Mechanism for preventing part from moving during demolding

Abstract

The utility model discloses a mechanism for preventing parts from moving during demolding, and belongs to the technical field of part stamping. The mechanism comprises an ejection mechanism fixed in the lower die and a pressing mechanism fixed in the upper die. The ejection mechanism is driven by an air cylinder, the material pressing mechanism is driven by a spring and stretches out and draws back automatically, the ejection mechanism is matched with the material pressing mechanism, a formed part is clamped at the moment of demolding, the formed part is separated from a male die and a female die, and then the part is loosened, so that the part is effectively prevented from moving in the demolding process, it is guaranteed that a mechanical arm grabs the part accurately, and the demolding efficiency is improved. And the stamping production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of parts stamping technology, specifically a mechanism for preventing parts from shifting during demolding, which can be widely used in various parts stamping processes. Background Technology

[0002] Stamping is a commonly used processing method in parts manufacturing. It utilizes the cooperation between the punch and die of a stamping die to form parts. With the continuous improvement of industrial level, the continuous increase in stamping speed, and the cooperation of robotic arms, higher requirements are placed on the stamping process.

[0003] During processing, the part to be stamped is first placed on the blank holder. The upper die moves downwards, pressing the blank holder to form the part. Due to the increased stamping speed, at the moment of demolding, the upper die pulls the formed part upwards and then falls down. For hollow parts with a high center of gravity, the blank holder cannot accurately position the part. In automated production, because the position of the formed part is not precise enough, the robot arm cannot accurately grasp the part, resulting in grasping failure and damage to the part.

[0004] Chinese utility model patent CN 217941578 U discloses a drawing die positioning device that fixes the blank by means of hooks, but this can only fix the blank before forming. Chinese utility model patent CN 206763744 U discloses a drawing die that prevents the blank from shifting during the finishing process. Neither of these structures can achieve the goal of positioning and fixing the formed part. Utility Model Content

[0005] To better address the aforementioned technical problems, this utility model provides a mechanism to prevent parts from shifting during demolding. This mechanism clamps and secures the molded part during demolding, and then releases it after demolding is complete, preventing the part from shifting and facilitating gripping by a robotic arm.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mechanism to prevent parts from shifting during demolding includes a lower die, an upper die, and a pressure ring. The lower die includes a die base and a punch, with the punch positioned at the center of the upper plane of the die base. The pressure ring surrounds the punch and is arranged in a U-shape on the die base. The upper die includes an upper die base and a die cavity disposed within the upper die base, with the die cavity corresponding to the punch. An automatically ejecting mechanism is also provided within the cavity of the punch; in the retracted state, the upper plane of the ejecting mechanism is not higher than the forming surface of the punch. A blank holder mechanism is also provided within the die cavity; in the retracted state, the lower surface of the blank holder mechanism does not extend beyond the forming surface of the die cavity.

[0008] Its effect is as follows: during demolding, as the pressure ring and upper die are raised, the ejector mechanism ejects simultaneously, and the pressure plate mechanism automatically pops out, pressing the molded part firmly, so that the molded part is completely separated from the punch and die, preventing the part from moving. As the upper die continues to rise, the pressure plate mechanism completely separates from the molded part, releasing the molded part.

[0009] Furthermore, the ejection mechanism includes a cylinder and a mounting base, with the cylinder fixed to the mounting base by bolts and the mounting base fixed to the lower part of the punch.

[0010] Its effect is that during demolding, as the upper mold and pressure ring are lifted, the cylinder pushes out and the clamping mechanism pops out, thereby clamping the part and preventing it from moving.

[0011] Furthermore, a push rod is fixed at the front end of the cylinder.

[0012] Its effect is to reduce production and maintenance costs; when the upper surface of the push rod is worn or damaged, the push rod can be replaced.

[0013] Furthermore, a groove is provided on the upper surface of the top rod, and a magnet is placed in the groove.

[0014] Its effect is that the magnet has a certain attraction effect on the metal parts, further preventing the parts from moving around.

[0015] Furthermore, a guide groove is provided on one side of the ejector pin, and a limit block is also provided on the punch.

[0016] Its effect is that, during the extension of the push rod, the cooperation between the guide groove and the limiting rod prevents the push rod from rotating, thereby further reducing the movement of parts.

[0017] The clamping mechanism includes a spring support, a spring, and a clamping pin. The spring support is fixed to the upper mold, and a spring is installed inside the spring support. A spring cover plate is provided at the rear of the spring support, which fixes the spring inside the spring support. A through hole is also provided at the front end of the spring support, through which the clamping pin extends and retracts. A boss is provided at the rear end of the clamping pin to prevent the clamping pin from popping out of the spring support. When the front end of the clamping pin extends, it cooperates with the ejection mechanism to clamp the part at the moment of demolding.

[0018] Its effect is that when the upper die is pressed down, the pressure pin automatically retracts, without affecting the stamping of the part. After the stamping is completed, the upper die is lifted up, and the pressure pin automatically pops out, pushing the part away from the upper die and pressing the part onto the ejection mechanism, preventing the upper die from driving the part, thereby preventing the part from moving.

[0019] Furthermore, the spring support is a cavity formed inside the upper mold, and a through hole is provided at the front end of the cavity. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the installation position of this utility model inside the mold;

[0021] Figure 2 This is a perspective view of the present utility model;

[0022] Figure 3 This is a front view of the ejection mechanism of this utility model;

[0023] Figure 4 This is a left view of the ejection mechanism of this utility model;

[0024] Figure 5 This is a front view of the pressing mechanism of this utility model;

[0025] 1. Ejection mechanism; 11. Mounting base; 12. Cylinder; 13. Ejector rod; 131. Guide groove; 15. Limiting block; 16. Magnet; 17. Groove

[0026] 2. Pressing mechanism; 21. Spring support; 211. Cavity; 212. Through hole; 22. Spring cover plate; 23. Pressing pin; 231. Boss; 24. Spring.

[0027] 7. Pressure ring; 8. Upper die; 81. Upper die base; 82. Die cavity; 9. Lower die; 91. Die base; 93. Punch; Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] To better explain the positional effect of this utility model Figure 1 The upper and lower molds were cut open.

[0030] like Figure 1 As shown, this invention provides a mechanism to prevent parts from shifting during demolding, comprising a lower mold 9, an upper mold 8, and a pressure ring 7. The lower mold 9 includes a mold base 91 and a punch 93, with the punch 93 positioned at the center of the upper plane of the mold base 91. The pressure ring 7 is arranged in a U-shape around the punch 93 on the mold base 91. The upper mold 8 includes an upper mold base 81, within which a cavity 82 is provided, corresponding to the position of the punch 93. An ejection mechanism 1 is also provided within the cavity of the punch 93. In the retracted state, the upper plane of the ejection mechanism 1 is not higher than the forming surface of the punch 93. A pressure material mechanism 2 is also provided within the cavity 82. In the retracted state, the lower surface of the pressure material mechanism 2 does not extend beyond the forming surface of the cavity 82.

[0031] During demolding, as the pressure ring 7 and the upper mold 8 are raised, the ejector mechanism 1 ejects simultaneously, cooperating with the pressure mechanism 2 to press the molded part firmly, so that the molded part is completely separated from the punch 93 and the die 82, thereby preventing the part from moving. As the upper mold 8 continues to rise, the pressure mechanism 2 completely disengages from the molded part, thus completely releasing the molded part.

[0032] like Figures 2-4 As shown, the ejection mechanism 1 includes a cylinder 12 and a mounting base 11. The cylinder 12 is fixed to the mounting base 11 by bolts. For ease of installation, the mounting base 11 is usually fixed to the lower part of the punch 93.

[0033] A push rod 13 is also installed at the extended end of the cylinder 11. A groove 17 is provided at the upper end of the push rod 13. A magnet is installed inside the groove 17. For metal parts, the magnet 16 plays a certain role in attracting the parts and further prevents the parts from moving.

[0034] The side wall of the ejector rod is provided with a guide groove 131, and the punch 93 is also provided with a limiting block 15 to prevent the ejector rod 13 from rotating.

[0035] Preventing the push rod from rotating when the cylinder 12 extends can further reduce the movement of the molded parts and improve the positional accuracy of the molded parts.

[0036] like Figure 5 As shown, the pressing mechanism 2 includes a spring support 21, a spring 24, and a pressing pin 23. The spring support 21 is fixed inside the die cavity and has a cavity. The spring 24 is disposed inside the cavity. A spring cover plate 22 is provided at the tail end of the spring support 21, which compresses the spring 24 inside the spring support 21. A through hole 211 is also provided at the front end of the cavity of the spring support 21. The pressing pin 23 extends and retracts through the through hole 211. A boss 231 is provided at the tail end of the pressing pin 23 to prevent the pressing pin 23 from popping out of the spring support 21.

[0037] When the upper die 8 is pressed down, the pressure pin 23 automatically retracts and holds the part, without affecting the stamping of the part. After the stamping is completed, the upper die 8 is lifted up, and the pressure pin 23 automatically pops out, pushing the formed part away from the upper die 8 to prevent the upper die 8 from adsorbing the formed part.

[0038] like Figure 1 As shown, the spring support 21 can be a cavity formed inside the die 82 to hold the spring 24, and a through hole 211 through which the pressure pin 23 passes is provided at the front end of the cavity.

[0039] To better prevent parts from shifting, the ejection mechanism 1 and the pressing mechanism 2 are set in multiple groups, usually two groups.

[0040] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A mechanism for preventing parts from shifting during demolding, comprising a lower mold (9), an upper mold (8), and a pressure ring (7); wherein the lower mold (9) comprises a mold base (91) and a punch (93), the punch (93) being located at the center of the upper plane of the mold base (91); the pressure ring (7) is arranged in a U-shape around the punch (93) on the mold base (91); the upper mold (8) comprises an upper mold base (81), within which a die (82) is provided, the die (82) being positioned corresponding to the punch (93); characterized in that: The cavity of the punch (93) is also provided with an ejector mechanism (1). When the ejector mechanism (1) is retracted, its upper surface is not higher than the forming surface of the punch (93). The cavity of the die (82) is also provided with a pressing mechanism (2). When the pressing mechanism (2) is retracted, its lower surface does not exceed the forming surface of the cavity (82).

2. The mechanism for preventing parts from shifting during demolding according to claim 1, characterized in that: The ejection mechanism (1) includes a cylinder (12) and a mounting base (11). The cylinder (12) is fixed to the mounting base (11) by bolts, and the mounting base (11) is fixed to the lower part of the punch (93).

3. The mechanism for preventing parts from shifting during demolding according to claim 2, characterized in that: A push rod (13) is provided at the extended end of the cylinder (12), and the upper plane of the push rod (13) does not extend beyond the forming surface of the punch (93).

4. The mechanism for preventing parts from shifting during demolding according to claim 3, characterized in that: The top rod (13) is also provided with a groove (17) on its upper surface, and a magnet (16) is provided in the groove (17).

5. The mechanism for preventing parts from shifting during demolding according to claim 3, characterized in that: The push rod (13) has a guide groove (131) on its side wall, and the punch (93) is also provided with a limiting block (15) to restrict the rotation of the push rod.

6. The mechanism for preventing parts from shifting during demolding according to claim 1, characterized in that: The pressing mechanism (2) includes a spring support (21), a spring (24) and a pressing pin (23). The spring (24) is located inside the spring support (21). The spring support (21) has a spring cover plate (22) at its tail and a through hole (212) at its front end. The pressing pin (23) extends and retracts along the through hole (212). The pressing pin (23) has a boss (231) at its tail to prevent the pressing pin (23) from popping out. In the retracted state, the lower surface of the pressing pin does not exceed the forming surface of the die (82).

7. The mechanism for preventing part movement during demolding according to claim 6, characterized in that: The spring support (21) is a cavity (211) formed inside the upper mold, and a through hole (212) is provided at the front end of the cavity (211).

8. A mechanism for preventing part movement during demolding according to any one of claims 1 or 6, characterized in that: The ejection mechanism (1) and the pressing mechanism (2) are provided in multiple sets corresponding to each other.

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