Sand core dip-coating clamp
By designing a sand core dip coating fixture for a pneumatic compression device for cylinder head-type sand core, the problem of sand core falling off during dip coating is solved, and efficient dip coating process and product quality improvement is achieved.
Patent Information
- Application Number
- CN202420246968.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-02-01
AI Technical Summary
In the production process of cylinder head castings, the cylinder head-like sand core is easily fallen off the cover core due to dipping and absorbing water, resulting in product scrapping.
Design a sand core dip coating fixture, using a pneumatic pressure monitoring compression device to ensure that the core remains tight during dip coating and prevents falling off. The fixture is also equipped with servo drive and rotary pneumatic joints, which are suitable for coating immersion processes.
Effectively prevent the core from falling off during dipping coating, ensure product quality, and avoid the risk of crushing the core, achieving uniform coating coverage of the sand core.
Smart Images
Figure CN222588055U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting industry, in particular to a sand core dipping fixture. Background Art
[0002] In the production process of cylinder head castings, the cylinder head sand core adopts the core assembly molding process, and other small cores need to be assembled on the cover plate core by gluing or nailing, and then the whole is dip-coated. In the actual dip-coating process, the small core is easy to fall off from the cover plate core due to water absorption during dip-coating, resulting in the scrapping of the product. For this reason, we propose a sand core dip-coating fixture. Utility Model Content
[0003] The utility model aims to provide a sand core dipping fixture to solve the problems raised in the above background technology.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A sand core dip coating fixture comprises a fixed frame, a robot connection base is arranged at the top center of the fixed frame, a servo motor is arranged at the top right of the fixed frame, a rotating frame is arranged at the bottom of the inner cavity of the fixed frame, rotating pneumatic joints are arranged at the bottom of the left and right sides of the fixed frame, cylinder cover clamping devices are arranged at the left and right sides of the front end surface of the rotating frame, a rotating plate is arranged at the top of the rotating frame, mounting plates are arranged horizontally at the front and rear end surfaces of the top of the rotating plate, pressing cylinders are arranged in sequence from left to right on the top of the rotating plate, and the bottoms of the pressing cylinders are all penetrated by the rotating plate. An extension rod and a clamping pad are provided at the bottom of the extension rod, a driving shaft is provided on the left side of the servo motor, and the driving shaft is located in the top of the right frame inner cavity of the fixed frame, a driving sprocket is provided on the end of the outer wall of the driving shaft away from the servo motor, a flip shaft is provided on the left side of the right rotating pneumatic joint, and the flip shaft is located in the bottom of the right frame inner cavity of the fixed frame, a rotating sprocket is provided on the end of the outer wall of the flip shaft away from the rotating pneumatic joint, a transmission connection chain is provided between the driving sprocket and the rotating sprocket, and a tensioning device matching the chain is provided in the middle of the right frame inner cavity of the fixed frame.
[0006] Furthermore: the fixed frame is arranged in an n-shape, and rectangular slots are arranged on both sides of the top and the bottom of the fixed frame.
[0007] Furthermore: the front and rear end surfaces on both sides of the rotating frame are vertically provided with connecting pieces, the top of the rotating plate is vertically penetrated with fixing holes corresponding to the positions of the connecting pieces, and bolts are provided between the rotating plate and each group of connecting pieces.
[0008] Furthermore: the top of the extension rod is movably connected to the bottom of the pressing cylinder, and the bottom of the extension rod is fitted on the top of the rotating frame through a pressing cushion.
[0009] Furthermore: an oil filling hole is arranged on the top right side of the fixed frame corresponding to the top of the driving sprocket, and a sealing cover is arranged on the top of the oil filling hole in a threaded connection.
[0010] Furthermore: the connecting parts are all arranged in an inverted L shape, and three groups of fixing bolts are arranged between each group of connecting parts and the rotating frame.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The sand core dipping fixture is a special fixture for cylinder head sand cores. A special clamping device for small cores is designed. The clamping adopts pneumatic pressure monitoring to achieve pressure clamping, ensuring that the small core will not fall off during the dipping process and will not crush the core. After the overall dipping, the sand core needs to be rotated to control the dry paint. Servo drive is adopted. At the same time, rotating pneumatic joints are designed on both sides for taking over the clamping device, which is suitable for the paint immersion process. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model;
[0014] Figure 2 This is a schematic diagram of the structure of the rotating plate of the utility model;
[0015] Figure 3 This is a schematic diagram of the connection structure between the servo motor and the right-side rotating pneumatic joint of the utility model.
[0016] In the figure: 1. Fixed frame; 2. Robot connecting base; 3. Servo motor; 4. Rotating frame; 5. Rotating pneumatic joint; 6. Cylinder head clamping device; 7. Mounting plate; 8. Clamping cylinder; 9. Fixing hole; 10. Extension rod; 11. Clamping pad; 12. Drive shaft; 13. Drive sprocket; 14. Chain; 15. Flip shaft; 16. Rotating sprocket; 17. Tensioning device. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] Embodiment 1:
[0019] See also Figure 1-3The utility model provides a technical solution: a sand core dip coating fixture, comprising a fixed frame 1, a robot connection base 2 is arranged at the top center of the fixed frame 1, and the robot connection base 2 can be connected to the robot equipment to operate the overall fixture, a servo motor 3 is arranged at the top of the right side of the fixed frame 1, a rotating frame 4 is arranged at the bottom of the inner cavity of the fixed frame 1, a rotating pneumatic joint 5 is arranged at the bottom of the left and right sides of the fixed frame 1, a cylinder cover clamping device 6 is arranged on the left and right sides of the front end surface of the rotating frame 4, and the rotating frame 4 is provided with a servo motor 3. A rotating plate is arranged on the top, and mounting plates 7 are arranged transversely on the front and rear end surfaces of the top of the rotating plate. Pressing cylinders 8 are arranged on the top of the rotating plate from left to right in sequence, and extension rods 10 are arranged at the bottom of the pressing cylinders 8 through the rotating plate, and pressing pads 11 are arranged at the bottom of the extension rods 10. The pressing cylinders 8 can drive the extension rods 10 and the pressing pads 11 to move up and down, thereby achieving a clamping effect. A driving shaft 12 is arranged on the left side of the servo motor 3, and the driving shaft 12 is located at the top of the inner cavity of the right frame of the fixed frame 1, and the outer wall of the driving shaft 12 is away from the servo motor A driving sprocket 13 is provided at one end of the machine 3, a flip shaft 15 is provided on the left side of the right rotating pneumatic joint 5, and the flip shaft 15 is located at the bottom of the inner cavity of the right frame of the fixed frame 1, and a rotating sprocket 16 is provided at one end of the outer wall of the flip shaft 15 away from the rotating pneumatic joint 5, and a transmission connection chain 14 is connected between the driving sprocket 13 and the rotating sprocket 16. The servo motor 3 drives the driving sprocket 13 to rotate through the driving shaft 12, and the driving sprocket 13 will drive the rotating sprocket 16 to rotate through the chain 14 when rotating, thereby driving the rotating frame 4 to rotate, and the fixed frame A tensioning device 17 cooperating with the chain 14 is arranged in the middle of the inner cavity of the right side frame of the frame 1. The servo motor 3 drives the rotating frame 4 as an overall rotary structure. The rotating pneumatic joint 5 satisfies the 360° rotation of the sand core and is equipped with a sealing structure, which is suitable for the paint immersion process. The dipping process: the robot clamp takes the cylinder head core, the clamping mechanism clamps the small core, the sand core flips 180°, the robot with the clamp and the sand core is immersed in the paint, the sand core is lifted to the paint liquid surface, the sand core rotates forward and reversely to control the dry paint, the sand core flips 180°, the small core is superimposed, the clamping mechanism is released, and the robot finishes releasing the core.
[0020] Among them, preferably, the fixed frame 1 is set to be n-shaped, and rectangular grooves are set on both sides of the top and bottom of the fixed frame 1. This setting can reduce the weight of the entire fixed frame 1 without affecting its structural strength.
[0021] Preferably, connecting pieces are vertically provided on the front and rear end surfaces on the left and right sides of the rotating frame 4, and fixing holes corresponding to the positions of the connecting pieces are vertically penetrated all around the top of the rotating plate, and bolts are provided between the rotating plate and each group of connecting pieces. This arrangement can increase the stability of the connection between the rotating frame 4 and the rotating plate.
[0022] Preferably, the top of the extension rod 10 is movably connected to the bottom of the clamping cylinder 8. This arrangement allows for easy disassembly of the extension rod 10, thereby facilitating replacement of extension rods 10 of different lengths. The bottom of the extension rod 10 is fitted onto the top of the rotating frame 4 via a clamping pad 11.
[0023] Embodiment 2:
[0024] Reference Figure 1-3 This embodiment is different from the first embodiment in that: an oil filling hole is provided on the top right side of the fixed frame 1 corresponding to the top of the driving sprocket 13, and a sealing cover is provided on the top of the oil filling hole through a threaded connection. The sealing cover is opened to add lubricating oil to the driving sprocket 13 through the oil filling hole, so as to achieve the effect of maintenance and lubrication; the connecting parts are all arranged in an inverted L shape, which can facilitate the installation and fixation of the connecting parts, and three groups of fixing bolts are arranged between each group of connecting parts and the rotating frame 4, which can increase the stability of the connection between the connecting parts and the rotating frame 4.
[0025] The electrical appliances mentioned in this article are all connected to an external power source through wires.
[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A sand core dip coating fixture, comprising a fixed frame (1), characterized in that: A robot connection base (2) is arranged at the center of the top of the fixed frame (1), a servo motor (3) is arranged at the top right of the fixed frame (1), a rotating frame (4) is arranged at the bottom of the inner cavity of the fixed frame (1), rotating pneumatic joints (5) are arranged at the bottom of the left and right sides of the fixed frame (1), cylinder cover clamping devices (6) are arranged on the left and right sides of the front end surface of the rotating frame (4), a rotating plate is arranged at the top of the rotating frame (4), mounting plates (7) are arranged transversely on the front and rear end surfaces of the top of the rotating plate, clamping cylinders (8) are arranged in sequence from left to right on the top of the rotating plate, and extension rods (10) are arranged at the bottom of the clamping cylinders (8) penetrating the rotating plate, and clamping soft rods are arranged at the bottom of the extension rods (10). A pad (11), a drive shaft (12) is arranged on the left side of the servo motor (3), and the drive shaft (12) is located in the top of the right frame inner cavity of the fixed frame (1), a drive sprocket (13) is arranged on the outer wall of the drive shaft (12) at one end away from the servo motor (3), a flip shaft (15) is arranged on the left side of the right rotating pneumatic joint (5), and the flip shaft (15) is located in the bottom of the right frame inner cavity of the fixed frame (1), a rotating sprocket (16) is arranged on the outer wall of the flip shaft (15) at one end away from the rotating pneumatic joint (5), a transmission connection chain (14) is connected between the drive sprocket (13) and the rotating sprocket (16), and a tensioning device (17) matched with the chain (14) is arranged in the middle of the right frame inner cavity of the fixed frame (1).
2. A sand core dipping fixture according to claim 1, characterized in that: The fixed frame (1) is arranged in an n-shape, and rectangular slots are arranged on both sides of the top and the bottom of the fixed frame (1).
3. The sand core dipping fixture according to claim 1, characterized in that: Connecting pieces are vertically arranged on the front and rear end surfaces on both sides of the rotating frame (4), fixing holes corresponding to the positions of the connecting pieces are vertically penetrated around the top of the rotating plate, and bolts are arranged between the rotating plate and each group of connecting pieces.
4. The sand core dipping fixture according to claim 1, characterized in that: The top of the extension rod (10) is movably connected to the bottom of the pressing cylinder (8), and the bottom of the extension rod (10) is fitted on the top of the rotating frame (4) via a pressing cushion (11).
5. The sand core dipping fixture according to claim 1, characterized in that: An oil filling hole is provided on the top right side of the fixed frame (1) corresponding to the top of the driving sprocket (13), and a sealing cover is threadedly connected to the top of the oil filling hole.
6. The sand core dipping fixture according to claim 3, characterized in that: The connecting members are all arranged in an inverted L shape, and three groups of fixing bolts are arranged between each group of the connecting members and the rotating frame (4).