Punch-draw top material mechanism

Abstract

This utility model discloses a stamping and stretching ejection mechanism, including an upper mold and a lower mold. The lower mold has a mold groove and a receiving groove. The ejection unit includes an ejector frame disposed in the receiving groove and an operating arm hinged in the lower mold for driving the ejector frame to rise. One end of the ejector frame is located on the periphery of the mold groove, and the operating arm is located at the bottom of the lower mold. The end of the operating arm inside the lower mold abuts against the bottom end of the ejector frame, and the other end is located outside the lower mold. A protective unit is disposed on one side of the lower mold to protect the end of the operating arm located outside the lower mold. By placing one end of the ejector frame on the periphery of the mold groove, the ejection operation is performed from the periphery of the workpiece, avoiding direct contact with the forming surface, thereby reducing damage to the formed workpiece and solving the problem that traditional ejection structures may leave indentations or damage on the forming surface.

Description

Technical Field

[0001] This utility model relates to the field of stamping processing technology, and specifically to a stamping stretching ejector mechanism. Background Technology

[0002] During the stamping and stretching process, after the stamping and stretching is completed, the workpiece often adheres tightly to the upper surface of the die due to the formed shape, adsorption force, etc., and needs to be removed manually or with the help of tools.

[0003] For example, CN219523183U discloses an ejector mechanism for a stamping die, which includes a bracket, a lower die housed within the bracket, a push plate slidably fitted within the bracket, an electric push rod fixedly connected within the bracket, the output end of the electric push rod being fixedly connected to the push plate, multiple ejector rods mounted on the upper side of the push plate, one end of each ejector rod being located within the lower die, and two scrap boxes mounted on the lower side of the lower die, with two cover plates slidably fitted on the upper side of the scrap boxes, and a pull rod rotatably fitted between the cover plates and the push plate, and multiple limiting rods housed within the bracket, with the limiting rods slidably fitted with the push plate; this reduces the pressure received by a single ejector rod and extends the service life of the ejector rod.

[0004] However, the above-mentioned device directly contacts the forming surface of the workpiece through the push rod, which can easily damage the forming workpiece during the lifting process and affect the quality of the finished product. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a stamping and stretching ejector mechanism to solve the problem that the traditional ejector structure in the existing technology directly contacts the forming surface of the workpiece, which easily damages the forming workpiece during the lifting process.

[0006] According to an embodiment of the present invention, a stamping and stretching ejection mechanism includes an upper mold and a lower mold. The lower mold has a mold groove and a receiving groove. The ejection unit includes a ejector frame disposed in the receiving groove and an operating arm hinged in the lower mold for driving the ejector frame to rise. One end of the ejector frame is located on the periphery of the mold groove, and the operating arm is located at the bottom of the lower mold. One end of the operating arm located in the lower mold abuts against the bottom end of the ejector frame, and the other end is located outside the lower mold. A protective unit is disposed on one side of the lower mold for protecting the end of the operating arm located outside the lower mold.

[0007] Compared with the prior art, the present invention has the following advantages: by setting one end of the ejector frame on the periphery of the mold groove, the ejection operation is performed from the periphery of the workpiece during ejection, avoiding direct contact with the forming surface, thereby reducing damage to the formed workpiece and solving the problem that traditional ejection structures may leave indentations or damage on the forming surface.

[0008] Preferably, the receiving groove includes a placement groove formed in the lower mold, a stroke groove formed vertically on the periphery of the mold groove, and a rectangular groove formed horizontally at the bottom of the lower mold, wherein the stroke groove and the rectangular groove are both connected to the placement groove.

[0009] Preferably, the top frame includes a base plate movably disposed in the placement groove and multiple sets of top arms disposed on the base plate, as well as protrusions disposed at the bottom of the base plate, with each top arm located in a corresponding stroke groove.

[0010] Preferably, the operating arm includes an abutment section, an arc section, and a stepping section, which are fixedly connected in sequence. The arc sections are located within a rectangular groove and are hinged to the rectangular groove. One end of the abutment section abuts against a protrusion, and the stepping section is located outside the rectangular groove.

[0011] Preferably, at least one set of reset springs is provided at the bottom of the base plate, and the other end of the reset springs is connected to the lower mold.

[0012] Preferably, the protective unit includes a protective cover disposed on one side of the lower mold, and the stepping section is located inside the protective cover.

[0013] Preferably, the protective cover is provided with a slide rail, the height of which is two-thirds of the height of the protective cover, and a baffle is provided inside the slide rail.

[0014] Preferably, a rubber pad is provided at the top of each top arm. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0016] Figure 2 This is an exploded structural diagram of an embodiment of the present invention.

[0017] Figure 3 This is a full-view projection of an embodiment of the present utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the top frame in an embodiment of the present utility model.

[0019] The reference numerals in the accompanying drawings of the instruction manual include: 1. Lower mold; 11. Upper mold; 12. Storage groove; 121. Stroke groove; 122. Placement groove; 123. Rectangular groove; 2. Protective cover; 21. Slide rail; 22. Baffle; 3. Top frame; 31. Top arm; 32. Base plate; 33. Rubber pad; 34. Protrusion; 35. Reset spring; 4. Operating arm; 41. Abutment section; 42. Arc-shaped section; 43. Stepping section. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 4 As shown in the figure, this utility model embodiment proposes a stamping and stretching ejection mechanism, which includes an upper mold 11 and a lower mold 1. The lower mold 1 has a mold groove and a receiving groove 12. The ejection unit includes an ejector frame 3 disposed in the receiving groove 12 and an operating arm 4 hinged in the lower mold 1 for driving the ejector frame 3 to rise. One end of the ejector frame 3 is located on the periphery of the mold groove, and the operating arm 4 is located at the bottom of the lower mold 1. The end of the operating arm 4 located in the lower mold 1 abuts against the bottom end of the ejector frame 3, and the other end is located outside the lower mold 1. A protective unit is disposed on one side of the lower mold 1 for protecting the end of the operating arm 4 located outside the lower mold 1.

[0022] The detailed working process of this embodiment is as follows: the upper mold 11 and the lower mold 1 are used to stamp the workpiece. The top frame 3 set on the periphery of the mold groove is driven by the operating arm 4. The operating arm 4, which is hinged in the lower mold 1, drives the top frame 3 to rise through the lever principle, lifting the workpiece adsorbed in the lower mold 1. After the operating arm 4 is released, the top frame 3 returns to its original position under the action of gravity, so that a new workpiece can be stamped.

[0023] The upper mold 11 descends and closes with the lower mold 1, stamping and stretching the sheet metal placed in the mold groove. At this time, the ejector unit 3 is completely housed in the receiving groove 12 of the lower mold, with its top end flush with or slightly lower than the bottom of the mold groove, ensuring that the forming process of the workpiece is not affected. After stamping, the upper mold 11 moves upward and opens. At this time, the end of the drive arm 4 located outside the lower mold 1 (power input end) rotates around the hinge point using the lever principle. Since the end of the drive arm 4 located inside the lower mold 1 abuts against the bottom end of the ejector 3, the rotation of the drive arm 4 is converted into the vertical upward movement of the ejector 3. The ejector 3 extends upward from the receiving groove 12, and its end located on the periphery of the mold groove gradually contacts and lifts the edge of the formed workpiece, completing the demolding.

[0024] With the protective unit in place, accidental contact with the operating arm 4 is prevented, thus avoiding disruption of the stamping process.

[0025] like Figure 2 and Figure 3 As shown, the storage slot 12 includes a placement slot 122 formed in the lower mold 1, a stroke slot 121 formed vertically on the periphery of the mold slot, and a rectangular slot 123 formed horizontally at the bottom of the lower mold 1. The stroke slot 121 and the rectangular slot 123 are both connected to the placement slot 122.

[0026] The detailed working process of this embodiment is as follows: the placement slot 122 provides storage space for the top frame 3, so that it can be completely contained inside the mold when not in use, ensuring the flatness of the mold surface and avoiding interference with the stamping and stretching process; the rectangular slot 123 provides operating space for the operating arm 4.

[0027] like Figure 3 and Figure 4 As shown, the top frame 3 includes a base plate 32 movably disposed in the placement groove 122 and multiple sets of top arms 31 disposed on the base plate 32, as well as a protrusion 34 disposed at the bottom of the base plate 32. Each top arm 31 is located in a corresponding stroke groove 121.

[0028] The detailed working process of this embodiment is as follows: The base plate 32 is movably disposed within the placement slot 122. As the basic component of the top frame 3, it provides an installation platform for other components. Its engagement with the placement slot 122 allows the base plate 32 to move flexibly within the slot to accommodate the rising and falling movements of the top frame 3. Simultaneously, the size and shape of the base plate 32 match the placement slot 122, ensuring stability during movement and preventing swaying or displacement, thus ensuring the movement accuracy of the top frame 3. The protrusion 34 located at the bottom of the base plate 32 is a connecting component between the top frame 3 and the operating arm 4; its presence allows the operating arm 4 to drive the top frame 3 to rise and fall by abutting against the protrusion 34.

[0029] like Figure 3 As shown, the operating arm 4 includes an abutment section 41, an arc-shaped section 42, and a stepping section 43. The abutment section 41, the arc-shaped section 42, and the stepping section 43 are fixedly connected in sequence. The arc-shaped section 42 is located inside the rectangular groove 123 and is hinged to the rectangular groove 123. One end of the abutment section 41 abuts against the protrusion 34, and the stepping section 43 is located outside the rectangular groove 123.

[0030] The detailed working process of this embodiment is as follows: One end of the abutting section 41 abuts against the protrusion 34, and its function is to transmit the movement of the operating arm 4 to the top frame 3. The design of the abutting section 41 ensures effective contact with the protrusion 34, and can stably transmit the force of the operating arm 4 to the top frame 3, realizing the upward and downward movement of the top frame 3. The arc-shaped section 42 is hinged to the rectangular groove 123, and the arc-shaped section 42 is located inside the rectangular groove 123. The design of the arc-shaped section allows the operating arm to rotate flexibly around the hinge point, realizing the movement conversion of the operating arm. The stepping section 43 is located outside the rectangular groove 123, which makes it convenient for the operator to apply external force to drive the operating arm 4 to rotate. Its position and shape design take into account the ergonomic principles, so that the operator can easily step on it and realize the rotation of the operating arm 4 by applying a small force, thereby driving the top frame 3 to rise.

[0031] like Figure 3 and Figure 4 As shown, at least one set of reset springs 35 are provided at the bottom of the base plate 32, and the other end of the reset springs 35 is connected to the lower mold 1.

[0032] The detailed working process of this embodiment is as follows: With the reset spring 35 in place, when the operating arm 4 no longer applies an upward force to the top frame 3, the reset spring 35 generates tension, causing the bottom plate 32 of the top frame 3 to move downward, driving the top arm 31 back to its initial position. This ensures that the top frame 3 can accurately reset after each ejection action, so that the top frame 3 is completely housed in the receiving groove 12 of the lower mold, ensuring that its top is flush with or slightly lower than the bottom of the mold groove, ensuring that it does not affect the forming process of the workpiece.

[0033] like Figure 2 As shown, the protective unit includes a protective cover 2 disposed on one side of the lower mold 1, and the stepping section 43 is located inside the protective cover 2.

[0034] like Figure 2 As shown, a slide rail 21 is provided on the protective cover 2. The height of the slide rail 21 is two-thirds of the height of the protective cover 2. A baffle 22 is provided inside the slide rail 21.

[0035] The detailed working process of this embodiment is as follows: With the baffle 22 in place, the stepping section 43 is located inside the protective cover 2, which can effectively prevent the operator from accidentally touching the moving stepping section during operation, avoiding safety accidents such as hand pinching and collision caused by the movement of the stepping section. When it is necessary to step on the operating arm 4, place your foot inside the protective cover 2, with the back of your foot against the baffle 22, and tilt your foot upward to open the baffle 22, then step on the operating arm 4 and lift the workpiece.

[0036] like Figure 2 As shown, each top arm 31 is provided with a rubber pad 33 at its top.

[0037] The detailed working process of this embodiment is as follows: With the rubber pad 33 set, the rubber pad 33 can avoid direct contact between the top arm and the workpiece, prevent the top arm from causing scratches, indentations and other damage to the surface of the workpiece, thereby ensuring the surface quality of the workpiece. At the same time, during the ejection process, the rubber pad 33 can play a buffering role and reduce the impact between the top arm 31 and the workpiece.

[0038] The implementation principle of this application embodiment is as follows: After the stamping is completed, the upper mold 11 moves upward and opens, and then the step section 43 is stepped down. Using the lever principle, the operating arm 4 rotates around the hinge point. Since the end of the operating arm 4 located in the lower mold 1 abuts against the bottom end of the top frame 3, the rotation of the operating arm 4 will be converted into the vertical upward movement of the top frame 3. The top frame 3 extends upward from the receiving groove 12, and its end located on the periphery of the mold groove gradually contacts and lifts the edge of the formed workpiece, thus completing the demolding.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A stamping and drawing ejector mechanism, comprising an upper die (11) and a lower die (1), wherein the lower die (1) has a die groove, characterized in that: The lower mold (1) is provided with a storage groove (12); The top material unit includes a top frame (3) disposed in the receiving groove (12) and an operating arm (4) hinged in the lower mold (1) for driving the top frame (3) to rise. One end of the top frame (3) is located on the periphery of the mold groove, and the operating arm (4) is located at the bottom of the lower mold (1). One end of the operating arm (4) inside the lower mold (1) abuts against the bottom end of the top frame (3), and the other end is located outside the lower mold (1). A protective unit is provided on one side of the lower mold (1) to protect the end of the operating arm (4) located outside the lower mold (1).

2. The stamping and drawing ejector mechanism according to claim 1, characterized in that: The storage slot (12) includes a placement slot (122) opened in the lower mold (1) and a stroke slot (121) opened vertically on the periphery of the mold slot, and a rectangular slot (123) opened horizontally at the bottom of the lower mold (1), wherein the stroke slot (121) and the rectangular slot (123) are both connected to the placement slot (122).

3. The stamping and drawing ejector mechanism according to claim 2, characterized in that: The top frame (3) includes a base plate (32) movably disposed in the placement groove (122) and multiple sets of top arms (31) disposed on the base plate (32), as well as a protrusion (34) disposed at the bottom of the base plate (32), and each top arm (31) is located in the corresponding travel groove (121).

4. The stamping and drawing ejector mechanism according to claim 3, characterized in that: The operating arm (4) includes an abutment section (41), an arc section (42), and a stepping section (43). The abutment section (41), the arc section (42), and the stepping section (43) are fixedly connected in sequence. The arc section (42) is located inside the rectangular groove (123) and is hinged to the rectangular groove (123). One end of the abutment section (41) abuts against the protrusion (34), and the stepping section (43) is located outside the rectangular groove (123).

5. The stamping and drawing ejector mechanism according to claim 4, characterized in that: The bottom of the base plate (32) is provided with at least one set of reset springs (35), and the other end of the reset springs (35) is connected to the lower mold (1).

6. The stamping and drawing ejector mechanism according to claim 4, characterized in that: The protective unit includes a protective cover (2) disposed on one side of the lower mold (1), and the stepping section (43) is located inside the protective cover (2).

7. A stamping and drawing ejector mechanism according to claim 6, characterized in that: The protective cover (2) is provided with a slide rail (21), the height of which is two-thirds of the height of the protective cover (2), and a baffle (22) is provided inside the slide rail (21).

8. A stamping and drawing ejector mechanism according to claim 3, characterized in that: Each of the top arms (31) is provided with a rubber pad (33) at its top.

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