A clamping tool for casting production and processing and an operation method thereof

Abstract

This invention belongs to the field of clamping fixture technology, specifically a clamping fixture for casting production and processing and its operating method. The clamping fixture includes a crossbeam, with a hydraulic cylinder fixedly connected to the top of the crossbeam and a set of hangers fixedly connected to the bottom of the crossbeam. Each set of hangers has a set of crossbars fixedly connected to it, and each set of crossbars is slidably connected to a limiting seat. A movable seat is fixedly connected to the bottom of each of the two limiting seats, and a mounting arm is fixedly connected to the bottom of each of the two movable seats. Mounting plates are fixedly connected to the bottom of opposite sides of each of the two mounting arms. Floating chucks are provided on the mounting plates, and support components are provided on each of the two mounting arms. This invention, by setting multiple sets of floating chucks on the mounting plates on both sides, can tightly fit the outer walls of both sides of the cylinder head, better clamping and fixing the cylinder head. By setting the support components, after the floating chucks clamp the cylinder head, they can support the cylinder head from below, reducing the working pressure of the floating chucks and preventing excessive clamping force from damaging the cylinder head surface.

Description

Technical Field

[0001] This invention belongs to the field of clamping tooling technology, specifically a clamping tooling for casting production and processing and its operation method. Background Technology

[0002] The cylinder head is one of the core components of an internal combustion engine. It is generally installed on top of the cylinder block and together with the cylinder block and piston, it forms the combustion chamber. It is the key carrier for the engine to realize the four-stroke cycle of intake, compression, power and exhaust. As a key component of the engine, the processing quality of the cylinder head is directly related to the engine's performance and reliability. During the processing of the cylinder head, precise and stable clamping is an important prerequisite for ensuring processing accuracy and quality.

[0003] In the existing technology, most cylinder heads are thin-walled aluminum alloy castings with uneven wall thickness and uneven surface. The rigidity of the ribs is high and the rigidity of the flat surface is low. This means that when the existing clamping fixture clamps the cylinder head on both sides, the clamping force will be concentrated on the local contact point between the chuck and the cylinder head. This can easily cause indentations, pits and elastic deformation in the thin-walled area on the surface of the cylinder head. In severe cases, it can also cause permanent deformation that cannot be recovered after processing.

[0004] Therefore, the present invention provides a clamping fixture for casting production and processing and its operation method. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the problems mentioned in the background, this invention proposes a clamping fixture for casting production and processing and its operation method.

[0006] The technical solution applicable to solving the technical problem of this invention is as follows: A clamping fixture for casting production and processing according to this invention includes a crossbeam, a hydraulic cylinder is fixedly installed on the top of the crossbeam, a set of hangers is symmetrically fixed to the bottom of the crossbeam, a set of crossbars is symmetrically fixed to each set of hangers, a limit seat is slidably connected to each set of crossbars, a movable seat is fixedly connected to the bottom of each of the two limit seats, a connecting rod is fixedly connected to the top of one of the limit seats, a limit groove is opened on the crossbeam, the top end of the connecting rod passes through the limit groove and is fixedly connected to the output end of the hydraulic cylinder, an installation arm is fixedly connected to the bottom of each of the two movable seats, an installation plate is fixedly connected to the bottom of the opposite sides of the two installation arms, floating chucks are evenly arranged on the installation plate, a support component is provided on each of the two installation arms, and a transmission component is provided at the bottom of the crossbeam.

[0007] The floating chuck is used to conform to the uneven outer walls on both sides of the cylinder head;

[0008] The support assembly is stored on the outside of the mounting arm when the operation is stopped, and can be rotated to the bottom of the mounting plate during operation to assist the floating chuck in supporting the bottom of the cylinder head.

[0009] The transmission assembly is used to drive the two mounting arms to move relative to each other, and assists the floating chucks on the two mounting plates in clamping the cylinder head.

[0010] Preferably, the floating chuck includes a circular seat, a mounting sleeve, and a clamping plate. Multiple sets of circular seats are fixedly connected to opposite sides of the two mounting plates. A T-shaped rod is uniformly fixedly connected to the side of the circular seat away from the mounting plate. A mounting sleeve is provided on the circular seat and is slidably connected to the T-shaped rod. A spring is sleeved on the T-shaped rod, and the two ends of the spring are fixedly connected to the circular seat and the mounting sleeve, respectively. A clamping plate is hinged to the side of the mounting sleeve away from the circular seat. A circular groove is uniformly formed on the side of the clamping plate away from the mounting sleeve, and an annular rubber pad is fixedly connected in the circular groove.

[0011] Preferably, the mounting sleeve has a spherical cavity on the side away from the circular seat, and the spherical cavity has a conical part. A support rod is fixedly connected to the side of the clamping plate near the mounting sleeve, and a ball head is fixedly connected to the end of the support rod near the mounting sleeve. The ball head is adapted to the spherical cavity.

[0012] Preferably, a bracket is fixedly connected to the mounting plate, a vent pipe is fixedly connected to the bracket, a vacuum pump is fixedly installed on the side wall of the mounting plate, the vacuum pump is connected to the vent pipe, an air chamber is opened in the clamping plate, an air hole is opened on the circular groove, the air hole is connected to the air chamber, the annular rubber pad is adapted to the air hole, and an air inlet pipe is evenly connected to the vent pipe, with the end of the air inlet pipe away from the vent pipe connected to the air chamber.

[0013] Preferably, the supporting assembly includes a second hydraulic cylinder, a mounting frame, support arms, and a top plate. The second hydraulic cylinder is fixedly mounted on opposite sides of each of the two mounting arms. The output end of the second hydraulic cylinder is fixedly connected to the mounting frame. A motor is fixedly mounted on one outer wall of the mounting frame. The output end of the motor is fixedly connected to a fixed shaft. A pair of support arms are fixedly connected to the fixed shaft. The bottom ends of each pair of support arms are fixedly connected to a support plate. Several top plates are evenly arranged on the support plate. Guide grooves are provided on the mounting arms, and the mounting frame is slidably connected to the guide grooves.

[0014] Preferably, each of the top plates is provided with a bottom plate below it. The bottom plate is fixedly connected to the support plate. T-shaped rods are uniformly fixed to the bottom of the top plate. The T-shaped rods are slidably connected to the bottom plate. A spring is sleeved on the T-shaped rod. The two ends of the spring are fixedly connected to the top plate and the bottom plate respectively. The top plate has an inclined part at the end away from the support plate, and the inclined part has rounded corners.

[0015] Preferably, a set of arc-shaped frames is fixedly connected to the inner side of the mounting frame, and a pair of support arms are located on the inner side of the mounting frame. Each support arm is fixedly connected to a guide block, and the guide block is slidably connected to the arc-shaped frame.

[0016] Preferably, the transmission assembly includes a fixed seat and a spur gear. The fixed seat is fixedly connected to the bottom center of the crossbeam. The bottom of the fixed seat is rotatably connected to a rotating shaft. The spur gear is fixedly connected to the rotating shaft. Two rack rods are fixedly connected between the opposite sides of the two movable seats. Both rack rods are meshed with the spur gear. A through groove is provided on the movable seat, and the through groove is adapted to the rack rod.

[0017] Preferably, a control module is fixedly installed on the top of the crossbeam, and a patch pressure sensor is installed on the clamping plate. The control module is electrically connected to both the patch pressure sensor and the hydraulic cylinder.

[0018] An operating method for a clamping fixture used in casting production and processing, applicable to the aforementioned clamping fixture, includes the following steps:

[0019] S1: Start hydraulic cylinder one, so that the two moving seats move relative to each other under the meshing transmission of spur gear and rack, thereby causing the clamps on the mounting plates on both sides to move towards the outer wall of the cylinder head;

[0020] S2: When the gap between the clamping plate and the outer wall of the cylinder head is 1-2mm, start the vacuum pump to generate an adsorption force in the annular rubber pad area on the clamping plate, so that the clamping plate is tightly attached to the outer wall of the cylinder head under the further drive of the hydraulic cylinder and achieves clamping and fixing of both sides of the cylinder head.

[0021] S3: After the clamping plates are clamped, start the motor. The motor drives the support arm to rotate, so that the top plate and bottom plate on the support plate rotate to the bottom of the cylinder head. Then, start the second hydraulic cylinder to make the top plate and bottom plate slide down, thus supporting the bottom of the cylinder head.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. The clamping fixture and its operation method for casting production and processing described in this invention, by setting multiple sets of floating chucks on the mounting plates on both sides, can closely fit the outer walls of both sides of the cylinder head, which facilitates better clamping and fixing of the cylinder head; by setting a support component, after the floating chuck clamps the cylinder head, it can support the cylinder head from below, reduce the working pressure of the floating chuck, and avoid damage to the surface of the cylinder head caused by excessive clamping force of the floating chuck.

[0024] 2. The clamping fixture and its operation method for casting production and processing described in this invention, through the hinged arrangement of the clamping plate and the mounting sleeve, allows the clamping plate to make small-angle adjustments according to the contour of the cylinder head outer wall after contacting it. Combined with the annular rubber pad on the clamping plate, this achieves a tight fit against the cylinder head outer wall, eliminating stress concentration. Through the spring between the mounting sleeve and the circular seat, after the clamping plate contacts the cylinder head outer wall, each individual clamping plate can automatically and evenly distribute the clamping force according to the portion of the cylinder head outer wall it is in contact with. This prevents the thin-walled areas of the cylinder head from being crushed and ensures that the thick-ribbed areas do not experience insufficient clamping force. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a perspective view of the cylinder head clamping device of the present invention;

[0027] Figure 2 This is a perspective view of the entire invention;

[0028] Figure 3 This is a perspective view of the limiting seat of the present invention;

[0029] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle;

[0030] Figure 5 This is an exploded view of the mounting sleeve of the present invention;

[0031] Figure 6 This is an exploded view of the clamping plate of the present invention;

[0032] Figure 7 This is an exploded view of the mounting bracket of the present invention;

[0033] Figure 8 yes Figure 7 Enlarged view of section B in the middle.

[0034] In the diagram: 1. Crossbeam; 2. Control module; 3. Hydraulic cylinder one; 4. Limit groove; 5. Connecting rod; 6. Hanger; 7. Crossbar; 8. Limit seat; 9. Moving seat; 10. Rack; 11. Fixed seat; 12. Rotating shaft; 13. Spur gear; 14. Through groove; 15. Mounting arm; 16. Mounting plate; 17. Circular seat; 18. Mounting sleeve; 19. Clamping plate; 20. T-shaped rod one; 21. Spring one; 22. Spherical cavity; 23. Conical part; 24. Support rod; 25. Ball. 26. Head; 27. Circular groove; 28. Air hole; 29. ​​Air chamber; 30. Annular rubber pad; 31. Air inlet pipe; 32. Bracket; 33. Vent pipe; 34. Vacuum pump; 35. Hydraulic cylinder II; 36. Guide groove; 37. Mounting bracket; 38. Motor; 39. Arc frame; 40. Support arm; 41. Fixed shaft; 42. Guide block; 43. Support plate; 44. Base plate; 45. T-shaped rod II; 46. Spring II; 47. Inclined part; 48. Surface mount pressure sensor. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figure 1-2 As shown in the embodiment of the present invention, a clamping fixture for casting production and processing includes a crossbeam 1. A hydraulic cylinder 3 is fixedly installed on the top of the crossbeam 1. A set of hangers 6 are symmetrically fixed to the bottom of the crossbeam 1. A set of crossbars 7 are symmetrically fixed to each set of hangers 6. Each set of crossbars 7 is slidably connected to a limit seat 8. A movable seat 9 is fixedly fixed to the bottom of each of the two limit seats 8. A connecting rod 5 is fixedly fixed to the top of one of the limit seats 8. A limit groove 4 is opened on the crossbeam 1. The top end of the connecting rod 5 passes through the limit groove 4 and is fixedly connected to the output end of the hydraulic cylinder 3. An installation arm 15 is fixedly fixed to the bottom of each of the two movable seats 9. An installation plate 16 is fixedly fixed to the bottom of the opposite sides of the two installation arms 15. Floating clamps are evenly arranged on the installation plate 16. A support component is provided on each of the two installation arms 15. A transmission component is provided at the bottom of the crossbeam 1.

[0037] The floating chuck is used to conform to the uneven outer walls on both sides of the cylinder head;

[0038] When the operation is stopped, the support component is stored on the outside of the mounting arm 15. When the operation is in progress, it can be rotated to the bottom of the mounting plate 16 to assist the floating chuck in supporting the bottom of the cylinder head.

[0039] The transmission assembly is used to drive the two mounting arms 15 to move relative to each other, and assists the floating chucks on the two mounting plates 16 in clamping the cylinder head.

[0040] This application takes into account that cylinder heads are mostly thin-walled aluminum alloy castings with uneven wall thickness, uneven surfaces, high rigidity at the ribs and low rigidity at the flat surfaces. This causes the clamping force to concentrate at the local contact points between the chuck and the cylinder head when existing clamping fixtures clamp the sides of the cylinder head, which can easily cause indentations, pits and elastic deformation in the thin-walled areas on the cylinder head surface. In severe cases, it can even cause permanent deformation that cannot be recovered after machining. To address this, this application sets up multiple floating chucks that can closely fit the outer walls of both sides of the cylinder head, facilitating better clamping and fixing of the cylinder head. By setting up a support component, the cylinder head can be further fixed in conjunction with the floating chucks. After the floating chucks clamp the cylinder head, they support the cylinder head from below, reducing the working pressure of the floating chucks and preventing damage to the cylinder head due to excessive clamping force.

[0041] During operation, hydraulic cylinder 3 drives one of the limiting seats 8 to move, causing the other limiting seat 8 to move relative to it with the help of the transmission component. This, in turn, causes the two moving seats 9 to move relative to the mounting plate 16 on the mounting arm 15, so that the floating chuck clamps and fixes the outer walls of both sides of the cylinder head. At this time, the support component is in the initial position, that is, located on the outside of the mounting arm 15. After the floating chuck clamps the cylinder head, the support component rotates from the outside of the mounting arm 15 to the bottom of the mounting plate 16. After the height is adjusted, it provides auxiliary support to the bottom of the cylinder head, reducing the working pressure of the floating chuck.

[0042] like Figure 2-6 As shown, the floating chuck includes a circular seat 17, a mounting sleeve 18, and a clamping plate 19. Multiple sets of circular seats 17 are fixed to opposite sides of the two mounting plates 16. T-shaped rods 20 are uniformly fixed to the side of the circular seat 17 away from the mounting plate 16. The mounting sleeve 18 is provided on the circular seat 17 and is slidably connected to the T-shaped rod 20. A spring 21 is sleeved on the T-shaped rod 20. The two ends of the spring 21 are fixed to the circular seat 17 and the mounting sleeve 18, respectively. The clamping plate 19 is hinged to the side of the mounting sleeve 18 away from the circular seat 17. Circular grooves 26 are uniformly opened on the side of the clamping plate 19 away from the mounting sleeve 18. An annular rubber pad 29 is fixedly connected in the circular groove 26.

[0043] A spherical cavity 22 is provided on the side of the mounting sleeve 18 away from the circular seat 17. A conical part 23 is provided on the spherical cavity 22. A support rod 24 is fixedly connected to the side of the clamping plate 19 near the mounting sleeve 18. A ball head 25 is fixedly connected to the end of the support rod 24 near the mounting sleeve 18. The ball head 25 is adapted to the spherical cavity 22.

[0044] A bracket 31 is fixedly connected to the mounting plate 16, and a vent pipe 32 is fixedly connected to the bracket 31. A vacuum pump 33 is fixedly installed on the side wall of the mounting plate 16. The vacuum pump 33 is connected to the vent pipe 32. An air chamber 28 is opened in the clamping plate 19. An air hole 27 is opened on the circular groove 26. The air hole 27 is connected to the air chamber 28. An annular rubber pad 29 is adapted to the air hole 27. An air inlet pipe 30 is evenly connected to the vent pipe 32. The end of the air inlet pipe 30 away from the vent pipe 32 is connected to the air chamber 28.

[0045] During operation, with the cooperation of hydraulic cylinder 3 and transmission components, the mounting plates 16 on both sides move closer to the cylinder head sidewall. During this process, because the clamping plate 19 is hinged to the spherical cavity 22 on the mounting sleeve 18 via the support rod 24 and ball head 25, the clamping plate 19, after contacting the outer wall of the cylinder head, can adapt to the curved surface of the cylinder head outer wall and make small angle and position adjustments according to the contour of the cylinder head outer wall. Combined with the evenly distributed annular rubber pads 29 on the clamping plate 19, a tight fit is achieved to the outer wall of the cylinder head, eliminating stress concentration. The spring 21 installed between the sleeve 18 and the circular seat 17 allows each individual clamping plate 19 to automatically and evenly distribute clamping force according to the part of the cylinder head outer wall it is in contact with after the clamping plate 19 comes into contact with it. This prevents the thin-walled area of ​​the cylinder head from being crushed and the thick-rib area from having insufficient clamping force. Through the vacuum pump 33 in conjunction with the vent pipe 32 and the intake pipe 30, the annular rubber pad 29 on the clamping plate 19 can generate negative pressure adsorption force, further enhancing the fixing effect of the clamping plate 19 on the cylinder head.

[0046] It should be noted that in actual operation, if the cylinder head is first clamped by the hydraulic cylinder 3 using the clamping plate 19, and then vacuumed by the vacuum pump 33 using negative pressure, the cylinder head will be mechanically pressed and then pulled by the negative pressure suction force, resulting in a slight positioning offset that affects the centering accuracy. Therefore, during clamping, the hydraulic cylinder 3 drives the clamping plates 19 on both sides to slowly move to both sides of the outer wall of the cylinder head. When the gap between each clamping plate 19 and the outer wall of the cylinder head is 1-2mm, that is, after the operator observes that the clamping plate 19 is in contact with the outer wall of the cylinder head, the vacuum pump 33 is directly turned on to pre-adsorb the cylinder head, allowing the clamping plate 19 to automatically contact the cylinder head. The hydraulic cylinder 3 then continues to output, so that the clamping force reaches the set value. Through the conical part 23 provided on the spherical cavity 22, the support rod 24 can easily drive the clamping plate 19 to make small-angle adjustments.

[0047] like Figure 7-8As shown, the support assembly includes a second hydraulic cylinder 34, a mounting frame 36, a support arm 39, and a top plate 44. The second hydraulic cylinder 34 is fixedly mounted on opposite sides of the two mounting arms 15. The output end of the second hydraulic cylinder 34 is fixedly connected to the mounting frame 36. A motor 37 is fixedly mounted on one outer wall of the mounting frame 36. The output end of the motor 37 is fixedly connected to a fixed shaft 40. A pair of support arms 39 are fixedly connected to the fixed shaft 40. The bottom ends of the pair of support arms 39 are fixedly connected to a support plate 42. Several top plates 44 are evenly arranged on the support plate 42. A guide groove 35 is opened on the mounting arm 15. The mounting frame 36 is slidably connected to the guide groove 35.

[0048] Each top plate 44 is provided with a bottom plate 43 below it. The bottom plate 43 is fixedly connected to the support plate 42. T-shaped rods 45 are evenly fixed to the bottom of the top plate 44. The T-shaped rods 45 are slidably connected to the bottom plate 43. A spring 46 is sleeved on the T-shaped rods 45. The two ends of the spring 46 are fixedly connected to the top plate 44 and the bottom plate 43 respectively. The top plate 44 is provided with an inclined part 47 at the end away from the support plate 42, and the inclined part 47 is provided with rounded corners.

[0049] A set of arc-shaped frames 38 are fixedly connected to the inner side of the mounting frame 36. A pair of support arms 39 are located on the inner side of the mounting frame 36, and a guide block 41 is fixedly connected to each support arm 39. The guide block 41 is slidably connected to the arc-shaped frame 38.

[0050] During operation, before the clamping plate 19 clamps the cylinder head, the guide block 41 on the support arm 39 is located at the top of the arc frame 38. At this time, the support arm 39, support plate 42, top plate 44, and bottom plate 43 are all located outside the mounting arm 15, which facilitates the clamping plate 19 to clamp and fix both sides of the cylinder head first. After the clamping plate 19 clamps both sides of the cylinder head, the operator turns on the motor 37, which drives the fixed shaft 40 to rotate, causing the support arm 39 to drive the guide block 41 to rotate along the arc frame 38. This causes the support plate 42 to rotate to the underside of the mounting plate 16. Then, the operator activates the second hydraulic cylinder 34, which drives the mounting bracket 36 and the support arm 39 to slide upward as a whole. This causes the top plate 44 and the bottom plate 43 to slide upward and contact the bottom of the cylinder head. Through the inclined part 47 on the top plate 44 and the second spring 46, after the top plate 44 contacts the bottom of the cylinder head, each individual top plate 44 can automatically adjust the supporting force according to the bottom area of ​​the cylinder head it is in contact with.

[0051] like Figure 2-3 As shown, the transmission assembly includes a fixed seat 11 and a spur gear 13. The fixed seat 11 is fixedly connected to the bottom center of the crossbeam 1. The bottom of the fixed seat 11 is rotatably connected to a rotating shaft 12. The spur gear 13 is fixedly connected to the rotating shaft 12. Two rack rods 10 are fixedly connected between the opposite sides of the two movable seats 9. Both rack rods 10 are meshed with the spur gear 13. A through groove 14 is provided on the movable seat 9. The through groove 14 is adapted to the rack rod 10.

[0052] During operation, the rack rods 10 on both movable seats 9 mesh with the spur gears 13 to drive the hydraulic cylinder 3 to move the connecting rod 5 within the limiting groove 4. The limiting seat 8 fixed to the connecting rod 5 can drive the limiting seat 8 on the other side to move relative to each other. This causes the two movable seats 9 to drive the two mounting arms 15 to move relative to each other, so that the clamping plates 19 on the mounting plates 16 on both sides can clamp and fix the two sides of the cylinder head.

[0053] like Figure 1 , 2 As shown in Figures 5 and 6, a control module 2 is fixedly installed on the top of the crossbeam 1, and a patch pressure sensor 48 is installed on the clamping plate 19. The control module 2 is electrically connected to the patch pressure sensor 48 and the hydraulic cylinder 3.

[0054] During operation, the patch-type pressure sensor 48 on the clamping plate 19 can monitor the clamping force between the clamping plate 19 and the cylinder head surface in real time and feed it back to the control module 2. The control module 2 can adjust the output value of the hydraulic cylinder 3 according to the clamping force threshold required by different processing steps to achieve precise clamping action, so that cylinder heads of different specifications can be matched with the optimal clamping force.

[0055] An operating method for a clamping fixture used in casting production and processing, applicable to the aforementioned clamping fixture, includes the following steps:

[0056] S1: Start hydraulic cylinder 3, so that the two moving seats 9 move relative to each other under the meshing transmission of spur gear 13 and rack 10, thereby causing the clamping plates 19 on the two mounting plates 16 to move toward the outer wall of the cylinder head.

[0057] S2: When the gap between the clamping plate 19 and the outer wall of the cylinder head is 1-2mm, start the vacuum pump 33, so that the area of ​​the annular rubber pad 29 on the clamping plate 19 generates an adsorption force, and then the clamping plate 19 is further driven by the hydraulic cylinder 3 to fit tightly against the outer wall of the cylinder head, and achieve clamping and fixing of both sides of the cylinder head.

[0058] S3: After clamping plate 19 is clamped, start motor 37. Motor 37 drives support arm 39 to rotate, so that top plate 44 and bottom plate 43 on support plate 42 are rotated to the bottom of cylinder head. Then, start hydraulic cylinder 34 to make top plate 44 and bottom plate 43 slide upward, so as to support the bottom of cylinder head.

[0059] Working principle: Hydraulic cylinder 3 starts and drives the limiting seat 8 on one side of the connecting rod 5 to slide, so that the two moving seats 9 move relative to each other under the meshing transmission of rack rod 10 and spur gear 13, which in turn causes the mounting arms 15 on both sides to drive the mounting plates 16 to move relative to each other. The clamping plates 19 on both sides approach the outer walls of the cylinder head until the gap is 1-2mm. Then, vacuum pump 33 starts. Through air pipe 32 and air inlet pipe 30, negative pressure adsorption force is generated in the area of ​​the annular rubber pad 29 on each clamping plate 19. At this time, during the process of clamping plate 19 adhering to the outer wall of cylinder head, since the support rod 24 and ball head 25 are hinged to the spherical cavity 22 of mounting sleeve 18, Furthermore, a spring 21 is provided between the mounting sleeve 18 and the circular seat 17, so that each clamping plate 19 can fit tightly against the outer wall of the cylinder head and reach the preset clamping force threshold under the drive of the hydraulic cylinder 3, thereby clamping and fixing both sides of the cylinder head. After that, the motor 37 starts and drives the fixed shaft 40 and the support arm 39 to rotate, so that the support plate 42 rotates to the bottom of the mounting plate 16, and drives the top plate 44 and the bottom plate 43 to move to the bottom of the cylinder head. The hydraulic cylinder 34 starts and drives the top plate 44 and the bottom plate 43 to contact the bottom of the cylinder head, thereby supporting the cylinder head and assisting the clamping plate 19 in fixing the cylinder head.

[0060] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0061] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping fixture for casting production and processing, characterized in that: The system includes a crossbeam (1), a hydraulic cylinder (3) is fixedly installed on the top of the crossbeam (1), a set of hangers (6) is symmetrically fixed to the bottom of the crossbeam (1), a set of crossbars (7) is symmetrically fixed to each set of hangers (6), each set of crossbars (7) is slidably connected to a limit seat (8), a movable seat (9) is fixed to the bottom of each of the two limit seats (8), a connecting rod (5) is fixed to the top of one of the limit seats (8), a limit groove (4) is opened on the crossbeam (1), the top of the connecting rod (5) passes through the limit groove (4) and is fixed to the output end of the hydraulic cylinder (3), an installation arm (15) is fixed to the bottom of each of the two movable seats (9), an installation plate (16) is fixed to the bottom of each of the two installation arms (15), floating clamps are evenly arranged on the installation plate (16), a support component is provided on each of the two installation arms (15), and a transmission component is provided at the bottom of the crossbeam (1). The floating chuck is used to conform to the uneven outer walls on both sides of the cylinder head; The support assembly is stored on the outside of the mounting arm (15) when the operation is stopped, and can be rotated to the bottom of the mounting plate (16) during operation to assist the floating chuck in supporting the bottom of the cylinder head. The transmission assembly is used to drive the two mounting arms (15) to move relative to each other, and assists the floating chucks on the two mounting plates (16) in clamping the cylinder head.

2. The clamping fixture for casting production and processing according to claim 1, characterized in that: The floating chuck includes a circular seat (17), a mounting sleeve (18), and a clamping plate (19). Multiple sets of circular seats (17) are fixed to opposite sides of the two mounting plates (16). A T-shaped rod (20) is uniformly fixed to the side of the circular seat (17) away from the mounting plate (16). The mounting sleeve (18) is provided on the circular seat (17). The mounting sleeve (18) is slidably connected to the T-shaped rod (20). A spring (21) is sleeved on the T-shaped rod (20). The two ends of the spring (21) are fixed to the circular seat (17) and the mounting sleeve (18) respectively. A clamping plate (19) is hinged to the side of the mounting sleeve (18) away from the circular seat (17). A circular groove (26) is uniformly opened on the side of the clamping plate (19) away from the mounting sleeve (18). An annular rubber pad (29) is fixed in the circular groove (26).

3. The clamping fixture for casting production and processing according to claim 2, characterized in that: The mounting sleeve (18) has a spherical cavity (22) on the side away from the circular seat (17). The spherical cavity (22) has a conical part (23). The clamping plate (19) is fixedly connected to a support rod (24) on the side near the mounting sleeve (18). The end of the support rod (24) near the mounting sleeve (18) is fixedly connected to a ball head (25). The ball head (25) is adapted to the spherical cavity (22).

4. The clamping fixture for casting production and processing according to claim 3, characterized in that: A bracket (31) is fixedly connected to the mounting plate (16), and a vent pipe (32) is fixedly connected to the bracket (31). A vacuum pump (33) is fixedly installed on the side wall of the mounting plate (16). The vacuum pump (33) is connected to the vent pipe (32). An air chamber (28) is opened in the clamp plate (19). An air hole (27) is opened on the circular groove (26). The air hole (27) is connected to the air chamber (28). The annular rubber pad (29) is adapted to the air hole (27). An air inlet pipe (30) is evenly connected to the vent pipe (32). The end of the air inlet pipe (30) away from the vent pipe (32) is connected to the air chamber (28).

5. The clamping fixture for casting production and processing according to claim 4, characterized in that: The supporting assembly includes a second hydraulic cylinder (34), a mounting bracket (36), a support arm (39), and a top plate (44). The second hydraulic cylinder (34) is fixedly installed on opposite sides of the two mounting arms (15). The output end of the second hydraulic cylinder (34) is fixedly connected to the mounting bracket (36). A motor (37) is fixedly installed on one outer wall of the mounting bracket (36). The output end of the motor (37) is fixedly connected to a fixed shaft (40). A pair of support arms (39) are fixedly connected to the fixed shaft (40). The bottom ends of the pair of support arms (39) are fixedly connected to a support plate (42). Several top plates (44) are evenly arranged on the support plate (42). A guide groove (35) is opened on the mounting arm (15). The mounting bracket (36) is slidably connected to the guide groove (35).

6. The clamping fixture for casting production and processing according to claim 5, characterized in that: Each of the top plates (44) is provided with a bottom plate (43) below it. The bottom plate (43) is fixedly connected to the support plate (42). T-shaped rods (45) are uniformly fixed to the bottom of the top plate (44). The T-shaped rods (45) are slidably connected to the bottom plate (43). A spring (46) is sleeved on the T-shaped rods (45). The two ends of the spring (46) are fixedly connected to the top plate (44) and the bottom plate (43) respectively. An inclined part (47) is provided at the end of the top plate (44) away from the support plate (42), and the inclined part (47) is provided with rounded corners.

7. A clamping fixture for casting production and processing according to claim 6, characterized in that: A set of arc-shaped frames (38) is fixedly connected to the inner side of the mounting frame (36), and a pair of support arms (39) are located on the inner side of the mounting frame (36). Each support arm (39) is fixedly connected to a guide block (41), and the guide block (41) is slidably connected to the arc-shaped frame (38).

8. A clamping fixture for casting production and processing according to claim 7, characterized in that: The transmission assembly includes a fixed seat (11) and a spur gear (13). The fixed seat (11) is fixedly connected to the bottom center of the crossbeam (1). The bottom of the fixed seat (11) is rotatably connected to a rotating shaft (12). The spur gear (13) is fixedly connected to the rotating shaft (12). Two rack rods (10) are fixedly connected between the opposite sides of the two moving seats (9). Both rack rods (10) are meshed with the spur gear (13). A through groove (14) is provided on the moving seat (9). The through groove (14) is adapted to the rack rod (10).

9. A clamping fixture for casting production and processing according to claim 8, characterized in that: A control module (2) is fixedly installed on the top of the crossbeam (1), and a patch pressure sensor (48) is installed on the clamping plate (19). The control module (2) is electrically connected to the patch pressure sensor (48) and the hydraulic cylinder (3).

10. A method for operating a clamping fixture used in casting production and processing, characterized in that: This operating method is applicable to a clamping fixture for casting production and processing as described in claim 8 or 9, and the operating method includes the following steps: S1: Start hydraulic cylinder one (3), so that the two moving seats (9) move relative to each other under the meshing transmission of spur gear (13) and rack (10), thereby causing the clamps (19) on the mounting plates (16) on both sides to move toward the outer wall of the cylinder head; S2: When the gap between the clamping plate (19) and the outer wall of the cylinder head is 1-2mm, start the vacuum pump (33) so that the area of ​​the annular rubber pad (29) on the clamping plate (19) generates an adsorption force, thereby making the clamping plate (19) fit tightly against the outer wall of the cylinder head under the further drive of the hydraulic cylinder (3), and achieve clamping and fixing of both sides of the cylinder head. S3: After the clamping plate (19) is clamped, start the motor (37), and drive the support arm (39) to rotate through the motor (37), so that the top plate (44) and bottom plate (43) on the support plate (42) are rotated to the bottom of the cylinder head. Then, start the hydraulic cylinder (34), so that the top plate (44) and bottom plate (43) slide upward to support the bottom of the cylinder head.

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