A precision automobile cover mold extension movement device and a working method thereof

Abstract

The application discloses a precision automobile covering part mold expansion movement device and a working method thereof. The precision automobile covering part mold expansion movement device comprises a rodless cylinder and an expansion slide rail which are parallel to each other and horizontally connected with a body of the automobile covering part mold. The side end surface of a rodless cylinder sliding block of the rodless cylinder is connected with a vibration-absorbing locking device locking claw, and the upper end surface is connected with an expansion profile support. The upper end surface of the expansion profile support is provided with an expansion automobile covering part mold insert, the lower end surface is in sliding fit with the expansion slide rail, and the vibration-absorbing locking device locking tongue is arranged in cooperation with the vibration-absorbing locking device locking claw. The automobile covering part mold is expanded by using a simple and low-cost device, the size and weight of the automobile covering part mold are greatly reduced, the cost investment caused by the large-scale pulley mechanism or the increased process due to the negative angle problem is reduced, and the quality influence caused by the process error is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive body panel mold technology, and in particular to a precision automotive body panel mold extension motion device and its working method. Background Technology

[0002] With the rapid development of the automotive industry and the increasing maturity of automotive body panel mold manufacturing technology, automobiles have become a basic means of transportation for everyone. The market competition in automobiles has gradually evolved into a competition of quality and cost. The cost reduction of automobile body manufacturing depends on the stamping rate and material utilization of automotive body panel molds, as well as the initial investment in automotive body panel mold costs.

[0003] During the manufacturing process of large core automotive body panels, due to factors such as negative angles, subsequent automotive body panel molds need to continuously adjust the stamping angle relative to the large core automotive body panels. This not only increases the number of automotive body panel mold processes, expands the size of automotive body panel molds, and increases the weight and material requirements of automotive body panel molds, resulting in cost waste, but also causes a decrease in the precision of large core automotive body panels due to process transmission errors, posing a challenge to the low cost and high precision of automobiles.

[0004] Meanwhile, automotive body panel molds are high-speed, heavy-duty equipment. If a negative angle mechanism is added to the automotive body panel mold to solve some of the above problems, it will inevitably increase the weight and size of the automotive body panel mold. Moreover, the movement and vibration of the negative angle mechanism can easily cause a decline in the quality of large core automotive body panels.

[0005] Therefore, how to develop a precision automotive body panel mold extension motion device, and how to overcome the technical problems of enlarged automotive body panel mold size and low mechanism stability caused by large and dense mechanisms under the premise of accurate positioning, has become an important expectation for reducing the size of automotive body panel molds, mitigating the negative angle of automotive body panel molds, and reducing automotive body panel mold processes to achieve automotive quality improvement and cost reduction. Summary of the Invention

[0006] To address the shortcomings in the aforementioned background technology, this invention proposes a precision automotive body panel mold extension motion device and its working method, which solves the technical problems of existing precision automotive body panel molds being unable to detach from large and dense mechanisms, resulting in size expansion and low mechanism stability.

[0007] The technical solution of this application is as follows:

[0008] A precision automotive body panel mold extension motion device includes a rodless cylinder and an extension slide rail that are parallel to each other and horizontally connected to the automotive body panel mold body. The rodless cylinder slider has a vibration-absorbing locking claw connected to its side end face and an extension profile bracket connected to its upper end face. The extension profile bracket has an extension automotive body panel mold insert on its upper end face and a sliding engagement with the extension slide rail on its lower end face. A vibration-absorbing locking tongue is provided in cooperation with the vibration-absorbing locking claw. When the rodless cylinder slider drives the vibration-absorbing locking claw to extend horizontally, the vibration-absorbing locking tongue causes the vibration-absorbing locking claw to decelerate uniformly.

[0009] Preferably, the locking tongue of the vibration-absorbing locking device is disposed on the vibration-absorbing locking device fixing frame, and the vibration-absorbing locking device fixing frame is connected to the extended slide rail.

[0010] Preferably, the rodless cylinder is connected to the automotive body panel mold body and the vibration damping locking bracket at both ends via rodless cylinder mounting blocks at both ends.

[0011] Preferably, there are two extended slide rails spaced apart, the rodless cylinder is located in the middle of the two extended slide rails, and the upper end face of the extended profile bracket is provided with an extended automotive body panel mold insert near the two extended slide rails.

[0012] Preferably, the two ends of the vibration-absorbing locking device fixing frame are respectively connected to two extended slide rails.

[0013] Preferably, the vibration-absorbing locking claw includes a vibration-absorbing locking base connected to the side end face of the rodless cylinder slider, the rodless cylinder slider is hinged with a movable locking claw of the vibration-absorbing locking device, and the gap between the side end face of the rodless cylinder slider and the movable locking claw of the vibration-absorbing locking device corresponds to the locking tongue of the vibration-absorbing locking device.

[0014] Preferably, the side of the movable locking claw of the vibration-absorbing lock facing the locking tongue of the vibration-absorbing lock is an obtuse-angled V-shaped side. The V-shaped side includes a locking surface of the vibration-absorbing lock close to the body of the automotive body panel mold and a damping surface of the vibration-absorbing lock facing away from the body of the automotive body panel mold. The side of the locking tongue of the vibration-absorbing lock facing the movable locking claw of the vibration-absorbing lock is an oblique-angled V-shaped side.

[0015] Preferably, the damping surface of the vibration-absorbing lock has a protruding damping block, which is an elastic polyurethane block.

[0016] Preferably, the lower end face of the vibration-absorbing locking device fixing seat is close to the upper end face of the vibration-absorbing locking device fixing frame, the movable locking claw of the vibration-absorbing locking device is hinged to the upper end face of the vibration-absorbing locking device fixing seat, and the horizontal height of the locking tongue of the vibration-absorbing locking device is the same as the horizontal height of the movable locking claw of the vibration-absorbing locking device.

[0017] A method for operating an automotive body panel mold extension motion device, wherein the automotive body panel mold extension motion device is the precision automotive body panel mold extension motion device.

[0018] In the initial state: the air source of the rodless cylinder is connected in a non-working state, and the rodless cylinder drives the extended surface bracket to the end of the automotive body mold. At this time, the extended automotive body mold insert on the extended surface bracket is in a retracted non-working state, and the locking tongue of the vibration-absorbing lock is separated from the locking claw of the vibration-absorbing lock. At this time, the automotive body mold is retracted to form a gap, and the robot can easily put the large core automotive body part into the automotive body mold.

[0019] During the expansion movement: The air source of the rodless cylinder is connected, and the air source enters the rodless cylinder through the machine tool. At this time, the rodless cylinder slider slides, driving the expansion surface support to move outward through the rodless cylinder. The expansion automotive body panel mold insert moves synchronously to the working position. When the expansion automotive body panel mold insert approaches the working position, the vibration-absorbing locking tongue inserts into the vibration-absorbing locking claw. At this time, the locking surface of the vibration-absorbing locking device is subjected to force, and the force is transmitted to the vibration-absorbing locking device damping block through the movable locking claw. As the rodless cylinder slider reaches the working position, the movable locking claw of the vibration-absorbing locking device also reaches the dead point position. Without the vibration-absorbing locking claw and the vibration-absorbing locking tongue, the air pressure would be suddenly blocked when reaching the working position. This will generate a recoil force that causes the rodless cylinder slider to vibrate and return, resulting in vibration and positional distortion of the automotive body panel mold. However, after installing the vibration-absorbing locking claw and the vibration-absorbing locking tongue, the damping block of the vibration-absorbing locking device continuously experiences increased pressure during movement. The rodless cylinder slider decelerates at a constant speed and, at its dead point, grips the vibration-absorbing locking tongue, generating damping and preventing the rodless cylinder slider from vibrating and returning. This allows for precise positioning of the rodless cylinder. The rodless cylinder slider then drives the extended automotive body panel mold insert on the extended profile bracket to be precisely positioned. At this point, the extended automotive body panel mold insert is precisely positioned to position and support large core automotive body panels or large core automotive body panels with negative angles. The automotive body panel mold can then begin operation in the extended state.

[0020] After the expansion process is completed, the upper mold of the automotive body panel mold is raised. At this time, the air source of the rodless cylinder is connected in a non-working state. The rodless cylinder slider of the rodless cylinder drives the expansion surface support to return. The locking claw of the vibration damping lock is disengaged from the locking tongue of the vibration damping lock under the action of the rodless cylinder slider. The whole device returns to normal state, and the robot can take out the processed large core automotive body panel and enter the initial state of the next round of work.

[0021] Compared with the prior art, the technical solution of the present invention has the following technical effects:

[0022] 1. It enables the expansion of automotive body panel molds using simple and low-cost devices, significantly reducing the size and weight of automotive body panel molds, reducing the cost of adding large-scale trolley mechanisms or processes due to negative angle issues, and reducing the quality impact of process errors. Through actual production applications, it can reduce the size and weight of automotive body panel molds by 15%-45%, reduce the cost of automotive body panel molds by 20%-60%, and reduce the debugging workload caused by process transmission errors by more than 20%.

[0023] 2. This device is simple, convenient, and inexpensive. The vibration-absorbing locking device achieves vibration absorption and locking through damping, avoiding vibration and inaccurate positioning, thus achieving stable and efficient operation of the system.

[0024] 3. The combination of the extended profile bracket and the extended automotive body panel mold insert allows the extended automotive body panel mold insert to be installed and processed in different positions, thereby enabling various types of automotive body panel molds to be precision extended using this device, providing a variety of application methods for the large-scale application of this technology.

[0025] 4. This invention, through in-depth analysis of the structure of automotive body panel molds and molding mechanics analysis, subdivision of molding areas and structural improvements, combined with pneumatic device analysis and stability and anti-rebound experiments, and batch anti-vibration experiments under high-speed and heavy-load conditions, has developed a precision automotive body panel mold extension motion device that can replace the main body of the automotive body panel mold. This device extends the main body of the automotive body panel mold through an extension slide rail, uses a cylinder to realize the rapid movement of the functional modules of the automotive body panel mold, and uses a vibration-absorbing locking device to lock and absorb vibration at the end of the device's stroke. Thus, it successfully realizes the extension of automotive body panel molds using a simple device, eliminating the problem of needing to adjust the stamping angle and increase the number of automotive body panel mold processes for negative angle surfaces. It also changes the problem of high cost, large automotive body panel mold design, and easy vibration damage caused by complex and dense trolley mechanisms. It successfully achieves the goal of reducing the number of automotive body panel mold processes, reducing the size and weight of automotive body panel molds, and improving the quality of large core automotive body panels with a simple device. Attached Figure Description

[0026] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is the assembly drawing of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the extended slide rail structure;

[0029] Figure 3 for Figure 1 Assembly drawing of rodless cylinder, vibration damping locking tongue, and vibration damping locking claw;

[0030] Figure 4 for Figure 3 Schematic diagram of the locking claw of the vibration-absorbing locking device;

[0031] Figure 5 for Figure 3 A schematic diagram of the locking tongue of the vibration-absorbing locking device.

[0032] Explanation of the labels in the attached diagram:

[0033] 1. Extended slide rail: 1.1 Slide rail, 1.2 Slider;

[0034] 2. Expandable surface support;

[0035] 3 rodless cylinders:

[0036] 3.1 Rodless cylinder mounting block; 3.2 Rodless cylinder slider;

[0037] 4. Vibration-absorbing locking claws:

[0038] 4.1 Vibration damping lock holder fixing seat, 4.2 Vibration damping lock holder locking surface, 4.3 Vibration damping lock holder mounting shaft, 4.4 Vibration damping lock holder damping block, 4.5 Vibration damping lock holder movable locking claw, 4.6 Vibration damping lock holder damping surface;

[0039] 5. Vibration-absorbing locking tongue, 6. Vibration-absorbing locking bracket, 7. Extended automotive body panel mold insert. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] A precision automotive body panel mold extension motion device, such as Figures 1-4As shown, the device includes a rodless cylinder 3 and an extended slide rail 1 that are parallel to each other and horizontally connected to the body of the automotive body panel mold. The rodless cylinder slider 3.2 of the rodless cylinder 3 has a vibration-absorbing locking claw 4 connected to its side end face and an extended profile bracket 2 connected to its upper end face. The upper end face of the extended profile bracket 2 is provided with an extended automotive body panel mold insert 7, and the lower end face is slidably engaged with the extended slide rail 1. A vibration-absorbing locking tongue 5 is provided in cooperation with the vibration-absorbing locking claw 4. When the rodless cylinder slider 3.2 drives the vibration-absorbing locking claw 4 to extend horizontally, the vibration-absorbing locking tongue 5 causes the vibration-absorbing locking claw 4 to decelerate uniformly.

[0042] Based on the above embodiments, as a preferred embodiment, the vibration-absorbing locking tongue 5 is disposed on the vibration-absorbing locking bracket 6, and the vibration-absorbing locking bracket 6 is connected to the extended slide rail 1.

[0043] Based on the above embodiments, as a preferred embodiment, the rodless cylinder 3 is connected to the automotive body panel mold body and the vibration damping lock fixing bracket 6 through rodless cylinder mounting blocks 3.1 at both ends, respectively.

[0044] Based on the above embodiments, as a preferred embodiment, two extension slide rails 1 are provided at intervals, the rodless cylinder 3 is located in the middle of the two extension slide rails 1, and the upper end surface of the extension profile bracket 2 is provided with extension car body panel mold inserts 7 near the two extension slide rails 1 respectively.

[0045] Based on the above embodiments, as a preferred embodiment, the two ends of the vibration-absorbing locking bracket 6 are respectively connected to two extended slide rails 1.

[0046] Based on the above embodiments, as a preferred embodiment, the vibration-absorbing locking claw 4 includes a vibration-absorbing locking base 4.1 connected to the side end face of the rodless cylinder slider 3.2. The rodless cylinder slider 3.2 is hinged with a vibration-absorbing locking claw 4.5. The gap between the side end face of the rodless cylinder slider 3.2 and the vibration-absorbing locking claw 4.5 corresponds to the vibration-absorbing locking tongue 5.

[0047] Based on the above embodiments, as a preferred embodiment, the side of the movable locking claw 4.5 of the vibration-absorbing locking device facing the locking tongue 5 of the vibration-absorbing locking device is an obtuse-angled V-shaped side. The V-shaped side includes a vibration-absorbing locking device locking surface 4.2 close to the body of the automotive body panel mold and a vibration-absorbing locking device damping surface 4.6 away from the body of the automotive body panel mold. The side of the locking tongue 5 of the vibration-absorbing locking device facing the movable locking claw 4.5 of the vibration-absorbing locking device is an obtuse-angled V-shaped side.

[0048] Based on the above embodiments, as a preferred embodiment, a protruding vibration-absorbing locking device damping block 4.4 is provided on the damping surface 4.6 of the vibration-absorbing locking device, and the vibration-absorbing locking device damping block 4.4 is an elastic polyurethane block.

[0049] Based on the above embodiments, as a preferred embodiment, the lower end face of the vibration-absorbing locking device fixing seat 4.1 is close to the upper end face of the vibration-absorbing locking device fixing frame 6, the movable locking claw 4.5 of the vibration-absorbing locking device is hinged to the upper end face of the vibration-absorbing locking device fixing seat 4.1, and the horizontal height of the locking tongue 5 of the vibration-absorbing locking device is consistent with the horizontal height of the movable locking claw 4.5 of the vibration-absorbing locking device.

[0050] Based on the above embodiments, a preferred embodiment of the precision automotive body panel mold extension motion device includes seven parts: an extension slide rail 1, an extension profile bracket 2, a rodless cylinder 3, a vibration-absorbing locking claw 4, a vibration-absorbing locking tongue 5, a vibration-absorbing locking bracket 6, and an extension automotive body panel mold insert 7. One end of the extension slide rail 1 is mounted on the automotive body panel mold body, making it a semi-suspended extension suspension. The extension slide rail 1 is a standard part, and the extension profile bracket 2 is installed on the extension slide rail 1 to form a slidable extension functional area for the automotive body panel mold.

[0051] One end of the rodless cylinder 3 is fixed to the expansion profile bracket 2, and the other end is fixed to the body of the automotive body panel mold. When the air source is turned on, the rodless cylinder 3 can drive the expansion profile bracket 2 to move back and forth on the expansion slide rail 1, thereby realizing the free expansion of the functional area of ​​the automotive body panel mold while reducing the size of the automotive body panel mold.

[0052] The vibration-absorbing locking claw 4, together with the vibration-absorbing locking tongue 5 and the vibration-absorbing locking bracket 6, constitute the vibration-absorbing locking device. It is a simple but crucial component, its main function being to limit, lock, and absorb vibrations in the extended surface support 2 without adding electrical control, thereby ensuring precise positioning and anti-vibration functionality of the device. The vibration-absorbing locking claw 4 is fixed to the rodless cylinder 3, the vibration-absorbing locking tongue 5 is fixed to the vibration-absorbing locking bracket 6, and the vibration-absorbing locking bracket 6 is fixed to the extended slide rail 1, thus strengthening the limit on the extended slide rail 1 and fixing the vibration-absorbing locking tongue 5.

[0053] The extended automotive body panel mold insert 7 is fixed on the extended profile support 2. The extended automotive body panel mold insert 7 is positioned according to the shape of the large core automotive body panel and processed into the shape of the automotive body panel mold surface. Simultaneously, the outer extended automotive body panel mold insert 7 can be processed into a negative angle shape, allowing the negative angle surface of the extended automotive body panel mold insert 7 to insert into the large core automotive body panel when the extended profile support 2 moves. Automotive body panel molds generally can only move vertically, and the negative angle of the large core automotive body panel cannot enter the mold. This requires a large-scale trolley mechanism or adding processes to change the stamping angle. However, the extended automotive body panel mold insert 7 moves horizontally, avoiding the problem of not being able to insert and remove the large core automotive body panel during vertical movement. This device enables precise expansion of the automotive body panel mold surface and stable operation under high-speed, heavy-load conditions, thereby reducing automotive body panel mold processes, reducing the size and weight of the automotive body panel mold, improving the quality of the large core automotive body panel, eliminating mechanical vibration, and significantly reducing the manufacturing cost of the automotive body panel mold and the large core automotive body panel.

[0054] The assembly process in this embodiment is as follows:

[0055] 1. First, install slide rail 1.1 of extended slide rail 1 onto the body of the automotive body panel mold and fix it by screwing in the keyway screw. Then, fit slide 1.2 into slide rail 1.1.

[0056] 2. Fix the rodless cylinder mounting block 3.1 of the rodless cylinder 3 to the body of the automotive body panel mold with screws. Fix the vibration damping lock holder 4.1 to the side of the rodless cylinder slider 3.2 with screws. The movable locking claw 4.5 of the vibration damping lock is fixed to the vibration damping lock holder 4.1 through the vibration damping lock mounting shaft 4.3. The upper part of the vibration damping lock mounting shaft 4.3 is a smooth rotating shaft, and the lower part is threaded, which can be screwed into the vibration damping lock holder 4.1.

[0057] 3. Fix both ends of the extended surface support 2 to the slider 1.2 with screws, and fix the middle part of the extended surface support 2 to the rodless cylinder slider 3.2 with screws. In this way, the extended surface support 2 can reciprocate on the slide rail 1.1 by sliding the rodless cylinder slider 3.2.

[0058] 4. Fix the locking tongue 5 of the vibration damping lock to the vibration damping lock fixing bracket 6 with screws.

[0059] 5. Fix the extended automotive body panel mold insert 7 to the extended profile bracket 2 with screws, and process the automotive body panel mold profile and negative angle profile on the extended automotive body panel mold insert 7 according to the functional requirements of the automotive body panel mold, thus completing the installation of the overall device.

[0060] A method for operating an automotive body panel mold extension motion device, wherein the automotive body panel mold extension motion device is the precision automotive body panel mold extension motion device.

[0061] In normal operation: The rodless cylinder 3 is connected to the air source when it is not in operation. The rodless cylinder 3 drives the extended surface bracket 2 to be at the end of the automotive body panel mold. At this time, the extended automotive body panel mold insert 7 on the extended surface bracket 2 is in a retracted non-working state. The vibration-absorbing locking tongue 5 is separated from the vibration-absorbing locking claw 4. At this time, the automotive body panel mold is retracted to form a gap, and the robot can easily put the large core automotive body panel into the automotive body panel mold.

[0062] During the expansion movement: The air source of the rodless cylinder 3 is connected, and the air source enters the rodless cylinder 3 through the machine tool. At this time, the rodless cylinder slider 3.2 of the rodless cylinder 3 slides, driving the expansion surface support 2 to move outward through the rodless cylinder 3. The expansion automotive body panel mold insert 7 moves synchronously to the working position. When the expansion automotive body panel mold insert 7 approaches the working position, the vibration-absorbing locking tongue 5 inserts into the vibration-absorbing locking claw 4. At this time, the vibration-absorbing locking surface 4.2 is subjected to force, and the force is transmitted to the vibration-absorbing locking damping block 4.4 through the vibration-absorbing locking movable claw 4.5. As the rodless cylinder slider 3.2 reaches the working position, the vibration-absorbing locking movable claw 4.5 also reaches the dead point position. If there were no vibration-absorbing locking claw 4 and vibration-absorbing locking tongue 5, the air pressure at the working position would be... A sudden obstruction will generate a recoil force, causing the rodless cylinder slider 3.2 to vibrate and return, resulting in vibration and positional distortion of the automotive body panel mold. However, after installing the vibration-absorbing locking claw 4 and the vibration-absorbing locking tongue 5, the vibration-absorbing locking damping block 4.4 continuously experiences increased pressure during movement. The rodless cylinder slider 3.2 decelerates at a constant speed and, at its dead point, grips the vibration-absorbing locking tongue 5, generating damping and preventing the rodless cylinder slider 3.2 from vibrating and returning. This allows for precise positioning of the rodless cylinder 3. The rodless cylinder slider 3.2 then drives the extended automotive body panel mold insert 7 on the extended profile bracket 2 to be precisely positioned. At this point, the extended automotive body panel mold insert 7 is precisely positioned, providing positioning and support for large core automotive body panels or large core automotive body panels with negative angles. The automotive body panel mold can then begin operation in its extended state.

[0063] After the expansion process is completed, the upper mold of the automotive body panel mold is raised. At this time, the air source of the rodless cylinder 3 is not in operation and is connected. The rodless cylinder slider 3.2 of the rodless cylinder 3 drives the expansion surface support 2 to return. The vibration-absorbing locking claw 4 is disengaged from the vibration-absorbing locking tongue 5 under the action of the rodless cylinder slider 3.2. The entire device returns to normal, and the robot can take out the processed large core automotive body panel and enter the initial state of the next round of work.

[0064] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0065] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or 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 precision automotive body panel mold extension motion device, characterized in that: The system includes a rodless cylinder (3) and an extended slide rail (1) that are parallel to each other and horizontally connected to the body of the automotive body panel mold. The rodless cylinder slider (3.2) of the rodless cylinder (3) is connected to a vibration-absorbing locking claw (4) on its side end face and an extended profile bracket (2) on its upper end face. An extended automotive body panel mold insert (7) is provided on the upper end face of the extended profile bracket (2), and the lower end face is slidably engaged with the extended slide rail (1). A vibration-absorbing locking tongue (5) is provided in cooperation with the vibration-absorbing locking claw (4). When the rodless cylinder slider (3.2) drives the vibration-absorbing locking claw (4) to extend horizontally, the vibration-absorbing locking tongue (5) causes the vibration-absorbing locking claw (4) to decelerate evenly. The vibration-absorbing locking tongue (5) is mounted on the vibration-absorbing locking bracket (6), and the vibration-absorbing locking bracket (6) is connected to the extended slide rail (1); The extended slide rails (1) are arranged in two intervals. The rodless cylinder (3) is located in the middle of the two extended slide rails (1). The upper end face of the extended surface bracket (2) is provided with an extended automotive body panel mold insert (7) near the two extended slide rails (1). The two ends of the vibration-absorbing locking bracket (6) are respectively connected to two extended slide rails (1); The vibration-absorbing locking claw (4) includes a vibration-absorbing locking base (4.1) connected to the side end face of the rodless cylinder slider (3.2). The rodless cylinder slider (3.2) is hinged with a vibration-absorbing locking claw (4.5). The gap between the side end face of the rodless cylinder slider (3.2) and the vibration-absorbing locking claw (4.5) corresponds to the vibration-absorbing locking tongue (5). The side of the movable locking claw (4.5) of the vibration-absorbing locker facing the locking tongue (5) of the vibration-absorbing locker is an obtuse V-shaped side. The V-shaped side includes the locking surface (4.2) of the vibration-absorbing locker close to the body of the automotive body panel mold and the damping surface (4.6) of the vibration-absorbing locker away from the body of the automotive body panel mold. The side of the locking tongue (5) of the vibration-absorbing locker facing the movable locking claw (4.5) of the vibration-absorbing locker is an obtuse V-shaped side. The damping surface (4.6) of the vibration-absorbing lock is provided with a protruding damping block (4.4), which is an elastic polyurethane block.

2. The precision automotive body panel mold extension motion device according to claim 1, characterized in that: The rodless cylinder (3) is connected to the automotive body panel mold body and the vibration damping lock bracket (6) respectively through the rodless cylinder mounting blocks (3.1) at both ends.

3. The precision automotive body panel mold extension motion device according to claim 1 or 2, characterized in that: The lower end face of the vibration-absorbing locking device fixing seat (4.1) is close to the upper end face of the vibration-absorbing locking device fixing frame (6). The movable locking claw (4.5) of the vibration-absorbing locking device is hinged to the upper end face of the vibration-absorbing locking device fixing seat (4.1). The horizontal height of the locking tongue (5) of the vibration-absorbing locking device is the same as the horizontal height of the movable locking claw (4.5) of the vibration-absorbing locking device.

4. A method for operating an extended motion device for an automotive body panel mold, characterized in that: The automotive body panel mold extension motion device is the precision automotive body panel mold extension motion device as described in claim 3; In the initial state: the air source of the rodless cylinder (3) is connected in a non-working state, and the rodless cylinder (3) drives the extended surface bracket (2) to be at the end of the automotive body mold. At this time, the extended automotive body mold insert (7) on the extended surface bracket (2) is in a retracted non-working state, and the vibration-absorbing locking tongue (5) is separated from the vibration-absorbing locking claw (4). At this time, the automotive body mold is retracted to form a gap, and the robot can easily put the large core automotive body into the automotive body mold. During the expansion movement: The air source of the rodless cylinder (3) is connected in the working state. The air source enters the rodless cylinder (3) through the machine tool. At this time, the rodless cylinder slider (3.2) of the rodless cylinder (3) slides. The rodless cylinder (3) drives the expansion surface bracket (2) to move outward. The expansion automotive body panel mold insert (7) moves to the working position in sync. When the expansion automotive body panel mold insert (7) approaches the working position, the vibration absorber locking tongue (5) inserts into the vibration absorber locking claw (4). At this time, the vibration absorber locking surface (4.2) is subjected to force and transmits the force to the vibration absorber damping block (4.4) through the vibration absorber movable locking claw (4.5). As the rodless cylinder slider (3.2) reaches the working position, the vibration absorber movable locking claw (4.5) also reaches the dead point position. If there is no vibration absorber locking claw (4) and vibration absorber locking tongue (5), the working position will be reached. When the air pressure is suddenly blocked at the position, a recoil force will be generated, which will cause the rodless cylinder slider (3.2) to vibrate and return, resulting in vibration and positional distortion of the automotive body panel mold. After the vibration-absorbing locking claw (4) and vibration-absorbing locking tongue (5) are installed, the vibration-absorbing locking damping block (4.4) will be continuously subjected to increasing pressure during the movement. The rodless cylinder slider (3.2) will decelerate at a constant speed and hold the vibration-absorbing locking tongue (5) at the dead point, generating damping to prevent the rodless cylinder slider (3.2) from vibrating and returning, thereby accurately positioning the rodless cylinder (3). The rodless cylinder slider (3.2) will drive the extended automotive body panel mold insert (7) on the extended profile bracket (2) to be accurately positioned. At this time, the extended automotive body panel mold insert (7) is accurately positioned to position and support the large core automotive body panel or the large core automotive body panel with negative angle. The automotive body panel mold can start working in the extended state. When the expansion process is completed, the upper mold of the automotive body panel mold is raised. At this time, the air source of the rodless cylinder (3) is not in working state and is connected. The rodless cylinder slider (3.2) of the rodless cylinder (3) drives the expansion surface bracket (2) to return. The vibration-absorbing locking claw (4) disengages from the vibration-absorbing locking tongue (5) under the drive of the rodless cylinder slider (3.2). The whole device returns to normal state, and the robot can take out the large core automotive body panel that has been processed and enter the initial state of the next round of work.

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