Clamping tool for cylinder cover gun hinge machining

Abstract

The utility model belongs to the technical field of cylinder cover machining, and provides a clamping tool for cylinder cover gun hinge machining, which comprises a tool base, a positioning plate connecting block is fixedly mounted on the tool base, a gun hinge positioning plate is fixedly mounted at one end, far away from the tool base, of the positioning plate connecting block, and a machining avoiding hole is formed in the gun hinge positioning plate; a base plate is fixedly installed on the tool base, a lifting supporting plate driven by a lifting oil cylinder is further installed on the tool base in the vertical direction in a sliding mode, and a lifting positioning pin and a lifting supporting nail are arranged on the lifting supporting plate. A first supporting nail is arranged on one side of the positioning plate connecting block, a gun hinge positioning pin and a second supporting nail are arranged on the side, facing the lifting supporting plate, of the gun hinge positioning plate, and the gun hinge positioning plate is further provided with a pressing and holding mechanism used for achieving pressing and holding of the air cylinder cover. According to the cylinder cover positioning and clamping device, accurate positioning and clamping of the cylinder cover can be achieved, clamping is firm and reliable, the cylinder cover is easy and convenient to disassemble and assemble before and after being machined, and the machining efficiency and the machining quality of the cylinder cover are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder head processing, in particular to a clamping tool for gun reaming processing of a cylinder head. Background Technique

[0002] The cylinder head is a box-shaped part with a complex structure, on which intake and exhaust valve seat holes, valve guide holes, spark plug installation holes (for gasoline engines) or injector installation holes are processed. A water jacket, intake and exhaust passages, and a combustion chamber or a part of the combustion chamber are also cast in the cylinder head. The cylinder head is the installation base of the valve mechanism and also the sealing cover of the cylinder. Its functions are to seal the cylinder, jointly form a combustion space with the piston, and bear the action of high-temperature and high-pressure combustion gas. It is a key component with a relatively complex structure, high precision requirements, and complex processing technology. Its processing quality directly affects the overall performance of the engine.

[0003] After the valve guide and valve seat ring are assembled on the cylinder head, gun reaming processing needs to be carried out on the assembled valve guide and valve seat ring. Gun reaming (also known as seat ring and guide processing) generally uses a special composite tool for processing, and the tool structure is fixedly designed according to different requirements such as the size and angle of the seat ring conical surface and the diameter and length of the guide tube. At present, there is still no special clamping tool for effectively positioning and fixing the cylinder head during gun reaming processing of the cylinder head. The conventional method of fixing the cylinder head on the processing machine still requires manual operation by workers. It is not only difficult to accurately position and place the cylinder head and firmly clamp and fix it, but also the disassembly and assembly operations before and after the cylinder head processing are cumbersome and inconvenient. It is impossible to realize the automatic gun reaming processing of the cylinder head, and it is difficult to meet the requirements of the cylinder head assembly line production and processing, thus directly affecting the processing efficiency and processing quality of the cylinder head. Summary of the Utility Model

[0004] In order to overcome the defects of the above-mentioned prior art pointed out, the inventor of the present utility model has conducted in-depth research and completed the present utility model after a large amount of creative labor.

[0005] Specifically, the technical problem to be solved by the present utility model is: to provide a clamping tool for gun reaming processing of a cylinder head to solve the technical problems that the current fixing method for gun reaming processing of the cylinder head is difficult to accurately position and place the cylinder head and firmly clamp and fix it, and the disassembly and assembly operations before and after the cylinder head processing are cumbersome and inconvenient, directly affecting the processing efficiency and processing quality of the cylinder head.

[0006] To solve the above technical problems, the technical solution of the present utility model is:

[0007] A clamping tool for reaming a cylinder head with a gun drill, comprising a tooling base for mounting on a machine tool workbench. A positioning plate connecting block is fixedly mounted on the tooling base. One end of the positioning plate connecting block away from the tooling base is fixedly mounted with a gun drill positioning plate. A machining avoidance hole is provided on the gun drill positioning plate. A clamping space with a cylinder head pick-up and placement opening is formed by enclosing the tooling base, the positioning plate connecting block, and the gun drill positioning plate.

[0008] Two parallelly arranged backing plates are fixedly mounted on the tooling base. A lifting plate driven by a lifting oil cylinder is also slidably mounted on the tooling base in the vertical direction. The lifting plate is located between the two backing plates, and lifting positioning pins and lifting support pins are provided on the lifting plate.

[0009] A first support pin is provided on one side of the positioning plate connecting block facing the cylinder head pick-up and placement opening. A gun drill positioning pin and a second support pin are provided on one side of the gun drill positioning plate facing the lifting plate. A pressing mechanism for pressing the cylinder head is also provided on the gun drill positioning plate.

[0010] As an improved technical solution, the bottom end of the positioning plate connecting block is fixedly connected to the tooling base, and the top end of the positioning plate connecting block is fixedly connected to the gun drill positioning plate.

[0011] The positioning plate connecting block includes integrally formed side panels and a rear baffle. The rear baffle is located between two corresponding side panels, and the rear baffle corresponds to the cylinder head pick-up and placement opening.

[0012] As an improved technical solution, one end of the backing plate extends outside the clamping space, and the other end of the backing plate is close to the rear baffle. A plurality of chip guiding grooves are uniformly provided on the side of the backing plate facing the gun drill positioning plate, and the chip guiding grooves are inclined.

[0013] As an improved technical solution, a guiding plate parallel to the backing plate is also fixedly mounted on the tooling base. Two corresponding guiding plates are provided. The backing plate is located between the two guiding plates, and the guiding plate is higher than the backing plate.

[0014] As an improved technical solution, a linear bearing is fixedly mounted on the tooling base. Guide rods corresponding to the linear bearing are fixedly mounted on the lifting plate. The guide rods are vertically arranged, and the lifting plate is slidably mounted on the tooling base through the linear bearing and the guide rods.

[0015] The lifting oil cylinder is fixedly mounted on the tooling base, and the end of the piston shaft of the lifting oil cylinder is connected to the lifting plate.

[0016] As an improved technical solution, a hollow hole corresponding to the valve guide is formed in the lifting support plate. The lifting positioning pin and the lifting support pin are both fixedly installed on the lifting support plate and are located on the side of the lifting support plate facing the gun reaming positioning plate.

[0017] As an improved technical solution, the first support pin is fixedly installed inside the rear baffle. A side push hydraulic cylinder is fixedly installed outside the rear baffle. The piston shaft end of the side push hydraulic cylinder is connected with a side push rod, and the side push rod movably penetrates through the rear baffle.

[0018] As an improved technical solution, the gun reaming positioning pin and the second support pin are both fixedly installed on the gun reaming positioning plate. The pressing mechanism includes a lever oil cylinder, and the lever oil cylinder is fixedly installed on the gun reaming positioning plate.

[0019] As an improved technical solution, an avoidance groove corresponding to the lever oil cylinder is formed in the side panel.

[0020] As an improved technical solution, a sequence valve is fixedly installed on the tooling base.

[0021] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0022] When the clamping tool for gun reaming of the cylinder head positions and clamps the cylinder head, first place the cylinder head on the backing plate, and then push the cylinder head along the length direction of the backing plate to push the cylinder head into the clamping space. When the cylinder head abuts against the first support pin, the lifting oil cylinder works to drive the lifting support plate to lift. The pre-positioning of the cylinder head is realized through the lifting positioning pin, and the cylinder head is supported through the lifting support pin. Then, the lifting support plate continues to lift the cylinder head, and the positioning of the cylinder head is realized through the gun reaming positioning pin. When the cylinder head abuts against the second support pin, the lifting oil cylinder stops working to complete the positioning of the cylinder head. Finally, the pressing mechanism is used to press and fix the cylinder head. In this way, the positioning and clamping of the cylinder head can be realized. When the cylinder head is in the clamped state, the machining avoidance opening of the gun reaming positioning plate corresponds to the positions of the valve guide and the valve seat ring of the cylinder head, which is convenient for the machining machine tool to perform gun reaming on the cylinder head through the machining avoidance opening. After the machining of the cylinder head is completed, first the pressing mechanism works to release the pressing on the cylinder head, then the lifting oil cylinder drives the lifting support plate to descend and reset, lower the cylinder head onto the backing plate, and finally take out the cylinder head from the clamping space.

[0023] With the clamping fixture for gun reaming machining of the cylinder head, accurate positioning and clamping of the cylinder head can be achieved. The clamping is firm and reliable, and the disassembly and assembly operations before and after the machining of the cylinder head are simple and convenient, facilitating the gun reaming machining of the cylinder head, meeting the requirements of the assembly line production and machining of the cylinder head, and greatly improving the machining efficiency and quality of the cylinder head.

[0024] (2) The provided positioning block connecting plate structure has high structural strength, facilitating the installation and fixation of the gun reaming positioning plate, and at the same time facilitating the formation of a clamping space by enclosing with the tooling base and the gun reaming mounting plate.

[0025] (3) The backing plate supports the cylinder head, facilitating the pushing of the cylinder head to slide and realizing the picking and placing of the cylinder head. The chip guiding groove is provided on the backing plate. During the machining of the cylinder head, the chips that fall will drop into the chip guiding groove during the process of pushing the cylinder head, which can avoid scratching the cylinder head. In addition, the chip guiding groove is inclined, ensuring smooth and stable pushing of the cylinder head.

[0026] (4) The guiding plate installed on the tooling base plays a role of sliding guidance, realizing the sliding limit of the cylinder head and ensuring high accuracy of the sliding displacement of the cylinder head, providing a reliable guarantee for the positioning and placing of the cylinder head.

[0027] (5) The lifting support plate is slidably installed on the tooling base through linear bearings and guide rods. In this way, the stable lifting and lowering of the lifting support plate on the tooling base can be realized, ensuring the stable lifting and lowering of the cylinder head under the drive of the lifting oil cylinder.

[0028] (6) The side push hydraulic cylinder installed on the outer side of the rear baffle and the side push rod driven by the side push hydraulic cylinder. After the machining of the cylinder head is completed and the lifting oil cylinder drives the lifting support plate to lower the cylinder head onto the backing plate, the side push hydraulic cylinder works, driving the side push rod to displace and ejecting the cylinder head, making the removal operation of the cylinder head convenient and labor-saving.

[0029] (7) The pressing mechanism selects a lever oil cylinder, which has a simple structure and can realize the automatic pressing of the cylinder head, making the clamping operation of the cylinder head simple and convenient, and the clamping firm and reliable. Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0031] Figure 1 It is a structural schematic diagram of the clamping fixture for gun reaming machining of the cylinder head of the present invention;

[0032] Figure 2 Another three-dimensional structural schematic diagram of the clamping fixture for gun reaming machining of the cylinder head of the present utility model;

[0033] Figure 3 Another three-dimensional structural schematic diagram of the clamping fixture for gun reaming machining of the cylinder head of the present utility model;

[0034] Figure 4 Front view structural schematic diagram of the clamping fixture for gun reaming machining of the cylinder head of the present utility model;

[0035] Figure 5 Installation structural schematic diagram of the positioning plate connecting block of the present utility model on the fixture base;

[0036] Figure 6 Structural schematic diagram of the fixture base part of the present utility model;

[0037] Figure 7 Structural schematic diagram of the backing plate of the present utility model;

[0038] Figure 8 Installation structural schematic diagram of the lifting support plate of the present utility model;

[0039] Figure 9 Structural schematic diagram of the gun reaming positioning plate part of the present utility model;

[0040] Figure 10 Structural schematic diagram of the clamping state of the cylinder head of the present utility model on the clamping fixture for gun reaming machining of the cylinder head;

[0041] Reference numerals: 1 - machine tool workbench; 2 - fixture base; 3 - positioning plate connecting block; 301 - side panel; 3011 - avoidance groove; 302 - rear baffle; 4 - gun reaming positioning plate; 401 - machining avoidance hole; 5 - backing plate; 501 - chip guiding groove; 6 - lifting oil cylinder; 7 - lifting support plate; 701 - hollow hole; 8 - guiding plate; 9 - linear bearing; 10 - guiding rod; 11 - lifting positioning pin; 12 - lifting support nail; 13 - first support nail; 14 - side push hydraulic cylinder; 15 - side push rod; 16 - gun reaming positioning pin; 17 - second support nail; 18 - lever oil cylinder; 19 - sequence valve; 20 - cylinder head. Detailed implementation manners

[0042] The present utility model will be further described below in conjunction with specific embodiments. However, the uses and purposes of these exemplary embodiments are only used to illustrate the present utility model, and do not constitute any form of limitation to the actual protection scope of the present utility model, nor will the protection scope of the present utility model be limited thereto.

[0043] As Figures 1 to 10As shown together, this embodiment provides a clamping fixture for gun reaming machining of a cylinder head, including a fixture base 2 for mounting on a machine tool workbench 1. A positioning plate connecting block 3 is fixedly installed on the fixture base 2. One end of the positioning plate connecting block 3 away from the fixture base 2 is fixedly installed with a gun reaming positioning plate 4. A machining avoidance hole 401 is provided on the gun reaming positioning plate 4. A clamping space with a cylinder head access opening is formed by enclosing between the fixture base 2, the positioning plate connecting block 3, and the gun reaming positioning plate 4. Two parallel pads 5 are fixedly installed on the fixture base 2. A lifting support plate 7 driven by a lifting oil cylinder 6 is also slidably installed on the fixture base 2 in the vertical direction. The lifting support plate 7 is located between the two pads 5, and lifting positioning pins 11 and lifting support pins 12 are provided on the lifting support plate 7. On one side of the positioning plate connecting block 3 facing the cylinder head access opening, there is a first support pin 13. On one side of the gun reaming positioning plate 4 facing the lifting support plate 7, there are a gun reaming positioning pin 16 and a second support pin 17. A pressing mechanism for pressing the cylinder head 20 is also provided on the gun reaming positioning plate 4.

[0044] As Figures 1 to 5 As shown together, in this embodiment, the bottom end of the positioning plate connecting block 3 is fixedly connected to the fixture base 2, and the top end of the positioning plate connecting block 3 is fixedly connected to the gun reaming positioning plate 4.

[0045] As Figures 1 to 5 As shown together, the positioning plate connecting block 3 includes a side panel 301 and a rear baffle 302 formed integrally. The rear baffle 302 is located between two corresponding side panels 301 and corresponds to the cylinder head access opening. The provided structure of the positioning block connecting plate has high structural strength, facilitates the installation and fixation of the gun reaming positioning plate 4, and at the same time facilitates the formation of a clamping space by enclosing with the fixture base 2 and the gun reaming mounting plate.

[0046] As Figure 1 and Figure 5 As shown together, one end of the pad 5 extends outside the clamping space, and the other end of the pad 5 is close to the rear baffle 302. The pad 5 supports the cylinder head 20, facilitating the sliding displacement of the cylinder head 20 and realizing the access of the cylinder head 20.

[0047] As Figure 1 、 Figures 5 to 7 、 Figure 10 As shown together, a plurality of chip guiding grooves 501 are uniformly provided on one side of the pad 5 facing the gun reaming positioning plate 4, and the chip guiding grooves 501 are inclined. The chip guiding grooves 501 provided on the pad 5 can make the chips falling during the machining of the cylinder head 20 fall into the chip guiding grooves 501 during the process of pushing the cylinder head 20, which can avoid scratching the cylinder head 20. In addition, the inclined setting of the chip guiding grooves 501 can ensure the smooth and stable pushing of the cylinder head 20.

[0048] As Figure 1 、 Figure 2, Figures 4 to 6 , Figure 10 As shown jointly, a guide plate 8 parallel to the backing plate 5 is also fixedly installed on the tooling base 2. There are two corresponding guide plates 8. The backing plate 5 is located between the two guide plates 8, and the guide plate 8 is arranged higher than the backing plate 5. The guide plate 8 plays a role of sliding guidance, realizes the sliding limit of the cylinder head 20, ensures high accuracy of the sliding displacement of the cylinder head 20, and provides a reliable guarantee for the positioning and placement of the cylinder head 20.

[0049] As Figure 6 and Figure 8 As shown jointly, in order to realize the sliding installation of the lifting pallet 7 on the tooling base 2, a linear bearing 9 is fixedly installed on the tooling base 2, and guide rods 10 corresponding to the linear bearing 9 are fixedly installed on the lifting pallet 7. The guide rods 10 are arranged vertically. The lifting pallet 7 is slidably installed on the tooling base 2 through the linear bearing 9 and the guide rods 10, and the lifting pallet 7 is located directly below the gun reaming positioning plate 4; the lifting oil cylinder 6 is fixedly installed on the tooling base 2, and the piston shaft end of the lifting oil cylinder 6 is connected to the lifting pallet 7. The lifting pallet 7 is slidably installed on the tooling base 2 through the linear bearing 9 and the guide rods 10. In this way, the smooth lifting and lowering of the lifting pallet 7 on the tooling base 2 can be realized, and it is ensured that under the drive of the lifting oil cylinder 6, the smooth lifting and lowering of the cylinder head 20 can be realized.

[0050] As Figure 1 , Figure 5 , Figure 6 and Figure 8 As shown jointly, a hollow hole 701 corresponding to the valve guide tube is formed on the lifting pallet 7, and the hollow hole 701 realizes the avoidance of the valve guide tube; the lifting positioning pin 11 and the lifting support pin 12 are both fixedly installed on the lifting pallet 7 and are located on the side of the lifting pallet 7 facing the gun reaming positioning plate 4. In this embodiment, there are two lifting positioning pins 11 and two lifting support pins 12 respectively. The lifting positioning pin 11 realizes the pre-positioning of the cylinder head 20, and the lifting support pin 12 realizes the support of the cylinder head 20.

[0051] As Figures 3 to 5 As shown jointly, the first support pin 13 is fixedly installed on the inner side of the rear baffle 302, a side push hydraulic cylinder 14 is fixedly installed on the outer side of the rear baffle 302, the piston shaft end of the side push hydraulic cylinder 14 is connected with a side push rod 15, and the side push rod 15 movably penetrates through the rear baffle 302. After the cylinder head 20 is processed and the lifting oil cylinder 6 drives the lifting pallet 7 to lower the cylinder head 20 onto the backing plate 5, the side push hydraulic cylinder 14 works, drives the side push rod 15 to displace, and pushes out the cylinder head 20, so that the removal operation of the cylinder head 20 is convenient and labor-saving.

[0052] As Figures 1 to 4 , Figure 9 and Figure 10As shown together, the gun reaming positioning pin 16 and the second support pin 17 are both fixedly installed on the gun reaming positioning plate 4. The pressing mechanism includes a lever oil cylinder 18, and the lever oil cylinder 18 is fixedly installed on the gun reaming positioning plate 4. The lever oil cylinder 18 is selected for the pressing mechanism, which has a simple structure and can realize the automatic pressing of the cylinder head 20, making the clamping operation of the cylinder head 20 simple and convenient, and the clamping firm and reliable.

[0053] As Figures 1 to 3 , Figure 5 and Figure 10 As shown together, the side panel 301 is provided with an avoidance groove 3011 corresponding to the lever oil cylinder 18, and the avoidance groove 3011 realizes the avoidance of the lever oil cylinder 18, facilitating the installation of the lever oil cylinder 18.

[0054] As Figure 3 shown, in this embodiment, a sequence valve 19 is fixedly installed on the tooling base 2. The sequence valve 19 is a valve that controls the action sequence of the actuating elements according to the pressure of the circuit, enabling the lifting oil cylinder 6, the lever oil cylinder 18, and the side push hydraulic cylinder 14 to accurately achieve sequential actions.

[0055] When positioning and clamping the cylinder head 20, first place the cylinder head 20 on the backing plate 5, then push the cylinder head 20 along the length direction of the backing plate 5, push the cylinder head 20 into the clamping space. When the cylinder head 20 abuts against the first support pin 13, the lifting oil cylinder 6 works, driving the lifting support plate 7 to lift. The pre-positioning of the cylinder head 20 is realized through the lifting positioning pin 11, and the support of the cylinder head 20 is realized through the lifting support pin 12. After that, the lifting support plate 7 continues to lift the cylinder head 20, and the positioning of the cylinder head 20 is realized through the gun reaming positioning pin 16. When the cylinder head 20 abuts against the second support pin 17, the lifting oil cylinder 6 stops working, completing the positioning of the cylinder head 20. Finally, the pressing mechanism is used to press and fix the cylinder head 20. In this way, the positioning and clamping of the cylinder head 20 can be realized. When the cylinder head 20 is in the clamped state, the machining avoidance opening of the gun reaming positioning plate 4 corresponds to the positions of the valve guide tube and the valve seat ring of the cylinder head 20, facilitating the machining machine to perform gun reaming on the cylinder head 20 through the machining avoidance opening.

[0056] After the machining of the cylinder head 20 is completed, first the pressing mechanism works to release the pressing on the cylinder head 20, then the lifting oil cylinder 6 drives the lifting support plate 7 to descend and reset, lowering the cylinder head 20 onto the backing plate 5. After that, the side push hydraulic cylinder 14 works, driving the side push rod 15 to move, pushing the cylinder head 20 out of the clamping space. After pushing the cylinder head 20 out, the side push hydraulic cylinder 14 drives the side push rod 15 to reset. Finally, the cylinder head 20 can be removed from the backing plate 5.

[0057] Through the clamping tooling for gun reaming machining of the cylinder head, accurate positioning and clamping of the cylinder head 20 can be achieved. The clamping is firm and reliable, and the disassembly and assembly operations before and after the machining of the cylinder head 20 are simple and convenient, facilitating the gun reaming machining of the cylinder head 20, meeting the requirements of the assembly line production and machining of the cylinder head 20, and greatly improving the machining efficiency and machining quality of the cylinder head 20.

[0058] It should be understood that the use of these embodiments is only for illustrating the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A clamping tool for gun reaming machining of a cylinder head, characterized in that: It includes a tooling base for installation on the machine tool workbench. A positioning plate connecting block is fixedly installed on the tooling base. One end of the positioning plate connecting block away from the tooling base is fixedly installed with a gun reaming positioning plate. A machining avoidance hole is provided on the gun reaming positioning plate. A clamping space with a cylinder head picking and placing opening is formed by enclosing between the tooling base, the positioning plate connecting block and the gun reaming positioning plate; Two parallel pads are fixedly installed on the tooling base. A lifting support plate driven by a lifting oil cylinder is also slidably installed on the tooling base in the vertical direction. The lifting support plate is located between the two pads, and lifting positioning pins and lifting support pins are provided on the lifting support plate; A first support pin is provided on one side of the positioning plate connecting block facing the cylinder head picking and placing opening. A gun reaming positioning pin and a second support pin are provided on one side of the gun reaming positioning plate facing the lifting support plate. A pressing mechanism for pressing the cylinder head is also provided on the gun reaming positioning plate.

2. The clamping tooling for gun reaming machining of the cylinder head according to claim 1, wherein: The bottom end of the positioning plate connecting block is fixedly connected to the tooling base, and the top end of the positioning plate connecting block is fixedly connected to the gun reaming positioning plate; The positioning plate connecting block includes a side panel and a rear baffle which are integrally formed. The rear baffle is located between two corresponding side panels, and the rear baffle corresponds to the cylinder head picking and placing opening.

3. The clamping tooling for gun reaming machining of the cylinder head according to claim 2, wherein: One end of the pad extends outside the clamping space. The other end of the pad is close to the rear baffle, and a plurality of chip guiding grooves are evenly provided on one side of the pad facing the gun reaming positioning plate. The chip guiding grooves are inclined.

4. The clamping tooling for gun reaming machining of the cylinder head according to claim 1, wherein: A guiding plate parallel to the pad is also fixedly installed on the tooling base. There are two corresponding guiding plates. The pad is located between the two guiding plates, and the guiding plate is higher than the pad.

5. The clamping tooling for gun reaming of the cylinder head according to claim 1, characterized in that: A linear bearing is fixedly installed on the tooling base. Guide rods corresponding to the linear bearing are fixedly installed on the lifting support plate. The guide rods are vertically arranged. The lifting support plate is slidably installed on the tooling base through the linear bearing and the guide rods; The lifting oil cylinder is fixedly installed on the tooling base, and the end of the piston shaft of the lifting oil cylinder is connected to the lifting support plate.

6. The clamping tooling for gun reaming machining of the cylinder head according to claim 5, wherein: A hollow hole corresponding to the valve guide tube is provided on the lifting support plate. The lifting positioning pins and the lifting support pins are both fixedly installed on the lifting support plate and are located on the side of the lifting support plate facing the gun reaming positioning plate.

7. The clamping fixture for gun reaming of the cylinder head according to claim 2, characterized in that: The first support pin is fixedly installed on the inner side of the rear baffle. A side push hydraulic cylinder is fixedly installed on the outer side of the rear baffle. The end of the piston shaft of the side push hydraulic cylinder is connected with a side push rod. The side push rod movably penetrates through the rear baffle.

8. The clamping tooling for gun reaming of the cylinder head according to claim 7, characterized in that: The gun reaming positioning pin and the second support pin are both fixedly installed on the gun reaming positioning plate. The pressing mechanism includes a lever oil cylinder, and the lever oil cylinder is fixedly installed on the gun reaming positioning plate.

9. The clamping tooling for gun reaming machining of the cylinder head according to claim 8, wherein: An avoidance groove corresponding to the lever oil cylinder is provided on the side panel.

10. The clamping tooling for gun reaming of the cylinder head according to any one of claims 1-9, characterized in that: A sequence valve is fixedly installed on the tooling base.

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