阅读说明：本技术 一种自动称重装置 (Automatic weighing device ) 是由 张传申 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种自动称重装置,包括：柜体、第一丝杆轴、第一伺服电机、第一丝杆支撑座、第一丝杆螺母、物料托板、称重传感器、第二丝杆轴、第二伺服电机、第二丝杆支撑座、第二丝杆螺母、下料机构和控制系统。通过上述结构,本发明通过控制系统控制第一伺服电机驱动第一丝杆机构带动称重机构和物料托板进行接料称重,称重完成后由控制系统驱动控制第二伺服电机驱动第二丝杆机构带动下料机构进行下料,避免了传动机构对称重机构的影响,使称重传感器能够稳定可靠的工作,获得稳定的称重值。(The invention discloses an automatic weighing device, comprising: the feeding device comprises a cabinet body, a first screw rod shaft, a first servo motor, a first screw rod supporting seat, a first screw rod nut, a material supporting plate, a weighing sensor, a second screw rod shaft, a second servo motor, a second screw rod supporting seat, a second screw rod nut, a feeding mechanism and a control system. Through the structure, the control system controls the first servo motor to drive the first screw rod mechanism to drive the weighing mechanism and the material supporting plate to carry out material receiving and weighing, and the control system drives the second servo motor to drive the second screw rod mechanism to drive the blanking mechanism to carry out blanking after the weighing is finished, so that the influence of the transmission mechanism on the weighing mechanism is avoided, the weighing sensor can stably and reliably work, and a stable weighing value is obtained.)

1. An automatic weighing device, comprising: the feeding device comprises a cabinet body, a first screw rod shaft, a first servo motor, a first screw rod supporting seat, a first screw rod nut, a material supporting plate, a weighing sensor, a second screw rod shaft, a second servo motor, a second screw rod supporting seat, a second screw rod nut, a feeding mechanism and a control system;

the first screw rod shaft is in rolling fit with the first screw rod supporting seat screw rod, the first screw rod supporting seat is fixed in the middle of the table top of the cabinet body through a bolt, and the first servo motor is horizontally fixed with the left end bolt of the first screw rod shaft;

the lower end face of the weighing sensor is fixed on the first screw rod nut by using a bolt, and the upper end face of the weighing sensor is fixed with the bottom of the material tray by using a bolt;

the second screw rod shaft is in rolling fit with the second screw rod through the second screw rod supporting seat, the second screw rod supporting seat is fixed on the outer side of the table board of the cabinet body through a bolt, the second servo motor is horizontally fixed with a left end bolt of the second screw rod shaft, and the lower end of the blanking mechanism is fixed with the second screw rod bolt;

the control system includes: PLC controller, first servo controller, second servo controller, HMI touch-sensitive screen and control button, the PLC controller respectively with first servo controller, HMI touch-sensitive screen, weighing sensor and control button electric connection, first servo controller passes through power cable and is connected with first servo motor, the second servo controller passes through power cable and is connected with the second servo motor.

2. The automatic weighing apparatus of claim 1, wherein the load cell is an S-shaped load cell.

3. The automatic weighing device of claim 1 or 2, wherein the weighing range of the load cell is 0.2 ~ 10 Kg.

4. The automatic weighing apparatus of claim 1, wherein the PLC controller is siemens S7-1200.

5. The automatic weighing device of claim 1 or 4, wherein the control system further comprises a material infrared sensor electrically connected to the PLC controller.

6. The automatic weighing device of claim 1, wherein the control system further comprises an audible and visual alarm, the audible and visual alarm being electrically connected to the PLC controller.

Technical Field

The invention relates to the field of automation equipment, in particular to an automatic weighing device.

Background

With the development of advanced science and technology of society, the industrial automation level is continuously improved, and different links of production are gradually replaced by automatic equipment through manual operation. The weighing link of product in automation equipment involves the batching of material, the packing of product to and the quality testing of product etc. automatic weighing device links up in automatic assembly line among the prior art mostly, mainly adopts to set up drum-type or crawler-type drive mechanism on weighing system and carries out weighing and circulation of material. In the mode, the power mechanism is loaded on the weighing system, and in the working process, the zero point of the weighing system drifts due to the factors such as vibration, impact and the like caused by the motion of the power mechanism, so that the weighing result is inaccurate.

Disclosure of Invention

The invention mainly solves the technical problem of providing an automatic weighing device which can realize stable and reliable weighing operation through a weighing mechanism to obtain an effective weighing result.

In order to solve the technical problems, the invention adopts a technical scheme that: there is provided an automatic weighing apparatus comprising: the feeding device comprises a cabinet body, a first screw rod shaft, a first servo motor, a first screw rod supporting seat, a first screw rod nut, a material supporting plate, a weighing sensor, a second screw rod shaft, a second servo motor, a second screw rod supporting seat, a second screw rod nut, a feeding mechanism and a control system;

the first screw rod shaft is in rolling fit with the first screw rod supporting seat screw rod, the first screw rod supporting seat is fixed in the middle of the table top of the cabinet body through a bolt, and the first servo motor is horizontally fixed with the left end bolt of the first screw rod shaft; the lower end face of the weighing sensor is fixed on the first screw rod nut by using a bolt, and the upper end face of the weighing sensor is fixed with the bottom of the material tray by using a bolt;

the second screw rod shaft is in rolling fit with the second screw rod through the second screw rod supporting seat, the second screw rod supporting seat is fixed on the outer side of the table board of the cabinet body through a bolt, the second servo motor is horizontally fixed with a left end bolt of the second screw rod shaft, and the lower end of the blanking mechanism is fixed with the second screw rod bolt;

the control system includes: PLC controller, first servo controller, second servo controller, HMI touch-sensitive screen and control button, the PLC controller respectively with first servo controller, HMI touch-sensitive screen, weighing sensor and control button electric connection, first servo controller passes through power cable and is connected with first servo motor, the second servo controller passes through power cable and is connected with the second servo motor.

In a preferred embodiment of the present invention, the load cell is an S-shaped load cell.

In a preferred embodiment of the invention, the weighing range of the weighing sensor is 0.2 ~ 10 Kg.

In a preferred embodiment of the present invention, the PLC controller is Siemens S7-1200.

In a preferred embodiment of the present invention, the control system further includes a material infrared sensor, and the material infrared sensor is electrically connected to the PLC controller.

In a preferred embodiment of the present invention, the control system further includes an audible and visual alarm, and the audible and visual alarm is electrically connected to the PLC controller.

The invention has the beneficial effects that: according to the invention, the control system controls the first servo motor to drive the first screw rod mechanism to drive the weighing mechanism and the material supporting plate to carry out material receiving and weighing, and the control system drives the second servo motor to drive the second screw rod mechanism to drive the blanking mechanism to carry out blanking after the weighing is finished, so that the influence of the transmission mechanism on the weighing mechanism is avoided, the weighing sensor can stably and reliably work, and a stable weighing value is obtained.

Drawings

FIG. 1 is a schematic view of a weighing mechanism of a preferred embodiment of the automatic weighing apparatus of the present invention;

FIG. 2 is a left side view of the automatic weighing apparatus of the present invention;

FIG. 3 is a schematic view of a discharging mechanism of a preferred embodiment of the automatic weighing apparatus of the present invention;

the parts in the drawings are numbered as follows: 1-a cabinet body, 2-a first screw shaft, 3-a first servo motor, 4-a first screw support seat, 5-a first screw nut, 6-a material tray, 7-a weighing sensor, 8-a left limit position of a blanking mechanism, 9-a blanking baffle, 10-a right limit position of the blanking mechanism, 11-a material infrared sensor and 12-an HMI touch screen, 13-control button, 14-audible and visual alarm, 15-feeding trough of the previous process, 16-receiving conveyor belt of the next process, 17-PLC controller, 18-first servo controller, 19-second servo controller, 20-second servo motor, 21-second screw shaft, 22-second screw support seat, 23-second screw nut and 24-feeding mechanism.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the present invention includes:

an automatic weighing apparatus comprising: the feeding device comprises a cabinet body 1, a first screw shaft 2, a first servo motor 3, a first screw support seat 4, a first screw nut 5, a material supporting plate 6, a weighing sensor 7, a second screw shaft 21, a second servo motor 20, a second screw support seat 22, a second screw nut 23, a discharging mechanism 24 and a control system.

Further explaining the working principle of the automatic weighing device: the automatic weighing system is a device used for a weighing process in automatic equipment, and the invention realizes the process of material receiving of the material tray 6 and material discharging of the material discharging mechanism 23 by utilizing a servo system to drive a screw rod mechanism. The screw mechanism mainly comprises two mechanisms, namely a first screw shaft mechanism and a second screw shaft mechanism, wherein the two mechanisms are respectively fixed on the table top of the cabinet body 1 through a first screw supporting seat 4 and a second screw host seat 22. The first screw shaft mechanism is controlled by a PLC (programmable logic controller) controller 17 to control a first servo controller 18 to drive a first servo motor 3 to drive a first screw shaft 2 to move, so that a first screw nut 5, a weighing sensor 7 fixed on the first screw nut and a material supporting plate 6 are driven to move left and right stably, and the functions of receiving and weighing the material supporting plate 6 are mainly realized. The second screw shaft mechanism is controlled by a PLC (programmable logic controller) 17 to drive a second servo controller 19 to drive a second servo motor 20 to drive a second screw shaft 21 to move, so that a second screw nut 23 and a blanking mechanism 24 fixed on the second screw nut 23 are driven to move left and right stably, and blanking action after weighing is finished is mainly realized.

The original state of each mechanism of the device before weighing is that the material tray 6 and the blanking mechanism 24 are both stopped at the leftmost side of the screw rod mechanism, when the previous procedure is performed, the material feeding groove 15 feeds materials to the material supporting plate 6 through the previous procedure, through the driving mode, the material supporting plate 6 moves from left to right to receive the materials from the material feeding groove 15, when the material tray 6 moves to the position of 3/4, the previous procedure stops feeding materials, at the moment, whether the materials stay in the material feeding groove 15 or not is detected by the material infrared sensor, and if the materials stay in the material feeding groove 15, the material tray 6 continues to move right until the last material falls into the material tray 6. At the moment, the weighing system starts a weighing function, the S-shaped weighing sensor 7 transmits data to the PLC 17, and the data are transmitted to the HMI touch screen 12 to be displayed and accumulated through analysis of the PLC 17. The S-shaped weighing sensor is selected mainly because the S-shaped weighing sensor is suitable for specified standard weighing, such as a platform scale, a hopper weighing system and the like, and is particularly suitable for some industrial weighing systems requiring high precision. Because of its high reliability and sealed design, it can work continuously and stably for a long time even in a severe environment.

After weighing is finished, the blanking mechanism 24 pushes the materials on the material tray 6 to a material receiving conveyor belt of a next procedure from the left limit position 8 of the blanking mechanism from left to right in the driving mode through the blanking baffle 9, and the materials enter a next procedure analysis processing. When the blanking mechanism 24 reaches the blanking mechanism right limit position 10, the material tray 6 and the blanking mechanism 24 are simultaneously moved to the left side by the aforementioned driving method. And after the left position is reached, the previous working procedure continues to feed, the material head disc 6 is fed from the blanking groove 15, and the continuous weighing operation is completed in such a circulating way.

The PLC controller 17 of the control system adopts Siemens S7-1200 series, which is the latest Siemens PLC controller and has the advantages of high running speed, stable hardware and good servo control capability. In addition, the control system can start, stop, adjust and the like the weighing device through a control button 13 arranged on the panel, and also comprises an audible and visual alarm 14 which is used for driving the audible and visual alarm 14 to give out audible and visual alarm to remind workers when the device breaks down.

The weighing capacity of the whole weighing system is determined by the S-shaped weighing sensor 7, and the weighing range of the weighing sensor selected in the invention is 0.2 ~ 10Kg, so that the weighing system can be suitable for weighing operation of different products produced on an automatic production line.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.