CN212497052U - Novel grinding and polishing numerical control floating system of grinding and polishing machine - Google Patents
Novel grinding and polishing numerical control floating system of grinding and polishing machine Download PDFInfo
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- CN212497052U CN212497052U CN202021339637.0U CN202021339637U CN212497052U CN 212497052 U CN212497052 U CN 212497052U CN 202021339637 U CN202021339637 U CN 202021339637U CN 212497052 U CN212497052 U CN 212497052U
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Abstract
The utility model discloses a novel grinding and polishing numerical control floating system of grinding and polishing machine, include: the grinding and polishing device comprises a floating support plate and a rack, wherein a grinding driving wheel and a grinding and polishing contact wheel are mounted on one side of the floating support plate, a contact wheel supporting arm is fixedly mounted on the floating support plate, and the grinding driving wheel is connected with a grinding wheel driving motor; and a tension and compression sensor and an actuating mechanism are arranged on the other side of the floating support plate on the rack, one end of the tension and compression sensor is connected with the floating support plate, and the other end of the tension and compression sensor is connected with the actuating mechanism. The utility model discloses a high response, high accuracy draw pressure sensor, reach the high accuracy measurement drive contact wheel fast and by the pressure between the material of polishing, through the controller, realize the self-adaptation position closed loop control of grinding contact wheel position, and then reached the grinding polishing effect of high quality, high stability.
Description
Technical Field
The utility model relates to a grinding and polishing processing technology field specifically is a novel grinding and polishing numerical control floating system of grinding and polishing machine.
Background
At present, in the grinding and polishing industry, the market and labor force structure have changed greatly. For example, the grinding and polishing of blades of steam turbines, heavy-duty gas turbines and aeroengines, as well as complex parts such as wind power non-metallic blades, human body implanted bones and the like are all manually completed two decades ago. Along with the development of the technology of each industry, the grinding and polishing industry is greatly changed, and along with the high-speed development of computer technology, robot technology and the like, the complexity of automatic grinding of parts which can be ground gradually in the industry is gradually improved. There is also a factor that labor costs are increasing. The demands of the automatic grinding technology and the grinding market, which are changing day by day, also become the largest driving force for the development of the industry.
In the grinding and polishing industry, whether a grinding contact wheel is a grinding belt, a cloth wheel or a hard grinding wheel, the contact wheel is optimally contacted with the surface of a workpiece at a constant pressure, and the grinding contact wheel also has the factors of different linear speeds, almost constant grinding intensity of an abrasive material and the like, wherein the constant grinding pressure at each time point becomes a difficult problem in the industry worldwide.
The following methods are mainly used for constant pressure in grinding at present:
(1) the air source is connected to the air cylinder after passing through the pressure regulating valve (or the electromagnetic proportional valve). And the floating function of the contact wheel during grinding is realized under the condition that a certain pressure is set by the pressure regulating valve. The mode has the advantages of simple structure, low price, lower technical threshold and higher market share. However, this approach also has the following disadvantages: firstly, because the speed of the workpiece close to the contact wheel is different due to the requirements of different processes, and the speed of the workpiece arranged on the grinding track behind the contact wheel is different, the workpiece is close to the contact wheel at a certain speed, after the contact wheel is stressed, the sliding frame overcomes the pressure of the cylinder, the friction resistance between the inner wall of the cylinder and the piston, and the inertia of the sliding frame begins to retract backwards, the workpiece contacts the contact wheel, and before the sliding frame begins to retract, the pressure of the contact surface area of the ground workpiece by the contact wheel in the period of time is far about the set normal floating pressure, and the over-grinding is often formed on the surface of the workpiece. When the sliding frame retracts passively under the pressure of a workpiece, due to the inertia of the sliding frame, the retracting speed of the sliding frame is different from the running speed of the workpiece from the contact to the initial point of the grinding track, so that the workpiece moves from the initial point of the grinding track to the initial stage of the grinding track, the contact wheel on the sliding frame does not return to the normal contact position with the workpiece, and the phenomenon of less grinding occurs at the moment, thus, the corrugation of over-grinding and less grinding is left at the initial part of the grinding track of the workpiece, and the phenomenon is more obvious when some applications such as larger mass of a driving motor and larger mass of the sliding frame are applied, and the repeated oscillation of the contact wheel brings great difficulty for the program debugging of automatic grinding; secondly, along with the long-time application of the grinding machine, the friction resistance between the piston of the floating cylinder on the grinding machine and the cylinder wall is larger and larger, so that the initial resistance of the sliding frame in floating is larger and larger, and the floating hysteresis is more and more obvious; thirdly, the floating force error of the floating of the cylinder is large. And fourthly, floating the pressure and performing open loop control on the floating structure.
(2) The spring is used as a floating execution device, most of applications realize floating by the tension of the spring, and realize the difference of floating force by adjusting the difference of the tension under different lengths of the spring. The mode has the advantages of quick floating and simple structure, and has the disadvantages that: the adjustment of the pressure cannot be measured and visualized, and the mass inertia of the grinding wheel, the driving motor and the related rigidly connected structure, the open-loop control of the floating pressure and the actuating mechanism and the like cannot be overcome.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel grinding and polishing numerical control floating system of grinding and polishing machine to solve the invariable of the floating force of grinder contact wheel and the inertia problem that floats of the grinding mechanism of contact wheel, and unsteady faster, more accurate corresponding, shorten response cycle.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a novel grinding and polishing numerical control floating system of grinding and polishing machine, includes: the device comprises a floating support plate and a rack, wherein a horizontal support plate guide rail is fixedly arranged on the rack, and the floating support plate is arranged on the support plate guide rail in a sliding manner;
a grinding driving wheel and a grinding and polishing contact wheel are mounted on one side of the floating support plate, an abrasive belt is wound between the grinding driving wheel and the grinding and polishing contact wheel, the grinding and polishing contact wheel is rotatably mounted on a contact wheel support arm, the contact wheel support arm is fixedly mounted on the floating support plate, and the grinding driving wheel is connected with a grinding wheel driving motor; the other side of the floating support plate on the rack is provided with a tension and compression sensor and an actuating mechanism, one end of the tension and compression sensor is connected with the floating support plate, the other end of the tension and compression sensor is connected with the actuating mechanism, and the actuating mechanism is used for driving the floating support plate to slide.
As a further aspect of the present invention: the actuating mechanism comprises a sliding block rack and a servo motor, the servo motor is installed on the rack, a gear is arranged at the output shaft end of the servo motor and meshed with the sliding block rack, and the sliding block rack is arranged on the rack in a sliding mode.
As a further aspect of the present invention: one end of the tension and compression sensor is connected with the floating support plate through a connecting piece.
As a further aspect of the present invention: the utility model discloses still include control system, control system includes changer and controller, the changer respectively with draw pressure sensor and controller to be connected.
As a further aspect of the present invention: the transmitter adopts a sensor with 4-20mA current output.
As a further aspect of the present invention: the front surface of the floating support plate is also provided with an abrasive belt deflection adjusting wheel mechanism which is a roller wheel arranged on the floating support plate and adjustable in longitudinal height.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the oscillation grinding impact of over-grinding and less-grinding is reduced to the maximum extent in the grinding, polishing and grinding stage;
because the contact force is also transmitted to the sensor while the workpiece contacts the grinding contact wheel, the actuating motor drives the actuating mechanism to quickly respond, the advancing or retreating speed of the actuating mechanism depends on the force applied to the grinding contact wheel by the workpiece, the advancing or retreating instant speed of the contact wheel is higher when the force is higher, the speed is adjusted according to the instant contact force in real time, and the impact of repeated oscillation of the contact wheel is reduced to the maximum extent.
2. The floating force precision is greatly improved;
the high-response and high-precision pull-press sensor has the advantages that the high-resolution and high-response resolution can be transmitted to the controller in a high-resolution and high-response mode for the slight change of the contact force transmitted by the contact wheel, and the high-precision and high-response speed of the floating force of the contact wheel on a workpiece is realized in a closed-loop control mode.
3. The numerical value of the floating force can be set in real time and at any time in an automatic grinding and polishing program;
in the automatic execution process of the grinding program, the data of the floating force can be set and changed at any time point and any number of times according to the requirements of the process, and the data can be reflected in real time.
4. The actuator providing the floating force has no actuation frictional resistance;
any change in the contact force of the contact wheel with the workpiece is ultimately performed by a number of pulses from the motor and actuator structure, without the workpiece exerting additional more pressure on the contact wheel to allow the contact wheel to retract.
Drawings
Fig. 1 is a schematic front structural view of the present invention.
Fig. 2 is a schematic view of the back structure of the present invention.
Fig. 3 is a schematic diagram of the control system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, in an embodiment of the present invention, a novel grinding and polishing numerical control floating system of a grinding and polishing machine includes: the floating support plate comprises a floating support plate 1 and a frame 7, wherein a horizontal support plate guide rail 71 is fixedly arranged on the frame 7, and the floating support plate 1 is arranged on the support plate guide rail 71 in a sliding manner;
the front surface of the floating support plate 1 is provided with a grinding driving wheel 2, an abrasive belt deflection adjusting wheel mechanism 3 and a grinding and polishing contact wheel 5, an abrasive belt is wound between the grinding driving wheel 2 and the abrasive belt deflection adjusting wheel mechanism 3 and the grinding and polishing contact wheel 5, and the abrasive belt deflection adjusting wheel mechanism 3 is a roller wheel which is arranged on the floating support plate 1 and is adjustable in longitudinal height and used for adjusting the tensity of the abrasive belt; the grinding and polishing contact wheel 5 is rotatably arranged on the contact wheel supporting arm 4, and the contact wheel supporting arm 4 is fixedly arranged on the floating supporting plate 1;
the back that lies in floating support plate 1 in frame 7 is provided with draws pressure sensor 8, slider rack 9, servo motor 10 and grinding wheel driving motor 11, servo motor 10 installs in frame 7, and servo motor 10 output shaft end sets up the gear, the gear meshes with slider rack 9, slider rack 9 slides and sets up in frame 7, draw pressure sensor 8's one end to pass through connecting piece 6 and be connected with floating support plate 1, the other end is connected with slider rack 9, grinding wheel driving motor 11 installs in floating support plate 1's back, and its output shaft is connected with grinding drive wheel 2.
As shown in FIG. 3, when the grinding and polishing workpiece contacts the grinding and polishing contact wheel 5, a pressure is formed on the grinding wheel, and the pressure is transmitted to the tension and compression sensor 6 through the connecting piece 6 between the floating support plate 1 and the tension and compression sensor 8, and is sensedThe pressure between the device and the processed workpiece is indirectly measured by the device. The analog signal from the tension and compression sensor 8 is converted by the transducer and transmitted to the controller, and finally the motor control signal is output through signal modulation, linear processing and amplification, and PID processing. The signal realizes the back-and-forth movement through a servo motor 10 and a sliding block rack 9 configured by a user, so that the pressure between the contact wheel and the processed workpiece is fixed in a pressure value set by a floating system, the pressure does not change along with the surface profile shape of the workpiece and the posture of the workpiece in the grinding and polishing process, the position of the contact wheel is controlled through a closed loop of the pressure, the position response period of the extremely short pressure change and the measurement of a high-precision pressure value are realized, and further, the grinding and polishing processing effects with high quality and high stability are achieved. For example, the follow-up pressure control set in the controller is 1.5kg/cm2And the pressure between the contact wheel and the ground workpiece detected by the sensor is more than 1.5kg/cm2When the pressure reaches 1.5kg/cm, the controller drives the feed motor driving unit to reduce the distance between the servo motor and the surface of the polished material through the contact wheel until the pressure reaches 1.5kg/cm2(ii) a On the contrary, if the pressure between the grinding motor and the workpiece to be ground and not to be polished is detected to be less than 1.5kg/cm2When the pressure reaches 1.5kg/cm, the controller drives the servo motor driving unit to increase the distance between the contact wheel and the surface of the workpiece to be ground and polished until the pressure reaches 1.5kg/cm2。
The transmitter adopts a sensor with 4-20mA current output. The conventional transmitting sensor outputs a signal of 0-5VDC or 0-10VDC, which causes the following problems: first, since the transmitted signal is a voltage signal, the transmission line may be interfered by noise; second, the distributed resistance of the transmission line causes a voltage drop. At least the transmission distance from the grinding motor (namely the position of the transmitter) to the controller of the electric cabinet is 5-10m, and the transmission line and a power line and a feedback line of the alternating current servo motor penetrate through the tank chain together and finally enter the electric cabinet. The power line of the alternating current servo motor is a three-phase sine wave of hundreds of volts, and the follow-up signal is necessarily interfered as long as the motor works; if a conventional 0-5VDC (or 0-10 VDC) voltage output is used, the signal output by the transmitter is affected even if a shield of very high quality is selected for transmission. Because the current is not sensitive to noise, 4mA of the current of 4-20mA is used for representing a zero signal, 20mA is used for representing the full scale of the signal, and the signal which is lower than 4mA and higher than 20mA is used for alarming various faults, so that the influence of relevant noise is avoided and the problems are solved by using the current for transmitting the signal.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a novel grinding and polishing numerical control floating system of grinding and polishing machine, includes: the floating support plate comprises a floating support plate (1) and a rack (7), wherein a horizontal support plate guide rail (71) is fixedly arranged on the rack (7), and the floating support plate (1) is arranged on the support plate guide rail (71) in a sliding manner;
the method is characterized in that: a grinding driving wheel (2) and a grinding and polishing contact wheel (5) are mounted on one side of the floating support plate (1), an abrasive belt is wound between the grinding driving wheel (2) and the grinding and polishing contact wheel (5), the grinding and polishing contact wheel (5) is rotatably mounted on a contact wheel support arm (4), the contact wheel support arm (4) is fixedly mounted on the floating support plate (1), and the grinding driving wheel (2) is connected with a grinding wheel driving motor (11); the other side that lies in floating support plate (1) on frame (7) is provided with and draws pressure sensor (8) and actuating mechanism, draw the one end of pressing sensor (8) and be connected with floating support plate (1), the other end is connected with actuating mechanism, actuating mechanism is used for driving floating support plate (1) and slides.
2. The novel grinding and polishing numerical control floating system of the grinding and polishing machine according to claim 1, characterized in that: the actuating mechanism comprises a sliding block rack (9) and a servo motor (10), the servo motor (10) is installed on the rack (7), a gear is arranged at the output shaft end of the servo motor (10), the gear is meshed with the sliding block rack (9), and the sliding block rack (9) is arranged on the rack (7) in a sliding mode.
3. The novel grinding and polishing numerical control floating system of the grinding and polishing machine according to claim 1, characterized in that: one end of the tension and compression sensor (8) is connected with the floating support plate (1) through a connecting piece (6).
4. The novel grinding and polishing numerical control floating system of the grinding and polishing machine according to claim 1, characterized in that: still include control system, control system includes changer and controller, the changer respectively with draw pressure sensor (8) and controller connection.
5. The novel grinding and polishing numerical control floating system of the grinding and polishing machine as claimed in claim 4, characterized in that: the transmitter adopts a sensor with 4-20mA current output.
6. The novel grinding and polishing numerical control floating system of the grinding and polishing machine according to claim 1, characterized in that: the front surface of the floating support plate (1) is also provided with an abrasive belt deflection adjusting wheel mechanism (3), and the abrasive belt deflection adjusting wheel mechanism (3) is a roller which is arranged on the floating support plate (1) and can adjust the longitudinal height.
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| CN202021339637.0U CN212497052U (en) | 2020-07-09 | 2020-07-09 | Novel grinding and polishing numerical control floating system of grinding and polishing machine |
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| CN202021339637.0U CN212497052U (en) | 2020-07-09 | 2020-07-09 | Novel grinding and polishing numerical control floating system of grinding and polishing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118931A (en) * | 2021-05-25 | 2021-07-16 | 安徽鑫艺达抛光机械股份有限公司 | Inner ring welding seam polishing machine |
| CN113427368A (en) * | 2021-07-16 | 2021-09-24 | 吉林大学 | Intelligent grinding and polishing system with automatically replaced tool for complex curved surface robot and control method |
-
2020
- 2020-07-09 CN CN202021339637.0U patent/CN212497052U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118931A (en) * | 2021-05-25 | 2021-07-16 | 安徽鑫艺达抛光机械股份有限公司 | Inner ring welding seam polishing machine |
| CN113427368A (en) * | 2021-07-16 | 2021-09-24 | 吉林大学 | Intelligent grinding and polishing system with automatically replaced tool for complex curved surface robot and control method |
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