Metal plate box polishing production line

Abstract

The invention relates to a sheet metal box polishing production line which comprises a feeding table, a feeding conveying mechanism, a box body bottom corner and side corner polishing mechanism, a box body upper end plane polishing mechanism, a discharging table and a control system. The feeding table, the feeding conveying mechanism, the box body bottom corner and side corner grinding mechanism, the box body upper end plane grinding mechanism and the discharging table are sequentially connected in the sheet metal box conveying direction. The feeding table is used for temporarily placing and supporting the sheet metal box before polishing; the feeding conveying mechanism is used for conveying the metal plate box to the inlet end of the box body bottom corner and side corner grinding mechanism. The bottom corner and side corner grinding mechanism is used for grinding welding seams of two bottom corners and four vertical corners on the left side and the right side of the metal plate box; the box upper end plane grinding mechanism is used for grinding welding seams of the connecting portions of the two adjacent edges of the box upper end plane. And the discharging table is used for temporarily placing and supporting the polished metal plate box. The grinding production efficiency can be greatly improved, and the welding seam grinding uniformity is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of force control grinding equipment, and particularly relates to a grinding production line for sheet metal boxes. Background Art

[0002] A sheet metal box is a chassis formed by using comprehensive cold processing technology for metal sheets and cooling. Sheet metal chassis have the characteristics of light weight, high strength, electromagnetic shielding, low cost, etc., and are currently widely used in the fields of electronic appliances, communications, computers, etc. Among them, grinding is an important process after the welding process of the sheet metal box, and the grinding quality plays a key role in the forming quality of the product. For a sheet metal box with welded corners at all four corners, the current grinding method is as follows: manual grinding or using a manipulator to drive a grinding tool to grind the sides and bottom corners of the corners one by one, and then grind the upper plane. During the grinding process, manual assistance is required to install the sheet metal box in a different position. The existing grinding method has the problem of low grinding efficiency and cannot meet the mass production requirements of products. Summary of the Invention

[0003] The present invention aims at the above technical problems and provides a grinding production line for sheet metal boxes that can greatly improve the grinding production efficiency, is suitable for grinding and processing sheet metal boxes of various sizes, and ensures the uniformity of weld grinding.

[0004] The above object of the present invention is achieved by the following technical solutions:

[0005] A grinding production line for sheet metal boxes includes a loading table, a loading conveying mechanism, a grinding mechanism for the bottom corners and side corners of the box body, a grinding mechanism for the upper plane of the box body, a unloading table and a control system; along the conveying direction of the sheet metal box, the loading table, the loading conveying mechanism, the grinding mechanism for the bottom corners and side corners of the box body, the grinding mechanism for the upper plane of the box body and the unloading table are sequentially connected and arranged;

[0006] The loading table is used to temporarily support the sheet metal box before grinding, and its support height is the same as the conveying height of the loading conveying mechanism;

[0007] The loading conveying mechanism adopts a belt conveying mechanism with adjustable conveying width and is used to automatically convey the sheet metal box to the inlet end of the grinding mechanism for the bottom corners and side corners of the box body;

[0008] The bottom corner and side corner grinding mechanism is used to realize the grinding process of the welds at the two bottom corners and four vertical corners on the left and right sides of the sheet metal box. The bottom corner and side corner grinding mechanism includes a belt conveyor mechanism with adjustable conveying width and liftable conveying height, a first fixing device for the sheet metal box, two sets of grinding manipulators at the first station, and a swing head type grinding execution mechanism. The first fixing device for the sheet metal box is arranged between the left and right belt conveyor mechanisms of the bottom corner and side corner grinding mechanism, and fixes the sheet metal box at the first station by magnetic force. The two sets of grinding manipulators at the first station are respectively arranged outside the left and right sides of the belt conveyor mechanism of the bottom corner and side corner grinding mechanism, and the output ends of the two sets of grinding manipulators at the first station are respectively connected to the outer shell of a swing arm head type grinding execution mechanism.

[0009] The upper plane grinding mechanism of the box body is used to realize the grinding of the welds at the connecting parts of the two adjacent sides of the upper plane of the box body. The upper plane grinding mechanism of the box body includes a belt conveyor mechanism with adjustable conveying width and liftable conveying height, a second fixing device for the sheet metal box, two sets of grinding manipulators at the second station, and a flexible constant force control grinding mechanism. The second fixing device for the sheet metal box is arranged between the left and right belt conveyor mechanisms of the upper plane grinding mechanism of the box body, and fixes the sheet metal box at the second station by magnetic force. The two sets of grinding manipulators at the second station are respectively arranged outside the left and right sides of the belt conveyor mechanism of the upper plane grinding mechanism of the box body, and the output ends of the two sets of grinding manipulators at the second station are respectively connected to the outer shell of a flexible constant force control grinding mechanism.

[0010] The blanking table is used to temporarily support the sheet metal box after grinding treatment.

[0011] Moreover, the loading conveyor mechanism includes a first base, a left first conveying unit, a right first conveying unit, and a first conveying width adjusting mechanism. The lower front ends of the left first conveying unit and the right first conveying unit are connected to the first base through a set of linear guide pairs located at the front. The lower rear ends of the left first conveying unit and the right first conveying unit are connected to the first base through a set of linear guide pairs located at the rear. The upper part of the left first conveying unit is provided with a left first belt conveyor mechanism, and a left first baffle is arranged at the upper end gap of the left first belt conveyor mechanism. The upper part of the right first conveying unit is provided with a right first belt conveyor mechanism, and a right first baffle is arranged at the upper end gap of the right first belt conveyor mechanism. The first conveying width adjusting mechanism adopts a lead screw nut mechanism driven by a servo motor. The lead screw is a two-way lead screw with reverse threads at both ends, and the two nut parts cooperating with the lead screw are respectively fixed to the lower ends of the vertical plates of the left first conveying unit and the right first conveying unit.

[0012] Moreover, the bottom corner and side corner grinding mechanism includes a second base, a left second conveying unit, a right second conveying unit, a second conveying width adjustment mechanism, the first fixing device of the sheet metal box, two first-station grinding manipulators, and the swing head type grinding execution mechanism; the connection manners of the left second conveying unit and the right second conveying unit with the second base are the same as those of the left first conveying unit and the right first conveying unit with the first base, and the second conveying width adjustment mechanism is the same as the first conveying width adjustment mechanism; a left second belt conveying mechanism is arranged above the conveyor belt of the left second conveying unit, and the lower end of the frame of the left second belt conveying mechanism is connected to the lower vertical frame part of the left second conveying unit through a vertically arranged lifting drive cylinder to realize the lifting control of the left second belt conveying mechanism; a right second belt conveying mechanism is arranged at the upper end of the right second conveying unit; the lower end of the frame of the right second belt conveying mechanism is connected to the lower vertical frame part of the right second conveying unit through a vertically arranged lifting drive cylinder to realize the lifting control of the right second belt conveying mechanism.

[0013] Moreover, a left second baffle and a right second baffle are respectively arranged above the conveyor belt of the left second belt conveying mechanism and above the conveyor belt of the right second belt conveying mechanism along the belt conveying direction. Both the left second baffle and the right second baffle adopt a three-section structure arranged front and back. Among them, the middle sections of the left second baffle and the right second baffle are respectively arranged at the positions directly opposite to the left and right sides of the first fixing device of the sheet metal box. Both are movable baffles that can move along the left and right directions and are controlled by their respective baffle drive mechanisms; the front baffles and the rear baffles of the left second baffle and the right second baffle are both supported by fixed brackets.

[0014] Moreover, the first fixing device of the sheet metal box is composed of support vertical frames arranged on the left and right sides and two parallel electromagnetic strips fixed to the upper ends of the two support vertical frames. The lower ends of the two support vertical frames are fixedly connected to the upper end of the second base; the distance between the two support vertical frames is less than the length of the sheet metal box; front stoppers that can be controlled to lift are embedded at the upper ends of the support vertical frames on the left and right sides in front of the electromagnetic strips.

[0015] Moreover, the upper plane grinding mechanism of the box body includes a third base, a left third conveying unit, a right third conveying unit, a third conveying width adjusting mechanism, the second fixing device for the sheet metal box, two second-station grinding manipulators, and the flexible constant force control grinding mechanism; the third base, the left third conveying unit, the right third conveying unit, the third conveying width adjusting mechanism, and the second fixing device for the sheet metal box respectively adopt the same structural form as the second base, the left second conveying unit, the right second conveying unit, the second conveying width adjusting mechanism, and the first fixing device for the sheet metal box; above the conveyor belt of the left third belt conveying mechanism and above the conveyor belt of the right third belt conveying mechanism along the conveying direction, a left third baffle and a right third baffle are respectively arranged; the left third baffle and the right third baffle respectively adopt the same structural form as the left second baffle and the right second baffle.

[0016] Moreover, a first sensor is installed on the outer side near the front end of the upper part of the first conveying unit on one side of the loading conveying mechanism; a second sensor is installed on the outer side near the front end of the rear section of the second baffle on one side of the bottom corner and side corner grinding mechanism; a third sensor is embedded on the rear side of at least one front stop block of the first fixing device for the sheet metal box; a fourth sensor is installed on the outer side near the front end of the rear section of the third baffle of the upper plane grinding mechanism of the box body; a fifth sensor is embedded on the rear side of at least one front stop block of the second fixing device for the sheet metal box.

[0017] Moreover, grinding actuator spare parts platforms are arranged on both the left and right sides of the bottom corner and side corner grinding mechanism, and at least one set of spare swing-type grinding actuators is stored on each of the grinding actuator spare parts platforms on both sides.

[0018] Moreover, a set of tool holders is arranged on each of the left and right sides outside the upper plane grinding mechanism of the box body, and multiple spare grinding wheels are placed on each of the two tool holders.

[0019] The advantages and positive effects of the present invention are:

[0020] 1. The present invention automatically conveys the sheet metal box to the bottom corner and side corner grinding mechanism through the feeding and conveying mechanism. When the sheet metal box is conveyed to the first grinding station, it is fixed by the adsorption method at the lower end. The two groups of first station grinding manipulators arranged on the left and right drive the swing head type grinding execution mechanism, which can realize the rapid grinding processing of the two sides of the bottom corner and side corner. The swing head type abrasive belt grinding method ensures the uniformity and consistency of the corner grinding. After the grinding processing of the two sides of the bottom corner and side corner is completed, it is conveyed to the upper plane grinding mechanism of the box body. When the sheet metal box is conveyed to the second grinding station, it is fixed by the adsorption method at the lower end. The two groups of second station grinding manipulators arranged on the left and right drive the flexible constant force control grinding mechanism, which can realize the rapid grinding processing of the weld seam at the connecting part of the two adjacent sides of the upper plane of the box body. The flexible constant force control grinding method ensures the uniformity and consistency of the grinding. Finally, it is output through the blanking table. The present invention realizes the grinding processing of all weld seams on the sheet metal box, greatly improves the grinding processing efficiency, and also ensures the uniformity and consistency of the weld seam grinding, meeting the requirements of mass production.

[0021] 2. The feeding and conveying mechanism, the bottom corner and side corner grinding mechanism, and the upper plane grinding mechanism of the box body of the present invention all adopt the structural form with adjustable conveying width, which can meet the grinding processing of sheet metal boxes of various sizes and achieve better applicability. Brief Description of the Drawings

[0022] Figure 1 is the top view of the overall structure of the present invention;

[0023] Figure 2 is the three-dimensional view of the overall structure of the present invention;

[0024] Figure 3 is the structural diagram of the feeding and conveying mechanism of the present invention;

[0025] Figure 4 is the structural schematic diagram of the device for conveying and fixing the box body in the first grinding operation area of the present invention (the device for conveying and fixing the box body in the second grinding operation area refers to this figure);

[0026] Figure 5 is the combined view of the first station grinding manipulator and the swing head type grinding execution mechanism of the present invention;

[0027] Figure 6 is the combined view of the second station grinding manipulator and the flexible constant force control grinding mechanism of the present invention;

[0028] Figure 7 is the schematic diagram of the grinding parts of the sheet metal box involved in the present invention;

[0029] Figure 8 is the reference view of the use state of grinding the sheet metal box by the sheet metal box grinding production line of the present invention.

[0030] In the figure: 1. Loading table; 2. Electric control box; 3. Loading conveyor mechanism; 3.1. First base; 3.2. Left first conveying unit; 3.2.1. Left first belt conveying mechanism; 3.3. Right first conveying unit; 3.3.1. Right first belt conveying mechanism; 3.4. First linear track; 3.5. Servo motor; 3.6. Lead screw; 3.7. Left first baffle; 3.8. Right first baffle; 3.9. First sensor; 4. Spare part table for grinding execution mechanism; 5. Grinding mechanism for bottom and side corners of box body; 5.1. Second base; 5.2. Left second conveying unit; 5.2.1. Left second belt conveying mechanism; 5.2.2. Lifting drive cylinder; 5.3. Right second conveying unit; 5.3.1. Right second belt conveying mechanism; 5.3.2. Lifting drive cylinder; 5.4. Second sensor; 5.5. First fixing device for sheet metal box; 5.5.1. Electromagnetic head; 5.6. Front stop block; 5.7. Baffle support; 5.8. Baffle drive cylinder; 5.9. Linear guide pair; 5.10. First station grinding manipulator; 5.11. Swing head type grinding execution mechanism; 6. Grinding mechanism for upper end plane of box body; 6.1. Second station grinding manipulator; 6.2. Flexible constant force control grinding mechanism; 7. Tool rest; 8. Unloading table. Specific implementation mode

[0031] The structure of the present invention will be further described below with reference to the accompanying drawings and through embodiments. It should be noted that this embodiment is narrative rather than restrictive.

[0032] A grinding production line for a sheet metal box, please refer to Figures 1-8 , and its inventive point is: including a loading table 1, a loading conveyor mechanism 3, a grinding mechanism 5 for the bottom and side corners of the box body, a grinding mechanism 6 for the upper end plane of the box body, and an unloading table 8. Along the conveying direction of the sheet metal box, the loading table, the loading conveyor mechanism, the grinding mechanism for the bottom and side corners of the box body, the grinding mechanism for the upper end plane of the box body, and the unloading table are sequentially connected and arranged.

[0033] Loading table:

[0034] The loading table is used to realize the temporary placement and support of the sheet metal box before grinding, and its support height is the same as the conveying height of the loading conveyor mechanism. In the present invention, the loading table is composed of a table body and support rollers arranged in sequence along the front-rear direction on the upper end of the table body. The support rollers are rotatably supported on the upper end of the table body, and the sheet metal box on the loading table is pushed to the inlet end of the loading conveyor mechanism manually. A driving mechanism can also be installed at the end of the support roller, and the support roller is driven to rotate by the driving mechanism to automatically convey the sheet metal box to the inlet end of the loading conveyor mechanism.

[0035] Loading conveyor mechanism:

[0036] The feeding and conveying mechanism adopts a belt conveying mechanism, and can be adjusted adaptively in width according to the size of the sheet metal box. It includes a first base 3.1, a left first conveying unit 3.2, a right first conveying unit 3.3, and a first conveying width adjusting mechanism.

[0037] On the front and rear parts of the upper end of the first base, a first linear track 3.4 arranged in the left-right direction is fixedly installed respectively. The lower end of the left first conveying unit is movably connected to the left ends of the two first linear guide rails respectively through front and rear support sliders; the lower end of the right first conveying unit is movably connected to the right ends of the two first linear guide rails respectively through front and rear support sliders. The upper part of the left first conveying unit is provided with a left first belt conveying mechanism 3.2.1, and a left first baffle 3.7 is arranged at an interval above the left first belt conveying mechanism. The upper part of the right first conveying unit is provided with a right first belt conveying mechanism 3.3.1, and a right first baffle 3.8 is arranged at an interval above the right first belt conveying mechanism. The left first belt conveying mechanism and the right first belt conveying mechanism cooperate to realize the backward conveying of the sheet metal box, and its conveying height is a fixed height. The left first baffle and the right first baffle are used to realize the guiding function of the sheet metal box during the conveying process.

[0038] The first conveying width adjusting mechanism can adopt a lead screw nut mechanism driven by a servo motor 3.5. The lead screw 3.6 is a bidirectional lead screw with reverse threads at both ends. The two nut parts cooperating with the lead screw are respectively fixed to the lower ends of the vertical plates of the left first conveying unit and the right first conveying unit. By rotating the lead screw, the left first conveying unit and the right first conveying unit can be driven to move towards each other to reduce the distance between them to meet the conveying requirements of small-sized sheet metal boxes, or driven to move in the opposite direction to increase the distance between them to meet the conveying requirements of large-sized sheet metal boxes.

[0039] Bottom corner and side corner grinding mechanism:

[0040] The bottom corner and side corner grinding mechanism is used to realize the grinding process after welding of the two bottom corners and four vertical corners on the left and right sides of the sheet metal box. It mainly includes a second base 5.1, a left second conveying unit 5.2, a right second conveying unit 5.3, a second conveying width adjusting mechanism, a first sheet metal box fixing device 5.5, two groups of first-station grinding manipulators 5.10, and a swing head type grinding execution mechanism 5.11. Among them, the second base, the left second conveying unit, the right second conveying unit, the second conveying width adjusting mechanism, and the first sheet metal box fixing device are combined to realize the conveying and fixing of the box body in the first grinding operation section.

[0041] The connection methods of the second conveying unit on the left side, the second conveying unit on the right side and the second base are the same as those of the first conveying unit on the left side, the first conveying unit on the right side and the first base. The second conveying width adjustment mechanism is the same as the first conveying width adjustment mechanism, and will not be elaborated here.

[0042] A second belt conveying mechanism 5.2.1 on the left side is arranged on the upper part of the second conveying unit on the left side. The lower end of the frame of the second belt conveying mechanism on the left side is connected to the lower vertical frame part of the second conveying unit on the left side through a vertically arranged lifting drive cylinder 5.2.2, so as to realize the lifting control of the second belt conveying mechanism on the left side. A second belt conveying mechanism 5.3.1 is arranged at the upper end of the second conveying unit on the right side. The lower end of the frame of the second conveying mechanism on the right side is connected to the lower vertical frame part of the second conveying unit on the right side through a vertically arranged lifting drive cylinder 5.3.2, so as to realize the lifting control of the second belt conveying mechanism on the right side.

[0043] The first fixing device for the sheet metal box is integrally arranged between the second conveying unit on the left side and the second conveying unit on the right side, and is used to fix the sheet metal box at the set first grinding station, and four vertical corners and bottom corners of the sheet metal box need to be exposed. The first fixing device for the sheet metal box is composed of supporting vertical frames arranged on the left and right sides and two parallel electromagnetic strips 5.5.1 fixed to the upper ends of the two supporting vertical frames. The lower ends of the two supporting vertical frames are fixedly connected to the upper end of the second base. The distance between the two supporting vertical frames is less than the length of the sheet metal box. When the bottom of the sheet metal box is adsorbed on the upper ends of the two electromagnetic strips, a grinding operation space for the manipulator on the two bottom corners of the sheet metal box is reserved. Liftable front stoppers 5.6 are embedded in the front sides of the electromagnetic strips at the upper ends of the supporting vertical frames on the left and right sides, and the lifting of the front stoppers can be realized by means of cylinder driving or the like.

[0044] A second baffle on the left side and a second baffle on the right side are respectively arranged above the conveyor belt of the second belt conveying mechanism on the left side and above the conveyor belt of the second belt conveying mechanism on the right side along the belt conveying direction. Both the second baffle on the left side and the second baffle on the right side adopt a three-section structure arranged front and back. Among them, the middle sections of the second baffle on the left side and the second baffle on the right side are respectively arranged at the positions directly opposite to the left and right sides of the first fixing device for the sheet metal box, and both adopt movable baffles that can move in the left and right directions and are controlled by their respective baffle drive mechanisms. The front sections and the rear sections of the second baffle on the left side and the second baffle on the right side are both supported by fixed brackets, playing a guiding role for the sheet metal box during the forward conveying process.

[0045] The above baffle driving mechanism mainly consists of a baffle bracket 5.7, two groups of linear guide pairs 5.9, and a baffle driving cylinder 5.8. The baffle bracket is connected to the outer side of the middle section of the corresponding baffle. The lower part of the baffle bracket is connected to the two sliders of the linear guide pair. The guide rails of the two linear guide pairs are fixedly installed on the guide rail bracket along the left and right directions. The guide rail bracket is connected to the side part of the frame of the corresponding belt conveying mechanism. The baffle driving cylinder is fixed on the guide rail bracket, and the telescopic direction of its cylinder rod is set along the left and right directions and is fixedly connected to the baffle bracket.

[0046] Two groups of first-station grinding manipulators are respectively arranged outside the left and right sides of the second base. Interfaces connected to the outer shell of the swing-arm head type grinding actuator are provided at the output ends of the two groups of first-station grinding manipulators to realize the installation of the swing-arm head type grinding actuator. For the specific structural form of the swing-arm head type grinding actuator in this patent application, please refer to the swing-arm head type grinding actuator disclosed in the prior patent application "Application No.: 2024103176343, Name: A Swing-Head Type Belt Sander". Just install the prior swing-arm head type grinding actuator in a housing body and set an interface on the housing body to cooperate with the first-station grinding manipulator. Two groups of first-station grinding manipulators are respectively connected to a swing-arm head type grinding actuator to simultaneously grind the vertical corners and bottom corners on the left and right sides.

[0047] Box upper-end plane grinding mechanism:

[0048] The box upper-end plane grinding mechanism is used to grind the welds at the connecting parts of the adjacent two sides of the upper-end plane of the sheet metal box. It mainly includes a third base, a left third conveying unit, a right third conveying unit, a third conveying width adjustment mechanism, a second fixing device for the sheet metal box, two groups of second-station grinding manipulators 6.1, and a flexible constant-force force control grinding mechanism 6.2. Among them, the combination of the third base, the left third conveying unit, the right third conveying unit, the third conveying width adjustment mechanism, and the second fixing device for the sheet metal box is used to realize the conveying and fixing of the box in the second grinding operation section.

[0049] The third base, the left third conveying unit, the right third conveying unit, the third conveying width adjusting mechanism, and the second fixing device of the sheet metal box respectively adopt the same structural form as the second base, the left second conveying unit, the right second conveying unit, the second conveying width adjusting mechanism, and the first fixing device of the sheet metal box. The installation position of the second fixing device of the sheet metal box in the left third conveying unit and the right third conveying unit refers to the installation position of the first fixing device of the sheet metal box in the left second conveying unit and the right second conveying unit. Above the conveyor belt of the left third belt conveying mechanism and above the conveyor belt of the right third belt conveying mechanism along the conveying direction, a left third baffle and a right third baffle are respectively arranged. Both the left third baffle and the right third baffle adopt a three-section structure arranged front and back. The setting form of the three-section structure refers to the same functional structure in the bottom corner and side corner grinding mechanism, and will not be elaborated here.

[0050] Two sets of second-station grinding manipulators are respectively arranged outside the left and right sides of the third base. An interface connected to the outer shell of the flexible constant-force force control grinding mechanism is arranged at the output end of the two sets of second-station grinding manipulators to realize the installation of the flexible constant-force force control grinding mechanism. For the specific structural form of the flexible constant-force force control grinding mechanism in this patent application, please refer to the technical solution disclosed in the prior patent application "Application No.: 202320473478.0, Name: A Square Flexible Constant-Force Force Control Grinding Mechanism". It will not be elaborated here.

[0051] Blank discharging table:

[0052] The blank discharging table is used to temporarily support the sheet metal box after grinding treatment. In the present invention, the blank discharging table is composed of a table body and support rollers sequentially arranged along the front-back direction at the upper end of the table body. The support rollers are rotatably supported at the upper end of the table body in a freely rotatable manner. After the sheet metal box is conveyed to the blank discharging table, the sheet metal box is taken off manually or by other equipment.

[0053] Detection unit:

[0054] In the above structure, a first sensor 3.9 is installed outside the upper part of the first conveying unit on one side of the loading conveying mechanism near the front end; a second sensor 5.4 is installed outside the rear section of the second baffle on one side of the bottom corner and side corner grinding mechanism near the front end; a third sensor is embedded in the rear side of at least one front stop block of the first fixing device of the sheet metal box; a fourth sensor is installed outside the rear section of the third baffle of the upper plane grinding mechanism of the box body near the front end; a fifth sensor is embedded in the rear side of at least one front stop block of the second fixing device of the sheet metal box.

[0055] In addition, to facilitate the replacement of the swing-type grinding actuator of the bottom corner and side corner grinding mechanisms, grinding actuator spare part platforms 4 are provided on both the left and right sides of the bottom corner and side corner grinding mechanisms. At least one set of spare swing-type grinding actuators is stored on the spare part platforms to enable the grinding manipulator of the bottom corner and side corner grinding mechanisms to automatically replace the swing-type grinding actuators. Sensors are provided on the grinding actuator spare part platforms to detect whether there are swing-type grinding actuators on the corresponding spare part platforms.

[0056] In addition, to facilitate the replacement of the grinding wheels of the upper plane grinding mechanism of the box body, a set of tool holders 7 are provided on each of the left and right sides outside the upper plane grinding mechanism of the box body. Multiple spare grinding wheels (the grinding wheels are fixed on the tool shafts) are placed on both sets of tool holders to enable the grinding manipulator of the upper plane grinding mechanism of the box body to automatically replace the grinding tools. Sensors are installed at each position where the grinding wheels can be stored to detect whether there are spare grinding wheels.

[0057] In addition, this sheet metal box grinding production line further includes a control system, which is placed in the electric control box 2 to control the entire grinding operation process.

[0058] The principle of this sheet metal box grinding production line is as follows:

[0059] The sheet metal box placed on the loading table is conveyed forward to the rear entrance of the loading conveying mechanism manually and automatically, and is conveyed forward under the action of the conveyor belts on both sides of the first conveying unit on the left and the first conveying unit on the right. When the sheet metal box is detected by the first sensor, the second conveying mechanism on the left and the second conveying mechanism on the right of the bottom corner and side corner grinding mechanism move to the upper working position to receive the sheet metal box output from the loading conveying mechanism. When the sheet metal box is conveyed forward and detected by the second sensor, the front stoppers on both sides of the bottom corner and side corner grinding mechanism move to the upper working position; when the sheet metal box is conveyed to the position directly above the first fixing device for the sheet metal box and detected by the third sensor, the middle baffles of the second baffle on the left and the middle baffles of the second baffle on the right of the bottom corner and side corner grinding mechanism move inward towards each other to clamp the left and right sides of the sheet metal box, and are limited by the two front stoppers of the bottom corner and side corner grinding mechanism; then the middle baffles of the second baffle on the left and the middle baffles of the second baffle on the right of the bottom corner and side corner grinding mechanism move outward in the opposite direction to release the clamping of the sheet metal box. At the same time, the second conveying mechanism on the left and the second conveying mechanism on the right of the bottom corner and side corner grinding mechanism move downward to the lower working position, so that the sheet metal box falls onto the upper end of the first fixing device for the sheet metal box below to achieve adsorption and fixation; when the sheet metal box is adsorbed and fixed, the front stoppers on both sides of the bottom corner and side corner grinding mechanism move to the lower working position; the first station grinding manipulators on both sides drive the rocker arm type grinding actuator to grind the welding positions of the two side corners and the bottom corner on the corresponding side of the sheet metal box according to the control program set by the production line control system; when the grinding of the first station is completed, the second conveying mechanism on the left and the second conveying mechanism on the right of the bottom corner and side corner grinding mechanism move to the upper working position again, and at the same time, the electromagnetic strips on the first fixing device for the sheet metal box are powered off, and the sheet metal box is conveyed forward to the upper plane grinding mechanism of the box body. When the sheet metal box is conveyed forward and detected by the fourth sensor; the front stoppers on both sides of the upper plane grinding mechanism of the box body move to the upper working position. When the sheet metal box is conveyed to the position directly above the second fixing device for the sheet metal box and detected by the fifth sensor, the middle baffles of the third baffle on the left and the middle baffles of the third baffle on the right of the upper plane grinding mechanism of the box body move inward towards each other to clamp the left and right sides of the sheet metal box, and are limited by the two front stoppers of the upper plane grinding mechanism of the box body; then the middle baffles of the third baffle on the left and the middle baffles of the third baffle on the right of the upper plane grinding mechanism of the box body move outward in the opposite direction to release the clamping of the sheet metal box. At the same time, the third conveying mechanism on the left and the third conveying mechanism on the right of the upper plane grinding mechanism of the box body move downward to the lower working position, so that the sheet metal box falls onto the upper end of the second fixing device for the sheet metal box below to achieve adsorption and fixation; when the sheet metal box is adsorbed and fixed, the front stoppers on both sides of the upper plane grinding mechanism of the box body move to the lower working position;The second-station grinding manipulators on both sides drive the flexible constant-force force control grinding mechanism to grind the weld joints at the connecting parts of the adjacent two sides of the upper plane of the corresponding side of the sheet metal box according to the control program set by the production line control system; when the grinding of the second station is completed, the left third conveyor belt mechanism and the right third conveyor belt mechanism of the upper plane grinding mechanism of the box body move to the upper working position again, and at the same time, the electromagnetic strips on the second fixing device of the sheet metal box are powered off, and the sheet metal box is conveyed forward to the blanking table to complete the entire grinding process.

[0060] Embodiment:

[0061] Apply this sheet metal box grinding production line to the grinding of a sheet metal box with dimensions of 1200×800×300. One sheet metal box can be processed within 2 minutes. In the existing manual grinding method, it takes at least 4 minutes for a single person to complete the grinding of a sheet metal box of the same size and the grinding quality is also difficult to guarantee. Compared with the existing manual grinding method, the grinding efficiency and grinding quality can be greatly improved.

[0062] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art can understand that various substitutions, changes, and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the content disclosed in the embodiments and drawings.

Claims

1. A sheet metal box grinding production line, characterized by: It includes a loading platform, a loading conveying mechanism, a box bottom corner and side corner grinding mechanism, a box upper end plane grinding mechanism, a loading platform and a control system; along the conveying direction of the sheet metal box, the loading platform, the loading conveying mechanism, the box bottom corner and side corner grinding mechanism, the box upper end plane grinding mechanism and the loading platform are connected and arranged in sequence; The loading platform is used to temporarily support the sheet metal box before polishing, and its support height is consistent with the conveying height of the loading conveying mechanism; The feeding conveying mechanism adopts a belt conveying mechanism with adjustable conveying width, which is used to automatically convey the sheet metal box to the entrance end of the box bottom corner and side corner grinding mechanism; The bottom corner and side corner grinding mechanism is used to realize the grinding processing of the two bottom corners and four vertical corner welds on the left and right sides of the sheet metal box; the bottom corner and side corner grinding mechanism includes a belt conveyor mechanism with adjustable conveying width and controllable conveying height, a first fixing device for the sheet metal box, two groups of first-station grinding manipulators and a swing head type grinding actuator; the first fixing device for the sheet metal box is arranged between the belt conveyors on the left and right sides of the bottom corner and side corner grinding mechanism, and the sheet metal box is fixed at the first station by magnetic force; the two groups of first-station grinding manipulators are respectively arranged outside the left and right sides of the belt conveyor mechanism of the bottom corner and side corner grinding mechanism, and the output ends of the two groups of first-station grinding manipulators are respectively connected to the outer shell of a swing arm head type grinding actuator; The upper plane grinding mechanism of the box body is used to realize the grinding of the welds at the connecting parts of the two adjacent sides of the upper plane of the box body; the upper plane grinding mechanism of the box body includes a belt conveyor mechanism with adjustable conveying width and controllable conveying height, a second fixing device for the sheet metal box, two groups of second-station grinding manipulators, and a flexible constant-force force-controlled grinding mechanism; the second fixing device for the sheet metal box is arranged between the belt conveyor mechanisms on the left and right sides of the upper plane grinding mechanism of the box body, and the sheet metal box is fixed at the second station by magnetic force; the two groups of second-station grinding manipulators are respectively arranged on the left and right sides of the belt conveyor mechanism of the upper plane grinding mechanism of the box body, and the output ends of the two groups of second-station grinding manipulators are respectively connected to the outer shell of a flexible constant-force force-controlled grinding mechanism; The unloading table is used to temporarily support the sheet metal box after grinding.

2. The sheet metal box grinding production line according to claim 1 is characterized in that: The loading and conveying mechanism includes a first base, a left first conveying unit, a right first conveying unit, and a first conveying width adjustment mechanism; the front lower end of the left first conveying unit and the front lower end of the right first conveying unit are connected to the first base through a group of linear guide pairs located at the front; the rear lower end of the left first conveying unit and the rear lower end of the right first conveying unit are connected to the first base through a group of linear guide pairs located at the rear; the upper part of the left first conveying unit is provided with a left first belt conveying mechanism, and a left first baffle is provided in the upper end gap of the left first belt conveying mechanism; the upper part of the right first conveying unit is provided with a right first belt conveying mechanism, and a right first baffle is provided in the upper end gap of the right first belt conveying mechanism; the first conveying width adjustment mechanism adopts a screw nut mechanism driven by a servo motor, and the screw adopts a bidirectional screw with reverse threads at both ends, and two nut members cooperating with the screw are respectively fixed to the lower end of the vertical plate of the left first conveying unit and the lower end of the vertical plate of the right first conveying unit.

3. The sheet metal box grinding production line according to claim 1 is characterized in that: The bottom corner and side corner grinding mechanism includes a second base, a left second conveying unit, a right second conveying unit, a second conveying width adjustment mechanism, the first fixing device of the sheet metal box, two groups of the first station grinding robots, and the swing head type grinding actuator; the connection method of the left second conveying unit, the right second conveying unit and the second base is the same as the connection method of the left first conveying unit, the right first conveying unit and the first base, and the second conveying width adjustment mechanism is the same as the first conveying width adjustment mechanism; a left second belt conveying mechanism is arranged on the upper part of the left second conveying unit, and the lower end of the frame of the left second belt conveying mechanism is connected to the lower frame part of the left second conveying unit through a vertically arranged lifting drive cylinder to realize the lifting and lowering control of the left second belt conveying mechanism; a right second belt conveying mechanism is arranged on the upper end of the right second conveying unit; the lower end of the frame of the right second belt conveying mechanism is connected to the lower frame part of the right second conveying unit through a vertically arranged lifting drive cylinder to realize the lifting and lowering control of the right second belt conveying mechanism.

4. The sheet metal box grinding production line according to claim 3 is characterized in that: A left second baffle and a right second baffle are respectively arranged above the conveyor belt of the left second belt conveyor mechanism and above the conveyor belt of the right second belt conveyor mechanism along the belt conveying direction, and the left second baffle and the right second baffle both adopt a three-section structure arranged front and back, wherein the middle section of the left second baffle and the middle section of the right second baffle are respectively arranged at the outer positions of the left and right sides directly opposite to the first fixing device of the sheet metal box, and both adopt movable baffles movable in the left and right directions, which are controlled by their respective baffle driving mechanisms; the front baffle and the rear baffle of the left second baffle and the right second baffle are both supported by fixed brackets.

5. The sheet metal box grinding production line according to claim 3 is characterized in that: The first fixing device of the sheet metal box is composed of supporting frames arranged on the left and right sides and two parallel electromagnetic strips fixed to the upper ends of the supporting frames on both sides. The lower ends of the two supporting frames are fixedly connected to the upper end of the second base; the distance between the two supporting frames is smaller than the length of the sheet metal box; a front stopper that can be raised and lowered is embedded in the upper ends of the supporting frames on the left and right sides, in front of the electromagnetic strips.

6. The sheet metal box grinding production line according to claim 4, characterized in that: The plane grinding mechanism at the upper end of the box body includes a third base, a third conveying unit on the left, a third conveying unit on the right, a third conveying width adjustment mechanism, the second fixing device of the sheet metal box, two groups of the second station grinding robots, and the flexible constant force control grinding mechanism; the third base, the third conveying unit on the left, the third conveying unit on the right, the third conveying width adjustment mechanism, and the second fixing device of the sheet metal box respectively adopt the same structural form as the second base, the second conveying unit on the left, the second conveying unit on the right, the second conveying width adjustment mechanism, and the first fixing device of the sheet metal box; a third baffle on the left and a third baffle on the right are respectively arranged above the conveyor belt of the third belt conveying mechanism on the left and above the conveyor belt of the third belt conveying mechanism on the right along the belt conveying direction; the third baffle on the left and the third baffle on the right adopt the same structural form as the second baffle on the left and the second baffle on the right.

7. The sheet metal box grinding production line according to claim 4, characterized in that: A first sensor is installed on the outer side of the upper part of the first conveying unit on one side of the feeding conveying mechanism, close to the front end; a second sensor is installed on the outer side of the rear section of the second baffle on one side of the bottom corner and side corner grinding mechanism, close to the front end; a third sensor is embedded on the rear side of the front block of at least one side of the first fixing device of the sheet metal box; a fourth sensor is installed on the outer side of the rear section of the third baffle of the upper end plane grinding mechanism of the box body, close to the front end; a fifth sensor is embedded on the rear side of the front block of at least one side of the second fixing device of the sheet metal box.

8. The sheet metal box grinding production line according to claim 1, characterized in that: A grinding actuator spare parts table is arranged outside the left and right sides of the bottom corner and side corner grinding mechanisms, and at least one set of spare swing-type grinding actuators is stored on the grinding actuator spare parts tables on both sides.

9. The sheet metal box grinding production line according to claim 1, characterized in that: A set of tool holders are respectively arranged outside the left and right sides of the plane grinding mechanism at the upper end of the box body, and a plurality of spare grinding wheels are placed on the two sets of tool holders.

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