WO2018120865A1

WO2018120865A1 - Specialized a-grade door frame surface polisher

Info

Publication number: WO2018120865A1
Application number: PCT/CN2017/098950
Authority: WO
Inventors: 吴建
Original assignee: 广州蓝圣智能科技有限公司
Priority date: 2016-12-30
Filing date: 2017-08-25
Publication date: 2018-07-05
Also published as: CN106736960A

Abstract

A specialized A-grade door frame surface polisher, comprising a base (1). The base (1) is provided with a door frame positioning jig (2), a robot (3), and a control box (11). The robot (3) and the control box (11) are positioned next to the door frame positioning jig (3). A rotating base (10) is installed on a rotating shaft at a terminal of the robot (3). The rotating base (10) is installed with a servomotor (5), a pneumatic grinding machine (8), and a pneumatic polishing machine (9). An output terminal of the servomotor (5) is directly or indirectly installed with an electric-powered angle grinding machine (7). An upper surface or a side surface of the control box (11) is provided with a grinding wheel wear sensor (4) for measuring the degree of wear of an angle grinding wheel. An action of the output terminal of the servomotor (5) is controlled by a feedback signal sent by the grinding wheel wear sensor (4). After the angle grinding wheel completes a task, the wheel contacts the grinding wheel wear sensor at a uniform pressure. The grinding wheel wear sensor then feeds back data to the control box. The control box controls a feed amount of the output terminal of the servomotor, performing real-time monitoring of the amount of grinding performed by the angle grinding wheel, and compensating by use of the servomotor. The invention can achieve precision of up to 0.03 mm.

Description

Door frame A-level surface grinding machine

Technical field

The invention relates to a door frame grinding production line in the research field of automobile spare parts production, in particular to a door frame A-level surface grinding special machine in a door frame grinding production line.

Background technique

The door frame is generally subjected to a welding process, and the weld is required to be polished after the welding process. However, in the prior art, the weld is generally coarsely ground by a hand-held angle grinder, and then subjected to a grinding and polishing process by a grinding machine and a polishing machine, respectively, so that the grinding precision of the surface of the door frame reaches the A-level surface. Manual grinding has the following shortcomings, the workload is large, the degree of automation is low, and the quality after grinding is unstable. Automated grinding, automatic grinding, polishing and polishing of the welds on the door frames are also carried out using automated sanding equipment. However, the existing automatic grinding equipment has the following disadvantages: after the wear of the angle grinding wheel on the angle grinder, the angle grinder still operates according to the set trajectory, resulting in an unstable grinding amount per grinding and residual after rough grinding. The amount of sanding is inconsistent, affecting the subsequent finishing and polishing processes. In addition, due to the wear of the angle grinding wheel, the pressure of the angle grinding wheel on the weld on the door frame changes, resulting in a change in the grinding pressure during the grinding process, which ultimately affects the quality of the grinding.

Summary of the invention

The object of the present invention is to provide a door frame A-level surface grinding special machine, which can realize complex polishing path to improve product surface roughness, reduce manual work, realize automatic production, reduce production cost, reduce working time and improve production efficiency.

The solution to solve the technical problem of the present invention is: a door frame A-level surface grinding special machine, comprising a base, the base frame is arranged with a door frame positioning jig, a robot and a control box, wherein the robot and the control box are located in the door frame Next to the positioning fixture, a rotating seat is mounted on the rotating shaft at the end of the robot, and a servo motor, a pneumatic grinding machine and a pneumatic polishing machine are mounted on the rotating base, and the output end of the servo motor is directly or indirectly mounted with an electric angle grinder. The upper end surface or the side end surface of the control box is provided with a grinding wheel wear sensor for detecting the wear amount of the angle grinding wheel, and the output end of the servo motor is controlled by a signal fed back by the grinding wheel wear sensor.

As a further improvement of the above technical solution, the working plane of the electric angle grinder is perpendicular to the working plane of the pneumatic grinder, and the working plane of the electric angle grinder is perpendicular to the working plane of the pneumatic polishing machine, and the pneumatic polishing machine is The working plane is perpendicular to the working plane of the pneumatic sander.

As a further improvement of the above technical solution, the rotation axis of the working plane of the pneumatic sander is parallel to the rotation axis of the robot end.

As a further improvement of the above technical solution, an electric cylinder is disposed on both sides of the servo motor, and an output end of the servo motor is connected to an electric cylinder through a lead screw, and an output end of the electric cylinder passes through a connecting seat and an electric angle Mill connection.

As a further improvement of the above technical solution, a pressure sensor is installed at a connection end of the output end of the electric cylinder and the connecting seat, and a pressure at an output end of the electric cylinder is fed back to the control box through a pressure sensor, and the control box controls the electric power. The pressure at the end of the cylinder output.

As a further improvement of the above technical solution, the grinding wheel wear sensor comprises a sensor main body installed inside the control box and a pressure contact rod passing through a top wall or a side wall of the control box, the end of the pressure contact rod being vertically upward or pointing Robot.

As a further improvement of the above technical solution, the pressure contact rod is sleeved with a return spring, one end of the return spring is pressed against the inner wall of the control box, and the other end of the return spring is pressed against the boss of the pressure contact rod.

The invention has the beneficial effects that the invention has a grinding wheel wear sensor for detecting the wear amount of the angle grinding wheel on the upper end surface or the side end surface of the control box, and the angle grinding wheel touches the grinding wheel wear sensor after each work. The grinding wheel wear sensor feeds back the value to the control box. The control box controls the feed amount at the output end of the servo motor, so that the grinding amount of the angle grinding wheel is monitored in real time and compensated by the servo motor with an accuracy of up to 0.03 mm. In addition, the pressure sensor is passed. Real-time feedback and closed loop with the servo motor for precise control. The grinding force of the angle grinding wheel is precisely controlled within 0.5N. The invention realizes the complicated polishing path to improve the surface roughness of the product; reduces the manual operation, realizes the automatic production, reduces the production cost, reduces the working time, and improves the production efficiency.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is apparent that the described drawings are only a part of the embodiments of the present invention, and not all of the embodiments, and those skilled in the art can obtain other designs and drawings according to the drawings without any creative work.

Figure 1 is a schematic view of the structure of the present invention;

Figure 2 is a partial enlarged view of the portion selected by the circle A in Figure 1;

Figure 3 is a partial enlarged view of a portion of the circle B of Figure 1.

detailed description

The concept, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The scope of protection of the present invention. In addition, all the coupling/joining relationships mentioned in the text are not directly connected to the components, but rather may constitute a better coupling structure by adding or reducing the coupling accessories according to the specific implementation.

Referring to FIGS. 1 to 3, a door frame A-level surface grinding machine includes a base 1 on which a door frame positioning jig 2, a robot 3, and a control box 11 are disposed, the robot 3 and a control box 11 is located beside the door frame positioning fixture 2, and a rotating base 10 is mounted on the rotating shaft of the robot 3 end. The rotating base 10 is mounted with a servo motor 5, a pneumatic grinding machine 8 and a pneumatic polishing machine 9, the servo motor 5 The output end is directly or indirectly mounted with an electric angle grinder 7 , and an upper end surface or a side end surface of the control box 11 is provided with a grinding wheel wear sensor 4 for detecting the wear amount of the angle grinding wheel, and the output end of the servo motor 5 is operated. Controlled by the feedback of the wheel wear sensor 4. The working plane of the electric angle grinder 7 is perpendicular to the working plane of the pneumatic grinder 8, the working plane of the electric angle grinder 7 is perpendicular to the working plane of the pneumatic polishing machine 9, the working plane of the pneumatic polishing machine 9 and The working plane of the pneumatic sander 8 is vertical. The axis of rotation of the working plane of the pneumatic sander 8 is parallel to the axis of rotation of the robot 3 end. An electric cylinder 6 is disposed on both sides of the servo motor 5, and an output end of the servo motor 5 is connected to the electric cylinder 6 through a lead screw, and an output end of the electric cylinder 6 passes through the connecting base and the electric angle grinder 7 connection. A pressure sensor is mounted at the connection end of the output end of the electric cylinder 6 and the connection seat, and the pressure at the output end of the electric cylinder 6 is fed back to the control box 11 through a pressure sensor, and the control box 11 controls the output end of the electric cylinder 6 The pressure at the end. The wheel wear sensor 4 includes a sensor main body mounted inside the control box 11 and a pressure contact rod 40 passing through a top wall or a side wall of the control box 11, the end of the pressure contact rod 40 being vertically upward or pointing to the robot 3 . The pressure contact rod 40 is sleeved with a return spring, one end of the return spring is pressed against the inner wall of the control box 11, and the other end of the return spring is pressed against the boss of the pressure contact rod 40. In the non-operating state, the return spring causes the pressure lever to be in a natural state. After the angle grinding wheel is pressed against the pressure lever, the return spring returns to the natural state.

A grinding wheel wear sensor 4 for detecting the wear amount of the angle grinding wheel is arranged on the upper end surface or the side end surface of the control box 11, and after each operation of the angle grinding wheel, the grinding wheel wear sensor 4 is pressed, and the grinding wheel wear sensor 4 will numerically Feedback to the control box 11, the control box 11 controls the feed amount of the output end of the servo motor 5, so that the grinding amount of the angle grinding wheel is monitored in real time, and is compensated by the servo motor 5, and the electric angle grinder 7 is polished every time to ensure the welding after the grinding The height of the mark is 0.1-0.5mm, preferably, the precision is up to 0.03mm. In addition, the pressure sensor performs real-time feedback and forms a closed loop with the servo motor 5 to achieve precise control. The grinding force of the angle grinding wheel is precisely controlled at 0.5N. Within. The invention realizes the complicated polishing path to improve the surface roughness of the product; reduces the manual operation, realizes the automatic production, reduces the production cost, reduces the working time, and improves the production efficiency.

After the rough grinding is completed by the electric angle grinder 7, the rotating shaft of the robot 3 is rotated 90° clockwise, so that the working surface of the pneumatic sander 8 is opposite to the required grinding position on the door frame, and the machine is controlled by the control box 11. The person 3 carries out the fine grinding of the door frame with a pneumatic grinding machine 8 to process the remaining grinding amount. After the finish grinding, the rotating shaft of the robot 3 is rotated 90° clockwise, so that the working surface of the pneumatic polishing machine 9 is opposite to the required polishing position on the door frame, and the robot 3 is controlled by the control box 11 with a pneumatic The polishing machine 9 polishes the door frame to achieve high-quality surface finish quality.

The above is a detailed description of the preferred embodiments of the present invention, but the invention is not limited to the embodiments, and various modifications and substitutions can be made by those skilled in the art without departing from the spirit of the invention. Such equivalent modifications or alternatives are intended to be included within the scope of the claims.

Claims

The door frame A-level surface grinding special machine is characterized in that: the base comprises a base, the door frame positioning fixture, the robot and the control box are arranged on the base, the robot and the control box are located beside the door frame positioning fixture, the robot A rotating base is mounted on the rotating shaft of the end, and a servo motor, a pneumatic grinding machine and a pneumatic polishing machine are mounted on the rotating base, and an output angle of the servo motor is directly or indirectly mounted with an electric angle grinder, and the control box is A grinding wheel wear sensor for detecting the amount of wear of the angle grinding wheel is disposed on the upper end surface or the side end surface, and the output end of the servo motor is controlled by a signal fed back by the grinding wheel wear sensor.
The door frame A-level surface grinding machine according to claim 1, wherein the working plane of the electric angle grinder is perpendicular to the working plane of the pneumatic grinder, and the working plane of the electric angle grinder and the pneumatic polishing machine The working plane is vertical, and the working plane of the pneumatic polishing machine is perpendicular to the working plane of the pneumatic sander.
The door frame A-level surface grinding machine according to claim 2, wherein the rotation axis of the working plane of the pneumatic sander is parallel to the rotation axis of the robot end.
The door frame A-level surface grinding machine according to any one of claims 1 to 3, characterized in that: the electric motor is arranged on both sides of the servo motor, and the output end of the servo motor is connected to the electric cylinder through a screw The output end of the electric cylinder is connected to the electric angle grinder through a connecting seat.
The door frame A-level surface grinding machine according to claim 4, wherein a pressure sensor is installed at a connection end of the output end of the electric cylinder and the connection seat, and the pressure at the output end of the electric cylinder is fed back through the pressure sensor. To the control box, the control box controls the pressure at the end of the output of the electric cylinder.
The door frame A-level surface grinding machine according to any one of claims 1 to 3, wherein the grinding wheel wear sensor comprises a sensor main part installed inside the control box and a pressure passing through a top wall or a side wall of the control box. The lever, the end of the pressure lever is vertically upward or directed toward the robot.
The door frame A-level surface grinding machine according to claim 6, wherein the pressure contact rod is sleeved with a return spring, one end of the return spring is pressed against the inner wall of the control box, and the other end of the return spring is pressed. On the boss of the pressure lever.