Needle-type flanging ejector

Abstract

This invention relates to a pin-type flanging ejector, comprising: a cylinder body disposed on a lower die assembly; a floating pin movably disposed within the cylinder body; a spring disposed between the floating pin and the bottom of the cylinder body; and a scraper block disposed on the side wall of the floating pin and on the bottom side. The scraper block extends through the cylinder body and outwards from the side away from the floating pin. In this invention, the scraper block can be unlocked as the lower die assembly moves downwards. When the upper die assembly moves upwards and separates from the lower die assembly, the scraper block lifts the workpiece and detaches it from the lower die assembly during free floating. The power source in this application is the same as that of the upper die assembly and changes with the up-and-down movement of the upper die assembly. Therefore, it is not necessary to add an additional drive source to the ejector, thus effectively ensuring that the action of the ejector and the rhythm of the stamping flanging process are consistent, preventing interference with the die, and improving the stability and accuracy of workpiece ejection.

Description

Technical Field

[0001] This invention relates to the field of flanging die technology, and more particularly to a needle-type flanging ejector. Background Technology

[0002] The shapes of some stamped parts of the car body are becoming increasingly complex. Since some parts have local flanging features, it is necessary to add flanging ejection devices.

[0003] The existing ejection device is located inside the lower die assembly and is a separate drive source. Therefore, it cannot be guaranteed that the action of the ejection device is consistent with that of the upper die assembly and the timing of the stamping and flanging process, and it is prone to interference with the flanging die. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a needle-type flange ejector, the specific technical solution of which is as follows:

[0005] A pin-type flange ejector includes: a cylinder body disposed on a lower die assembly; a floating pin movably disposed within the cylinder body; a spring disposed between the floating pin and the bottom of the cylinder body; a scraper block disposed on the side wall of the floating pin and on the bottom side; the scraper block extending through the cylinder body and out of the cylinder body on the side away from the floating pin; and a limiting member disposed inside the floating pin, the limiting member engaging with the side wall of the cylinder body.

[0006] The drive assembly includes an outer sleeve disposed below the upper mold assembly, a connecting rod movably inserted into the bottom of the outer sleeve, and a pusher disposed on the side wall of the cylinder. An adjusting member is slidably connected above the pusher, and a conical head is disposed below the connecting rod. The outer sleeve moves down along the surface of the connecting rod until it abuts against the conical head, driving the adjusting member to reciprocate along the extension direction of the pusher.

[0007] When the upper die assembly moves downward, the downward movement of the upper die assembly and the drive component includes a first stage of idle movement and a second stage of pushing. In the first stage of idle movement, the lower die assembly drives the outer sleeve to move downward along the surface of the connecting rod until the outer sleeve contacts the conical head. In the pushing stage, the outer sleeve pushes the conical head downward, causing the conical head to drive the adjusting component to move closer to the cylinder. The adjusting component drives the telescopic end of the pushing component to press against the limiting component. At the same time, since the upper die assembly is in contact with the top of the cylinder, the telescopic end of the adjusting component pushes the limiting component into the cylinder, so that the floating pin is in the unlocked state. Since the upper die assembly is in contact with the top of the cylinder, at this time, the upper die assembly will press against the floating pin, effectively preventing the floating pin from moving upward. After the workpiece is finished flanging, the upper die assembly moves upward. At this time, under the restoring force of the first spring, the first spring pushes the floating pin upward. The floating pin drives the scraper block upward, causing the scraper block to move the workpiece out of the lower die assembly, thereby completing the ejection of the workpiece.

[0008] As an improvement to the above technical solution, the limiting member includes an installation groove opened in the floating pin, a positioning block is movably inserted into the end of the installation groove and the end away from the scraper block, and a spring is provided between the positioning block and the installation groove.

[0009] As an improvement to the above technical solution, the pushing member includes a fixed frame arranged perpendicular to the cylinder body, the center line of the fixed frame in the horizontal direction coincides with the center line of the limiting member in the horizontal direction, the side wall of the cylinder body is provided with a limiting hole adapted to the limiting member, and a pushing rod is movably arranged in the fixed frame, the end of the pushing rod away from the cylinder body extends to the outside of the fixed frame and is fixedly connected to the adjusting member.

[0010] As an improvement to the above technical solution, the adjusting component includes a driving block slidably connected to the top of the fixed frame, a second spring is provided between the driving block and the cylinder, an inclined surface is provided on the side of the driving block away from the second spring, and a limiting groove adapted to the conical head is provided on the inclined surface.

[0011] As an improvement to the above technical solution, the sliding friction between the outer sleeve and the connecting rod is less than the sliding friction between the conical head and the driving block.

[0012] As an improvement to the above technical solution, the cylinder surface is provided with a sliding groove for the scraper block to move.

[0013] The beneficial effects of this invention are:

[0014] During the downward movement of the lower die assembly, the scraper block can be unlocked, changing from a locked state to an unlocked state. When the upper die assembly moves upward and separates from the lower die assembly, the freely floating scraper block can lift the workpiece and detach it from the lower die assembly. The power source in this application is the same as that of the upper die assembly and changes with the up and down movement of the upper die assembly. Therefore, it is not necessary to add an additional drive source for this ejector, which can effectively ensure that the action of the ejector and the rhythm of the stamping and flanging process are consistent, and there will be no problem of mutual interference with the mold, thus improving the stability and accuracy of workpiece ejection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the floating pin compression state of the present invention;

[0016] Figure 2 This is a schematic diagram showing the contact state between the outer sleeve and the cylindrical head in this invention;

[0017] Figure 3 This is a schematic diagram of the movement state of the driving block in this invention;

[0018] Figure 4 This is a schematic diagram of the initial state structure in this invention;

[0019] Figure 5 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0020] Reference numerals: 10. Cylinder body; 11. Spring 1; 12. Scraper block; 13. Floating pin; 14. Slide groove; 15. Limiting hole; 20. Outer sleeve; 21. Connecting rod; 22. Conical head; 23. Drive block; 24. Push rod; 25. Fixing frame; 26. Spring 2; 30. Positioning block; 31. Mounting groove; 32. Spring 3. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] A pin-type flange ejector includes: a cylinder 10, mounted on a lower die assembly, a floating pin 13 movably disposed within the cylinder 10, a spring 11 disposed between the floating pin 13 and the bottom of the cylinder 10, a scraper block 12 disposed on the side wall of the floating pin 13 and on the bottom side, the scraper block 12 extending through the cylinder 10 and outward from the side away from the floating pin 13, a limiting member disposed inside the floating pin 13, the limiting member engaging with the side wall of the cylinder 10; and a drive assembly, the drive assembly including an outer sleeve 20 disposed below the upper die assembly, a connecting rod 21 movably inserted into the bottom of the outer sleeve 20, and a pusher disposed on the side wall of the cylinder 10, an adjusting member slidably connected above the pusher, and a conical head 22 disposed below the connecting rod 21, the outer sleeve 20 moving downward along the surface of the connecting rod 21 until it abuts against the conical head 22, driving the adjusting member to reciprocate along the extension direction of the pusher.

[0023] refer to Figure 4 This is the initial state of the ejector. When a workpiece needs to be placed, pressing the floating pin 13 downwards moves it, causing the floating pin 13 to drive the scraper block 12 downwards, positioning it below the workpiece placement area. When it moves to be flush with the limiting hole 15, the restoring force of the spring 32 pushes the positioning block 30 of the limiting member into the limiting hole 15. The floating pin 13 is then fixed within the cylinder 10 by the limiting member. (Refer to...) Figure 1 Then, the workpiece is placed, and as the upper mold assembly moves downward, the downward movement of the upper mold assembly and the drive component includes a first stage of idle movement and a second stage of pushing. During the first stage of idle movement, refer to... Figure 2 The lower mold assembly drives the outer sleeve 20 to move downwards along the surface of the connecting rod 21 until the outer sleeve 20 contacts the conical head 22. During the pushing phase, refer to... Figure 3The outer sleeve 20 pushes the conical head 22 downward, causing the conical head 22 to move the adjusting component closer to the cylinder 10. The adjusting component causes the telescopic end of the pushing component to press against the limiting component. At the same time, since the upper die assembly is in contact with the top of the cylinder 10, the telescopic end of the adjusting component pushes the limiting component into the cylinder 10, so that the floating pin 13 is in the unlocked state. However, since the upper die assembly is in contact with the top of the cylinder 10, the upper die assembly will press against the floating pin 13, and the floating pin 13 will not move upward. After the workpiece is finished flanging, the upper die assembly moves upward. At this time, under the restoring force of the spring 11, the spring 11 pushes the floating pin 13 upward. The floating pin 13 causes the scraper block 12 to move upward, so that the scraper block 12 moves the workpiece out of the lower die assembly, thereby completing the ejection of the workpiece.

[0024] In one embodiment, reference Figure 5 The limiting component includes a mounting groove 31 opened in the floating pin 13. A positioning block 30 is movably inserted into the end of the mounting groove 31 away from the scraper block 12. A spring 32 is provided between the positioning block 30 and the mounting groove 31. When the spring 32 is in a free extension state, the positioning block 30 enters the limiting hole 15 opened in the side wall of the cylinder 10 under the action of the spring 32, thereby limiting and fixing the floating pin 13. When the pushing component squeezes the positioning block 30 and squeezes the positioning block 30 out of the limiting hole 15, the floating pin 13 moves upward under the action of the spring 11.

[0025] In one embodiment, reference Figure 1-4 The pushing component includes a fixed frame 25 arranged perpendicular to the cylinder body 10. The center line of the fixed frame 25 in the horizontal direction coincides with the center line of the limiting component in the horizontal direction. The side wall of the cylinder body 10 is provided with a limiting hole 15 adapted to the limiting component. A pushing rod 24 is movably arranged inside the fixed frame 25. The end of the pushing rod 24 away from the cylinder body 10 extends to the outside of the fixed frame 25 and is fixedly connected to the adjusting component. Specifically, when the adjusting component moves back and forth along the extension direction of the fixed frame 25, the adjusting component drives the pushing rod 24 to move closer to or away from the cylinder body 10. When the pushing rod 24 approaches the cylinder body 10, the pushing rod will enter the limiting hole 15 and can be extruded into the positioning block 30 of the limiting hole 15.

[0026] To prevent the adjusting member from disengaging from the conical head 22, the adjusting member includes a drive block 23 slidably connected to the top of the fixed frame 25, see reference. Figure 4A second spring 26 is provided between the drive block 23 and the cylinder 10. An inclined surface is provided on the side of the drive block 23 away from the second spring 26. A limiting groove adapted to the conical head 22 is provided on the inclined surface. When the outer sleeve 20 pushes the conical head 22 downward, the drive block 23 is pushed to move through the inclined surface, squeezing the second spring 26. At the same time, the bottom of the drive block 23 is connected to the push rod 24, and the drive block 23 will drive the push rod 24 to move. When the upper mold assembly moves upward, the conical head 22 can be effectively prevented from disengaging from the drive block 23 due to the upward movement of the outer sleeve 20 and the limiting groove.

[0027] To ensure that the floating pin 13 does not pop out during the downward movement of the upper mold assembly, the sliding friction between the outer sleeve 20 and the connecting rod 21 is less than the sliding friction between the conical head 22 and the driving block 23. This ensures that during the downward movement of the upper mold assembly, the outer sleeve 20 can first move along the connecting rod 21 and then push the driving block 23 to move.

[0028] In one embodiment, the cylinder body 10 has a groove 14 on its surface for the scraper block 12 to move up and down. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A needle-type flanging ejector, characterized in that, include: A cylinder (10) is mounted on the lower mold assembly. A floating pin (13) is movably mounted inside the cylinder (10). A spring (11) is mounted between the floating pin (13) and the bottom of the cylinder (10). A scraper block (12) is mounted on the side wall of the floating pin (13) and on the bottom side. The scraper block (12) extends through the cylinder (10) and out of the cylinder (10) on the side away from the floating pin (13). A limiting member is mounted inside the floating pin (13). The limiting member is engaged with the side wall of the cylinder (10). The drive assembly includes an outer sleeve (20) disposed below the upper mold assembly, a connecting rod (21) movably inserted into the bottom of the outer sleeve (20), and a pusher disposed on the side wall of the cylinder (10). An adjusting member is slidably connected above the pusher, and a conical head (22) is disposed below the connecting rod (21). The outer sleeve (20) moves down along the surface of the connecting rod (21) until it abuts against the conical head (22), driving the adjusting member to reciprocate along the extension direction of the pusher. The limiting component includes a mounting groove (31) opened in the floating pin (13), and a positioning block (30) is movably inserted into the end of the mounting groove (31) and the end away from the scraper block (12). A spring (32) is provided between the positioning block (30) and the mounting groove (31). The pusher includes a fixed frame (25) arranged vertically to the cylinder (10), the center line of the fixed frame (25) in the horizontal direction coincides with the center line of the limiting member in the horizontal direction, the side wall of the cylinder (10) is provided with a limiting hole (15) adapted to the limiting member, and a push rod (24) is movably arranged in the fixed frame (25), the end of the push rod (24) away from the cylinder (10) extends to the outside of the fixed frame (25) and is fixedly connected to the adjusting member; The adjusting component includes a driving block (23) slidably connected to the top of the fixed frame (25). A second spring (26) is provided between the driving block (23) and the cylinder (10). An inclined surface is provided on the side of the driving block (23) away from the second spring (26). A limiting groove adapted to the conical head (22) is provided on the inclined surface.

2. The needle flanger ejector of claim 1 wherein: The sliding friction between the outer sleeve (20) and the connecting rod (21) is less than the sliding friction between the conical head (22) and the driving block (23).

3. The needle-flanging ejector of claim 2, wherein: The cylinder body (10) has a groove (14) on its surface for the scraper block (12) to move.

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