CN-122018577-A - Surface dust removal control system for powder compression molding

CN122018577ACN 122018577 ACN122018577 ACN 122018577ACN-122018577-A

Abstract

The invention relates to the technical field of dust removal control, in particular to a surface dust removal control system for powder compression molding, which comprises a dust removal control module, a dust characteristic acquisition module, a dust removal performance judgment module, a dust removal working condition acquisition module, a dust removal working condition judgment module and a dust removal process correction module, wherein the dust characteristic acquisition module acquires wall surface shearing force, purge coverage rate and airflow dead zone residual value in a powder compression molding demoulding and purging period, analyzes dust particle size characteristic characterization values, determines whether momentum transfer effectiveness of a dust removal pulse blowing device meets the standard or not, responds to the situation that the momentum transfer effectiveness does not meet the standard, acquires airflow pressure attenuation rate and local airflow reflux amplitude in the same purging period, analyzes the dust removal pulse valve characteristic characterization values, and determines whether airflow pressure field stability of the dust removal pulse blowing device meets the standard or not so as to determine a treatment strategy. The invention improves the surface dust removal control efficiency.

Inventors

He Bangcheng
PAN GUANGYU
XUE WEISHENG
PENG JIANBIN
ZHANG DONGLIN

Assignees

广东何氏锐创智能装备有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (10)

1. A surface dust removal control system for powder compression molding, comprising: the dust removal control module is used for controlling the surface blowing dust removal of the target product in the powder compression molding and demolding process; the dust characteristic collection module is used for collecting dust particle diameter characteristic parameters in a powder pressing, forming, demolding and blowing period; The dust removal performance judging module is used for determining whether the momentum transfer effectiveness of the dust removal pulse blowing device meets the standard or not based on the comparison result of the dust particle size characteristic characterization value and the dust particle size characteristic characterization threshold value; the system comprises a dust removal working condition acquisition module, a dust removal pulse valve characteristic value analysis module and a dust removal pulse valve characteristic value analysis module, wherein the dust removal working condition acquisition module is used for acquiring the dust removal pulse valve characteristic parameter in the same purging period in response to the fact that the momentum transfer effectiveness of a dust removal pulse blowing device does not accord with the standard; The dust removal working condition judging module is used for determining whether the stability of the airflow pressure field of the dust removal pulse blowing device meets the standard or not based on the difference result of the characteristic characterization value of the dust removal pulse valve and the preset characteristic characterization threshold value of the dust removal pulse valve; a dust removal process correction module for determining that momentum transfer of the dust removal pulse blowing device is insufficient to cope with the complex surface in response to the air flow pressure field stability of the dust removal pulse blowing device conforming to a standard, determining to increase the number of pulses; Determining the adjustment amplitude for adjusting the distribution of the air flow of the purging nozzle based on the difference result of the characteristic characterization value of the dedusting pulse valve and the preset characteristic characterization threshold value of the dedusting pulse valve in response to the fact that the stability of the air flow field of the dedusting pulse blowing device does not meet the standard; wherein the dust particle size characteristic parameters comprise wall shear force, purge coverage rate and airflow dead zone residual value; the characteristic parameters of the dedusting pulse valve comprise airflow pressure attenuation rate and local airflow reflux amplitude.
2. The powder compression molding surface dust removal control system of claim 1, wherein the dust signature collection module analyzes a dust particle size signature value based on a sum of a first signature limiting signature parameter, a second signature limiting signature parameter, and a third signature limiting signature parameter, wherein, The first characteristic limiting characterization parameter is the ratio of the wall shearing force to a preset wall shearing force threshold value; the second characteristic limiting characterization parameter is the ratio of the purge coverage rate to a predetermined purge coverage rate threshold; the third characteristic defines a characterization parameter as a ratio of a predetermined airflow dead zone residual threshold to an airflow dead zone residual.
3. The surface dust removal control system for powder compression molding of claim 2, wherein the dust removal performance determination module is configured to determine that the momentum transfer effectiveness of the dust removal pulse blowing device meets a criterion on condition that the dust particle size characteristic characterization value is greater than a dust particle size characteristic characterization threshold value.
4. A surface dust removal control system for powder compression molding as set forth in claim 3, wherein the dust removal performance determination module is configured to determine that the momentum transfer effectiveness of the dust removal pulse blowing device is not in compliance with a criterion that the dust particle diameter characteristic characterization value is less than or equal to a dust particle diameter characteristic characterization threshold value.
5. The powder compression molding surface dust removal control system of claim 4, wherein the dust removal condition collection module is configured to analyze a dust removal pulse valve characteristic characterization value based on a sum of a first condition defining characterization parameter and a second condition defining characterization parameter, wherein, The first working condition limiting characterization parameter is the ratio of the air flow pressure decay rate to a preset air flow pressure decay rate threshold; The second condition defining characterization parameter is a ratio of the local airflow backflow amplitude to a predetermined local airflow backflow amplitude threshold.
6. The surface dust removal control system for powder compression molding of claim 5, wherein the dust removal condition determination module determines that the air flow pressure field stability of the dust removal pulse blowing device meets a standard on condition that a difference between a characteristic characterization value of the dust removal pulse valve and a predetermined characteristic characterization threshold value of the dust removal pulse valve is less than a predetermined difference threshold value.
7. The surface dust removal control system for powder compression molding of claim 6, wherein the dust removal condition determination module determines that the air flow pressure field stability of the dust removal pulse blowing device does not meet a standard is that a difference between the characteristic characterization value of the dust removal pulse valve and a predetermined characteristic characterization threshold value of the dust removal pulse valve is greater than or equal to a predetermined difference threshold value.
8. The surface dust removal control system for powder compression molding of claim 7, wherein the dust removal process correction module determines that the condition for increasing the number of pulses is that the stability of the air flow pressure field of the dust removal pulse blowing device meets a standard.
9. The surface dust removal control system for powder compression molding of claim 8, wherein the dust removal process correction module determines that the condition of the adjustment amplitude of the nozzle outlet flow distribution is that the air flow pressure field stability of the dust removal pulse blowing device does not meet a standard.
10. The powder compression molding surface dust removal control system of claim 9, wherein the dust removal process modification module is configured to determine the adjustment amplitude of the nozzle outlet flow distribution based on a difference result determination of the dust removal pulse valve characteristic characterization value and a predetermined dust removal pulse valve characteristic characterization threshold value.

Description

Surface dust removal control system for powder compression molding Technical Field The invention relates to the technical field of dust removal control, in particular to a surface dust removal control system for powder compression molding. Background In the powder compression molding process, residual powder is often attached to the surface of a demoulded target product, and cleaning is required to be carried out through blowing type dust removal so as to ensure the surface quality of the product and the processing reliability of subsequent procedures, the existing blowing type dust removal system generally adopts preset fixed purging parameters to operate, wherein the fixed purging parameters comprise fixed air pressure, fixed pulse times and fixed purging time, and the real-time detection and feedback adjustment capability of the actual purging effect is lacking in the whole production period. In actual production, the product surface morphology is complicated changeable and has dust particle diameter difference, factors such as air source pressure fluctuation, nozzle abrasion, pipeline blockage and the like can also lead to actual purging state to deviate from the initial setting, because the prior art can not acquire dust particle diameter data in real time, when problems such as incomplete dust stripping, dead zone of purging coverage, residual dust in an air flow dead zone and the like occur, the root cause of poor dust removal is difficult to accurately judge whether the purging strategy is insufficient or the air flow conveying performance is abnormal, namely the problem can not be distinguished, namely the problem is caused by insufficient pulse times, overlarge pressure attenuation or uneven air flow distribution, an empirical blind parameter adjustment mode is often adopted, the problem repeatedly occurs, the process stability is poor, and the product molding quality and the processing effect of subsequent procedures are finally influenced. Chinese patent publication No. CN119634729a discloses a blowing type demoulding device and a demoulding method for powder metallurgy products, which comprises a supporting seat, the output end of the motor is connected with a first bevel gear, one side of the supporting seat is fixed with a blowing mechanism, and the blowing mechanism is engaged and connected at the bottom of the first bevel gear. This air blowing formula shedder of powder metallurgy goods accomplishes and annotates material shaping operation after, second piston, movable frame and sealing down move, conveniently link up mould pipeline and passageway of blowing, the carousel is rotatory simultaneously, all extrusion pieces extrude the pull rod in turn, movable frame, pull rod and knock the piece and control the round trip movement under the extrusion of extrusion piece and the shoring effect of second compression spring, conveniently beat the mould pipeline repeatedly for the product is totally separated with the inner wall of mould pipeline, so that follow-up quick drawing of patterns, the passageway of blowing is automatic upwards blown, so that realize automatic drawing of patterns, and can avoid the product to be destroyed. The Chinese patent publication No. CN114101216A discloses a micro-aerosol program-controlled automatic cleaning mechanism for a die of an automatic powder forming press, which comprises a mounting plate and a shell, wherein the shell is fixedly connected with the mounting plate, a dust removing mechanism is connected with the shell, an atomization blowing mechanism is arranged on the outer side of the dust removing mechanism and is connected with the dust removing mechanism, the dust removing mechanism comprises a dust collecting assembly, a rotary connecting assembly and a dust removing pressurizing assembly, the dust collecting assembly is arranged on the outer side of the shell, the rotary connecting assembly is arranged between the dust collecting assembly and the shell, and the dust removing pressurizing assembly is arranged on the inner side of the shell and is connected with the rotary connecting assembly. Disclosure of Invention Therefore, the invention provides a surface dust removal control system for powder compression molding, which is used for solving the problems that dust removal air flow for powder compression molding surface dust removal is difficult to adapt to complex surface morphology of products, and whether momentum transfer effectiveness and air flow pressure field stability meet process requirements cannot be distinguished, so that wall dust is insufficiently stripped, dead areas exist in sweeping coverage, residual dust in air flow dead areas exist, and the surface dust removal control efficiency is reduced in the prior art. To achieve the object, the present invention provides a surface dust removal control system for powder compression molding, comprising: the dust removal control module is used for controlling the surface blowing dust remova