CN109773023A - A kind of Sheet Metal Forming Technology of distribution box timber - Google Patents

A kind of Sheet Metal Forming Technology of distribution box timber Download PDF

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Publication number
CN109773023A
CN109773023A CN201811597007.0A CN201811597007A CN109773023A CN 109773023 A CN109773023 A CN 109773023A CN 201811597007 A CN201811597007 A CN 201811597007A CN 109773023 A CN109773023 A CN 109773023A
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CN
China
Prior art keywords
distribution box
punching
sheet metal
stamping
forming technology
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811597007.0A
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Chinese (zh)
Inventor
黄丙宽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luan Cornell Electric Co Ltd
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Luan Cornell Electric Co Ltd
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Filing date
Publication date
Application filed by Luan Cornell Electric Co Ltd filed Critical Luan Cornell Electric Co Ltd
Priority to CN201811597007.0A priority Critical patent/CN109773023A/en
Publication of CN109773023A publication Critical patent/CN109773023A/en
Pending legal-status Critical Current

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Abstract

The present invention discloses a kind of Sheet Metal Forming Technology of distribution box timber, including following process: raw material storage, metal material acid wash passivation are dried, carry out punching process character analysis, the determination of process program, the calculating of main technologic parameters, the selection of stamping die, the selection of stamping equipment, establishment Sheet Metal Forming Technology card according to product design document.The Sheet Metal Forming Technology of distribution box timber disclosed in this invention, design process is rationally scientific, and process is simply controllable, the punching production of sheet metal component is set to be easier to realize, it is ensured that product quality improves the yields of product, ram efficiency can be effectively improved, production cost and time are saved.

Description

A kind of Sheet Metal Forming Technology of distribution box timber
Technical field
The present invention relates to stamping technology field, the Sheet Metal Forming Technology of specifically a kind of distribution box timber.
Background technique
Distribution box is the magnanimity parameter in data, and usually composition low pressure woods presses electrical wiring, it is desirable that by switchgear, is surveyed Amount instrument, protection electric appliance and ancillary equipment are assembled in closing or semiclosed metal safe or in screen width, constitute low-tension distribution box.Just It can be by manual or automatic switch connection or disjunction circuit when often operation.Common distribution box have it is wooden and two kinds of made of metal, because Want higher for metal distribution box degree of protection, thus still metal comparison it is more.Sheet metal needs at stamped technique Distribution box is prepared after reason again.
Punching press is that depended on pressure machine and mold apply external force to plate, band, tubing and profile etc., is allowed to generate plastic deformation Or separation, thus the forming and machining method of the workpiece (stamping parts) of shape and size needed for obtaining.Punching press and forging belong to plasticity It processes (or pressure processing), is collectively referred to as forging and pressing.The blank of punching press is mainly the steel plate and steel band of hot rolling and cold rolling.Global steel In material, 60~70% be plate, and finished product is made by punching press in wherein most.Vehicle body, chassis, fuel tank, the radiator of automobile The drum of piece and boiler, shell, motor, iron core silicon-steel sheet of electric appliance of container etc. are all punch process.Instrument and meter, household In the products such as electric appliance, bicycle, office machinery, household utensil, also there are a large amount of stamping parts.
In the prior art, sheet metal is all to be processed by punch forming, but existing technological design is complicated, is lacked Weary reasonability, finished product error is larger, and is unable to satisfy demand of the client to finished product accuracy.
Summary of the invention
The purpose of the invention is to provide a kind of Sheet Metal Forming Technology of distribution box timber, the punching press process that the present invention designs is walked It is rapid reasonable in detail, it is ensured that product quality improves the qualification rate of product.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of Sheet Metal Forming Technology of distribution box timber, which is characterized in that the process carries out as steps described below:
Step 1, raw material storage;
Step 2, metal material acid wash passivation are dried;
1) pickling processes choose the hydrochloric acid (HCL) of 25%-30%, the nitric acid (HNO of 15%-20%3), 28% phosphoric acid (H2CrO4) and 17%-22% hydrofluoric acid (HF) mixed after be added corrosion inhibitor lauryl sodium sulfate (SDS) be configured to acid Washing lotion after carrying out pickling to metal material using pickling solution, then is cleaned and dried;
2) Passivation Treatment chooses 20% nitric acid solution as passivator, and metal material is placed on to fill 20% nitric acid molten It in the passivation pool of liquid, controls passivation pool temperature and is passivated duration, after the completion of metal material Passivation Treatment, carry out cleaning and be put into drying Drying in case.
Step 3 carries out punching process character analysis according to product design document;
1) material, metal material used in distribution box timber are the carbon steel of 08F, t=1.5mm, and mechanical property is good It is good, meet requirement, there is good punching performance;
2) distribution box plate construction simple symmetric, plate surface have multiple rectangle heat release holes;
3) dimensional accuracy, the size of all without individual tolerance belongs to free size on product design document, and required precision is relatively low, can By the tolerance of IT11 grades of work determining sizes.
Step 4, the determination of process program;
First punching, again blanking, then cutting, deburring, are produced using single die;
The calculating of step 5, main technologic parameters is as follows:
Calculate blanking pressure F1:
F1=KLt εb
Wherein, the shearing strength limiting value ε of material known to tabling look-upbFor 360N/mm2,
It is 1.5mm that K value, which takes 1.3, material thickness t, and punching perimeter L is 3.38-3.44mm;
Calculate stripping force F2:
F2=KX×F1
Wherein Kx0.045 can be obtained by tabling look-up;
Calculate ejecting force:
F3=ktF1
Kt0.063 can be obtained by tabling look-up;
The total stamping press F of mold:
F=F1+F2+F3
Calculate stock utilization y:
Scrap (bridge) numerical tabular is consulted, it is a=2.0mm that edge-lapped value, which is along feeding direction scrap (bridge), lateral scrap (bridge) b=2.0mm, metal Material width B is 1m, thus can calculate step pitch S=100+b=102mm;
Y=A/BS × 100%
The real area of blanking part in mono- step pitch of A-;
B- blanking part width;
S- step pitch;
The grid mould of punch-pin, cavity plate, blank holder, plate is established in step 6, the selection of stamping die with finite element method Type inputs distribution box sheet material parameter, determines and uses compound die;
Step 7, the selection of stamping equipment select stamping equipment with matching according to the type of stamping die;
Step 8, the establishment of operation card, operation card content include following two:
1) analyze the craftsmanship of stamping parts, the product figure and technical conditions of stamping parts, the dimensions of raw material, performance and Supply situation, the production batch of product, the existing stamping equipment condition of factory, the existing mold manufacturing condition of factory and technology water It is flat.
2) the moulding process scheme of stamping parts is determined, the property of stamping procedure, quantity, sequence, combination and other The arrangement of auxiliary process.
The pickling temperature is 30 DEG C, when pickling a length of 100min-125min.
The passivation pool temperature a length of 60min-85min at 20 DEG C -25 DEG C, passivation.
The distribution box timber side length is set as d, and the requirement to d is as follows: 3cm≤d≤5cm, and distribution box timber wall thickness exists Between 1.5mm, the most narrow spacing between square hole is 40 ± 0.8mm, minimum aperture back gauge >=1.5t=1.5mm.
The process program further includes following two:
1) punching-blanking, compound punching, then cutting, deburring, are produced using compound die.
2) punching-blanking, continuous punching, then cutting, deburring, are produced using progressive die.
The invention has the advantages that:
The Sheet Metal Forming Technology of distribution box timber disclosed in this invention, design process is rationally scientific, and process is simply controllable, makes metal plate The punching production of golden part is easier to realize, it is ensured that product quality improves the yields of product, can effectively improve punching press effect Rate saves production cost and time.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.
Fig. 1 is flow diagram of the invention;
Fig. 2 is the main view of distribution box workpiece of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.
A kind of Sheet Metal Forming Technology of distribution box timber, including following process: raw material storage, metal material acid wash passivation are dry Processing carries out punching process character analysis, the determination of process program, the calculating of main technologic parameters, stamping die according to product design document The selection of tool, the selection of stamping equipment, establishment Sheet Metal Forming Technology card.
A kind of Sheet Metal Forming Technology of above-mentioned distribution box timber, detailed process are as follows:
Step 1, raw material storage, is purchased according to the quantity of required plate.
Step 2, metal material acid wash passivation are dried, and specific processing step is as follows:
1) pickling processes choose the hydrochloric acid (HCL) of 25%-30%, the nitric acid (HNO of 15%-20%3), 28% phosphoric acid (H2CrO4) and 17%-22% hydrofluoric acid (HF) mixed after be added corrosion inhibitor lauryl sodium sulfate (SDS) be configured to acid Washing lotion, at being 30 DEG C in temperature to using pickling solution to metal material progress pickling after, then be cleaned and dried.
2) Passivation Treatment chooses 20% nitric acid solution as passivator, and metal material is placed on to fill 20% nitric acid molten In the passivation pool of liquid, passivation pool temperature a length of 60min-85min, metal material Passivation Treatment at 20 DEG C -25 DEG C, passivation are controlled After the completion, it carries out cleaning and is put into drying in drying box.
Step 3, punching process character analysis.
1) material, metal material used in distribution box timber are the carbon steel of 08F, t=1.5mm, and mechanical property is good It is good, meet requirement, there is good punching performance.
2) distribution box plate construction simple symmetric, as shown in Fig. 2, plate surface has multiple rectangle heat release holes, side length It is set as d, the requirement to d is as follows: 3cm≤d≤5cm, most narrow spacing of the distribution box timber wall thickness between 1.5mm, between square hole For 40 ± 0.8mm, meets blanking part minimum aperture back gauge >=1.5t=1.5mm requirement, meet wall thickness requirement allowable, therefore the system Part has good punching process character, is suitble to punching.
3) dimensional accuracy, the size of all without individual tolerance belongs to free size on product design document, and required precision is relatively low, can By the tolerance of IT11 grades of work determining sizes.
Step 4, the determination of process program, preparing the two pieces part includes four blanking, punching, cutting, deburring steps.
Blanking, which refers to, to be punched with punch die along closed curve, and the component swept away is workpiece, and rest part is waste material;
Punching refers to that with mold, the part swept away is that waste material is gone along first line blanked sheet material is closed;
Cutting refers to not to be closed with scissors or mold cutting plate, cutting line;
Deburring, which refers to, to be stretched or the excess stock of semi-finished product marginal portion after molding is cut away.
Concrete scheme is as follows:
1) first punching, again blanking, then cutting, deburring, are produced using single die.
2) punching-blanking, compound punching, then cutting, deburring, are produced using compound die.
3) punching-blanking, continuous punching, then cutting, deburring, are produced using progressive die.
Three of the above scheme can choose any one kind of them scheme as the scheme for producing distribution box timber.
Step 5, the calculating of main technologic parameters.
Calculate blanking pressure F1:
F1=KLt εb
Wherein, the shearing strength limiting value ε of material known to tabling look-upbFor 360N/mm2
It is 1.5mm that K value, which takes 1.3, material thickness t, and punching perimeter L is 3.38-3.44m.
Calculate stripping force F2:
F2=KX×F1
Wherein Kx0.045 can be obtained by tabling look-up.
Calculate ejecting force:
F3=ktF1
Kt0.063 can be obtained by tabling look-up.
The total stamping press F of mold:
F=F1+F2+F3
Calculate stock utilization y:
Scrap (bridge) numerical tabular is consulted, it is a=2.0mm that edge-lapped value, which is along feeding direction scrap (bridge), lateral scrap (bridge) b=2.0mm, metal Material width B is 1m, thus can calculate step pitch S=100+b=102mm.
Y=A/BS × 100%
The real area of blanking part in mono- step pitch of A-;
B- blanking part width;
S- step pitch.
The grid mould of punch-pin, cavity plate, blank holder, plate is established in step 6, the selection of stamping die with finite element method Type inputs distribution box sheet material parameter, finally uses compound die.
Step 7, the selection of stamping equipment select the stamping equipment of model YF30-30 to carry out punching press to metal material.
Step 8 works out Sheet Metal Forming Technology card, and Sheet Metal Forming Technology card includes following two:
1) analyze the craftsmanship of stamping parts, the product figure and technical conditions of stamping parts, the dimensions of raw material, performance and Supply situation, the production batch of product, the existing stamping equipment condition of factory, the existing mold manufacturing condition of factory and technology water It is flat.
2) the moulding process scheme for determining stamping parts, consider the property of stamping procedure, quantity, sequence, combination and The arrangement of other auxiliary processes.
The stamping procedure of present embodiment, flat part can be directly prepared into or be such as bent for other stamping procedures, Drawing, forming etc. prepare blank, and notch, deburring etc. can also be carried out on formed stamping parts.Punching be widely used in automobile, The industrial departments such as household electrical appliance, electronics, instrument and meter, machinery, railway, communication, chemical industry, light industry, weaving and aerospace.This Specific embodiment is a reasonable process program, not only can provide technology for stabilized product quality, reduction cost of stamping Guarantee, and may be the advantageous condition of Organization And Management's creation of production.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example. Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close Suitable mode combines.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.

Claims (5)

1. a kind of Sheet Metal Forming Technology of distribution box timber, which is characterized in that the process carries out as steps described below:
Step 1, raw material storage;
Step 2, metal material acid wash passivation are dried;
1) pickling processes choose the hydrochloric acid (HCL) of 25%-30%, the nitric acid (HNO of 15%-20%3), 28% phosphoric acid (H2CrO4) and 17%-22% hydrofluoric acid (HF) mixed after be added corrosion inhibitor lauryl sodium sulfate (SDS) be configured to acid Washing lotion after carrying out pickling to metal material using pickling solution, then is cleaned and dried;
2) Passivation Treatment chooses 20% nitric acid solution as passivator, metal material is placed on and fills 20% nitric acid solution In passivation pool, controls passivation pool temperature and be passivated duration, after the completion of metal material Passivation Treatment, then be cleaned and dried;
Step 3 carries out punching process character analysis according to product design document;
1) material, metal material used in distribution box timber are the carbon steel of 08F, t=1.5mm, and good mechanical properties are full Sufficient requirement has good punching performance;
2) distribution box plate construction simple symmetric, plate surface have multiple rectangle heat release holes;
3) dimensional accuracy, the size of all without individual tolerance belongs to free size on product design document, and required precision is relatively low, by work The tolerance of IT11 grades of determining sizes;
Step 4, the determination of process program;
First punching, again blanking, then cutting, deburring, are produced using single die;
The calculating of step 5, main technologic parameters is as follows:
Calculate blanking pressure F1:
F1=KLt εb
Wherein, the shearing strength limiting value ε of material known to tabling look-upbFor 360N/mm2,
It is 1.5mm that K value, which takes 1.3, material thickness t, and punching perimeter L is 3.38-3.44mm;
Calculate stripping force F2:
F2=KX×F1
Wherein Kx0.045 can be obtained by tabling look-up;
Calculate ejecting force:
F3=ktF1
Kt0.063 can be obtained by tabling look-up;
The total stamping press F of mold:
F=F1+F2+F3
Calculate stock utilization y:
Scrap (bridge) numerical tabular is consulted, it is a=2.0mm that edge-lapped value, which is along feeding direction scrap (bridge), lateral scrap (bridge) b=2.0mm, metal material Width B is 1m, thus can calculate step pitch S=100+b=102mm;
Y=A/BS × 100%
The real area of blanking part in mono- step pitch of A-;
B- blanking part width;
S- step pitch;
The grid model of punch-pin, cavity plate, blank holder, plate is established in step 6, the selection of stamping die with finite element method, defeated Enter distribution box sheet material parameter, determines and use compound die;
Step 7, the selection of stamping equipment select stamping equipment with matching according to the type of stamping die;
Step 8, the establishment of operation card, operation card content include following two:
1) craftsmanship of stamping parts, the product figure and technical conditions of stamping parts, dimensions, performance and the supply of raw material are analyzed Situation, the production batch of product, the existing stamping equipment condition of factory, the existing mold manufacturing condition of factory and technical level;
2) the moulding process scheme of stamping parts, property, quantity, sequence, combination and the other auxiliary of stamping procedure are determined The arrangement of process.
2. a kind of Sheet Metal Forming Technology of distribution box timber according to claim 1, which is characterized in that the pickling temperature is 30 DEG C, when pickling a length of 100min-125min.
3. a kind of Sheet Metal Forming Technology of distribution box timber according to claim 1, which is characterized in that the passivation pool temperature exists 20 DEG C -25 DEG C, when passivation a length of 60min-85min.
4. a kind of Sheet Metal Forming Technology of distribution box timber according to claim 1, which is characterized in that distribution box timber side Length is set as d, and the requirement to d is as follows: 3cm≤d≤5cm, minimum of the distribution box timber wall thickness between 1.5mm, between square hole Away from for 40 ± 0.8mm, minimum aperture back gauge >=1.5t=1.5mm.
5. a kind of Sheet Metal Forming Technology of distribution box timber according to claim 1, which is characterized in that the process program also wraps Include following two:
1) punching-blanking, compound punching, then cutting, deburring, are produced using compound die;
2) punching-blanking, continuous punching, then cutting, deburring, are produced using progressive die.
CN201811597007.0A 2018-12-26 2018-12-26 A kind of Sheet Metal Forming Technology of distribution box timber Pending CN109773023A (en)

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CN111571136A (en) * 2020-05-21 2020-08-25 昆山久茂电子科技有限公司 Workpiece stamping process for electronic product processing
CN112453160A (en) * 2020-11-24 2021-03-09 李方 Metal plate stamping correction method
CN114457288A (en) * 2022-01-20 2022-05-10 山西太钢不锈钢股份有限公司 High-nitrogen austenitic stainless steel and preparation method of middle plate thereof
CN115464334A (en) * 2022-07-19 2022-12-13 佑达光电科技(苏州)有限公司 Computer shell and punch forming method thereof

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Publication number Priority date Publication date Assignee Title
CN111571136A (en) * 2020-05-21 2020-08-25 昆山久茂电子科技有限公司 Workpiece stamping process for electronic product processing
CN112453160A (en) * 2020-11-24 2021-03-09 李方 Metal plate stamping correction method
CN114457288A (en) * 2022-01-20 2022-05-10 山西太钢不锈钢股份有限公司 High-nitrogen austenitic stainless steel and preparation method of middle plate thereof
CN115464334A (en) * 2022-07-19 2022-12-13 佑达光电科技(苏州)有限公司 Computer shell and punch forming method thereof

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