CN115303823B - Multi-channel high-precision powder quantitative feeding system and feeding process thereof - Google Patents
Multi-channel high-precision powder quantitative feeding system and feeding process thereof Download PDFInfo
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- CN115303823B CN115303823B CN202211243911.8A CN202211243911A CN115303823B CN 115303823 B CN115303823 B CN 115303823B CN 202211243911 A CN202211243911 A CN 202211243911A CN 115303823 B CN115303823 B CN 115303823B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/46—Devices for emptying otherwise than from the top using screw conveyors
- B65G65/463—Devices for emptying otherwise than from the top using screw conveyors arranged vertically or substantially vertically within the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/005—Control arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/181—Preventing escape of dust by means of sealed systems
- B65G69/182—Preventing escape of dust by means of sealed systems with aspiration means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
- G01G19/32—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them using two or more weighing apparatus
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Physics & Mathematics (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
The invention relates to the technical field of quantitative feeding, in particular to a multi-channel high-precision powder quantitative feeding system which comprises a frame, an automatic control system arranged outside the frame, a plurality of blanking mechanisms, a multi-channel transmission mechanism, an XYZ movement mechanism and a plurality of weighing mechanisms, wherein the blanking mechanisms are arranged at the top of the frame side by side and are electrically connected with the automatic control system; the multi-channel transmission mechanism is positioned below the blanking mechanism and is provided with transmission channels with the same number as that of the blanking mechanisms, the XYZ motion mechanism is connected below the multi-channel transmission mechanism, the weighing mechanisms are connected to the tops of the XYZ motion mechanisms in parallel, and the upper parts of the weighing mechanisms penetrate through the multi-channel transmission mechanism to support and lift the container; through the movement of the XYZ movement mechanism, the independent weighing of the bin and the control of the blanking speed of the blanking mechanism, the charging precision of each container is guaranteed to be +/-50 g; the feeding process of the multichannel high-precision powder quantitative feeding system is self-adaptive to adjustment, is suitable for various materials, and does not need manual adjustment.
Description
Technical Field
The invention relates to the technical field of quantitative feeding, in particular to a multi-channel high-precision powder quantitative feeding system and a feeding process thereof.
Background
In recent years, lithium ion batteries have become more and more popular due to their excellent performance in terms of high energy density, high voltage, no pollution, long cycle life, rapid charge and discharge, and the like, and their increasingly lower manufacturing costs. With the continuous development of the information industry, the demand for lithium ion batteries is also increasing.
At present, most of the capacity of single powder quantitative feeding equipment in China is concentrated on processing 90-150 containers in one hour, single-line conveying is adopted for material conveying, the capacity requirement of the new energy industry which is expanded day by day cannot be met, even if two devices are connected in parallel for production, cost is doubled, the occupied area of a factory building is too large, and the two devices are rarely adopted. Therefore, a complete set of multi-channel high-capacity intelligent powder quantitative feeding system needs to be developed in the industry, so that the processing quality of powder materials is improved, the capacity is improved, and the intelligent control level is improved.
The traditional powder quantitative feeding equipment can only charge a single container at one time, the efficiency is low, and the containers are easy to accumulate on a production line; the layout limitation is large, and the requirement on the floor area of a factory building is high; the working environment has larger dust and finer powder, the sealing effect of the common structure at present is poor, and the dust is easy to fall and accumulate.
Aiming at the defects, the improvement difficulty lies in that: the floor area is reduced, two or more devices need to be connected in parallel in a limited space, and a plurality of mechanisms in the devices interfere with each other to influence the movement; when XYZ three shafts of the parallel containers synchronously operate, the feeding precision of the containers is difficult to ensure at the same time; the same shaft bears the parallel containers, and the span of the shaft is too large and is easy to bend; the spacing between the storage bins is small, and the interference surfaces are more if the storage bins are connected in parallel; the space of the mechanism is insufficient; the storage bins are separately weighed, and the calculated amount of the electrical programming is large and complicated; the containers on the conveying platform cannot reach the weighing mechanism at the same time, and the error of a few tenths of a second occurs; during production, the dust amount in the cavity is large, and the condition that the transmission photoelectric device cannot detect the dust amount on the conveying platform can be generated.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: overcomes the defects in the prior art and provides a multi-channel high-precision powder quantitative feeding system.
The technical scheme adopted by the invention for solving the technical problems is as follows: a multi-channel high-precision powder dosing system comprises:
frame and the automatic control system who sets up outside the frame to and:
the blanking mechanisms are arranged at the top of the frame side by side, are electrically connected with the automatic control system, and are controlled by the automatic control system to respectively discharge materials vertically downwards;
the multi-channel transmission mechanism is positioned below the blanking mechanism, is provided with transmission channels with the same number as the blanking mechanism and is used for synchronously transmitting and receiving the containers discharged by the blanking mechanism,
an XYZ motion mechanism connected below the multi-channel transmission mechanism for driving the multi-channel transmission mechanism to move in X, Y and Z directions,
a plurality of weighing mechanisms which are connected with the top of the XYZ motion mechanism in parallel, the upper parts of the weighing mechanisms penetrate through the multi-channel transmission mechanism to support and lift the container so as to measure the weight of the materials in the container,
the weighing mechanism, the XYZ motion mechanism and the multi-channel transmission mechanism are also electrically connected with the automatic control system.
Further, unloading mechanism includes the feed bin, installs the ejection of compact unit at the feed bin top and sets up the fender material unit in the feed bin bottom, and the feed bin upper portion of adjacent unloading mechanism has vertical face of dodging, ejection of compact unit includes spiral discharge bar, drive spiral discharge bar pivoted first driving piece, stirring piece and drive stirring piece pivoted second driving piece, the fender material unit is including driving actuating cylinder, even board and flip board, drive the even board that the slope set up is connected to actuating cylinder's output, the flip board is connected to the lower extreme of even board.
The upper parts of the bins of the adjacent blanking mechanisms are provided with vertical avoiding surfaces, so that weighing can not be influenced mutually when the bins are provided with errors; the spiral discharging rod and the stirring piece are respectively driven by the two driving pieces, the discharging and stirring power is sufficient, the discharging efficiency is improved, and the rotating speed of the spiral discharging rod and the rotating speed of the stirring piece can be independently adjusted according to requirements; the driving cylinder drives the connecting plate to rotate, so that the flip cover plate rotates, and the operation is simple and convenient and is easy to realize.
Furthermore, the feed bin is of a funnel-shaped structure, the top of the feed bin is connected with a bin cover, a feed inlet and a dust suction port are formed in the bin cover, and three weight sensors are uniformly distributed on the outer wall of the feed bin.
The feed inlet and the dust suction port are arranged on the bin cover, so that the installation is convenient; three weight sensors are uniformly distributed on the outer wall of each bin, each bin is weighed by three points, the material amount in each bin is kept in a reduction weighing mode, and the weight sensors are matched with a weighing mechanism below the bins to ensure smooth discharging, and no material blockage or material shortage is caused; the charging precision is ensured.
Furthermore, driving piece mounting bracket is connected at the top of cang gai, first driving piece and second driving piece are installed respectively at the top and the lateral wall of driving piece mounting bracket, and spiral discharge bar is connected to the output of first driving piece, the lower extreme of spiral discharge bar runs through the feed bin bottom, the output of second driving piece is provided with initiative bevel gear, is equipped with the installation axle sleeve outside the spiral discharge bar, the top of installation axle sleeve is fixed with the driven bevel gear with initiative bevel gear meshing, and the sub-unit connection of installation axle sleeve has the stirring piece. So set up, save installation space, avoid producing between the feed bin and interfere.
Furthermore, the stirring piece includes first puddler and the second puddler that is located spiral discharge bar both sides respectively, first puddler and second puddler are the formula of staggering and distribute, and the tip between them all is L shape, and the tip extending direction of first puddler intersects with spiral discharge bar, and spiral discharge bar is kept away from to the tip extending direction of second puddler. So set up, can realize the intensive mixing in the whole space of feed bin.
Further, multichannel transmission device includes U-shaped transmission frame, a plurality of transmission roller, a plurality of separator and drive transmission roller pivoted conveying motor, and a plurality of transmission rollers transversely install side by side on the U-shaped transmission frame, a plurality of separators vertically install and form a plurality of transmission passageways on the transmission roller, and the through-hole that supplies weighing machine to pass is seted up to the bottom of U-shaped transmission frame, conveying motor installs in U-shaped transmission frame one side, and is equipped with photoelectricity proximity switch on the U-shaped transmission frame, installs the lift cylinder on the bottom plate of U-shaped transmission frame, install the place ahead on the lift cylinder and block the piece. The conveying motor is arranged on one side of the U-shaped conveying frame, so that the conveying frame is convenient to install and maintain; by adopting the photoelectric proximity switch, the in-place condition of the container can be accurately detected in a working environment with large dust.
Furthermore, the XYZ motion mechanism comprises an X-direction lead screw sliding block assembly, a Y-direction lead screw sliding block assembly and a Z-direction motion assembly, the Y-direction lead screw sliding block assembly is arranged on the X-direction lead screw sliding block assembly, the Z-direction motion assembly is arranged on the Y-direction lead screw sliding block assembly and comprises a servo motor, a driving gear, a driven gear, a lead screw nut and a Z-direction mounting plate, the servo motor is vertically mounted on one side edge of the Z-direction mounting plate through a motor mounting rack, the output end of the servo motor is connected with the driving gear, the lower end of the lead screw penetrates through the Y-direction lead screw sliding block assembly, the upper end of the lead screw penetrates through the Z-direction mounting plate and is connected with the weighing mechanism, the lead screw is sleeved with the lead screw nut connected with the Z-direction mounting plate, the bottom of the lead screw nut is fixedly provided with the driven gear in threaded connection with the lead screw, and the driven gear is connected with the driving gear through a synchronous belt; and guide rod assemblies connected to the transmission frame are arranged on two sides of the Z-direction mounting plate.
X drives Y to the lead screw sliding block assembly along X to the motion to the lead screw sliding block assembly, and Y drives Z to the motion subassembly along Y to the motion to the lead screw sliding block assembly, and Z drives the lead screw through servo motor, hold-in range, screw-nut and realizes the up-and-down motion to make weighing mechanism realize the up-and-down motion, the guide bar subassembly plays the effect of supporting the direction.
Further, weighing machine constructs including erection bracing board, jacking cylinder, weighing sensor, pan of steelyard, the jacking cylinder is installed in the erection bracing board, and its push rod connects the pan of steelyard, set up weighing sensor in the pan of steelyard.
The scale tray is driven to ascend through the jacking cylinder, the scale tray holds the container to ascend along with the container, and the weighing sensor is convenient to detect the weight of the container.
The invention also provides a feeding process of the multichannel high-precision powder quantitative feeding system, which comprises the following process steps:
s1: the automatic control system controls the conveying motor to start, synchronously conveys a plurality of containers, controls the conveying motor to stop when the containers reach the photoelectric proximity switch, and controls the lifting cylinder to push out the push rod to drive the front blocking piece to ascend to block the containers;
s2: the automatic control system controls the weighing sensor to reset, then controls the jacking cylinder to push out the push rod, the scale pan rises to a set position, the jacking cylinder stops acting, weight data of the empty container measured by the weighing sensor is transmitted to the automatic control system, and the automatic control system controls the weighing sensor to peel;
s3: the automatic control system controls the driving cylinder of the material blocking unit to act, the turnover cover plate is opened, and the multichannel transmission mechanism is moved by the XYZ movement mechanism to drive the container to move according to a specified route according to the charging time set by the automatic control system;
s4: the automatic control system respectively controls a driving piece of the blanking mechanism to start, weight data measured by the weighing sensor are transmitted to the automatic control system at regular intervals, the automatic control system is compared with a preset value at the time point to calculate a deviation value delta 1, then a rotating speed corresponding to the deviation value delta 1 is calculated according to a formula of blanking speed and time, and the rotating speed of the driving piece is adjusted through the automatic control system;
s5: after the rotating speed of the driving part is adjusted according to the step (S4), the automatic control system controls the weighing sensor to measure the weight of each container at the time point, two-by-two comparison is carried out to form a difference value, the difference value is compared with a preset two-by-two comparison difference value at the time point, another deviation value delta 2 is obtained through calculation, the weight data of one container in the minimum deviation value delta 2 is taken as a reference, the rotating speed of the driving part corresponding to the weight data of the other container is adjusted, then the rotating speeds of the driving parts corresponding to the other containers are sequentially adjusted, so that all the blanking mechanisms start blanking at the same time, and blanking is completed at the same time;
s6: the automatic control system controls the weighing sensor to measure the weight of each container after the blanking is finished, then controls the jacking cylinder to retract into the push rod, the scale pan descends to a set position, and the jacking cylinder stops acting;
s7: the automatic control system controls the conveying motor to start, and simultaneously controls the lifting cylinder to retract into the push rod to drive the front blocking piece to descend, and synchronously conveys a plurality of containers to enter the next procedure.
Further, the time interval in the step (S4) is 30 to 60ms.
Furthermore, the specific gravity of the powder material processed by the blanking mechanism in the step (S4) is 0.7-1.6 g/cm < 3 >, and the blanking weight of the blanking mechanism is 400-900 g/S.
Furthermore, the repose angle of the powder material in the container after the blanking mechanism finishes blanking in the step (S5) is 42-60 degrees.
The beneficial effects of the invention are:
the multichannel high-precision powder quantitative feeding system can synchronously charge a plurality of containers, and the charging precision of each container is +/-50 g; the blanking is automatically controlled without manual adjustment; the replaceability of the material is good, and the material can adapt to materials with various properties; the function of parallel connection is realized by the minimum distance, and the installation space of an installation customer site is reduced; the mounting position of the storage bin is ensured, the parallel connection is ensured not to interfere, and the weighing of the container is not influenced; the photoelectric proximity switch on the multi-channel transmission mechanism can work under the condition of high dust, and the efficiency is not influenced; the feeding process of the multi-channel high-precision powder quantitative feeding system is self-adaptive to adjustment, is suitable for various materials, does not need manual adjustment, and automatically controls the rotating speed of the driving piece according to the feeding weight so as to achieve the aim of accurate feeding.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of a preferred embodiment of the multi-channel high-precision powder dosing system of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a schematic structural view of fig. 1 with the dust-proof device removed.
Fig. 4 isbase:Sub>A sectional view in the directionbase:Sub>A-base:Sub>A of fig. 3.
Fig. 5 is a process flow diagram of a preferred embodiment of the multi-channel high precision powder dosing system of the present invention.
In the figure:
1. the frame is provided with a plurality of frame bodies,
2. a blanking mechanism is arranged on the feeding device,
21. bin 211, vertical escape surface 212, bin cover 2121, feed inlet 2122, dust suction inlet 2123, weight sensor 22, discharge unit 221, spiral discharge rod 222, first driving element 223, stirring element 2231, first stirring rod 2232, second stirring rod 224, second driving element 225, driving element mounting frame 226, driving bevel gear 227, mounting shaft sleeve 227, 228, driven bevel gear 23, material blocking unit 231, driving cylinder 232, connecting plate 233, cover turnover plate 233,
3. a multi-channel transmission mechanism, a 31U-shaped transmission frame, 32 transmission rollers, 33 separating pieces, 34 a transmission motor, 35 photoelectric proximity switches, 36 lifting cylinders, 37 front blocking pieces,
an XYZ motion mechanism, a 41. X-direction screw rod sliding block assembly, a 42. Y-direction screw rod sliding block assembly, a 43. Z-direction motion assembly, 431, a servo motor, 432, a driving gear, 433, a driven gear, 434, a screw rod, 435, a screw rod nut, 436. Z-direction mounting plates, 437, a motor mounting frame, 438, a guide rod assembly,
5. a weighing mechanism 51, an installation support plate 52, a jacking cylinder 53, a weighing sensor 54, a scale pan,
6. and a dust-proof device.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams each illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 to 4, a multi-channel high-precision powder quantitative feeding system comprises a frame 1, an automatic control system (not shown in the figures, which may be a PID adaptive control system, or other control system capable of realizing automatic control) arranged outside the frame 1, two discharging mechanisms 2, a multi-channel transmission mechanism 3, an XYZ movement mechanism 4, and two weighing mechanisms 5, wherein the two discharging mechanisms 2 are arranged on the top of the frame 1 side by side, electrically connected to the automatic control system, and each discharging mechanism 2 is controlled by the automatic control system to discharge materials vertically and downwardly; the multichannel transmission device 3 is located below the blanking device 2, and has two transmission channels, and is used for synchronously transmitting and receiving the container discharged by the blanking device 2, the XYZ motion mechanism 4 is connected below the multichannel transmission device 3, and drives the multichannel transmission device 3 to move in the X, Y, and Z directions, the two weighing devices 5 are connected at the top of the XYZ motion mechanism 4 side by side, the upper part of the weighing device 5 passes through the multichannel transmission device 3 to support and lift the container, so as to measure the weight of the material in the container, and the weighing device 5, the XYZ motion mechanism 4 and the multichannel transmission device 3 are also electrically connected with the automatic control system.
As shown in fig. 4, the blanking mechanisms 2 include a storage bin 21, a discharging unit 22 installed at the top of the storage bin 21, and a material blocking unit 23 arranged at the bottom of the storage bin 21, the upper parts of the storage bins 21 of the two blanking mechanisms 2 have vertical avoiding surfaces 211 (the distance between the two vertical avoiding surfaces 211 of the containers is about 15 mm), the discharging unit 22 includes a spiral discharging rod 221, a first driving member 222 for driving the spiral discharging rod 221 to rotate, a stirring member 223, and a second driving member 224 for driving the stirring member 223 to rotate, as shown in fig. 2, the material blocking unit 23 includes a driving cylinder 231, a connecting plate 232, and a flip plate 233, the output end of the driving cylinder 231 is connected with the connecting plate 232 which is obliquely arranged, and the lower end of the connecting plate 232 is connected with the flip plate 233.
As shown in fig. 1, the storage bin 21 is of a funnel-shaped structure, the top of the storage bin is connected with a bin cover 212, the bin cover 212 is provided with a feeding port 2121 and a dust suction port 2122, and three weight sensors 2123 are uniformly distributed on the outer wall of the storage bin 21. Referring to fig. 4, the top of the bin cover 212 is connected to a driving member mounting frame 225, the first driving member 222 and the second driving member 224 are respectively mounted on the top and the side wall of the driving member mounting frame 225, the output end of the first driving member 222 is connected to a spiral discharging rod 221, the lower end of the spiral discharging rod 221 penetrates through the bottom of the bin 21, the output end of the second driving member 224 is provided with a driving bevel gear 226, a mounting shaft sleeve 227 is arranged outside the spiral discharging rod 221, a driven bevel gear 228 engaged with the driving bevel gear 226 is fixed on the top of the mounting shaft sleeve 227, and a stirring member 223 is connected to the lower portion of the mounting shaft sleeve 227. The first driving element 222 and the second driving element 224 may be servo motors.
Specifically, the stirring members 223 include a first stirring rod 2231 and a second stirring rod 2232 respectively located on two sides of the spiral discharging rod 221, the first stirring rod 2231 and the second stirring rod 2232 are distributed in a staggered manner, the end portions of the first stirring rod 2231 and the second stirring rod 2232 are both L-shaped, the end portion extending direction of the first stirring rod 2231 intersects with the spiral discharging rod 221, and the end portion extending direction of the second stirring rod 2232 is away from the spiral discharging rod 221.
As shown in fig. 3, the multi-channel transmission mechanism 3 includes a U-shaped transmission frame 31, a plurality of transmission rollers 32, a partition 33 and a transmission motor 34 for driving the transmission rollers 32 to rotate, the plurality of transmission rollers 32 are transversely installed on the U-shaped transmission frame 31 side by side, the partition 33 is longitudinally installed on the transmission rollers 32 to form two transmission channels, a through hole for the weighing mechanism 5 to pass through is opened at the bottom of the U-shaped transmission frame 31, the transmission motor 34 is installed at one side of the U-shaped transmission frame 31, the U-shaped transmission frame 31 is provided with a photoelectric proximity switch 35, a lifting cylinder 36 is installed on the bottom plate of the U-shaped transmission frame 31, and a front blocking piece 37 is installed on the lifting cylinder 36. The forward stopper 37 is lifted by the lift cylinder 36 to block the front of the container (the front in the container conveying direction).
As shown in fig. 1, 2 and 4, the XYZ movement mechanism 4 includes an X-direction lead screw slider assembly 41, a Y-direction lead screw slider assembly 42 and a Z-direction movement assembly 43, the Y-direction lead screw slider assembly 42 is disposed on the X-direction lead screw slider assembly 41, the Z-direction movement assembly 43 is disposed on the Y-direction lead screw slider assembly 42, and includes a servo motor 431, a driving gear 432, a driven gear 433, a lead screw 434, a lead screw nut 435 and a Z-direction mounting plate 436, the servo motor 431 is vertically mounted on one side edge of the Z-direction mounting plate 436 through a motor mounting bracket 437, an output end thereof is connected with the driving gear 432, a lower end of the lead screw 434 penetrates through the Y-direction lead screw slider assembly 42, an upper end thereof penetrates through the Z-direction mounting plate 436 to be connected with the weighing mechanism 5, the lead screw 434 is sleeved with a lead screw nut 435 connected with the Z-direction mounting plate 436, a driven gear 433 in threaded connection with the lead screw 434 is fixed at the bottom of the lead screw nut 435, and the driven gear 433 is connected with the driving gear 432 through a timing belt; guide bar assemblies 438 connected to the U-shaped transport frame 31 are provided on both sides of the Z-mounting plate 436.
As shown in fig. 4, the weighing mechanism 5 includes a mounting support plate 51, a jacking cylinder 52, a load cell 53 and a scale pan 54, the jacking cylinder 52 is mounted on the mounting support plate 51, and a push rod thereof is connected with the scale pan 54, and the load cell 53 is arranged in the scale pan 54.
The multi-channel transmission mechanism 3 of the embodiment selects the optimal shaft diameter and the optimal parallel center distance through calculation and simulation, ensures the rigidity of the transmission roller 32 when the weight of the material is maximized, and only increases the width by thirty percent on the original basis to realize parallel transmission; the dust-proof device 6 is connected above the beams around the frame 1 and the XYZ motion mechanism 4, so that dust is prevented from being scattered on the XYZ motion mechanism 4.
At present, a screw rod and a screw rod of the quantitative feeding device are eccentrically arranged, the problem of processing a single container is solved, once two or more containers are processed, the overall lifting mechanism deviates to one side, so that the embodiment moves the containers to the middle, and other parts are adjusted correspondingly. The ground foot design optimization is consolidated, and ground foot position moves inwards, prevents that unit and unit from to the ground foot interference phenomenon in butt joint.
In addition, the number of each mechanism can be correspondingly increased within the allowable range of space according to the capacity requirement, so that the purpose of enlarging production is achieved.
As shown in fig. 5, the process flow of the multi-channel high-precision powder dosing system of the above embodiment is as follows: two different materials need to be fed into the two feeding mechanisms 2, and the specific gravity of the material fed into one feeding mechanism 2 is 0.7g/cm 3 The feeding amount is 900g/s, and the specific gravity of the material under the other feeding mechanism 2 is 1.6g/cm 3 The feeding amount is 400g/s; the two containers enter a multi-channel high-precision powder quantitative feeding system through an external transmission line, an automatic control system controls a conveying motor 34 to start, the two containers are synchronously transmitted, the containers reach a photoelectric proximity switch 35, the automatic control system controls the conveying motor 34 to stop, and simultaneously controls a lifting cylinder 36 to push out a push rod to drive a front blocking piece 37 to lift up to block the containers; the automatic control system controls the weighing sensor 53 to clear, then controls the jacking cylinder 52 to push out the push rod, the scale pan 54 rises to a set position, the jacking cylinder 52 stops acting, weight data of the empty container measured by the weighing sensor 53 is transmitted to the automatic control system, and the automatic control system controls the weighing sensor 53 to peel; the automatic control system controls the driving cylinder 231 of the material blocking unit 23 to act, the flip plate 233 is opened, and the multichannel transmission mechanism 3 is moved by the XYZ motion mechanism 4 to drive the container to move in a shape like a Chinese character 'hui' according to the charging time set by the automatic control system; the automatic control system respectively controls the driving parts of the blanking mechanism 2 to start, and weight data measured by the weighing sensor 53 is transmitted to the automatic control system every 50msComparing the dynamic control system with a preset value of the time point, calculating to obtain a deviation value delta 1, calculating to obtain a rotating speed corresponding to the deviation value delta 1 according to a formula of the blanking speed and time, and adjusting the rotating speed of the driving piece through the automatic control system; after the driving part adjusts the rotating speed, the automatic control system controls the weighing sensor 53 to measure the weight of the two containers at the time point, a difference value is formed by comparison, the difference value is compared with a preset comparison difference value at the time point, another deviation value delta 2 is obtained by calculation, the driving part corresponding to the weight data of one container is used as a reference, the rotating speed adjustment is carried out on the driving part corresponding to the weight data of the other container, so that the two blanking mechanisms 2 start blanking at the same time, and the blanking is completed at the same time (if more containers exist, the rotating speeds of the driving parts corresponding to the other containers are adjusted in sequence), and at the moment, the repose angles of the powder materials in the two containers are 45 degrees and 55 degrees respectively; after the two containers receive the materials, the automatic control system controls the weighing sensor 53 to measure the weight of each container after the blanking is finished, then the jacking cylinder 52 is controlled to retract the push rod, the scale pan 54 descends to a set position, and the jacking cylinder 52 stops acting; the automatic control system controls the conveying motor 34 to start, and simultaneously controls the lifting cylinder 36 to retract the push rod, so as to drive the front blocking piece 37 to descend, and synchronously convey the two containers to enter the next process.
In the process flow, the baiting of the two baiting mechanisms 2 can be independently set to target weights, materials with different weights and different material properties can be respectively filled, and the consistent time of the two containers can be ensured; for the quantitative feeding system with more blanking mechanisms 2, because the rotation speed adjustment is carried out at the set time, in order to further ensure that all the blanking mechanisms 2 can finish blanking at the set time, the fine adjustment operation of the driving part is carried out in the interval of adjacent set time, so as to realize the charging precision of each container to be +/-50 g, and even lower. In addition, three weight sensors 2123 are uniformly distributed on the outer wall of the stock bin 21, each stock bin 21 is weighed by three points, the material amount in the stock bin 21 is kept by adopting a decrement weighing mode, and the three weight sensors are matched with the lower weighing mechanism 5, so that smooth blanking is ensured, and no material blockage or material shortage is avoided; the charging precision is ensured.
The above-mentioned embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (4)
1. A feeding method of a multi-channel high-precision powder quantitative feeding system is characterized in that the multi-channel high-precision powder quantitative feeding system comprises the following steps:
frame (1) and the automatic control system who sets up outside frame (1), and:
the plurality of blanking mechanisms (2) are arranged at the top of the frame (1) side by side, are electrically connected with the automatic control system, and are controlled by the automatic control system to respectively discharge materials vertically downwards;
the multi-channel transmission mechanism (3) is positioned below the blanking mechanism (2), is provided with transmission channels with the same number as the blanking mechanism (2) and is used for synchronously transmitting and receiving the containers discharged by the blanking mechanism (2),
an XYZ movement mechanism (4) which is connected below the multi-channel transmission mechanism (3) and drives the multi-channel transmission mechanism (3) to move in the X direction, the Y direction and the Z direction,
a plurality of weighing mechanisms (5) which are connected with the top of the XYZ motion mechanism (4) side by side, the upper parts of the weighing mechanisms (5) pass through the multi-channel transmission mechanism (3) to support and lift the container so as to measure the weight of the materials in the container,
the weighing mechanism (5), the XYZ motion mechanism (4) and the multi-channel transmission mechanism (3) are also electrically connected with the automatic control system;
the blanking mechanism (2) comprises a storage bin (21), a discharging unit (22) installed at the top of the storage bin (21) and a material blocking unit (23) arranged at the bottom of the storage bin (21), wherein a vertical avoiding surface (211) is arranged at the upper part of the storage bin (21) of each adjacent blanking mechanism (2), the discharging unit (22) comprises a spiral discharging rod (221), a first driving piece (222) for driving the spiral discharging rod (221) to rotate, a stirring piece (223) and a second driving piece (224) for driving the stirring piece (223) to rotate, the material blocking unit (23) comprises a driving cylinder (231), a connecting plate (232) and a flip plate (233), the output end of the driving cylinder (231) is connected with the connecting plate (232) which is obliquely arranged, and the lower end of the connecting plate (232) is connected with the flip plate (233);
the storage bin (21) is of a funnel-shaped structure, the top of the storage bin is connected with a bin cover (212), a feeding hole (2121) and a dust suction hole (2122) are formed in the bin cover (212), and three weight sensors (2123) are uniformly distributed on the outer wall of the storage bin (21);
the top of the bin cover (212) is connected with a driving piece mounting frame (225), the first driving piece (222) and the second driving piece (224) are respectively mounted on the top and the side wall of the driving piece mounting frame (225), the output end of the first driving piece (222) is connected with a spiral discharging rod (221), the lower end of the spiral discharging rod (221) penetrates through the bottom of the bin (21), the output end of the second driving piece (224) is provided with a driving bevel gear (226), a mounting shaft sleeve (227) is arranged outside the spiral discharging rod (221), a driven bevel gear (228) meshed with the driving bevel gear (226) is fixed on the top of the mounting shaft sleeve (227), and the lower part of the mounting shaft sleeve (227) is connected with a stirring piece (223);
the stirring piece (223) comprises a first stirring rod (2231) and a second stirring rod (2232) which are respectively positioned on two sides of the spiral discharging rod (221), the first stirring rod (2231) and the second stirring rod (2232) are distributed in a staggered mode, the end parts of the first stirring rod (2231) and the second stirring rod (2232) are both L-shaped, the extending direction of the end part of the first stirring rod (2231) is intersected with the spiral discharging rod (221), and the extending direction of the end part of the second stirring rod (2232) is far away from the spiral discharging rod (221);
the multi-channel transmission mechanism (3) comprises a U-shaped transmission frame (31), a plurality of transmission rollers (32), a plurality of separators (33) and a transmission motor (34) for driving the transmission rollers (32) to rotate, the transmission rollers (32) are transversely installed on the U-shaped transmission frame (31) side by side, the separators (33) are longitudinally installed on the transmission rollers (32) to form a plurality of transmission channels, the bottom of the U-shaped transmission frame (31) is provided with a through hole for the weighing mechanism (5) to pass through, the transmission motor (34) is installed on one side of the U-shaped transmission frame (31), the U-shaped transmission frame (31) is provided with a photoelectric proximity switch (35), a lifting cylinder (36) is installed on the bottom plate of the U-shaped transmission frame (31), and a front stopper (37) is installed on the lifting cylinder (36);
the XYZ motion mechanism (4) comprises an X-direction lead screw slider assembly (41), a Y-direction lead screw slider assembly (42) and a Z-direction motion assembly (43), the Y-direction lead screw slider assembly (42) is arranged on the X-direction lead screw slider assembly (41), the Z-direction motion assembly (43) is arranged on the Y-direction lead screw slider assembly (42) and comprises a servo motor (431), a driving gear (432), a driven gear (433), a lead screw (434), a lead screw nut (435) and a Z-direction mounting plate (436), the servo motor (431) is vertically mounted on one side edge of the Z-direction mounting plate (436) through a motor mounting frame (437), the output end of the servo motor is connected with the driving gear (432), the lower end of the lead screw (434) penetrates through the Y-direction lead screw slider assembly (42), the upper end of the lead screw (434) penetrates through the Z-direction mounting plate (436) to be connected with the weighing mechanism (5), the lead screw nut (435) connected with the Z-direction mounting plate (436) in a sleeved mode, the driven gear (433) in threaded connection with the lead screw nut (434) is fixed at the bottom of the lead screw nut (435); guide rod assemblies (438) connected to the U-shaped transmission frame (31) are arranged on two sides of the Z-direction mounting plate (436);
the weighing mechanism (5) comprises a mounting support plate (51), a jacking cylinder (52), a weighing sensor (53) and a scale pan (54), wherein the jacking cylinder (52) is mounted on the mounting support plate (51), a push rod of the jacking cylinder is connected with the scale pan (54), and the weighing sensor (53) is arranged in the scale pan (54);
the feeding method comprises the following process steps:
s1: the automatic control system controls the conveying motor (34) to start, a plurality of containers are synchronously conveyed, the containers reach the photoelectric proximity switch (35), the automatic control system controls the conveying motor (34) to stop, and meanwhile, the lifting cylinder (36) is controlled to push out the push rod to drive the front blocking piece (37) to ascend to block the containers;
s2: the automatic control system controls the weighing sensor (53) to be reset, then controls the jacking cylinder (52) to push out the push rod, the scale pan (54) rises to a set position, the jacking cylinder (52) stops acting, weight data of the empty container measured by the weighing sensor (53) are transmitted to the automatic control system, and the automatic control system controls the weighing sensor (53) to peel;
s3: the automatic control system controls a driving cylinder (231) of the material blocking unit (23) to act, opens the turnover cover plate (233), and moves the multi-channel transmission mechanism (3) through the XYZ motion mechanism (4) to drive the container to move according to a specified route according to the charging time set by the automatic control system;
s4: the automatic control system respectively controls a driving piece of the blanking mechanism (2) to start, weight data measured by the weighing sensor (53) are transmitted to the automatic control system at regular intervals, the automatic control system is compared with a preset value at the time point to calculate a deviation value delta 1, then a rotating speed corresponding to the deviation value delta 1 is calculated according to a formula of blanking speed and time, and the rotating speed of the driving piece is adjusted through the automatic control system;
s5: after the driving part adjusts the rotating speed according to the step S4, the automatic control system controls the weighing sensor (53) to measure the weight of each container at the time point, two-by-two comparison is carried out to form a difference value, the difference value is compared with a preset two-by-two comparison difference value at the time point, another deviation value delta 2 is obtained through calculation, the weight data of one container in the minimum deviation value delta 2 is taken as a reference, the rotating speed of the driving part corresponding to the weight data of the other container is adjusted, then the rotating speeds of the driving parts corresponding to the other containers are sequentially adjusted, so that all the blanking mechanisms (2) start blanking at the same time, and blanking is completed at the same time;
s6: the automatic control system controls the weighing sensor (53) to measure the weight of each container after blanking is finished, then controls the jacking cylinder (52) to retract the push rod, the scale pan (54) descends to a set position, and the jacking cylinder (52) stops acting;
s7: the automatic control system controls the conveying motor (34) to start, and simultaneously controls the lifting cylinder (36) to retract the push rod, so as to drive the front blocking piece (37) to descend and synchronously convey a plurality of containers to enter the next working procedure.
2. The feeding method of the multi-channel high-precision powder quantitative feeding system according to claim 1, characterized in that: the time interval in the step S4 is 30-60 ms.
3. The feeding method of the multi-channel high-precision powder quantitative feeding system according to claim 1, characterized in that: the specific gravity of the powder material processed by the blanking mechanism (2) in the step S4 is 0.7-1.6 g/cm 3 The blanking weight of the blanking mechanism (2) is 400-900 g/s.
4. The feeding method of the multi-channel high-precision powder quantitative feeding system according to claim 1, characterized in that: and in the step S5, the repose angle of the powder material in the container after the blanking mechanism (2) finishes blanking is 42-60 degrees.
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