be quickly replaced; actual measurements show that the system can intercept more than 99% of the atomized paint from invading the inside of the slide rail. Compared with the traditional open structure, the equipment failure rate is reduced by 82%, and the slide rail maintenance cycle is extended from once a week to once a month, significantly improving the continuous operation ability of the production line.

[0032] A component spraying method for a new energy vehicle component spraying production line, comprising the following steps: S1. Upper support component 4 positioning: Align the top lifting hole of the spraying workpiece 1 with the suspension rod 42, compress the second baffle 44 to store energy in the spring 45, and after release, the spring 45 pushes the second baffle 44 to form a clamping force with the first baffle 43, locking the top hanging position of the workpiece 1; S2. Lower support component 6 alignment: Move the lifting rod 602 of the lower support component 6 to raise the Y-shaped head 606 to the bottom position of the workpiece 1. By pulling the clamping rod 608, the third baffle 609 is fitted to the bottom surface contour of the workpiece 1, so that the coaxiality error between the upper support component 4 and the lower support component 6 is ≤ 0.5 mm; S3. Synchronous conveying control: Start the tractor of the upper conveying component 3 to drive the first chain 38, and at the same time, the motor 52 of the lower conveying component 5 drives the lead screw 53, so that the upper and lower support components move synchronously to the spraying station at a speed of 0.2 - 0.5 m / s; S4. Low-speed anti-offset spraying: During the low-speed rotation of the workpiece 1 at 3 - 5 rpm, control the lateral movement acceleration ≤ 0.1 m / s², and perform an attitude review every 90° of rotation; The spraying robot 22 reciprocally sprays the special-shaped curved surface in a fan-shaped atomization mode, and the single-pass film thickness increment ≤ 8 μm; S5. Anti-pollution maintenance: During the spraying process, the bristles 613 are arranged in a staggered manner to cover the full width of the slide rail, and the bristles 613 prevent the paint from entering the second slide rail 51.

[0033] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spraying production line for new energy vehicle parts, characterized in that It includes a spraying chamber (2). Inside the spraying chamber (2), a spraying robot (22) is arranged corresponding to the workpiece (1). Inside the spraying chamber (2), multiple vertical columns (23) along the production conveying direction are arranged at the rear side. At the top of each column (23), a tripod (24) is arranged. An upper conveying component (3) is jointly arranged on the tripod (24). The upper conveying component (3) is provided with a vertically downward upper supporting component (4). The workpiece (1) is suspended at the bottom of the upper supporting component (4). On the inner bottom surface of the spraying chamber (2), a lower conveying component (5) along the conveying direction is arranged. On the lower conveying component (5), a vertically upward lower supporting component (6) is arranged. The workpiece (1) is clamped at the top of the lower supporting component (6). Penetrating conveying grooves (21) are opened on the left and right side walls of the spraying chamber (2). The upper conveying component (3) and the lower conveying component (5) form a closed-loop linkage structure through the conveying grooves (21), so that the workpiece (1) is driven synchronously in the vertical direction. The upper supporting component (4) and the lower supporting component (6) are on the same vertical axis, ensuring that the workpiece (1) is vertically fixed in both directions, offsetting the inertial displacement during low-speed rotation, maintaining the consistency of the reference of the spraying posture, and avoiding coating sagging or missing spraying defects caused by offset.

2. The spraying production line for new energy vehicle parts according to claim 1, characterized in that, The upper conveying component (3) includes a first slide rail (31) arranged on the tripod (24). The first slide rail (31) is a horizontally arranged I-shaped rail. A plurality of first holders (32) are arranged on the first slide rail (31). The first holders (32) are in an inverted Y shape. At the upper ends of the opposite sides of the first holders (32), rollers (33) are respectively arranged. The rollers (33) are engaged with the first slide rail (31). The bottoms of adjacent two first holders (32) are hinged with a horizontal connecting plate (34). The center of the bottom of the connecting plate (34) is hinged with a vertical connecting rod (35). The bottom of the connecting rod (35) is connected with a horizontal sprocket (37) through a first rotating shaft (36).

3. The spraying production line for new energy vehicle parts according to claim 2, wherein, A first chain (38) is correspondingly nested in the middle of the body of the first holder (32). The first chain (38) connects all the first holders (32) into one body. A tractor is arranged at the front end of the first chain (38). The first chain (38) drives all the first holders (32) to move synchronously through the tractor.

4. A spraying production line for new energy vehicle parts according to claim 2, characterized in that, A second chain (39) is meshed and arranged at the rear side of the sprocket (37). The second chain (39) is fixed on the side wall of the tripod (24). The second chain (39) is meshed with the sprocket (37) to transmit the power of the rotation of the sprocket (37).

5. A spraying production line for new energy vehicle parts according to claim 1, characterized in that, The upper support assembly (4) further includes a suspension rod (41) vertically downwardly disposed on the bottom surface of the sprocket (37). A suspension bar (42) is vertically disposed at the bottom of the suspension rod (41). First retaining plates (43) are respectively disposed at both ends of the suspension bar (42). A second retaining plate (44) is movably sleeved on the suspension bar (42). A spring (45) is disposed between the second retaining plate (44) and the first retaining plate (43) at the outer end of the suspension bar (42). The first retaining plate (43) and the second retaining plate (44) are relatively and parallelly disposed. An elastic clamping area is formed between the first retaining plate (43) at the inner end of the suspension bar (42) and the second retaining plate (44) through the spring (45). The second retaining plate (44) slides axially along the suspension bar (42) to compress the spring (45) to lock the workpiece (1).

6. The spraying production line for new energy vehicle parts according to claim 1, wherein, The lower conveying assembly (5) includes a second slide rail (51) disposed on the floor of the spraying chamber (2). The second slide rail (51) is two parallel linear guide rails. A motor (52) is disposed at the end of the second slide rail (51). The output shaft of the motor (52) is connected to a lead screw (53). A plurality of sliders (54) are disposed on the lead screw (53). The slider (54) is provided with a threaded through hole matching the lead screw (53). The linear movement of the slider (54) is realized by driving the lead screw (53) to rotate by the motor (52).

7. An automotive parts spraying production line for new energy vehicles according to claim 6, characterized in that, The lower support assembly (6) includes a second cage (601) disposed on two adjacent sliders (54). The second cage (601) has a gantry structure. A lifting rod (602) is vertically penetrated through the middle of the second cage (601). A horizontal lifting plate (603) is disposed at the bottom of the lifting rod (602). Both ends of the lifting plate (603) are respectively clamped to the two arms of the second cage (601). A locking knob (604) is disposed at the clamping position of the lifting plate (603) and the second cage (601).

8. A spraying production line for new energy vehicle parts according to claim 7, characterized in that, The top of the lifting rod (602) is connected to a Y-shaped head (606) through a second rotating shaft (605). Limiting rings (607) are disposed at the ends of the two arms of the Y-shaped head (606). Clamping rods (608) are respectively penetrated through the limiting rings (607). Third retaining plates (609) are respectively disposed at both ends of the clamping rod (608). A spring (45) is disposed between the limiting ring (607) and the third retaining plate (609) at the inner end of the clamping rod (608). The clamping rod (608) is axially tightened inwardly by the spring (45) to clamp the bottom of the workpiece (1).

9. A spraying production line for new energy vehicle parts according to claim 7, characterized in that, A protective shell (610) is disposed on the second slide rail (51). The protective shell (610) is made of magnetically conductive stainless steel. A gap (611) corresponding to the movement of the second cage (601) is opened at the top of the protective shell (610). A magnetic adsorption base (612) is magnetically adsorbed on the protective shell (610). A plurality of rows of bristles (613) covering the gap (611) are disposed on the magnetic adsorption base (612). The length of the bristles (613) is 1.2 - 1.5 times the width of the gap (611), and they are arranged in a staggered manner to cover the full width of the second slide rail (51). The bristles (613) block the paint from entering the inside of the second slide rail (51).

10. A method for spraying parts of a new energy vehicle parts spraying production line, characterized in that, It includes the following steps: S1. Positioning of the upper support component (4): Align the top lifting hole of the sprayed workpiece (1) with the suspension rod (42), compress the second stop piece (44) to store energy in the spring (45), and after release, the spring (45) pushes the second stop piece (44) to form a clamping force with the first stop piece (43) to lock the hanging position at the top of the workpiece (1). S2. Alignment of the lower support component (6): Move the lifting rod (602) of the lower support component (6) to raise the Y-shaped head (606) to the bottom position of the workpiece (1). By pulling the clamping rod (608), make the third stop piece (609) fit the bottom surface contour of the workpiece (1), so that the coaxiality error between the upper support component (4) and the lower support component (6) is ≤ 0.5 mm. S3. Synchronous conveying control: Start the tractor of the upper conveying component (3) to drive the first chain (38), and at the same time, the motor (52) of the lower conveying component (5) drives the lead screw (53) to move the upper and lower support components synchronously to the spraying station at a speed of 0.2 - 0.5 m / s. S4. Low-speed anti-offset spraying: During the low-speed rotation of the workpiece (1) at 3 - 5 rpm, control the lateral movement acceleration ≤ 0.1 m / s², and perform an attitude review every 90° of rotation; The spraying robot (22) reciprocally sprays the special-shaped curved surface in a fan-shaped atomization mode, and the single-pass film thickness increment ≤ 8 μm. S5. Anti-pollution maintenance: During spraying, the bristles (613) are arranged in a staggered manner to cover the full width of the second slide rail (51), and the bristles (613) prevent the paint from entering the inside of the second slide rail (51).

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