Shanghai Daoqin Plastics Co., Ltd.

        1, generally 先裁边,冲导 positive,打预断, pressure 线,打凸点,撕口,(切口, tensile), rear 冲孔落 material, pressure flash/burrs, formed 形, separation 两步折弯,先 formed semi, rear formed 形另一 semi.

        2, in 冲孔落 material 时, generally small 孔, rear large 孔;先冲落 formed 形周边 waste material, again its it 部位 余 material:因為冲 small 孔若放 in rear 面, that it in 冲裁时,冲子四周 for material belt/tape upper can can has 缺口(front already 冲 孔), this 样,冲子 in pressure process in, will 会引起受 force 不均(会產生侧 toward force),本 small 孔冲子 strong/high degree very low, add force 不均,极容 easy 折断,当然 this is large more 数情况, has according to 实际情况 need, small 孔冲隻 can in rear 面,不 办 method also is has, if thick degree in small, can 入行补 strong/high:A:採 use sheet/plate precision toward;B:冲子採 use PG(optical abrasion) processing.

        3, is using/adopting 裁边:

        裁边 generally use in 连续模 and material upper, it function coarse 定位, in mold trial 时便于送 material; has also has outer function, if mold 先冲定位针孔,接著马 upper use 引导针导 positive, generally use 裁边;没 has 引导针, need 先裁边, use 定距, generally use in 落毛胚 落 material in.

        裁边 冲子形状 has below/following types ﹕

        a: this type of commonly used material and thick 材裁边 in,定位精 degree low, it long =步距, wide need 保証冲子 strong/high degree can,常取3.0~6.0

        b: this type of 冲子头部 has 一 3/4 圆弧(R常取0.3~0.6), it long <=步距,目 裁边 waste material in 裡面, anti 止跳屑, commonly used thin high speed mold

        c; this type of 冲子同B一样, is it 变羿, its in V形 function use 卡隹裁边 waste material anti 止翻转跳屑, it degree 為50°~70°

        d: this type of 冲子既裁边 also outer 形.

         this type of 台阶头部目 起导 toward function, decrease/reduce toward force.

        4, 预断, will need 断,但未断 意思(generally in front 面)

        由於 small electronics product has electroplating requirements,為 electroplating 方便,冲出 small product 并不直接落 material,而 is 打 预断留 in material belt/tape upper, electroplating rear, again use or machine 械折两 lower can lower.预断:两面都 need 切,每边切进 deep generally material thick degree 4/1, this 样隻需折两 lower (往 upper -往 lower)就 can product lower;预断冲子 and 入子头部 wide degree 為0.02~0.05,角 degree 50°~70°, its long degree ratio 预断线 long degree large 0.2~0.5即 can.

        说明:為 便於 processing and material and 校模, generally 每 厂 各 block sheet/plate thick degree 实行 标準化, thick degree large small 都规定 (特殊情况 remove outer), in 连续模 in is material belt/tape 形式,為 方便 control material belt/tape pressure amount and sheet/plate balanced property,常 in material sheet/plate in abrasion material belt/tape 槽: its deep degree =材 material thick degree -0.03~0.05(也就 is pressure amount 為3~5 strip/profile),槽 wide degree ratio material belt/tape wide degree large 2~4mm即 can. therefore material sheet/plate thick degree 常随材 material thick degree 变化而变化, its large small =脱 material sheet/plate thick degree +材 material thick degree -0.03~0.05不 in engineering in, generally abrasion product 槽:因為 engineering product generally relatively large 而不像连续模 material belt/tape that narrow fine long,也就 is engineering material sheet/plate thick degree generally 不变.

        5, positive large small and 位置

         generally 连续模都 need positive,以便 rear 工序 精确定位, in engineering in commonly used product parts upper inner or outer achieve lower 一工序 定位,若既无 inner 孔, outer also can use 定位, that 麼隻 借助 process 孔:如第一 engineering 打凸胞,第二 engineering outer this type of 情况, that good in engineering in in outer for meanwhile process 孔(孔 large small and material thick degree has 关: commonly used?3.0~6.0)以便 lower 一工序 定位 high speed pressure mold design Knowledge

        第一步:產 product 图 公差 shrink shrink principle:

         due to product 冲出 之 rear,总 is micro small flash/burrs: its inner generally small, outer generally large,至于 flash/burrs large small, and 冲裁间隙 and 冲子,刀口 锋利程 degree has 关:冲裁间隙越 large, flash/burrs large,冲子,刀口钝化 rear, flash/burrs increase large,故冲子,刀口冲 一定 time rear,常常 need will abrasion 0.3~1.0, its flash/burrs to large how much and material thick degree has 关: generally thin 材(T<=0.5) di large 0.01~0.02, thick 材(T>0.5) large 0.01~0.05

        第二步:產 product dimensions 展开

        展开 principle: utilizing 体积不变 原则: use certain 一截面 总面积 remove material thick degree can to direction long degree, its 实展开就 is dimensions 也因各人 experience 而羿,没 has for 一 数 value, need in scope/range can.

        展开 key points: steps lower

        1:看懂產 product 图,想象出 it 立体形状以 and detailed fine 节 形状(展开 front basic requirements)

        2:弄清楚產 product thick and 材质

        3: specific 展开计算

        ① use method (generally combined has thin bending)

        ②开计算公式 due to product in bending process in has by long or pressure shrink can to certain bending long degree is 不变, this 一不变 层叫 in 心层(不 is in 间层),我们就 is utilizing in 心层 进行展开; therefore,我们 need 想入行展开,就必 must in 心层,如图2设 in 心层系数為K, bending inner semi 径為r,材 material thick degree 為t, bending 角為a,L1,L2為直线部 separation long degree,展开 long degree value 為L,, that has L=L1+L2+2π(r+kt)a/360 in 心层系数K large small according to experience can lower 列公式选取

      ①当r/t<=0.50时 k=0.25

      ②当0.5<r/t<=1.0时 k=0.25~0.30

      ③.0<r/t<=2时 k=0.30~0.35

      ④.0<r/t<=4时 k=0.35~0.40

      ⑤当r/t>4.0时 k=0.40~0.50

        此公式适 combined 一切材 material thick degree bending 展开计算, specific in application in,当R/t取 upper 限时, K也应取 upper value,如当R/t=1.0时,K=0.30

        4:当包圆时,此时展开计算公式 already and upper 面不一样,因為包圆时, inner to pressure, outer by tensile,但挤 pressure large tensile, therefore material thin very small, or 者几乎不变, in property 层接近 in its long degree in 心层K and material thick degree and inner r has 关

      ①当r/t<=3.0时, in 心层系数K=0.45~0.55

      ②.0<r/t<=6.0时, in 心层系数K=0.55~0.65

      ③.0<r/t<=15.0时, in 心层系数K=0.65~0.70

      ④当15.0<r/t<=30.0时, in 心层系数K=0.70~0.50

      ⑤/t>30.0时, in 心层系数K=0.50.

        5: through table/sheet,找出 in 心层系数 large small, again 进行展开计算也行, in as detailed 叙述

        6:產 product 圆角处理:產 product upper generally maintain it,但若 is 尖角,当t<=0.5时, generally use most small 圆角R0.15 拟化 it;当t>0.5时, use most small 圆角R0.2~0.3 拟化 it, for/regarding product upper R0.1 圆角,尽 amount use R0.15 代替; for/regarding R<0.1 圆角 or 清角, if is important dimensions (改变会 effect/influence function)则不变 it,採 use 切 达 to requirements.

        第三步: material belt/tape design

        排样 principle:一根 material belt/tape 经 冲孔落 material pressure flash/burrs tensile bending formed 形各 工序, most rear formed product process,现 in how to this 工步:哪 in front,哪 in rear,总共 need how much 工步,各工序 between versus 调协, make its front rear, combined combined 理排样 design: steps lower

        1:确定產 product dimensions rear, according to product flash/burrs direction,确定冲裁 and formed direction,无 flash/burrs requirements generally 不受限 made;若產 product upper has flash/burrs requirements 时, this 时一定 need attention/notes it and formed direction: toward lower also is toward lower formed 形)冲孔 flash/burrs in 刀口面,落 material flash/burrs in 冲子面: generally machine outer housing/shell type parts use and safety property can requirements, its flash/burrs need in product 里边(formed inner 边) if upper has flash/burrs requirements 时,则 need requirements 做,没写 flash/burrs requirements amount let flash/burrs in 裡边,若 formed more 方便,也 can in outer 边.

        2: based on product dimensions, coarse 畋估算步距(PITCH=產 product direction most large long degree +1.0~2.0- in has belt/tape remove outer) use ARRAY命令 as 出横排,纵排, for 称排,交错排,斜排(very less use)几 types solution/scheme,进行 analysis, comparison, comprehensive, in 保証產 product 顺利生產出 front lower, selection most solution/scheme. specific attention/notes below/following 几点:

        ①第一 need this formed is easy and stability, rear 一工步 is for front 一工步 already formed good 產生破 bad function, or rear 一工步无 method formed 形,冲子 and 渗透子 strong/high degree is 否足够

        ②· need material belt/tape in mold in can 否顺利送 material, front 一工步 formed rear can 否继续平稳送 to lower 一工步包括考虑浮 rise high degree and belt/tape and strong/high degree rise high degree low good, generally lower sheet/plate thick degree 1/2:因為太 high easy 引起摆动, material belt/tape 定位不淮 and deformation;连接 belt/tape (also 叫载体-CARRY) has below/following types 形式:

        1>:无连接 belt/tape, waste material 排样, parts outer 形往往 tool has for property and property, usually use mono PIN切断落 material or di PIN一 落 material 一 切断,

        2>:边 material belt/tape, is utilizing strip/profile material waste material as 為载体 一 types 形式, this type of 载体传送 material belt/tape strong/high degree relatively good, simple, main/primary use material type in,

        3>: mono belt/tape, is in product strip/profile material 一侧留出一定 wide degree material,并 in 适当位置 and product versus 连接, achieve for product strip/profile material 运送, generally combined type 排样,

        4>: di belt/tape, is in product strip/profile material separation 别留出一定 wide degree material,并 in 适当位置 and product versus 连接, achieve for product strip/profile material 运送, it ratio mono belt/tape more 顺利, material belt/tape 定位精 degree more high, it combined product 两端都 has can 连, especially combined material (t<=0.4) relatively thin 时, material belt/tape strong/high degree relatively low 情况

        5>: in 心连接 belt/tape, and mono versus 似, is in product strip/profile material in 间留出一定 wide degree material,并 and product front rear versus it ratio front 者节省材 material, in bending parts in application relatively more;因為导 positive in in 间常引起拉 material,故常需 in 引导针 in 间交错 add elastic property material 定位针,连接 belt/tape summary lower:

        產 product 展开之 rear,仔 fine analysis product 各 部位, which need formed 形, which is 仅仅落 material,然 rear in material selection 恰当 位置引出连接 belt/tape, make can material belt/tape 平稳运送, also effect/influence product formed 形;至於 selection type type belt/tape, need according to product features 而定. 确定產 product dimensions rear, according to product flash/burrs direction,确定冲裁 and formed direction,无 flash/burrs requirements

        第三当碰 to L形 bending or product mono 排时材 material utilizing rate low, can for 称排交错排, this for formed force uniform, formed stability; or material utilizing rate can large large improve/increase

        第四 need 考虑冲裁PIN数 and 步距(main/primary for parts type small 端子產 product, generally outer housing/shell type or relatively large parts mono PIN).

        第五 need 考虑材 material utilizing rate,尽 can can improve/increase material utilizing rate, reduce cost.

        3:确定排样 solution/scheme rear, this 时应该 for 整 產 product pressure and formed process has basic 认识, how to this 工序 先 rear 关系,应做 to in has 数:即先冲哪里, rear 冲哪里,先 formed 形哪步, rear formed 形哪步,以 and certain formed 形工序 can one-time formed also is separation 两步导 positive large small selection in front table/sheet already 经说明, its generally in belt/tape upper, has in waste material upper to most rear waste material 一起冲掉; generally 一 步距一 导 positive or 几PIN several positive 孔.

        6, 冲子刀口 design made as

        冲子刀口: for 於连续模,就 is material belt/tape upper waste material separation 冲掉,留 lower product outer and belt/tape; for engineering 模, generally 讲,就 is 冲孔落 material. lower main/primary for 连续模 讲. use product 展开图排出 material belt/tape formed solution/scheme rear,接 lower is how to this 工步, generally 先打凸点,打预断,冲导 positive,撕口,落 material, again pressure flash/burrs, formed 形.由於產 product 形状常常奇形怪状, its 展开图形状也必然不规则: can can has has very deep 狭槽, if outer material 冲子做 formed overall, that in 该冲子部位 can can 常常发生崩柝; can can has has very long 悬壁, that in 该部位 刀口 strong/high degree 肯定不够; has requirements is 尖角,事实 upper 刀口冲子割出 不 can can is separation 之百 尖角,总存 in most small R value (usually is R0.15); also has is maintain rear 一工步 formed stability property (increase large pressure material 面积),而先切 一部 separation, formed rear, again 切另一部 separation therefore,為 solution upper issues,就必 must 进行刀口 separation understanding, that thin low mono separation 离出 做 formed different 刀口, use 2 or 2 above 工步先 rear 互切 完 formed overall outer material, separation understanding attention/notes below/following 几点﹕

        ① for/regarding product upper requirements must is 尖角 部 separation,此时必 must 采刀口互切

        ② for/regarding product upper certain strip/profile 轮廓直线边 has relatively 严 公差 requirements (<=%%P0.05)时, generally in 该直线 upper has 刀口接头

        ③ separation understanding 出 冲子形状 simple,尽 amount using/adopting 普通研 abrasion or processing

        ④ separation understanding 出 冲子 need has strong/high degree,尽 amount decrease/reduce PG processing,如 has 空 方,尽 amount large 一点

        ⑤ for/regarding 互切刀口採 use versus 交(generally is and or and 圆弧) or 圆弧60~75%%D处 as versus 交 互切 methods (直线 and 圆弧), has 时也採 use versus 切(圆弧 and 圆弧) or heavy combined versus 切, its 互切直线 long degree (generally 0.3~0.5不包括两者圆弧)不宜 long, long 会產生 powder 屑: its is need large 毛头, effect/influence product dimensions and 美看

        ⑥ attention/notes 刀口冲子 upper 圆角处理: usually 线割min圆角為R0.15,也 can 割R0.1 圆角但 need copper filament (cost increase),故不 important 圆角尽 amount it to R0.15, or more large R0.2~0.3,但 is can it function dimensions 改变: its 刀口冲子 upper 圆角必 must table/sheet or add 说明未注圆角R為 how much,至于脱 sheet/plate sheet/plate 转角处圆角既 can 画清角,也 can and 刀口一样, it 仅仅起定位 function,线割时, it 会自动清角. for/regarding small R0.1 圆角 using/adopting PG processing.

        7, 刀口镶 block (usually 鸣入子) large small design made as:

        ①做入子 目: its main/primary is repair:由於 many precision parts large has flash/burrs requirements,不 ultra- its value,而 mold in pressure time rear,冲子 and 刀口因经常互 versus abrasion scratch 刃口发生钝化,变 不锋利,导致 flash/burrs add large. if 做入子,发现哪裡 flash/burrs large 隻需 该处冲子刀口折 lower in abrasion 0.2~0.5, again in its 背面垫 upper versus thick degree sheet/slice can. if 不做入子, that 麼整 模 sheet/plate need lower, again in 刀口面 abrasion high degree, this repair comparison 麻烦且 reduce mold lifespan; another in 连续模 and engineering in, that easy 崩裂 刀口 and product upper certain dimensions requirements very 严时, can in 该处做入子, this 样方便 repair.不,并不 is has mold 做渗透子,因為一做入子, mold cost, will increase 1.5~3倍, therefore specific also need product requirements degree and 生產批 amount and mold type type. lower brief need need 做入子 情况:

        1> high speed precision mold (冲 speed >150次/每 separation 鐘,如端子模)脱 sheet/plate lower generally need 做渗入渗出子,夹 sheet/plate can can 不做发,建义(from cost 出发):不做

        2>普通连续模: if 生產批 amount relatively large 时, lower generally need 入子, its it sheet/plate 不做入子;生產批 amount relatively small 时, lower can 不做入子; if product upper certain dimensions requirements 经常变动 or or very difficult and easy 崩裂 刀口部位, can in design 入子

        3> engineering 模: generally 不做入子,隻 has in that easy 崩裂 刀口部位才 design 入子

        ②刀口镶 block (入子) large small made as, main/primary pressure material thick degree and hardness and 刀口材 material strong/high degree 决定,入子做 太 large,步距排 relatively 鬆, this add long sheet/plate, meanwhile for sheet/plate strong/high degree has effect/influence,做 太 small,刀口 strong/high degree also 不够, therefore need to 恰当 数 value,既不浪费模 sheet/plate also 保証渗透子 strong/high degree:实践証明 generally made as 时,刀口 most large outer dimensions again outer 偏3~6mm,适当取整数就 can to 刀口渗入渗出子 large small: for/regarding thin 材(T<=0.5),刀口常偏3~4mm;建义:取4mm為佳; thick 材(T>0.5),刀口常偏4~6mm,建义:取5.0

        1>模 sheet/plate commonly used material:夹 sheet/plate 渗入渗出子 commonly used SKD11,脱 sheet/plate commonly used SKD11 or SKH9(SKH9 ratio SKD11 need good), lower 模入子 commonly used SKD11 or SKH9,当 large amount precision fine small parts 时(如端子)也 can use di structure 钨钢WC形式(刀口為WC常取4~8mm,垫 block 為SKD11, its thick degree = lower thick degree - upper 层刀口 thick degree) ﹐注:冲子材 material commonly used:SKD11,SKH9,当冲子 small 时(如PG)也 can use WC.

        2> lower 模入子 and sheet/plate 渗透子為 anti 止装反,常进行倒C角处理:C角 large small 常取C1.0~3.0,脱 sheet/plate 入子由於 has 吊耳存 in, can anti 止装反, generally 不倒C角; formed 形冲子 has or pressure sheet/plate 槽 存 in,也 can anti 止装反,故常不倒C角, formed 形入子 can 倒C角

        注:倒不倒C角,并没严格 requirements,由 design 人员习惯决定,不 for that easy 误认為 for 称而实际不 for parts must 倒C角处理

        3>模 sheet/plate in 线割时, generally 先打一穿线孔才 can 线割, therefore in sheet/plate frame and 入子时 need in 冲子刀口封闭线 inner 画一?0.6~1.5穿线孔标识符﹐ function has 两:

        A>: this 一穿线孔位置 can 供线切割参考: combined 理 话, processing 人员就 in 该位置打出穿线孔,不 combined 理, processing 人员不一定 in 该处打穿线孔

        B>:另一 function design and 组模人员检验 and inner and outer between versus for 位置关系以便发现错误,至於 this 一孔打 in that 位置,由刀口 large small 而定: if 冲子刀口 most small wide degree dimensions >10mm, that in inner 孔边缘线5mm任一处打一穿线孔标识符 decrease/reduce 线割面积,节约 cost; if <10mm就 in inner long wide most large 处打一穿线孔标识符,尽 amount use 钻床钻出穿线孔常為%%C3, if most small wide degree dimensions 均<4mm, commonly used machine (同放 electrical principle same)打出穿线孔; if <0.3, its 刀口常採 use 镶拼式组 combined formed

        4>模 sheet/plate between setting:两入子 between 距离既不 can large can small,太 large 工站排 鬆 dispersion add long sheet/plate dimensions, increase material cost;太 small sheet/plate strong/high degree decrease low, reduce mold lifespan, usually 两入子(包括 formed 形入子) between 距离至 less need >1.5,如 less 於1.5: need 麼割通两入子连 in 一起, need this 一工站排 to lower 一工站; has also need material belt/tape by 抬起 平稳 property 该位置 has necessary 安装导 positive rise or material or rise block 时而该处 has has 位置:如没位置, this 一工站同样 need to lower 一工站

        5>模 sheet/plate 冲子刀口入子 processing 间隙 确定:

        a: hard and 碎材:冲子 and between mono 边间隙 generally material thick degree 5~7%,常取5%﹐如不锈钢SUS304-1/2H,3/4H

        b: soft 材:冲子 and between mono 边间隙 generally material thick degree 3~5%,常取4%如黄 copper,磷 copper, aluminum 材,不锈钢301

        c: for pressure material thick degree <=0.2时, its 冲子刀口 mono 边间隙常取0.01,因為 again small to mold degree made

        d:间隙究竟放 in upper also is upper 呢?: for 於冲孔, generally 以凸模為基準,间隙放 in upper, for material, generally 以凹模為基準,间隙放 in upper; in 连续模 in generally is 冲

        產 product outer waste material separation, versus 当冲孔, therefore 间隙放 in upper, for mono 边切断 type, versus material, its 间隙放 in upper,不 this type of 形式,也 can 不放间隙; in 冲孔落 material clamping in, generally 凸凹模, inner outer use, therefore in 间隙回 issues, generally 以凹模(also 叫母模)為基準,凸模(also 叫公模) mono negative how much.至於 inner outer 脱, its generally 以公母模 versus combined.至於 this need need 画出 因各厂习惯而羿: has 厂不画出,冲子 and 刀口一样 large,隻 is in 刀口旁边 add understanding 说明如: lower 模入子: mono +0.01 T=25.0 SKD11 刀口 deep 2.0 below/following 斜1.0%%d落屑;而 has requirements 直接画出,隻 must 写刀口直线位落屑斜 degree 冲子: mono +0.0 L=50.5 SKD11 lower 模入子: mono +0.01 T=25.0SKD11 刀口 deep 2.0 below/following 斜1.0%%d落屑 inner outer use:以 outer 模為基准 inner mono 边-0.01公母模直线位各3.0

        B>:刀口直线位 and 落屑斜 degree:直线位 long and 落屑斜 degree small 时, easy 出现堵 material,直线位 short and 落屑斜 degree large, di low for strong/high degree, therefore has 一恰当 value,实践証明: for 於t<0.8 材 material,刀口直线位取2.0,落屑斜 degree 取1° relatively 佳;t>0.8时,刀口直线位取3.0,落屑斜 degree 取1°; for that low small 冲子,為 anti 止常断, its 刀口常採取直接割斜 degree 0.2°不留直线位且刀口常做 di structure, this decrease small force

        C>:入子(包括刀口入子, formed 形入子 and 冲子) inner outer 形间隙 确定

        由於 this or need 直接装入模 sheet/plate or 入子, therefore in need need issues,且 this 间隙放 in sheet/plate upper also is 渗透子 outer upper:為 画图 方便, generally 都习惯 间隙放 in sheet/plate upper, and this 间隙也不画出,隻 is in processing understanding 栏裡说明:如羿形孔, mono positive how much, has 冲子圆孔 need in add 代号, again in understanding 栏说明:如F:3-?4.00(冲子孔,割 mono +0.007), lower 面就夹 sheet/plate sheet/plate lower 模渗入渗出子间隙进行说明:

        a:夹 sheet/plate 仅仅起 solid 定冲子 or 渗入渗出子 function, therefore it 间隙取 relatively large, this 样便於 assembly, if sheet/plate 做入子,入子 outer and sheet/plate mono 边间隙 usually 取+0.005~0.01,不做入子,刀口冲子 and formed 形冲子 and sheet/plate mono 边间隙取+0.005~0.01.

        b:脱 sheet/plate toward and material function, therefore it 间隙取 relatively small, if sheet/plate 做渗入渗出子,渗透子 outer and sheet/plate mono 边间隙 usually 取+0.003~0.005,不做入子,刀口冲子 and formed 形冲子 and sheet/plate mono 边间隙取+0.003~0.005. if and between mono 边间隙>=0.02时,刀口冲子 and formed 形冲子 and sheet/plate mono 边间隙也 can 取+0.005~0.01不 必 must it 间隙<冲子 and 刀口 间隙.

        c: lower sheet/plate 為刀口 sheet/plate, in pressure process in,冲子 and 入子存 in abrasion scratch force, in separation 模冲子往 upper 走时, its 入子受 to types toward upper abrasion scratch force, has types toward upper trend,為 anti 止入子 belt/tape 出模面, its and sheet/plate mono 边间隙 usually 取0.0 紧配 combined,為 safety 起见, lower 模入子常常 also need pressure 隹:究竟 need need pressure and speed and material thick has 关,观情况而定.

        D>: lower 模渗入渗出子 need need pressure 隹: separation types 情况:

        a: for high speed mold (如端子模),当冲 speed separation 鐘>150次时, lower 模入子 in abrasion scratch property force function lower,极 easy 跳出模面, therefore mold commonly used material sheet/plate toward, meanwhile pressure 隹入子 function, if 入子不够 long, need certain direction long ultra- 导 material sheet/plate 底线0.5~1.0既 can, especially for that 镶拼式 or di 层式刀口,一定 need it pressure 隹,以 anti belt/tape 出模面.导 material sheet/plate pressure 不隹时, can use below/following types 形式:

        导 material sheet/plate pressure 隹 0.5~1.0, formed 形入子 generally use pressure; attention/notes material sheet/plate pressure 裁边入子 位置:裁边 目 is use coarse 定位, therefore material sheet/plate need pressure to 裁刀口 尾端线 between 间隙留0.02~0.04即 can