Double-folded reed, continuous forming stamping die and machining method
By designing a continuous molding stamping mold, the problem of full continuous production of bifold reeds is solved, and efficient and cost-saving complex reed production is achieved.
Patent Information
- Application Number
- CN202510380617.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-06-20
AI Technical Summary
The prior art is difficult to achieve full continuous production of bifold reeds, resulting in low production efficiency and difficult to achieve mass production.
A continuous forming stamping mold is designed, and the material belt is gradually processed through the punching unit, punching unit, bending mechanism and shearing unit in the mold to form a complex bifold reed structure.
The full continuous production of bifold reeds is achieved, the product quality and production efficiency is improved, labor and machine costs are saved, and the problem of insufficient strength of the shear blade is solved.
Smart Images
Figure CN120169941A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of reed manufacturing, and particularly to a double-fold reed, a continuous forming stamping die and a processing method. Background Art
[0002] Beryllium copper reeds have excellent compressive resistance, resilience and corrosion resistance, and provide good broadband electromagnetic shielding effect. Therefore, they are widely used in the gap filling of various electronic products. There are various reed structures according to the applicable occasions, among which the structure of the double-fold reed is relatively complex.
[0003] Both ends of the double-fold reed are bent upward and downward respectively. The strength at the bending part is limited, and the strip will break during continuous die stamping. In the prior art, a simple hand plate die is usually used for single-step forming by laser laser, and only a single reed can be produced each time, so mass production cannot be realized and the production efficiency is extremely low.
[0004] Therefore, there is an urgent need for a double-fold reed, a continuous forming stamping die and a processing method that can realize full continuous production and forming. Summary of the Invention
[0005] In view of the above deficiencies of the prior art, the purpose of the present application is to provide a double-fold reed, a continuous forming stamping die and a processing method, aiming to overcome the problem that the forming structure of the double-fold reed in the prior art is complex and difficult to continuously produce.
[0006] One technical solution adopted by the present application to solve the technical problem is as follows:
[0007] A double-fold reed includes a reed body integrally stamped in sequence, and the reed body includes:
[0008] A connecting part, with a positioning hole opened in the middle of the connecting part;
[0009] An upper folding part, with an opening in the middle of the upper folding part, and an inclined plate connected to the upper folding part on the side wall of the opening, and the inclined plate is inclined towards the connecting part;
[0010] A lower folding part, the upper folding part and the lower folding part are respectively connected to both ends of the connecting part, and there is an arc transition between the upper folding part and the lower folding part and the connecting part, and a convex bulge bulging downward is provided in the middle of the lower folding part.
[0011] The present application also provides a continuous forming stamping die, which is used to continuously process the double-folded reed as described above from a strip of material. The continuous forming stamping die includes a die body. In the middle of the die body, there are successively arranged a punching unit, a first punching and cutting unit, an inclined piercing unit, a second punching and cutting unit, a step-by-step bending mechanism, and a shearing unit for shearing the waste between the double-folded reeds. The punching unit is used to punch positioning holes in the strip of material. The first punching and cutting unit and the second punching and cutting unit are used to punch and cut the strip of material into spaced-apart forming parts and connecting parts. The step-by-step bending mechanism is used to perform multiple bending processes on the forming parts to form double-folded reed units. The shearing unit is used to cut off the connecting parts between the double-folded reed units and the strip of material along the edges of the double-folded reed units.
[0012] Optionally, the die body includes an upper die and a lower die which are arranged opposite to each other up and down. The upper die includes an upper die base, an upper backing plate, and an upper clamping plate which are connected in sequence from top to bottom. The lower die includes a stripper plate, a lower template, a lower backing plate, and a lower die base which are connected in sequence from top to bottom.
[0013] Optionally, the step-by-step bending mechanism includes a first bending unit, a second bending unit, a third bending unit, a fourth bending unit, a fifth bending unit, a sixth bending unit, a seventh bending unit, and an eighth bending unit which are arranged at intervals along the advancing direction of the strip of material. The first bending unit and the second bending unit are respectively used to punch arcs at both ends of the forming part. The third bending unit is used to punch upward at both ends of the forming part to form an upper folding part and a lower folding part with a convex bulge. The fourth bending unit, the fifth bending unit, and the eighth bending unit perform step-by-step bending on the lower folding part. The sixth bending unit and the seventh bending unit perform step-by-step bending on the upper folding part.
[0014] Optionally, the punching unit includes a stepped punch and a die cutting edge. The stepped punch is fixed to the upper clamping plate. The die cutting edge corresponds to the stepped punch and is arranged on the lower template. The strip of material is located on the lower template. When the upper die moves downward, the stepped punch synchronously moves downward through the strip of material and punches the positioning holes in it. A hollow air inlet channel is formed in the middle of the stepped punch. The air inlet channel is communicated with an air outlet at the bottom of the stepped punch. The air flow blown out through the air outlet blows the waste at the top of the stepped punch into the die cutting edge.
[0015] Combined with the attached Figure 8As shown, the first bending unit includes a first forming punch, a stripping block, a first spring, a first ejector rod, and a forming die. The first forming punch is disposed on the upper clamping plate, the forming die is correspondingly disposed on the lower template, the stripping block is fixed in the upper clamping plate, the first ejector rod and the first spring are sequentially fixed on a side of the stripping block away from the forming die, and the strip is located above the forming die. When the upper die moves downward, the stripping block presses the forming portion of the strip under the action of the first spring and the first ejector rod, and the first forming punch presses the strip into the forming die to achieve bending.
[0016] Combined with the attached Figure 9 As shown, the sixth bending unit includes a first insert knife, a stop block, a second spring, a first horizontal punch, a third spring, a second ejector rod, and a second horizontal punch. The first insert knife is fixed to the side of the upper clamping plate and extends downward. The stop block is fixed to the lower die base and abuts against a side of the first insert knife away from the strip. The first horizontal punch is disposed on one side of the first insert knife and is horizontally movably fixed to one side of the lower template through the second spring. The second horizontal punch is oppositely disposed on the opposite side of the first horizontal punch and is rotatably fixed to the lower template. The second ejector rod and the third spring are sequentially disposed under the second horizontal punch, and the strip is located between the first horizontal punch and the second horizontal punch. When the upper die moves downward, the first horizontal punch moves toward the strip under the guiding action of the first insert knife and bends the strip under the opposite action of the second horizontal punch. When the upper die moves upward, the second horizontal punch rotates around the rotation axis under the action of the second ejector rod and the third spring to allow the strip to pass through.
[0017] Combined with the attached Figure 7 As shown, the diagonal piercing unit includes an open die, a second insert knife, a third ejector rod, a fourth spring, a fifth spring, a driving block, a punch insert, a piercing punch, and a sixth spring. A die inner hole is formed in the middle of the open die. The open die is movably disposed on the upper clamping plate. The third ejector rod and the fourth spring are sequentially connected to the open die away from the strip. The second insert knife is fixed to the side of the upper clamping plate and extends downward. The driving block is L-shaped, and an end face of the driving block abuts against an inclined surface of the second insert knife. Two ends of the fifth spring are respectively connected to a side wall of the driving block and a side face of the upper template. The punch insert is disposed above the driving block. The piercing punch is fixed to the punch insert and is disposed corresponding to the die inner hole. The strip is located between the open die and the piercing punch. When the upper die moves downward, the second insert knife moves downward, and the driving block moves upward under the action of the inclined surface of the second insert knife, driving the piercing punch into the die inner hole to pierce the strip.
[0018] Optionally, guiding pins corresponding to the positioning holes are provided between the punching unit, the first punching and cutting unit, the inclined piercing unit, the second punching and cutting unit, the first bending unit, the second bending unit, the third bending unit, the fourth bending unit, the fifth bending unit, the sixth bending unit, the seventh bending unit and the eighth bending unit. Specifically, at the punching unit, the opening punch will punch out spaced-apart positioning holes on the strip. By fixing the guiding pins in the upper clamping plate, the guiding pins move downward with the movement of the upper die and enter the positioning holes, thus realizing the guiding and positioning process.
[0019] On the other hand, another technical solution adopted by the present application to solve the technical problem discloses a double-folded reed processing method, which uses a continuous forming stamping die as described above, and includes the following steps:
[0020] Drive the strip to move step by step in a single direction in the continuous forming stamping die, and the punching unit punches out a plurality of spaced-apart positioning holes on the strip. The first punching and cutting unit strips the waste materials on both symmetrical sides of the positioning holes, so that the forming part is between two adjacent positioning holes;
[0021] The inclined piercing unit pierces an opening in the middle of the forming part, and then the second punching and cutting unit strips the waste materials at both ends of the forming part;
[0022] The first bending unit stamps and forms a first bent section in an S shape at one end away from the opening, and makes the included angle between the first bent section and the forming part a preset angle;
[0023] The second bending unit stamps and forms the first bent section and the end of the forming part downward to a preset angle to form a second bent section. The third bending unit stamps and forms the second bent section and the other end of the forming part upward to a preset angle, forming an upper folded part perpendicular to the connecting part and a lower folded part with a convex bump;
[0024] The fourth bending unit stamps and forms the lower folded part downward to a preset angle, and the fifth bending unit stamps and forms the lower folded part upward to a preset angle to form an arc transition between the lower folded part and the connecting part;
[0025] The sixth bending unit stamps and forms the upper folded part downward to a preset angle to make the upper folded part parallel to the connecting part;
[0026] The seventh bending unit stamps and forms the upper folded part downward to a preset angle, and the eighth bending unit stamps and forms the lower folded part upward to a preset angle;
[0027] The shearing unit cuts off the connecting part along the edge of the double-folded reed unit to obtain the double-folded reed.
[0028] Compared with the prior art, in a double-fold leaf spring, a continuous forming stamping die and a processing method thereof according to the present invention, a full-continuous die is designed to perform step-by-step forming on a stamped profile, so as to batch obtain double-fold leaf springs with complex structures, solving the limitation that full-continuous production of complex double-fold leaf springs cannot be achieved in the prior art, greatly improving the product quality and production efficiency, saving labor costs and machine costs, and since the produced double-fold leaf spring products pass through a multi-step bending die, the arc transition can overcome the problem that the original shearing edge has weak strength and requires manual shearing again, realizing full-continuous production of complex leaf springs and greatly reducing labor costs. Description of the Drawings
[0029] Figure 1 is a schematic three-dimensional structure diagram of a double-fold leaf spring according to the present application;
[0030] Figure 2 is a schematic diagram of the structural change of the strip during processing in the present application;
[0031] Figure 3 is a schematic diagram of the cross-sectional change of the forming part during processing in the present application (corresponding to S4-S13 of the double-fold leaf spring processing method);
[0032] Figure 4 is a schematic diagram of the structure of a continuous forming stamping die according to the present application;
[0033] Figure 5 is a schematic diagram of the open die of a continuous forming stamping die according to the present application;
[0034] Figure 6 is a schematic diagram of the closed die of a continuous forming stamping die according to the present application;
[0035] Figure 7 is a schematic diagram of the diagonal piercing unit of a continuous forming stamping die according to the present application;
[0036] Figure 8 is a schematic diagram of the first bending unit of a continuous forming stamping die according to the present application;
[0037] Figure 9 is a schematic diagram of the sixth bending unit of a continuous forming stamping die according to the present application;
[0038] Figure 10 is a schematic diagram of the seventh bending unit of a continuous forming stamping die according to the present application;
[0039] Figure 11 is a schematic diagram of the eighth bending unit of a continuous forming stamping die according to the present application.
[0040] Description of the Reference Numerals:
[0041] Double-fold leaf spring: 1. Connecting part; 11. Positioning hole; 2. Upper folding part; 21. Beveled opening; 22. Inclined plate; 3. Lower folding part; 4. Arc transition.
[0042] Continuous forming stamping die: 100. Upper die base; 101. Upper backing plate; 102. Upper clamping plate; 103. Stripping plate; 104. Lower template; 105. Lower backing plate; 106. Lower die base; 107. Step punch; 108. Die cutting edge; 109. Air inlet channel; 201. Guide pin.
[0043] A. Diagonal piercing unit; A1. Piercing punch; A2. Punch insert; A3. Sixth spring; A4. Open die; A5. Driving block; A7. Third ejector rod; A8. Fourth spring; A10. Second cutter; A11. Fifth spring.
[0044] B1. Punching unit; B2. First punching and cutting unit; B3. Second punching and cutting unit.
[0045] C. First bending unit; C1. First forming punch; C2. Stripping block; C3. First ejector rod; C4. First spring; C7. Forming die.
[0046] D. Second bending unit.
[0047] E. Third bending unit.
[0048] F. Fourth bending unit.
[0049] G. Fifth bending unit.
[0050] H. Sixth bending unit; H7. First cutter; H6. Stopper; H9. Second spring; H5. First horizontal punch; H11. Third spring; H3. Second ejector rod; H1. Second horizontal punch.
[0051] I. Seventh bending unit; I2. Third cutter; I1. Second forming punch.
[0052] J. Eighth bending unit; J1. Fourth cutter; J2. Forming block; J5. Lower folding die.
[0053] K. Shearing unit. Specific embodiments
[0054] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.
[0055] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.
[0056] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0057] In the prior art, the forming of the prototype mold means that the laser first lasers the product shape. After forming, there is no need to perform the tape cutting process, and the products are directly produced individually. However, this method has low production efficiency and is difficult to meet the demand for batch production of double-folded spring pieces. Based on this, a double-folded spring piece, a continuous forming stamping die, and a processing method are proposed in the present application, aiming to overcome the problem that the forming structure of the double-folded spring piece in the prior art is complex and difficult to continuously produce.
[0058] Among them, in the first embodiment of the present application, a double-folded spring piece is proposed, which is obtained by processing with a continuous forming stamping die. Combining with the drawings Figure 1 , it includes a spring piece body formed by integral stamping. This kind of spring piece is usually applied to automotive in-vehicle electronic devices. Due to its structure of folding up and down, it is difficult to be continuously formed in a stamping die. The spring piece body includes:
[0059] A connecting portion 1, in the middle of which there is a positioning hole 11;
[0060] An upper folding portion 2, in the middle of which there is an inclined opening 21. In the inclined opening 21, there is an inclined plate 22 connected to the upper folding portion 2, and the inclined plate 22 is inclined towards the side close to the connecting portion 1;
[0061] The downward folding part 3, the upward folding part 2 and the downward folding part 3 are respectively connected to both ends of the connecting part 1. There is an arc transition 4 between the upward folding part 2 and the downward folding part 3 and the connecting part 1. A convex hull that bulges downward is provided in the middle of the downward folding part 3. The end parts of the upward folding part 2 and the downward folding part 3 are respectively bent toward the side away from the connecting part 1.
[0062] Specifically, in the arc transition 4 structure of the downward folding part 3, both sides are parallel to each other, so as to provide higher shear strength and avoid direct fracture deformation of the shear unit K at the arc transition 4 during stamping in the mold.
[0063] Combined with the attached drawings Figures 4 to 6 As shown, in the second embodiment of the present application, a continuous forming stamping die is proposed, which is used to continuously process double-folded reed pieces as described in the first embodiment from a strip of material. The die body includes a punching unit B1, a first punching unit B2, an inclined punching and piercing unit A, a second punching unit B3, a step-by-step bending mechanism, and a shear unit K for cutting the waste between the double-folded reed pieces along the edge of the double-folded reed piece unit. The punching unit B1 is used to punch positioning holes 11 in the strip of material. The first punching unit B2 and the second punching unit B3 are used to punch the strip of material into spaced forming parts and connecting parts. The step-by-step bending mechanism is used to perform multiple bending processes on the forming parts to form double-folded reed piece units. The shear unit K is used to cut off the connecting part between the double-folded reed piece unit and the strip of material along the edge of the double-folded reed piece unit.
[0064] Combined with the attached Figure 5 As shown, the die body includes an upper die and a lower die arranged opposite to each other up and down. The upper die includes an upper die base 100, an upper backing plate 101, and an upper clamping plate 102 connected in sequence from top to bottom. The lower die includes a stripper plate 103, a lower template 104, a lower backing plate 105, and a lower die base 106 connected in sequence from top to bottom. When the die body is installed on a stamping device, the lower die is fixed, and the upper table surface of the punching press moves downward to drive the entire lower die. When the strip of material moves in the middle of the die, each time it moves downward, the processing unit will process the strip of material below, so that the end of the strip of material is stamped into a double-folded reed piece product.
[0065] Specifically, the step-by-step bending mechanism includes a first bending unit C, a second bending unit D, a third bending unit E, a fourth bending unit F, a fifth bending unit G, a sixth bending unit H, a seventh bending unit I, and an eighth bending unit J that are arranged at intervals along the advancing direction of the strip; the first bending unit C and the second bending unit D are respectively used to punch arcs at both ends of the forming part, the third bending unit E is used to punch upward at both ends of the forming part to form an upper folding part 2 and a lower folding part 3 with a convex bump, the fourth bending unit F, the fifth bending unit G, and the eighth bending unit J perform step-by-step bending on the lower folding part 3, and the sixth bending unit H and the seventh bending unit I perform step-by-step bending on the upper folding part 2.
[0066] Further, in combination with the attached Figure 6 As shown, the punching unit B1 includes a stepped punch 107 and a die cutting edge 108. The stepped punch 107 is fixed to the upper clamping plate 102. The die cutting edge 108 corresponds to the stepped punch 107 and is arranged on the lower template 104. The strip is located on the lower template 104. When the upper die moves downward, the stepped punch 107 synchronously moves downward through the strip to punch the positioning hole 11 on it. In order to prevent the waste generated by punching the positioning hole 11 from being carried out of the die cutting edge 108 by the upward moving stepped punch 107 and causing bruising, a hollow air inlet channel 109 is formed in the middle of the stepped punch 107. The air inlet of the air inlet channel 109 is arranged on the side of the upper backing plate 101. The air inlet channel 109 is communicated with the air outlet at the bottom of the stepped punch 107. The air flow blown out through the air outlet blows the waste at the top of the stepped punch 107 into the die cutting edge 108, thus completing the punching process.
[0067] Optionally, when the strip passes through the punching unit B1, positioning holes 11 spaced apart will be punched on it. Between every two processing units, there is an idle stroke, and guide pins 201 are arranged at the idle stroke. When in the idle stroke, each guide pin 201 will pass through the positioning hole 11 when the upper die moves, thus achieving the effect of guiding and positioning the strip.
[0068] It can be understood that the working principles of the first punching unit B2 and the second punching unit B3 are the same as that of the punching unit B1, that is, the unnecessary waste on the strip is punched off by the punch. In the first punching unit B2, the waste on both sides of the positioning hole 11 is first peeled off, thus dividing the strip into several connected rectangles. The rectangle where the positioning hole 11 is located is the forming part, and the part between the two positioning holes 11 is the connecting part. The second punching then cuts off the excess waste on both sides of the strip to obtain a complete contour of the relatively independent forming part, leaving only the part where the positioning hole 11 is located as the connecting part to ensure the connection between the product and the strip and smoothly send it to the next work station, enabling the material to be further formed backward.
[0069] Further, in combination with the attachedFigure 8 As shown, the first bending unit C includes a first forming punch C1, a stripping block C2, a first spring C4, a first ejector rod C3, and a forming die C7. The first forming punch C1 is disposed on the upper clamping plate 102, and the forming die C7 is correspondingly disposed on the lower template 104. The stripping block C2 is fixed in the upper clamping plate 102. The first ejector rod C3 and the first spring C4 are sequentially fixed on the side of the stripping block C2 away from the forming die C7. The strip is located above the forming die C7. When the upper die moves downward, the stripping block C2 presses the forming part of the strip under the action of the first spring C4 and the first ejector rod C3, and the first forming punch C1 presses the strip into the forming die C7 to achieve bending. By pressing the strip with the stripping block C2, the strip can be kept flat, avoiding stacking when entering the forming die C7 and causing errors in the stamping structure. After the strip is completely formed in the forming die C7, the upper die starts to rise. The stripping block C2 continuously presses the strip until the first forming punch C1 is separated from the strip, and then the stripping block C2 is separated from the strip, completing the 60° forming and continuing to transport the strip forward.
[0070] Further, in combination with the attached Figure 9 As shown, the sixth bending unit H includes a first insert knife H7, a stopper H6, a second spring H9, a first horizontal punch H5, a third spring H11, a second ejector rod H3, and a second horizontal punch H1. The first insert knife H7 is fixed to the side of the upper clamping plate 102 and extends downward. The stopper H6 is fixed to the lower die base 106 and abuts against the side of the first insert knife H7 away from the strip. The first horizontal punch H5 is disposed on one side of the first insert knife H7 and is horizontally movably fixed to one side of the lower template 104 through the second spring H9. The second horizontal punch H1 is oppositely disposed on the opposite side of the first horizontal punch H5. The second horizontal punch H1 is rotatably fixed to the lower template 104. The second ejector rod H3 and the third spring H11 are sequentially disposed under the second horizontal punch H1. The strip is located between the first horizontal punch and the second horizontal punch.
[0071] The contact surface between the first inserting knife H7 and the first horizontal punch H5 is an arc surface with an included angle of 90°. When the upper die moves downward, the first horizontal punch H5 moves toward the side of the strip under the guiding action of the first inserting knife H7. At the same time, the second horizontal punch H1 is subjected to the pressure of the upper die. At this time, the third spring H11 is in a compressed state. The first horizontal punch H5 bends the strip under the opposite action of the second horizontal punch H1. When the upper die moves upward, the third spring H11 releases elastic force. The second horizontal punch H1 is reset under the action of the second ejector rod H3 and the third spring H11 and separates from the strip. The second horizontal punch H1 makes a small amount of rotational movement on the rotation axis line of the rotating shaft so that the strip passes through the second horizontal punch H1 and continues to move forward to the next process.
[0072] Further, as shown in the attached Figure 7 figure, the inclined piercing unit A includes an open die A4, a second inserting knife A10, a third ejector rod A7, a fourth spring A8, a fifth spring A11, a driving block A5, a punch insert A2, a piercing punch A1 and a sixth spring A3. A die inner hole is formed in the middle of the open die. The open die A4 is movably arranged on the upper clamping plate 102. The third ejector rod A7 and the fourth spring A8 are sequentially connected to the open die A4 away from the strip. The second inserting knife A10 is fixed to the side of the upper clamping plate 102 and extends downward. The driving block A5 is L-shaped. The end face of the driving block A5 abuts against the inclined surface of the second inserting knife A10. Both ends of the fifth spring A11 are respectively connected to the side wall of the driving block A5 and the side of the upper template. The punch insert A2 is arranged above the driving block A5. The piercing punch A1 is fixed to the punch insert A2 and is arranged corresponding to the die inner hole. The strip is located between the open punch and the piercing punch A1;
[0073] Specifically, a stop block H6 is also arranged outside the second inserting knife A10 to block the horizontal movement of the inserting knife when it moves downward. The contact surface between the inserting knife and the driving block A5 is an inclined surface. When the upper die moves downward, the second inserting knife A10 moves downward. The driving block A5 moves upward under the action of the inclined surface of the second inserting knife A10, driving the piercing punch A1 into the die inner hole to pierce the strip. Subsequently, the second inserting knife A10 moves upward under the action of the upper die. The punch insert A2 drives the piercing punch A1 to move downward to separate from the product under the action of the sixth spring A3, enabling the strip to enter the next process.
[0074] Optionally, as shown in the attached Figure 10, The working principle of the seventh bending unit I is that when the processing unit is in an idle stroke, the second forming punch I1 needs to be finely adjusted to facilitate the rapid adjustment of the height of the second forming punch I1 to achieve the desired effect. The second forming punch I1 is fixed to the upper clamping plate 102 and moves downward with the entire upper die. The third inserting tool I2 drives the second forming punch I1 to complete the stamping forming of the upper folding part 2.
[0075] Combined with the attached Figure 11 , The working principle of the eighth bending unit J is as follows. The fourth inserting tool J1 is also fixed to the upper clamping plate 102 and moves downward with the entire upper die. It drives the forming block J2 with an inclination to contact the lower folding part 3. Under the counteraction of the lower folding female die J5, the product angle is formed from 69 degrees to 39 degrees. When the punching press reaches the bottom dead center and moves upward, the forming block J2 resets under the action of the spring and separates from the strip to obtain the final double-folded spring piece.
[0076] It can be understood that the working principles of the second bending unit D, the second bending unit D, the third bending unit E, the fourth bending unit F, and the fifth bending unit G are the same as those of the first bending unit C, the sixth bending unit H, the seventh bending unit I, and the eighth bending unit J above. Those skilled in the art can configure various components such as punches, female dies, and inserting tools according to the actual product requirements.
[0077] Furthermore, guiding pins 201 corresponding to the positioning holes 11 are provided between the punching unit B1, the first punching and cutting unit B2, the inclined piercing unit A, the second punching and cutting unit B3, the first bending unit C, the second bending unit D, the third bending unit E, the fourth bending unit F, the fifth bending unit G, the sixth bending unit H, the seventh bending unit I, and the eighth bending unit J. When in an idle stroke, each guiding pin 201 will pass through the positioning hole 11 when the upper die moves, thus achieving the effect of guiding and positioning the strip.
[0078] Corresponding to Embodiment 2, in Embodiment 3 of the present application, a method for processing a double-folded spring piece is proposed. Using a continuous forming stamping die as described in Embodiment 1, it includes the following steps:
[0079] Specifically, the strip is placed into the stamping equipment equipped with the above continuous forming stamping die through step S1. The punching unit B1, the first punching and cutting unit B2, the inclined piercing unit A, the second punching and cutting unit B3, the first bending unit C, the second bending unit D, the third bending unit E, the fourth bending unit F, the fifth bending unit G, the sixth bending unit H, the seventh bending unit I, the eighth bending unit J, and the shearing unit K correspond to steps S2 to S14 one by one, so as to automatically and continuously complete the processing of the stamping profile in steps S2 to S14 and batch output products, as Figure 2 and Figure 3 shown, Figure 2From left to right, it shows that the forming parts at different positions of the strip are processed in sequence at different stations during the forward movement of the strip. Figure 3 It shows the forming part in Figure 2 The corresponding side view when the forming part is bent at the bending station in
[0080] Drive the strip to make a step-by-step movement in a single direction in the continuous forming stamping die, and the punching unit punches a plurality of positioning holes distributed at intervals on the strip. The first punching and cutting unit strips the waste materials on both sides of the symmetry of the positioning holes, so that the forming part is between two adjacent positioning holes; specifically, it includes steps S1 to S3;
[0081] Step S1: Make the strip make a step-by-step movement in a single direction in the continuous forming stamping die;
[0082] When the strip makes a step-by-step movement, it can ensure that the strip can be accurately positioned to the corresponding stamping station every time it moves, so as to meet the requirements of multi-step stamping. Specifically, there is an idle stroke between every two processes. When the forming part of the strip is in the idle stroke, multiple guiding pins 201 are inserted into the positioning holes 11 at the same time to complete the guiding and positioning process of the strip, ensuring that the forming part of the strip is in the best processing position in each bending step, and improving the accuracy of the finally formed double-fold spring piece.
[0083] Step S2: The punching unit B1 punches positioning holes 11 distributed at intervals on the strip;
[0084] Specifically, the front and rear positioning holes 11 in this step are spaced at the same interval, ensuring that the guiding pins 201 can accurately insert into the positioning holes 11, so that after each movement of the strip, the forming part is located below the processing unit.
[0085] Step S3: The first punching and cutting unit B2 strips the waste materials on both sides of the symmetry of the positioning holes 11, and the forming part is between the two positioning holes 11;
[0086] The diagonal piercing unit pierces an opening in the middle of the forming part, and then the second punching and cutting unit strips the waste materials at both ends of the forming part; specifically, it includes steps S4 and S5;
[0087] Step S4: The diagonal piercing unit A pierces an opening in the middle of the forming part;
[0088] Step S5: The second punching and cutting unit B3 strips the waste materials at both ends of the forming part;
[0089] Step S6: The first bending unit C punches and forms a first bent section in an S shape at one end far from the opening, and makes the included angle between the first bent section and the forming part a preset angle;
[0090] The second bending unit stamps the first bent section and the end of the forming part downward to a preset angle to form a second bent section, and the third bending unit stamps the second bent section and the other end of the forming part upward to a preset angle to form an upper folded part perpendicular to the connecting part and a lower folded part with a convex hull;
[0091] Step S7: The second bending unit D stamps the first bent section and the end of the forming part downward to a preset angle to form a second bent section;
[0092] Step S8: The third bending unit E stamps the second bent section and the other end of the forming part upward to a preset angle to form an upper folded part 2 perpendicular to the connecting part 1 and a lower folded part 3 with a convex hull;
[0093] The fourth bending unit stamps the lower folded part downward to a preset angle, and the fifth bending unit stamps the lower folded part upward to a preset angle to form an arc transition between the lower folded part and the connecting part; specifically including steps S9 to S10;
[0094] Step S9: The fourth bending unit F stamps the lower folded part 3 downward to a preset angle;
[0095] Step S10: The fifth bending unit G stamps the lower folded part 3 upward to a preset angle to form an arc transition 4 between the lower folded part 3 and the connecting part 1;
[0096] Step S11: The sixth bending unit H stamps the upper folded part 2 downward to a preset angle to make the upper folded part 2 parallel to the connecting part 1;
[0097] Step S12: The seventh bending unit I stamps the upper folded part 2 downward to a preset angle;
[0098] Step S13: The eighth bending unit J stamps the lower folded part 3 upward to a preset angle;
[0099] Step S14: The shearing unit K cuts off the connecting part along the edge of the double-folded reed unit to obtain the double-folded reed.
[0100] In summary, in a double-folded reed, a continuous forming stamping die and a processing method of the present invention, a full-continuous die is designed to perform step-by-step forming on a stamped profile, so as to batch obtain double-folded reeds with complex structures, solve the limitation that full-continuous production of complex double-folded reeds cannot be achieved in the prior art, greatly improve the product quality and production efficiency, save the labor cost and machine cost, and since the produced double-folded reed products pass through a multi-step bending die, the arc transition 4 can overcome the problem that the original shear edge has weak strength and manual shearing is required again, realizing the full-continuous production of complex reeds and greatly reducing the labor cost.
[0101] It should be understood that the application of the present application is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present application.
Claims
1. A double-folded spring, characterized in that: It comprises a reed body which is stamped and formed integrally in sequence, and the reed body comprises: A connecting portion, wherein a positioning hole is provided in the middle of the connecting portion; An upper folding portion, wherein an opening is provided in the middle of the upper folding portion, and a slanted plate connected to the upper folding portion is provided on a side wall of the opening, and the slanted plate is inclined toward one side of the connecting portion; The lower folding part, the upper folding part and the lower folding part are respectively connected to the two ends of the connecting part, the upper folding part and the lower folding part are in arc transition with the connecting part, and the middle part of the lower folding part is provided with a convex bump that bulges downwards.
2. A continuous forming stamping die, characterized in that: The continuous forming stamping die is used to continuously process The double-fold spring sheet as claimed in claim 1 comprises a mold body, wherein a punching unit, a first punching unit, an oblique piercing unit, a second punching unit, a step-by-step bending mechanism and a shearing unit for cutting off the waste material between the double-fold spring sheets are sequentially arranged in the middle part of the mold body along the forward direction of the material strip; the punching unit is used to punch out positioning holes on the material strip, the first punching unit and the second punching unit are used to punch the material strip into spaced forming parts and connecting parts, the step-by-step bending mechanism is used to perform multiple bending processes on the forming parts to form the double-fold spring sheet unit, and the shearing unit is used to cut off the connecting part between the double-fold spring sheet unit and the material strip along the edge of the double-fold spring sheet unit.
3. The continuous forming stamping die according to claim 2, characterized in that: The mold body includes an upper mold and a lower mold that are relatively arranged up and down. The upper mold includes an upper mold base, an upper pad and an upper clamping plate connected in sequence from top to bottom. The lower mold includes a stripping plate, a lower mold plate, a lower pad and a lower mold base connected in sequence from top to bottom.
4. The continuous forming stamping die according to claim 3, characterized in that: The step-by-step bending mechanism comprises a first bending unit, a second bending unit, a third bending unit, a fourth bending unit, a fifth bending unit, a sixth bending unit, a seventh bending unit and an eighth bending unit which are arranged at intervals along the advancing direction of the material strip; The first bending unit and the second bending unit are respectively used to punch out arcs at both ends of the forming part, and the third bending unit is used to punch the two ends of the forming part upward to form an upper folding part and a lower folding part with a convex hull. The fourth bending unit, the fifth bending unit, and the eighth bending unit bend the lower folding part in steps, and the sixth bending unit and the seventh bending unit bend the upper folding part in steps.
5. The continuous forming stamping die according to claim 4, characterized in that: The punching unit includes a step punch and a die blade, the step punch is fixed to the upper clamping plate, the die blade corresponds to the step punch and is arranged on the lower template, and the material strip is located on the lower template; When the upper die moves downward, the step punch simultaneously passes through the material strip downward to punch out the positioning hole thereon, and a hollow air inlet channel is formed in the middle of the step punch, and the air inlet channel is connected with the air outlet at the bottom of the step punch. The airflow blown out through the air outlet blows the waste material on the top of the step punch into the die edge.
6. The continuous forming stamping die according to claim 4, characterized in that: The first bending unit includes a first forming convex die, a stripping block, a first spring, a first push rod and a forming die, the first forming convex die is arranged on the upper clamping plate, the forming die is correspondingly arranged on the lower template, the stripping block is fixed in the upper clamping plate, the first push rod and the first spring are successively fixed on the side of the stripping block away from the forming die, and the material strip is located on the upper side of the forming die; When the upper die moves downward, the stripping block presses the forming portion of the material strip under the action of the first spring and the first ejector rod, and the first forming convex die presses the material strip into the forming concave die to achieve bending.
7. The continuous forming stamping die according to claim 4, characterized in that: The sixth bending unit comprises a first plunger, a stopper, a second spring, a first horizontal punch, a third spring, a second push rod and a second horizontal punch, the first plunger is fixed to the side of the upper clamping plate and extends downward, the stopper is fixed to the lower die seat and abuts against the side of the first plunger away from the material strip, the first horizontal punch is arranged on one side of the first plunger and is horizontally movably fixed to one side of the lower template through the second spring, the second horizontal punch is relatively arranged on the opposite side of the first horizontal punch, the second horizontal punch is rotatably fixed to the lower template, the second push rod and the third spring are sequentially arranged at the lower side of the second horizontal punch, and the material strip is located between the first horizontal punch and the second horizontal punch; When the upper die moves downward, the first horizontal punch moves toward one side of the material strip under the guidance of the first insert knife, and bends the material strip under the opposite action of the second horizontal punch. When the upper die moves upward, the second horizontal punch rotates around the rotation axis under the action of the second ejector rod and the third spring to allow the material strip to pass.
8. The continuous forming stamping die according to claim 4, characterized in that: The oblique piercing unit comprises an opening die, a second inserting knife, a third push rod, a fourth spring, a fifth spring, a driving block, a punch insert, a piercing punch and a sixth spring. The middle part of the opening die forms a die inner hole. The opening die is movably arranged on the upper clamping plate. The third push rod and the fourth spring are sequentially connected to the opening die away from the material strip. The second inserting knife is fixed to the side of the upper clamping plate and extends downward. The driving block is L-shaped. The end face of the driving block abuts against the inclined surface of the second inserting knife. The two ends of the fifth spring are respectively connected to the side wall of the driving block and the side face of the upper template. The punch insert is arranged on the upper side of the driving block. The piercing punch is fixed on the punch insert and arranged corresponding to the die inner hole. The material strip is located between the opening die and the piercing punch. When the upper die moves downward, the second plunger moves downward, and the driving block moves upward under the action of the inclined surface of the second plunger, driving the piercing punch to enter the inner hole of the die to pierce the material strip.
9. The continuous forming stamping die according to claim 4, characterized in that: Guide needles corresponding to the positioning holes are arranged between the punching unit, the first cutting unit, the oblique puncturing unit, the second cutting unit, the first bending unit, the second bending unit, the third bending unit, the fourth bending unit, the fifth bending unit, the sixth bending unit, the seventh bending unit and the eighth bending unit.
10. A method for processing a double-folded spring leaf, using a continuous forming stamping die as claimed in any one of claims 4 to 9, characterized in that: The following steps are involved: The material strip is driven to move stepwise in a single direction in the continuous forming stamping die, and the punching unit punches a plurality of positioning holes distributed at intervals on the material strip, and the first punching unit peels off the waste material on both sides of the symmetrical positioning holes, so that a forming portion is formed between two adjacent positioning holes; The oblique piercing unit pierces an opening in the middle of the forming part, and then the second punching unit peels off the waste materials at both ends of the forming part; The first bending unit punches out an S-shaped first bending section at an end away from the opening, and makes the angle between the first bending section and the forming portion be a preset angle; The second bending unit punches the first bending section and the end of the forming portion downward to a preset angle to form a second bending section, and the third bending unit punches the second bending section and the other end of the forming portion upward to a preset angle to form an upper folding portion perpendicular to the connecting portion and a lower folding portion with a convex bulge; The fourth bending unit punches the lower folding portion downward to a preset angle, and the fifth bending unit punches the lower folding portion upward to a preset angle to form an arc transition between the lower folding portion and the connecting portion; The sixth bending unit punches the upper folding portion downward to a preset angle so that the upper folding portion is parallel to the connecting portion; The seventh bending unit punches the upper folding portion downward to a preset angle, and the eighth bending unit punches the lower folding portion upward to a preset angle; The shearing unit cuts off the connecting portion along the edge of the double-folded spring sheet unit to obtain the double-folded spring sheet.