A cold stamping die
By replacing electric push rods and sensors with linkage components and elastic elements in cold stamping dies, the problem of increased costs in existing technologies is solved, and efficient stamping part output and structural optimization are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU MINGHE PRECISION MOULD CO LTD
- Filing Date
- 2025-03-19
- Publication Date
- 2026-06-23
AI Technical Summary
Existing cold stamping dies control the material output via electric push rods and distance sensors after the stamped workpiece is formed, which increases the operating cost of the equipment.
By replacing the electric push rod and distance sensor with a linkage component and elastic element, the side wall of the stamped part is ejected through the linkage of the push rod and spring, thus reducing the operating cost of the device.
It achieves efficient output of stamped parts, reduces the operating cost of the equipment, and improves the rationality of the structure.
Smart Images
Figure CN224389828U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cold stamping technology, specifically a cold stamping die. Background Technology
[0002] Cold stamping is a pressure processing method that uses a stamping die on a press to apply pressure to sheet metal at room temperature, causing it to undergo plastic deformation or separation, thereby obtaining parts with the required shape and size. Cold stamping can process parts with thin walls, light weight, complex shapes, good surface quality, and high rigidity. The dimensional tolerances of cold stamped parts are guaranteed by the die, resulting in "identical" parts with stable product quality. Cold stamping is one of the few or no chip processing methods, saving energy, reducing consumption, and increasing efficiency. The cost of stamped parts is also relatively low. Cold stamping production relies on a press and die to complete the processing, resulting in high productivity, simple operation, and ease of mechanization and automation.
[0003] For example, patent publication number CN220406845U provides an automotive cold stamping die, including a top plate, a push plate, and a bottom plate. A die cavity is fixed to the top of the bottom plate, and a punch is fixed to the bottom of the push plate. Four columns are arranged between the bottom plate and the top plate. The die cavity has an internal cavity, and a circular hole communicating with the internal cavity is opened at the top of the die cavity. A T-shaped countersunk is inserted into the circular hole, and a first spring is sleeved on the countersunk. The bottom end of the first spring is fixed to the bottom wall of the internal cavity, and the top end of the first spring is fixed to the outer wall of the countersunk. A frame plate is fixed to the rear end of the bottom plate, and an electric push rod is fixed on the frame plate. The output shaft of the electric push rod is connected to a push block located above the die cavity. A mechanism for automatically controlling the electric push rod is provided on the top plate. In this invention, during stamping, the first spring is compressed. After stamping, the first spring pushes the countersunk to reset, and the output shaft of the electric push rod moves forward. Then, through the push block, the workpiece is pushed forward along the die cavity to unload the workpiece.
[0004] In the above-mentioned device, after the stamped workpiece is formed, the discharge of the formed workpiece is controlled by the extension and retraction of the electric push rod. The extension and retraction of the electric push rod is controlled by a distance sensor and cannot be linked with the relative movement between the bottom plate and the top plate. The addition of the electric push rod and the distance sensor will increase the operating cost of the device.
[0005] Therefore, a cold stamping die is proposed to address the above problems. Utility Model Content
[0006] To address the shortcomings of existing technologies and solve the problem of controlling the ejection of stamped workpieces by extending and retracting an electric push rod after forming, where the extension and retraction of the electric push rod is controlled by a distance sensor and cannot be linked with the relative movement between the bottom plate and the top plate, and the addition of the electric push rod and distance sensor increases the operating cost of the device, a cold stamping die is proposed.
[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: The cold stamping die of this utility model includes an upper die base and a lower die base. The upper die base and the lower die base cooperate with each other through guide pillars and guide sleeves. A supporting base plate is fixedly connected to one side of the top surface of the lower die base through a bracket. A push rod is slidably installed on the top surface of the supporting base plate. Both ends of the push rod are fixedly connected to a linkage assembly. The linkage assembly includes a vertical plate. The vertical plate is fixedly connected to the side wall of the push rod away from the lower die base. A deflection plate is hinged to one end of the vertical plate through a bracket. An arc-shaped guide rod is fixedly connected to the lower side of one side of the deflection plate.
[0008] Preferably, one end of the arc-shaped guide rod passes through the side wall opening of the upright plate, and an arc-shaped spring is fitted on the outer wall of the arc-shaped guide rod, with the arc-shaped spring located between the adjacent side walls of the upright plate and the deflection plate.
[0009] Preferably, the push rod is vertically fixed to the side wall away from the lower mold base and near the edges of both ends, and a positioning base plate is slidably fitted between the outer walls of the limiting guide rod.
[0010] Preferably, a punching spring is slidably fitted between the outer walls of the limiting guide rod, and the punching spring is located between the adjacent side walls of the top rod and the positioning base plate.
[0011] Preferably, the top surface of the supporting base plate is provided with a plurality of limiting through holes, and the plurality of limiting through holes are equally spaced along the side of the supporting base plate.
[0012] Preferably, a positioning pin is installed between the through holes on the top surface of the positioning base plate, and the bottom guide rod of the positioning pin extends to the bottom of the positioning base plate through the through hole and the limiting through hole.
[0013] Preferably, the top surface of the upper mold base is symmetrically provided with relief grooves, and the two relief grooves are respectively located outside the upper projection of the two upright plates.
[0014] Preferably, a pressing plate is fixedly connected to the side of the upper mold base near the linkage component by a bracket. The pressing plate can be hidden inside the relief groove, and a counterweight is fixedly connected to one end of the pressing plate.
[0015] The beneficial effects of this utility model are:
[0016] In this invention, the ejector rod is installed on the support base plate. As the ejector rod moves between the upper and lower mold bases, it can eject the stamping part that was pushed out of the groove of the lower mold base from the side of the mold. During this process, the lifting of the upper mold base can cooperate with the parts of the linkage assembly. The positioning base plate and the positioning pin cooperate to limit the position of the guide rod on the side wall of the ejector rod, providing elastic force for the punching spring between the positioning base plate and the ejector rod. After the lower mold base moves up and disengages from the linkage assembly, the ejector rod as a whole can elastically impact the stamping part between the upper and lower mold bases under the elastic force of the punching spring to achieve side wall unloading. This replaces the function of the electric push rod and the distance sensor, reducing the cost of using the device. Attached Figure Description
[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0018] Figure 1 This is a perspective view of the present invention;
[0019] Figure 2 This is a perspective view of the upper mold base in this utility model;
[0020] Figure 3 This is a perspective view of the lower mold base in this utility model;
[0021] Figure 4 This is a perspective view of the supporting base plate, top rod, and positioning base plate in this utility model;
[0022] Legend:
[0023] 1. Upper mold base; 2. Lower mold base; 3. Support base plate; 4. Ejector rod; 5. Linkage assembly; 51. Vertical plate; 52. Deflection plate; 53. Arc-shaped guide rod; 54. Arc-shaped spring; 41. Limiting guide rod; 6. Positioning base plate; 42. Punching spring; 31. Limiting through hole; 61. Positioning pin; 11. Relief groove; 12. Pressing horizontal plate; 13. Counterweight block. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0025] Specific implementation examples are given below.
[0026] Please see Figure 1 - Figure 4 This utility model provides a cold stamping die, including an upper die base 1 and a lower die base 2. The upper die base 1 and the lower die base 2 are connected to each other by guide pillars and guide sleeves. A supporting base plate 3 is fixedly connected to one side of the top surface of the lower die base 2 by a bracket. A push rod 4 is slidably installed on the top surface of the supporting base plate 3. Both ends of the push rod 4 are fixedly connected to a linkage assembly 5. The linkage assembly 5 includes a vertical plate 51, which is fixedly connected to the side wall of the push rod 4 away from the lower die base 2. A deflection plate 52 is hinged to one end of the vertical plate 51 by a bracket. An arc-shaped guide rod 53 is fixedly connected to the lower side of one side of the deflection plate 52. One end of the arc-shaped guide rod 53 passes through the side wall opening of the vertical plate 51. An arc-shaped spring 54 is fitted on the outer wall of the arc-shaped guide rod 53. The arc-shaped spring 54 is located between the adjacent side walls of the vertical plate 51 and the deflection plate 52, which holds the workpiece to be stamped. After being placed on the upper mold base 1, the lower mold base 2 gradually moves down under the action of the press. During this process, the bottom edge of the lower mold base 2 first contacts the side wall of the deflection plate 52 and overcomes the elastic force of the arc spring 54 until it is pressed down to the limit. At this time, the deflection plate 52 and the upright plate 51 are in a parallel state. At this time, the part is stamped and formed. Then the lower mold base 2 gradually moves up, and the deflection plate 52 deflects and returns to its original position under the elastic force of the arc spring 54. The arc guide rod 53 can limit the position of the arc spring 54. When the linkage component 5 is completely separated from the lower mold base 2, the ejector rod 4 can elastically stamp the stamped part that is ejected from the molding groove on the upper mold base 1 in cooperation with the supporting base plate 3 and the parts on it, and discharge the stamped part, replacing the function of the electric push rod and the distance sensor.
[0027] like Figure 3 and Figure 4As shown, limit guide rods 41 are vertically fixed to the side wall of the ejector rod 4 away from the lower mold base 2 near both ends. A positioning base plate 6 is slidably fitted between the outer walls of the limit guide rods 41. A punching spring 42 is slidably fitted between the outer walls of the limit guide rods 41. The punching spring 42 is located between the adjacent side walls of the ejector rod 4 and the positioning base plate 6. Multiple limit through holes 31 are opened on the top surface of the supporting base plate 3. The multiple limit through holes 31 are equidistantly opened along the side direction of the supporting base plate 3. A positioning pin 61 is installed between the through holes on the top surface of the positioning base plate 6. The bottom guide rod of the positioning pin 61 extends to the bottom of the positioning base plate 6 through the through hole limit through hole 31. When the positioning pin 61 passes through the positioning base plate 6 and the limit through hole 31, the ejector rod 41 is ejected. The position of rod 4 and positioning base plate 6 is limited. At this time, the ejector rod 4 can only reciprocate under the limitation between the limiting guide rod 41 and the guide sleeve of the positioning base plate 6. During the pressing of the lower mold base 2, the ejector rod 4 gradually moves away from the lower mold base 2. At this time, the punching spring 42 contracts. When the lower mold base 2 returns to its original position and moves to disengage from the linkage component 5, the elastic force of the punching spring 42 can provide elastic force for the ejector rod 4 to punch and unload the part. The positioning pin 61 and the limiting through holes 31 at different positions on the supporting base plate 3 can change the stroke of the punching spring 42, thereby controlling the magnitude of the elastic force of the punching spring 42, and cooperating to control the relative force between the ejector rod 4 and the part.
[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the top surface of the upper mold base 1 is symmetrically provided with relief grooves 11. The two relief grooves 11 are respectively located outside the projection of the two vertical plates 51. A pressing horizontal plate 12 is fixedly connected to the side of the upper mold base 1 near the linkage component 5 by a bracket. The pressing horizontal plate 12 can be hidden inside the relief grooves 11. A counterweight block 13 is fixedly connected to one end of the pressing horizontal plate 12. The upper mold base 1 is fitted with the pressing horizontal plate 12 through the opening of the relief grooves 11, so that when the upper mold base 1 and the lower mold base 2 are fully fitted, the pressing horizontal plate 12 can be completely hidden inside the relief grooves 11. The pressing horizontal plate 12 is located in the counterweight block 13. With the cooperation of block 13, it has a downward pressing force. When the linkage component 5 moves with the push rod 4 to the bottom of the lower die base 2, the downward deflected pressing plate 12 can first contact the top of the linkage component 5, and provide the linkage component 5 with a force to move to the position of the lower die base 2 during the gradual pressing of the lower die base 2, until the linkage component 5 contacts the side of the lower die base 2. This prevents the push rod 4 and the linkage component 5 from moving between the upper die base 1 and the lower die base 2 during the reciprocating stamping process of the lower die base 2, thus hindering the stamping between the upper die base 1 and the lower die base 2 and increasing the rationality of the device structure.
[0029] Working principle: After the part to be stamped is placed on the upper die holder 1, the lower die holder 2 gradually moves down under the action of the press. During this process, the bottom edge of the lower die holder 2 first contacts the side wall of the deflection plate 52 and overcomes the elastic force of the arc spring 54 until it is pressed to the limit. At this time, the deflection plate 52 and the upright plate 51 are parallel to each other. At this time, the part is stamped and formed. Then the lower die holder 2 gradually moves up, and the deflection plate 52 deflects back to its original position under the elastic force of the arc spring 54. The arc guide rod 53 can limit the position of the arc spring 54. When the linkage assembly 5 is fully connected... After separating from the lower die base 2, the ejector rod 4, in cooperation with the supporting base plate 3 and its upper parts, can elastically press the stamping part ejected from the molding groove on the upper die base 1, thus discharging the stamping part. When the positioning pin 61 passes through the positioning base plate 6 and the limiting through hole 31, the ejector rod 4 and the positioning base plate 6 are positioned. At this time, the ejector rod 4 can only reciprocate within the limitation between the limiting guide rod 41 and the guide sleeve of the positioning base plate 6. During the pressing down of the lower die base 2, the ejector rod 4 gradually moves away from the lower die base 2. At this time, the punching spring 42 contracts. When the lower die base 2 returns to its original position and moves to the position of the linkage component... 5. When disengaged, the elastic force of the punching spring 42 provides elastic force for the ejector rod 4 to punch and unload the part. The positioning pin 61 and the limiting through holes 31 at different positions on the supporting base plate 3 can interlock to change the stroke of the punching spring 42, thereby controlling the magnitude of the elastic force of the punching spring 42. This, in conjunction with controlling the relative force between the ejector rod 4 and the part, allows the upper die base 1 to install the pressing cross plate 12 through the opening of the relief groove 11. When the upper die base 1 and the lower die base 2 are fully fitted, the pressing cross plate 12 can be completely hidden inside the relief groove 11, and the pressing... The horizontal plate 12, with the cooperation of the counterweight 13, has a downward pressing force. When the linkage component 5 moves with the push rod 4 to the bottom of the lower die base 2, the downward deflected pressing horizontal plate 12 can first contact the top of the linkage component 5, and provide the linkage component 5 with a force to move to the position of the lower die base 2 during the gradual pressing of the lower die base 2, until the linkage component 5 contacts the side of the lower die base 2. This prevents the push rod 4 and the linkage component 5 from moving between the upper die base 1 and the lower die base 2 during the reciprocating stamping process of the lower die base 2, thus hindering the stamping between the upper die base 1 and the lower die base 2.
[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A cold stamping die, characterized in that: The device includes an upper mold base (1) and a lower mold base (2). The upper mold base (1) and the lower mold base (2) are connected to each other by guide pillars and guide sleeves. A supporting base plate (3) is fixed to one side of the top surface of the lower mold base (2) by a bracket. A push rod (4) is slidably installed on the top surface of the supporting base plate (3). Both ends of the push rod (4) are fixed to a linkage assembly (5). The linkage assembly (5) includes a vertical plate (51). The vertical plate (51) is fixed to the side wall of the push rod (4) away from the lower mold base (2). One end of the vertical plate (51) is hinged to a deflection plate (52) by a bracket. An arc-shaped guide rod (53) is fixed to the lower side of one side of the deflection plate (52).
2. The cold stamping die according to claim 1, characterized in that: One end of the arc-shaped guide rod (53) passes through the side wall opening of the upright plate (51), and an arc-shaped spring (54) is fitted on the outer wall of the arc-shaped guide rod (53). The arc-shaped spring (54) is located between the adjacent side walls of the upright plate (51) and the deflection plate (52).
3. A cold stamping die according to claim 2, characterized in that: The top rod (4) is vertically fixed to the side wall away from the lower mold base (2) near both ends of the top rod (4), and a positioning base plate (6) is slidably fitted between the outer walls of the positioning guide rod (41).
4. A cold stamping die according to claim 3, characterized in that: A punching spring (42) is slidably fitted between the outer walls of the limiting guide rod (41) and the adjacent side walls of the top rod (4) and the positioning base plate (6).
5. A cold stamping die according to claim 4, characterized in that: The top surface of the supporting base plate (3) is provided with a plurality of limiting through holes (31), and the plurality of limiting through holes (31) are equally spaced along the side of the supporting base plate (3).
6. A cold stamping die according to claim 5, characterized in that: A positioning pin (61) is installed between the through holes on the top surface of the positioning base plate (6), and the bottom guide rod of the positioning pin (61) extends to the bottom of the positioning base plate (6) through the through hole limiting through hole (31).
7. A cold stamping die according to claim 1, characterized in that: The top surface of the upper mold base (1) is symmetrically provided with relief grooves (11), and the two relief grooves (11) are respectively located outside the projection above the two upright plates (51).
8. A cold stamping die according to claim 7, characterized in that: A pressing plate (12) is fixedly connected to the side of the upper mold base (1) near the linkage component (5) by a bracket. The pressing plate (12) can be hidden inside the relief groove (11). A counterweight (13) is fixedly connected to one end of the pressing plate (12).