Automobile bumper trimming device and method thereof
By combining electric heating wire hot melt cutting with a separation plate and contact roller, the mechanical damage and uneven cut of the bumper trimming device are solved, achieving fine cutting and stable positioning, and improving trimming quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING BEIQI MOULD & PLASTIC TECH CO LTD
- Filing Date
- 2026-04-01
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, the bumper trimming device has the problems of large mechanical damage and inflexible cutting, especially for bumpers made of thermoplastic materials, it is difficult to ensure the flatness of the cut.
The system employs a heating wire for thermal melting cutting, combined with a separating plate and contact rollers. An encoder detects the cutting progress, a limit component ensures the bumper's accurate posture, an exhaust fan removes fumes, and a separating roller pushes away the flash, achieving precise cutting and stable positioning.
It reduces mechanical damage, improves cut smoothness and cutting flexibility, ensures trimming quality and stability, and reduces the risk of adhesion between the device and materials.
Smart Images
Figure CN122008360A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bumper manufacturing technology, and in particular to a vehicle bumper trimming device and method. Background Technology
[0002] In the injection molding process of automotive bumpers, flash trimming is a critical step affecting the surface quality of the product. Traditional trimming techniques often use mechanical blade cutting or grinding wheel polishing. The rigid contact of these methods can easily cause stress concentration at the cut, leading to mechanical damage such as micro-cracks and surface peeling. This is especially true for bumpers made of thermoplastic materials such as polypropylene, where the smoothness of the cut is difficult to guarantee.
[0003] While hot-melt cutting technology can soften the material at high temperatures, reducing cutting resistance and minimizing mechanical damage to the bumper, existing hot-melt cutting devices are mostly blade-type. During operation, the large contact area between the blade and the molten material causes the melt to adhere to the blade surface, forming an adhesive layer that hinders continuous cutting. Furthermore, the large blade size limits its flexibility in adjusting to the complex contours of the bumper edges, making it unsuitable for edge cutting applications. Therefore, current technology still relies on mechanical cutting for trimming, a situation that necessitates improvement. Summary of the Invention
[0004] This invention provides a car bumper trimming device that can solve the problem of excessive mechanical damage to the bumper caused by existing trimming devices.
[0005] A car bumper trimming device includes a base, a mounting bracket slidably disposed on one side of the base, a drive mechanism mounted on one side of the mounting bracket, a trimming assembly mounted on the output end of the drive mechanism, the trimming assembly including a directional motor, a trimming head fixedly connected to the output end of the directional motor, a hot cutting frame rotatably mounted on one end of the trimming head, a heating wire fixedly mounted on one end of the inner wall of the hot cutting frame, a separating plate fixedly mounted in the middle of the inner wall of the hot cutting frame, and a separating roller rotatably mounted in the middle of the separating plate; a limiting assembly for limiting the bumper is fixedly mounted on the other side of the base.
[0006] As a further aspect of the present invention: a roller groove is provided on the bottom side of the trimming head away from the hot cutting frame, and a positioning docking assembly is provided on the inner wall of the roller groove. The positioning docking assembly includes a roller frame, and a contact roller is rotatably mounted on the inner wall of the roller frame. A docking groove is provided in the middle of the contact roller, and an encoder is fixedly mounted on one side of the roller frame.
[0007] As a further embodiment of the present invention: a detection groove is provided above the roller groove, a pressure sensor is fixedly installed at one end of the inner wall of the detection groove, a pressing plate is fixedly connected to the middle of the detection groove, a reset spring is fixedly connected between the pressing plate and the pressure sensor, and one side of the pressing plate is fixedly connected to the top of the roller frame through a pressing rod.
[0008] As a further aspect of the present invention: a heat dissipation groove is provided on the side of the trimming head near the hot cutting frame, a heat dissipation plate is fixedly connected to the top of the inner wall of the heat dissipation groove, a heat dissipation cavity is provided above the heat dissipation plate, and ventilation holes are provided on both sides of the heat dissipation cavity.
[0009] As a further embodiment of the present invention: an air suction hood is fixedly connected to one side of the top of the trimming head, an air suction port is provided on the side of the air suction hood near the hot cutting frame, an air suction fan is fixedly installed in the middle of the inner wall of the air suction hood, an air guide block is fixedly installed at the bottom of the inner wall of the air suction hood, an air outlet is provided in the middle of the air guide block, a filter screen is snapped onto the top of the air outlet, an air outlet pipe is fixedly connected to the bottom of the air outlet, and the bottom of the air outlet pipe communicates with the top of the heat dissipation cavity.
[0010] As a further aspect of the present invention: a flip motor is fixedly installed on one side of the inner wall of the trimming head, and the output end of the flip motor is fixedly connected to one end of the hot cutting frame.
[0011] As a further aspect of the present invention: the limiting component includes a limiting frame, a guide cover is fixedly connected to one side of the limiting frame, the inner wall of the guide cover is inclined, and a docking frame is fixedly installed in the middle of the guide cover. A plurality of limiting pads are fixedly connected to the inner wall edge of the docking frame, and a plurality of contact sensors are fixedly installed in the middle of the inner wall of the docking frame.
[0012] As a further aspect of the present invention: several negative pressure heads are fixedly installed on both the upper and lower sides of the inner wall of the docking frame.
[0013] As a further aspect of the present invention: a plurality of feeding cylinders are fixedly installed in the middle of the mounting frame, and a pusher plate is fixedly connected to the output end of each of the feeding cylinders.
[0014] As a further aspect of the present invention: the driving component includes a transverse guide rail, a vertical guide rail is slidably mounted on the inner wall of the transverse guide rail, and a mounting rod is fixedly connected to the inner wall of the vertical guide rail, one end of the mounting rod being fixedly connected to the trimming component.
[0015] A method for trimming the edges of a car bumper; comprising the following steps: Step 1: Load the bumper. The loading mechanism moves the push plate to push the bumper laterally so that it enters the docking frame. Step 2: The trimming head is moved by the drive component, so that the mating groove on the contact roller aligns with the edge of the bumper. Then, the flip motor drives the hot cutting frame to flip, so that the heating wire contacts the flash. The flash on the edge of the bumper is then hot-melted and cut by the heating of the heating wire. Step 3: Start the exhaust fan to draw out the fumes generated during the hot melt cutting process; Step 4: The trimming head is moved along the edge of the bumper by the drive component to trim the edge of the bumper. Step 5: Detect the rotational stroke of the contact roller using an encoder. When the detected stroke matches the preset perimeter of the bumper edge, the trimming is considered complete; otherwise, repeat step 4.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses a heating wire for hot-melt cutting to trim the edges, which causes less mechanical damage to the bumper and is less likely to collide or interfere with the bumper or other structures of the device, and can adapt to more precise cutting operations; compared with the blade-type hot-cutting structure, the contact area with the flash is smaller during cutting, the molten material is less likely to stick to the device structure, and the heating wire is smaller in size, so it is more convenient to adjust the rotation and displacement process; at the same time, the present invention uses the presence of a separating plate to guide and separate the cut flash, and uses the rotation of the separating roller to push the flash, widening the cutting gap, so that the cut flash is separated from the trimming head as a whole; This invention sets up contact rollers and opens docking grooves on the contact rollers. During the cutting and trimming process, the combination between the docking grooves and the bumper is used to roll and flatten the cut surface that has not yet been shaped in a short time after hot cutting through the rolling action of the contact rollers, thereby improving the flatness of the cut. On the other hand, the docking combination helps to achieve the positioning between the trimming head and the bumper, thereby improving the stability of the trimming operation. This invention uses an encoder to detect the rotation distance of the contact roller. During the trimming process, the distance traveled by the trimming component is determined by detecting the rotation distance of the contact roller, and then compared with the preset bumper edge circumference to determine the trimming completion status. If the error is large, the drive mechanism drives the trimming component to run again until the distance traveled by the trimming component is detected to be consistent with the preset bumper edge circumference or within the allowable error range, thereby improving the quality of the finished product obtained from the trimming process. The limiting component of the present invention fixes the bumper by contacting and pressing the limiting soft pad against the bumper. Several contact sensors are fixedly installed in the middle of the inner wall of the docking frame. When the bumper is installed, the position and posture of the bumper are detected by multiple contact sensors at different positions, thereby ensuring the accurate posture of the bumper during trimming operations. Attached Figure Description
[0017] Figure 1 This is a schematic diagram showing the state of the bumper after it has been installed according to the present invention; Figure 2 This is a three-dimensional schematic diagram of the trimming device of the present invention; Figure 3 This is a schematic diagram of the drive mechanism of the present invention; Figure 4 This is a perspective view of the trimming component of the present invention; Figure 5 This is a cross-sectional view of the trimming component of the present invention; Figure 6 This is a perspective view of the contact roller of the present invention; Figure 7 This is a schematic diagram illustrating the structure of the limiting component of the present invention; Figure 8 This is a cross-sectional schematic diagram of the limiting component of the present invention.
[0018] Explanation of reference numerals in the attached figures: 1. Base assembly; 101. Base; 102. Bearing guide rail; 103. Mounting bracket; 104. Feeding cylinder; 105. Push plate; 2. Drive mechanism; 201. Horizontal guide rail; 202. Vertical guide rail; 203. Mounting rod; 3. Trimming assembly; 301. Directional motor; 302. Trimming head; 303. Pressure sensor; 304. Roller groove; 305. Roller frame; 306. Contact roller; 307. Encoder; 308. Pressing plate; 309. Heat dissipation groove; 310. Suction hood; 311. Suction fan 312. Inlet; 313. Air guide block; 314. Air outlet duct; 315. Heat dissipation cavity; 316. Heat dissipation plate; 317. Heat cutting frame; 318. Heating wire; 319. Separation plate; 320. Separation roller; 321. Vent hole; 322. Docking groove; 323. Tilting motor; 324. Limiting block; 325. Filter screen; 4. Limiting assembly; 401. Limiting frame; 402. Guide cover; 403. Limiting pad; 404. Negative pressure head; 405. Contact sensor; 406. Docking frame; 5. Bumper. Detailed Implementation
[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.
[0020] like Figures 1 to 8 As shown in the figure, an embodiment of the present invention provides a car bumper trimming device, including a base assembly 1. Please refer to [link to relevant documentation]. Figure 2The base assembly 1 includes a base 101, which is a plate-shaped seat fixedly installed on the ground. A bearing guide rail 102 is embedded on one side of the top of the base 101, and a mounting frame 103 is slidably installed on the top of the bearing guide rail 102. In this embodiment, the top height of the bearing guide rail 102 is the same as the top height of the base 101, so that the weight of the mounting frame 103 and other structures is supported by the base 101, and the entire weight of the device is avoided from being applied to the bearing guide rail 102, which would result in excessive conveying resistance. Specifically, rollers can be rotatably installed on both sides of the bottom of the mounting frame 103. Through the rolling contact between the bottom of the rollers and the top of the base 101, the running resistance between the mounting frame 103 and the base 101 is further reduced. A drive mechanism 2 is installed on one side of the mounting frame 103, and a trimming assembly 3 is installed at the output end of the drive mechanism 2. A limit assembly 4 is fixedly installed on the other side of the top of the base 101. In use, the limit component 4 limits the position of the bumper 5. After limiting, the bumper 5 is positioned such that its inner edge faces the direction of the mounting bracket 103. For details, please refer to [reference needed]. Figure 1 Then, the mounting bracket 103 is moved by the support guide rail 102, causing the trimming component 3 to approach the bumper 5. The drive mechanism 2 then moves the trimming component 3 along the edge of the bumper 5 to trim the edge. The purpose of setting the mounting bracket 103 to slide is to adjust the distance between the mounting bracket 103, the trimming component 3, and the limiting component 4. During the loading process of the bumper 5, the mounting bracket 103 is pushed away from the limiting component 4 to avoid it.
[0021] In one embodiment, see Figure 2 and Figure 3 To enable the loading of the bumper 5, this application fixes several loading cylinders 104 in the middle of the mounting frame 103. Each loading cylinder 104 has a push plate 105 fixedly connected to its output end. An anti-slip pad is fixedly connected to one side of the push plate 105. The edges of the push plate 105 and the anti-slip pad are both set as arc surfaces. The width of the push plate 105 is the same as the width of the inner wall of the bumper 5. During the loading of the bumper 5, this achieves stable support and lateral pushing operation for the bumper 5.
[0022] In one embodiment, see Figure 3The driving component includes a horizontal guide rail 201, a vertical guide rail 202 slidably mounted on the inner wall of the horizontal guide rail 201, and a mounting rod 203 fixedly connected to the inner wall of the vertical guide rail 202. One end of the mounting rod 203 is fixedly connected to the trimming component 3. The combination of the horizontal guide rail 201 and the vertical guide rail 202 drives the mounting rod 203 and the trimming component 3 on it to move freely as a whole, so that the trimming component 3 can move along the edge of the bumper 5. In specific implementation, an electric push rod can be fixedly installed at the end of the mounting rod 203, and the electric push rod assists in pushing the trimming component 3 back and forth, making the position adjustment of the trimming component 3 more flexible.
[0023] In one embodiment, see Figure 4 The trimming assembly 3 includes a directional motor 301, the output end of which is fixedly connected to a trimming head 302. The trimming assembly 3 drives the trimming head 302 to rotate, thereby adapting to trimming operations on different tilt angles of the bumper 5 edge. A hot-cutting frame 317 is rotatably mounted on one end of the trimming head 302. A heating wire 318 is fixedly mounted on one end of the inner wall of the hot-cutting frame 317. A flipping motor is fixedly mounted on one side of the inner wall of the trimming head 302, and its output end is fixedly connected to one end of the hot-cutting frame 317. A limit stop is fixedly connected to the side wall of the trimming head 302 near the hot-cutting frame 317. The position of the limit stop satisfies the condition that when the hot-cutting frame 317 rotates and contacts the limit stop, the height of the heating wire... The position is consistent with the bottom height of the docking groove of the contact roller 306. The flipping motor is a servo motor to meet the needs of controlling the rotation direction and rotation angle of the hot cutting frame, thereby meeting the needs of controlling the raising and lowering of the hot cutting frame. This application uses the heating wire 318 to trim the edge by hot melt cutting, which causes less mechanical damage to the bumper 5. Moreover, because the heating wire 318 is small in size, it is more convenient to adjust the rotation and displacement process, and it is less likely to collide or interfere with the bumper 5 or other structures of the device, and it can adapt to more precise cutting operations. Compared with the blade-type hot cutting structure, the contact surface with the burr is smaller when cutting, and the molten material is less likely to stick to the cutting structure. In one embodiment, see Figure 4Because the hot cutting is performed using the heating wire 318, the contact area during cutting is small, resulting in a small gap after cutting. Furthermore, the cutting surfaces on both sides of the inner wall of the cutting gap are in a molten state, which can easily cause the cut flash to come into contact with each other again and melt and stick together. To address this issue, a separation plate 319 is fixedly installed in the middle of the inner wall of the hot cutting frame 317 of this application. The side of the separation plate 319 closest to the heating wire 318 is set as an inclined surface. The presence of the inclined surface and the separation plate 319 guides and separates the cut flash. To prevent the flash from sticking to the separation plate 319, a separation roller 320 is rotatably installed in the middle of the separation plate 319. By rotating the separation roller 320, the flash is pushed, widening the cutting gap and separating the flash from the trimming assembly 3 as a whole. In specific implementation, multiple sets of separation rollers 320 can be set and tilted to both sides of the separation plate 319 to assist in the rapid separation of the flash.
[0024] In one embodiment, see Figure 5 In the trimming head 302, a roller groove 304 is provided on the side away from the hot cutting frame 317 at the bottom. The inner wall of the roller groove 304 is provided with a positioning docking assembly, which includes a roller frame 305. A contact roller 306 is rotatably mounted on the inner wall of the roller frame 305. A docking groove is provided in the middle of the contact roller 306. The width of the docking groove is consistent with the edge thickness of the bumper 5. During the cutting and trimming process, the combination between the docking groove and the bumper 5 is used to roll and flatten the cut surface that has not yet been shaped after hot cutting through the rolling action of the contact roller 306, thereby improving the flatness of the cut and thus improving the processing quality. On the other hand, the docking combination between the contact roller 306 and the edge of the bumper helps to achieve the positioning between the trimming head 302 and the bumper 5, reducing the probability of the trimming head 302 dislodging during operation.
[0025] In one embodiment, see Figure 5To facilitate rapid cooling and shaping of the cut surface, a heat dissipation groove 309 is provided on the bottom side of the trimming head 302 near the hot cutting frame 317. A heat dissipation plate 316 is fixedly connected to the top of the inner wall of the heat dissipation groove 309. The heat dissipation plate 316 is supported by a metal material with high thermal conductivity, which is a copper plate in this embodiment. A heat dissipation cavity 315 is provided above the heat dissipation plate 316. Ventilation holes 321 are provided on both sides of the inner wall of the heat dissipation groove 309. The top of the ventilation holes 321 communicates with the interior of the heat dissipation cavity 315, and the heat dissipation plate 316 is cooled by the air flow in the heat dissipation cavity 315. This cools the internal area of the heat dissipation groove 309, while airflow is delivered through the vents 321 on both sides, achieving air supply and cooling within the heat dissipation groove 309, thereby cooling the cut surface entering the heat dissipation groove 309 and enabling the cut surface to cool down and solidify quickly. In this embodiment, the air supply operation of the heat dissipation cavity 315 can be achieved by setting an air supply pump and connecting the output end of the air supply pump to the heat dissipation cavity 315 through an air supply pipe, or by connecting the end of the heat dissipation cavity 315 to the outside, and introducing the airflow generated during the movement of the trimming head 302 into the heat dissipation cavity 315 and delivering it out through the through hole to achieve cooling.
[0026] In one embodiment, see Figure 6 An encoder 307 is fixedly installed on one side of the roller frame 305. The purpose of setting the encoder 307 in this application is to detect the rotation distance of the contact roller 306. Since the contact roller 306 contacts the edge of the bumper 5 during the trimming process, the distance of movement of the trimming component 3 can be determined by detecting the rotation distance of the contact roller 306, and then compared with the preset perimeter of the edge of the bumper 5 to determine the completion status of the trimming. The specific principle is as follows: When there is residue in the trimming, the residue will push the contact roller 306 to shift and rotate, resulting in an increase in the rotation distance of the contact roller 306, so that when the drive... When mechanism 2 drives trimming component 3 to move one revolution along the edge of bumper 5 and return to the starting position, if the rotation distance of contact roller 306 is detected to be greater than the preset circumference of the edge of bumper 5, it is determined that the trimming is incomplete and there is residue; if the rotation distance of contact roller 306 is detected to be less than the preset circumference of the edge of bumper 5, it means that contact roller 306 may disengage from the edge of bumper 5 during the movement; in the event of the above situation, drive mechanism 2 drives trimming component 3 to run one revolution again until it is determined that the movement distance of trimming component 3 is consistent with the preset circumference of the edge of bumper 5 or within the allowable error range.
[0027] In one embodiment, see Figure 5A detection groove is provided above the roller groove 304. A pressure sensor 303 is fixedly installed on one end of the inner wall of the detection groove. A pressing plate 308 is fixedly connected to the middle of the detection groove. A return spring is fixedly connected between the pressing plate 308 and the pressure sensor 303. One side of the pressing plate 308 is fixedly connected to the top of the roller frame 305 through a pressing rod. The pressure sensor 303 detects the contact pressure between the contact roller 306 and the edge of the bumper 5, and adjusts the pressure by moving each trimming component 3 to keep it within a preset range, thereby ensuring that the contact roller 306 and the bumper 5 are stably connected, so that the trimming operation can be carried out stably.
[0028] In one embodiment, see Figure 5 Since this application uses hot cutting, in order to avoid the fumes generated by hot cutting from polluting the surrounding working environment, this application has a suction hood 310 fixedly connected to the top side of the trimming head 302. The suction hood 310 has a suction port 312 on the side near the hot cutting frame 317. A suction fan 311 is fixedly installed in the middle of the inner wall of the suction hood 310. A guide block 313 is fixedly installed at the bottom of the inner wall of the suction hood 310. An air outlet is opened in the middle of the guide block 313. The air outlet of the suction fan 311 is directed towards the air outlet. Since the fumes are sucked out, a filter screen is snapped into the top of the air outlet. An opening is opened on the side of the suction hood 310 corresponding to the filter screen to facilitate the removal and replacement of the filter screen. In one embodiment, see Figure 5 To utilize the airflow discharged by the suction fan 311, an air outlet pipe 314 is fixedly connected to the bottom of the air outlet. The bottom of the air outlet pipe 314 is connected to the top of the heat dissipation cavity 315. The airflow delivered by the suction fan 311 increases the gas flow speed of the heat dissipation cavity 315 and the through hole, thereby accelerating the gas flow speed near the cut surface and increasing the cooling and shaping speed of the molten cut surface. In this embodiment, it is not necessary to set up an additional air pump and air pipe, which reduces the production cost of the device.
[0029] In one embodiment, see Figure 7 and Figure 8To achieve stable installation of the bumper 5, the limiting component 4 of this application includes a limiting frame 401. A guide cover 402 is fixedly connected to one side of the limiting frame 401. The inner wall of the guide cover 402 is inclined towards the center to guide the bumper 5 when it is inserted, facilitating its insertion and alignment into the docking frame 406. The docking frame 406 is fixedly installed in the middle of the guide cover 402. The width of the inner wall of the docking frame 406 is the same as the width of the bumper 5. Several limiting pads 403 are fixedly connected to the edge of the inner wall of the docking frame 406. The bumper 5 is fixedly fixed by contacting and pressing the limiting pads 403 against the bumper 5. Several contact sensors 405 are fixedly installed in the middle of the inner wall of the docking frame 406. When the bumper 5 is inserted, the multiple contact sensors 405 at different positions contact the bumper 5 to detect the position and attitude of the bumper 5, thereby ensuring the accurate attitude of the bumper 5 during the trimming operation.
[0030] In one embodiment, see Figure 7 and Figure 8 To further improve the positional stability of the bumper 5, several negative pressure heads 404 are fixedly installed on both the upper and lower sides of the inner wall of the docking frame 406. The several negative pressure heads 404 are connected to the external negative pressure equipment. The negative pressure is generated by the activation of the several negative pressure heads 404 to suck up and fix the bumper 5.
[0031] The present invention also provides a trimming method based on the above-mentioned trimming device for automobile bumpers 5; comprising the following steps: Step 1: Load the bumper 5. The loading mechanism drives the push plate 105 to move and push the bumper 5 laterally so that the bumper 5 enters the limiting component 4 and is accommodated by the docking frame 406 until all the contact sensors 405 in the docking frame 406 are triggered. Step 2: The driving component moves the trimming head 302, so that the mating groove on the contact roller 306 aligns with the edge of the bumper 5. Then, the flipping motor drives the hot cutting frame 317 to flip, so that the heating wire 318 contacts the flash. The heating wire 318 heats up and performs hot melting cutting on the flash of the edge of the bumper 5 until the hot cutting frame 317 contacts the limit stop. At this time, the heating wire 318 reaches the cutting depth. Step 3: Start the suction fan 311 to draw out the fumes generated during the hot melt cutting process; Step 4: The trimming head 302 is driven by the drive component to move along the edge of the bumper 5 to trim the edge of the bumper 5. Step 5: The encoder 307 detects the rotational stroke of the contact roller 306. When the detected stroke is consistent with the preset perimeter of the bumper 5, the trimming is considered complete. Otherwise, the drive assembly continues to drive the trimming head 302 to move one revolution along the edge of the bumper 5.
[0032] The working principle of the car bumper 5 trimming device provided by the present invention is as follows: First, the bumper 5 is moved and transported manually or by external hoisting equipment to the space between the mounting frame 103 and the limiting component 4, ensuring that its edge is bent towards the mounting frame 103. Then, the feeding cylinder 104 drives the push plate 105 to push out to the inner wall of the bumper 5 to support and push the bumper 5. The mounting frame 103 is moved towards the limiting component 4 by the bearing guide rail 102, so that the bumper 5 enters the docking frame 406 after being guided by the guide cover 402. When several contact sensors 405 detect contact with the bumper 5, it is determined that the bumper 5 is installed in place. At this time, the external negative pressure equipment is started to perform negative pressure suction on the edge of the bumper 5 by several negative pressure heads 404. The suction effect further enhances the positioning stability of the bumper. The feeding cylinder 104 drives the push plate 105 to retract and reset, completing the preparation for the trimming operation. At this time, the horizontal guide rail 201 and the vertical guide rail 202 are started, driving the trimming head 302 to move. In conjunction with the directional motor 301, the trimming head 302 is rotated, so that the mating groove on the contact roller 306 is aligned with the edge of the bumper 5. The heating wire 318 starts working, and the flipping motor drives the hot cutting frame 317 to rotate until it contacts the limit stop. At this time, the height of the heating wire 318 is the same as the bottom height of the mating groove of the contact roller 306. Then, the bearing guide rail 102 drives the mounting frame 103 to move forward, so that the trimming assembly 3 moves forward as a whole. The heating wire 318 is used to cut the flash until the cutting wire 318 passes through the flash until it moves to the edge of the bumper 5 (since the installation position of the bumper is fixed, the position of its edge can be predetermined). At this time, the drive mechanism 2 drives the trimming head 302 to move along the edge of the bumper 5 until the mating groove of the contact roller 306 contacts the edge of the bumper 5. This contact position is recorded as the starting position of the trimming operation. Then, the drive mechanism 2 drives the trimming assembly 3 to move along the edge of the bumper 5, thereby trimming and cutting the burrs attached to the edge of the bumper 5. During the trimming process, the suction fan 311 is activated, and the smoke generated by the trimming operation is drawn into the suction hood 310 through the suction port 312. After being filtered by the filter screen, the smoke is sent into the heat dissipation chamber 315 through the air outlet 314, and then sent out through several through holes to cool the cut surface of the bumper 5. At the same time, the contact roller 306 presses against the cut surface to help to flatten and shape the cut surface, thereby improving the quality of the trimming finished product. For the cut burrs, the suction operation of the smoke drives the airflow to quickly cool the molten part of the burrs. Then, guided by the separation roller 320 of the separation plate, the burrs fall off and are discharged from one side. When the drive mechanism 2 drives the trimming component 3 to move one revolution along the edge of the bumper 5 and return to the starting position, the rotation distance of the contact roller 306 obtained by the encoder 307 is compared with the preset edge length of the bumper 5. When the error of the comparison result exceeds the allowable range, the driven mechanism drives the trimming component 3 to move one revolution along the edge of the bumper 5 to perform the trimming operation again until the error of the comparison result is reduced to the allowable range. At this time, the trimming is completed. Then, the mounting bracket 103 is moved backward by the bearing guide rail 102, so that the trimming component 3 is disengaged from the bumper 5, the external negative pressure equipment stops working, and the trimmed bumper 5 is manually removed from the limiting component 4.
[0033] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.
Claims
1. A car bumper trimming device, characterized in that, The device includes a base (101), a mounting bracket (103) slidably disposed on one side of the base (101), a drive mechanism (2) mounted on one side of the mounting bracket (103), a trimming assembly (3) mounted on the output end of the drive mechanism (2), the trimming assembly (3) including a directional motor (301), a trimming head (302) fixedly connected to the output end of the directional motor (301), a hot cutting frame (317) rotatably mounted on one end of the trimming head (302), a heating wire (318) fixedly mounted on one end of the inner wall of the hot cutting frame (317), a separation plate (319) fixedly mounted in the middle of the inner wall of the hot cutting frame (317), and a separation roller (320) rotatably mounted in the middle of the separation plate (319); a limiting assembly (4) for limiting the bumper (5) is fixedly mounted on the other side of the base (101).
2. The automotive bumper trimming device as described in claim 1, characterized in that, A flip motor is fixedly installed on one side of the inner wall of the trimming head (302), and the output end of the flip motor is fixedly connected to one end of the hot cutting frame (317).
3. The automotive bumper trimming device as described in claim 1, characterized in that, The trimming head (302) has a heat dissipation groove (309) on the side near the hot cutting frame (317) at the bottom. A heat dissipation plate (316) is fixedly connected to the top of the inner wall of the heat dissipation groove (309). A heat dissipation cavity (315) is opened above the heat dissipation plate (316). Ventilation holes (321) are opened on both sides of the heat dissipation cavity (315).
4. The car bumper trimming device as described in claim 3, characterized in that, A suction hood (310) is fixedly connected to one side of the top of the trimming head (302). A suction port (312) is opened on the side of the suction hood (310) near the hot cutting frame (317). A suction fan (311) is fixedly installed in the middle of the inner wall of the suction hood (310). A guide block (313) is fixedly installed at the bottom of the inner wall of the suction hood (310). An air outlet is opened in the middle of the guide block (313). A filter screen is snapped to the top of the air outlet. An air outlet pipe (314) is fixedly connected to the bottom of the air outlet. The bottom of the air outlet pipe (314) is connected to the top of the heat dissipation cavity (315).
5. The automotive bumper trimming device as described in claim 1, characterized in that, The bottom of the trimming head (302) is provided with a roller groove (304) on the side away from the hot cutting frame (317). The inner wall of the roller groove (304) is provided with a positioning docking assembly. The positioning docking assembly includes a roller frame (305). A contact roller (306) is rotatably installed on the inner wall of the roller frame (305). A docking groove is provided in the middle of the contact roller (306). An encoder (307) is fixedly installed on one side of the roller frame (305).
6. The automotive bumper trimming device as described in claim 5, characterized in that, A detection groove is provided above the roller groove (304). A pressure sensor (303) is fixedly installed at one end of the inner wall of the detection groove. A pressing plate (308) is fixedly connected to the middle of the detection groove. A reset spring is fixedly connected between the pressing plate (308) and the pressure sensor (303). One side of the pressing plate (308) is fixedly connected to the top of the roller frame (305) through a pressing rod.
7. The automotive bumper trimming device as described in claim 5, characterized in that, The limiting component (4) includes a limiting frame (401), a guide cover (402) is fixedly connected to one side of the limiting frame (401), the inner wall of the guide cover (402) is inclined, and a docking frame (406) is fixedly installed in the middle of the guide cover (402). Several limiting pads (403) are fixedly connected to the inner wall edge of the docking frame (406), and several contact sensors (405) are fixedly installed in the middle of the inner wall of the docking frame (406).
8. The automotive bumper trimming device as described in claim 1, characterized in that, A plurality of feeding cylinders (104) are fixedly installed in the middle of the mounting frame (103), and a pusher plate (105) is fixedly connected to the output end of each of the feeding cylinders (104).
9. The automotive bumper trimming device as described in claim 1, characterized in that, The drive assembly includes a transverse guide rail (201), on the inner wall of which a vertical guide rail (202) is slidably mounted, and on the inner wall of the vertical guide rail (202) a mounting rod (203) is fixedly connected, with one end of the mounting rod (203) fixedly connected to the trimming assembly (3).
10. A method for trimming the edges of an automobile bumper, applied to the automobile bumper trimming device of claim 7, characterized in that, Includes the following steps: Step 1: Load the bumper (5) by moving the push plate (105) through the loading mechanism to push the bumper (5) laterally so that the bumper (5) enters the docking frame (406); Step 2: The trimming head (302) is moved by the drive assembly, so that the mating groove on the contact roller (306) aligns with the edge of the bumper (5). Then, the flipping motor drives the hot cutting frame (317) to flip, so that the heating wire (318) contacts the flash. The flash on the edge of the bumper (5) is then hot melted and cut by the heating of the heating wire (318). Step 3: Start the exhaust fan to draw out the fumes generated during the hot melt cutting process; Step 4: The trimming head (302) is driven by the drive component to move along the edge of the bumper (5) to trim the edge of the bumper (5); Step 5: The rotation stroke of the contact roller (306) is detected by the encoder (307). When the detected stroke is consistent with the preset edge circumference of the bumper (5), the trimming is completed; otherwise, step 4 is repeated.