Pre-edge wrapping mechanism

Abstract

The present invention provides a pre-edge wrapping mechanism comprising: an inner mold positioning mechanism, the inner mold positioning mechanism being disposed in the middle of the pre-edge wrapping mechanism; a locking mechanism disposed on one side of the inner mold positioning mechanism, cooperating with an inner mold block on the inner mold positioning mechanism for locking; and an outer mold pushing mechanism, the outer mold pushing mechanism being disposed on the outer side of the locking mechanism, the outer mold pushing mechanism being coupled to the inner mold block through the outer mold block, and performing edge wrapping under the action of a cylinder. The present invention utilizes a cylinder drive structure to achieve functions such as positioning, clamping, and pre-edge wrapping. This allows for pre-edge wrapping of automotive sheet metal parts even when the flanging angle of the parts is excessively large. The structure is simple, practical, and rapid.

Description

Technical Field

[0001] The embodiments of the present invention relate to a hemming mechanism, and in particular to a pre-hemming mechanism. Background Art

[0002] During production, the flange angles of some automotive sheet metal parts are too large, making it difficult for robotic hemming tools to complete the process with guaranteed quality. A pre-hemming mechanism is used to pre-bend the large-angle flange to a suitable angle for robotic hemming before the robot hems it. This mechanism can be implemented as a standalone workstation fixture or integrated into a specific fixture or jig. This flexibility is achieved by creating a standalone pre-hemming workstation or by integrating this module into the loading station. Therefore, the pre-hemming mechanism must be simple and efficient. Summary of the Invention

[0003] The purpose of the present invention is to provide a pre-edging mechanism that adopts a cylinder drive structure to realize functions such as positioning, clamping, and pre-edging. It can realize pre-edging of automobile sheet metal parts when the flanging angle of the sheet metal parts is too large. Its structure is simple, practical and fast.

[0004] In order to achieve the above-mentioned purpose, an embodiment of the present invention designs a pre-edge binding mechanism, which is characterized by comprising:

[0005] An inner mold positioning mechanism, the inner mold positioning mechanism is arranged in the middle of the pre-edge wrapping mechanism;

[0006] The locking mechanism is provided on one side of the inner mold positioning mechanism and cooperates with the inner mold block on the inner mold positioning mechanism to perform locking;

[0007] The outer mold pushing mechanism is arranged on the outside of the locking mechanism; the outer mold pushing mechanism is passed through the outer mold block and the inner mold block; and performs hemming under the action of the cylinder.

[0008] Wherein, the inner mold positioning mechanism further includes:

[0009] A connecting rod is provided on one side of the outer mold block; a side surface of the connecting rod is arranged opposite to a side of the outer mold block; one end of the connecting rod is movably connected to one end of an extension rod of the cylinder via a movable joint; the middle position of the connecting rod is fixed by one end of a connecting frame, and is movably connected to a slider on the outer mold pushing mechanism via the connecting frame; the inner mold block is provided on one side of the connecting rod;

[0010] The first cylinder is arranged on one side of the inner mold positioning mechanism; the piston rod of the first cylinder is connected to the other end of the extension rod; the first cylinder drives the connecting rod to slide.

[0011] Wherein, the locking mechanism further comprises:

[0012] The second cylinder is arranged on one side fixed to the locking mechanism, and a clamping head is connected to the cylinder rod of the second cylinder, and a cam pressure block is arranged at the front end of the clamping head; the cam pressure block is arranged inside the clamping head and is movably connected to the clamping head; a stop block is arranged in front of the clamping head; and a stop plate is arranged between the stop block and the clamping head.

[0013] Wherein, the outer mold pushing mechanism also includes:

[0014] A third cylinder is disposed below the outer mold pushing mechanism, is in an upright position, and is fixed below the outer mold pushing mechanism; a limit nut is provided on a piston rod at one end of the third cylinder; and one end of one of the connecting rods of the three-link mechanism is movably connected to the piston rod at the other end of the third cylinder;

[0015] The slider is connected to one end of one of the connecting rods of the three-link mechanism; the slider is arranged above the outer mold pushing mechanism; the slider has a forward and backward sliding structure, and a contoured hole is arranged at one end of the slider; the contoured hole cooperates with the supporting block arranged below the contoured hole to form a mold cavity.

[0016] Wherein, the three-link mechanism further includes:

[0017] a first connecting rod, one end of which is movably connected to the fixed support of the outer mold pushing mechanism;

[0018] a second connecting rod, the second connecting rod being movably connected to the slider;

[0019] a third connecting rod, the third connecting rod being movably connected to one end of a piston rod on a third cylinder;

[0020] The other end of the first connecting rod, the other end of the second connecting rod and the other end of the third connecting rod are movably connected by pins.

[0021] Wherein, a support base is provided at the bottom of the pre-edging mechanism to fix the inner mold positioning mechanism, the locking mechanism, and the outer mold pushing mechanism respectively.

[0022] Wherein, sliding grooves are provided on both sides of the sliding block on the outer mold pushing mechanism.

[0023] Wherein, a stop block is provided on the rear side of the sliding block.

[0024] Wherein, a support base is also provided below the support block.

[0025] The cam pressing block is semicircular in shape, one side of the cam pressing block is movably connected to the piston rod of the second cylinder; the other side of the cam pressing block is movably connected to the outer frame of the locking mechanism.

[0026] Compared with the prior art, the embodiments of the present invention can quickly achieve pre-edging. The device has a simple structure and flexible application, which solves the problem that the hemming tool cannot hem large-angle parts. At the same time, the device in the present invention is flexible in application and can be integrated into a fixture or jig as a functional module, or it can be independently made into a pre-edging workbench. In addition, the power source only uses a cylinder, without electric drive, which is energy-saving and environmentally friendly. The three-link force amplification mechanism in the present invention has a novel design, is simple to manufacture, and outputs large thrust with low power consumption; the locking function adopts a cam mechanism, which has a simple structure and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 Schematic diagram of the inner mold positioning mechanism of the present invention;

[0029] Figure 3 is a schematic diagram of the locking mechanism of the present invention;

[0030] Figure 4 This is a schematic diagram of the outer mold pushing machine of the present invention in a fully cutaway state; DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be implemented.

[0032] The first embodiment of the present invention relates to a pre-edge mechanism, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, including:

[0033] The inner mold positioning mechanism 10 is arranged in the middle of the entire pre-edge wrapping mechanism; such a layout is conducive to reducing the physical space occupied by the entire device.

[0034] The locking mechanism 20 is provided on one side of the inner mold positioning mechanism 10 and cooperates with the inner mold block 11 on the inner mold positioning mechanism 10 to perform locking;

[0035] The outer mold pushing mechanism 30 is arranged outside the locking mechanism 20; the outer mold pushing mechanism 30 passes through the outer mold block 31 and the inner mold block 11; and performs hemming under the action of the cylinder.

[0036] The above structure in this embodiment has a simple structure and can quickly realize pre-edging. The device has a simple structure and is flexible in application, which solves the problem that the hemming tool cannot hem large-angle parts. At the same time, the device in the present invention is flexible in application and can be integrated into a fixture or jig as a functional module, or it can be made into a pre-edging workbench separately.

[0037] In order to further better reflect the specific structure of this embodiment, in this embodiment, combined with the attached Figure 2 As shown, the inner mold positioning mechanism 10 also includes:

[0038] Connecting rod 12, connecting rod 12 is arranged on one side of outer mold block 31; the side surface of connecting rod 12 is arranged opposite to one side of outer mold block 31; one end of connecting rod 12 is movably connected to one end of extension rod 15 of cylinder through movable joint 14; the middle position of connecting rod 112 is fixed by one end of connecting frame 16, and is movably connected with slider 32 on outer mold pushing mechanism 30 through connecting frame 16; inner mold block 11 is arranged on one side of connecting rod 12; the above-mentioned inner mold positioning mechanism 10 utilizes inner mold block 11 to perform positioning during hemming process, so as to achieve the accuracy of pre-edging; it can realize the compression and shaping between inner mold block 11 and connecting rod 12, and finally realize the positioning of product.

[0039] The first cylinder 13 is located on one side of the inner mold positioning mechanism 10. Its piston rod is connected to the other end of the extension rod 15. The first cylinder 13 drives the connecting rod 12 to slide. This mechanism not only achieves compression and shaping between the inner mold block 11 and the connecting rod 12, but also allows for loading and unloading of products.

[0040] In this embodiment, combined with the Figure 3 As shown, the locking mechanism 20 further includes:

[0041] The second cylinder 21 is fixed to one side of the locking mechanism 20. A pressing head 22 is connected to the cylinder rod of the second cylinder 21, and a cam block 23 is provided at the front end of the pressing head 22. The cam block 23 is disposed inside the pressing head 22 and is movably connected to the pressing head 22. A stopper 24 is provided in front of the pressing head 22, and a stopper 25 is provided between the stopper 24 and the pressing head 22. To better achieve the pressing process during the pre-edge wrapping process, the cam block 23 is semicircular in shape. One side of the cam block 23 is movably connected to the piston rod of the second cylinder 21; the other side of the cam block 23 is movably connected to the outer frame 26 of the locking mechanism 20. The above structure can achieve the tightening of the product through the cam block 23 under the second cylinder 21. The locking mechanism 20 utilizes the cam principle. The piston rod of the second cylinder 21 is connected to the cam mechanism. When the second cylinder 21 is pushed out, the contact surface of the cam block 23 passes the dead point position and presses on the connecting rod 12 of the inner mold positioning mechanism 10. When the inner mold positioning mechanism 10 is subjected to external force, due to the radius difference of the cam block 23, the connecting rod 12 will only be pressed tighter and tighter, and the product will be firmly locked.

[0042] In this embodiment, combined with the Figure 4 As shown, the outer mold pushing mechanism 30 also includes:

[0043] The third cylinder 33 is disposed below the outer mold pushing mechanism 30. The third cylinder 33 is in an upright position and is fixed below the outer mold pushing mechanism 30. A limit nut 34 is provided on the piston rod at one end of the third cylinder 33. The piston rod at the other end of the third cylinder 33 is movably connected to one end of one of the connecting rods of the three-link mechanism.

[0044] The slider 32 is connected to one end of one of the links of the three-bar linkage. The slider 32 is positioned above the outer mold pushing mechanism 30. The slider 32 slides back and forth, with a contoured hole 36 at one end. The contoured hole 36 cooperates with a support block 35 positioned below the contoured hole 36 to form a mold cavity. This allows the third cylinder 33 of the outer mold pushing mechanism 30 to drive the slider 32 through the three-bar linkage, creating a mold cavity with the contoured hole 36 and the support block 35 positioned below the contoured hole 36, to pre-edge the product. The above structure is simple, and in this embodiment, the force-amplifying mechanism of the three-bar linkage is employed, achieving a small input force with a large output force. The third cylinder 33 is a double-rod cylinder, positioned upright, with a limit nut 34 installed at its lower end and connected to the three-bar linkage at its upper end. The three-bar linkage has one fixed and rotating rod, one rod connected to the cylinder, and one rod connected to the slider. The outer mold block 31 is mounted on the slider 32. The third cylinder 33 extends upward, and through the linkage mechanism, the slider moves rightward, pushing the plate flange to bend and deform until it contacts the inner mold block 11. The three-link mechanism is arranged in a triangular shape. As the third cylinder 33 extends during operation, the angle of the triangle gradually decreases, the lever arm increases, and the thrust generated gradually increases. When two of the links are collinear, the output force reaches its maximum.

[0045] In this embodiment, to further illustrate the three-bar linkage, the three-bar linkage further includes:

[0046] A first connecting rod 37, one end of which is movably connected to the fixed support 40 of the outer mold pushing mechanism 30;

[0047] A second connecting rod 38 movably connected to the slider 32 ;

[0048] A third connecting rod 39 movably connected to one end of a piston rod on the third cylinder 33;

[0049] The other end of the first connecting rod 37, the other end of the second connecting rod 38 and the other end of the third connecting rod 39 are movably connected by pins. The above is a three-link mechanism, which has a simple structure and a large output force.

[0050] In this embodiment, combined with the Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 As shown, a support base 50 is provided at the bottom of the pre-edging mechanism in this embodiment, which fixes the inner mold positioning mechanism 10, the locking mechanism 20, and the outer mold pushing mechanism 30 respectively, and serves as a fixing function for the pre-edging mechanism in this embodiment.

[0051] Combined with attachment Figure 4Slide grooves 41 are set on both sides of the slider 32 on the outer mold pushing mechanism 30. The slide grooves 41 serve to guide the slider 32. In order to limit the stroke of the slider 32, a stop block 42 is set on the rear side of the slider 32; a support base 50 is also set below the support block 35, which mainly serves to fix the support block 35. The above structure is to better utilize the slider 32 on the outer mold pushing mechanism 30 in this embodiment for pre-edging.

[0052] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A pre-edge mechanism, characterized in that: include: An inner mold positioning mechanism, the inner mold positioning mechanism is arranged in the middle of the pre-edge wrapping mechanism; The locking mechanism is provided on one side of the inner mold positioning mechanism and cooperates with the inner mold block on the inner mold positioning mechanism to perform locking; An outer mold pushing mechanism is provided on the outside of the locking mechanism; the outer mold pushing mechanism is connected to the outer mold block and the inner mold block; and the outer mold pushing mechanism is used to perform hemming under the action of the cylinder; The outer mold pushing mechanism further includes: a third cylinder, disposed below the outer mold pushing mechanism, the third cylinder being in an upright position and fixed below the outer mold pushing mechanism; a limit nut being provided on a piston rod at one end of the third cylinder; and one end of one of the connecting rods of the three-link mechanism being movably connected to the piston rod at the other end of the third cylinder; The slider is connected to one end of one of the connecting rods of the three-link mechanism; the slider is arranged above the outer mold pushing mechanism; the slider has a forward and backward sliding structure, and a contoured hole is provided at one end of the slider; the contoured hole cooperates with a supporting block provided below the contoured hole to form a mold cavity; The inner mold positioning mechanism further includes: a connecting rod, the connecting rod being arranged on one side of the outer mold block; a side surface of the connecting rod being arranged opposite to one side of the outer mold block; one end of the connecting rod being movably connected to one end of an extension rod of the cylinder via a movable joint; a middle position of the connecting rod being fixed by one end of a connecting frame, and being movably connected to a slider on the outer mold pushing mechanism via the connecting frame; and the inner mold block being arranged on one side of the connecting rod; A first cylinder is provided on one side of the inner mold positioning mechanism; a piston rod of the first cylinder and the other end of the extension rod; The first cylinder drives the connecting rod to slide; The locking mechanism further comprises: a second cylinder, which is arranged on one side fixed to the locking mechanism; a pressing head is connected to the piston rod of the second cylinder; a cam pressing block is provided at the front end of the pressing head; the cam pressing block is provided inside the pressing head and is movably connected to the pressing head; a stopper is provided in front of the pressing head; and a stopper is provided between the stopper and the pressing head; The cam pressing block is semicircular, and one side of the cam pressing block is movably connected to the piston rod of the second cylinder; the other side of the cam pressing block is movably connected to the outer frame of the locking mechanism; The three-link mechanism further includes: a first link, one end of which is movably connected to the fixed support of the outer mold pushing mechanism; a second connecting rod, the second connecting rod being movably connected to the slider; a third connecting rod, the third connecting rod being movably connected to one end of a piston rod on a third cylinder; The other end of the first connecting rod, the other end of the second connecting rod and the other end of the third connecting rod are movably connected by pins.

2. The pre-edge binding mechanism according to any one of claim 1, characterized in that: A supporting base is provided at the bottom of the pre-edge binding mechanism, which respectively fixes the inner mold positioning mechanism, the locking mechanism, and the outer mold pushing mechanism.

3. The pre-edge binding mechanism according to claim 2, characterized in that: Slide grooves are arranged on both sides of the sliding block on the outer mold pushing mechanism.

4. The pre-edge binding mechanism according to claim 3, characterized in that: A stop block is provided on the rear side of the sliding block.

5. The pre-edge binding mechanism according to claim 1, characterized in that: A support base is also provided below the support block.

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