CN209936629U - Automatic grinding wheel cutting device for continuously and circumferentially cutting cylindrical rod piece - Google Patents
Automatic grinding wheel cutting device for continuously and circumferentially cutting cylindrical rod piece Download PDFInfo
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- CN209936629U CN209936629U CN201920396302.3U CN201920396302U CN209936629U CN 209936629 U CN209936629 U CN 209936629U CN 201920396302 U CN201920396302 U CN 201920396302U CN 209936629 U CN209936629 U CN 209936629U
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Abstract
The utility model discloses an automatic grinding wheel cutting device for continuous circumferential cutting of cylindrical rods, which comprises a grinding wheel, a cutting motor, a lead screw sliding table and a servo motor, wherein the lead screw sliding table and the cylindrical rods are vertically arranged at intervals, the grinding wheel is arranged on the lead screw sliding table through the cutting motor, the servo motor drives the lead screw sliding table to drive the cutting motor sliding table to linearly move, and the cutting motor drives the grinding wheel to rotate the circumferential cutting of the cylindrical rods; the automatic cutting device is characterized by further comprising a current acquisition unit and a PLC (programmable logic controller), wherein the current acquisition unit is used for acquiring the current value of the cutting motor, the PLC controls the operation of the cutting motor and the servo motor according to the acquired current signal, so that the automatic cutting of the rod piece is completed, and the automatic cutting device is high in cutting precision and strong in reliability. The method can automatically compensate the abrasion loss of the grinding wheel, thereby ensuring the cutting precision of the grinding wheel during continuous cutting.
Description
Technical Field
The utility model relates to a cutting equipment, concretely relates to emery wheel automatic cutting device of continuous circumference cutting cylinder member.
Background
The cutting of the workpiece is generally performed using a motorized abrasive disc machine. When the electric grinding wheel machine cuts a workpiece, the grinding wheel can be worn, and the diameter of the grinding wheel can be gradually reduced. When the electric grinding wheel machine continuously and automatically cuts the workpiece, the diameter of the workpiece to be cut is assumed to be unchanged, and if the diameter of the grinding wheel is not compensated, the cutting amount of each time is gradually reduced until the grinding wheel can not cut the workpiece.
The method for compensating the grinding wheel of the electric grinding wheel machine generally comprises manual compensation and automatic compensation.
The manual compensation has high requirements on the adjustment precision of the equipment and the responsibility of operators, the working efficiency is low, and the precision is difficult to control. The automatic compensation can reduce the dependence on people and ensure the consistency and the accuracy of each cutting.
Chinese patent CN206366899U discloses a grinding wheel travel compensation device of a full-automatic pipe cutting machine, which comprises a frame, a machine sleeve and a lifting compensation device, wherein the frame is provided with a guide rail seat, and the guide rail seat is provided with an upright post and a pipe clamping device for clamping a workpiece; the machine sleeve is arranged on the upright post in a sliding manner, and a grinding wheel is arranged on the machine sleeve; the lifting compensation device comprises a hydraulic oil cylinder connected with the machine sleeve, a limit screw and a position indicating shaft which is kept to lift together with the machine sleeve, wherein the top ends of the position indicating shaft and the limit screw are respectively and correspondingly provided with a position indicating sensor and a limit sensor, the limit screw is driven by a motor through a transmission device, and the motor is provided with a driving sensor; the distance sensor, the hydraulic oil cylinder, the position indicating sensor, the limiting sensor and the driving sensor are respectively connected with the control system. The utility model discloses, be equipped with lift compensation arrangement for the emery wheel is accomplishing the cutting at every turn and goes upward the return back, and its cutting lower edge keeps invariable with the interval of work piece, has reduced emery wheel unnecessary and has gone upward the stroke, has improved work efficiency.
Chinese patent CN206326119U discloses a precision casting automatic cutout machine, which comprises a frame, be equipped with in the frame and be used for driving frock mechanism and cutting mechanism that the foundry goods removed, its technical scheme's main points are: cutting mechanism is including locating cutting base in the frame, be equipped with cutting piece fixed axle and the automatically regulated that is used for fixed cutting piece on the cutting base cutting piece fixed axle vertical height's altitude mixture control mechanism, be equipped with the cutting piece inductor that is used for responding to cutting piece outer fringe profile and sends control signal in the frame, work as cutting piece inductor senses cutting piece outer fringe profile and diminishes, to altitude mixture control mechanism signals makes it raise the vertical height of cutting piece fixed axle. The utility model provides an accurate foundry goods automatic cutout machine, artifical centre gripping foundry goods material loading back can accomplish the cutting foundry goods automatically, and is safe high-efficient, diminishes to the size of cutting piece and carries out the auto-feed compensation, realizes real automatic operation.
Chinese patent CN207971801U discloses a full-automatic stub bar stock cutting system that goes stub bar material, its structure includes the work or material rest of automatic reason material, the pay-off gyro wheel of adjustable height, the measuring device of measurement length, the material feeding unit of fixed length pay-off forward, but compensation mechanism, movable cutting aircraft nose, man-machine interactive system and the feed divider of automatic compensation rotational speed and position, the pay-off gyro wheel is located on the work or material rest, be equipped with measuring device between work or material rest and the material feeding unit, material feeding unit discharge gate department is equipped with feed divider, compensation mechanism locates material feeding unit upper portion. The cutting system replaces manual operation, guarantees personal safety of operators while guaranteeing cutting quality, improves labor efficiency, is convenient to adjust, is simple to manufacture, and needs few material resources.
The above-mentioned patent all needs to adopt sensor detection emery wheel diameter or emery wheel and cutting workpiece's distance to pass through the wearing and tearing volume of elevating system compensation emery wheel, and its technical scheme is comparatively complicated, and cutting equipment overall structure is comparatively huge, and the operation of system relies on the measurement accuracy and the reliability size of sensor completely, and cutting accuracy is low, and the reliability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a emery wheel automatic cutting device of continuous circumference cutting cylinder member through the electric current under detecting cutting motor no-load current and operating condition, judges whether the grinding wheel cuts the work piece, realizes the compensation after the grinding wheel wearing and tearing through the displacement that increases grinding wheel motor, need not additionally to increase various measuring sensing device and mechanical structure, simple structure, and equipment overall dimension is little, and cutting accuracy is high, and the reliability is high.
Therefore, the utility model adopts the technical scheme that:
the automatic grinding wheel cutting device comprises a grinding wheel, a cutting motor, a screw rod sliding table and a servo motor, wherein the screw rod sliding table and the cylindrical rod are vertically arranged at intervals; the automatic cutting device is characterized by further comprising a current acquisition unit and a PLC (programmable logic controller), wherein the current acquisition unit is used for acquiring the current value of the cutting motor, and the PLC controls the grinding wheel to automatically cut the cylindrical rod piece according to the acquired current value.
Furthermore, the current collecting unit comprises an I/V conversion module and an A/D conversion module, the I/V conversion module converts the collected current value of the cutting motor into an analog voltage value, the A/D conversion module converts the analog voltage value into a digital voltage value, and the PLC controls the grinding wheel to automatically cut the cylindrical rod piece according to the digital voltage value.
Furthermore, the current acquisition unit comprises an I/I conversion module and an A/D conversion module, the I/I conversion module converts the acquired current value of the cutting motor into an analog current value, the A/D conversion module converts the analog current value into a digital current value, and the PLC controls the grinding wheel to automatically cut the cylindrical rod piece according to the digital current value.
The analog signal conversion of electric current is digital signal, can directly be received by the PLC controller, the monitoring of the electric current transform when being convenient for to the emery wheel cutting. The digital signal has higher anti-interference capability, longer transmission distance, small distortion amplitude and higher control of cutting precision in the transmission process, and the obtained data is convenient to process and exchange.
The utility model has the advantages that:
1. the utility model discloses a emery wheel automatic cutting device, simple structure, the operation is reliable.
2. The utility model discloses an automatic cutting device for grinding wheel judges whether the grinding wheel cuts the work piece through the electric current that detects under cutting motor no-load current and the operating condition, after cutting the work piece, continues the cutting according to the depth of cut that has set for, guarantees the unanimity of depth of cut, and cutting accuracy is high, and the cutting reliability is high.
Drawings
Fig. 1 is a schematic system configuration diagram of embodiment 1 of the automatic grinding wheel cutting device according to the present invention, showing the installation positions of the respective components and the connection relationship between the respective modules.
Fig. 2 is a schematic system configuration diagram of embodiment 2 of the automatic cutting device for grinding wheels according to the present invention, showing the installation positions of the respective components and the connection relationship between the respective modules.
Fig. 3 is an initial state diagram of the automatic cutting device for grinding wheel according to the present invention, showing the state of the cutting motor at the original position.
Fig. 4 is a first working state diagram of the automatic cutting device with grinding wheel according to the present invention, which shows the state when the cutting motor moves fast to the side of the glass rod.
Fig. 5 is a second operation diagram of the automatic cutting device with grinding wheel according to the present invention, which shows the state of the cutting motor cutting into the glass rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1, the automatic grinding wheel cutting device for continuously and circumferentially cutting a cylindrical rod comprises a grinding wheel 8, a cutting motor 2, a screw rod sliding table 3 and a servo motor 1. Lead screw slip table 3 and the perpendicular setting of 7 looks intervals of cylinder member, cutting motor 2 slides through its motor cabinet and locates on lead screw slip table 3, and the grinding wheel 8 suit is on cutting motor 2's motor shaft, and servo motor drive lead screw slip table 3 drives cutting motor 2 and grinding wheel 8 along slip table linear movement, and cutting motor 2 drive grinding wheel 8 rotates. The lead screw slip table is prior art, and its structure and theory of operation are no longer repeated here. Still include current acquisition unit and PLC controller 6, PLC controller 6 is connected with cutting motor 2, servo motor 1 and current acquisition unit electricity.
In this embodiment, the current collection unit includes an I/V (current-to-voltage conversion) conversion module 4 and an a/D (analog-to-digital conversion) conversion module 5. The I/V conversion module 4 converts the acquired current value of the cutting motor 2 into an analog voltage value, the A/D conversion module 5 converts the analog voltage value into a digital voltage value, and the PLC 6 controls the grinding wheel 8 to automatically cut the cylindrical rod 7 according to the digital voltage value.
The I/V module, the A/D module and the PLC are all the prior art, in the embodiment, the I/V module is an HKK13 type direct current transmitter manufactured by Beijing Hua accuse industry science and technology development Limited, the A/D module is a Mitsubishi FX2N-2AD model, and the PLC is an FX3GA-40MT model.
In this embodiment, the cylindrical rod is a glass rod. In other embodiments, the cylindrical rod may also be round steel, plastic rod, or other cylindrical rod. This example illustrates the implementation of the technical solution of the present application by taking a glass rod as an example.
The glass rod with a certain length needs to be cut into short rods with a section by an electric abrasive disc machine.
The existing cutting mode is as follows: after the glass rod is installed, the cutting motor moves to the position beside the cut glass rod from the original point according to the set fast moving distance, then slowly moves and cuts the glass rod according to the set cutting distance, and after the cutting is completed, the glass rod quickly returns to the original point. Along with the increase of the cutting number of times of the grinding wheel, the excircle abrasion of the grinding wheel is aggravated, under the condition that the cutting motor moves at a high speed and cuts at a low speed to a constant distance, the depth of the glass rod to be cut is reduced, an operator can adjust parameters once about every 20 minutes according to the cutting depth, and when the operator does not adjust the parameters in time, the scrapping of the glass rod due to the fact that the cutting depth is insufficient is generated. In the whole production process, higher requirements are put forward on the concentration degree of operators, and the dependence degree of equipment on people is higher.
If the cutting amount is consistent and accurate each time, the abrasion of the grinding wheel is compensated.
The design principle of the utility model is that:
①, setting an initial ' cutting motor fast moving distance A1 ', the parameter only works after each time a new grinding wheel is replaced, the parameter value will increase continuously along with the reduction of the diameter of the outer circle of the grinding wheel, because the grinding wheel has a distance with the glass rod to be cut, in order to improve the production efficiency, the grinding wheel needs to move fast to the side of the glass rod every time cutting, then move slowly and cut, along with the increase of the abrasion of the outer circle of the grinding wheel, if the ' cutting motor fast moving distance ' is not changed, the distance of the cutting motor slow moving will increase, the production efficiency will decrease, therefore, the application designs a ' cutting motor fast moving distance ' real-time replacing step, on the basis of the initial ' cutting motor fast moving distance A1 ', and the difference between the coordinate value when the grinding wheel cuts the glass rod and the coordinate value of the glass rod last cutting on each time, obtain a new value and replace the ' cutting motor fast moving distance ' before, namely, the abrasion amount of the outer circle of the grinding wheel is superposed on the ' cutting motor fast moving distance, the grinding wheel is guaranteed to reduce the grinding wheel moving distance in the cutting process, and the grinding wheel is compensated in the production efficiency.
② sets An automatic reset function after replacing a new grinding wheel, when a new grinding wheel is replaced, the diameter of the grinding wheel is restored to the original diameter, and the diameter is increased, which means that if the cutting motor moves according to the 'cutting motor fast moving distance' before replacing the grinding wheel, the cutting motor will collide with the glass rod, therefore, the application designs An automatic reset step after replacing the grinding wheel, and presses the 'confirm replace new grinding wheel' button after replacing a new grinding wheel, and the initial 'cutting motor fast moving distance A1' data covers the 'cutting motor fast moving distance An' data before replacing the grinding wheel.
Referring to fig. 2, the embodiment 2 is substantially the same as the embodiment 1 in technical solution, and is different in that the current collecting unit includes an I/I (large current to small current) conversion module 41 and an a/D (analog-to-digital conversion) conversion module 51, the I/I conversion module 41 converts the collected cutting motor current value into an analog current value, the a/D conversion module 51 converts the analog current value into a digital current value, and the PLC controller 61 controls the grinding wheel 8 to automatically cut the cylindrical rod 7 according to the digital current value.
The I/I module, the A/D module and the PLC are all the prior art, in the embodiment, the HK-D4I type direct current transmitter manufactured by Beijing Hua accuse industry science and technology development Limited is selected as the I/I module, Mitsubishi FX2N-2AD is selected as the A/D module, and FX3GA-40MT type is selected as the PLC.
Take the automatic cutting device of grinding wheel of embodiment 1 to cut a glass rod with a length of 3m and a diameter of 8mm as an example (the cutting depth of the glass rod requires 1.5mm, and the cutting distance is 90mm), it is described that the utility model discloses an operating method of continuous circumferential cutting cylinder member is as follows:
1) replacing a new grinding wheel and clicking a key for determining to replace the new grinding wheel;
2) starting the cutting motor 2, enabling the grinding wheel 8 to rotate at a high speed, and enabling the glass rod to rotate;
3) the PLC 6 controls the servo motor 1 to drive the cutting motor 2 on the screw rod sliding table 3 to move to the position close to the glass rod from the original position according to the set initial 'cutting motor fast moving distance A1', the distance between the outer edge of the grinding wheel 8 and the outer edge of the glass rod 7 is 5mm at the moment, and then the cutting motor moves slowly;
4) when the grinding wheel 8 touches the glass rod 7, the current of the cutting motor 2 is increased, the I/V module 4 reads the current value and converts the current value into an analog voltage value of 0-10V, the analog voltage is converted into digital voltage through the A/D module 5, the PLC reads the digital voltage value and compares the digital voltage value with a set digital voltage value for generating interruption, when the digital voltage value is larger than the digital voltage value, the PLC 6 generates interruption, and the PLC 6 reads and stores the current coordinate value B1 of the cutting motor on the screw rod sliding table in an interruption program, namely the moving pulse number of the servo motor;
5) then the cutting motor 2 continuously moves for cutting the glass rod 7 by 1.5mm according to the set parameters, and after the glass rod is cut in place, the PLC controller 6 controls the servo motor 1 to drive the cutting motor 2 on the screw rod sliding table 3 to return to the original position;
6) the glass rod is transversely moved by 90mm, the cutting motor 2 is moved to the position near the glass rod from the original position according to the numerical value in the parameter of 'the cutting motor rapidly moves the distance A1', and then the glass rod is slowly moved;
7) when the grinding wheel 8 of the cutting motor 2 cuts the glass rod 7 again, the current of the cutting motor 2 becomes large, the PLC controller 6 interrupts again, the current coordinate value B2 of the cutting motor on the screw rod sliding table is stored, the coordinate value B2 is subtracted from the coordinate value B1, the difference value is added with the initially set 'cutting motor fast moving distance A1', and a new 'cutting motor fast moving distance A2' is obtained;
8) repeating the steps from 5) to 7), covering the moving distance An of the new cutting motor obtained each time with the moving distance An-1 of the previous time until the numerical value of the moving distance An reaches the upper limit of the abrasion loss of the grinding wheel, stopping the equipment and waiting for replacing the grinding wheel;
9) and when the numerical value of the 'fast moving distance An of the cutting motor' continuously increases to reach the set upper limit, the abrasion of the grinding wheel reaches the upper limit, the equipment is stopped, and the grinding wheel is prompted to be replaced.
Take the automatic cutting device of grinding wheel of embodiment 2 to cut a glass rod with a length of 3m and a diameter of 8mm as an example (the cutting depth of the glass rod requires 1.5mm, and the cutting interval is 90mm), it is described that the utility model discloses an operating method of continuous circumferential cutting cylinder member is as follows:
1) replacing a new grinding wheel and clicking a key for determining to replace the new grinding wheel;
2) starting the cutting motor 2, enabling the grinding wheel to rotate at a high speed, and enabling the glass rod 7 to rotate;
3) the PLC controller 61 controls the servo motor 1 to drive the cutting motor 2 on the screw rod sliding table 3 to move to the position near the glass rod 7 from the original position according to the set initial 'cutting motor fast moving distance A1', the distance between the outer edge of the grinding wheel 8 and the outer edge of the glass rod 7 is 5mm at the moment, and then the cutting motor moves slowly;
4) when the grinding wheel touches the glass rod, the current of the cutting motor 2 is increased, the I/I module 41 reads the current value and converts the current value into an analog current value of 4-20 mA, the analog current value is converted into a digital current value through the A/D module 51, the PLC 61 reads the digital current value and compares the digital current value with a set digital current value for generating interruption, when the digital current value is larger than the digital current value, the PLC 61 generates interruption, and the PLC reads and stores a current coordinate value B1 of the cutting motor 2 on the screw rod sliding table 3 in an interruption program, namely the moving pulse number of the servo motor 1;
5) then the cutting motor 2 continuously moves for cutting the glass rod 7 by 1.5mm according to the set parameters, and after the glass rod is cut in place, the PLC controller 61 controls the servo motor 1 to drive the cutting motor 2 on the screw rod sliding table to return to the original position;
6) the glass rod is transversely moved by 90mm, the cutting motor 2 is moved to the position near the glass rod 7 from the original position according to the numerical value in the parameter of 'the cutting motor rapidly moves the distance A1', and then the glass rod is slowly moved;
7) when the grinding wheel 8 of the cutting motor cuts the glass rod 7 again, the current of the cutting motor 2 becomes large, the PLC controller 61 interrupts again, the current coordinate value B2 of the cutting motor on the screw rod sliding table is stored, the coordinate value B2 is subtracted from the coordinate value B1, the difference value is added with the initially set 'cutting motor fast moving distance A1', and a new 'cutting motor fast moving distance A2' is obtained;
8) repeating the steps from 5) to 7), covering the moving distance An of the new cutting motor obtained each time with the moving distance An-1 of the previous time until the numerical value of the moving distance An reaches the upper limit of the abrasion loss of the grinding wheel, stopping the equipment and waiting for replacing the grinding wheel;
9) and when the numerical value of the 'fast moving distance An of the cutting motor' continuously increases to reach the set upper limit, the abrasion of the grinding wheel reaches the upper limit, the equipment is stopped, and the grinding wheel is prompted to be replaced.
Parts which are not specifically described in the above description are prior art or can be realized by the prior art.
Claims (3)
1. The automatic grinding wheel cutting device for continuously and circumferentially cutting the cylindrical rod piece is characterized by comprising a grinding wheel, a cutting motor, a screw rod sliding table and a servo motor, wherein the screw rod sliding table and the cylindrical rod piece are vertically arranged at intervals; the automatic cutting device is characterized by further comprising a current acquisition unit and a PLC (programmable logic controller), wherein the current acquisition unit is used for acquiring the current value of the cutting motor, and the PLC controls the grinding wheel to automatically cut the cylindrical rod piece according to the acquired current value.
2. The automatic cutting device for grinding wheels according to claim 1, wherein the current collection unit comprises an I/V conversion module and an a/D conversion module, the I/V conversion module converts the collected cutting motor current value into an analog voltage value, the a/D conversion module converts the analog voltage value into a digital voltage value, and the PLC controller controls the grinding wheel to automatically cut the cylindrical rod member according to the digital voltage value.
3. The automatic cutting device with grinding wheel according to claim 1, wherein the current collection unit comprises an I/I conversion module and an a/D conversion module, the I/I conversion module converts the collected cutting motor current value into an analog current value, the a/D conversion module converts the analog current value into a digital current value, and the PLC controller controls the grinding wheel to automatically cut the cylindrical rod piece according to the digital current value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396302.3U CN209936629U (en) | 2019-03-27 | 2019-03-27 | Automatic grinding wheel cutting device for continuously and circumferentially cutting cylindrical rod piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920396302.3U CN209936629U (en) | 2019-03-27 | 2019-03-27 | Automatic grinding wheel cutting device for continuously and circumferentially cutting cylindrical rod piece |
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| CN209936629U true CN209936629U (en) | 2020-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109877689A (en) * | 2019-03-27 | 2019-06-14 | 南京春辉科技实业有限公司 | The grinding wheel automatic cutting device of continuous circumferentially cutting cylindrical rod and compensation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109877689A (en) * | 2019-03-27 | 2019-06-14 | 南京春辉科技实业有限公司 | The grinding wheel automatic cutting device of continuous circumferentially cutting cylindrical rod and compensation method |
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