CN116352624A - Electric clamp for cylindrical workpiece and control method thereof - Google Patents

Abstract

The invention provides an electric clamp for a cylindrical workpiece and a control method thereof, wherein the electric clamp comprises a clamp base, a workpiece supporting plate, a vibration sensor, a servo motor, a coupler, a sliding block, a connecting plate, a clamping plate, a screw rod, a polished rod and a fixed bracket; two sides of the clamp base are provided with a left fixing bracket and a right fixing bracket; the workpiece supporting plate is horizontally fixed on the left fixing bracket; the vibration sensor is arranged on the bottom surface of the workpiece supporting plate; the servo motor is installed with the right fixed bracket through a screw; the right end of the screw rod is connected with an output shaft of the servo motor through a coupler; guide polish rods are arranged on the left side and the right side of the screw rod in parallel; the sliding block is connected with the screw rod and the polish rod in a matching way; the connecting plate is fixed with the upper surface of the sliding block, and the clamping plate is arranged at an angle of 45 degrees with the connecting plate. The electric clamp for the cylindrical workpiece is driven by the servo motor to clamp and fix, so that the clamping speed is high, the clamping force is controllable, the applicable workpiece size range is wide, the manpower is saved, and the economic benefit of processing and production is improved.

Description

Electric clamp for cylindrical workpiece and control method thereof

Technical Field

The invention belongs to the technical field of electric clamping devices, and particularly relates to an electric clamp for a cylindrical workpiece and a control method thereof.

Background

The clamp is one of indispensable auxiliary equipment in the machining industry, and plays a role in clamping and fixing a workpiece, however, the traditional clamp is manually clamped and loosened, so that time and labor are wasted, the working efficiency is low, the clamping force of the clamp is manually clamped and is not easy to control, the clamping degree is different each time, and the workpiece is easily damaged; the pneumatic clamp has the advantages of simple control part and low cost, but has unstable movement and insufficient driving rigidity; although the hydraulic clamp is stable in transmission and high in driving rigidity, oil leakage is easy to occur, pollution is large, and the hydraulic clamp is easily influenced by environmental temperature.

Therefore, a new electric clamp for cylindrical workpieces and a control method thereof are needed to solve the problems of low working efficiency, uncontrollable clamping force and unstable operation of the clamp in the prior art.

Disclosure of Invention

The invention provides an electric clamp for a cylindrical workpiece and a control method thereof, which can solve the problems of low working efficiency, uncontrollable clamping force and unstable operation of the clamp in the prior art.

In order to solve the problems, the technical scheme provided by the invention is as follows:

the embodiment of the invention provides an electric clamp for cylindrical workpieces, which comprises a clamp base, a workpiece supporting plate, a vibration sensor, a servo motor, a coupler, a sliding block, a connecting plate, a clamping plate, a screw rod, two polished rods and a fixed bracket, wherein the clamping base is arranged on the clamp base;

the fixing support comprises a left fixing support and a right fixing support which are positioned on the two end surfaces of the clamp base, the workpiece supporting plate is horizontally fixed on the left fixing support, and the vibration sensor is arranged on the bottom surface of the workpiece supporting plate; the servo motor is mounted with the right side fixing bracket through a screw; the connecting plate is arranged on the surface of the sliding block, the clamping plate is arranged on the surface of the connecting plate, and the clamping plate and the sliding block are installed together at an angle of 45 degrees through the connecting plate;

one end of the screw rod is connected with an output shaft of the servo motor through the coupler; the two polished rods are arranged on two sides of the screw rod in parallel; the sliding block penetrates through the screw rod and the two polished rods, wherein a nut and two linear bearings are arranged on the sliding block, the sliding block is connected with the screw rod in a matched mode through the nut, and the sliding block is connected with the two polished rods in a matched mode through the two linear bearings.

According to an alternative embodiment of the invention, the end of the workpiece supporting plate is also provided with a rubber cushion block.

According to an alternative embodiment of the invention, the screw is a T-shaped screw.

According to an alternative embodiment of the invention, the left side fixing bracket comprises a left fixing bottom plate, a left vertical plate perpendicular to the left fixing bottom plate and a left rib plate attached to the left fixing bottom plate and the left vertical plate; and the number of the left rib plates is 2, and 2 left rib plates are positioned on two sides of the left vertical plate.

According to an alternative embodiment of the invention, the right side fixing bracket comprises a right fixing bottom plate, a right vertical plate perpendicular to the right fixing bottom plate and a right rib plate attached to the right fixing bottom plate and the right vertical plate; and the number of the right rib plates is 2,2 right rib plates are positioned on two sides of the right vertical plate, and the servo motor is positioned between 2 right rib plates.

According to an alternative embodiment of the invention, a sensor bracket is further arranged on the clamp base, and a photoelectric sensor is arranged in the sensor bracket.

According to an optional embodiment of the invention, a guide rail seat is further arranged on the clamp base, a left support plate and a right support plate are respectively arranged on two sides of the guide rail seat, and two ends of the screw rod are rotatably fixed on the left support plate and the right support plate.

According to an alternative embodiment of the present invention, one end of the left support plate is propped against the bottom of the workpiece support plate, so as to support the workpiece support plate.

According to an alternative embodiment of the invention, the vibration sensor is used for converting the received vibration signal into a measurable electric signal and feeding the measurable electric signal back to the control system; the photoelectric sensor is used for converting the rotation signal of the screw rod into a measurable electric signal and feeding the measurable electric signal back to the control system; the control system controls the rotating speed and the moment of the servo motor according to the received electric signals, wherein the servo motor has the functions of braking and Ethernet communication.

According to one of the above embodiments, the present invention further provides a control method of an electric clamp for a cylindrical workpiece, the control method including:

step S1, setting the starting position, clamping speed and clamping moment values of an electric clamp on a human-computer interface according to the size of a workpiece and the processing production requirement, clicking a zero return button after parameters are set, driving a clamping plate on the electric clamp by a servo motor to start zero return positioning, and rapidly moving the clamping plate to the starting position after zero position searching, so as to finish preparation work;

s2, when a workpiece is positioned on a workpiece supporting plate, a clamping button is clicked, a clamping plate on an electric clamp starts to clamp the workpiece at a set speed and moment, the clamping state is detected in real time through a vibration sensor, when the workpiece loosens in the machining process, the electric clamp can generate abnormal vibration, the vibration sensor feeds back the signal to a control system, and the control system compensates the clamping force;

and S3, after the workpiece is processed, clicking a release button, and rapidly returning a clamping plate on the electric clamp to a clamping starting position, so that the clamping plate reciprocates to rapidly clamp the workpiece.

Compared with the prior art, the invention has the beneficial effects that: the embodiment of the invention provides an electric clamp for cylindrical workpieces and a control method thereof, wherein a servo motor is used for driving the clamp to replace the traditional manual clamping and loosening of the workpieces, so that the defects of pneumatic and hydraulic driving are overcome, the stable and rapid clamping of the workpieces is realized, and the working efficiency is greatly improved. Because the servo motor is used for driving, a moment mode can be used during clamping, so that the accurate control of the clamping moment is realized, stable and adjustable clamping force is provided, and the damage to a workpiece is avoided. For cylindrical workpieces with different diameters, the distance between the clamping plate and the workpiece supporting plate can be adjusted by setting the starting position of the clamp through parameters, so that the device can be applicable to workpieces with different sizes.

Drawings

In order to more clearly illustrate the embodiments or the technical solutions in the prior art, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front view of an electric clamp for a cylindrical workpiece according to an embodiment of the present application.

Fig. 2 is a schematic top view of an electric clamp for a cylindrical workpiece according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a slider in an electric clamp for a cylindrical workpiece according to an embodiment of the present application.

Fig. 4 is an electromechanical working principle diagram of an electric clamp for a cylindrical workpiece according to an embodiment of the present application.

In the figure: clamp base 1, left fixed bottom plate 2, left riser 3, left gusset 4, work piece layer board 5, rubber cushion 6, vibration sensor 7, right fixed bottom plate 8, right riser 9, right gusset 10, servo motor 11, shaft coupling 12, right backup pad 13, guide rail seat 14, left backup pad 15, slider 16, connecting plate 17, clamping plate 18, photoelectric sensor 19, sensor support 20, lead screw 21, polished rod 22, linear bearing 23, nut 24.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the terms "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. In the present application, "/" means "or" in the meaning. In the drawings, like elements are denoted by the same reference numerals, and broken lines in the drawings indicate that they are not present in the structure, and only the shape and position of the structure are described. The present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed.

As shown in fig. 1 to 3, the embodiment of the present application provides an electric clamp for cylindrical workpieces, which includes a clamp base 1, a workpiece pallet 5, a vibration sensor 7, a servo motor 11, a coupling 12, a slider 16, a connection plate 17, a clamping plate 18, a screw 21, two polish rods 22, and a fixing bracket.

Left and right fixing brackets are arranged on two sides of the clamp base 1, and each left/right fixing bracket consists of a bottom plate, a vertical plate and a rib plate and provides stable support. The fixing brackets in the embodiment comprise a left fixing bracket and a right fixing bracket which are positioned on the two end surfaces of the clamp base 1, the workpiece supporting plate 5 is horizontally fixed on the left fixing bracket, and the vibration sensor 7 is arranged on the bottom surface of the workpiece supporting plate 5; the vibration sensor 7 can convert the received vibration signal into a measurable electric signal and feed the measurable electric signal back to the control system; the control system controls the rotation speed and torque of the servo motor 11 according to the fed-back electric signals.

The servo motor 11 is installed with the right fixed bracket through screws; the connecting plate 17 is arranged on the surface of the sliding block 16, the clamping plate 18 is arranged on the surface of the connecting plate 17, and the clamping plate 18 is installed together with the horizontal sliding block at an angle of 45 degrees through the connecting plate 17.

Referring to fig. 1 and 2 in combination with fig. 3, one end of a screw 21 is connected with an output shaft of a servo motor 11 through a coupling 12; two polish rods 22 are arranged on two sides of the screw rod 21 in parallel; the slider 16 passes through the screw rod 21 and the polished rod 22 horizontally, wherein, be provided with nut 24 and two linear bearings 23 on the slider 16, the slider passes through nut 24 and screw rod 21 cooperation is connected, and the slider 16 passes through two linear bearings 23 and two polished rods 22 cooperation is connected to this realization: the electric clamp clamps the fixed workpiece through the servo motor drive, the clamping speed is high, the clamping force is controllable, the applicable workpiece size range is wide, the manpower is saved, and the economic benefit of processing production is improved.

The end of the workpiece supporting plate 5 in the embodiment is also provided with a rubber cushion block 6, which plays a role in protecting the sliding block 16, the connecting plate 17 and the clamping plate 18 in the clamp from being impacted. The screw 21 is preferably a T-shaped screw.

Referring to fig. 1 and 2, the left side fixing bracket includes a left fixing base plate 2, a left vertical plate 3 perpendicular to the left fixing base plate 2, and a left rib plate 4 attached to the left fixing base plate 2 and the left vertical plate 3; and the number of the left rib plates 4 is 2, and 2 left rib plates 4 are positioned on two sides of the left vertical plate 3.

The right side fixing bracket comprises a right fixing bottom plate 8, a right vertical plate 9 perpendicular to the right fixing bottom plate 8 and a right rib plate 10 attached to the right fixing bottom plate 8 and the right vertical plate 9; and the number of the right rib plates 10 is 2,2 right rib plates 10 are positioned on two sides of the right vertical plate 9, and the servo motor 11 is positioned between the 2 right rib plates 10.

A sensor bracket 20 is also arranged on the clamp base 1, and a photoelectric sensor 19 is arranged in the sensor bracket 20. The clamp base 1 is further provided with a guide rail seat 14, two sides of the guide rail seat 14 are respectively provided with a left supporting plate 15 and a right supporting plate 13, two ends of a screw rod 21 are rotatably fixed on the left supporting plate 15 and the right supporting plate 13, and one end of the left supporting plate 15 is also propped against the bottom of the workpiece supporting plate 5 and used for supporting the workpiece supporting plate 5. The screw rod 21 in the embodiment is fixedly connected by the left support plate 15 and the right support plate 13, and a rolling bearing is arranged at the joint of the screw rod 21 and the left support plate 15 and the right support plate 13; the left support plate 15 and the right support plate 13 are fixed to both ends of a rail seat 14 connected to the clamp base 1.

The vibration sensor 7 is used for converting the received vibration signal into a measurable electric signal and feeding the electric signal back to the control system; the photoelectric sensor 19 is used for converting a rotation signal of the screw rod 21 into a measurable electric signal and feeding the electric signal back to the control system; the control system controls the rotating speed and torque of the servo motor according to the received electric signals. The servo motor 11 in this embodiment has a brake and ethernet communication function. Specifically, as shown in fig. 4, the electrical signals collected by the vibration sensor 7 and the photoelectric sensor 19 are directly fed back to the programmable logic controller PLC, and then the programmable logic controller PLC controls the servo motor to make corresponding actions through the switch, and a human-machine interface (HMI) is used for setting control parameters such as a clamping initial position, a speed, a moment and the like and transmitting the control parameters to the PLC through the switch. The programmable logic controller PLC sends an instruction to the servo driver through the switch, the servo driver controls the servo motor to rotate, and the servo motor controls the sliding block 16, the connecting plate 17 and the clamping plate 18 in the clamp to clamp or unclamp a workpiece through the screw rod.

According to one of the above embodiments, the present invention further provides a control method of an electric clamp for a cylindrical workpiece, the control method including:

step S1, setting the starting position, clamping speed and clamping moment values of an electric clamp on a human-computer interface according to the size of a workpiece and the processing production requirement, clicking a zero return button after parameters are set, driving a clamping plate on the electric clamp by a servo motor to start zero return positioning, and rapidly moving the clamping plate to the starting position after zero position searching, so as to finish preparation work;

s2, when a workpiece is positioned on a workpiece supporting plate, a clamping button is clicked, a clamping plate on an electric clamp starts to clamp the workpiece at a set speed and moment, the clamping state is detected in real time through a vibration sensor, when the workpiece loosens in the machining process, the electric clamp can generate abnormal vibration, the vibration sensor feeds back the signal to a control system, and the control system compensates the clamping force;

and S3, after the workpiece is processed, clicking a release button, and rapidly returning a clamping plate on the electric clamp to a clamping starting position, so that the clamping plate reciprocates to rapidly clamp the workpiece.

Above, the embodiment of the invention provides the electric clamp for the cylindrical workpiece and the control method thereof, and the electric clamp for the cylindrical workpiece uses the servo motor to drive the clamp to clamp and loosen the workpiece instead of the traditional manual work, so that the defects of pneumatic and hydraulic driving are overcome, the stable and rapid clamping of the workpiece is realized, and the working efficiency is greatly improved. Because the servo motor is used for driving, a moment mode can be used during clamping, so that the accurate control of the clamping moment is realized, stable and adjustable clamping force is provided, and the damage to a workpiece is avoided. For cylindrical workpieces with different diameters, the distance between the clamping plate and the workpiece supporting plate can be adjusted by setting the starting position of the clamp through parameters, so that the device can be applicable to workpieces with different sizes.

In summary, although the present invention has been described in terms of the preferred embodiments, the above-mentioned embodiments are not intended to limit the invention, and those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention, so that the scope of the invention is defined by the appended claims.

Claims (10)

1. The electric clamp for the cylindrical workpiece is characterized by comprising a clamp base, a workpiece supporting plate, a vibration sensor, a servo motor, a coupler, a sliding block, a connecting plate, a clamping plate, a screw rod, two polished rods and a fixing bracket;

the fixing support comprises a left fixing support and a right fixing support which are positioned on the two end surfaces of the clamp base, the workpiece supporting plate is horizontally fixed on the left fixing support, and the vibration sensor is arranged on the bottom surface of the workpiece supporting plate; the servo motor is mounted with the right side fixing bracket through a screw; the connecting plate is arranged on the surface of the sliding block, the clamping plate is arranged on the surface of the connecting plate, and the clamping plate and the sliding block are installed together at an angle of 45 degrees through the connecting plate;

one end of the screw rod is connected with an output shaft of the servo motor through the coupler; the two polished rods are arranged on two sides of the screw rod in parallel; the sliding block penetrates through the screw rod and the two polished rods, wherein a nut and two linear bearings are arranged on the sliding block, the sliding block is connected with the screw rod in a matched mode through the nut, and the sliding block is connected with the two polished rods in a matched mode through the two linear bearings.

2. The motorized clasper of cylindrical workpiece according to claim 1, wherein the end of the workpiece support plate is further provided with a rubber pad.

3. The motorized clasper of claim 1, wherein the screw is a T-shaped screw.

4. The electric clamp of the cylindrical workpiece according to claim 1, wherein the left side fixing bracket comprises a left fixing bottom plate, a left vertical plate perpendicular to the left fixing bottom plate, and a left rib plate attached to the left fixing bottom plate and the left vertical plate; and the number of the left rib plates is 2, and 2 left rib plates are positioned on two sides of the left vertical plate.

5. The electric clamp of a cylindrical workpiece according to claim 1, wherein the right side fixing bracket comprises a right fixing bottom plate, a right vertical plate perpendicular to the right fixing bottom plate, and a right rib plate attached to the right fixing bottom plate and the right vertical plate; and the number of the right rib plates is 2,2 right rib plates are positioned on two sides of the right vertical plate, and the servo motor is positioned between 2 right rib plates.

6. The electric clamp for cylindrical workpieces according to claim 1, wherein a sensor support is further arranged on the clamp base, and a photoelectric sensor is arranged in the sensor support.

7. The electric clamp for cylindrical workpieces according to claim 1, wherein a guide rail seat is further arranged on the clamp base, a left support plate and a right support plate are respectively arranged on two sides of the guide rail seat, and two ends of the screw rod are rotatably fixed on the left support plate and the right support plate.

8. The electric clamp of claim 7, wherein the left support plate has one end supported against the bottom of the workpiece support plate for supporting the workpiece support plate.

9. The electric clamp for cylindrical workpieces according to claim 6, wherein the vibration sensor is used for converting received vibration signals into measurable electric signals and feeding the measurable electric signals back to the control system; the photoelectric sensor is used for converting the rotation signal of the screw rod into a measurable electric signal and feeding the measurable electric signal back to the control system; the control system controls the rotating speed and the moment of the servo motor according to the received electric signals, wherein the servo motor has the functions of braking and Ethernet communication.

10. A control method of an electric clamp for a cylindrical workpiece, the control method comprising:

step S1, setting the starting position, clamping speed and clamping moment values of an electric clamp on a human-computer interface according to the size of a workpiece and the processing production requirement, clicking a zero return button after parameters are set, driving a clamping plate on the electric clamp by a servo motor to start zero return positioning, and rapidly moving the clamping plate to the starting position after zero position searching, so as to finish preparation work;

s2, when a workpiece is positioned on a workpiece supporting plate, a clamping button is clicked, a clamping plate on an electric clamp starts to clamp the workpiece at a set speed and moment, the clamping state is detected in real time through a vibration sensor, when the workpiece loosens in the machining process, the electric clamp can generate abnormal vibration, the vibration sensor feeds back the signal to a control system, and the control system compensates the clamping force;

and S3, after the workpiece is processed, clicking a release button, and rapidly returning a clamping plate on the electric clamp to a clamping starting position, so that the clamping plate reciprocates to rapidly clamp the workpiece.

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