Constant pressure device suitable for automatic polishing equipment
Technical Field
The invention relates to the field of automatic mechanical equipment, in particular to a constant pressure device suitable for automatic polishing equipment.
Background
The deburring of semi-finished work pieces is a common process flow in industry and can be classified into, for example, casting work pieces, laser cutting work pieces, welding work pieces, etc., depending on the use and process. The common aluminum profile connecting corner connector is a typical die-casting workpiece, and due to the limitation of a die-casting process, a large number of burrs exist at corners of the workpiece after die-casting, potential safety hazards such as attractive appearance and sharp cutting hands exist, and the practical use effect of the workpiece cannot be achieved. In the production process of workpieces like angle yards, polishing treatment is required to be carried out on semi-finished workpieces, and the polishing requires accurate positions and constant pressure.
In the prior art, workpiece polishing is often performed manually. On one hand, the labor intensity of workers is high; on the other hand, the polishing efficiency is low by means of personal experience of workers, and the phenomena of uneven polishing degree, local excessive polishing and the like occur.
Disclosure of Invention
The invention aims to provide a constant pressure device suitable for automatic polishing equipment, which is used for polishing under constant pressure by means of automatic equipment, can manually set a pressure value, maintain constant pressure, and reduce the instant impact force on mechanical parts, stepping motors and force sensors generated when large weld marks or hard particles are encountered during polishing, and has the advantages of good constant pressure effect, high degree of automation and accurate control.
The invention comprises a constant pressure control device, a pressure transmission device and a polishing device.
The constant pressure control device comprises a constant pressure control area sleeve, a ball screw motor, a motor mounting pad and a tension pressure sensor, wherein the constant pressure control area sleeve is a main shell of the constant pressure control device, and the shell comprises a cross section with a center penetrating and surrounding multiple holes. The square hole in the center of the cross section accommodates a ball screw motor, and the porous position is used as a mounting position of the tension pressure sensor. The pulling pressure is transmitted to the motor mounting pad, and the motor mounting pad transmits the pulling pressure to the pulling pressure sensor, and the forward and reverse rotation of the ball screw motor is adjusted through communication feedback with the upper computer.
The lower part of the constant pressure control device is connected with a pressure transmission device through a pressure transmission area sleeve, and the pressure transmission device comprises a ball nut connected with the ball screw motor, a spring connecting block driven by the ball nut, an upper spring mounting disc connected with the spring connecting block, a spring and a lower spring mounting disc.
The lower part of the pressure transmission device is connected with a polishing device through a polisher flange, and the polishing device comprises a brushless motor connected with a lower end cover of a polishing area and a polishing piece part connected with the brushless motor.
Further, the device further comprises a mounting flange, wherein the mounting flange is used as a bearing main body and is connected with the mechanical arm, the mounting flange is positioned on the upper portion of the constant pressure control device, the mounting flange is fixedly connected with the constant pressure control area sleeve, and the connecting joint is internally provided with an O-shaped sealing ring I and is in sealing connection.
Further, a manual knob is arranged outside the constant pressure control area sleeve and is used as an adjusting knob for manually setting a desired pressure value.
Further, the pressure transmission area sleeve is internally nested with the eight-edge antifriction bushing and is used for eliminating torsional moment, the eight-edge antifriction bushing is internally nested with the eight-edge inner sliding sleeve, and the eight-edge inner sliding sleeve and the spring driving area can jointly move up and down relative to the eight-edge antifriction bushing.
Further, the outermost layer of the pressure transmission device comprises an organ dust cover, and the upper section and the lower section are respectively connected with the constant pressure control device and the polishing device.
Further, the polishing piece part comprises a polisher coupling flange, a rubber pad, a polishing piece and a pressure plate.
Further, the sander flange is connected with a sanding area sealing cover, and an O-shaped sealing ring II is clamped in the sanding area sealing cover.
In summary, the invention has the following beneficial effects:
1. the mounting flange moves in all directions through the mechanical arm, so that polishing at different positions is performed.
2. Manually setting a desired pressure value under the control of a manual knob; or communicate with the upper computer, receive the pressure value that the upper computer presumes and polish.
3. And the instantaneous impact force on mechanical parts, stepping motors and force sensors generated when large weld marks or hard particles are encountered during polishing is relieved.
4. The force transmission precision is high, and the eight-edge inner sliding cylinder moves up and down relative to the eight-edge antifriction sleeve, so that the torsion moment of the polishing device is eliminated.
5. The tension and compression sensor is dynamically fed back to the upper computer in real time, the upper computer drives the ball screw motor dynamically, and the constant pressure is stable.
6. The dustproof effect is good, and the sealing gasket ensures that grinding fine dust during polishing does not enter the sealing cover shell, so that the operation of the motor is prevented from being damaged.
Drawings
FIG. 1 is an external construction diagram of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a block diagram of the constant pressure control device;
FIG. 4 is a block diagram of a pressure transfer device;
FIG. 5 is a diagram of an upper spring mounted disc construction;
FIG. 6 is a diagram of a lower spring mounted disc construction;
fig. 7 is a block diagram of a polishing apparatus.
In the figure: A. constant pressure control device, pressure transmission device, grinding device, constant pressure control area sleeve, mounting flange, ball screw motor, motor mounting pad, pull pressure sensor, manual knob, 16. O-ring I, 2 octagon inner slide, 21, upper spring mounting plate, 22, lower spring mounting plate, 23 octagon antifriction bushing, 24, ball screw nuts, 25, spring connecting blocks, 26, springs, 27, a lower end cover of a pressure transmission area, 28, an organ dust cover, 29, a sleeve of the pressure transmission area, 3, a seal cover of a polishing area, 31, a flange of a polishing device, 32, a lower end cover of the polishing area, 33, a brushless motor, 34, a coupling flange of the polishing device, 35, a rubber pad, 36, a pressure plate, 37, polishing sheets and 38, O-shaped sealing rings.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
The utility model provides a constant voltage device suitable for automatic equipment of polishing, contains the mounting flange, fixedly connected with constant voltage control device on the mounting flange, constant voltage control device sliding connection pressure transmission device, pressure transmission device sliding connection is in the grinding device that contact was polished.
The mounting flange is fixedly connected with the constant pressure control area sleeve, and the connecting joint is internally provided with an O-shaped sealing ring I which is in sealing connection.
The constant pressure control device comprises a manual knob connected with the constant pressure control area sleeve, a tension pressure sensor connected with the constant pressure control area sleeve, a motor mounting pad connected with the tension pressure sensor, and a ball screw motor connected with the motor mounting pad.
The pressure transmission device comprises a ball nut connected with the ball screw motor, a spring connecting block driven by the ball nut, an upper spring mounting disc connected with the spring connecting block, a spring and a lower spring mounting disc.
The outermost layer of the pressure transmission device comprises an organ dust cover, and the upper section and the lower section are respectively connected with the constant pressure control device and the polishing device.
The polishing device comprises a polisher flange connected with the pressure transmission device and a polishing area sealing cover connected with the polisher flange, wherein an O-shaped sealing ring II is clamped in the polishing area sealing cover.
The polishing device comprises a brushless motor connected with a lower end cover of a polishing area and a polishing piece part connected with the brushless motor, wherein the polishing piece part comprises a coupling flange of a polishing device, a rubber pad, a polishing piece and a pressure plate.
Examples: as shown in fig. 1 and 2, the polishing device comprises a constant pressure control device a, a pressure transmission device B and a polishing device C. The upper end cover part of the constant pressure control device A (figure 3) is provided with a mounting flange 11, and is connected with the mechanical arm as a bearing main body, and the material is not limited. The constant pressure control area sleeve 1 is a main shell of the constant pressure control device, and the shell comprises a cross section with a center penetrating and a periphery porous. The central square hole accommodates the body of the ball screw motor 12, and the porous position serves as the installation position of the tension pressure sensor 14. The pulling pressure is transmitted to the motor mounting pad 13 through the ball screw motor 12, the motor mounting pad 13 transmits the pulling pressure to the pulling pressure sensor 14, and the forward and reverse rotation of the ball screw motor 12 is adjusted through communication feedback with an upper computer. The outside of the constant pressure control area sleeve 1 contains a manual knob 15 as an adjusting knob for manually setting the desired pressure value.
As shown in fig. 4, a pressure transmission device B is connected to the lower side of the constant pressure control device a through a pressure transmission area sleeve 29, and an eight-edge antifriction bushing 23 is nested inside the pressure transmission area sleeve 29. The eight-edge antifriction bushing 23 can eliminate torsional moment, is made of polytetrafluoroethylene, and is improved in smoothness, and a pressure transmission area lower end cover 27 is arranged below the eight-edge antifriction bushing 23. The eight-edge antifriction bushing 23 is internally nested with the eight-edge inner slide cylinder 2, the ball screw nut 24, the spring connecting block 25, the upper spring mounting disc 21, the spring 26 and the lower spring mounting disc 22 are respectively arranged in the eight-edge inner slide cylinder 2 from top to bottom, and the function of the spring 26 is damping, so that the instantaneous impact force on mechanical parts, stepping motors and force sensors generated when large weld marks or hard spots are encountered during polishing is slowed down; secondly, to provide a time buffer for the stepper motor to raise or lower the ball screw nut 24. The upper spring mounting plate 21 and the lower spring mounting plate 22 are specially notched to facilitate spring installation (fig. 5 and 6). The eight-edge inner sliding cylinder and the spring driving area can jointly move up and down relative to the eight-edge antifriction bushing, the outermost layer of the pressure transmission device comprises an organ dust cover 28, and the upper section and the lower section are respectively connected with the constant pressure control device and the polishing device.
As shown in fig. 7, a sanding device C is connected below the pressure transmission device B by a sander flange 31. The polishing area sealing cover 3 is made of metal and provides heat dissipation for the brushless motor 33 connected with the lower end cover 32 of the polishing area. The rotating shaft of the brushless motor 33 is connected with a grinder coupling flange 34, a clamping rubber pad 35, a grinding sheet 37 and a pressure plate 36.
In the present case, the critical joints are embedded with O-seals 16, 38 to prevent grinding fines during grinding from entering the sealed housing and damaging the motor.
In summary, components such as robotic arms drive the entire sanding apparatus through the mounting flange 11 to move through any angle and direction in space. The polishing pressure is set manually or automatically by a machine, and the contact between the polishing sheet 37 rotating at high speed and the workpiece to be polished transmits the force to the octagon inner slide 2, and the force is transmitted to the tension pressure sensor 14 after being filtered by the spring 26. The pull pressure sensor 14 is communicated with an upper computer to feed back and adjust the forward and reverse rotation of the ball screw motor 12 to adjust the pull pressure. The spring 26 has the function of damping, and can reduce the instant impact force on mechanical parts, stepping motors and force sensors when large weld marks or hard mass points are encountered during polishing; secondly, to provide a time buffer for the stepper motor to raise or lower the ball screw nut 24. Under the limitation of the angle and displacement precision of the mechanical arm, constant-pressure polishing can be realized. The whole process is controlled by a numerical control system, the stroke is accurate, the reaction is rapid, and the automation degree is high.