Full-automatic sand blasting and turning over disc jig

Abstract

The utility model relates to sandblasting automation equipment technical field, concretely relates to a full -automatic sandblasting turnover jig, including sandblasting machine body, turnover subassembly is equipped with turnover subassembly outside sandblasting machine body, and turnover subassembly includes the support frame of installation in sandblasting machine body one side, and one side of support frame is equipped with turnover cylinder, and the output of turnover cylinder is equipped with turnover pillar, buffer subassembly, buffer subassembly installs in turnover subassembly, and buffer subassembly is used for buffering. Compared with the prior art, the application realizes the accurate linkage and power redundancy of workpiece clamping and overall turnover through the symmetrical connecting rod mechanism driven by the turnover cylinder and the small hydraulic cylinder, ensures the high reliability of operation, through the clamping arm structure of integrated torsion spring and soft pad, while providing constant flexible clamping force, effectively avoids the clamping injury and scratch of workpiece surface.

Description

Technical Field

[0001] This utility model relates to the field of automated sandblasting equipment technology, and in particular to a fully automatic sandblasting turning jig. Background Technology

[0002] In modern manufacturing, sandblasting is an important surface treatment process widely used in machinery manufacturing, automotive parts processing, aerospace, and many other fields. Sandblasting can remove impurities such as oxide scale, rust, and burrs from the surface of workpieces, while improving the surface roughness and enhancing the adhesion of coatings or platings, thereby improving the quality and performance of the workpieces.

[0003] With the continuous improvement of industrial automation, the requirements for the efficiency and quality of sandblasting are becoming increasingly stringent. Fully automatic sandblasting equipment has emerged to meet this need, enabling automated control of the sandblasting process and greatly improving production efficiency and the consistency of sandblasting quality. However, in the fully automatic sandblasting process, the workpiece flipping and positioning are crucial steps, directly affecting the sandblasting effect and efficiency.

[0004] Existing automated fixtures still have many shortcomings. First, their clamping mechanisms mostly use simple pneumatic or hydraulic cylinders to directly drive the grippers. The clamping force directly depends on the output pressure of the drive source. Once the power source fluctuates or depressurizes, it is easy to cause insufficient clamping force, and the workpiece is at risk of falling off during the flipping process. At the same time, the rigid clamping method lacks buffering, which easily leaves indentations or scratches on the workpiece surface. For workpieces with high surface quality requirements, such damage is unacceptable. Second, during the process of feeding or leaving the fixture, there is a lack of effective guidance and buffering design. Rigid collisions between the workpiece and the fixture are prone to occur, generating noise and vibration. This not only affects the positioning accuracy, but also leads to premature fatigue damage of key components of the fixture in the long run, affecting the service life and operational stability of the equipment. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a fully automatic sandblasting flipping fixture to solve the problems of unreliable clamping that easily leads to workpiece falling off and rigid clamping that easily damages the workpiece surface in existing automated flipping equipment.

[0006] To achieve the above objectives, this utility model provides a fully automatic sandblasting turning jig, comprising: a sandblasting machine body;

[0007] A tilting assembly is provided on the outer side of the sandblasting machine body. The tilting assembly includes a support frame installed on one side of the sandblasting machine body. A tilting cylinder is provided on one side of the support frame. A tilting support column is provided at the output end of the tilting cylinder. A small hydraulic cylinder is provided at one end of the tilting support column. A connector is installed at the output end of the small hydraulic cylinder. A first connecting arm and a second connecting arm are rotatably installed on the connector. A linkage arm is rotatably installed at one end of the first connecting arm and the second connecting arm that are far apart from each other. A clamping arm is rotatably installed at the other end of the linkage arm.

[0008] A buffer assembly is installed within the flipping assembly and is used for buffering.

[0009] Preferably, a mounting plate is bolted to one side of the outer side of the sandblasting machine body, and a support frame is fixedly mounted on one side of the mounting plate, with the tilting cylinder mounted on the support frame.

[0010] Preferably, a connecting rod is fixedly installed at the end of the tilting support away from the tilting cylinder, and a mounting base is fixedly installed between the two connecting rods, with the small hydraulic cylinder installed inside the mounting base.

[0011] Preferably, the two ends of the linkage arm are respectively provided with a first opening and a second opening. The end of the first connecting arm away from the connector is rotatably mounted on the left side of the first opening, and the end of the second connecting arm away from the connector is rotatably mounted on the right side of the first opening. The first connecting arm and the second connecting arm are arranged opposite to each other at the first opening so as to synchronously drive the linkage arm to retract inward and drive the clamping mechanism to move.

[0012] Preferably, a fixed shaft is fixedly installed inside the second opening, and the clamping arm is rotatably disposed inside the second opening around the fixed shaft. A torsion spring is sleeved on the fixed shaft, one end of the torsion spring abuts against the clamping arm, and the other end abuts against the inner wall of the linkage arm. The torsion spring is used to apply a continuous inward preload to the clamping arm, thereby achieving initial stable clamping of the workpiece without the power source applying additional clamping force.

[0013] Preferably, a soft pad is installed on one side of the clamping arm.

[0014] Preferably, the buffer assembly includes two limiting plates mounted on the tilting support column. The tilting support column is L-shaped, with a limiting plate mounted on one short side and another limiting plate mounted on one long side. A roller is slidably mounted on one side of the limiting plate, and sliders are fixedly mounted on the symmetrical sides of the roller. Sliding grooves are provided on both symmetrical sides of the limiting plate, and the sliders are slidably mounted in the sliding grooves. A buffer spring is fixedly mounted between one side of the slider and one side of the inner wall of the sliding groove.

[0015] Preferably, one side of the linkage arm is slidably mounted on one side of the limiting plate.

[0016] The beneficial effects of this utility model are:

[0017] 1. This fully automatic sandblasting flipping fixture is equipped with a symmetrical linkage clamping mechanism driven by a flipping cylinder, connecting rod, mounting base, and small hydraulic cylinder. This ensures that the workpiece is reliably fixed and accurately flipped. Specifically, when the system issues a command, the small hydraulic cylinder, as the clamping power source, starts first. Its output end pulls the connecting head, thereby forcing the first and second connecting arms to swing inward synchronously. This structure ensures that the power is evenly distributed to the linkage arms on both sides, causing them to retract horizontally inward. Finally, the two clamping arms at the end of the drive are synchronously clamped with the assistance of torsion springs.

[0018] 2. This fully automatic sandblasting flipping fixture effectively protects the workpiece surface from pinching damage and adapts to different contours by incorporating a clamping arm buffer structure including a torsion spring and a soft pad. Furthermore, even in extreme cases where the power source fluctuates or depressurizes, resulting in insufficient clamping force, this structure can maintain stable clamping of the workpiece thanks to the pre-tensioning characteristic of the torsion spring. In this structure, one end of the torsion spring abuts against the clamping arm, providing a continuous initial clamping force. When the clamping arm contacts the workpiece, the elastic deformation of the torsion spring allows the clamping arm to adaptively fine-tune its angle within a certain range to conform to the actual contour of the workpiece. Simultaneously, the soft pad fixed to the clamping arm directly contacts the workpiece surface. Its fundamental purpose is to utilize the flexibility of the soft material to increase friction and prevent slippage, while also forming an effective physical buffer to avoid mechanical damage such as indentations and scratches on the workpiece surface caused by rigid clamping components when applying large clamping forces.

[0019] 3. This fully automatic sandblasting tilting jig uses rollers and buffer springs mounted on the limit plate to smoothly guide the workpiece into position and effectively absorb impact energy. During operation, the rollers on the long side of the tilting support first contact the workpiece. Their free rolling characteristics convert sliding friction into rolling friction, allowing the workpiece to enter smoothly and be accurately positioned with minimal resistance. If an accidental collision or deviation occurs during operation, the impact force acts on the rollers on the short side, forcing the connected slider to move within the sliding groove and compress the buffer spring. The elastic deformation of the spring absorbs and stores the impact energy, and its damping characteristics attenuate the impact force, preventing rigid collisions between the jig and the workpiece. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a first-view structural diagram of the flipping component of this utility model;

[0023] Figure 3 This is a schematic diagram of the second-view structure of the flipping component of this utility model;

[0024] Figure 4 This is a schematic diagram showing the disassembled structure of the flipping component of this utility model;

[0025] Figure 5 This is a schematic diagram showing the disassembled structure of the soft pad, torsion spring, and fixed shaft of this utility model.

[0026] The diagram is marked as follows:

[0027] 1. Sandblasting machine body; 2. Mounting plate; 3. Support frame; 4. Tilting cylinder; 5. Limiting plate; 6. Roller; 7. Mounting base; 8. Connecting rod; 9. Small hydraulic cylinder; 10. Connector; 11. Sliding groove; 12. Slider; 13. Buffer spring; 16. First connecting arm; 17. Second connecting arm; 18. Linkage arm; 19. First opening; 20. Clamping arm; 21. Soft pad; 22. Torsion spring; 23. Fixed shaft; 24. Second opening; 25. Tilting support column. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figures 1 to 5 As shown, the fully automatic sandblasting tilting fixture includes: a sandblasting machine body 1; a tilting assembly, which is provided on the outside of the sandblasting machine body 1, the tilting assembly including a support frame 3 installed on one side of the sandblasting machine body 1, a tilting cylinder 4 on one side of the support frame 3, a tilting support column 25 at the output end of the tilting cylinder 4, a small hydraulic cylinder 9 at one end of the tilting support column 25, a connector 10 installed at the output end of the small hydraulic cylinder 9, a first connecting arm 16 and a second connecting arm 17 rotatably installed on the connector 10, a linkage arm 18 rotatably installed at the ends of the first connecting arm 16 and the second connecting arm 17 that are far apart from each other, and a clamping arm 20 rotatably installed at the other end of the linkage arm 18; and a buffer assembly, which is installed inside the tilting assembly and is used for buffering.

[0031] When the system issues a flipping command, the flipping cylinder 4, as the main drive source, immediately starts, pushing the flipping support column 25 to perform linear motion through its output end. Its direct purpose is to transmit power to the entire flipping assembly, causing it to rotate as a whole around the fulcrum of the support frame 3, thereby flipping the workpiece from its initial position to the preset sandblasting processing position. Before the flipping action begins, the small hydraulic cylinder 9, as the clamping power source, is activated, and its output end pushes the connector 10 to produce displacement. Its core function is to convert the hydraulic thrust into the initial motion of the linkage mechanism. Immediately afterwards, the displacement of the connector 10 forces the first connecting arm 16 and the second connecting arm 17, which are rotatably connected to it, to swing synchronously, ensuring that the power is evenly distributed to both sides. Its key... The purpose is to convert linear thrust into symmetrical mechanical motion to prepare for clamping action. Subsequently, the synchronous swing of the first connecting arm 16 and the second connecting arm 17 drives the two linkage arms 18 to move, forming a scaling mechanism. Its core function is to accurately transmit and amplify the motion of the swing arm to the end actuator. Finally, the linkage arm 18 drives the two clamping arms 20 at its end to perform synchronous inward clamping action until the workpiece is firmly held. Its fundamental purpose is to ensure that the workpiece is reliably fixed in the calibration position before the flipping action begins, preventing it from moving or vibrating during the flipping process, thereby ensuring the consistency of processing quality. The purpose of the buffer assembly is to buffer the clamped object during the flipping clamping process.

[0032] like Figures 2 to 5 As shown, a mounting plate 2 is bolted to one side of the sandblasting machine body 1. A support frame 3 is fixedly mounted on one side of the mounting plate 2, and a tilting cylinder 4 is mounted on the support frame 3. A connecting rod 8 is fixedly mounted at the end of the tilting support column 25 away from the tilting cylinder 4. A mounting seat 7 is fixedly mounted between the two connecting rods 8, and a small hydraulic cylinder 9 is mounted in the mounting seat 7. A first opening 19 and a second opening 24 are respectively opened at both ends of the linkage arm 18. The end of the first connecting arm 16 away from the connector 10 is rotatably mounted on the left side of the first opening 19, and the end of the second connecting arm 17 away from the connector 10 is rotatably mounted on the right side of the first opening 19. The first connecting arm 16 and the second connecting arm 17 are connected to the first connecting arm 18. Two connecting arms 17 are arranged opposite each other at the first opening 19 to synchronously drive the linkage arm 18 to retract inward, thereby actuating the clamping mechanism. A fixed shaft 23 is fixedly installed in the second opening 24. The clamping arm 20 is rotatably disposed in the second opening 24 around the fixed shaft 23. A torsion spring 22 is sleeved on the fixed shaft 23. One end of the torsion spring 22 abuts against the clamping arm 20, and the other end abuts against the inner wall of the linkage arm 18. The torsion spring 22 is used to apply a continuous inward preload to the clamping arm 20, thereby achieving initial stable clamping of the workpiece without the power source applying additional clamping force. A soft pad 21 is installed on one side of the clamping arm 20. One side of the linkage arm 18 is slidably installed on one side of the limiting plate 5.

[0033] When the system needs to flip the workpiece, it first clamps the workpiece, and the small hydraulic cylinder 9, acting as the power source, is activated. Its piston rod retracts, pulling the connector 10 backward. Its direct purpose is to convert hydraulic energy into linear motion, providing initial power for the clamping action. Immediately afterwards, the backward movement of the connector 10 forces the first connecting arm 16 and the second connecting arm 17, which are rotatably connected to it, to swing inward synchronously. Its core function is to convert linear motion into symmetrical linkage motion and ensure that the force on both sides is uniform. Subsequently, the synchronous swinging of the first connecting arm 16 and the second connecting arm 17 will pull the two linkage arms 18 closer to each other in the horizontal direction, thereby reducing the distance between the two linkage arms 18. Its key function is to convert the rotational motion of the swing arm into the horizontal retraction of the linkage arm 18. The clamping arm 20, installed in the second opening 24 of the linkage arm 18, automatically maintains an inward clamping tendency under the elastic force provided by the torsion spring 22 sleeved on the fixed shaft 23. This aims to convert the elastic force of the torsion spring 22 into a continuous clamping force, ensuring stable gripping of the workpiece. Simultaneously, the soft pad 21 fixed to the clamping arm 20 directly contacts the workpiece surface, increasing friction and forming a flexible buffer to effectively prevent damage to the workpiece surface. After the clamping arm 20 is clamped in place under the action of the torsion spring 22, the system issues a flipping command. The flipping cylinder 4, as the main drive source, starts, and its output pushes the flipping support column 25, which in turn drives the entire clamping flipping mechanism through the connecting rod 8 and the mounting base 7. The rotating mechanism rotates around the support point; its ultimate purpose is to smoothly and accurately flip the reliably clamped workpiece to the predetermined position. When the flipping action is completed and the workpiece needs to be released, the small hydraulic cylinder 9 is activated again, its piston rod extends, and pushes the connecting head 10 forward. This action forces the first connecting arm 16 and the second connecting arm 17 to swing outward synchronously, thereby pushing the two linkage arms 18 away from each other, causing the two clamping arms 20 to open, and finally realizing the safe release of the workpiece. In addition, even in extreme cases where the power source fluctuates or depressurizes, resulting in insufficient clamping force, the clamping arm 20 buffer structure of the torsion spring 22 and the soft pad 21 can continue to maintain stable clamping of the workpiece by virtue of the pre-tension characteristic of the torsion spring 22. In the preferred embodiment, the torsion spring 22 should preferably be selected with a torsional stiffness of 0. The free angle and maximum angular displacement allowable value of the torsion spring 22 are set according to the stroke of the clamping arm 20, so that it can provide an end equivalent clamping force of about 50–300N under common workpiece size and quality conditions. The specific clamping force is related to the arm length of the clamping arm 20, the stiffness of the torsion spring 22 and the installation eccentricity, and can be finely adjusted according to the target workpiece quality and material. The material of the soft pad 21 is preferably silicone rubber or polyurethane, with a Shore A hardness range of preferably 30–70 and a thickness of preferably 3–12mm, so as to take into account both anti-slip and anti-indentation performance. Each hinge point, such as the hinge between the connector 10 and the first connecting arm 16 and the second connecting arm 17, should adopt a clearance fit and be equipped with a lubricating oil cup or bearing to reduce wear. The clearance between the slider 12 and the sliding groove 11 is recommended to be 0.1–0.For sandblasting dust environments, it is recommended to install dust covers with wear-resistant coatings or stainless steel materials at the linkage mechanism, fixed shaft 23, and torsion spring 22 to extend service life and facilitate maintenance. (5mm)

[0034] like Figure 4 As shown, the buffer assembly includes two limiting plates 5 installed on the flipping support 25. The flipping support 25 is L-shaped. A limiting plate 5 is installed on one side of the short side of the flipping support 25 and a limiting plate 5 is installed on one end of the long side of the flipping support 25. A roller 6 is slidably installed on one side of the limiting plate 5. A slider 12 is fixedly installed on both sides of the roller 6. A sliding groove 11 is opened on both sides of the limiting plate 5. The slider 12 is slidably installed in the sliding groove 11. A buffer spring 13 is fixedly installed between one side of the slider 12 and one side of the inner wall of the sliding groove 11.

[0035] When the workpiece to be flipped is fed into the flipping area, the roller 6 on the long side of the flipping support 25 first contacts the workpiece. Since the roller 6 can roll freely on the limiting plate 5, its direct purpose is to convert the sliding friction between the workpiece and the fixture into rolling friction, thereby smoothly guiding the workpiece into and accurately positioning it with less resistance, preventing jamming or scratches. If a collision or deviation may occur during the positioning or operation of the workpiece, the impact force generated by the workpiece will act on the roller 6 on the short side of the flipping support 25, forcing the roller 6 to drive the sliders 12 fixed on both sides to perform compression motion within the sliding groove 11 of the limiting plate 5. Its core function is to convert the concentrated impact energy into the linear motion of the slider 12, thereby activating the buffer mechanism. Subsequently, the movement of the slider 12 will continuously compress the buffer spring 13 fixedly installed between it and the inner wall of the sliding groove 11, using the elastic deformation of the spring to absorb and store most of the impact energy. Its key function is to utilize the damping characteristics of the spring. This effectively attenuates the impact force and avoids rigid collisions. Ultimately, the compressed buffer spring 13 releases its stored potential energy after the impact, pushing the slider 12 and roller 6 to reset. The fundamental purpose is to effectively disperse and resolve possible concentrated impact forces through this complete "guidance, contact, compression, and reset" cycle, ensuring smooth and precise flipping action and protecting the fixture and workpiece from damage during interaction. To ensure the safe sequence of clamping and flipping actions, it is preferable to set the following interlock logic in the control system: when the small hydraulic cylinder 9 detects that the clamping is in place and detects that the clamping force reaches the set threshold through a proximity switch or pressure sensor, the flipping cylinder 4 is allowed to start; when the flipping cylinder 4 is not in place or the flipping angle does not reach the set value, the small hydraulic cylinder 9 is prohibited from releasing the workpiece. In addition, it is recommended to set limit switches or encoder feedback, as well as emergency stop buttons and overload protection at both ends of the flipping stroke to prevent overload of the mechanism or injury accidents caused by workpiece jamming or abnormal vibration.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0037] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fully automatic sandblasting tilting jig, characterized in that, include: Sandblasting machine body (1); A flipping assembly is provided on the outside of the sandblasting machine body (1). The flipping assembly includes a support frame (3) installed on one side of the sandblasting machine body (1). A flipping cylinder (4) is provided on one side of the support frame (3). A flipping support column (25) is provided at the output end of the flipping cylinder (4). A small hydraulic cylinder (9) is provided at one end of the flipping support column (25). A connector (10) is installed at the output end of the small hydraulic cylinder (9). A first connecting arm (16) and a second connecting arm (17) are rotatably installed on the connector (10). A linkage arm (18) is rotatably installed at one end of the first connecting arm (16) and the second connecting arm (17) that are far apart from each other. A clamping arm (20) is rotatably installed at the other end of the linkage arm (18). A buffer assembly is installed within the flipping assembly and is used for buffering.

2. The fully automatic sandblasting tilting jig according to claim 1, characterized in that, The outer side of the sandblasting machine body (1) is connected to a mounting plate (2) by bolts. A support frame (3) is fixedly installed on one side of the mounting plate (2). The tilting cylinder (4) is installed on the support frame (3).

3. The fully automatic sandblasting tilting jig according to claim 2, characterized in that, The end of the tilting support (25) away from the tilting cylinder (4) is stacked and fixedly installed with a connecting rod (8), and a mounting base (7) is fixedly installed between the two connecting rods (8). The small hydraulic cylinder (9) is installed in the mounting base (7).

4. The fully automatic sandblasting tilting jig according to claim 3, characterized in that, The linkage arm (18) has a first opening (19) and a second opening (24) at its two ends respectively. The end of the first connecting arm (16) away from the connector (10) is rotatably mounted on the left side of the first opening (19), and the end of the second connecting arm (17) away from the connector (10) is rotatably mounted on the right side of the first opening (19). The first connecting arm (16) and the second connecting arm (17) are arranged opposite to each other at the first opening (19) so as to synchronously drive the linkage arm (18) to retract inward and drive the clamping mechanism to move.

5. The fully automatic sandblasting tilting jig according to claim 4, characterized in that, A fixed shaft (23) is fixedly installed inside the second opening (24). The clamping arm (20) is rotatably disposed inside the second opening (24) around the fixed shaft (23). A torsion spring (22) is sleeved on the fixed shaft (23). One end of the torsion spring (22) abuts against the clamping arm (20), and the other end abuts against the inner wall of the linkage arm (18). The torsion spring (22) is used to apply a continuous inward preload to the clamping arm (20), thereby achieving initial stable clamping of the workpiece without the power source applying additional clamping force.

6. The fully automatic sandblasting tilting jig according to claim 4, characterized in that, A pad (21) is installed on one side of the clamping arm (20).

7. The fully automatic sandblasting tilting jig according to claim 1, characterized in that, The buffer assembly includes two limiting plates (5) installed on the flipping support (25). The flipping support (25) is L-shaped. A limiting plate (5) is installed on one side of the short side of the flipping support (25) and a limiting plate (5) is installed on one end of the long side of the flipping support (25). A roller (6) is slidably installed on one side of the limiting plate (5). A slider (12) is fixedly installed on both sides of the roller (6). A sliding groove (11) is opened on both sides of the limiting plate (5). The slider (12) is slidably installed in the sliding groove (11). A buffer spring (13) is fixedly installed between one side of the slider (12) and one side of the inner wall of the sliding groove (11).

8. The fully automatic sandblasting tilting jig according to claim 7, characterized in that, One side of the linkage arm (18) is slidably mounted on one side of the limiting plate (5).

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