CN204035358U - A kind of electric switch web-roll core blanking and drawing punching hole composite die - Google Patents

A kind of electric switch web-roll core blanking and drawing punching hole composite die Download PDF

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CN204035358U
CN204035358U CN201420482219.5U CN201420482219U CN204035358U CN 204035358 U CN204035358 U CN 204035358U CN 201420482219 U CN201420482219 U CN 201420482219U CN 204035358 U CN204035358 U CN 204035358U
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die
blanking
mold
concave
plate
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单学军
唐玲凤
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Anhui Polytechnic University
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Anhui Polytechnic University
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Abstract

本实用新型涉及一种落料拉深冲孔复合模;包括固定在机架上的下模座,及由动力机构带动并通过导轨与下模座作竖直相对运动的上模座,及安装于下模座上方的落料凹模,及安装于落料凹模中央的下凹凸模,及安装于上模座上且与落料凹模和下凹凸模配合的上凹凸模,及与所述下凹凸模中心配合的冲孔凸模;所述上模座内安装有向下顶推工件的顶杆结构;所述下模座内安装有向上顶推工件的推杆机构;所述落料凹模上方通过卸料板螺钉安装有固定卸料板;所述上模座与下模座之间安装有滑动导柱;所述滑动导柱外围安装有滑动导套;本实用新型的落料拉深冲孔复合模,将落料拉深冲孔在一副模具上完成,在一定程度上使得零件精度更高、成本更低。

The utility model relates to a composite mold for blanking, deep drawing and punching; it includes a lower mold base fixed on a machine frame, an upper mold base driven by a power mechanism and making vertical relative movement with the lower mold base through a guide rail, and an installation The blanking die above the lower die base, the lower concave-convex die installed in the center of the blanking die, the upper concave-convex die installed on the upper die base and matched with the blanking die and the lower concave-convex die, and the The punching punch that is matched with the center of the lower concave and convex die; the ejector structure that pushes the workpiece downward is installed in the upper die seat; the push rod mechanism that pushes the workpiece upward is installed in the lower die seat; the blanking concave A fixed stripping plate is installed above the mold through the stripping plate screw; a sliding guide column is installed between the upper mold base and the lower mold base; a sliding guide sleeve is installed on the periphery of the sliding guide column; the blanking puller of the utility model The deep punching compound die completes the blanking, drawing and punching on a pair of dies, which to a certain extent makes the parts more accurate and lower in cost.

Description

一种电器开关网芯落料拉深冲孔复合模Blanking, drawing, punching and punching composite mold for electric switch net core

技术领域 technical field

本实用新型涉及一种机械加工模具,具体是加工电器开关网芯用的落料拉深冲孔复合模。  The utility model relates to a mechanical processing mould, in particular to a blanking, drawing, punching and punching composite mould, which is used for processing electrical switch net cores. the

背景技术 Background technique

电器开关网芯通常采用模具冲制,往往要使用两副模具分两次来完成,一副模具采用落料拉深复合模,另一副用来冲孔。为防止孔变形,先进行落料拉深,最后冲孔。落料拉深复合模,上模座的凹凸模固定板固定着竖直向下的凹凸模;下模座上固定着凸模固定板,它固定着与所述的凹凸相配的凸模,与凹凸模相配的凹模采用螺钉固定。工作时,上模座在动力机构带动下,通过与下模座之间设置的导柱导套结构上下运动,对水平经过模具的板料进行落料和拉深。另一副冲孔模,上模座凸模固定板固定着凸模,下模座固定着与凸模相配的凹模,通过人工把已完成的落料拉深制件放到凹模之上,完成一次冲孔。  Electrical switch mesh cores are usually punched by molds, and two sets of molds are often used to complete the process twice. One set of molds is a composite die for blanking and deep drawing, and the other set is used for punching. In order to prevent the hole from being deformed, the blanking and deep drawing are carried out first, and finally the hole is punched. The blanking and deep drawing compound mold, the concave-convex mold fixing plate of the upper mold base is fixed to the concave-convex mold vertically downward; the convex mold fixing plate is fixed on the lower mold base, and it is fixed. The die matching the concave and convex dies is fixed with screws. When working, driven by the power mechanism, the upper mold base moves up and down through the guide column and guide sleeve structure arranged between the lower mold base and blanks and draws the sheet metal passing through the mold horizontally. Another pair of punching dies, the punch fixing plate of the upper die base fixes the punch, the lower die base fixes the die matching the punch, and the completed blanking and drawing parts are placed on the die manually , complete a punching. the

上述模具的不足是:分两副模具完成对一个制件的冲制,模具数量较多,且占用冲压设备也多,生产率较低,由于定位有误差,导致精度不高,生产产本也比一次冲制要高。  The disadvantages of the above-mentioned molds are: two pairs of molds are used to complete the stamping of a workpiece, the number of molds is large, and the stamping equipment is also occupied, and the productivity is low. One punch should be high. the

实用新型内容 Utility model content

(一)要解决的技术问题  (1) Technical problems to be solved

本实用新型的目的是克服现有技术的不足,提供一种落料拉深冲孔的复合模,该模具应当具有产品质量好、生产率高、生产成本低的特点。  The purpose of the utility model is to overcome the deficiencies of the prior art and provide a composite mold for blanking, drawing, punching and punching. The mold should have the characteristics of good product quality, high productivity and low production cost. the

(二)技术方案  (2) Technical plan

本实用新型提出的技术方案是:一种电器开关网芯落料拉深冲孔复合模,包括固定在机架上的下模座,及由动力机构带动并通过导轨与下模座作竖直相对运动的上模座,及安装于下模座上方的落料凹模,及安装于落料凹模中央的下凹凸模,及安装于上模座上且与落料凹模和下凹凸模配合的上凹凸模,及与所述下凹凸模中心配合的冲孔凸模;所述上模座内安装有向下顶推工件的顶杆结构;所述下模座内安装有向上顶推工件的推杆机构;所述落料凹模上方通过卸料板螺钉安装有固定卸料板;所述上模座与下模座之间安装有滑动导柱;所述滑动导柱外围安装有滑动导套;  The technical solution proposed by the utility model is: a composite mold for blanking, deep drawing and punching of electrical switch net core, including a lower mold base fixed on the frame, driven by a power mechanism and vertically formed by the guide rail and the lower mold base. Relatively moving upper die base, and the blanking die installed above the lower die base, and the lower concave-convex die installed in the center of the blanking die base, and installed on the upper die base and connected with the blanking die and the lower concave-convex die The matching upper concave-convex mold, and the punching punch matched with the center of the lower concave-convex mold; the ejector structure for pushing the workpiece downward is installed in the upper mold base; the ejector rod structure for pushing the workpiece upward is installed in the lower mold base. Push rod mechanism; a fixed discharge plate is installed above the blanking die through a discharge plate screw; a sliding guide column is installed between the upper mold base and the lower mold base; a sliding guide column is installed on the periphery of the sliding guide column set;

所述推杆机构由下推板、托杆、推盘、弹簧、夹压板、锁紧螺母组成:所述托杆竖直放置,且其上端与下推板安装;所述托杆下端依次与推盘、弹簧、夹压板和锁紧螺母安装;  The push rod mechanism is composed of a lower push plate, a support rod, a push plate, a spring, a clamping plate, and a lock nut: the support rod is placed vertically, and its upper end is installed with the lower push plate; Installation of push plate, spring, clamping plate and lock nut;

所述顶杆结构由打杆、顶杆和上推板构成:所述顶杆与托杆中心线在同一直线上;所述顶杆下端与上推板安装,上端与打杆安装。  The ejector rod structure is composed of a driving rod, a ejector rod and an upper push plate: the center line of the ejector rod and the supporting rod is on the same straight line; the lower end of the ejector rod is installed with the upper push plate, and the upper end is installed with the driving rod. the

进一步地,所述冲孔凸模外围安装有冲孔凸模固定板;所述上凹凸模外围安装有上凹凸模固定板;所述冲孔凸模固定板后方安装有上垫板;所述上垫板上方安装有模柄;所述打杆贯穿模柄;所述模柄、上垫板、冲孔凸模固定板和上凹凸模固定板通过上螺栓和上圆柱销固定。  Further, a punching punch fixing plate is installed on the periphery of the punching punch; an upper concave-convex mold fixing plate is installed on the periphery of the upper concave-convex die; an upper backing plate is installed behind the punching punch fixing plate; Die handle; the punching rod runs through the die handle; the die handle, upper backing plate, punching punch fixing plate and upper concave-convex die fixing plate are fixed by upper bolts and upper cylindrical pins. the

进一步地,所述下凹凸模外围安装有下凹凸模固定板;所述下凹凸模固定板上方安装有垫板;所述下凹凸模固定板下方安装有下垫板;所述下垫板、下凹凸模固定板和下模座通过下圆柱销和下螺栓固定安装。  Further, a lower concave-convex mold fixing plate is installed on the periphery of the lower concave-convex mold; a backing plate is installed above the lower concave-convex mold fixing plate; a lower backing plate is installed below the lower concave-convex mold fixing plate; the lower backing plate, The lower concave and convex die fixing plate and the lower die base are fixedly installed by the lower cylindrical pin and the lower bolt. the

进一步地,所述托杆后端设置为双头螺柱;所述弹簧固定在双头螺柱 上,且双头螺柱中间开孔。  Further, the rear end of the support rod is set as a double-ended stud; the spring is fixed on the double-ended stud, and the middle of the double-ended stud has a hole. the

进一步地,所述落料凹模一侧安装有固定挡料销。  Further, a fixed stopper pin is installed on one side of the blanking die. the

(三)有益效果  (3) Beneficial effects

本实用新型与多次冲制相比较,其具有以下有益效果:本实用新型的落料拉深冲孔复合模,通过上模座上的上凹凸模和凸模以及下模座的凹模和下凹凸模,可以将制件一次完成,不但保证了制件的精度,加快了生产速度,节约了生产成本。  Compared with multiple punching, the utility model has the following beneficial effects: the blanking, drawing, punching and punching composite mold of the utility model can pass through the upper concave-convex mold and the convex mold on the upper mold base and the concave mold and the lower mold base. The lower concave and convex mold can complete the workpiece at one time, which not only ensures the accuracy of the workpiece, speeds up the production speed, but also saves the production cost. the

附图说明 Description of drawings

图1是本实用新型的主视结构示意图;  Fig. 1 is the main view structural representation of the utility model;

图2是图1下模座的俯视图;  Fig. 2 is the top view of Fig. 1 lower die holder;

图3是电器开关网芯的主视结构示意图。  Fig. 3 is a front structural schematic diagram of an electrical switch mesh core. the

1-上模座;2-上螺栓;3-上凹凸模;4-冲孔凸模固定板;5-上垫板;6-模柄;7-打杆;8-冲孔凸模;9-顶杆;10-上推板;11-上圆柱销;12-上凹凸模固定板13-固定卸料板;14-落料凹模;15-卸料板螺钉;16-衬板;17-下圆柱销;18-下凹凸模固定板;19-下垫板;20-下模座;21-推盘;22-弹簧;23-锁紧螺母;24-夹压板;25-双头螺柱;26-托杆;27-下螺栓;28-下凹凸模;29-下推板;30-固定挡料销;31-滑动导柱;32-滑动导套。  1-upper die base; 2-upper bolt; 3-upper concave-convex die; 4-fixing plate for punching punch; 5-upper backing plate; 6-die handle; 10-upper push plate; 11-upper cylindrical pin; 12-upper concave-convex die fixing plate 13-fixed unloading plate; 14-blanking die; 15-unloading plate screw; 16-lining plate; 17-lower cylindrical pin ;18-the lower concave and convex die fixing plate; 19-the lower backing plate; 20-the lower mold base; Support bar; 27-lower bolt; 28-lower concave-convex die; 29-lower push plate; 30-fixed stop pin; 31-sliding guide post; 32-sliding guide sleeve. the

具体实施方式 Detailed ways

如附图所示,该电器开关网芯落料拉深冲孔复合模,包括固定在机架上的下模座20,及由动力机构带动并通过导轨与下模座作竖直相对运动的上模座1,及安装于下模座20上方的落料凹模14,及安装于落料凹模14中央的下凹凸模28,及安装于上模座1上且与落料凹模14和下凹凸模28配合的上凹凸模3,及与所述下凹凸模28中心配合的冲孔凸模8;所述上模座1内安装有向下顶推工件的顶杆结构;所述下模座20内安装有向上顶推 工件的推杆机构;所述落料凹模14上方通过卸料板螺钉安装有固定卸料板13;所述上模座1与下模座20之间安装有滑动导柱31;所述滑动导柱31外围安装有滑动导套32;所述推杆机构由下推板29、托杆26、推盘21、弹簧22、夹压板24、锁紧螺母23组成:所述托杆竖直放置,且其上端与下推板29安装;所述托杆下端依次与推盘21、弹簧22、夹压板24和锁紧螺母23安装;所述顶杆结构由打杆7、顶杆9和上推板10构成:所述顶杆9与托杆26中心线在同一直线上;所述顶杆9下端与上推板10安装,上端与打杆7安装。  As shown in the accompanying drawings, the blanking, drawing, punching and punching compound die for the electrical switch mesh includes a lower mold base 20 fixed on the frame, and a vertical relative movement between the lower mold base and the lower mold base driven by the power mechanism. Upper die base 1, and the blanking die 14 that is installed on the lower die base 20 top, and the lower concave-convex die 28 that is installed in the center of the blanking die base 14, and is installed on the upper die base 1 and with the blanking die 14 The upper concave-convex mold 3 that cooperates with the lower concave-convex mold 28, and the punching punch 8 that cooperates with the center of the lower concave-convex mold 28; the ejector rod structure that pushes the workpiece downward is installed in the described upper mold base 1; the lower mold A push rod mechanism for upwardly pushing the workpiece is installed in the seat 20; a fixed stripping plate 13 is installed above the blanking die 14 through a stripping plate screw; Sliding guide post 31; sliding guide sleeve 32 is installed on the periphery of the sliding guide post 31; the push rod mechanism is composed of a lower push plate 29, a support rod 26, a push plate 21, a spring 22, a clamping plate 24, and a lock nut 23 : the supporting rod is vertically placed, and its upper end is installed with the lower push plate 29; the lower end of the supporting rod is installed with the push plate 21, spring 22, clamping plate 24 and lock nut 23 successively; Rod 7, push rod 9 and upper push plate 10 constitute: described push rod 9 and support bar 26 center lines are on the same straight line; the

所述冲孔凸模8外围安装有冲孔凸模固定板4;所述上凹凸模3外围安装有上凹凸模固定板12;所述冲孔凸模固定板12后方安装有上垫板5;所述上垫板5上方安装有模柄6;所述打杆7贯穿模柄6;所述模柄6、上垫板5、冲孔凸模固定板4和上凹凸模固定板12通过上螺栓2和上圆柱销11固定。  The periphery of described punching punch 8 is equipped with punching punch fixing plate 4; the periphery of described upper concave and convex mold 3 is equipped with upper concave and convex mold fixing plate 12; the rear of described punching punch fixing plate 12 is equipped with upper backing plate 5; 5, a die handle 6 is installed above; the punching rod 7 runs through the die handle 6; fixed. the

所述下凹凸模28外围安装有下凹凸模固定板18;所述下凹凸模固定板18上方安装有垫板16;所述下凹凸模固定板18下方安装有下垫板19;所述下垫板19、下凹凸模固定板18和下模座20通过下圆柱销17和下螺栓27固定安装。  Described lower concave-convex mold 28 periphery is equipped with lower concave-convex mold fixed plate 18; Described lower concave-convex mold fixed plate 18 top is equipped with backing plate 16; Described lower concave-convex mold fixed plate 18 below is equipped with lower backing plate 19; Backing plate 19, lower concave-convex mold fixed plate 18 and lower mold base 20 are fixedly installed by lower cylindrical pin 17 and lower bolt 27. the

所述托杆26后端设置为双头螺柱25;所述弹簧22固定在双头螺柱上,且双头螺柱中间开孔。  The rear end of the support rod 26 is set as a double-ended stud 25; the spring 22 is fixed on the double-ended stud, and the middle of the double-ended stud has a hole. the

所述落料凹模14一侧安装有固定挡料销30。  A fixed stopper pin 30 is installed on one side of the blanking die 14 . the

本实用新型的落料拉深冲孔复合模,通过上模座上的上凹凸模和凸模以及下模座的凹模和下凹凸模,可以将制件一次完成,不但保证了制件的 精度,加快了生产速度,节约了生产成本。  The blanking, drawing, punching and punching compound mold of the utility model can complete the workpiece at one time through the upper concave-convex mold and the convex mold on the upper mold base and the concave mold and lower concave-convex mold of the lower mold base, which not only ensures the precision of the workpiece Accuracy speeds up production and saves production costs. the

上面所述的实施例仅仅是对本实用新型的优选实施方式进行描述,并非对本实用新型的构思和范围进行限定。在不脱离本实用新型设计构思的前提下,本领域普通人员对本实用新型的技术方案做出的各种变型和改进,均应落入到本实用新型的保护范围,本实用新型请求保护的技术内容,已经全部记载在权利要求书中。  The above-mentioned embodiments are only descriptions of preferred implementations of the present utility model, and are not intended to limit the concept and scope of the present utility model. Under the premise of not departing from the design concept of the present utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the present utility model should fall into the protection scope of the present utility model, and the technology claimed by the utility model The contents are all described in the claims. the

Claims (5)

1.一种电器开关网芯落料拉深冲孔复合模,包括固定在机架上的下模座(20),及由动力机构带动并通过导轨与下模座作竖直相对运动的上模座(1),及安装于下模座(20)上方的落料凹模(14),及安装于落料凹模(14)中央的下凹凸模(28),及安装于上模座(1)上且与落料凹模(14)和下凹凸模(28)配合的上凹凸模(3),及与所述下凹凸模(28)中心配合的冲孔凸模(8);其特征在于,所述上模座(1)内安装有向下顶推工件的顶杆结构;所述下模座(20)内安装有向上顶推工件的推杆机构;所述落料凹模(14)上方通过卸料板螺钉安装有固定卸料板(13);所述上模座(1)与下模座(20)之间安装有滑动导柱(31);所述滑动导柱(31)外围安装有滑动导套(32):  1. A composite mold for blanking, deep drawing and punching of electrical switch net core, comprising a lower mold base (20) fixed on the frame, and an upper mold driven by a power mechanism and moving vertically relative to the lower mold base through guide rails Die base (1), and the blanking die (14) that is installed on the top of the lower die base (20), and the lower concave-convex die (28) that is installed in the center of the blanking die base (14), and is installed on the upper die base (1) the upper concave-convex die (3) that is matched with the blanking die (14) and the lower concave-convex die (28), and the punching punch (8) that cooperates with the center of the lower concave-convex die (28); its characteristics That is, the ejector rod structure for pushing the workpiece downward is installed in the upper mold base (1); the push rod mechanism for pushing the workpiece upward is installed in the lower mold base (20); the blanking die ( 14) above, a fixed stripping plate (13) is installed through the stripping plate screw; a sliding guide column (31) is installed between the upper mold base (1) and the lower mold base (20); the sliding guide column ( 31) Sliding guide sleeve (32) is installed on the periphery: 所述推杆机构由下推板(29)、托杆(26)、推盘(21)、弹簧(22)、夹压板(24)、锁紧螺母(23)组成:所述托杆竖直放置,且其上端与下推板(29)安装;所述托杆下端依次与推盘(21)、弹簧(22)、夹压板(24)和锁紧螺母(23)安装;  Described push rod mechanism is made up of lower push plate (29), support rod (26), push plate (21), spring (22), clamping plate (24), lock nut (23): described support rod is vertical Place it, and its upper end is installed with the lower push plate (29); the lower end of the support rod is installed with the push plate (21), spring (22), clamping plate (24) and lock nut (23) in turn; 所述顶杆结构由打杆(7)、顶杆(9)和上推板(10)构成:所述顶杆(9)与托杆(26)中心线在同一直线上;所述顶杆(9)下端与上推板(10)安装,上端与打杆(7)安装。  The ejector rod structure is composed of a driving rod (7), a ejector rod (9) and an upper push plate (10): the ejector rod (9) is on the same straight line as the center line of the support rod (26); the ejector rod (9) the lower end is installed with the upper push plate (10), and the upper end is installed with the beat bar (7). the 2.根据权利要求1所述的电器开关网芯落料拉深冲孔复合模,其特征在于,所述冲孔凸模(8)外围安装有冲孔凸模固定板(4);所述上凹凸模(3)外围安装有上凹凸模固定板(12);所述冲孔凸模 固定板(12)后方安装有上垫板(5);所述上垫板(5)上方安装有模柄(6);所述打杆(7)贯穿模柄(6);所述模柄(6)、上垫板(5)、冲孔凸模固定板(4)和上凹凸模固定板(12)通过上螺栓(2)和上圆柱销(11)固定。  2. electric switch mesh core blanking drawing deep drawing punching composite die according to claim 1, it is characterized in that, described punching punch (8) periphery is equipped with punching punch fixing plate (4); Described upper concave-convex die ( 3) the upper concave-convex die fixing plate (12) is installed on the periphery; the upper backing plate (5) is installed behind the punching punch fixing plate (12); the mold handle (6) is installed above the upper backing plate (5); The punching rod (7) runs through the die handle (6); the die handle (6), upper backing plate (5), punching punch fixing plate (4) and upper concave and convex die fixing plate (12) pass through the upper bolt (2) ) and the upper cylindrical pin (11) to fix it. the 3.根据权利要求1所述的电器开关网芯落料拉深冲孔复合模,其特征在于,所述下凹凸模(28)外围安装有下凹凸模固定板(18);所述下凹凸模固定板(18)上方安装有垫板(16);所述下凹凸模固定板(18)下方安装有下垫板(19);所述下垫板(19)、下凹凸模固定板(18)和下模座(20)通过下圆柱销(17)和下螺栓(27)固定安装。  3. The blanking, drawing and punching composite die for electrical switch net core according to claim 1, wherein, the lower concave-convex mold (28) periphery is equipped with a lower concave-convex mold fixing plate (18); the lower concave-convex mold A backing plate (16) is installed above the mold fixed plate (18); a lower backing plate (19) is installed below the described lower concave-convex mold fixed plate (18); 18) and lower mold base (20) are fixedly installed by following cylindrical pin (17) and lower bolt (27). the 4.根据权利要求1所述的电器开关网芯落料拉深冲孔复合模,其特征在于,所述托杆(26)后端设置为双头螺柱(25);所述弹簧(22)固定在双头螺柱上,且双头螺柱中间开孔。  4. The electrical switch mesh core blanking, drawing and punching composite mold according to claim 1, characterized in that, the rear end of the support rod (26) is set to a stud (25); the spring (22 ) is fixed on the stud with a hole in the middle of the stud. the 5.根据权利要求1所述的电器开关网芯落料拉深冲孔复合模,其特征在于,所述落料凹模(14)一侧安装有固定挡料销(30)。  5. The electrical switch mesh core blanking, drawing and punching composite mold according to claim 1, characterized in that, a fixed stopper pin (30) is installed on one side of the blanking die (14). the
CN201420482219.5U 2014-08-26 2014-08-26 A kind of electric switch web-roll core blanking and drawing punching hole composite die Expired - Fee Related CN204035358U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104759538A (en) * 2015-04-09 2015-07-08 哈尔滨建成集团有限公司 Integral punching forming type combined die
CN107030177A (en) * 2017-06-14 2017-08-11 江西江铃底盘股份有限公司 A kind of automobile drive axle adjusting nut Blanking Punching Compound Die
CN107931429A (en) * 2017-12-15 2018-04-20 长安大学 A kind of inner and outer ring blanking and drawing rushes bottom compound die
CN108057774A (en) * 2017-12-16 2018-05-22 上海柘电金属科技有限公司 A kind of Blanking punching die
CN111760976A (en) * 2020-06-28 2020-10-13 江苏博俊工业科技股份有限公司 One step blanking stretch punching continuous die
CN112246975A (en) * 2020-09-28 2021-01-22 中原利达铁路轨道技术发展有限公司 Automatic composite stamping production line

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104759538A (en) * 2015-04-09 2015-07-08 哈尔滨建成集团有限公司 Integral punching forming type combined die
CN107030177A (en) * 2017-06-14 2017-08-11 江西江铃底盘股份有限公司 A kind of automobile drive axle adjusting nut Blanking Punching Compound Die
CN107931429A (en) * 2017-12-15 2018-04-20 长安大学 A kind of inner and outer ring blanking and drawing rushes bottom compound die
CN107931429B (en) * 2017-12-15 2023-06-30 长安大学 Composite die for blanking, deep drawing and bottom drawing of inner ring and outer ring
CN108057774A (en) * 2017-12-16 2018-05-22 上海柘电金属科技有限公司 A kind of Blanking punching die
CN108057774B (en) * 2017-12-16 2019-08-02 上海柘电金属科技有限公司 A kind of Blanking punching die
CN111760976A (en) * 2020-06-28 2020-10-13 江苏博俊工业科技股份有限公司 One step blanking stretch punching continuous die
CN112246975A (en) * 2020-09-28 2021-01-22 中原利达铁路轨道技术发展有限公司 Automatic composite stamping production line

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