Automobile door panel cutting device

Abstract

The utility model relates to the field of automobile door panel processing, concretely is a kind of automobile door panel cutting device, including the cutting mechanism for cutting to automobile door panel cooperation, back pressure fixing mechanism and the buffer mechanism for providing buffer to cutting mechanism in the cutting process and eliminating stress concentration and oscillation further by misplacement, the cutting mechanism is installed on mounting mechanism, the mounting mechanism is slidably connected on the limiting post of punching mechanism, the back pressure fixing mechanism is installed at the rear end of the cutting mechanism, the buffer mechanism is arranged between the back pressure fixing mechanism and the cutting mechanism.Punching mechanism drives cutting mechanism to press down, fixed plate first presses tightly metal plate tail, reverse lifting drive three groups of buffer mechanism torsion, three groups of torsion misplacement block gap is different, corresponding bevel blade realizes progressive and has the shearing mode of buffer effect, to avoid burr;When resistance is too large, limit buffer assembly provides axial displacement, makes lifting seat and tool holder rigid cooperation to ensure cutting.

Description

Technical Field

[0001] This utility model relates to the field of automobile door panel processing, and in particular to an automobile door panel cutting device. Background Technology

[0002] Automotive door panels are an important component of the car body, typically made from sheet metal through stamping and cutting processes. The cutting quality directly affects the accuracy of subsequent welding and assembly, as well as the appearance quality of the finished product. Currently, sheet metal cutting is usually accomplished using hydraulically or pneumatically driven shearing machines with an upper blade holder and lower pressure mechanism.

[0003] In the prior art, compared with the Chinese utility model with announcement number CN205766292U, a cutting machine with a pressure plate buffer device is disclosed. The cutting machine uses a straight rack and pinion of the cutter holder to cooperate with the gear of the support frame and the rotating shaft. A torsion spring or a speed reduction block is set on the rotating shaft seat. The meshing transmission resistance slows down the descent speed of the cutter holder and reduces the impact force of the cutting blade on the board.

[0004] However, the above-mentioned existing technology still has the following technical problems when actually processing metal sheets such as automotive door panels: the blade is a straight blade structure with a flat horizontal surface. When pressing down to cut, the entire blade cuts into the metal sheet at the same time. The shearing force is released instantaneously along the blade length, causing local stress concentration. The metal sheet is pulled apart rather than sheared, which easily produces burrs, white edges and uneven cross-sections. Utility Model Content

[0005] The purpose of this invention is to provide an automotive door panel cutting device to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions: An automotive door panel cutting device includes a punching mechanism that provides cutting power, a cutting mechanism for cutting the automotive door panel, a back pressure fixing mechanism, and a buffering mechanism for providing buffering and misalignment to the cutting mechanism during the cutting process, thereby eliminating stress concentration and vibration. The cutting mechanism is mounted on a mounting mechanism, which is slidably connected to a limiting post of the punching mechanism. The back pressure fixing mechanism is mounted at the rear end of the cutting mechanism, and the buffering mechanism is disposed between the back pressure fixing mechanism and the cutting mechanism. The back pressure fixing mechanism includes a fixing plate, a sliding column is installed at the rear of the fixing plate, a reset sliding sleeve is slidably connected to the top of the sliding column, the reset sliding sleeve is welded to the rear end face of the lifting seat of the mounting mechanism, the bottom of the lifting seat is slidably fitted with the blade holder of the cutting mechanism, and the buffer mechanism is disposed between the lifting seat and the blade holder.

[0007] Preferably, the lower end of the blade holder is connected to a blade by bolts, and a T-shaped mounting seat is provided at the base position of the blade corresponding to the bottom of the punching mechanism. The front end of the T-shaped mounting seat is provided with a bottom mating blade holder corresponding to the blade, and the top position of the T-shaped mounting seat corresponds to the fixing plate.

[0008] Preferably, the buffer mechanism includes a torsional power assembly, the fixed part of which is welded to the top of the fixed plate, a limit buffer assembly is connected through the inner side of the torsional power assembly, a torsional misalignment block is provided at the front end of the limit buffer assembly, and the buffer mechanism is provided with three sets.

[0009] Preferably, the torsion misalignment block is an elliptical conical block, the tool holder is formed with a groove that cooperates with the rotation and compression of the torsion misalignment block, the blade is a beveled cutting edge, and the taper of the three torsion misalignment blocks corresponding to the blade gradually decreases.

[0010] Preferably, the torsional power assembly includes a rack seat and a mating gear. The rack seat has a frame structure and a tooth block is formed on one side of its inner side. The mating gear meshes with the inner side of the rack seat. Anti-disengagement blocks are formed on the front and rear ends of the tooth block of the rack seat.

[0011] Preferably, the limit buffer assembly includes a limiting ring, a support spring, and a splined shaft. The splined shaft slides and is connected to the mating gear through a spline engagement. The limiting ring is installed on the end face of the splined shaft away from the torsion misalignment block. The support spring is provided between the limiting ring and the mating gear.

[0012] Preferably, the punching mechanism further includes a top frame, which is installed on the top of the limiting column. The punching power component is installed on the upper end of the top frame. There are two punching power components, and the movable end of the punching power component passes through the top frame and connects to the lifting seat.

[0013] Compared with existing technologies, the beneficial effects are as follows: The back pressure fixing mechanism and the cutting mechanism cooperate through a buffer mechanism. During the rapid downward pressing and cutting process driven by the punching mechanism, the three sets of buffer mechanisms first use a fixing plate to press against the tail of the metal plate for auxiliary fixation. The reverse lifting provides torsional power to the buffer mechanism between the lifting seat and the blade holder. When the blade is subjected to the resistance of the metal plate during cutting, the stress concentration results in a rapid and flexible downward cutting force, which gradually extends to the two subsequent buffer mechanisms. The gaps of the three buffer mechanisms after twisting are different, corresponding to the beveled blade, which makes the blade tend to be straight after cutting, improving the smoothness of the cut and avoiding burrs. If the stress concentration and resistance of the bottom metal plate increases during the twisting process of the torsion misalignment block, and it is pressed to the limit position by the lifting seat and the blade holder, the limit buffer component at the rear end can provide axial misalignment, so that the lifting seat and the blade holder are rigidly matched, avoiding the situation where the flexible force cannot cut quickly. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an isometric view of the feeding direction of the automotive door panel cutting device described in this utility model; Figure 2 This is an isometric view of the discharge direction of the automobile door panel cutting device described in this utility model; Figure 3 This is a schematic diagram of the back pressure fixing mechanism of the automobile door panel cutting device described in this utility model; Figure 4 This is a side view of the cutting mechanism of the automobile door panel cutting device described in this utility model; Figure 5 This utility model describes an automotive door panel cutting device. Figure 1 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the torsion misalignment block structure of the automobile door panel cutting device described in this utility model; Figure 7 This is a schematic diagram of the torsion power component structure of the automobile door panel cutting device described in this utility model.

[0016] The annotations in the attached figures are explained as follows: 1. Punching mechanism; 2. Mounting mechanism; 3. Back pressure fixing mechanism; 4. Buffer mechanism; 5. Cutting mechanism; 11. Top frame; 12. Limiting post; 13. Base; 14. Punching power component; 21. Lifting seat; 22. Limiting seat; 31. Fixing plate; 32. Sliding column; 33. Reset sliding sleeve; 41. Torsional power assembly; 42. Limit buffer assembly; 43. Torsional misalignment block; 51. Tool holder; 52. Bottom mating tool holder; 53. T-type mounting seat; 54. Blade; 55. Insert block; 411. Rack seat; 412. Mating gear; 421. Limiting ring; 422. Support spring; 423. Splined shaft. Detailed Implementation

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-7 As shown, an automobile door panel cutting device includes a punching mechanism 1 that provides cutting power, a cutting mechanism 5 for cutting the automobile door panel, a back pressure fixing mechanism 3, and a buffering mechanism 4 for providing buffering and misalignment to the cutting mechanism 5 during the cutting process, thereby eliminating stress concentration and vibration. The cutting mechanism 5 is mounted on a mounting mechanism 2, and the mounting mechanism 2 is slidably connected to the limiting post 12 of the punching mechanism 1. The back pressure fixing mechanism 3 is mounted on the rear end of the cutting mechanism 5, and the buffering mechanism 4 is disposed between the back pressure fixing mechanism 3 and the cutting mechanism 5. The back pressure fixing mechanism 3 includes a fixing plate 31, a sliding column 32 is installed at the rear of the fixing plate 31, a reset sliding sleeve 33 is slidably connected to the top of the sliding column 32, the reset sliding sleeve 33 is welded to the rear end face of the lifting seat 21 of the mounting mechanism 2, the bottom of the lifting seat 21 is slidably fitted with the knife holder 51 of the cutting mechanism 5, and the buffer mechanism 4 is set between the lifting seat 21 and the knife holder 51.

[0019] In this embodiment, the lower end of the blade holder 51 is connected to the blade 54 by bolts. The blade 54 is provided with a T-shaped mounting seat 53 at the position of the base 13 of the bottom punching mechanism 1. The front end of the T-shaped mounting seat 53 is provided with a bottom mating blade holder 52 corresponding to the blade 54. The top position of the T-shaped mounting seat 53 corresponds to the fixing plate 31.

[0020] With this configuration, the T-shaped mounting base 53 and the fixing plate 31 work together to provide a fixing effect when cutting the metal plate, and also to provide upward force for the fixing plate 31.

[0021] In this embodiment, the buffer mechanism 4 includes a torsional power assembly 41. The fixed part of the torsional power assembly 41 is welded to the top of the fixed plate 31. The inner side of the torsional power assembly 41 is connected to a limit buffer assembly 42. The front end of the limit buffer assembly 42 is provided with a torsional misalignment block 43. The buffer mechanism 4 is provided with three sets.

[0022] With this configuration, the lifting of the fixed plate 31, in conjunction with the torsion power assembly 41 and the limit buffer assembly 42, drives the torsion misalignment block 43 to rotate, causing the torsion misalignment block 43 to squeeze the gap between the lifting seat 21 and the tool holder 51, thus forcing the tool holder 51 to receive partial misalignment buffering during rapid cutting.

[0023] In this embodiment, the torsion misalignment block 43 is an elliptical cone block, and the tool holder 51 is formed with a groove that cooperates with the rotation and compression of the torsion misalignment block 43. The blade 54 is a beveled cutting edge, and the taper of the three torsion misalignment blocks 43 corresponding to the blade 54 gradually decreases.

[0024] With this configuration, the elliptical torsional misalignment block 43 is used to ensure that the torsional misalignment block 43 is always in line contact with the lifting seat 21 and the tool holder 51. This ensures smoothness during the rotation misalignment process and avoids jamming. Furthermore, it can be used in conjunction with the limit buffer component 42 to generate axial movement misalignment.

[0025] In this embodiment, the torsional power assembly 41 includes a rack seat 411 and a mating gear 412. The rack seat 411 has a frame structure and a tooth block is formed on one side of its inner side. The mating gear 412 meshes with the inner side of the rack seat 411. Anti-disengagement blocks are formed on the front and rear ends of the tooth block of the rack seat 411.

[0026] In this embodiment, the limit buffer assembly 42 includes a limiting ring 421, a support spring 422, and a spline shaft 423. The spline shaft 423 slides and is connected to the mating gear 412 through a spline engagement. The limiting ring 421 is installed on the end face of the spline shaft 423 away from the torsion misalignment block 43. The support spring 422 is provided between the limiting ring 421 and the mating gear 412.

[0027] In this embodiment, the punching mechanism 1 also includes a top frame 11, which is installed on the top of the limiting post 12. The punching power component 14 is installed on the upper end of the top frame 11. There are two punching power components 14. The movable end of the punching power component 14 passes through the top frame 11 and connects to the lifting seat 21. The side of the lifting seat 21 is connected to the limiting seat 22 through the insert block 55 and bolts. The limiting seat 22 is slidably fitted on the limiting post 12.

[0028] Working principle: During the processing, the metal plate is fed by the external conveying equipment to the space between the blade 54 and the T-shaped mounting seat 53. At this time, the punching power component 14 is activated, and the lifting seat 21 is pressed down quickly by the power. During the pressing process, the fixing plate 31 first contacts the metal plate, and together with the T-shaped mounting seat 53 at the bottom, it fixes the metal plate, providing a fixing effect for the subsequent cutting process. As the lifting seat 21 continues to press down, the fixing plate 31, after encountering resistance at the bottom, rises due to the movable engagement of the top sliding column 32 and the return sliding sleeve 33. This rise drives the rack seat 411 fixed at the top to rise as well. The rack seat 411 engages with the inner gear 412, causing the spline shaft 423 and the torsion misalignment block 43 to rotate. The rotation of the three torsion misalignment blocks 43 of different sizes provides misalignment between the lifting seat 21 and the tool holder 51, allowing the blade 54 to rapidly descend and cut the metal. The plate provides a buffer for the blade 54 during this process, eliminating the stress at the moment of contact and the vibration caused by hard friction during the cutting process. In addition, if the rigid resistance is too large during the cutting process, the torsion misalignment block 43 will pull the spline shaft 423 to cause axial misalignment when subjected to greater compression, thereby avoiding rigid impact. The three torsion misalignment blocks 43 drive the tool holder 51 to cut downwards in a misaligned manner, thereby guiding the original inclined surface of the blade 54 mounted on the tool holder 51 to slowly tend to be straight until it is completely straight when cutting, ensuring the cutting effect.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A car door panel cutting device, comprising a punching mechanism (1) providing cutting power, characterized in that: It also includes a cutting mechanism (5) for cutting the car door panel, a back pressure fixing mechanism (3) and a buffering mechanism (4) for providing buffering and misalignment to the cutting mechanism (5) during the cutting process to eliminate stress concentration and vibration. The cutting mechanism (5) is mounted on the mounting mechanism (2), which is slidably connected to the limiting post (12) of the punching mechanism (1). The back pressure fixing mechanism (3) is mounted on the rear end of the cutting mechanism (5), and the buffering mechanism (4) is disposed between the back pressure fixing mechanism (3) and the cutting mechanism (5). The back pressure fixing mechanism (3) includes a fixing plate (31), a sliding column (32) is installed at the rear of the fixing plate (31), a reset sliding sleeve (33) is slidably connected to the top of the sliding column (32), the reset sliding sleeve (33) is welded to the rear end face of the lifting seat (21) of the mounting mechanism (2), the bottom of the lifting seat (21) is slidably fitted with the knife holder (51) of the cutting mechanism (5), and the buffer mechanism (4) is arranged between the lifting seat (21) and the knife holder (51).

2. The automobile door panel cutting device according to claim 1, characterized in that: The blade holder (51) is bolted to the lower end of the blade (54). The blade (54) is provided with a T-shaped mounting seat (53) at the position of the base (13) of the bottom punching mechanism (1). The front end of the T-shaped mounting seat (53) is provided with a bottom mating blade holder (52) corresponding to the blade (54). The top position of the T-shaped mounting seat (53) corresponds to the fixing plate (31).

3. The automobile door panel cutting device according to claim 2, characterized in that: The buffer mechanism (4) includes a torsional power assembly (41), the fixed part of which is welded to the top of the fixed plate (31), and a limit buffer assembly (42) is connected through the inner side of the torsional power assembly (41). A torsional misalignment block (43) is provided at the front end of the limit buffer assembly (42). The buffer mechanism (4) is provided with three sets.

4. The automobile door panel cutting device according to claim 3, characterized in that: The torsion misalignment block (43) is an elliptical cone block. The tool holder (51) is formed with a groove that rotates and is squeezed in conjunction with the torsion misalignment block (43). The blade (54) is a beveled cutting edge. The taper of the three torsion misalignment blocks (43) corresponding to the blade (54) gradually decreases.

5. The automobile door panel cutting device according to claim 4, characterized in that: The torsional power assembly (41) includes a rack seat (411) and a mating gear (412). The rack seat (411) is a frame structure and has a tooth block formed on one side of its inner side. The mating gear (412) meshes with the inner side of the rack seat (411). Anti-detachment blocks are formed on the front and rear ends of the tooth block of the rack seat (411).

6. The automobile door panel cutting device according to claim 5, characterized in that: The limit buffer assembly (42) includes a limiting ring (421), a support spring (422), and a splined shaft (423). The splined shaft (423) slides and is connected to the mating gear (412) through a spline engagement. The limiting ring (421) is installed on the end face of the splined shaft (423) away from the torsion misalignment block (43). The support spring (422) is provided between the limiting ring (421) and the mating gear (412).

7. The automobile door panel cutting device according to claim 1, characterized in that: The punching mechanism (1) also includes a top frame (11), which is installed on the top of the limiting post (12). The punching power component (14) is installed on the upper end of the top frame (11). There are two punching power components (14). The movable end of the punching power component (14) passes through the top frame (11) and connects to the lifting seat (21).

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