Clamping tool for horizontal machining of air cylinder cover

Abstract

The utility model belongs to the technical field of cylinder cover machining, and provides a clamping tool for horizontal machining of a cylinder cover, which comprises a base assembly, and a tool bottom plate is detachably mounted on the base assembly; the tool bottom plate is provided with a plurality of supporting nails used for bearing the cylinder cover, an elastic positioning pin and a rotary positioning piece used for positioning the cylinder cover, and a first pressing mechanism used for pressing the cylinder cover, the supporting nails are arranged, and the rotary positioning piece comprises a positioning head and a rotating rod which are integrally formed; the rotary positioning piece is rotationally installed on the tool bottom plate, the end, away from the positioning head, of the rotary rod is connected with a swing rod, the two sides of the swing rod are provided with a hydraulic single-acting cylinder and a reset pin respectively, and the hydraulic single-acting cylinder and the reset pin are arranged in the swing direction of the swing rod. According to the air cylinder cover positioning and clamping device, the air cylinder cover is easy and convenient to clamp and disassemble, accurate positioning and clamping of the air cylinder cover can be achieved, clamping is firm and reliable, and the machining efficiency and the machining quality of the air 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 fixture for horizontal processing of a cylinder head. Background Art

[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 mounting holes (for gasoline engines) or injector mounting 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 mounting 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] During the production and processing of the cylinder head, the top surface of the cylinder head is usually processed by a horizontal machine tool. Before processing the top surface of the cylinder head, the cylinder head needs to be clamped and fixed to the corresponding clamping fixture to achieve the positioning, installation, and fixation of the cylinder head, and ensure the effective processing of the cylinder head. Since the cylinder head needs to be placed vertically on the horizontal machine tool, the clamping of the cylinder head is difficult. Most of the current clamping fixtures for the cylinder head have complex structures, which not only make the clamping operation cumbersome and inconvenient, but also difficult to achieve the precise positioning and firm clamping of the cylinder head, directly affecting the processing efficiency and quality of the cylinder head. If the operation is improper, it may also cause damage to the cylinder head or even safety accidents. Summary of the Utility Model

[0004] In order to overcome the defects of the prior art pointed out above, 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 fixture for horizontal processing of a cylinder head, so as to solve the technical problems that the current clamping tools for the cylinder head are cumbersome and inconvenient to operate, difficult to achieve the precise positioning and firm clamping of the cylinder head, directly affecting the processing efficiency and quality of the cylinder head, and may also cause damage to the cylinder head or even safety accidents if the operation is improper.

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

[0007] A clamping fixture for horizontal processing of a cylinder head includes a base assembly for mounting on a machine tool workbench, and a tooling base plate is detachably mounted on the base assembly;

[0008] The tooling base plate is provided with support pins for supporting the cylinder head, elastic positioning pins and rotary positioning members for positioning the cylinder head, and a first pressing mechanism for pressing the cylinder head. There are several support pins. The elastic positioning pins are installed on the tooling base plate through positioning pin mounting seats. The rotary positioning member includes an integrally formed positioning head and a rotating rod, and the rotary positioning member is rotatably installed on the tooling base plate. One end of the rotating rod away from the positioning head is connected with a swing rod. Hydraulic single-acting cylinders and return pins are respectively arranged on both sides of the swing rod, and the hydraulic single-acting cylinders and the return pins are arranged along the swinging direction of the swing rod.

[0009] As an improved technical solution, the positioning pin mounting seat is fixedly installed on the tooling base plate, the elastic positioning pin is installed on the positioning pin mounting seat, and the top of the elastic positioning pin is a frustum-shaped structure.

[0010] As an improved technical solution, a positioning member support seat is fixedly installed on the tooling base plate, a bushing is installed on the top of the positioning member support seat, and the rotating rod of the rotary positioning member is rotatably installed on the positioning member support seat through the bushing.

[0011] As an improved technical solution, the top end of the swing rod is fixedly connected with the rotating rod. A limit block is fixedly installed on the tooling base plate. The limit block is located directly below the swing rod, and a limit groove is formed in the limit block. The bottom end of the swing rod extends into the limit groove.

[0012] As an improved technical solution, single-acting cylinder mounting seats and return pin mounting seats are respectively fixedly installed on both sides of the swing rod on the tooling base plate. The hydraulic single-acting cylinder is installed on one side of the single-acting cylinder mounting seat facing the swing rod, and the return pin is installed on one side of the return pin mounting seat facing the swing rod.

[0013] As an improved technical solution, the support pins are fixedly installed on the tooling base plate, and several floating support cylinders are also fixedly installed on the tooling base plate;

[0014] The first pressing mechanism includes first lever cylinders installed on the tooling base plate. There are several first lever cylinders, and the several first lever cylinders respectively correspond to the support pins and the floating support cylinders.

[0015] As an improved technical solution, a lifting eye screw is installed at one end of the tooling base plate.

[0016] As an improved technical solution, the base assembly includes a mounting plate, a vertical plate and a reinforcing rib. The vertical plate is fixedly connected with the mounting plate through the reinforcing rib;

[0017] The vertical plate is provided with a guide rod and a bottom plate positioning pin. The tooling bottom plate is provided with a guide hole corresponding to the guide rod and a positioning hole corresponding to the bottom plate positioning pin. The vertical plate is further provided with a second pressing mechanism for pressing the tooling bottom plate.

[0018] As an improved technical solution, a first pressure maintaining valve, a first energy accumulator and a sequence valve are further installed on the tooling bottom plate, and a second pressure maintaining valve and a second energy accumulator are installed on the vertical plate.

[0019] As an improved technical solution, the second pressing mechanism includes a second lever oil cylinder installed on the vertical plate. There are several second lever oil cylinders, and several second lever oil cylinders are arranged around the tooling bottom plate.

[0020] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0021] When the clamping tooling for horizontal machining of the cylinder head positions and clamps the cylinder head, after the tooling bottom plate is placed flat, first place the intake seat ring hole of the cylinder head facing the elastic positioning pin, and support the cylinder head through the support pins. Then, the hydraulic single-acting cylinder acts, abuts against the swing rod and drives the swing rod to swing. The swing rod drives the rotary positioning member to rotate, so that the rotary positioning member cooperates with the elastic positioning pin to complete the positioning of the cylinder head. At the same time, the swing rod compresses the return pin. After that, the first pressing mechanism acts to realize the pressing and fixing of the cylinder head, thereby completing the positioning and clamping of the cylinder head on the tooling bottom plate. Finally, the tooling bottom plate with the clamped cylinder head is vertically installed and fixed on the base assembly, and then the top surface of the cylinder head can be machined by using a horizontal machine tool. After the machining of the cylinder head is completed, first remove the tooling base together with the cylinder head from the base assembly, and then remove the cylinder head from the tooling bottom plate.

[0022] Through the clamping tooling for horizontal machining of the cylinder head, first clamp the cylinder head onto the flat tooling bottom plate, and then vertically clamp the tooling bottom plate with the clamped cylinder head onto the base assembly, making the clamping and disassembling operations of the cylinder head simple and convenient. It can not only achieve accurate positioning and clamping of the cylinder head, but also the clamping is firm and reliable. After the cylinder head is clamped on the clamping tooling, the top surface of the cylinder head can be machined on a horizontal machine tool, thus greatly improving the machining efficiency and machining quality of the cylinder head. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0024] Figure 1 This is a schematic structural diagram of the clamping tooling for horizontal machining of the cylinder head of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of the clamping state of the cylinder head of the present utility model on the clamping tooling for horizontal machining of the cylinder head;

[0026] Figure 3 This is a schematic structural diagram of the tooling base plate part of the present utility model;

[0027] Figure 4 This is another three-dimensional structural diagram of the tooling base plate part of the present utility model;

[0028] Figure 5 This is a schematic structural diagram of the clamping state of the cylinder head of the present utility model on the tooling base plate;

[0029] Figure 6 This is a schematic structural diagram of the positioning part of the cylinder head of the present utility model;

[0030] Figure 7 This is another three-dimensional structural diagram of the positioning part of the cylinder head of the present utility model;

[0031] Figure 8 This is a schematic structural diagram of the rotary positioning part of the present utility model;

[0032] Figure 9 This is a schematic structural diagram of the limit block of the present utility model;

[0033] Figure 10 This is a schematic structural diagram of the base assembly part of the present utility model;

[0034] Reference numerals: 1 - tooling base plate; 101 - guide hole; 102 - positioning hole; 2 - support pin; 3 - positioning pin mounting seat; 4 - elastic positioning pin; 5 - positioning part support seat; 6 - bushing; 7 - rotary positioning part; 701 - positioning head; 702 - rotating rod; 8 - swing rod; 9 - limit block; 901 - limit groove; 10 - single-acting cylinder mounting seat; 11 - hydraulic single-acting cylinder; 12 - return pin mounting seat; 13 - return pin; 14 - floating support cylinder; 15 - first lever oil cylinder; 16 - lifting eye bolt; 17 - first pressure maintaining valve; 18 - first energy storage device; 19 - sequence valve; 20 - mounting plate; 21 - vertical plate; 22 - reinforcing rib; 23 - guide rod; 24 - base plate positioning pin; 25 - second pressure maintaining valve; 26 - second energy storage device; 27 - second lever oil cylinder; 28 - machine tool workbench; 29 - cylinder head. Detailed implementation manners

[0035] 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.

[0036] As Figures 1 to 10 collectively shown, this embodiment provides a clamping fixture for horizontal machining of a cylinder head, including a base assembly for mounting on a machine tool workbench 28, and a tooling base plate 1 detachably mounted on the base assembly; the tooling base plate 1 is provided with support pins 2 for supporting the cylinder head 29, elastic positioning pins 4 for positioning the cylinder head 29, and a rotary positioning member 7, and a first pressing mechanism for pressing the cylinder head 29. There are several support pins 2, and the elastic positioning pins 4 are installed on the tooling base plate 1 through positioning pin mounting seats 3. The rotary positioning member 7 includes an integrally formed positioning head 701 and a rotating rod 702, and the rotary positioning member 7 is rotatably mounted on the tooling base plate 1. One end of the rotating rod 702 away from the positioning head 701 is connected to a swing rod 8. On both sides of the swing rod 8, there are respectively a hydraulic single-acting cylinder 11 and a return pin 13, and the hydraulic single-acting cylinder 11 and the return pin 13 are arranged along the swinging direction of the swing rod 8.

[0037] For the clamping fixture for horizontal machining of the cylinder head of the present utility model, when positioning and clamping the cylinder head 29, after the tooling base plate 1 is laid flat, first place the intake seat ring hole of the cylinder head 29 opposite to the elastic positioning pin 4, and support the cylinder head 29 through the support pins 2. Then, the hydraulic single-acting cylinder 11 acts, abuts against the swing rod 8 and drives the swing rod 8 to swing. The swing rod 8 drives the rotary positioning member 7 to rotate, so that the rotary positioning member 7 cooperates with the elastic positioning pin 4 to complete the positioning of the cylinder head 29. At the same time, the swing rod 8 compresses the return pin 13. After that, the first pressing mechanism acts to realize the pressing and fixing of the cylinder head 29, thereby completing the positioning and clamping of the cylinder head 29 on the tooling base plate 1. Finally, the tooling base plate 1 with the clamped cylinder head 29 is vertically installed and fixed on the base assembly, and then the top surface of the cylinder head 29 can be machined by a horizontal machine tool. After the machining of the cylinder head 29 is completed, first remove the tooling base together with the cylinder head 29 from the base assembly, and then remove the cylinder head 29 from the tooling base plate 1.

[0038] As Figure 1 、 Figure 3 and Figure 4As shown together, in this embodiment, the locating pin mounting base 3 is fixedly mounted on the tooling base plate 1, the elastic locating pin 4 is mounted on the locating pin mounting base 3, and the top of the elastic locating pin 4 is in a frustum shape. When the cylinder head 29 is placed on the tooling base plate 1, the intake seat ring hole of the cylinder head 29 corresponds to the elastic locating pin 4. As the cylinder head 29 is placed, the elastic locating pin 4 is compressed until the cylinder head 29 abuts against the support pin 2, realizing the pre-positioning placement of the cylinder head 29.

[0039] As Figures 1 to 8 As shown together, to realize the rotational mounting of the rotary positioning member 7, in this embodiment, a positioning member support seat 5 is fixedly mounted on the tooling base plate 1. The positioning member support seat 5 is arranged near the end of the tooling base plate 1. A bushing 6 is mounted on the top of the positioning member support seat 5. The bushing 6 is a flange-integrated oil-free bushing. The rotating rod 702 of the rotary positioning member 7 is rotationally mounted on the positioning member support seat 5 through the bushing 6, thereby realizing the rotational mounting of the rotary positioning member 7.

[0040] As Figures 1 to 9 As shown together, in this embodiment, the top end of the swing rod 8 is fixedly connected to the rotating rod 702. A limit block 9 is fixedly mounted on the tooling base plate 1. The limit block 9 is located directly below the swing rod 8, and the limit block 9 is provided with a limit groove 901. The bottom end of the swing rod 8 extends into the limit groove 901. The provided limit block 9 can realize the swing limit of the swing rod 8, ensuring the stable and reliable swing of the swing rod 8. When the swing rod 8 swings, it drives the rotary positioning member 7 to rotate, thereby realizing the positioning of the cylinder head 29 through the positioning head 701.

[0041] As Figures 1 to 7 As shown together, to realize the installation of the hydraulic single-acting cylinder 11 and the return pin 13, single-acting cylinder mounting seats 10 and return pin mounting seats 12 are respectively fixedly mounted on both sides of the swing rod 8 on the tooling base plate 1. The hydraulic single-acting cylinder 11 is mounted on the side of the single-acting cylinder mounting seat 10 facing the swing rod 8, and the return pin 13 is mounted on the side of the return pin mounting seat 12 facing the swing rod 8. During operation, the hydraulic single-acting cylinder 11 drives the swing rod 8 to act, driving the rotary positioning member 7 to rotate. The rotary positioning member 7 cooperates with the elastic locating pin 4 to realize the positioning of the cylinder head 29. At the same time, the swing rod 8 compresses the return pin 13; after the cylinder head 29 is processed, the hydraulic single-acting cylinder 11 resets. Under the action of the return pin 13, the swing rod 8 resets, thereby realizing the reset of the rotary positioning member 7 and releasing the positioning state of the cylinder head 29.

[0042] As Figures 1 to 5 As shown together, in this embodiment, the support pin 2 is fixedly mounted on the tooling base plate 1. A number of floating support cylinders 14 are also fixedly mounted on the tooling base plate 1. After the rotary positioning member 7 and the elastic locating pin 4 cooperate to complete the positioning of the cylinder head 29, the floating support cylinders 14 act to realize the auxiliary support of the cylinder head 29.

[0043] As Figures 1 to 5 As commonly shown, the first pressing mechanism includes a first lever oil cylinder 15 installed on the tooling base plate 1. There are several first lever oil cylinders 15, and several first lever oil cylinders 15 respectively correspond to the support pins 2 and the floating support cylinders 14. Through the first lever oil cylinder 15, the automatic pressing and fixing of the cylinder head 29 can be realized, which not only makes the clamping of the cylinder head 29 on the tooling base plate 1 firm and reliable, but also makes the clamping and disassembly operations of the cylinder head 29 simple and convenient.

[0044] As Figures 1 to 5 As commonly shown, in this embodiment, a lifting ring screw 16 is installed at one end of the tooling base plate 1. The lifting ring screw 16 facilitates the hoisting and handling of the tooling base plate 1, making the handling and displacement of the tooling base plate 1 convenient and labor-saving.

[0045] As Figure 1 、 Figure 2 and Figure 10 As commonly shown, in this embodiment, the base assembly includes a mounting plate 20, a vertical plate 21 and a reinforcing rib 22. The mounting plate 20 is used for fixed installation on the machine tool workbench 28. The vertical plate 21 is fixedly connected to the mounting plate 20 by welding through the reinforcing rib 22, and the structural strength is high.

[0046] As Figures 1 to 5 、 Figure 10 As commonly shown, to realize the positioning installation and fixing of the tooling base plate 1 on the vertical plate 21, a guide rod 23 and a base plate positioning pin 24 are provided on the vertical plate 21. A guide hole 101 corresponding to the guide rod 23 and a positioning hole 102 corresponding to the base plate positioning pin 24 are opened on the tooling base plate 1. A second pressing mechanism for pressing the tooling base plate 1 is also provided on the vertical plate 21. When the tooling base plate 1 is clamped to the vertical plate 21, the guide hole 101 of the tooling base plate 1 is aligned with the guide rod 23 to realize the guiding installation of the tooling base plate 1, ensuring that the positioning hole 102 of the tooling base plate 1 is aligned with the base plate positioning pin 24. In this way, the positioning installation of the tooling base plate 1 on the vertical plate 21 is realized. Finally, the tooling base plate 1 can be pressed and fixed through the second pressing mechanism, thereby realizing the positioning clamping of the tooling base plate 1 on the vertical plate 21.

[0047] As Figures 1 to 5 、 Figure 10As shown together, in this embodiment, a first pressure-holding valve 17, a first energy accumulator 18, and a sequence valve 19 are further installed on the tooling bottom plate 1, and a second pressure-holding valve 25 and a second energy accumulator 26 are installed on the vertical plate 21. The pressure-holding valve is mainly used to maintain a constant pressure in the hydraulic system, ensuring that the system pressure will not drop due to leakage when the actuator does not operate for a long time, so that the lever cylinder and the like can maintain a stable working state. The energy accumulator can supplement this leakage, thereby maintaining a constant pressure. In addition, the pressure-holding valve can also serve as an emergency power source in the event of a pump failure or power outage, etc., to ensure that the actuator can continue to complete necessary actions, such as the safety action of the piston rod of the hydraulic cylinder retracting into the cylinder. The energy accumulator, also known as an accumulator, its main functions include serving as an auxiliary power source, system pressure holding or serving as an emergency power source, absorbing system pulsations, and mitigating hydraulic shocks. In a hydraulic system with intermittent operation or a periodic action cycle, the energy accumulator can store the excess pressure oil output by the hydraulic pump and release it when the system needs it, reducing the rated flow of the hydraulic pump, reducing the motor power consumption and the temperature rise of the hydraulic system. In addition, the energy accumulator can also absorb the shock caused by sudden changes in the system pressure, such as the hydraulic shock caused by the sudden start or stop of the hydraulic pump, and absorb the pressure pulsations caused by the flow pulsations during the operation of the hydraulic pump, reducing noise. Thus, through the joint cooperation of the pressure-holding valve and the energy accumulator in the hydraulic system, the stable operation and safety of the system are ensured. The pressure-holding valve is mainly responsible for maintaining the system pressure and providing power in an emergency, while the energy accumulator assists the system operation by storing and releasing energy, absorbing shocks and pulsations, reducing noise, etc. The two complement each other in the hydraulic system to jointly ensure the normal operation of the system. The sequence valve 19 is a valve that controls the action sequence of the actuator according to the pressure of the circuit, etc., so that the hydraulic single-acting cylinder 11, the lever cylinder and other actuators can accurately achieve the sequence action.

[0048] As Figure 1 , Figure 2 and Figure 10 As shown together, the second pressing mechanism includes a second lever cylinder 27 installed on the vertical plate 21. There are several second lever cylinders 27, and several second lever cylinders 27 are arranged around the tooling bottom plate 1. Through the second lever cylinder 27, the automatic pressing and fixing of the tooling bottom plate 1 can be realized, which not only makes the clamping of the tooling bottom plate 1 on the vertical plate 21 firm and reliable, but also makes the clamping and disassembly operations of the tooling bottom plate 1 simple and convenient.

[0049] Before machining the top surface of the cylinder head 29 to be processed, first place the tooling base plate 1 flat, then place the intake seat ring hole of the cylinder head 29 facing the elastic positioning pin 4, and support the cylinder head 29 through the supporting pin 2. After that, the hydraulic single-acting cylinder 11 works, driving the swing rod 8 to swing and compressing the return pin 13. The swing of the swing rod 8 drives the rotating positioning member 7 to rotate. Through the cooperation of the positioning head 701 of the rotating positioning member 7 and the elastic positioning pin 4, the positioning of the cylinder head 29 is completed. Then, the floating support cylinder 14 acts to achieve the auxiliary support of the cylinder head 29. Finally, the first lever oil cylinder 15 works to achieve the pressing and fixing of the cylinder head 29. In this way, the positioning and clamping of the cylinder head 29 on the tooling base plate 1 are completed. Then, lift the tooling base plate 1 with the clamped cylinder head 29 to the base assembly, so that the guide hole 101 of the tooling base plate 1 faces the guide rod 23, and the positioning hole 102 of the tooling base plate 1 faces the base plate positioning pin 24, realizing the positioning and installation of the tooling base plate 1 on the vertical plate 21. Finally, the second lever oil cylinder 27 works to achieve the pressing and fixing of the tooling base plate 1. In this way, the positioning and clamping of the tooling base plate 1 on the vertical plate 21 are completed, and the top surface machining of the cylinder head 29 on the horizontal machine tool can be realized.

[0050] After the machining of the cylinder head 29 is completed, the second lever oil cylinder 27 works to release the pressing state of the tooling base plate 1, and then the tooling base plate 1 can be removed from the vertical plate 21 and lifted and placed flat outside the horizontal machine tool. After that, the first lever oil cylinder 15 works to release the pressing state of the cylinder head 29. At the same time, the hydraulic single-acting cylinder 11 resets. Under the action of the return pin 13, the swing rod 8 resets, automatically releasing the positioning state of the rotating positioning member 7 on the cylinder head 29, and the machined cylinder head 29 can be removed from the tooling base plate 1.

[0051] For the clamping tooling for horizontal machining of the cylinder head based on the above structure, first clamp the cylinder head 29 onto the flat tooling base plate 1, and then vertically clamp the tooling base plate 1 with the clamped cylinder head 29 onto the base assembly, making the clamping and disassembling operations of the cylinder head 29 simple and convenient. It can not only achieve the accurate positioning and clamping of the cylinder head 29, but also the clamping is firm and reliable. After the cylinder head 29 is clamped on this clamping tooling, the top surface machining of the cylinder head 29 can be realized on the horizontal machine tool, thus greatly improving the machining efficiency and machining quality of the cylinder head 29.

[0052] It should be understood that the use of these embodiments is only for explaining 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 horizontal machining of a cylinder head, characterized in that: It includes a base assembly for mounting on a machine tool workbench, and a tooling base plate is detachably mounted on the base assembly; The tooling base plate is provided with support pins for supporting the cylinder head, elastic positioning pins and rotary positioning members for positioning the cylinder head, and a first pressing mechanism for pressing the cylinder head. There are several support pins. The elastic positioning pins are mounted on the tooling base plate through positioning pin mounting seats. The rotary positioning member includes an integrally formed positioning head and a rotating rod, and the rotary positioning member is rotatably mounted on the tooling base plate. One end of the rotating rod away from the positioning head is connected with a swing rod. Hydraulic single-acting cylinders and return pins are respectively arranged on both sides of the swing rod, and the hydraulic single-acting cylinders and the return pins are arranged along the swinging direction of the swing rod.

2. The clamping fixture for horizontal machining of the cylinder head according to claim 1, wherein: The positioning pin mounting seat is fixedly mounted on the tooling base plate, the elastic positioning pin is mounted on the positioning pin mounting seat, and the top of the elastic positioning pin is a frustum-shaped structure.

3. The clamping tooling for horizontal machining of the cylinder head according to claim 1, wherein: A positioning member support seat is fixedly mounted on the tooling base plate, a bushing is mounted on the top of the positioning member support seat, and the rotating rod of the rotary positioning member is rotatably mounted on the positioning member support seat through the bushing.

4. The clamping tooling for horizontal machining of the cylinder head according to claim 3, wherein: The top end of the swing rod is fixedly connected with the rotating rod. A limit block is fixedly mounted on the tooling base plate. The limit block is located directly below the swing rod, and a limit groove is formed in the limit block. The bottom end of the swing rod extends into the limit groove.

5. The clamping fixture for horizontal machining of the cylinder head according to claim 4, characterized in that: Single-acting cylinder mounting seats and return pin mounting seats are respectively fixedly mounted on both sides of the swing rod on the tooling base plate. The hydraulic single-acting cylinder is mounted on one side of the single-acting cylinder mounting seat facing the swing rod, and the return pin is mounted on one side of the return pin mounting seat facing the swing rod.

6. The clamping fixture for horizontal machining of the cylinder head according to claim 1, characterized in that: The support pins are fixedly mounted on the tooling base plate, and several floating support cylinders are also fixedly mounted on the tooling base plate; The first pressing mechanism includes first lever cylinders mounted on the tooling base plate. There are several first lever cylinders, and several first lever cylinders correspond to the support pins and the floating support cylinders respectively.

7. The clamping fixture for horizontal machining of the cylinder head according to claim 1, characterized in that: A lifting eye screw is mounted at one end of the tooling base plate.

8. The clamping tooling for horizontal machining of the cylinder head according to any one of claims 1-7, characterized in that: The base assembly includes a mounting plate, a vertical plate and a reinforcing rib. The vertical plate is fixedly connected with the mounting plate through the reinforcing rib; The vertical plate is provided with a guide rod and a base plate positioning pin. The tooling base plate is provided with a guide hole corresponding to the guide rod and a positioning hole corresponding to the base plate positioning pin. The vertical plate is also provided with a second pressing mechanism for pressing the tooling base plate.

9. The clamping tooling for horizontal machining of the cylinder head according to claim 8, wherein: A first pressure maintaining valve, a first energy accumulator and a sequence valve are also mounted on the tooling base plate, and a second pressure maintaining valve and a second energy accumulator are mounted on the vertical plate.

10. The clamping tooling for horizontal machining of the cylinder head according to claim 8, wherein: The second pressing mechanism includes second lever cylinders mounted on the vertical plate. There are several second lever cylinders, and several second lever cylinders surround the tooling base plate.

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