Pouring metering system based on a hoisting device and metering method thereof

Abstract

A kind of casting metering system based on hoisting device belongs to casting technical field, to solve the problem of casting ladle positioning difficult, weak digital management ability in casting pouring process, including first position, second position, third position and control unit, the first position, second position and third position are all equipped with position detection device, the position detection device is electrically connected with the control unit;The third position is arranged on the hoisting device, the first position and the second position are arranged outside the pouring area, and the horizontal distance between the first position and the second position from the edge of the pouring area is k, the distance between the first position and the second position is c.It is realized that hoisting device is accurately, quickly locked in the running position of pouring area, and the production efficiency and digital management ability of casting process are improved.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and in particular to a method for controlling processes in industrial production. Background Technology

[0002] Currently, for foundries using overhead cranes for casting, casting time is manually calculated by workers using stopwatches. The start button is pressed when casting begins, and the stopwatch is stopped when casting ends; the difference between the two is the casting time. The casting weight is recorded manually twice: once before casting and once after casting, and the difference is the final casting weight. This manual timing method is not only inaccurate but also requires subsequent data entry, increasing the workload and requiring dedicated personnel. Furthermore, it easily creates information silos, hindering the foundry's IT transformation. Summary of the Invention

[0003] In view of the problems in the existing technology that the casting operation cannot accurately measure the casting time and weight, and the problems of difficult positioning of the ladle and weak digital management capability in the casting process, a casting metering system and its metering method based on a hoisting device are proposed. The system can determine whether the casting crane is in the casting area by collecting data, thereby calculating the casting time and weight, thus improving the accuracy of the data acquisition of casting time and weight.

[0004] A casting metering system based on a hoisting device includes a first position, a second position, a third position, and a control unit. Each of the first, second, and third positions is equipped with a position detection device, which is electrically connected to the control unit to transmit data and information between them. The third position is located on the hoisting device. The first and second positions are located outside the casting area, with a horizontal distance of k between the first and second positions and the edge of the casting area, and a distance of c between the first and second positions. The specific position of the third position within the casting area is determined by the first and second positions, thus achieving the positioning purpose of the third position, which in turn achieves the positioning purpose of the hoisting device, to determine the specific position of the object hoisted by the hoisting device.

[0005] Preferably, the location detection device can be a UWB positioning base station, a laser location detector, or other distance measurement devices or instruments, used to measure the distance between the first location, the second location, and the third location.

[0006] Preferably, the hoisting device can be a crane, gantry robot, or other hoisting device that can span a certain area.

[0007] The beneficial effects of the technical solution of this invention are: it enables precise and rapid locking of the hoisting device's operating position in the casting area, thereby improving the production efficiency and digital management capabilities of the casting process. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the main view of a casting metering system based on a crane;

[0009] Figure 2 This is a top view schematic diagram of a casting metering system based on a crane;

[0010] Wherein, 1-first position; 2-second position; 3-third position; 4-traffic crane; 5-ladle; 6-casting area. Detailed Implementation

[0011] To more clearly illustrate the technical solution of the present invention, the technical solution of the invention will be described in detail with reference to the accompanying drawings. Obviously, the following description is some typical embodiments of the present invention. For those skilled in the art, other solutions can be obtained based on these embodiments without creative effort.

[0012] This implementation is based on the traditional overhead crane 4, and elaborates on the specific application of the invention in the casting process. Through the implementation of this technical solution, the position of the ladle 5 in the casting area 6 can be accurately located, and the casting time and weight can be accurately measured. In this implementation, the casting area 6 is rectangular, with the long side denoted as j and the short side denoted as i.

[0013] A casting metering system based on a traveling crane 4 includes a first position 1, a second position 2, a third position 3, and a control unit. Each of the first, second, and third positions 1 and 3 is equipped with a UWB positioning base station. The UWB positioning base station is electrically connected to the control unit to transmit the position information and related data of the first, second, and third positions 1 and 2 to the control unit. This allows the control unit to calculate the specific position of the third position 3 and provide the actual operating position, thus locating the third position 3. In this implementation, the third position 3 is located on the traveling crane 4, which is used to lift the ladle 5. Determining the specific position of the third position 3 is crucial for determining the exact location of the ladle 5 within the casting area 6, ensuring casting accuracy. In order to effectively utilize the first position 1 and the second position 2 to determine the positioning position of the third position 3 (i.e., the ladle 5 position), the first position 1 and the second position 2 are set relative to the casting area 6 according to the corresponding regulations. Specifically, the first position 1 and the second position 2 are set on the extension line of the long side of the rectangular casting area 6, and the horizontal distance between the first position 1 and the second position 2 and the edge of the casting area 6 is k, and the distance between the first position 1 and the second position 2 is c. In this implementation, the distance between the first position 1 and the second position 2 is equal to the length of the short side of the casting area 6, that is, c = i.

[0014] Specifically, the third position 3 set on the trolley 4 is in the same vertical plane as the hook of the trolley 4 and the center of gravity of the ladle 5 being lifted, so that the position of the ladle 5 can be positioned by positioning the third position 3, and the height of the third position 3 from the ground is H.

[0015] For ease of subsequent description, the casting area 6 is set in an XY two-dimensional coordinate system, where the X-axis is parallel to the long side of the casting area 6 and the Y-axis is parallel to the short side of the casting area 6, as shown below. Figure 2As shown, that is, the traveling crane 4 reciprocates in the Y-axis direction, and the third position 3 reciprocates in the X-axis direction, so as to realize the movement of the ladle 5 in the entire casting area 6. In the X-Y two-dimensional coordinate system, the first position 1 is taken as the origin of the X-Y two-dimensional coordinate system, the direction of the X-axis faces the casting area 6, and the direction of the Y-axis faces the second position 2. In the X-Y two-dimensional coordinate system, the first position 1, the second position 2, and the third position 3 form a triangle. The side length of the side where the second position 2 and the first position 1 are located is c. The side length of the side where the projections of the first position 1 and the third position 3 in the plane of the X-Y two-dimensional coordinate system are located is a. The side length of the side where the projection of the third position 3 in the plane of the X-Y two-dimensional coordinate system and the second position 2 are located is b. The angle of the angle where the first position 1 is located is the θ angle, and the angle of the angle where the second position 2 is located is the γ angle. From the vertex of the triangle corresponding to the projection point of the third position 3 in the plane of the X-Y two-dimensional coordinate system, a perpendicular line is drawn to the side where the first position 1 and the second position 2 are located. According to the trigonometric function relationship, the projection length of the side where the projections of the first position 1 and the third position 3 in the plane of the X-Y two-dimensional coordinate system are located on the X-axis is e = a*sinθ, and the projection length of the side where the projections of the first position 1 and the third position 3 in the plane of the X-Y two-dimensional coordinate system are located on the Y-axis is f = a*cosθ; the projection length of the side where the projection of the third position 3 in the plane of the X-Y two-dimensional coordinate system and the second position 2 are located on the X-axis is g = b*sinγ, and the projection length of the side where the projection of the third position 3 in the plane of the X-Y two-dimensional coordinate system and the second position 2 are located on the Y-axis is h = b*cosγ.

[0016] In this implementation manner, a casting metering method based on a hoisting device includes how to position the third position 3. Specifically, the method for positioning the third position 3 includes:

[0017] 1) Determine whether the position (e, f) of the third position 3 relative to the first position 1 in the X-Y two-dimensional coordinate system satisfies 0 < f < i and k < e < j + k. If it meets the requirements, proceed to the next step; otherwise, the control unit issues a traveling instruction to the traveling crane 4 based on the feedback position data of (e, f) to adjust the actual position of the third position 3;

[0018] 2) Determine whether the position (g, h) of the third position 3 relative to the second position 2 in the X-Y two-dimensional coordinate system satisfies 0 < h < i and k < g < j + k. If it meets the requirements, proceed to the next step; otherwise, the control unit issues a traveling instruction to the traveling crane 4 based on the feedback position data of (g, h) to adjust the actual position of the third position 3;

[0019] 3) The control unit issues a command to enter the casting area 6 at the third position 3 (that is, the ladle 5 enters the casting area 6), and issues a command to stop the crane 4.

[0020] As a supplement to this implementation, the metering method of the casting metering system based on the crane 4 includes:

[0021] 1) After the third position 3 is determined, and after the holding time set by the control unit, the control unit reads the weight of the ladle 5;

[0022] 2) At the start of casting, record the start time of casting, the end time of casting, the weight of the ladle at the start time of casting, and the weight of ladle 5 at the end time of casting.

[0023] 3) Calculate the casting time and casting weight. Specifically, the casting time = the end time of casting - the start time of casting, and the casting weight = the weight of ladle 5 at the start time of casting - the weight of ladle 5 at the end time of casting.

[0024] As another supplement to this implementation, the control unit reads the weight of the ladle 5 by continuously reading and comparing the current weight of the ladle 5 with the previous weight at a certain frequency, thereby determining whether casting has started. While reading the weight of the ladle 5 each time, the time at which the corresponding weight is reached is also recorded, which facilitates monitoring the flow rate of the molten metal during the casting process.

[0025] As an extension of this technical solution, a plurality of hoisting devices are provided in the casting area 6, and each hoisting device is provided with a corresponding third position 3, that is, there are a plurality of third positions 3. The positioning of the plurality of third positions 3 in the casting area 6 follows the set operating sequence or operating level of the plurality of hoisting devices, and the positioning method of the third positions 3 is used in sequence to determine whether the plurality of third positions 3 are in the required casting position, thereby achieving the purpose of simultaneously casting a plurality of castings or core packages.

[0026] The above embodiments are merely descriptions of a typical application of the technical solution of the present invention. Reasonable extensions can be made without requiring creative effort.

Claims

1. A casting metering method based on a hoisting device, employing a casting metering system based on a hoisting device, the system comprising a first position, a second position, a third position, and a control unit, wherein each of the first, second, and third positions is equipped with a position detection device, the position detection device being electrically connected to the control unit for data and information transmission between them; the third position is located on the hoisting device, the first and second positions are located on the extension line of the long side of a rectangular casting area, the long side of the casting area having length j and the short side having length i, and the horizontal distance between the first and second positions and the edge of the casting area being k, the distance between the first and second positions being c, the distance c between the first and second positions being equal to the short side length i of the casting area; the position detection device is a UWB positioning base station or a laser position detector, used to measure the distance between the first and third positions and the distance between the second and third positions; the hoisting device is an overhead crane; characterized in that... Positioning method including the third position: Determine whether the position (e, f) of the third position relative to the first position in the X-Y two-dimensional coordinate system satisfies 0 < f < i and k < e < j + k. If it meets the conditions, proceed to the next step; otherwise, the control unit issues a travel command to the traveling crane based on the feedback position data of (e, f) to adjust the actual position of the third position; Determine whether the position (g, h) of the third position relative to the second position in the X-Y two-dimensional coordinate system satisfies 0 < h < i and k < g < j + k. If it meets the conditions, proceed to the next step; otherwise, the control unit issues a travel command to the traveling crane based on the feedback position data of (g, h) to adjust the actual position of the third position; The control unit issues an instruction for the third position to enter the determined casting area and issues an instruction for the traveling crane to stop running.

2. The casting metering method based on a hoisting device as described in claim 1, characterized in that, A number of the lifting devices are provided, and the third position is arranged on each of the lifting devices.

3. The casting metering method based on a hoisting device as described in claim 1, characterized in that, It further includes that after the third position is determined and after the holding time set by the control unit, the control unit reads the weight of the ladle; At the start of casting, record the start time of casting, the end time of casting, the weight of the ladle at the start time point of casting, and the weight of the ladle at the end time point of casting; [[ID=VII]]Calculate the casting time and the casting weight.

4. The casting metering method based on a hoisting device as described in claim 3, characterized in that, The method for the control unit to read the weight of the ladle includes continuously reading and comparing the weight of the current ladle and the weight of the ladle read in the previous time at a certain frequency; If the difference between the weight of the ladle in the previous time and the weight of the current ladle exceeds the range set by the control unit, it is determined that casting has started; otherwise, casting has not started.

5. The casting metering method based on a hoisting device as described in claim 4, characterized in that, The method for the control unit to read the weight of the ladle further includes recording the time at the corresponding weight while reading the weight data of the ladle each time.

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