A stamping mechanism and method for automotive transmission components

Abstract

The application discloses a stamping mechanism and method for automobile gearbox accessories, which can effectively improve the precision and stability of convex stamping forming, the stress of a convex die core is extremely small, the service life of the convex die core is greatly prolonged, and the convex die core is not prone to collapse or deformation, in addition, the product is actively ejected from the die by the floating upper pad pushing the convex ejection rod to actively eject the product, which avoids the shutdown or product damage caused by material clamping, and ensures the continuity and consistency of the stamping rhythm.

Description

Technical Field

[0001] This invention relates to the field of automotive component stamping technology, and in particular to a stamping mechanism and method for automotive transmission parts. Background Technology

[0002] Stamping is a very common processing step in the production of automotive transmission parts, but current stamping mechanisms and methods still have some shortcomings: 1. In traditional single-stamping forming process, the forming error exceeds the tolerance when forming the convex bulge because the sheet metal is not fixed in advance; 2. During the convex bulge forming process, the mold is constantly subjected to large reverse pressure, which not only accelerates mold wear, but also easily causes the convex bulge to stick to the punch after the product is formed, increasing the difficulty of demolding, slowing down the overall processing rhythm, and affecting the continuous operation of automated production.

[0003] This not only reduces production efficiency but also decreases the precision and stability of stamping, thus severely impacting product yield, and therefore requires improvement. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A stamping method for automotive transmission parts is provided, the steps of which include: S1. The stripper plate descends under the action of the upper mold mechanism to contact and press down the floating plate push rod. The floating upper pad moves downward under the action of the floating plate push rod and compresses the spring. S2. The ejector bar loses the support of the floating upper pad plate, which drives the ejector die insert to move downward along the ejector die. At the same time, the ejector plate contacts the strip and presses and fixes the strip to the lower die mechanism. S3. The upper die mechanism continues to descend, and the upper punch of the convex hull extends out of the stripper plate to cooperate with the convex hull die to perform convex hull stamping on the strip. S4. After stamping is completed, the upper die mechanism moves upward, causing the stripper plate to gradually move upward; S5. The floating upper pad moves upward and resets under the action of spring force, and pushes the ejector rod and the die insert of the convex bulge to move upward synchronously; S6. The die insert of the punch rises upward to force the strip out of the punch die, so that the strip can move to the next station.

[0005] In a preferred embodiment of the present invention, a stamping mechanism is included, the stamping mechanism comprising: The upper mold mechanism includes an upper mold assembly, a stripper plate, and a convex upper punch. The stripper plate is elastically connected to the upper mold assembly. The upper end of the convex upper punch is fixedly connected to the upper mold assembly, and its lower end is movably connected to the stripper plate, so that the bottom of the convex upper punch extends out of or retracts into the stripper plate. The lower mold mechanism includes a lower mold assembly, a lower template, a convex mold cavity, a convex mold cavity insert, a convex ejector rod, and a floating assembly. The lower template is disposed on the lower mold assembly, and the convex mold cavity is disposed on the lower template. The convex mold cavity insert is movably disposed within the convex mold cavity. The convex ejector rod is movably connected to the lower mold assembly, and its lower end is movably connected to the floating assembly, while its upper end extends into the convex mold cavity and is connected to the convex mold cavity insert. The floating assembly includes a lower floating pad, an upper floating pad, an elastic element, and a floating plate push rod. The lower floating pad is fixedly connected to the lower die assembly. The upper floating pad is located on the lower floating pad and is connected to the lower floating pad via the elastic element. The bottom of the floating plate push rod contacts the upper floating pad, and its upper end passes through the lower die assembly and is movably connected to the lower die plate to extend or retract. The bottom of the ejector bar contacts the upper floating pad, causing the floating plate push rod, the ejector bar, and the ejector die insert to move up and down relative to the ejector die under the action of the floating assembly, thereby enabling the ejector die insert to cooperate with the upper punch for stamping.

[0006] In a preferred embodiment of the present invention, the upper mold assembly includes an upper mold base, an upper pad, and an upper clamping plate. The upper pad is fixedly connected to the bottom surface of the upper mold base, and the upper clamping plate is fixedly connected to the bottom surface of the upper pad.

[0007] In a preferred embodiment of the present invention, the top surface of the stripping plate is provided with a stop plate that contacts the upper clamping plate.

[0008] In a preferred embodiment of the present invention, the upper punch of the convex bulge is fixedly connected to the upper pad or the upper clamping plate through a punch clamping plate.

[0009] In a preferred embodiment of the present invention, the lower mold assembly includes a base, a lower mold base, and a lower pad. The lower mold base is fixedly connected to the base, the lower pad is fixedly connected to the top surface of the lower mold base, and the lower mold plate is fixedly installed on the lower pad.

[0010] In a preferred embodiment of the present invention, the base includes a lower pad and a lower support plate, wherein the upper end of the lower pad is fixedly connected to the lower mold base and the lower end is fixedly connected to the lower support plate.

[0011] In a preferred embodiment of the present invention, the floating lower pad is fixedly connected to the lower mold assembly below by equal-height screws.

[0012] The beneficial effects of this invention are: by rationally designing and formulating multiple different process sequences and specific operations such as positioning, bending, flipping, flipping, cutting the shape, and punching, it not only effectively improves production efficiency, but also improves stamping accuracy and stability, and effectively enhances the dimensional accuracy, symmetry and batch consistency of the spring sheet. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the mold opening structure of a preferred embodiment of the stamping mechanism and method for automotive transmission parts according to the present invention; Figure 2 This is a schematic diagram of the mold closing structure of a preferred embodiment of the stamping mechanism and method for automotive transmission parts according to the present invention. Detailed Implementation

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figure 1 The embodiments of the present invention include: A stamping mechanism for automotive transmission parts, comprising an upper die mechanism and a lower die mechanism.

[0016] The upper die mechanism includes an upper die base 11, an upper backing plate 12, an upper clamping plate 13, a stop plate 14, a stripper plate 15, a punch clamping plate 16, and an upper punch for the convex shroud 17.

[0017] An upper pad is fixedly connected to the bottom surface of the upper mold base, an upper clamping plate is fixedly connected to the bottom surface of the upper pad, a stop plate is movably connected to the upper mold base / upper pad through springs and other elastic elements, and a stripper plate is fixedly connected to the bottom surface of the stop plate.

[0018] The punch clamp is fixedly connected to the upper pad or upper clamp. The upper end of the punch on the convex burr is fixedly connected to the punch clamp, and its lower end passes through the stop plate and is movably connected to the stripper plate, so that the bottom of the punch on the convex burr can extend or retract into the stripper plate.

[0019] The lower mold mechanism includes a base, a lower mold base 21, a lower pad 22, a lower template 23, a convex mold 24, a convex mold insert 25, a convex stripper rod 26, and a floating assembly.

[0020] The lower backing plate is fixedly connected to the top surface of the lower mold base, the lower template is fixedly installed on the lower backing plate, and a convex mold is provided on the lower template. The convex mold insert is movably set inside the convex mold. The convex stripper is movably connected to the lower mold base, and the lower end of the convex stripper is movably connected to the floating component. The upper end of the convex stripper passes through the lower backing plate and extends into the convex mold, and is fixedly connected to the convex mold insert.

[0021] The floating assembly includes a lower floating pad 271, an upper floating pad 272, a spring 273, a height equalizing screw 274, and a floating plate push rod 275. The lower floating pad is fixedly connected to the lower mold base by the height equalizing screw. The upper floating pad is located between the lower mold base and the lower floating pad and is elastically connected to the lower floating pad by the spring.

[0022] The floating plate ejector rod is movably connected to the lower die base. Its bottom contacts the floating upper pad plate, and its upper end passes through the lower pad plate and is movably connected to the lower die plate to extend or retract the lower die plate. The bottom of the ejector rod contacts the floating upper pad plate, so that the ejector rod and the ejector die insert move up and down relative to the ejector die under the action of the floating assembly to extend or retract the ejector die, thereby cooperating with the upper punch of the ejector to perform stamping.

[0023] Furthermore, the base includes a lower foot 28 and a lower support plate 29. The upper end of the lower foot is fixedly connected to the lower mold base, and the lower end is fixedly connected to the lower support plate.

[0024] A stamping mechanism and method for automotive transmission parts, comprising the following steps: When strip 3 moves to the stamping position, the upper die mechanism descends, and the stripper plate contacts the strip first, pressing and fixing the strip onto the lower die plate, thus achieving the action of pressing the strip first. At this time, the floating plate push rod descends under the action of the stripper plate and presses against the floating upper pad, causing the floating upper pad to move downward against the spring force. As the floating upper pad moves downward, the convex stripper rod loses its support, driving the convex die insert to move downward along the convex die. At this time, the convex forming area is in a "zero back pressure" state without back pressure. Then the upper die mechanism continues to descend, and the convex upper punch extends out of the stripper plate to cooperate with the convex die to perform convex stamping forming on the strip. After stamping is completed, the upper die mechanism rises and returns, and the stripper plate gradually moves upward. At this time, the floating upper pad is reset upward under the action of spring force, and pushes the ejector rod and the die insert of the convex bulge to move upward synchronously. The die insert of the convex bulge pushes out the formed convex part upward, forcibly removing the product from the convex bulge die, avoiding the convex bulge from getting stuck in the die and causing a "lock-up" problem, ensuring that the strip can move normally to the next process, and ensuring the continuous and stable operation of automated stamping production.

[0025] Compared with traditional processes, the stamping mechanism and method for automotive transmission parts of this invention have the following main advantages: 1. Achieve "pressing material first, then molding" to eliminate molding interference. When the mold is closed, the stripper plate first firmly presses the floating upper pad and the product strip into the lower mold, and then the upper punch of the convex shroud actually cuts into the convex shroud die. This avoids misalignment and warping caused by the material not being fixed during the downward movement of the upper punch of the convex shroud, and ensures the dimensional accuracy of the convex shroud position from the source.

[0026] 2. The convex bulge forming process is in a "zero back pressure" state, protecting the mold and the product. At the moment of forming, the spring is fully compressed, and the convex die insert is not supported by the upward ejection force. The stamping force required for convex forming is entirely provided by the punch press, and it will not be damaged due to the confrontation between the ejection force and the stamping force. The convex die insert is subjected to very little force, which greatly extends the service life of precision inserts and makes it less prone to collapse or deformation.

[0027] 3. Forced material removal solves the problem of "locking" of protrusions. The convex forming process is a deep drawing / bulging process, in which the material tightly binds the punch. However, when the mold is opened in this application, the spring releases energy and pushes the convex ejector rod through the floating upper pad to actively eject the product from the die. This active ejection mechanism ensures that the product can smoothly leave the mold and avoids machine stoppage or product damage caused by jamming.

[0028] 4. Improve the stability of automated production Because the product is automatically ejected to a certain height after the mold is opened, the continuity and consistency of the stamping cycle are ensured.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A stamping method for automotive transmission parts, characterized in that the steps include... include: S1. The stripper plate descends under the action of the upper mold mechanism to contact and press down the floating plate push rod. The floating upper pad moves downward under the action of the floating plate push rod and compresses the spring. S2. The ejector bar loses the support of the floating upper pad plate, which drives the ejector die insert to move downward along the ejector die. At the same time, the ejector plate contacts the strip and presses and fixes the strip to the lower die mechanism. S3. The upper die mechanism continues to descend, and the upper punch of the convex hull extends out of the stripper plate to cooperate with the convex hull die to perform convex hull stamping on the strip. S4. After stamping is completed, the upper die mechanism moves upward, causing the stripper plate to gradually move upward; S5. The floating upper pad moves upward and resets under the action of spring force, and pushes the ejector rod and the die insert of the convex bulge to move upward synchronously; S6. The die insert of the punch rises upward to force the strip out of the punch die, so that the strip can move to the next station.

2. The stamping and method for automotive transmission parts according to claim 1, characterized in that, Includes a stamping mechanism, the stamping mechanism comprising: The upper mold mechanism includes an upper mold assembly, a stripper plate, and a convex upper punch. The stripper plate is elastically connected to the upper mold assembly. The upper end of the convex upper punch is fixedly connected to the upper mold assembly, and its lower end is movably connected to the stripper plate, so that the bottom of the convex upper punch extends out of or retracts into the stripper plate. The lower mold mechanism includes a lower mold assembly, a lower template, a convex mold cavity, a convex mold cavity insert, a convex ejector rod, and a floating assembly. The lower template is disposed on the lower mold assembly, and the convex mold cavity is disposed on the lower template. The convex mold cavity insert is movably disposed within the convex mold cavity. The convex ejector rod is movably connected to the lower mold assembly, and its lower end is movably connected to the floating assembly, while its upper end extends into the convex mold cavity and is connected to the convex mold cavity insert. The floating assembly includes a lower floating pad, an upper floating pad, an elastic element, and a floating plate push rod. The lower floating pad is fixedly connected to the lower die assembly. The upper floating pad is located on the lower floating pad and is connected to the lower floating pad via the elastic element. The bottom of the floating plate push rod contacts the upper floating pad, and its upper end passes through the lower die assembly and is movably connected to the lower die plate to extend or retract. The bottom of the ejector bar contacts the upper floating pad, causing the floating plate push rod, the ejector bar, and the ejector die insert to move up and down relative to the ejector die under the action of the floating assembly, thereby enabling the ejector die insert to cooperate with the upper punch for stamping.

3. The stamping and method for automotive transmission parts according to claim 2, characterized in that, The upper mold assembly includes an upper mold base, an upper pad, and an upper clamping plate. The upper pad is fixedly connected to the bottom surface of the upper mold base, and the upper clamping plate is fixedly connected to the bottom surface of the upper pad.

4. The stamping and method for automotive transmission parts according to claim 3, characterized in that, The top surface of the stripping plate is provided with a stop plate that contacts the upper clamping plate.

5. The stamping and method for automotive transmission parts according to claim 3, characterized in that, The punch on the convex bulge is fixedly connected to the upper pad or the upper clamping plate via a punch clamp.

6. The stamping and method for automotive transmission parts according to claim 1, characterized in that, The lower mold assembly includes a base, a lower mold base, and a lower pad. The lower mold base is fixedly connected to the base, the lower pad is fixedly connected to the top surface of the lower mold base, and the lower mold plate is fixedly installed on the lower pad.

7. The stamping and method for automotive transmission parts according to claim 6, characterized in that, The base includes a lower pad and a lower support plate. The upper end of the lower pad is fixedly connected to the lower mold base, and the lower end is fixedly connected to the lower support plate.

8. The stamping and method for automotive transmission parts according to claim 1, characterized in that, The floating lower pad is fixedly connected to the lower mold assembly below by equal-height screws.

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