Workpiece shot blasting suspension device and shot blasting method

Abstract

The application discloses a workpiece shot blasting suspension device, which comprises a main body frame, a first supporting piece, a second supporting piece and a third supporting piece, the first supporting piece and the second supporting piece are arranged on opposite sides of the upper part of the main body frame, the third supporting piece is arranged on the lower part of the main body frame, and the supporting points of the first supporting piece, the second supporting piece and the third supporting piece are in triangular distribution. The workpiece shot blasting suspension device has the advantages that the three-point supporting in triangular distribution forms a geometric stable structure, the workpiece can be stably suspended, and the shot blasting effect is improved. The application further discloses a shot blasting treatment method of a workpiece.

Description

Technical Field

[0001] This invention belongs to the field of automobile production equipment technology. Specifically, this invention relates to a workpiece shot blasting suspension device and a shot blasting treatment method. Background Technology

[0002] With the increasing demands for lightweight automotive bodies, hot forming and welding technology for door ring reinforcement plates has been widely adopted. Hot forming of door ring parts generally uses a combination of bare plate forming and shot blasting to remove surface oxide scale.

[0003] Existing shot blasting fixtures typically use four support points for suspension. However, four-point support makes it difficult to ensure effective contact between all support surfaces after the part is suspended. When one support point fails due to wear or deformation, the remaining three support points cannot stably support the workpiece, causing it to shake during shot blasting. This results in uneven shot coverage, large dimensional fluctuations, and poor dimensional consistency of the parts after shot blasting, affecting the shot blasting effect. Furthermore, if the chain running on the shot blasting line shakes, it will further exacerbate the workpiece shaking.

[0004] In addition, the fixed support point positions of the existing hangers cannot be adjusted according to the actual deformation of the support components, which will further deteriorate the shot blasting effect. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a workpiece shot blasting suspension device, the purpose of which is to improve the shot blasting effect.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a workpiece shot blasting suspension device, including a main frame, a first support member, a second support member and a third support member, the first support member and the second support member are disposed on opposite sides of the upper part of the main frame, the third support member is disposed on the lower part of the main frame, and the support points of the first support member, the second support member and the third support member are distributed in a triangular pattern.

[0007] As an improvement to the above solution, the length of the third support member is adjustable.

[0008] As an improvement to the above solution, the third support member includes a third support rod and an adjustable support block. The first end of the third support rod is fixedly connected to the main frame, and the adjustable support block is connected to the second end of the third support rod. The distance between the adjustable support block and the main frame is adjustable.

[0009] As an improvement to the above solution, the workpiece shot blasting suspension device further includes an upper stabilizing reinforcement member disposed on the main frame. The height of the upper stabilizing reinforcement member is greater than the height of the first support member and the second support member, and the thickness of the upper stabilizing reinforcement member is greater than 30mm.

[0010] As an improvement to the above solution, the workpiece shot blasting suspension device further includes a first inclined support rod and a second inclined support rod disposed on the main frame, wherein the first inclined support rod is connected to the first support member and the second inclined support rod is connected to the second support member.

[0011] As an improvement to the above solution, the workpiece shot blasting suspension device further includes a lower end stabilizing rod disposed on the main frame, the height of which is less than the height of the third support member.

[0012] As an improvement to the above solution, at least two lower stabilizing bars are provided, and all lower stabilizing bars are evenly distributed at the lower end of the main frame.

[0013] As an improvement to the above solution, the workpiece is a car body door ring. The first support member and the second support member are configured to provide support for the reinforcing section on the A-pillar of the car body door ring. The third support member is configured to provide support for the sill at the door sill of the car body door ring. The distance between the support point of the first support member and the support point of the second support member is ≥905mm, the distance between the support point of the first support member and the support point of the third support member is ≥805mm, and the distance between the support point of the second support member and the support point of the third support member is ≥1110mm.

[0014] As an improvement to the above solution, the workpiece shot blasting suspension device further includes a storage cover disposed on the main frame, the storage cover having an insert portion that cooperates with the storage rack, and the storage rack having a slot for inserting the insert portion.

[0015] Accordingly, the present invention also provides a shot blasting method for a workpiece, employing the aforementioned workpiece shot blasting suspension device, comprising the following steps:

[0016] The workpiece is mounted on the workpiece shot blasting suspension device;

[0017] Shot blasting is performed on workpieces in a suspended state.

[0018] The step of mounting the workpiece on the workpiece shot blasting suspension device includes:

[0019] Adjust the extension length of the third support relative to the main frame according to the shape of the workpiece;

[0020] The workpiece is suspended on the first support, the second support, and the third support, with the support points of the first support, the second support, and the third support arranged in a triangle.

[0021] The workpiece shot blasting suspension device of the present invention has a geometrically stable structure formed by three triangularly distributed supports, which can stabilize the suspension state of the workpiece and improve the shot blasting effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the workpiece shot blasting suspension device provided in an embodiment of the present invention;

[0023] Figure 2 This is another structural schematic diagram of the workpiece shot blasting suspension device provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the third support member of the shot blasting suspension device provided in an embodiment of the present invention;

[0025] Figure 4 This is a front view of the workpiece shot blasting suspension device in use according to an embodiment of the present invention;

[0026] Figure 5 This is a side view of the workpiece shot blasting suspension device in use according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the support state at the first support member of the shot blasting suspension device provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the support state at the second support member of the shot blasting suspension device provided in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the support state at the third support member of the shot blasting suspension device provided in an embodiment of the present invention;

[0030] Figure 9 This is a schematic flowchart of the shot blasting method for workpieces provided in an embodiment of the present invention;

[0031] The markings in the above figures are as follows: 1. Hanging fixture connecting plate; 2. Storage hanging cover; 3. Upper stabilizing reinforcement; 4. Second support component; 5. First support component; 6. First diagonal support rod; 7. Main frame; 8. Third support component; 9. Lower stabilizing rod; 10. Adjustable support block; 11. Adjusting component; 12. Locking component; 13. Third support rod; 14. Second diagonal support rod; 15. Workpiece; 16. Upper reinforcement section of A-pillar; 17. Threshold. Detailed Implementation

[0032] To make the technical problems, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, in the following embodiments, the terms "first," "second," and "third" do not represent an absolute distinction in structure and / or function, nor do they represent a sequential execution order, but are merely for the convenience of description.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Firstly, such as Figures 1 to 8 As shown, this embodiment of the invention provides a shot blasting suspension device for a workpiece 15, including a main frame 7, a first support member 5, a second support member 4, and a third support member 8. The first support member 5 and the second support member 4 are disposed on opposite sides of the upper part of the main frame 7, and the third support member 8 is disposed on the lower part of the main frame 7. The support points of the first support member 5, the second support member 4, and the third support member 8 are distributed in a triangular pattern.

[0036] Specifically, in the embodiments of the present invention, such as Figure 1 and Figure 2As shown, the main frame 7, the first support member 5, the second support member 4, and the third support member 8 constitute a three-point support structure. The first support member 5 and the second support member 4 are located on opposite sides of the upper part of the main frame 7, while the third support member 8 is located at the lower part of the main frame 7. The support points of the three support members are distributed in a triangle. These three points define a plane, and the three support points provided by the first support member 5, the second support member 4, and the third support member 8 form a stable triangular support surface in space. The suspension posture of the workpiece 15 is uniquely determined by this plane, without any additional constraints. After the workpiece 15 is suspended on the three support members, regardless of how the shot blasting suspension device vibrates during the shot blasting line operation, the support members at the three support points maintain stable contact with the surface of the workpiece 15, and the workpiece 15 will not shake during the shot blasting process. Figure 4 and Figure 5 As shown, the workpiece 15 suspended by the shot blasting suspension device is an automotive body door ring. Because the suspension of workpiece 15 is stable, the impact velocity and contact area of ​​the shot blasting steel balls on both sides of workpiece 15 are uniform, resulting in uniform oxide scale removal and minimal dimensional fluctuations in the parts after shot blasting. Existing technologies generally use four support points, but four-point support makes it difficult to ensure effective contact of all support surfaces after workpiece 15 is suspended. When one support point fails or has manufacturing deviations, the remaining three support points may not be able to stably support workpiece 15, causing it to shake during shot blasting, leading to uneven shot coverage, large dimensional fluctuations, and poor dimensional consistency of the parts after shot blasting. When the shot blasting line chain shakes, the shaking of workpiece 15 will be further exacerbated. In this embodiment of the invention, using three-point support enhances shot blasting stability, better controls deformation changes, and ensures the best shot blasting effect.

[0037] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the top of the main frame 7 is equipped with a hanger connecting plate 1, which is made of 20mm thick 40Cr steel plate. The hanger connecting plate 1 has two oblong holes in the middle, which are used to insert the protruding parts of the shot blasting line. The size of the oblong holes is 7mm × 30mm. During production, the shot blasting suspension device for workpiece 15 is connected to the shot blasting line by the cooperation of the protruding parts of the shot blasting line and the oblong holes. The workpiece 15 shot blasting suspension device, on which workpiece 15 is installed, can be hung on the protruding parts of the shot blasting line. The oblong holes provide a certain tolerance for the insertion of the protruding parts of the shot blasting line, making the loading and unloading of the workpiece 15 shot blasting suspension device easy and smooth, solving the problem of jamming that easily occurs when connecting the existing hanger to the conveyor line. The hanger connecting plate 1 has a relatively large thickness of 20mm, ensuring the strength of the hanging part and preventing tensile deformation or fatigue fracture under the overall weight of the workpiece 15 shot blasting suspension device and workpiece 15.

[0038] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the main frame 7 is equipped with a storage cover 2, which has an insert that mates with a storage rack. The storage rack has a slot for inserting the insert. The storage cover 2 is located below the hanger connecting plate 1, and its height is greater than that of the second support member 4. When the shot blasting operation of the workpiece 15 is completed and the shot blasting suspension device of the workpiece 15 needs to be stored offline, the slot of the storage cover 2 is aligned with the corresponding part of the storage rack and inserted to complete the storage. When used again, it can be directly taken out from the storage rack and put into production. After setting up the storage cover 2, the shot blasting suspension device of the workpiece 15 can be neatly arranged and suspended on the storage rack instead of being scattered, which helps to reduce the floor space occupied during storage.

[0039] In one specific embodiment of the present invention, the storage cover 2 is made of 40Cr steel plate with a thickness of 8mm, which has high structural strength. The storage cover 2 has a U-shaped structure and two embedded parts that cooperate with the storage rack. The main frame 7 is located between the two embedded parts and passes through the center of the storage cover 2. The main frame 7 and the storage cover 2 are connected by welding, so that the storage cover 2 is fixed to the main frame 7.

[0040] The storage rack has slots that mate with the inserts. When storing the shot blasting suspension device for workpiece 15, align the inserts on both sides of the storage cover 2 with the slots on the storage rack and insert them. The shot blasting suspension device for workpiece 15 will then be stably placed on the storage rack. When using it again, simply remove the inserts from the slots and it can be put into production. The opening of the storage cover 2 faces downward, and the U-shaped structure of the storage cover 2 causes the inserts on both sides to extend downward, ensuring smooth storage and retrieval.

[0041] like Figure 1 and Figure 2As shown, the shot blasting suspension device for workpiece 15 in this embodiment of the invention also includes an upper stabilizing reinforcement 3 disposed on the main frame 7. The upper stabilizing reinforcement 3 is made of metal and is welded to the main frame 7. The height of the upper stabilizing reinforcement 3 is greater than the height of the first support 5 and the second support 4. The upper stabilizing reinforcement 3 is located below the storage cover 2. When the upper stabilizing reinforcement 3 is positioned here, during manual loading, the workpiece 15 falls onto the first support 5, the second support 4, and the third support 8. An impact inevitably occurs at the moment the workpiece 15 contacts each support, causing the workpiece 15 and the shot blasting suspension device as a whole to swing. The upper stabilizing reinforcement 3 is disposed at a higher position on the shot blasting suspension device for workpiece 15. Its own mass can increase the moment of inertia of the shot blasting suspension device for workpiece 15 rotating around the hanging point, which can reduce the swing amplitude of the shot blasting suspension device for workpiece 15 when the workpiece 15 is installed too quickly. At the same time, the mass of the upper stabilizing reinforcement 3 makes the center of gravity of the shot blasting suspension device for workpiece 15 tend to be stable, and the workpiece 15 does not sway after being suspended. In addition, the upper stabilizing reinforcement 3 is located near the upper end of the workpiece 15, and can also perform local fine-tuning and calibration of the part's posture to ensure that the workpiece 15 is in a stable suspended state before entering the shot blasting station.

[0042] In one specific embodiment of the present invention, the upper stabilizing reinforcement 3 is made of 40Cr steel plate and has a block structure with a thickness greater than 30mm. The upper stabilizing reinforcement 3 is welded to the main frame 7 by arc welding. The upper stabilizing reinforcement 3 is made of a block structure with a thickness greater than 30mm, which has high structural strength. As a mass body set at a high position on the shot blasting suspension device of workpiece 15, it stabilizes the center of gravity of the entire shot blasting suspension device of workpiece 15 and can reduce the swing amplitude when workpiece 15 is installed too quickly.

[0043] like Figure 1 and Figure 2As shown, the shot blasting suspension device for workpiece 15 in this embodiment of the invention further includes a first inclined support rod 6 and a second inclined support rod 14 disposed on the main frame 7. The first inclined support rod 6 is connected to the first support member 5, and the second inclined support rod 14 is connected to the second support member 4. Specifically, the first inclined support rod 6 is a rod-shaped member, and the first inclined support rod 6 is inclined. Both ends of the first inclined support rod 6 are welded to the main frame 7 and the first support member 5, respectively. The lower end of the first inclined support rod 6 (i.e., the end along the length of the first inclined support rod 6) is fixedly connected to the main frame 7, and the higher end of the first inclined support rod 6 (i.e., the other end along the length of the first inclined support rod 6, which is away from the main frame 7) is fixedly connected to the first support member 5. The length direction of the first inclined support rod 6 and the length direction of the main frame 7 form an angle, and the angle is an acute angle. The second diagonal support rod 14 is a rod-shaped component. The second diagonal support rod 14 is inclined. Both ends of the second diagonal support rod 14 are welded to the main frame 7 and the second support member 4, respectively. The lower end of the second diagonal support rod 14 (i.e., the end along the length of the second diagonal support rod 14) is fixedly connected to the main frame 7, and the higher end of the second diagonal support rod 14 (i.e., the other end along the length of the second diagonal support rod 14, which is away from the main frame 7) is fixedly connected to the second support member 4. There is an angle between the length direction of the second diagonal support rod 14 and the length direction of the main frame 7, and the angle is acute.

[0044] Both the first support member 5 and the second support member 4 are load-bearing components extending outwards from the main frame 7. During shot blasting, the weight of the workpiece 15, the impact force of the shot, and the starting and stopping inertia of the chain all act on the roots of the two support members, which are prone to fatigue deformation under long-term action. After setting the first diagonal support rod 6 and the second diagonal support rod 14, the load-bearing points at the first support member 5 and the second support member 4 form a triangular reinforced structure. The force flow is directly transmitted back to the main frame 7 from the roots of the support members through the diagonal support rods, thereby strengthening the structure and significantly improving its resistance to deformation. The shot blasting suspension device of the workpiece 15 is less prone to fatigue deformation, and the maintenance of consumables can be reduced by more than 50%, thus reducing maintenance and loss costs.

[0045] In this embodiment of the invention, the length of the third support member 8 is adjustable to meet the support requirements of different types of workpieces 15, thereby improving the versatility of the shot blasting suspension device for the workpiece 15. The length direction of the third support member 8 forms an angle with the length direction of the main frame 7, which is approximately 90 degrees. For example, the angle between the length direction of the third support member 8 and the length direction of the main frame 7 can be set to 90 degrees.

[0046] In one specific embodiment of the present invention, such as Figures 1 to 3As shown, the third support member 8 includes a third support rod 13 and an adjustable support block 10. The adjustable support block 10 is used to contact the surface of the workpiece 15 and provide support for the workpiece 15. The first end of the third support rod 13 is fixedly connected to the main frame 7, and the adjustable support block 10 is connected to the second end of the third support rod 13. The distance between the adjustable support block 10 and the main frame 7 is adjustable. The third support rod 13 is provided with an adjusting member 11 and a locking member 12. The adjustable support block 10, the adjusting member 11, and the locking member 12 are threadedly connected to the third support rod 13. An external thread is provided on the outer circumference of the third support rod 13. The adjustable support block 10, the adjusting member 11, and the locking member 12 are arranged sequentially along the axial direction of the third support rod 13. The adjusting member 11 and the locking member 12 are both nuts. The locking member 12 is used to lock and fix the adjusting member 11 to the third support rod 13. After tightening the locking part 12 and the adjusting part 11, the locking part 12 and the adjusting part 11 are in contact, and the adjusting part 11 is in contact with the end face of the adjustable support block 10. This can lock the adjustable support block 10 in the adjusted position, so that the third support part 8 is kept in the adjusted length state, and the locking torque is controlled between 25 N·m and 30 N·m.

[0047] During adjustment, rotate the adjustable support block 10, the adjusting member 11, and the locking member 12 to change the distance between the adjustable support block 10 and the main frame 7, that is, to change the extension length of the third support member 8 relative to the main frame 7, so that the supporting surface of the third support member 8 is accurately aligned with the threshold 17 of the workpiece 15; after the adjustment is in place, first tighten the adjusting member 11 to make the adjusting member 11 align with the end face of the adjustable support block 10 to maintain the adjusted position, and then tighten the locking member 12 to make the locking member 12 align with the adjusting member 11 to complete the final locking.

[0048] The third support component 8 adopts the above structure, which has high length adjustment accuracy and strong adaptability, and can be used for multiple vehicle models. Moreover, it is equipped with double nuts, which has high anti-loosening reliability. This ensures that the third support component 8 can maintain the adjusted length during the shot blasting process of the workpiece 15, and the support position is stable and reliable, which can effectively avoid the shaking of the workpiece 15 caused by the loosening of the support.

[0049] like Figure 1 and Figure 2 As shown, the shot blasting suspension device for workpiece 15 in this embodiment of the invention also includes a lower stabilizing rod 9 disposed on the main frame 7. The height of the lower stabilizing rod 9 is less than the height of the third support member 8, and the lower stabilizing rod 9 has the lowest height. At least two lower stabilizing rods 9 are provided, and all lower stabilizing rods 9 are evenly distributed circumferentially at the lower end of the main frame 7. The lower stabilizing rods 9 are made of metal and have a certain weight. The evenly distributed multiple lower stabilizing rods 9 form a counterweight effect at the lowest end of the shot blasting suspension device for workpiece 15, ensuring the stability of the lower end of the shot blasting suspension device for workpiece 15, preventing the shot blasting suspension device for workpiece 15 from swinging under the shot blasting vibration environment, and further improving the overall stability of the shot blasting suspension device for workpiece 15.

[0050] In one specific embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the lower stabilizer bar 9 is made of 40Cr steel with a diameter of 16mm. Two lower stabilizer bars 9 are provided, arranged symmetrically on the left and right, and are fixedly connected to the main frame 7 by welding. The height of the lower stabilizer bar 9 is less than the height of the third support member 8, that is, the lower stabilizer bar 9 is located below the lower end of the third support member 8.

[0051] The shot blasting suspension device for workpiece 15 in this embodiment is designed for the shot blasting process of removing oxide scale from hot-formed sheet metal stamped parts such as automotive body door rings. After hot forming, the surface of the automotive body door ring is oxidized, requiring shot blasting to remove the surface oxide scale. Shot blasting achieves efficient cleaning by using high-speed shot to impact the metal surface. Figure 4 and Figure 5 As shown, workpiece 15 is a car body door ring. The first support member 5 and the second support member are configured to provide support for the A-pillar reinforcement section 16 of the car body door ring at the A-pillar reinforcement section 16. The third support member is configured to provide support for the sill 17 of the car body door ring at the sill 17. The A-pillar reinforcement section 16 is located below the sill 17. The A-pillar reinforcement section 16 is a component located at the top of the car body door ring. The sill 17 is a component located at the top of the car body door ring. The area between the sill 17 and the A-pillar reinforcement section 16 is a door opening.

[0052] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the first support member 5, the second support member 4, and the third support member 8 are fixedly mounted on the main frame 7. The height of the first support member 5 is less than the height of the second support member 4, and the height of the first support member 5 is greater than the height of the third support member 8. The first support member 5 and the second support member 4 are located on opposite sides of the main frame 7. A first groove is formed on the first support member 5 to allow the workpiece 15 to be embedded, thus forming a first support point. The shape of the first groove matches the shape of the workpiece 15. A second groove is formed on the second support member 4 to allow the workpiece 15 to be embedded, thus forming a second support point. The shape of the second groove matches the shape of the workpiece 15. The first support point and the second support point are located on opposite sides of the main frame 7. A third support point is formed at the contact point between the second support member 4 and the surface of the workpiece 15. The first support point, the second support point, and the third support point are arranged in a triangle, which provides better support stability for the workpiece 15.

[0053] like Figure 4As shown, when workpiece 15 is in a suspended state, the distance between the first support point formed at the first support member 5 and the second support point formed at the second support member 4 is ≥905mm, the distance between the first support point formed at the first support member 5 and the third support point formed at the third support member 8 is ≥805mm, and the distance between the second support point formed at the second support member 4 and the third support point formed at the third support member 8 is ≥1110mm. This size range covers the size requirements of most passenger car door rings. By adjusting the extension length of the third support member 8 relative to the main frame 7, the shot blasting suspension device for workpiece 15 can meet the needs of door rings of different sizes, allowing different car models to share a single shot blasting suspension device for workpiece 15, effectively reducing costs.

[0054] like Figure 4 and Figure 6 As shown, one end of the first support member 5 is connected to the main frame 7 at a height. The first groove is formed at the other end of the first support member 5. The first groove is a V-shaped groove. The first groove forms an opening on the top of the first support member 5 to allow the workpiece 15 to pass through. The included angle between the two surfaces distributed in a V-shape in the first groove is α1. The two surfaces are in contact with the surface of the workpiece 15. α1 is 72° to 76°. In this embodiment of the invention, α1 is 75°, so the opening angle formed on the top of the first support member 5 is relatively large, which makes it easier to pick up and put down the workpiece 15.

[0055] In a specific embodiment of the present invention, the first support member 5 is made of 40Cr steel plate with a diameter of 18mm. The first support member 5 is a bent and formed part with high structural strength. The farthest distance between the first support member 5 and the main frame 7 is 175mm.

[0056] like Figure 4 and Figure 7 As shown, one end of the second support member 4 is connected to the main frame 7 at a height. The second groove is formed at the other end of the second support member 4. The second groove is a V-shaped groove. The second groove forms an opening on the top of the second support member 4 to allow the workpiece 15 to pass through. The included angle between the two surfaces distributed in a V-shape in the second groove is α2. The two surfaces are in contact with the surface of the workpiece 15. α2 is 80° to 82°. In this embodiment of the invention, α2 is 81.7°, so the opening angle formed on the top of the second support member 4 is relatively large, which facilitates the picking and placing of the workpiece 15.

[0057] In a specific embodiment of the present invention, the second support member 4 is made of 40Cr steel plate with a diameter of 18mm. The second support member 4 is a bent and formed part with high structural strength. The farthest distance between the second support member 4 and the main frame 7 is 100mm.

[0058] The difference in distance and angle between the first support member 5 and the second support member 4 conforms to the shape characteristics of the car body door ring, effectively avoiding interference between the upper section of the door ring at the A-pillar and the main frame 7. The existing hanger has an opening angle of only 60° at the upper section. When manually loading the workpiece 15, it is prone to getting stuck in the narrow opening, and when retrieving it, it is also prone to bumping into the hanger, causing deformation. In this embodiment of the invention, the opening angle of the first support member 5 is increased to 75° and the opening angle of the second support member 4 is increased to 81.7°. The opening angle of the workpiece 15 is increased by 15° or more, resulting in a spacious opening. The center of gravity of the suspended workpiece 15 is located in the area between the two support members, allowing for smooth and unobstructed manual loading and retrieval. This improves ergonomics and avoids deformation caused by jamming, bumping, or uneven handling.

[0059] like Figure 4 and Figure 8 As shown, the third support member 8 is disposed at the lower part of the main frame 7. The length of the third support member 8 is adjustable. In a specific embodiment of the present invention, the third support rod 13 is made of 40Cr steel with a diameter of 16mm. The first end of the third support rod 13 is vertically welded and fixedly connected to the main frame 7. The angle between the length direction of the third support rod 13 and the main frame 7 is α3, where α3 is 90°.

[0060] The door rings of different car models have different shapes at the sill 17, resulting in different contact positions between the lower end of the door ring and the third support member 8. Existing hangers have fixed support positions. When there is a deviation between the support surface and the workpiece 15, the lower end of the workpiece 15 is suspended, and the vibration during shot blasting is directly transmitted to the workpiece 15, causing it to shake and deform. In this embodiment of the invention, the adjustable support block 10 can be moved axially along the support rod by rotating the adjusting member 11, changing the distance between the adjustable support block 10 and the main frame 7, i.e., changing the extension length of the third support member 8 relative to the main frame 7, so that the support surface of the third support member 8 accurately fits the door ring sill 17. After adjustment, the locking member 12 is tightened to fix the position of the adjustable support block 10. The structure at the lower support sill 17 is made adjustable, which effectively avoids the problems of unstable center of gravity and the lower end being suspended, reduces shot blasting deformation caused by suspended vibration, and allows one set of workpiece 15 shot blasting suspension device to adapt to the structure of door rings of different car models, achieving multi-model compatibility.

[0061] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the main frame 7 is the load-bearing skeleton of the shot blasting suspension device for workpiece 15. The main frame 7 is made of 40Cr steel with a diameter of 20mm, which has high structural strength and strong resistance to bending and torsion. The main frame 7 is welded to the storage cover 2, the upper stabilizing reinforcement 3 and the hanger connecting plate 1 to form the main body of the shot blasting suspension device for workpiece 15.

[0062] During the fabrication of the shot blasting suspension device for workpiece 15, the main frame 7 is first welded to the first support member 5 and the first diagonal support rod 6 to form the first support point; then it is welded to the second support member 4 and the second diagonal support rod 14 to form the second support point, at which point the upper main structure of the shot blasting suspension device for workpiece 15 is formed; subsequently, it is welded to the third support member 8; the lower stabilizing rod 9 is welded to the bottom of the main frame 7, finally forming the complete shot blasting suspension device for workpiece 15. After all the components are welded together, the shot blasting suspension device for workpiece 15 needs to undergo stress-relief annealing and finally tempering. Stress-relief annealing can eliminate the internal stress generated during welding, preventing deformation of the shot blasting suspension device for workpiece 15 due to stress release during subsequent use; tempering can give 40Cr steel good comprehensive mechanical properties, giving the structure good rigidity and good resistance to plastic deformation under high and medium strength loads, effectively preventing structural deformation caused by uneven spraying of shot blasting steel balls.

[0063] Secondly, such as Figure 9 As shown, this embodiment of the invention also provides a shot blasting method for a workpiece 15, employing a shot blasting suspension device for the workpiece 15 with the above-described structure, and including the following steps:

[0064] S101: Install workpiece 15 onto the shot blasting suspension device for workpiece 15;

[0065] S102: Perform shot blasting on the workpiece 15 in a suspended state.

[0066] In step S101 above, the workpiece 15 is mounted on the shot blasting suspension device, which specifically includes the following steps:

[0067] S201: Adjust the extension length of the third support member 8 relative to the main frame 7 according to the shape of the workpiece 15;

[0068] S202: The workpiece 15 is suspended on the first support member 5, the second support member 4 and the third support member 8, and the support points of the first support member 5, the second support member 4 and the third support member 8 are distributed in a triangle.

[0069] In step S201 above, the extension length of the third support member 8 relative to the main frame 7 is first adjusted according to the shape of the workpiece 15. The adjustment process requires reference to the vehicle model technical drawings to ensure the accurate positioning of the support point formed by the third support member 8. The position of the adjustable support block 10 is adjusted first, and then the position of the adjustable support block 10 is locked using the adjusting member 11 and the locking member 12. The tightening torque of the adjusting member 11 and the locking member 12 needs to be strictly controlled to ensure that the third support member 8 maintains its adjusted length under shot blasting vibration conditions.

[0070] In step S202 above, the workpiece 15 is then suspended on the first support member 5, the second support member 4, and the third support member 8, with the support points of the first support member 5, the second support member 4, and the third support member 8 arranged in a triangular pattern. After the workpiece 15 is suspended in place, the first support member 5 and the second support member 4 are located in the opening of the workpiece 15, the reinforcing section 16 on the A-pillar is secured to the first support member 5 and the second support member 4, and the lower middle end of the threshold 17 is supported by the third support member 8, forming a stable triangular support structure. During the suspension process, it is necessary to confirm the identification mark and orientation of the workpiece 15, check whether there is oil or impurities on the surface of the workpiece 15, and pre-treat and clean the workpiece 15 with oil or impurities; at the same time, check whether the workpiece 15 is in complete contact with each support point of the shot blasting suspension device to ensure that there is no suspension or excessive local stress, and check whether the workpiece 15 is firmly fixed to prevent it from falling off during shot blasting.

[0071] In step S102 above, the workpiece 15 in a suspended state is shot blasted. During the shot blasting process, the swing amplitude of the shot blasting suspension device of the workpiece 15 needs to be monitored in real time to ensure that the swing amplitude is within the allowable range; the removal of oxide scale on the surface of the workpiece 15 is checked through the observation window of the shot blasting equipment to determine whether the oxide scale has been completely removed; the motor current, vibration, noise and other parameters of the shot blasting equipment are checked to ensure that they are normal; the working status of the dust removal system is monitored to ensure that dust emissions meet the standards.

[0072] Finally, remove workpiece 15 after shot blasting. Handle with care during removal to avoid collision damage; check the removal of oxide scale from the surface of workpiece 15 to confirm its completeness; perform dimensional checks to ensure workpiece 15 is not deformed and that critical dimensions are within tolerance; use compressed air to blow away residual shot blasting media and dust from the surface of workpiece 15, and perform rust prevention treatment on workpiece 15 if necessary.

[0073] After each use, the shot blasting suspension device for workpiece 15 needs to be maintained. Check for cracks in each welded part and deal with any cracks found in time; check whether the adjusting part 11, locking part 12 and other components are flexible and reliable to ensure smooth adjustment next time; clean the surface of the shot blasting suspension device for workpiece 15 to prevent rust; regularly check the dimensional accuracy of the shot blasting suspension device for workpiece 15 to ensure that the support positions of the first support 5, the second support 4 and the third support 8 are accurate.

[0074] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A workpiece shot blasting suspension device, characterized in that, It includes a main frame, a first support member, a second support member, and a third support member. The first and second support members are located on opposite sides of the upper part of the main frame, and the third support member is located on the lower part of the main frame. The support points of the first, second, and third support members are distributed in a triangular pattern.

2. The workpiece shot blasting suspension device according to claim 1, characterized in that, The length of the third support member is adjustable.

3. The workpiece shot blasting suspension device according to claim 2, characterized in that, The third support component includes a third support rod and an adjustable support block. The first end of the third support rod is fixedly connected to the main frame, and the adjustable support block is connected to the second end of the third support rod. The distance between the adjustable support block and the main frame is adjustable.

4. The workpiece shot blasting suspension device according to claim 1, characterized in that, It also includes an upper stabilizing reinforcement disposed on the main frame, the height of which is greater than the height of the first support and the second support, and the thickness of which is greater than 30mm.

5. The workpiece shot blasting suspension device according to claim 1, characterized in that, It also includes a first inclined support rod and a second inclined support rod disposed on the main frame, wherein the first inclined support rod is connected to the first support member and the second inclined support rod is connected to the second support member.

6. The workpiece shot blasting suspension device according to claim 1, characterized in that, It also includes a lower stabilizing bar disposed on the main frame, the height of which is less than the height of the third support member.

7. The workpiece shot blasting suspension device according to claim 6, characterized in that, At least two lower stabilizing bars are provided, and all lower stabilizing bars are evenly distributed at the lower end of the main frame.

8. The workpiece shot blasting suspension device according to claim 1, characterized in that, The workpiece is a car body door ring. The first support member and the second support member are configured to provide support for the reinforcing section on the A-pillar of the car body door ring. The third support member is configured to provide support for the door sill of the car body door ring. The distance between the support point of the first support member and the support point of the second support member is ≥905mm, the distance between the support point of the first support member and the support point of the third support member is ≥805mm, and the distance between the support point of the second support member and the support point of the third support member is ≥1110mm.

9. The workpiece shot blasting suspension device according to claim 1, characterized in that, It also includes a storage cover disposed on the main frame, the storage cover having an insert portion that mates with the storage rack, and the storage rack having a slot for inserting the insert portion.

10. A shot blasting treatment method for a workpiece, characterized in that, The workpiece shot blasting suspension device according to any one of claims 1 to 9 includes the following steps: The workpiece is mounted on the workpiece shot blasting suspension device; Shot blasting is performed on workpieces in a suspended state.

11. The shot blasting method according to claim 10, characterized in that, The step of mounting the workpiece on the workpiece shot blasting suspension device includes: Adjust the extension length of the third support relative to the main frame according to the shape of the workpiece; The workpiece is suspended on the first support, the second support, and the third support, with the support points of the first support, the second support, and the third support arranged in a triangle.

Images