Pre-surface treatment equipment and method for high-precision sheet metal bending

Abstract

The present invention relates to the field of sheet metal processing, and specifically to a pre-surface treatment device and a treatment method for high-precision sheet metal bending processing. The pre-surface treatment device for high-precision sheet metal bending processing comprises a processing bin, wherein the processing bin is provided with a feeding unit for conveying sheet metal parts, and a loading unit, a grinding unit, a cleaning unit and a unloading unit which are sequentially arranged around the feeding unit, wherein the grinding unit comprises a surface grinding mechanism and an edge grinding mechanism, wherein the surface grinding mechanism comprises a grinding disc and a pressure regulating component, and the edge grinding mechanism comprises a grinding belt and a pressure buffer component. The present invention improves the effect of all-round grinding of sheet metal parts by integrating the functions of the surface grinding mechanism and the edge grinding mechanism, and under the action of the pressure regulating component and the pressure buffer component of the surface grinding mechanism and the edge grinding mechanism, damage to the sheet metal parts due to excessive grinding pressure is avoided.

Description

Technical Field

[0001] The invention relates to the field of sheet metal processing, in particular to a pre-surface treatment device for high-precision sheet metal bending processing, and also to a pre-surface treatment method for high-precision sheet metal bending processing. Background Art

[0002] Sheet metal parts are widely used in the fields of automobiles, aerospace, electronics, home appliances, etc., and their processing quality directly affects the performance and appearance of the final product. In the production process of sheet metal parts, the plates usually need to be stored and stacked before bending and forming. However, due to the close contact between the upper and lower surfaces of the plates when they are stacked, the upper and lower surfaces and the four sides are oxidized and rusted to varying degrees due to contact with the outside air. This phenomenon will inevitably affect the quality of the plates during storage and processing. If oxidation and rust are not dealt with in time, the thickness of the plates will be uneven. In the subsequent bending process, the bending accuracy of the sheet metal parts may be affected due to uneven local stress, and the smoothness of the plate surface will be damaged, affecting the effects of subsequent surface treatment processes such as painting and electroplating, and increasing the risk of breakage or deformation during the production process.

[0003] The existing mechanical grinding devices for sheet metal parts lack grinding protection for the workpiece. When the mechanical parameters are set incorrectly or the driving structure of the grinding equipment is damaged, it is easy for the grinding roller to stay at a certain position of the workpiece for too long, and then over-grind that position. The result of excessive grinding will cause the product surface to be uneven or even cause irreparable damage, seriously affecting the processing quality of the workpiece and causing economic losses. Further improvement is needed.

[0004] The currently disclosed Chinese patent CN117067016A is a sheet metal grinding device and grinding process for preventing over-grinding, comprising a grinding machine body, a grinding platform being arranged on the grinding machine body, a grinding assembly, a slide assembly, a monitoring assembly and a driving mechanism being arranged on the grinding machine body, the slide assembly being fixedly mounted on the grinding machine body, the slide assembly being used to drive the grinding assembly to move along the surface of the workpiece, the grinding assembly being transmission-connected with the slide assembly, the grinding assembly being used to grind the surface of the sheet metal, the monitoring assembly being fixed on the grinding machine body, and the monitoring assembly being used to In order to monitor the state that the grinding component stops moving, the driving mechanism includes a driving component and a regulating component, and both the driving component and the regulating component are connected to the grinding component in transmission. The driving component is used to drive the grinding component to move away from the workpiece, and the regulating component is used to adjust the response time of the driving component. When the monitoring component detects that the grinding component continues to grind a certain position of the workpiece, the driving component is operated to make the grinding component move away from the workpiece after a period of time. When the grinding pressure of the grinding component on the workpiece changes, the regulating component adjusts the response time of the driving component after operation, forcing the operation process of the driving component to change.

[0005] According to the above patent, the above patent detects through the monitoring component that when the grinding component continuously grinds a certain position of the workpiece, the driving component operates and controls the grinding component to move when the workpiece grinding limit time is reached, and then separates from the workpiece surface, which is beneficial to avoid excessive grinding of the workpiece by the grinding component. However, although this method can avoid excessive grinding of one part of the sheet metal, the grinding intensity is not easy to control, especially when the time control does not fully match the actual grinding requirements, it is easy to leave visible grinding marks or transition zones, which can easily cause the sheet metal to be over-grinded and thinned, and even easily cause the sheet metal to deform. Therefore, there is a need for a surface treatment equipment that can control the grinding intensity of sheet metal parts to ensure that the sheet metal parts themselves are not damaged. Summary of the invention

[0006] In view of the problems existing in the prior art, a high-precision surface treatment device for pre-bending processing of sheet metal parts is provided. The present invention improves the effect of all-round grinding of sheet metal parts by integrating the functions of a surface grinding mechanism and an edge grinding mechanism, and cooperating with a flip component and a rotating component. Under the action of the pressure regulating component and the pressure buffer component of the surface grinding mechanism and the edge grinding mechanism, damage to the sheet metal parts due to excessive grinding pressure is avoided. At the same time, the rust on the surface of the sheet metal parts is observed through a monitor to ensure that the surface grinding mechanism only processes the rusted area and removes a layer of rust with a slight force to ensure the quality of the sheet metal parts.

[0007] In order to solve the problems of the prior art, the present invention provides a high-precision sheet metal bending processing front surface treatment equipment, including a processing warehouse, the processing warehouse is provided with a feeding unit for conveying sheet metal parts, and a loading unit, a grinding unit, a cleaning unit and a unloading unit are sequentially arranged around the feeding unit, wherein the grinding unit includes a surface grinding mechanism and an edge grinding mechanism, and a displacement driving mechanism, the displacement driving mechanism has a moving block for installing the surface grinding mechanism and the edge grinding mechanism, and the moving block is also provided with a monitor for observing the position of rust on the surface of the sheet metal part The surface grinding mechanism includes a grinding disc and a downward pressure cylinder fixedly arranged on a moving block, and a pressure regulating component arranged between the grinding disc and the downward pressure cylinder. The edge grinding mechanism includes a grinding belt and a lifting component arranged on the moving block and connected to the grinding belt, and a pressure buffer component arranged on the lifting component and connected to the grinding belt. The surface grinding mechanism and the edge grinding mechanism are also respectively provided with a surface grinding driver and an edge grinding driver. The grinding unit also includes a flipping component for flipping the sheet metal part, and a rotating component for horizontally rotating the sheet metal part.

[0008] Preferably, the pressure regulating assembly includes a rotating shaft fixedly connected to the grinding disc, and an upper sleeve and a lower sleeve mounted on the rotating shaft, a compression spring fixedly connected between the upper sleeve and the lower sleeve, the upper sleeve can move along the axial direction of the rotating shaft, the lower sleeve is fixedly connected to the rotating shaft, the upper sleeve and the lower sleeve are connected along their axial direction in a clamping manner, an upper pressure plate for the upper sleeve to be rotatably connected thereto is fixedly provided on the output shaft of the lower pressure cylinder, and a surface grinding drive is arranged on the upper pressure plate and is transmission-connected to the upper sleeve.

[0009] Preferably, an upper transmitter and a lower receiver are respectively provided on the upper sleeve and the lower sleeve, and the upper transmitter and the lower receiver are arranged corresponding to each other. When the grinding disc contacts the surface of the sheet metal, as the upper sleeve is continuously pressed downward, the upper sleeve moves relative to the lower sleeve, and the downward pressure of the grinding disc is controlled by detecting the distance between the upper transmitter and the lower receiver.

[0010] Preferably, a ring body is fixedly provided at the lower end of the lower sliding sleeve and is sleeved on the grinding disc, a ventilation gap is left between the ring body and the grinding disc, the rotating shaft is specifically a hollow structure with an opening at the upper end, and an air passage connected to the ventilation gap is opened between the rotating shaft and the lower sliding sleeve.

[0011] Preferably, the lifting assembly includes a lifting frame and a lifting cylinder for driving the lifting frame to move vertically, the lifting frame is provided with a driving wheel and a driven wheel for connecting the grinding belt, the distance between the driving wheel and the driven wheel is greater than the length of the sheet metal, and the driving wheel is connected to the edge grinding driver.

[0012] Preferably, the pressure buffer assembly includes a tensioning wheel arranged on the lifting frame body for the grinding belt to be sleeved thereon, and a buffer connecting piece is provided between the tensioning wheel and the lifting frame body.

[0013] Preferably, the buffer connecting member has a buffer spring arranged along the direction of the grinding belt portion between the vertical driving wheel and the driven wheel, and the lifting frame body is respectively provided with a fixed block fixedly arranged on the lifting frame body and a movable block movably arranged on the lifting frame body, the buffer spring is fixedly connected between the fixed block and the movable block, the movable block is provided with a tensioning shaft for rotationally connecting the tensioning wheel, and the lifting frame body is provided with a guide opening for the tensioning shaft to slide therein along the axial direction of the buffer spring.

[0014] Preferably, the feeding unit has a mold for placing the sheet metal, and the mold has grooves for allowing the short and long sides of the sheet metal to face the edge grinding mechanism respectively. When the edge grinding mechanism grinds the edge of the sheet metal, the sheet metal is controlled to rotate and embed into the corresponding groove through the rotating component, so that the process of grinding the edge of the sheet metal remains stable.

[0015] Preferably, a limiting plate is provided on the side of the mold facing the edge grinding mechanism, and a toggle assembly capable of driving the limiting plate to move closer to or away from the mold is provided between the flip assembly and the limiting plate.

[0016] The present invention also provides a method for pre-processing a high-precision sheet metal part surface, comprising the following steps:

[0017] S1, start the loading unit to place the sheet metal part on the feeding unit;

[0018] S2, start the feeding unit to move the sheet metal part to the grinding unit, and grind the rust on the sheet metal part in all directions under the operation of the surface grinding mechanism and the edge grinding mechanism;

[0019] S3, start the feeding unit to move the sheet metal part to the cleaning unit to clean the surface of the sheet metal part;

[0020] S4, start the unloading unit to take out the sheet metal parts from the feeding unit and send them to the next process.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention ensures that the grinding disc does not apply excessive pressure through the compression spring combined with the upper transmitter and the lower receiver, thereby avoiding damage to the surface of the sheet metal. At the same time, it also prevents the situation of insufficient pressure, ensuring that the grinding disc is always in close contact with the surface of the sheet metal, achieving a slight grinding effect until the rust can be removed, preventing excessive grinding, improving the grinding effect of the sheet metal, and ensuring the quality of the sheet metal.

[0023] 2. During the grinding process, the present invention uses the grinding disc to allow airflow to pass through the circulation gap between the ring body and the grinding disc. Therefore, dust and heat can be taken away by the airflow, and the dust and debris around the grinding disc are effectively discharged to avoid their accumulation on the grinding disc, thereby ensuring the grinding efficiency, improving the grinding accuracy, and avoiding the surface of the sheet metal being scratched due to the influence of debris during the grinding process.

[0024] 3. The present invention achieves a buffering effect on the grinding belt through the tension wheel under the action of the buffer connector, and the pressure between the grinding belt and the edge of the sheet metal can be maintained within a suitable range, which can effectively grind without damaging the edge of the sheet metal, thereby improving the grinding effect and ensuring the quality of the sheet metal.

[0025] 4. The present invention enables sheet metal parts to be embedded in the grooves on the mold to prevent the sheet metal parts from shifting during the grinding process, providing a stable foundation for the sheet metal parts and facilitating the precise positioning of the sheet metal parts during the flipping and rotation processes, thereby ensuring that the edge grinding mechanism can effectively grind the edges of the sheet metal parts and improving the grinding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural diagram of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0027] Figure 2 It is a three-dimensional structural diagram of the pre-surface treatment equipment for high-precision sheet metal bending processing excluding the processing chamber.

[0028] Figure 3 It is a top view of the pre-surface treatment equipment for high-precision sheet metal bending processing without the processing chamber.

[0029] Figure 4 This is a three-dimensional schematic diagram of the feeding unit and grinding unit of the pre-surface treatment equipment for high-precision sheet metal bending processing Figure 1 .

[0030] Figure 5 This is a three-dimensional schematic diagram of the feeding unit and grinding unit of the pre-surface treatment equipment for high-precision sheet metal bending processing Figure 2 .

[0031] Figure 6 It is a three-dimensional structural diagram of the mold and grinding unit of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0032] Figure 7 It is a three-dimensional structural schematic diagram of the surface grinding mechanism of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0033] Figure 8 It is a three-dimensional structural cross-sectional view of the surface grinding mechanism of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0034] Fig. 9 It is a three-dimensional structural schematic diagram of the edge grinding mechanism of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0035] Fig.10 It is a three-dimensional structural cross-sectional view of the edge grinding mechanism of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0036] Fig.11 It is a schematic diagram of the three-dimensional structure of the mold and sheet metal parts of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0037] Fig.12 It is a three-dimensional structural cross-sectional view of the mold and sheet metal parts of the pre-surface treatment equipment for high-precision sheet metal bending processing.

[0038] Fig.13 yes Figure 5 An enlarged schematic diagram of point A.

[0039] The numbers in the figure are: 1. processing chamber; 2. feeding unit; 21. mold; 211. vacuum channel; 212. bottom plate; 22. limit plate; 221. guide rod; 222. end sleeve; 2221. reset spring; 2222. abutting edge; 23. toggle assembly; 231. toggle plate; 232. pull-down cylinder; 3. sheet metal; 4. feeding unit; 5. grinding unit; 51. surface grinding mechanism; 511. grinding disc; 5111. ring body; 5112. airway; 512. down-pressing cylinder; 5121. upper pressure plate; 5122. lower pressure plate; 5123. hollow column; 513. pressure regulating assembly; 5131. rotating shaft; 5132. upper sliding sleeve; 5133. lower sliding sleeve; 5134. compression spring; 5135. upper launcher; 513 6. Lower receiver; 514. Surface grinding driver; 52. Edge grinding mechanism; 521. Grinding belt; 522. Lifting frame; 5221. Lifting cylinder; 5222. Driving wheel; 5223. Driven wheel; 523. Pressure buffer assembly; 5231. Tensioning wheel; 5232. Buffer spring; 5233. Fixed block; 5234. Movable block; 5235. Tensioning shaft; 524. Edge grinding driver; 53. Displacement driving mechanism; 531. Moving block; 532. Monitor; 54. Flip assembly; 541. Rotating jaw; 542. Electric push rod; 55. Rotating assembly; 551. Suction cup; 5511. Pipe fitting; 5512. Pipe sleeve; 552. Linear drive; 553. Rotating drive; 6. Cleaning unit; 7. Unloading unit. DETAILED DESCRIPTION

[0040] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] See also Figure 1-Figure 6As shown, a high-precision sheet metal bending processing front surface treatment device includes a processing chamber 1, in which a feeding unit 2 for conveying a sheet metal 3 is provided, and a loading unit 4, a grinding unit 5, a cleaning unit 6 and a unloading unit 7 are sequentially arranged around the feeding unit 2, wherein the grinding unit 5 includes a surface grinding mechanism 51 and an edge grinding mechanism 52, and a displacement driving mechanism 53, wherein the displacement driving mechanism 53 has a moving block 531 for installing the surface grinding mechanism 51 and the edge grinding mechanism 52, and the moving block 531 is also provided with a monitor 532 for observing the rust position on the surface of the sheet metal 3, and the surface grinding mechanism 51 includes a grinding disc 511 and a downward pressure cylinder 512 fixedly arranged on the moving block 531, and a pressure regulating assembly 513 arranged between the grinding disc 511 and the downward pressure cylinder 512, the edge grinding mechanism 52 includes a grinding belt 521 and a lifting assembly arranged on the moving block 531 and connected to the grinding belt 521, and a pressure buffer assembly 523 arranged on the lifting assembly and connected to the grinding belt 521, the surface grinding mechanism 51 and the edge grinding mechanism 52 are also respectively provided with a surface grinding driver 514 and an edge grinding driver 524, the grinding unit 5 also includes a flipping assembly 54 for flipping the sheet metal part 3, and a rotating assembly 55 for horizontally rotating the sheet metal part 3.

[0042] During the processing of the sheet metal part 3, the sheet metal part 3 to be processed is placed on the feeding unit 2 through the loading unit 4. The feeding unit 2 automatically conveys the sheet metal part 3 through the grinding unit 5, the cleaning unit 6 and the unloading unit 7 in sequence. After the sheet metal part 3 is conveyed to the grinding unit 5, the monitor 532 detects rust and other defects on the surface of the sheet metal part 3 in real time to ensure that the grinding mechanism can be accurately positioned. The surface grinding mechanism 51 starts to work, and the grinding disc 511 is pushed by the downward pressure cylinder 512 and adjusted by the pressure regulating component 513 to make the grinding disc 511 The grinding disc 511 is in close contact with the surface of the sheet metal part 3, and the rust on the surface is lightly polished to ensure that the rust is removed. The surface polishing driver 514 drives the grinding disc 511 to rotate at an appropriate speed to ensure a uniform polishing effect. According to the feedback from the monitor 532, the displacement drive mechanism 53 adjusts the position of the grinding disc 511 to ensure that the rust on the entire surface can be effectively treated. When the surface polishing of one side is completed, the flip component 54 will flip the sheet metal part 3 so that the other side faces up, and the surface polishing mechanism 51 starts again. The other side of the sheet metal part 3 is polished to ensure that the rust on both sides can be completely removed. After the surface is polished, the edge polishing mechanism 52 also starts to process the edge of the sheet metal part 3. The lifting component adjusts the height of the polishing belt 521, and combines with the displacement driving mechanism 53 to ensure that the polishing belt 521 is in close contact with the edge of the sheet metal part 3. The edge polishing driver 524 is started to drive the polishing belt 521 to process the edge at an appropriate speed. The pressure buffer component 523 ensures that the pressure of the polishing belt 521 is stable when processing the edge to avoid To avoid damaging the sheet metal part 3, after the rotating component 55 completes the grinding of one side edge, the sheet metal part 3 is horizontally rotated so that the other edges are processed one by one, and the edge grinding mechanism 52 will also cooperate to grind the other edges of the sheet metal part 3 to ensure that all edges can achieve the expected processing effect. After grinding, the sheet metal part 3 enters the cleaning unit 6 to remove the grinding dust and debris remaining on the surface and edges to ensure the cleanliness of the sheet metal part 3 in the subsequent process. After cleaning, the sheet metal part 3 is automatically sent to the next processing link through the unloading unit 7.

[0043] See also Figure 4-Figure 8As shown, the pressure regulating assembly 513 includes a rotating shaft 5131 fixedly connected to the grinding disc 511, and an upper sleeve 5132 and a lower sleeve 5133 which are sleeved on the rotating shaft 5131, a compression spring 5134 is fixedly connected between the upper sleeve 5132 and the lower sleeve 5133, the upper sleeve 5132 can move along the axial direction of the rotating shaft 5131, the lower sleeve 5133 is fixedly connected to the rotating shaft 5131, the upper sleeve 5132 and the lower sleeve 5133 are connected along the axial direction thereof by a clamping manner, an upper pressure plate 5121 which is rotatably connected to the upper sleeve 5132 is fixedly provided on the output shaft of the downward pressure cylinder 512, and a surface grinding driver 514 is arranged on the upper pressure plate 5121 and is transmission-connected to the upper sleeve 5132.

[0044] When the surface grinding mechanism 51 starts to work, the output shaft of the downward pressure cylinder 512 begins to apply force downward, the upper pressure plate 5121 is fixed on the output shaft and is rotatably connected with the upper sleeve 5132, allowing the upper sleeve 5132 to move in the axial direction, but at the same time ensuring that it can rotate freely to follow the movement of the rotating shaft 5131 and the grinding disc 511, the upper pressure plate 5121 pushes the upper sleeve 5132 to move downward until the grinding disc 511 contacts the surface of the sheet metal 3, with continuous pressure, the lower sleeve 5133 stops, and the upper sleeve 5132 continues to move downward relative to the lower sleeve 5133, and the upper sleeve 5132 transmits an appropriate amount of pressure to the grinding disc 511 under the action of the compression spring 5134, thereby adjusting the contact pressure between the grinding disc 511 and the surface of the sheet metal 3.

[0045] See also Figure 6-Figure 8 As shown, an upper transmitter 5135 and a lower receiver 5136 are respectively provided on the upper sleeve 5132 and the lower sleeve 5133, and the upper transmitter 5135 and the lower receiver 5136 are arranged corresponding to each other. When the grinding disc 511 contacts the surface of the sheet metal part 3, as the upper sleeve 5132 is continuously pressed downward, the upper sleeve 5132 moves relative to the lower sleeve 5133, and the distance between the upper transmitter 5135 and the lower receiver 5136 is detected to control the downward pressure of the grinding disc 511.

[0046] The upper transmitter 5135 and the lower receiver 5136 are respectively arranged on the upper sleeve 5132 and the lower sleeve 5133, so that the movement of the upper sleeve 5132 relative to the lower sleeve 5133 can be monitored in real time through the change of the distance between the two. When the grinding disc 511 contacts the surface of the sheet metal 3, as the upper sleeve 5132 is pressed downward, the distance between the upper transmitter 5135 and the lower receiver 5136 gradually decreases. By detecting this distance, the pressure applied by the grinding disc 511 to the surface of the sheet metal 3 can be accurately controlled. This real-time feedback mechanism can automatically adjust the downward pressure of the grinding disc 511 to ensure that the pressure is always maintained within an appropriate range, avoiding excessive grinding or insufficient pressure.

[0047] See also Figure 6-Figure 8 As shown, a ring body 5111 which is sleeved on the grinding disc 511 is fixedly provided at the lower end of the lower sleeve 5133, and a ventilation gap is left between the ring body 5111 and the grinding disc 511 for ventilation. The rotating shaft 5131 is specifically a hollow structure with an opening at the upper end, and an airway 5112 which is connected to the ventilation gap is opened between the rotating shaft 5131 and the lower sleeve 5133.

[0048] When the surface grinding mechanism 51 is started, air enters the hollow rotating shaft 5131 through the opening of the rotating shaft 5131, and flows along the airway 5112 to the circulation gap between the grinding disc 511 and the ring body 5111. The air flows here, taking away the heat and dust generated by the grinding process, allowing the air to be discharged from the circulation gap around the grinding disc 511, forming an effective air circulation system, which helps to keep the temperature of the grinding disc 511 within a reasonable range and prevent the dust generated during the grinding process from accumulating on or around the grinding disc 511.

[0049] See also Figure 4-Figure 6 , Fig. 9 and Fig.10 As shown, the lifting assembly includes a lifting frame body 522 and a lifting cylinder 5221 for driving the lifting frame body 522 to move vertically. The lifting frame body 522 is provided with a driving wheel 5222 and a driven wheel 5223 for connecting the grinding belt 521. The distance between the driving wheel 5222 and the driven wheel 5223 is greater than the length of the sheet metal part 3. The driving wheel 5222 is connected to the edge grinding driver 524 in transmission.

[0050] The distance between the driving wheel 5222 and the driven wheel 5223 is designed to be greater than the length of the sheet metal 3, so that the grinding belt 521 can cover the edge area on each side of the sheet metal 3 to achieve comprehensive grinding. The driving wheel 5222 is connected to the edge grinding driver 524, driving the grinding belt 521 to continuously circulate between the driving wheel 5222 and the driven wheel 5223. When the lifting cylinder 5221 adjusts the height of the lifting frame 522, the grinding belt 521 also moves up and down, thereby prompting the grinding belt 521 to move to a height that can contact the edge of the sheet metal 3. The edge grinding driver 524 drives the grinding belt 521 to move through the driving wheel 5222, and the grinding belt 521 contacts the edge of the sheet metal 3 to achieve continuous grinding. Since the distance between the driving wheel 5222 and the driven wheel 5223 is large enough, the grinding belt 521 can cover the edge length of each side of the sheet metal 3, making the edge grinding process efficient and uniform.

[0051] See also Figure 6 , Fig. 9 and Fig.10As shown, the pressure buffer assembly 523 includes a tensioning wheel 5231 disposed on the lifting frame 522 for the grinding belt 521 to be sleeved thereon, and a buffer connection piece is provided between the tensioning wheel 5231 and the lifting frame 522 .

[0052] The buffer connector is located between the tensioning wheel 5231 and the lifting frame 522. Its main function is to provide a certain elastic buffer, which can relieve the pressure of the contact between the grinding belt 521 and the edge of the sheet metal part 3 during the grinding process, control the grinding force, and prevent the edge of the sheet metal part 3 from curling due to excessive pressure.

[0053] See also Figure 6 , Fig. 9 and Fig.10 As shown, the buffer connection member has a buffer spring 5232 arranged along the direction of the grinding belt 521 portion between the vertical driving wheel 5222 and the driven wheel 5223, and the lifting frame body 522 is respectively provided with a fixed block 5233 fixedly arranged on the lifting frame body 522 and a movable block 5234 movably arranged on the lifting frame body 522, the buffer spring 5232 is fixedly connected between the fixed block 5233 and the movable block 5234, and the movable block 5234 is provided with a tensioning shaft 5235 for rotationally connecting the tensioning wheel 5231, and a guide opening for the tensioning shaft 5235 to slide therein is opened on the lifting frame body 522 along the axial direction of the buffer spring 5232.

[0054] When the grinding belt 521 contacts the edge of the sheet metal part 3, as the grinding belt 521 continues to apply pressure, the tensioning shaft 5235 on the tensioning wheel 5231 will drive the movable block 5234 to slide along the guide opening, compressing the buffer spring 5232. Through the movement of the movable block 5234, the elasticity of the buffer spring 5232 is utilized to adjust the tension of the grinding belt 521, ensuring that the pressure during the grinding process is always maintained within an appropriate range.

[0055] See also Figure 4 , Figure 5 , Fig.11 and Fig.12 As shown, the feeding unit 2 has a mold 21 for placing the sheet metal part 3, and the mold 21 has grooves for allowing the short side and the long side of the sheet metal part 3 to face the edge grinding mechanism 52 respectively. When the edge grinding mechanism 52 grinds the edge of the sheet metal part 3, the sheet metal part 3 is controlled to rotate and embed into the corresponding groove through the rotating component 55, so that the process of grinding the edge of the sheet metal part 3 remains stable.

[0056] When the sheet metal part 3 is placed on the mold 21, the edges of the sheet metal part 3 will be embedded in these grooves, thereby providing a stable foundation for the subsequent grinding process. The design of the grooves ensures that the sheet metal part 3 will not be displaced by external forces during the grinding process, thereby maintaining the grinding accuracy. The rotating component 55 can cooperate with the mold 21 to successively rotate the different edges of the sheet metal part 3 to the working position of the edge grinding mechanism 52, ensuring that each edge of the sheet metal part 3 can contact the edge grinding mechanism 52 at a predetermined position, ensuring effective grinding while also ensuring the stability of the sheet metal part 3 under the limitation of the grooves. The mold 21 also has a vacuum channel 211 that can adsorb the sheet metal part 3, and can firmly fix the sheet metal part 3 on the mold 21 through adsorption. When the sheet metal part 3 is placed in the groove of the mold 21, the vacuum channel 211 generates negative pressure to press the surface of the sheet metal part 3 against the mold 21, thereby further preventing sliding or displacement during the grinding process.

[0057] See also Figure 4 , Figure 5 and Figure 11-13 As shown, a limiting plate 22 is provided on the side of the mold 21 facing the edge grinding mechanism 52 , and a toggle assembly 23 capable of driving the limiting plate 22 to approach or move away from the mold 21 is provided between the flip assembly 54 and the limiting plate 22 .

[0058] The limit plate 22 can move vertically relative to the mold 21. The feeding unit 2 has a bottom plate 212 for supporting the mold 21. The limit plate 22 has a guide rod 221 that vertically passes through the bottom plate 212 and extends downward. The lower end of the guide rod 221 is provided with an end sleeve 222. A return spring 2221 is fixed between the end sleeve 222 and the bottom plate 212. The toggle assembly 23 includes a toggle plate 231 and a pull-down cylinder 232 for driving the toggle plate 231 to move vertically. The edge of the end sleeve 222 has a spring that can contact the toggle plate 231. The abutment edge 2222, when the reset spring 2221 is in a state without external force, the limit plate 22 and the mold 21 are in a connected state, and when the feeding unit 2 moves the sheet metal 3 to the position of the grinding mechanism, the abutment edge 2222 on the end sleeve 222 is located below the toggle plate 231, and as the pull-down cylinder 232 drives the toggle plate 231 to move downward, the end sleeve 222 follows and moves downward, thereby indirectly driving the limit plate 22 to move downward and away from the mold 21, so that the edge grinding mechanism 52 can grind the edge of the sheet metal 3.

[0059] The flipping assembly 54 is composed of a rotating jaw 541 and an electric push rod 542. When the limit plate 22 is away from the mold 21, the electric push rod 542 drives the rotating jaw 541 to move toward the sheet metal part 3 until the rotating jaw 541 clamps the sheet metal part 3, and then the electric push rod 542 drives the rotating jaw 541 to reset, so that the sheet metal part 3 is separated from the mold 21 to an empty area. At this time, the rotating jaw 541 controls the sheet metal part 3 to rotate 180°, thereby completing the flipping of the sheet metal part 3. Subsequently, the sheet metal part 3 is reinserted into the groove of the mold 21 through the electric push rod 542, and the limit plate 22 is controlled to return to its position through the toggle assembly 23, and the sheet metal part 3 is limited again to ensure the stability of the surface of the sheet metal part 3 during the polishing process.

[0060] The rotating assembly 55 is composed of a suction cup 551, a linear drive 552 and a rotating drive 553. The suction cup 551 has a pipe fitting 5511 extending upward through the upper pressure plate 5121. A lower pressure plate 5122 slidingly sleeved on the lower sleeve 5133 is provided below the upper pressure plate 5121. A hollow column 5123 is fixedly provided between the upper pressure plate 5121 and the lower pressure plate 5122. The lower pressure plate 5122 is used to maintain the stability of the lower sleeve 5133 during the high-speed rotation of the grinding disc 511. A pipe sleeve 5512 rotatably arranged in the hollow column 5123 is sleeved on the pipe fitting 5511. The pipe fitting 5511 can move along the axial direction of the pipe sleeve 5512. The pipe fitting 5511 and the pipe sleeve 5512 are connected in a clamping manner along the axial direction thereof. When the displacement driving mechanism 53 drives the suction cup 551 to move After reaching the center position of the sheet metal 3, the suction cup 551 is controlled to move downward and contact with the sheet metal 3 by the linear drive 552. The linear drive 552 controls the movement of the suction cup 551 in an electromagnetic way. After the suction cup 551 adsorbs the sheet metal 3, it moves upward through the linear drive 552 to make the sheet metal 3 separate from the mold 21. Then, the pipe sleeve 5512 is driven to rotate by the rotary drive 553, thereby indirectly driving the pipe 5511 to rotate, causing the sheet metal 3 to rotate 90°, and then the sheet metal 3 is put back into the corresponding groove of the mold 21 to facilitate the edge grinding mechanism 52 to grind the sheet metal 3. The sheet metal 3 is continuously rotated 90° in the manner described above until all edges of the sheet metal 3 are ground, and after the sheet metal 3 is rotated, it is put back into the groove of the mold 21 to ensure the stability of the edge of the sheet metal 3 during the grinding process.

[0061] The method for pre-processing surface of high-precision sheet metal parts during bending is applied to the equipment for pre-processing surface of high-precision sheet metal parts during bending, and comprises the following steps:

[0062] S1, start the loading unit 4 to place the sheet metal part 3 on the feeding unit 2;

[0063] S2, start the feeding unit 2 to move the sheet metal part 3 to the grinding unit 5, and grind the rust on the sheet metal part 3 in all directions under the operation of the surface grinding mechanism 51 and the edge grinding mechanism 52;

[0064] S3, start the feeding unit 2 to move the sheet metal part 3 to the cleaning unit 6, and clean the surface of the sheet metal part 3;

[0065] S4, start the unloading unit 7 to take out the sheet metal part 3 from the feeding unit 2 and send it to the next process.

[0066] During the operation of the surface grinding mechanism 51 of the present invention, as the monitor 532 observes the rust on the surface of the sheet metal 3, the grinding disc 511 can be controlled to grind the rusted area instead of the non-rusted area, thereby preventing the sheet metal 3 from becoming thinner. The pressure of the grinding disc 511 is controlled by the pressure regulating component 513, so that the grinding disc 511 slightly grinds the sheet metal 3, and the situation in which the sheet metal 3 becomes thinner or dented due to excessive grinding is avoided. During the operation of the edge grinding mechanism 52, the pressure of the grinding belt 521 in contact with the edge of the sheet metal 3 is controlled by the pressure buffer component 523, so that the rust on the edge of the sheet metal 3 is completely removed while the deformation of the edge of the sheet metal 3 is avoided, thereby improving the effect of all-round grinding of the sheet metal 3.

[0067] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A high-precision sheet metal part bending pre-surface treatment device, comprising a processing chamber (1), wherein the processing chamber (1) is provided with a feeding unit (2) for conveying a sheet metal part (3), and a loading unit (4), a grinding unit (5), a cleaning unit (6) and a unloading unit (7) which are sequentially arranged around the feeding unit (2); It is characterized in that The grinding unit (5) comprises a surface grinding mechanism (51) and an edge grinding mechanism (52), and a displacement driving mechanism (53); the displacement driving mechanism (53) comprises a moving block (531) for mounting the surface grinding mechanism (51) and the edge grinding mechanism (52); the moving block (531) is also provided with a monitor (532) for observing the position of rust on the surface of the sheet metal part (3); The surface grinding mechanism (51) comprises a grinding disc (511) and a downward pressure cylinder (512) fixedly arranged on a moving block (531), and a pressure regulating component (513) arranged between the grinding disc (511) and the downward pressure cylinder (512); the edge grinding mechanism (52) comprises a grinding belt (521) and a lifting component arranged on the moving block (531) and connected to the grinding belt (521); and a pressure buffer component (523) arranged on the lifting component and connected to the grinding belt (521); the surface grinding mechanism (51) and the edge grinding mechanism (52) are further provided with a surface grinding driver (514) and an edge grinding driver (524), respectively; The grinding unit (5) further comprises a turning component (54) for turning over the sheet metal part (3), and a rotating component (55) for horizontally rotating the sheet metal part (3); The pressure regulating assembly (513) comprises a rotating shaft (5131) fixedly connected to the grinding disc (511), and an upper sleeve (5132) and a lower sleeve (5133) sleeved on the rotating shaft (5131); a compression spring (5134) is fixedly connected between the upper sleeve (5132) and the lower sleeve (5133); the upper sleeve (5132) can move along the axis direction of the rotating shaft (5131); the lower sleeve (5133) is fixedly connected to the rotating shaft (5131); the upper sleeve (5132) and the lower sleeve (5133) are connected in a clamping manner along the axis direction thereof; an upper pressure plate (5121) is fixedly provided on the output shaft of the downward pressure cylinder (512) to which the upper sleeve (5132) is rotatably connected; and a surface grinding driver (514) is arranged on the upper pressure plate (5121) and is drivingly connected to the upper sleeve (5132); An upper transmitter (5135) and a lower receiver (5136) are respectively provided on the upper sliding sleeve (5132) and the lower sliding sleeve (5133). The upper transmitter (5135) and the lower receiver (5136) are arranged corresponding to each other. When the grinding disc (511) contacts the surface of the sheet metal part (3), as the upper sliding sleeve (5132) continues to press downward, the upper sliding sleeve (5132) moves relative to the lower sliding sleeve (5133). The distance between the upper transmitter (5135) and the lower receiver (5136) is detected to control the downward pressure of the grinding disc (511).

2. The high-precision sheet metal bending pre-surface treatment equipment according to claim 1 is characterized in that: A ring body (5111) is fixedly provided at the lower end of the lower sleeve (5133) and is sleeved on the grinding disc (511). A ventilation gap is left between the ring body (5111) and the grinding disc (511). The rotating shaft (5131) is specifically a hollow structure with an opening at the upper end. An air passage (5112) connected to the ventilation gap is opened between the rotating shaft (5131) and the lower sleeve (5133).

3. The high-precision sheet metal bending pre-surface treatment equipment according to claim 1 is characterized in that: The lifting assembly comprises a lifting frame (522) and a lifting cylinder (5221) for driving the lifting frame (522) to move vertically. The lifting frame (522) is provided with a driving wheel (5222) and a driven wheel (5223) for connecting a grinding belt (521). The distance between the driving wheel (5222) and the driven wheel (5223) is greater than the length of the sheet metal part (3). The driving wheel (5222) is in driving connection with an edge grinding driver (524).

4. The high-precision sheet metal bending pre-surface treatment equipment according to claim 3 is characterized in that: The pressure buffer assembly (523) comprises a tensioning wheel (5231) arranged on the lifting frame (522) for the grinding belt (521) to be sleeved thereon, and a buffer connecting piece is provided between the tensioning wheel (5231) and the lifting frame (522).

5. The high-precision sheet metal bending pre-surface treatment equipment according to claim 4 is characterized in that: The buffer connection member comprises a buffer spring (5232) arranged along the direction of the grinding belt (521) portion between the vertical driving wheel (5222) and the driven wheel (5223); a fixed block (5233) fixedly arranged on the lifting frame body (522) and a movable block (5234) movably arranged on the lifting frame body (522) are respectively arranged on the lifting frame body (522); the buffer spring (5232) is fixedly connected between the fixed block (5233) and the movable block (5234); a tensioning shaft (5235) rotatably connected to the tensioning wheel (5231) is arranged on the movable block (5234); and a guide opening for the tensioning shaft (5235) to slide therein is opened on the lifting frame body (522) along the axial direction of the buffer spring (5232).

6. The high-precision sheet metal bending pre-surface treatment equipment according to claim 1 is characterized in that: The feeding unit (2) has a mold (21) for placing a sheet metal part (3), and the mold (21) has grooves capable of allowing the short side and the long side of the sheet metal part (3) to face the edge grinding mechanism (52) respectively. When the edge grinding mechanism (52) grinds the edge of the sheet metal part (3), the sheet metal part (3) is controlled to rotate and embed into the corresponding groove through the rotating component (55), so that the process of grinding the edge of the sheet metal part (3) remains stable.

7. The high-precision sheet metal bending pre-surface treatment equipment according to claim 6 is characterized in that: A limiting plate (22) is provided on the side of the mold (21) facing the edge grinding mechanism (52), and a toggle assembly (23) capable of driving the limiting plate (22) to move closer to or away from the mold (21) is provided between the flip assembly (54) and the limiting plate (22).

8. A method for pre-processing surface treatment of high-precision sheet metal parts during bending, applied to a device for pre-processing surface treatment of high-precision sheet metal parts during bending as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1, starting the loading unit (4) to place the sheet metal part (3) on the feeding unit (2); S2, starting the feeding unit (2) to move the sheet metal part (3) to the grinding unit (5), and grinding the rust on the sheet metal part (3) in all directions under the operation of the surface grinding mechanism (51) and the edge grinding mechanism (52); S3, starting the feeding unit (2) to move the sheet metal part (3) to the cleaning unit (6) to clean the surface of the sheet metal part (3); S4, starting the unloading unit (7) to take the sheet metal part (3) out of the feeding unit (2) and send it to the next process.

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