A charging device for metal powder

Abstract

This utility model discloses a precision feeding device for metal powder, relating to the field of automatic feeding technology in powder metallurgy. The device consists of a feeding assembly, a weighing assembly, a detection assembly, and a host computer assembly. In the feeding assembly, a feeding pipe, a hopper, a vibrating motor, a feeding bucket, and a sieve box driven by an electromagnetic vibrating feeder are sequentially installed on the frame. The weighing assembly includes a support frame fixed to a large base plate, a weighing sensor, a weighing hopper, and an opening and closing mechanism controlled by a cylinder. It feeds the powder into the mold cavity through a material distributor and a conveying module. The detection assembly uses a detection element to detect the actual weight of the mold cavity online and feeds it back to the host computer assembly. The device controls the feeding error within ±0.2g through a closed-loop weighing-re-weighing-compensation mechanism and can automatically warn of early mold wear, significantly improving the consistency, pass rate, and production cleanliness of powder metallurgy blanks.

Description

Technical Field

[0001] This utility model relates to a feeding device for metal powder, belonging to the field of powder feeding control technology. Background Technology

[0002] In powder metallurgy, the process of adding metal or non-metal powders into a mold cavity for blank forming used to be done manually. However, manual feeding makes it impossible to accurately control the amount of powder added to the mold cavity. With the development of automation technology, automatic feeding has become the main technical means. The powder is sent to the weighing component through the feeding mechanism, and finally sent to the mold cavity through the feeding mechanism. The material is weighed at the weighing component and then falls into the material distributor. However, due to the influence of environmental factors on the powder, it is impossible to determine whether the weight of the material falling into the mold cavity is the weight required for mold forming. In addition, the mold is prone to wear during use. Currently, it mainly relies on manual experience to judge, which is often lagging. By the time it is discovered, the mold is already severely worn, affecting the forming effect. Utility Model Content

[0003] This invention overcomes the shortcomings of the existing technology and provides a feeding device for metal powder, which automatically warns of early mold wear and significantly improves the consistency, pass rate and cleanliness of powder metallurgy compacts.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a feeding device for metal powder, comprising: a feeding assembly; the feeding assembly includes a frame, a feeding pipe fixed on the frame, a hopper fixed on the upper end of the feeding pipe, a vibrating motor fixed on the side wall of the feeding pipe, a feeding hopper fixed on the lower end of the feeding pipe, and an electromagnetic vibrating feeder fixed on the lower plate, wherein a sieve box is fixed on the electromagnetic vibrating feeder, and the lower plate is adjustablely fixed on the frame by a screw;

[0005] Weighing assembly; the weighing assembly includes a large base plate fixed to the frame, a support frame fixed to the large base plate, a weighing sensor fixed to the support frame, a weighing hopper fixed to the weighing sensor, an opening and closing mechanism fixed to the lower end of the weighing hopper, and a cylinder with one end fixed to the weighing hopper and the other end connected to the opening and closing mechanism.

[0006] The detection assembly includes a detection bracket fixed to a base plate and a detection element fixed to the detection bracket, the detection element being used to detect the weight of the material inside the mold.

[0007] The host computer component is communicatively connected to the vibrating motor, electromagnetic vibrating feeder, weighing sensor, cylinder, and detection element, and is used to receive and process weight data and detection data, and control the operation of each component.

[0008] Furthermore, the feeding pipe has a flange structure and is fixedly connected to the frame by screws, and the vibration motor is fixedly connected to the side wall of the feeding pipe by a fixing plate and bolts.

[0009] Furthermore, the electromagnetic vibrating feeder is adjustablely fixed to the lower plate via a fixed plate and a screw, and an elastic buffer pad is provided between the screen box and the electromagnetic vibrating feeder.

[0010] Furthermore, the weighing assembly also includes a material distributor and a conveying module. The material distributor is fixed to the conveying module and is used to uniformly convey the powder in the weighing hopper to the mold cavity.

[0011] Furthermore, the conveying module is a linear module driven by a servo motor, the material feeder is a vibrating material feeder, and the outlet position of the material feeder corresponds to the position of the mold cavity.

[0012] Furthermore, the detection element is a weighing sensor, used to detect changes in the weight of the mold in real time and transmit the detection data to the host computer component in real time.

[0013] Furthermore, the host computer component includes an electrical control cabinet, a PLC controller, a human-machine interface, and a data storage module. The PLC controller is used to receive data from the weighing sensor and detection element in real time and compare it with a preset threshold to control the operation of the vibrating motor, the electromagnetic vibrating feeder, and the cylinder.

[0014] Furthermore, the host computer component also includes an alarm module. When the mold weight data detected by the detection element exceeds a preset threshold range, the alarm module issues an audible and visual alarm signal and automatically cuts off the power supply to the vibration motor and the electromagnetic vibrating feeder.

[0015] Furthermore, the feeding device also includes a dust cover, which covers the outside of the silo, feeding pipe, feeding hopper, screening box and weighing hopper to prevent powder from leaking out and polluting the environment.

[0016] Compared with the prior art, the advantages of this utility model are as follows: This utility model, through closed-loop control of the electromagnetic vibration feeder and weighing sensor, can control the single-piece feeding error of metal powder within ±0.2g, meeting the high-precision forming requirements of powder metallurgy; by using detection elements to re-weigh the actual weight of the mold cavity in real time and comparing it with the data from the weighing hopper, it automatically compensates for deviations, preventing batch quality fluctuations caused by powder adhesion or mold wear; this utility model completely encloses the hopper, feeding pipe, and weighing hopper with an overall dust cover, improving the workshop environment; and by integrating data storage and trend analysis through the upper computer component, it can provide early warning before the mold's lifespan reaches its limit, reducing downtime and scrap rates, and effectively lowering overall production costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the feeding component and the weighing component in this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 5 This is a schematic diagram of the feeding component in this utility model.

[0023] Figure 6 This is a schematic diagram of the weighing component in this utility model.

[0024] Figure 7 This is a schematic diagram of the detection component in this utility model.

[0025] In the diagram: 1 is the feeding assembly, 101 is the frame, 102 is the feeding pipe, 103 is the vibrating motor, 104 is the hopper, 105 is the feeding bucket, 106 is the screening box, 107 is the electromagnetic vibrating feeder, 108 is the lower plate, 109 is the screw, 2 is the weighing assembly, 201 is the base plate, 202 is the support frame, 203 is the weighing sensor, 204 is the weighing hopper, 205 is the opening and closing mechanism, 206 is the cylinder, 207 is the material distributor, 208 is the conveying module, 3 is the detection assembly, 301 is the detection element, 302 is the detection bracket, and 4 is the host computer assembly. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments.

[0027] like Figures 1 to 7 As shown, this utility model discloses a feeding device for metal powder, comprising: a feeding assembly 1; the feeding assembly 1 includes a frame 101, a feeding pipe 102 fixed on the frame 101, a hopper 104 fixed on the upper end of the feeding pipe 102, a vibrating motor 103 fixed on the side wall of the feeding pipe 102, a feeding hopper 105 fixed on the lower end of the feeding pipe 102, and an electromagnetic vibrating feeder 107 fixed on a lower plate 108, wherein a sieve box 106 is fixed on the electromagnetic vibrating feeder 107, and the lower plate 108 is adjustablely fixed on the frame 101 by a screw 109;

[0028] In this embodiment, the feeding pipe 102 is a flange structure and is fixedly connected to the frame 101 by screws. The vibration motor 103 is fixedly connected to the side wall of the feeding pipe 102 by a fixing plate and bolts.

[0029] In this embodiment, the electromagnetic vibrating feeder 107 is tunably fixed to the lower plate 108 via a fixing plate and a screw, and an elastic buffer pad is provided between the screen box 106 and the electromagnetic vibrating feeder 107.

[0030] Weighing assembly 2; the weighing assembly 2 includes a large base plate 201 fixed to the frame 101, a support frame 202 fixed to the large base plate 201, a weighing sensor 203 fixed to the support frame 202, a weighing hopper 204 fixed to the weighing sensor 203, an opening and closing mechanism 205 fixed to the lower end of the weighing hopper 204, and a cylinder 206 with one end fixed to the weighing hopper 204 and the other end connected to the opening and closing mechanism 205;

[0031] In this embodiment, the weighing component 2 further includes a material distributor 207 and a conveying module 208. The material distributor 207 is fixed on the conveying module 208 and is used to uniformly convey the powder in the weighing hopper 204 to the mold cavity.

[0032] In this embodiment, the conveying module 208 is a linear module driven by a servo motor, the material feeder 207 is a vibrating material feeder, and the outlet position of the material feeder 207 corresponds to the position of the mold cavity.

[0033] Detection component 3; The detection component 3 includes a detection bracket 302 fixed on the base plate 201 and a detection element 301 fixed on the detection bracket 302, the detection element 301 being used to detect the weight of the material inside the mold;

[0034] In this embodiment, the detection element 301 is a weighing sensor, which is used to detect changes in the weight of the mold in real time and transmit the detection data to the host computer component 4 in real time.

[0035] The host computer component 4 is communicatively connected to the vibrating motor 103, the electromagnetic vibrating feeder 107, the weighing sensor 203, the cylinder 206, and the detection element 301, respectively, and is used to receive and process weight data and detection data, and control the operation of each component.

[0036] In this embodiment, the host computer component 4 includes an electrical control cabinet, a PLC controller, a human-machine interface, and a data storage module. The PLC controller is used to receive data from the weighing sensor 203 and the detection element 301 in real time and compare it with a preset threshold to control the operation of the vibrating motor 103, the electromagnetic vibrating feeder 107, and the cylinder 206.

[0037] In this embodiment, the host computer component 4 also includes an alarm module. When the mold weight data detected by the detection element 301 exceeds the preset threshold range, the alarm module issues an audible and visual alarm signal and automatically cuts off the power supply to the vibration motor 103 and the electromagnetic vibration feeder 107.

[0038] In this embodiment, the feeding device further includes a dust cover, which covers the outside of the silo 104, the discharge pipe 102, the discharge hopper 105, the sieve box 106 and the weighing hopper 204 to prevent powder from leaking out and polluting the environment.

[0039] The working principle of this utility model:

[0040] I. Preparation Stage;

[0041] a. The dust cover has completely sealed the hopper 104, the discharge pipe 102, the discharge hopper 105, the screen box 106 and the weighing hopper 204.

[0042] b. The operator inputs the target unit weight, allowable error range, and alarm threshold through the human-machine interface of the host computer component 4; the data storage module saves the batch formula.

[0043] c. The PLC controller self-checks the communication status of the vibration motor 103, electromagnetic vibratory feeder 107, weighing sensor 203, cylinder 206 and detection element 301.

[0044] II. Material feeding stage;

[0045] a. The PLC simultaneously starts the vibratory motor 103 and the electromagnetic vibratory feeder 107.

[0046] The vibration motor 103 is fixed to the side wall of the feeding pipe 102 and uses the flange structure to transmit vibration, thereby breaking the powder arch bridge.

[0047] The electromagnetic vibrating feeder 107 is fixed to the lower plate 108 by an adjustable screw 109, and its amplitude is adjustable. An elastic buffer pad is provided between the screen box 106 and the electromagnetic vibrating feeder 107 to avoid damage from metal powder impact. The electromagnetic vibrating feeder 107 achieves dual-speed feeding by changing the coil current frequency and duty cycle, that is, it first feeds rapidly with an amplitude of 80-100%, and then automatically switches to a fine feeding mode with an amplitude of 5-20% when the target value of 90% is reached.

[0048] b. The metal powder is vibrated by the sieve box 106 to break up the agglomerated material blocks, and then enters the weighing hopper 204 in a continuous flow.

[0049] III. Weighing stage;

[0050] a. Weighing sensor 203 collects instantaneous weight at millisecond intervals, and the PLC performs a moving average filter to obtain the real-time weight W.f .

[0051] b. PLC will W f Compare with the preset target value W0: When W f When entering the W0±ΔW range, the PLC immediately shuts down the electromagnetic vibratory feeder 107 and the vibratory motor 103, achieving precise feeding in three stages: "fast-slow-stop".

[0052] IV. Material feeding stage;

[0053] a. The PLC controls the cylinder 206 to operate, driving the opening and closing mechanism 205 to open, so that the metal powder in the weighing hopper 204 falls into the material distributor 207 in one go.

[0054] b. The servo motor driven conveying module 208 quickly moves the vibrating material feeder 207 directly above the mold cavity; the material feeder 207 uses high-frequency micro-vibration to make the powder fill the mold cavity evenly, and scrapes the material in the mold cavity flat through the plane at the bottom of the hopper.

[0055] V. Mold Cavity Verification Stage;

[0056] a. The detection element 301 is an independent weighing sensor that directly measures the total weight of the powder-containing mold.

[0057] b. PLC calculates the actual powder weight in the mold cavity. .

[0058] c. Data is transmitted back to the host computer component 4 in real time via the communication bus.

[0059] VI. Closed-loop compensation stage;

[0060] a. PLC comparison W m With W f :like If the condition is deemed acceptable, the compressor may be started; if... If the deviation is recorded automatically, the amplitude or time of the electromagnetic feeder 107 can be adjusted in the next cycle to compensate for the deviation.

[0061] b. All weight data is archived by the data storage module for SPC analysis and mold life prediction.

[0062] VII. Alarm / Shutdown Phase;

[0063] When the weight data of the detection element 301 exceeds the preset threshold range N times consecutively, where N is set according to the product qualification rate requirement:

[0064] a. The alarm module emits an audible and visual alarm;

[0065] b. The PLC immediately cuts off the power to the vibrating motor 103 and the electromagnetic vibrating feeder 107, and the feeding device enters a safe shutdown state, waiting for manual intervention.

[0066] This invention addresses the problem that traditional manual or single weighing methods are affected by powder flowability, environmental humidity, and bridging effect, resulting in a single weight error of more than ±1g, leading to uneven compact density and out-of-tolerance dimensions. This invention uses an electromagnetic vibrating feeder 107, a weighing sensor 203, and closed-loop compensation to reduce the error to ±0.2g, meeting the requirements of high-precision powder metallurgy.

[0067] The weight measured by the weighing hopper 204 does not represent the final weight entering the mold cavity. Powder sticking to the wall, scattering, or slight deformation of the mold can all cause hidden deviations. This utility model adds a detection element 301 at the mold cavity position to perform secondary verification of the weighing results, realizing a double closed loop of "weighing-reweighing" to ensure that the true powder weight of each pressed blank is qualified. Compared with the traditional method of relying on "equal volume" powder feeding to ensure the quality of the molded product, weight is a better guarantee for the quality of the molded product.

[0068] Existing technologies rely on manual sampling, which often leads to the discovery of mold wear only after a large number of defective products have been produced. This invention provides early warning of the end of mold life by continuously monitoring changes in mold cavity weight or height, thereby reducing the scrap rate and minimizing unplanned downtime.

[0069] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A feeding device for metal powder, characterized in that, include: The feeding assembly (1) includes a frame (101), a feeding pipe (102) fixed on the frame (101), a hopper (104) fixed on the upper end of the feeding pipe (102), a vibrating motor (103) fixed on the side wall of the feeding pipe (102), a feeding hopper (105) fixed on the lower end of the feeding pipe (102), and an electromagnetic vibrating feeder (107) fixed on the lower plate (108). A screen box (106) is fixed on the electromagnetic vibrating feeder (107), and the lower plate (108) is adjustablely fixed on the frame (101) by a screw (109). Weighing assembly (2); The weighing assembly (2) includes a base plate (201) fixed to the frame (101), a support frame (202) fixed to the base plate (201), a weighing sensor (203) fixed to the support frame (202), a weighing hopper (204) fixed to the weighing sensor (203), an opening and closing mechanism (205) fixed to the lower end of the weighing hopper (204), and a cylinder (206) with one end fixed to the weighing hopper (204) and the other end connected to the opening and closing mechanism (205); Detection assembly (3); The detection assembly (3) includes a detection bracket (302) fixed on the base plate (201) and a detection element (301) fixed on the detection bracket (302), the detection element (301) being used to detect the weight of the material inside the mold; The host computer component (4) is connected to the vibrating motor (103), the electromagnetic vibrating feeder (107), the weighing sensor (203), the cylinder (206), and the detection element (301) respectively, and is used to receive and process weight data and detection data, and control the operation of each component.

2. The feeding device for metal powder according to claim 1, characterized in that, The feeding pipe (102) is a flange structure and is fixedly connected to the frame (101) by screws. The vibration motor (103) is fixedly connected to the side wall of the feeding pipe (102) by a fixing plate and bolts.

3. The feeding device for metal powder according to claim 1, characterized in that, The electromagnetic vibrating feeder (107) is tunably fixed to the lower plate (108) via a fixed plate and a screw, and an elastic buffer pad is provided between the screen box (106) and the electromagnetic vibrating feeder (107).

4. The feeding device for metal powder according to claim 1, characterized in that, The weighing assembly (2) also includes a feeder (207) and a conveying module (208). The feeder (207) is fixed on the conveying module (208) and is used to uniformly convey the powder in the weighing hopper (204) to the mold cavity.

5. A feeding device for metal powder according to claim 4, characterized in that, The conveying module (208) is a linear module driven by a servo motor, and the material feeder (207) is a vibrating material feeder. The outlet position of the material feeder (207) corresponds to the position of the mold cavity.

6. A feeding device for metal powder according to claim 1, characterized in that, The detection element (301) is a weighing sensor, used to detect changes in the weight of the mold in real time and transmit the detection data to the host computer component (4) in real time.

7. A feeding device for metal powder according to claim 1, characterized in that, The host computer component (4) includes an electrical control cabinet, a PLC controller, a human-machine interface and a data storage module. The PLC controller is used to receive data from the weighing sensor (203) and the detection element (301) in real time and compare it with a preset threshold to control the operation of the vibrating motor (103), the electromagnetic vibrating feeder (107) and the cylinder (206).

8. A feeding device for metal powder according to claim 7, characterized in that, The host computer component (4) also includes an alarm module. When the mold weight data detected by the detection element (301) exceeds the preset threshold range, the alarm module issues an audible and visual alarm signal and automatically cuts off the power supply to the vibration motor (103) and the electromagnetic vibration feeder (107).

9. A feeding device for metal powder according to any one of claims 1 to 8, characterized in that, The feeding device also includes a dust cover, which covers the outside of the silo (104), the discharge pipe (102), the discharge hopper (105), the sieve box (106) and the weighing hopper (204) to prevent powder from leaking out and polluting the environment.

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