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Positioning plate stamping mould design
This design is the design of the punching blanking composite mold, using the basic knowledge of stamping forming technology and die design, the figure for stamping die mold process of a given analysis, size calculation, data access, so as to design the mold.
Common cold stamping mould design is according to the size of the design components, materials, such as mass production process step by step analysis to determine the blanking process design and die structure, and then through the process design and calculation, calculation of impact force and pressure center, primary press die set and standards.This design introduced the die design of the layout and the way feeding and discharging and orientation, calculate the convex and concave die cutting edge dimension and tolerance, finally chooses parts design, check and draw the mold assembly drawing.And some of the components are selected according to the standard, there is no further design.This design through the analysis of the process, considering the economy, parts stamping manufacturability as well as the complexity and precision on the basis of many factors, such as finishing.
Positioning plate material is Q235 plain carbon steel, the thickness of 0.5 mm, mass production.First, the structure analysis was carried out on the workpiece, the cutting process analysis, demonstration, carries on the overall structure design of mould scheme, the main pieces of process planning, must process calculation, manufacturing, and certain technical and economic analysis, etc.Then, the design and the main parts of the die, and draw the working parts of general assembly drawing and part drawing.
The blanking pieces of material is Q235 plain carbon steel, its mechanical performance is good, meet the use requirement, at the same time also has a good stamping performance, suitable for positioning plate blanking.This design adopts the punching, blanking compound stamping with composite mold production.Flip chip type compound die structure is simple, can be directly used to press a lever device to push unloading.And so it is easy to operate security, can guarantee high productivity.And formechanization provides favorable conditions,
So the application is very extensive.And suit type composite structure is relatively complex, the safety coefficient is low, be determined by the above analysis of the parts production using inversion type composite mold production.
Positioning of progressive die parts are used to ensure the correct article material sent to and the right location in the mould.
Because the guide pin and pin structure is simple, convenient.And the mould adopts the article is expected, according to the mold concrete structure both economic benefit, control stock into the direction of the guide pin, fixed pin block is adopted in the feeding interval.
Discharge way, workpiece straightness is higher, the material thickness of 0.5 mm is relatively thin, unloading force is not big, because of the pressure unloading mold than rigid unloading mold is convenient, the operator can see the material in the mold to the dynamic, flexible and elastic unloading slabs workpiece clamp is, will not damage the surface, it can adopt flexible unloading.
The purpose of ejecting from waste die.Down the agency called the push rod, usually in the upper die;
By using inversion composite mold production, the elastic is adopted on the parts.
This design for selection of stamping equipment is open press the transverse feeding way is adopted, namely feeding from right to left.The side guide column formwork.Due to the front and around is not restricted, feeding and operation more convenient.And cannot use a floating die handle.
The use have waste, layout, blanking pieces according to the layout method of the calculation of material utilization, cross cutting, longitudinal cutting sheet metal utilization rate is 70%, and so the longitudinal cutting, cross cutting way of layout are available
Blanking force is in the process of blanking punch of sheet metal pressure, it is with the punch into the depth of the material.Usually said the blanking force refers to the maximum cutting force, it is one of the important basis for choose press and mould design.So you need to calculate the cutting force, discharge power, punching force, to determine the total pressure of a force.By querying the appendix: open type tilting press parameter table.Therefore, the primary press for: J23 series open-type inclinable press J23-4.
Working parts of blade size calculated this design USES the convex and concave mold processing.?
Design of concave and convex die parts appearance is relatively simple, and consider the processing according to actual condition, in order to meet the intensive strength and rigidity, intensive design into step, make assembly mould is convenient.
The design of the blanking die, die structure form is more, according to the shape can be divided into standard round concave die and tabular concave die, according to the structure is divided into integral type, insert or spell and combined.Also has the form of the blade flat blade and oblique blade.Generally use the integral and more set spell type, according to parts for a variety of geometric shapes, integral is applicable to small, convex and concave die set spell combined is mainly used for large convex and concave die.According to above analysis should use monolithic, all kinds of die of the concave die adopt wedm machining, arrange the location of the concave die in the die frame, according to the calculation of pressure center data, the pressure center and mold the handle.According to the actual production needs, the use of shape for the rectangular plate die.Concave mold adopts the whole die, outline all adopt CNC wedm can be a forming, the location of the installation of concave die in the die frame, in accordance with the data of pressure center, try to keep the pressure center and mold the handle.Calculate the size of the contour.There are three kinds of die the fixed way: the first is a hot and cold;The second is the low melting point alloy, epoxy resin casting and inorganic adhesive;The third is the screw fastening, pin location.Using the first don't drag, it is mainly used for cold extrusion of prestressed die.In the second, the fastening force is small, do not drag.Using a third, fastening force big, reliable positioning, strong commonality, easy installation and is suitable for various kinds of mold used, to ensure that the screw hole between, between the screw hole and pin hole and screw hole or pin hole and concave die cannot too close to the distance between the edge, otherwise it will affect the service life of mould.According to above analysis should use screw fastening, pin location.
Die with rectangular slab structure and directly through the screw, pin and the mold base is fixed on the fixed way.For salt pieces in mass production, considering the die wear and guarantee the quality of stamping, die blade, blade adopts straight cylindrical blade intensity is higher, the form after grinding blade size constant, used for blanking shape or high precision parts.
The design of the punch punch, punch length according to the specific structure of the mould, and fixed length according to wear plate, stripper plate thickness to decide.
The design of other parts due to large rubber allowed to carry the load, convenient installation, it is common in blanking die elastic element.
For discharge in the blanking of polyurethane rubber and synthetic rubber, rubber with excellent performance than synthetic rubber, polyurethane rubber so using polyurethane rubber, the shape of cylindrical rubber.
The purpose of design discharge part is after cutting clamp on the punch or on intensive parts or removing waste, are: the most common ways of discharging rigid discharge, pressure stripper plate.This design adopts the pressure discharge device, its are basic parts is a stripper plate, discharging screw and elastic element (spring or rubber)
The distance between holes and hole not too close, this will affect the service life of mould, and affect the stiffness and strength.Installation plate must consider when between holes and hole edge.
Is the role of fixed plate punch (intensive) fixed position on the mold base is correct, the fixed plate is rectangular or circular plate, a fixed plate with the punch (intensive) for the H7 / h6 cooperate, after installation, punch (intensive) shall be end face grinding flat with the fixed plate.
The function of upper and lower mold base is directly or indirectly, to install all parts of progressive die, and respectively connected to the press slide block and the table, to transfer pressure.Therefore, the strength and stiffness of the upper and lower die shoe is the major consideration.Mold base due to insufficient strength will produce damage, if the stiffness is insufficient, work would produce large elastic deformation, lead to the working parts of the mold and the guide parts rapid wear.
Guide pillar and guide sleeve structure and size are generally not directly by the selected from the standard, in the length of the column should be selected to ensure that die at the end of the job position, guide pin end face and the mold base on the top surface distance of not less than 10 ~ 15 mm.Working in the highest position, guide pin on the end face with the distance of not less than the lower end of the guide sleeve (10 ~ 20) mm, with precision of the guide pin and guide bush by table found to choose class II.
In the small die mold is generally on the die will handle is fixed on the press ram.The handle mould is as upper die parts connected to the press ram.For it is the basic requirement of: die and press the slider on the handle from a hole, right installation and reliable;Second, we must to die on the correct and reliable connection.
Two guide pin is located in the same side, strip along the two guide pin straight sent to determine and feeding from right to left, the guide pin on the back;Feed back once upon a time, the guide pin is installed on the left side.By blocking pin to control the feeding interval, in the upper die setting corresponding pilot hole, fixed to the concave in the template.
Stripper plate set up 4 discharge screw, the nominal diameter of 10 mm, threaded portion of the M8 x 8 mm.Discharge screw tail should leave enough space schedule and after discharging screw, should make the stripper plate is beyond punch face 1 mm, when there is error with screw mounting pads to adjust between the stripper plate.
Using a pin block installed on the die.Check standard JB/T7649.10-1994, selection of radius of 4 mm pin, beginning with the retaining pin the diameter of the fixed part and working part of the difference is very big, not weaken the strength of the die, and the manufacture is simple, easy to use.
Press check, according to the mould height, choose to press.Make the mould height is less than the selected press shut height.
Through the design, learn a lot from it not previously learned knowledge, the future will be more efforts to learn knowledge well, and work to lay a solid foundation for future employment.
定位板沖壓模具設(shè)計
本設(shè)計是沖裁復(fù)合模具的設(shè)計，利用沖壓成形工藝和模具設(shè)計的基本知識，對沖裁模具的模具工藝過程進行給定分析、尺寸計算、數(shù)據(jù)存取，從而進行模具設(shè)計。
常用冷沖壓模具的設(shè)計是根據(jù)零件尺寸、材料等批量生產(chǎn)過程逐步分析確定沖裁工藝設(shè)計和模具結(jié)構(gòu)，然后通過工藝設(shè)計和計算，計算沖擊力和壓力機。本設(shè)計主要介紹了模具的布局設(shè)計、進給方式、排料方式、定位方法，計算了凸凹模的切削刃尺寸和公差，最后選擇零件設(shè)計，檢查并繪制了模具裝配圖。本設(shè)計通過工藝分析，在綜合考慮經(jīng)濟性、零件沖壓可制造性以及復(fù)雜性、精度等諸多因素的基礎(chǔ)上，對零件進行精加工。
定位板材料為Q235普通碳素鋼，厚度0.5mm，批量生產(chǎn)。首先，對工件進行結(jié)構(gòu)分析，對切削過程進行分析、論證，進行模具總體結(jié)構(gòu)設(shè)計方案，對主要零件進行工藝規(guī)劃。必須進行工藝計算、制造和一定的技術(shù)經(jīng)濟分析等。然后，對模具的設(shè)計和主要零件進行制圖，并繪制出工作零件的總裝配圖和零件圖。
該沖裁件材料為Q235普通碳素鋼，其力學(xué)性能良好，滿足使用要求，同時具有良好的沖壓性能，適用于定位板沖裁。倒裝片式復(fù)合模結(jié)構(gòu)簡單，可直接用于壓桿裝置推卸，操作方便，安全可靠，可保證高生產(chǎn)率。
因此應(yīng)用非常廣泛，而適合型復(fù)合結(jié)構(gòu)比較復(fù)雜，安全系數(shù)較低，通過以上分析確定采用倒置型復(fù)合模具生產(chǎn)的零部件。
級進模零件的定位用來確保正確的物品材料送到模具和正確的位置。
由于導(dǎo)銷和銷結(jié)構(gòu)簡單，使用方便，模具采用本品，根據(jù)模具混凝土結(jié)構(gòu)既經(jīng)濟效益，又控制庫存流向?qū)тN，進料間隔采用固定銷塊。
出料方式，工件直線度較高，材料厚度為0.5mm比較薄，出料力不大，因為壓力卸料模具比剛性卸料模具方便，操作者可以看到模具內(nèi)的材料向動態(tài)、柔性和彈性卸料。板坯工件夾持時，不會損壞表面，故可采用柔性卸料。
從廢模具中彈出的目的。下機構(gòu)稱為推桿，通常在上模中；
通過倒裝復(fù)合模具生產(chǎn)，在零件上采用了彈性。
本設(shè)計選型沖壓設(shè)備為開式壓力機，采用橫向進給方式，即從右向左進給，側(cè)導(dǎo)柱模板，由于前后不受限制，進給和操作更加方便，而且不能使用浮動模柄。
使用有廢料、排樣、沖裁件的排樣方法按材料利用率計算，橫切、縱切板材利用率為70%，因此縱切、橫切排樣方式是可行的。
沖裁力是沖裁過程中金屬板材所承受的壓力，它是隨著沖裁力進入材料的深度，通常所說的沖裁力指的是最大切削力，它是選擇沖裁機及模具設(shè)計的重要依據(jù)之一。g力、卸料力、沖裁力，確定總壓力的一個力。通過查詢附錄：開式傾動壓力機參數(shù)表。因此，主壓機為：J23系列開式斜壓機J23-4。
工作部件的葉片尺寸計算本設(shè)計采用凸模和凹模加工。
凹凸模零件外觀設(shè)計相對簡單，并根據(jù)實際情況考慮加工，以滿足強度和剛度的強化，集約化設(shè)計成步驟，使裝配模具方便。
沖裁模的設(shè)計中，模具結(jié)構(gòu)形式較多，根據(jù)形狀可分為標(biāo)準(zhǔn)圓形凹模和平面凹模。