冲压模具外文文献

1、Progressive die has the following advantages1) Class into the module is multi-process dies, in a mold can include punching, bending, forming and drawing a variety of multi-pass process, with a higher than the compound die labor productivity, but also can produce quite complex stampings;2) Progressiv

2、e Die Operation Security, because staff do not have to enter the danger zone;3) Class Progressive Die Design, The process can be distributed. Do not focus on one station , there is no CompoundDies "Minimum wall thickness" problem. Therefore relatively high mold strength, longer life expect

3、ancy.4) Progressive Die Easy Automation That is easy to Automatic feeding ,Autoout of parts Automatic lamination;5) Class Progressive die can be High-speed press production, because the workpiece can be directly down the drain and waste;6) Use Class Progressive die can be Reduce the presses, semi-fi

4、nished products to reduce transport. Workshop area and storage space can be greatly reduced.Progressive Dies The disadvantage is that complex structure, manufacturing of high precision, long life cycle and high costs. Because of progressive die is a To the workpiece, the shape of successive out, eac

5、h punch has a positioning error, is more difficult to maintain stability in the workpiece, the relative position of the one-off appearance. However, high precision parts, not all contours of all, the shape relative position requirements are high, you can be washed in the shape of the samestation, on

6、 the relative position of demanding the same time, out of this part of the profile, thus ensuring precision parts.First, process pieces of carry approachProcesses and the determination of nesting is of the progressive die design a very important link. In considering the processes and nesting, we mus

7、t first consider the process method of carriage parts.Bending parts there are two main ways to carry:1) Blanking station in the upper and lower pressure, so that after blanking process pieces and re-pressed into the material inside. Generally only about access to material thickness of thel/3, but ha

8、s enough to process pieces with the material sent to the next process, within the workpiece in the working procedure have all been pressed into the material inside the remnant. Beyond that, after process pieces are washed curved shape, until the last escape from the Strip. The drop in this way conve

9、ying pairs of thick material is very effective, because the thin material easy to bagging, wrinkles, or bent, thus blanking out the flat blank song, not with the advance of material and stops in a stationcaused the accident.Simple blanking progressive die, sometimes in order to ensure that the workp

10、iece is flat andhas also taken off after the re-feed materials putpressure on people within the approach, in the latter process to workpiece pushed. Because blanking after being re-pressed into the workpiece can not be material in the thickness direction all entered the hole, so in the blanking die

11、station after the plane, to the corresponding lower.2) Rush to need to bend someof the surrounding material, the rest of the parts remain in the article (Volume)Materials, there is no separation.As the hub of to the material, You may need to spend a long Progress in distance delivery.Second, the pri

12、nciple of work arrangements1) Blanking the workpiece to avoid the use of complex shapes convex mode. Rather more than the increase a process to simplify the convex modeshapes.2) "U"-shaped pieces can be divided into two out, as Figure7-76As shown in order to avoid material stretched, out o

13、f Workpiece dimensions vary.Figure7-76 U shaped pieces of curved process3) In the asymmetric bending, the workpiece slide easily can be shown inFigure7 77shownwith teeth inserts were inserts into the bend ConvexMold and roof in order to prevent the workpiece sliding. The main disadvantage of this me

14、thod is the a)After the procedure b)pre-process workpiece plane with prints. Also available on the heat treatment before Convex Mold and roof pre-perforated, after tryout after the sheet metal through the tryout will be two holes without sliding inlay Ping . If sliding is used tooth inserts.Figure7-

15、77 To prevent the sheet metal bending generated when sliding1- Bending Convex Die 2- Cut off Convex Die 3- Roof 4- With teeth inserts4) Bending or deep drawing of the workpiece, high-quality plastic surgery procedures should be added.5) Waste, such as continuous, should increase the cutting process,

16、 using waste cutter cut. Automatic press itself, as some waste cutter, you do not have to die to consider.6) Canbe countersunk head hole punching. Figure7 78 shows the first hole punching of the workpiece . Whenclamping the punch die Xiaoping Tou both plane and concave hole stretch of artificial par

17、ts, and contact with each other in order to prevent inward deformation of holes. Clamping direction due to the strict size requirements, so the punch assembly when subject to a high degree of repair potential. Also can be used as shown in Figure 7-79 height adjustment body punch. The upper punch 3 f

18、ace, contact withthe slider 2. Slider right-hand side has opened a T-shaped slot to accommodate the screw 5 in the head. Rotating screw 5, then move along the slider 2. As the slider 2 and the mold base 4 in order to ramp contact with each other, while the punch 3 in the fixed plate is sliding in wi

19、th l, consequent punch in the direction of the location of mold can be adjusted. Adjusted with the nut 6 fixedFigure7-78 Stamp shen head hole1Convex Die 2- DieFigure7-79 Punch height adjustment body1- Fixed Plate 2-Slider 3- Punch 4- On the mold base 5- Screw6- Nut7) There are strict requirements of

20、 local relative position within the shape, should consider the possibility of the same station on the out, in order to maintain accuracy. If there are really difficult to be broken down into two working bits. Be better placed in two adjacent stations.Third, the principle of stamping operations seque

21、ncing1) For pure blanking progressive dies, in principle, the first ,punch, followed by re-punching shape I expected, the final and then washed down from the Strip on the integrity of the workpiece. Carrier should be maintained of material of sufficient strength, can be accurate when sent to press.2

22、) For the blanking bending progressive die should be washed before cutoff part of the hole and bend the shape I expected, and then bending, and finally washed near the curved edge holes and the side hole-bit accuracy of the sidewall holes. Washed down by the final separation of parts.3) Drawing for

23、the progressive die stamping , first make arrangement to cut processes, further drawing, the final washed down from the article on the workpiece material.4) For with the deep drawing, bending stamping parts, the first drawing, then I punched the surrounding material, followed by bending plus.5) For

24、stamping with a stamping parts, in order to facilitate the metal flow and reduce the stamping force, stamping parts of neighboring I expected to be an appropriate resection, and then arrange stamping. The final re -Precision Die-Cut materials .If there are holes on the embossing position, in princip

25、le, should be embossed after the punching.6) For with the stamping, bending and stamping workpiece, in principle,is the first imprint ,And then punching Yu Liu, And then bending process. Fourth, nesting layout1) Nesting mapping, you can start with plane launch fig start, right designed to blanking s

26、tation, left the design forming station. Step by step according to the actual situation after the amendment.2) Consider increasing the intensity to be an empty station molds.Continuous drawing more frequently when the first drawing after being a backup space industry in order to increase the number of drawing. High precision, complex shape of the workpiece should be less to set an empty station. Step away from the mold is