CN116430793A - Control method and control system of servo press-fitting equipment - Google Patents

Control method and control system of servo press-fitting equipment Download PDF

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Publication number
CN116430793A
CN116430793A CN202310467577.2A CN202310467577A CN116430793A CN 116430793 A CN116430793 A CN 116430793A CN 202310467577 A CN202310467577 A CN 202310467577A CN 116430793 A CN116430793 A CN 116430793A
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China
Prior art keywords
module
servo
press
control system
operation rate
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CN202310467577.2A
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Inventor
梅全彬
沈梦云
徐云腾
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Suzhou Tengfei Precision Technology Co ltd
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Suzhou Tengfei Precision Technology Co ltd
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Priority to CN202310467577.2A priority Critical patent/CN116430793A/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/054—Input/output
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/11—Plc I-O input output
    • G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Presses (AREA)

Abstract

The invention discloses a control method of servo press-fitting equipment, which comprises the following steps: step one, a first operation rate, a second operation rate, a third operation rate, a first speed change position, a second speed change position, a target position and a preset pressing load of a servo pressing module are preset in a control system; step two, the servo press-in module operates to a first speed change position at a first operation rate under the control of the control system; step three, the servo press-in module operates to a second speed change position at a second operation rate under the control of the control system; step three, the servo pressing-in module presses the product to a target position at a third running speed under the control of the control system; and step four, the servo pressing-in module returns to the standby position at a first running speed under the control of the control system. According to the invention, the press-in module is controlled by the control system to finish press-in of the product at three different speeds, so that the stability of the press-in load is ensured and the press-in quality is ensured while the press-in efficiency is not affected.

Description

Control method and control system of servo press-fitting equipment
Technical Field
The invention relates to the technical field of industrial equipment control, in particular to a control method and a control system of servo press-fitting equipment.
Background
With the development of the times and the continuous improvement of the industrial production level, the processing technology of products designed and manufactured by various industrial production enterprises is increasingly complex, and the assembly and processing requirements on various parts in the products are also increasingly strict.
In the processing process of products, the press fitting of parts is an important process, and is also an important condition for ensuring the qualification rate of the products, and the press fitting generally refers to an assembly process for assembling two parts in interference fit to a specified position in a hole by applying pressure. Press fitting is widely used in mechanical assembly processes, particularly in interference fit assembly processes. For example, the mounting process of parts such as bowl-shaped plugs for plugging, engine valve guides, engine valve seats, gearbox bearings and the like of the engine cylinder cover adopts a press-fitting process.
Generally, a processing enterprise can purchase corresponding press-fitting equipment to execute part press-fitting operation according to product requirements of different clients so as to meet specific requirements of assembly of parts in products. The press-fitting operation is usually performed by using a hydraulic cylinder or a servo cylinder, and the press-fitting process is usually as follows: 1) Loading a workpiece to be pressed into a pressing machine and clamping the workpiece; 2) The press-fitting part is in place; 3) The press-fitting part presses the shaft part into a designated position, and the press-fitting part resets; 4) And (5) clamping and loosening, and discharging.
In the operation process, the press-fitting depth of the shaft part press-fitting hole part needs to be accurately controlled so as to ensure the quality of the whole part. At present, whether the servo press-fitting equipment presses products into place is judged by operators according to experience, so that the press-fitting quality of each product is uneven, and the press-fitting quality is difficult to guarantee.
Disclosure of Invention
In order to solve at least one technical problem in the prior art, the invention provides a control method and a control system of servo press-fitting equipment.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: a control method of servo press-fitting equipment comprises the following steps:
step one, a first operation rate, a second operation rate, a third operation rate, a first speed change position, a second speed change position, a target position and a preset pressing load of a servo pressing module are preset in a control system;
step two, the servo press-in module operates to a first speed change position at a first operation rate under the control of the control system;
step three, the servo press-in module operates to a second speed change position at a second operation rate under the control of the control system;
step three, the servo pressing-in module presses the product to a target position at a third running speed under the control of the control system;
and step four, the servo pressing-in module returns to the standby position at a first running speed under the control of the control system.
In some embodiments, the first variable speed position is a position of the lowest end of the servo press-in module from 1 to 2 millimeters from the top of the product;
the second shift position is a position at which the lowermost end of the product is 5 to 6 mm from the target position where the product is pressed in.
In some embodiments, the first operating rate is a fixed value, the first operating rate=0.6v max ～V max Wherein V is max And the high-speed operation rate of the servo press-in module is set.
In some embodiments, the second operating rate is a fixed value and the first operating rate = 0.1V max ～0.3V max Wherein V is max And the high-speed operation rate of the servo press-in module is set.
In some embodiments, the third operating rate is a variable value, the third operating rate becomes smaller as the current load increases, the third operating rate = { (preset indentation load-current load)/preset indentation load } Vx, vx = 0.05V max ～0.1V max Wherein V is max And the high-speed operation rate of the servo press-in module is set.
In some embodiments, the current load is a load of the product reacting to the servo press-in module, the current load is obtained in real time through a load sensor, and the load sensor is arranged at the lower end of the servo press-in module and is connected with the control system.
In some embodiments, the predetermined pressing load is a load of the product against the servo pressing module when the product is pressed into the target position.
In certain embodiments, the control system is a PLC.
In some embodiments, the servo press-in module is disposed above the product, and the servo press-in module includes a servo motor connected to the control system, a transmission assembly driven by the servo motor, and a press-in component disposed at an end of the transmission assembly.
A control system of a servo press-fitting device, wherein the control system controls the servo press-fitting device to press a product into a target position by applying the control method; the control system comprises a control system electrically connected with a servo press-in module of the servo press-in equipment, and a load sensor, a load instrument and a human-computer interface which are electrically connected with the control system, wherein the load sensor is fixed on the servo press-in module and is used for monitoring the load of a product reacting on the servo press-in module in real time.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the press-in module is controlled by the control system to finish press-in of the product at three different speeds, so that the press-in efficiency is not influenced, the stability of the press-in load is ensured, the press-in quality is ensured, the problem of uneven quality level caused by manual misjudgment is avoided, and meanwhile, the labor is liberated.
Drawings
Fig. 1 is a schematic structural diagram of a control system of a servo press-fitting apparatus according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and detailed description thereof, which are simplified schematic drawings which illustrate only the basic structure of the invention and therefore show only those features which are relevant to the invention, it being noted that embodiments and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways that are different than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
The disclosure provides a control method of a servo press-fitting device, comprising the following steps:
step one, a first operation rate, a second operation rate, a third operation rate, a first speed change position, a second speed change position, a target position and a preset pressing load of a servo pressing module are preset in a control system;
step two, the servo press-in module operates to a first speed change position at a first operation rate under the control of the control system;
step three, the servo press-in module operates to a second speed change position at a second operation rate under the control of the control system;
step three, the servo pressing-in module presses the product to a target position at a third running speed under the control of the control system;
and step four, the servo pressing-in module returns to the standby position at a first running speed under the control of the control system.
In some embodiments, the first speed change position is a speed change position in which the servo press-in module is converted from a first operation speed to a second operation speed, and after the servo press-in module is operated from the standby position to the first speed change position at the first operation speed under the control of the control system, the servo press-in module is decelerated to the second operation speed under the control of the control system, and the servo press-in module continues to move downwards at the second operation speed. The first speed change position is a position where the lowest end of the servo press-in module is about to contact the product, and the position can be set at a position 1 to 2 mm away from the top of the product.
The second speed changing position is a speed changing position for converting the second operation speed of the servo pressing-in module into the third operation speed, after the servo pressing-in module is operated from the first speed changing position to the second speed changing position under the control of the control system at the second operation speed, the servo pressing-in module is decelerated to the third operation speed under the control of the control system, and the servo pressing-in module continuously moves downwards at the third operation speed until the product is pressed into the target position. The second changing position is a position where the product is to be pressed into the target position, and the second speed changing position is a position where the lowest end of the product is 5 to 6 mm away from the target position where the product is pressed into.
In some embodiments, the first operation rate is a high-speed operation rate of the servo press-in module in the press-in process, and the servo press-in module is close to the product at the high-speed operation rate, so that the press-in process can be shortened, and the press-in efficiency can be improved. The first operation rate is a fixed value, the servo press-in module moves from the standby position to the first speed changing position at a constant speed at the first operation rate, and the first operation rate=0.6v max ～V max Wherein V is max Is a high-speed operation rate of the servo press-in module.
In some embodiments, the second operation rate is a medium-speed operation rate of the servo press-in module in the press-in process, the servo press-in module presses the product at the medium-speed operation rate and presses the product to a position 5 to 6 millimeters away from the target position, the press-in efficiency is not influenced, the stability of the press-in load is ensured, and the deviation of the press-in position of the product caused by the excessively fast press-in rate is avoided, so that the press-in quality of the product is influenced. The first operation speed is a fixed value, the servo press-in module moves from the first speed changing position to the second speed changing position at a constant speed at a second operation speed, and the second operation speed is=0.1V max ～0.3V max Wherein V is max Is a high-speed operation rate of the servo press-in module.
And the second operation rate is a fixed value, and the servo pressing-in module is used for pressing the first operation rate into the second operation rate.
In some embodiments, the third operating rate is a low-speed operating rate of the servo push module, and the third operating rate is a variable value, the value of the third operating rate decreasing as the product month gradually approaches the target location. The servo pressing-in module presses the product into the target position from the position which is about to be close to the target position at a continuously reduced low-speed running speed, so that the phenomenon that the servo pressing-in module continuously presses the product due to untimely speed reduction after the product is pressed in place, and excessive pressing or damage of the product is caused can be avoided. Third transportLine rate = { (preset indentation load-current load)/preset indentation load } Vx, vx=0.05v max ～0.1V max Wherein V is max Is a high-speed operation rate of the servo press-in module.
The preset pressing load is the load of the product reacting on the servo pressing module when the product is pressed into the target position, the load can be the maximum load or the average load of the products of the same model or series reacting on the servo pressing module when the products are pressed into the target position, and the maximum load and the average load can be obtained through multiple tests.
The current load is the real-time load of the product reacting to the servo pressing-in module, and the current load is obtained in real time through a load sensor. The load sensor is arranged at the lower end of the servo pressing-in module and connected with the control system, and the load value detected by the load sensor is displayed in a load instrument connected with the control system.
For example, assuming that the maximum operation rate of the servo press-in module is 300mm/s, vx is 20mm/s, the preset press-in load of the product is 10KN, the third operation rate is 20mm/s when the current load detected by the load sensor is 0KN, and the third operation rate is 0mm/s when the current load detected by the load sensor is 10 KN.
When the third operation rate is reduced to 0, the product is considered to be pressed into the target position, and the servo pressure module is reversely accelerated under the control of the control system and returns to the standby position at the third operation rate.
Of course, the press-fit end position of the servo press-in module can also be preset in the control system, and when the servo press-in module operates to the press-fit end position at the third operation rate, the product is determined to be pressed into the target position. The press-fitting end position of the servo press-in module can be obtained through multiple tests.
In certain embodiments, the control system is a PLC.
In some embodiments, a servo press-in module is disposed above the product, the servo press-in module including a servo motor connected to the PLC, a transmission assembly driven by the servo motor, and a press-in member disposed at a distal end of the transmission assembly.
Referring to fig. 1, the present disclosure further provides a control system of a servo press-fitting device, where the control system controls the servo press-fitting device to press a product into a target position by applying the control method described above, and the control system includes a control system electrically connected to a servo press-fitting module of the servo press-fitting device, and a load sensor, a load meter, and a human-machine interface electrically connected to the control system, where the load sensor is fixed to the servo press-fitting module and is used for detecting a load of the product against the servo press-fitting module, and the load meter is used for displaying the load detected by the load sensor and a load change curve of the load with time; the first operation speed, the second operation speed, the third operation speed, the first speed change position, the second speed change position, the target position and the preset pressed load are pre-stored in the control system in advance through a human-computer interface.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application can be understood by those skilled in the art in the specific context.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments described above will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The control method of the servo press-fitting equipment is characterized by comprising the following steps of:
step one, a first operation rate, a second operation rate, a third operation rate, a first speed change position, a second speed change position, a target position and a preset pressing load of a servo pressing module are preset in a control system;
step two, the servo press-in module operates to a first speed change position at a first operation rate under the control of the control system;
step three, the servo press-in module operates to a second speed change position at a second operation rate under the control of the control system;
step three, the servo pressing-in module presses the product to a target position at a third running speed under the control of the control system;
and step four, the servo pressing-in module returns to the standby position at a first running speed under the control of the control system.
2. The method for controlling a servo press-fitting apparatus according to claim 1, wherein,
the first speed change position is a position, which is 1 to 2 millimeters away from the top of the product, of the lowest end of the servo press-in module;
the second shift position is a position at which the lowermost end of the product is 5 to 6 mm from the target position where the product is pressed in.
3. The method for controlling a servo press-fitting apparatus according to claim 1, wherein,
the first operation rate is a fixed value, and the first operation rate=0.6v max ～V max Wherein V is max And the high-speed operation rate of the servo press-in module is set.
4. The method for controlling a servo press-fitting apparatus according to claim 1, wherein,
the second operation rate is a fixed value, and the first operation rate=0.1v max ～0.3V max Wherein V is max And the high-speed operation rate of the servo press-in module is set.
5. The method for controlling a servo press-fitting apparatus according to claim 1, wherein,
the third operation rate is a variable value, the third operation rate becomes smaller with the increase of the current load, and the third operation rate = { (preset indentation load-current load)/preset indentation load } Vx, vx = 0.05V max ～0.1V max Wherein V is max And the high-speed operation rate of the servo press-in module is set.
6. The method for controlling a servo press-fitting apparatus according to claim 5, wherein,
the current load is the load of the product reacting on the servo pressing-in module, the current load is obtained in real time through a load sensor, and the load sensor is arranged at the lower end of the servo pressing-in module and is connected with the control system.
7. A control method of a servo press-fitting apparatus according to any one of claims 1 to 6, wherein,
the preset pressing load is the load of the product reacting to the servo pressing module when the product is pressed into the target position.
8. A control method of a servo press-fitting apparatus according to any one of claims 1 to 6, wherein,
the control system is a PLC.
9. A control method of a servo press-fitting apparatus according to any one of claims 1 to 6, wherein,
the servo pressing-in module is arranged above a product and comprises a servo motor connected with the control system, a transmission assembly driven by the servo motor and a pressing-in part arranged at the tail end of the transmission assembly.
10. A control system of servo press-fitting equipment is characterized in that,
the control system controls the servo press-fitting device to press the product into the target position by applying the control method according to any one of claims 1 to 9;
the control system comprises a control system electrically connected with a servo press-in module of the servo press-in equipment, and a load sensor, a load instrument and a human-computer interface which are electrically connected with the control system, wherein the load sensor is fixed on the servo press-in module and is used for monitoring the load of a product reacting on the servo press-in module in real time.
CN202310467577.2A 2023-04-27 2023-04-27 Control method and control system of servo press-fitting equipment Pending CN116430793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310467577.2A CN116430793A (en) 2023-04-27 2023-04-27 Control method and control system of servo press-fitting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310467577.2A CN116430793A (en) 2023-04-27 2023-04-27 Control method and control system of servo press-fitting equipment

Publications (1)

Publication Number Publication Date
CN116430793A true CN116430793A (en) 2023-07-14

Family

ID=87083234

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310467577.2A Pending CN116430793A (en) 2023-04-27 2023-04-27 Control method and control system of servo press-fitting equipment

Country Status (1)

Country Link
CN (1) CN116430793A (en)

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