CN204867002U - Double acting hydraulic pressure drawing die - Google Patents

Abstract

The utility model discloses a double acting hydraulic pressure drawing die, including fixing the die on the workstation and fixing the terrace die on double action hydraulic press's interior slider, still include and install the holding pad on the double action hydraulic press outer slide through the backing plate, the terrace die passes presses flitch and die connection, the upper surface of die still is equipped with prevents liquid splash barricade, is equipped with liquid -filled chamber and hydraulic pressure pipe in the die, the liquid -filled chamber passes through the hydraulic pressure pipe and is connected with external hydraulic control system infusion mouth. Use the utility model discloses a mould can strengthen the bearing capacity of punch -nose angle district sheet material, and improvement forming limit reduces the passage that takes shape, is applicable to taking shape of complicated shell part, especially is fit for the shaping part that has the complicated shape of in -process one, makes the unable part that takes shape of traditional processing method even, and material utilization rate is high. Through the control of hydraulic control system to liquid medium, easily realize the part performance to the requirement of forming technology, material rational distribution has fine practical value and economic benefits.

Description

Two hydrodynamic pressure drawing die

Technical field

The utility model relates to technical field of mold, particularly refers to a kind of two hydrodynamic pressure drawing die.

Background technology

Along with the development of society and the continuous progress of science and technology, automobile industry is more and more higher for the requirement of surface quality of workpieces and complex-shaped degree, and common cold moulding technology has been difficult to the requirement meeting user.Increasing mould producer starts how research direction location is produced high-quality part better now.

EP6 oil sump feature: complex-shaped, drawing depth is large, surface requirements quality is high.Through many-sided simulation, common drawing die cannot produce qualified products, just can only can obtain qualified products by hydraulic pressure drawing.Conventional structure not only operation is loaded down with trivial details, and surface quality is bad.

When relating to the part of some complexity, especially the part complex-shaped, drawing depth large surface requirements quality is high, cost (a point drawing sequence several times just can complete) can be increased when adopting traditional dies to design this kind of drawn component, operating efficiency low (taking device resource and human resources during debugging), and produce surface quality of workpieces difference (repeatedly drawing can make piece surface wrinkling, there is the phenomenons such as part is pulled, the thinning and cracking of part).

Summary of the invention

The purpose of this utility model will provide a kind of structure simple exactly, and stock utilization is high, with low cost, effectively can shorten two hydrodynamic pressure drawing dies in Operational preparation cycle.

For achieving the above object, two hydrodynamic pressure drawing dies designed by the utility model, the punch comprising fixing die on the table and be fixed on the inner slide of double action hydraulic press, is characterized in that: also comprise the holding pad be arranged on by backing plate on double action hydraulic press outer slide; Described punch is connected with die through holding pad; The upper surface of described die is also provided with liquid-proof splash barricade, is provided with liquid-filled chamber and hydraulic tube in die, and described liquid-filled chamber is connected with external hydraulic control system infusion port by hydraulic tube.

The utility model has the advantage of:

One, only needs the half (die or punch) in one set of die, and fluid media (medium) replaces die or punch carrys out transmitted load to realize sheet material forming, not only reduces die cost like this, and shortens the Operational preparation cycle.

Its two, fluid pressure effect makes plate tightly be attached on punch, and liquid forms fluid lubrication between die upper surface and plate lower surface, reduce piece surface scratch, part quality is good, and dimensional accuracy is high.

They are three years old, form friction under pressure effect between plate and punch and keep effect, strengthen the bearing capacity of punch-nose angle district plate, improve forming limit, reduce shaping passage, be shaped complicated thin shell accessory, is especially applicable to the part that one in-process shaping has complicated shape, even manufacture the part that traditional diamond-making technique cannot be shaped, stock utilization is high.

Its four, by the control of hydraulic control system to liquid medium, be easy to realize the requirement of part performance to forming technology, material reasonable distribution.

Its five, mould has versatility, and the blank of unlike material, different-thickness can with a secondary die forming.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 adopts hydro-drawing technology of the present utility model and traditional drawing technology to contrast schematic diagram.

Fig. 3 is hydro-drawing technical process schematic diagram of the present utility model.

In figure: die 1, holding pad 2, punch 3, liquid 4, hydraulic tube 5, liquid-proof splash barricade 6, blank holder 7, plate 8, liquid-filled chamber 9.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Two hydrodynamic pressure drawing dies as shown in the figure, the punch 3 comprising fixing die 1 on the table and be fixed on the inner slide of double action hydraulic press, also comprises the holding pad 2 be arranged on by backing plate on double action hydraulic press outer slide; Punch 3 is connected with die 1 through holding pad 2; The upper surface of die 1 is also provided with liquid-proof splash barricade 6, is provided with liquid-filled chamber 9 and hydraulic tube 5 in die 1, and liquid-filled chamber 9 is connected with external hydraulic control system infusion port by hydraulic tube 5.

EP6 oil sump product, the material of this part is DX56D, expects thick 1.5mm, and product three exists negative angle, and within drafting angle 1 degree, product parts is smaller, and the degree of depth dark (relative to width), complex-shaped, punching press exists negative angle.

After EP6 oil sump Drawing die design is simulated by common Sheet Metal Forming Technology, reforming process flange wrinkle warpage, side wall wrinkling, cracking.Learn by taking turns stamping simulation debugging, drawing has cracking risk, and not being cracking at shaping net shape, is exactly wrinkling warpage more.Part stretches (two draw) process cracking, the distortion of reforming process profile seriously, cannot be shaping.

Judge according to the truncation Line on this part, cut, the molding mode of this part answers non-generic cold stamping shaped, part adopts the mode of the common punching presses such as a hydraulic pressure draw forming+reducing shaping shaping, this point is verified further in CAE simulation: get rid of cold stamping shaped possibility by the CAE simulation of multiple modeling scheme, first this part must adopt shaped by fluid pressure.

The course of work of the present utility model is as follows: this hydraulic forming mold adopts double acting die lamps structure, mould molding part mainly forms: die, liquid, punch, holding pad, hydraulic control system, liquid-proof splash barricade, empty at the bottom of die and be connected with the hydraulic control system outside mould for depositing liquid and setting up hydraulic tube, controlled the pressure of female bottom liquid by hydraulic control system with two dynamic main distinction; Simultaneously for preventing liquid from hurting sb.'s feelings from die joint leakage, liquid-proof splash barricade has been set up in die periphery.Directly be fixed on the inner slide of double action hydraulic press by punch during installation, holding pad is arranged on outer slide by backing plate.Again die directly fixing on the table, be then used for drawing forming process (as Fig. 2) by two actions of hydraulic press.

Before drawing, first in die cavity, fill lubricating fluid.In hydraulic pressure drawing process, when punch declines and is pressed into die, most of lubricating fluid stays pressurized in die cavity, and the pressure maintaining effect being simultaneously subject to external hydraulic equipment becomes highly pressurised liquid.The reaction of highly pressurised liquid makes plate overlaying tightly be shaped on convex mould surface.Another small amount of liquids simultaneously in die cavity is then extruded from the gap between panel surface and die, thus plate and molding surface are disengaged, create the condition that realizes forced feed lubrication under fabulous pressure, decrease the slip between plate and die and friction, reduce limit drawing coefficient, and improve limit reduction significantly, a drawing can be shaped.

In drawing process, the liquid overflowed because being squeezed is recycled to and unlikelyly in the water leg of surrounding flows to mold exterior.The sidewall of water leg also plays safety protection function simultaneously, by the highly pressurised liquid gear of unexpected ejection inside mould, in case damage to staff.After drawing completes, when punch promotes, make lubricating fluid flow back into again in die cavity, have return port bottom water leg simultaneously, can by too much lubricating fluid recycling.The size of attentional manipulation pressure-pad-force is answered in drawing process.

First in liquid-filled chamber 9 (die 1), be full of liquid, put drawing blank, apply certain pressure-pad-force, punch is descending carries out drawing, starts the pressure that hydraulic pump makes liquid keep certain, until drawing terminates simultaneously, then lift punch, blank holder, take out formation of parts.

The principle principle of plate hydroforming is as follows:

Replace rigid matrix with liquid medium and carry out transmitted load, when punch is descending by the liquid of blank crush seal in concave die cavity, due to the Incoercibility of liquid medium, cause under being kept the effect of effect in friction by the liquid that compresses, make blank be fitted in the outer surface of punch tightly, and finally make blank completely by punch shape formable along with punch is descending.The friction that hydraulic action in this shaping defines between blank and punch keeps effect, improves the bearing capacity of punch-nose angle district plate, and suppression blank is thinning and ftracture, and effectively can improve forming limit, reduce shaping number of times.Meanwhile, liquid, from overflowing between blank and die upper surface and can forming fluid lubrication, promotes that peripheral sheet material successfully enters die, thus successfully can alleviate the scuffing of piece surface.Its technical process as shown in Figure 3.

Mold materials: punch, die, holding pad all adopt alloy QT600, surface hardening 50-55.

Shaped by fluid pressure control system: in hydroforming process, the pressure setting of hydraulic system, control and sealing are larger for the impact of sheet forming, and have a lot of combination between each parameter, add hydraulic system in shaping instantaneously to the impact of mould, vibration etc. also has a great impact the shaping of plate, therefore to a kind of sheet forming of part, its each parameter is established a capital more difficult really.In order to obtain this part hydroforming process in the setting workshop debugging of hydraulic system each parameter time adopt the way of repetition test.Finally debug out qualified part.Oil sump shaped by fluid pressure control system is divided into electric cabinet, pumping plant, and hydraulic function block etc. three part forms.Electric cabinet and pumping plant is integrated is fitted together, hydraulic function block is arranged on die.The position feedback of punch is inputed to the PLC in control cabinet by the position sensor be arranged on press, the hydraulic control system of concave die cavity has the Real Time Control Function of pressure.

Typical problem citing in Design of Dies:

The processing problems of oil pipeline, present petroleum pipeline diameter is 16.5mm, and working depth is at least 345mm, and will there be good sealing joint simultaneously.The lowest part of oil sump is originally in contrary position, and working depth is more than 450mm, and designer reduces working depth by the lowest part position exchanging oil sump, and makes it process to have feasibility.Because of fuel transfer system reason, bore dia can not be changed, and adopts staged boring to increase drilling depth.

The strength problem of mould, because hydraulic pressure drawing die pressure is too large, this just requires that mould itself has good intensity.According to evaluation requirement, designer is according to calculating and being gained in strength by employing wall thickness, and the wall thickness around concave die cavity reaches more than 100mm.

Liquid safety problem under pressure, because under High Pressure, liquid may splash and to damage staff.Designer avoids highly pressurised liquid to splash by the height increasing barricade around as far as possible.

The utility model beneficial effect is as follows:

A. productivity effect:

(1) utilize hydraulic pressure draw forming oil sump only to need making simple concave die cavity, this just will make one than ever and even have the die saving of labor of complex-shaped surface mould, laborsaving, material-saving more, and cost significantly reduces.Mould design and manufacturing and punch machining process are obtained for simplification, shorten the moulding cycle, and hydraulic pressure drawing makes drawing die not be the short slab affecting the Making mold duration.

(2) reduce die procedure content, corresponding minimizing number of molds, reduces costs, and shortens the cycle.If adopt conventional die design method, then must make 3 ~ 4 molds, could be shaped by repeatedly drawing, sometimes directly cannot be shaped, and hydroforming only need one set of die.

(3) parts quality is high, and yield rate improves, the favor of easier Win Clients; Not exclusively contact between product with die, the relative sliding between it and friction greatly reduce, and are conducive to the quality and the yield rate that improve product.

(4) concave die cavity is simple, and manufacture craft is simple, reduces cost of manufacture.

B. economic benefit:

EP6 engine be DPCA 1.8L (containing 1.8L) following engine from now at main force's engine in market, China's Mainland, be the upgrading products of the following engine of alternative existing 1.8L (containing 1.8L).Improve oil sump R & D Level, promoting production capacity is that stamping company car product increases new profit growth point.

The annual production conservative estimation of EP6 oil sump is annual production 300000.The single-piece price evaluation of present oil sump is at about 180 yuan, and net profit margin is approximately 15% ~ 30%, and conservative like this year net profit=300000 × 180 × 15%=8100000 is first, namely 8,100,000 yuan.

Due to Citreen company and Chang'an company joint, may 400,000 be reached from the annual requirement to this oil sump in 2014.Estimate that this EP6 oil sump can be very good in the market of China's Mainland, ensuing annual production conservative estimation may need to reach 600,000.If the service life of EP6 oil sump is 10 years, so:

First Year is because the reason such as die cost, production time, and annual earnings are estimated as 100,000 yuan.Income=10+600000 × 180 × 15% × ten thousand yuan, (10-1)=14590 of this oil sump, i.e. the income that is 145,900,000 yuan of this project acquisition.

Claims (1)

1. a two hydrodynamic pressure drawing die, the punch (3) comprising fixing die (1) on the table and be fixed on the inner slide of double action hydraulic press, is characterized in that: also comprise the holding pad (2) be arranged on by backing plate on double action hydraulic press outer slide; Described punch (3) is connected with die (1) through holding pad (2); The upper surface of described die (1) is also provided with liquid-proof splash barricade (6), be provided with liquid-filled chamber (9) and hydraulic tube (5) in die (1), described liquid-filled chamber (9) is connected with external hydraulic control system infusion port by hydraulic tube (5).