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Mold guide pins and bushings and hole design and calculation of accuracy


Guide sets) the theoretical accuracy of hole location and design allowable values ​​of deviations based pillar (guide sleeve) hole deviation of the accuracy of the theory to allow the value T, from equation (7) ( f9) have T = T ... = T_l = √ e r ... ... - (10) from (10) can be calculated pillar (guide sleeve) hole location accuracy design value hx. I-Ay = hx:. T = 0 ... 2SAx = T / √ 2 = 0.707T ... ... ... (1lJ type (10) and (11) is the pillar mold (guide sleeve) hole location accuracy to allow the value of the theory and design of Peter illustrates value the relationship. 3. I. column (guide sleeve) hole location accuracy to allow the value of the theoretical bias 4O calculation is based location of the theoretical value of tolerance calculation and design. theoretical values ​​as appropriate to allow significant deviation with the path for short. So pillar (guide sleeve) hole location accuracy deviation allowable value of ship missile, which is the location of Tolerance (bad taste back in diameter) of the theoretical value. dynamic model mold guide post on the cabinet, in the free skating man-template larvae L kit guide on the process, when the pillar diameter is large photo limit size (d ...) and lead kit larvae at the minimum limit of size I (D ~),ed hardy zürich, can guarantee the freedom of assembly of the guide post (Introduction sets) larvae [position tolerance of the theoretical value (note that this value is different from the design value,mulberry sverige, not directly on the design drawings in the mold.) is calculated as follows: T ≤ kZ ... ... ... (12) where a pillar z and the guide sleeve with Taiwan,ed hardy shop, the gap between the minimum gap and a tie j k rejection coefficient k = 1z = Dj Pan d a d a pillar of the camera kit large diameter D-hole lead since the minimum diameter of specialized plastic mold frame fixed in plastic injection molding machine, there is a precise positioning, does not require adjustment of the fixed link.. a ≤ kZ ≤ 1 × (D-d) ≤ D-d ... ... ... ... (13) by (11) and (13) have : mold pillar (guide sleeve) hole location tolerance (tolerance zone diameter) of the design value is: Ax = 0.707T = 0.707 (D-dm) ... ... ... ... ... ... ... ... (14) calculated pillar (guide sleeve) Hole Position Tolerance design value,abercrombie fitch uk, according to national standards (1GBll84-8O) provides the location coefficient, used in mold design drawings marked the location on the degree of tolerance (△ x standard) is equal to or smaller in equation (14) the design value, that is: Ax <hx ... ... ... (15J (13) (14) (15) is the author summed up the lead frame design chess column (guide sleeve) the specific hole position accuracy give the formula l Bi: Known: Guidelines for the minimum diameter of the hole kit 20.007 pillar of the maximum diameter of l9.989 () request column (wide open sets) hole grounds occupied by the enemy ships tolerance value of T, Mould Industry 1989 . No.8 think 102 by (13) was: T ≤ Di a d ≤ 2O.O07 a l9.98O ≤ 0.027ram (b) derivative column (guide sleeve) Hole Position Tolerance of established Section flat basket tray Az: the type (14) was: △ x = 0.707T = 0.0l9mm small mold technology experience (blue) Find the mark on the design drawings in aid the location of floc tolerance △ x standard: According to equation (15), and access to national standards (GB1184 ~ 80) provides the location coefficient, the choice of analysis in the design of phoenix-like note on the guide columns (sets) hole location tolerance △ working standard = 0.015ram '△ x scale <△ x. .. positional Tolerance is reasonable. Simple composite blanking die bending free Qing Fujian Province Electric Porcelain Factory Li Jiarui I plant HK! cable clamp parts (Figure 1), the original is divided into blanking, bending two processes, small parts, bending process operation is inconvenient and inefficient. blanking die, which will now punch chamfer into the products directly to the corresponding size, a shape can achieve blanking, bending two processes combined to save a process, without increasing the complexity of blanking die level, equivalent to a simple blanking die. (see Figure 2) punched out of the part size is accurate, clearly imprinted bend, smooth and beautiful. With this simple method is also applied to the sides and round chamfering and bending angle is less than 60.'s products (see Figure 3). If the previous procedure for the composite blanking punching, compound die can be the appropriate place in the punch chamfer, that is, access to punching, blanking, bending of the three processes complex, simple shoe line. circle 1 Figure 21. Die handle 2. fixed plate 3. punch 4. stripper 5. Die 6. backplane Figure 3 support the film cut fillet die Ninghai coal electrical plant Chang Yu-side I plant the switch grab a blue to salmon (Figure 1), rounded at both ends of R1 processing more difficult, starting in the red bed, we used cold extrusion processing, the effect is to ignore one: think, if on the planer planing process, the efficiency is low, and the accuracy is also difficult to guarantee. was designed to cut a fillet die, by the use of more good results have been cutting tens of thousands of times, die County Industrial 1989.No.8 calyx 10241

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