Engine cylinder head intake manifold machining fixture

Abstract

The application discloses an engine cylinder cover intake manifold machining clamp, which comprises a bottom plate, a first pressing mechanism, a second pressing mechanism, a vertical plate arranged on the bottom plate, a first positioning mechanism and a second positioning mechanism arranged on the vertical plate, a third pressing mechanism arranged on the vertical plate and used for applying pressure to an intake manifold blank, and an auxiliary supporting mechanism arranged on the bottom plate, wherein the third pressing mechanism is located between the first pressing mechanism and the second pressing mechanism, and the auxiliary supporting mechanism is located below the third pressing mechanism. The engine cylinder cover intake manifold machining clamp can realize clamping and fixing of the intake manifold blank through cooperation of the auxiliary supporting mechanism, the positioning mechanism and the three pressing mechanisms, can improve clamping stability of the engine intake manifold blank, and can prevent the intake manifold blank from shaking during machining, so that machining quality of the engine intake manifold can be improved.

Description

Technical Field

[0001] This invention belongs to the field of fixture technology. Specifically, this invention relates to a machining fixture for engine cylinder head intake manifolds. Background Technology

[0002] The engine cylinder head intake manifold refers to the intake pipe between the engine throttle body and the cylinder head intake passage. The engine cylinder head intake manifold is used to distribute the air-fuel mixture from the throttle body to the intake passages of each cylinder.

[0003] During the machining of the engine cylinder head intake manifold, a fixture is needed to hold and fix the intake manifold. Existing fixtures have multiple clamping cylinders and flat support pins that work together to clamp the intake manifold blank, and two locating pins to position the intake manifold. The engine intake manifold itself has a complex shape. If the surface machining accuracy of the intake manifold blank is not up to standard, the flat support pins on the fixture cannot contact the surface of the intake manifold blank, failing to provide stable support. This results in instability after clamping, ultimately affecting the machining quality of the engine intake manifold.

[0004] For example, patent document CN204711627U discloses a fixture for drilling and milling the end face of an engine intake manifold, including a base plate and a positioning mechanism, a first clamping mechanism, a positioning block, and a second clamping mechanism disposed on the base plate; the first clamping mechanism includes a first hydraulic cylinder, a first pressure rod connected to the piston rod of the first hydraulic cylinder, and a first pressure block disposed at the clamping end of the first pressure rod; the second clamping mechanism includes a second hydraulic cylinder, a second pressure rod connected to the piston rod of the second hydraulic cylinder, and a second pressure block disposed at the clamping end of the second pressure rod. The technical solution disclosed in this patent document also fails to solve the aforementioned technical problems. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a machining fixture for engine cylinder head intake manifolds, with the purpose of improving the clamping stability of engine intake manifold blanks.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an engine cylinder head intake manifold machining fixture, comprising a base plate, a first clamping mechanism, a second clamping mechanism, a vertical plate disposed on the base plate, a first positioning mechanism and a second positioning mechanism disposed on the vertical plate, a third clamping mechanism disposed on the vertical plate and used to apply pressure to the intake manifold blank, and an auxiliary support mechanism disposed on the base plate, wherein the third clamping mechanism is located between the first clamping mechanism and the second clamping mechanism, and the auxiliary support mechanism is located below the third clamping mechanism.

[0007] The first clamping mechanism includes a first support disposed on the vertical plate and a first lever cylinder disposed on the first support.

[0008] The second clamping mechanism includes a second support disposed on the vertical plate and a second lever cylinder disposed on the second support.

[0009] The third pressing mechanism includes a third support mounted on the vertical plate, a movable pressure plate mounted on the third support, a pressing rod mounted on the pressure plate for applying pressure to the intake manifold blank, and a first operating rod mounted on the third support for driving the pressure plate to move linearly.

[0010] The first operating lever is threadedly connected to the third support, and the first operating lever is rotatably connected to the pressure plate.

[0011] Two clamping rods are provided.

[0012] The auxiliary support mechanism includes a support base mounted on the base plate, a support pin movably mounted on the support base for providing support for the intake manifold blank, a first spring mounted inside the support base for applying an elastic force to the support pin, a top pin movably mounted on the support base for applying pressure to the support pin, and a second operating lever mounted on the support base for pushing the top pin to move linearly.

[0013] The second operating lever is threadedly connected to the support base.

[0014] The top surface of the support pin is in contact with the surface of the intake manifold blank, and the top surface of the support pin is spherical.

[0015] The first positioning mechanism includes a first positioning seat disposed on the vertical plate and a first vertical positioning pin, a first horizontal positioning pin, and a first stop rod disposed on the first positioning seat. The second positioning mechanism includes a second positioning seat disposed on the vertical plate and a second vertical positioning pin, a second horizontal positioning pin, and a second stop rod disposed on the second positioning seat. The distance between the second stop rod and the first stop rod is adjustable, and the second stop rod is connected to a third operating lever.

[0016] The engine cylinder head intake manifold machining fixture of the present invention, through the cooperation of an auxiliary support mechanism, a positioning mechanism and three clamping mechanisms, achieves the clamping and fixing of the intake manifold blank, which can improve the clamping stability of the engine intake manifold blank, and the intake manifold blank is not easy to shake during the machining process, which can help improve the machining quality of the engine intake manifold. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1This is a front view of the engine cylinder head intake manifold machining fixture of the present invention;

[0019] Figure 2 This is a top view of the engine cylinder head intake manifold machining fixture of the present invention;

[0020] Figure 3 This is a left view of the engine cylinder head intake manifold machining fixture of the present invention;

[0021] Figure 4 This is a right view of the engine cylinder head intake manifold machining fixture of the present invention;

[0022] Figure 5 This is a structural diagram of the auxiliary support mechanism;

[0023] The components in the diagram are labeled as follows: 1. Base plate; 2. Vertical plate; 3. Reinforcing plate; 4. First lever cylinder; 401. Pressure rod; 5. Second lever cylinder; 501. Pressure rod; 6. Third support; 7. First operating lever; 8. Pressure plate; 9. Pressing rod; 10. Support seat; 11. Support pin; 12. First spring; 13. Top pin; 14. Second operating lever; 15. Second spring; 16. First vertical positioning pin; 17. First horizontal positioning pin; 18. First stop rod; 19. Second vertical positioning pin; 20. Second horizontal positioning pin; 21. Second stop rod; 22. Third operating lever; 23. First positioning seat; 24. Second positioning seat; 25. Intake manifold blank. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation.

[0025] It should be noted that in the following embodiments, the terms "first," "second," and "third" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution; they are merely for the convenience of description.

[0026] like Figures 1 to 5 As shown, the present invention provides a machining fixture for an engine cylinder head intake manifold, including a base plate 1, a first clamping mechanism, a second clamping mechanism, a vertical plate 2 disposed on the base plate 1, a first positioning mechanism and a second positioning mechanism disposed on the vertical plate 2, a third clamping mechanism disposed on the vertical plate 2 for applying pressure to the intake manifold blank, and an auxiliary support mechanism disposed on the base plate 1. The third clamping mechanism is located between the first clamping mechanism and the second clamping mechanism, and the auxiliary support mechanism is located below the third clamping mechanism.

[0027] Specifically, such as Figures 1 to 4As shown, the base plate 1 is horizontally positioned and is rectangular. The length of the base plate 1 is parallel to a first direction, and the width of the base plate 1 is parallel to a second direction. Both the first and second directions are horizontal and perpendicular to each other. A vertical plate 2 is vertically positioned on the base plate 1, with its lower end fixedly connected to the base plate 1. The length of the vertical plate 2 is parallel to the first direction. The first, second, and third pressing mechanisms are located on the same straight line parallel to the first direction. The first and second pressing mechanisms apply pressure to both ends of the intake manifold blank along its length, respectively. The third pressing mechanism is located in the middle of the first and second pressing mechanisms and applies pressure to the intake manifold blank at its middle position along its length. An auxiliary support mechanism provides support for the intake manifold blank.

[0028] like Figures 1 to 4 As shown, the first pressing mechanism includes a first support mounted on the vertical plate 2 and a first lever cylinder 4 mounted on the first support. The first support is fixedly mounted on the vertical plate 2, and the first lever cylinder 4 is used to apply pressure to the cylinder head of the cylinder head in a second direction. The second pressing mechanism includes a second support mounted on the vertical plate 2 and a second lever cylinder 5 mounted on the second support. The second support is fixedly mounted on the vertical plate 2, and the second lever cylinder 5 is used to apply pressure to the cylinder head of the cylinder head in a second direction. The first lever cylinder 4 and the second lever cylinder 5 are lever cylinders, and their structures are as known to those skilled in the art, and will not be described in detail here. The pressure rod 401 of the first lever cylinder 4 and the pressure rod 501 of the second lever cylinder 5 are respectively in contact with the two ends in the length direction of the intake manifold blank.

[0029] like Figures 1 to 4 As shown, the third clamping mechanism includes a third support 6 mounted on the vertical plate 2, a movable pressure plate 8 mounted on the third support 6, a clamping rod 9 mounted on the pressure plate 8 for applying pressure to the intake manifold blank, and a first operating rod 7 mounted on the third support 6 for driving the pressure plate 8 to move linearly. The third support 6 is fixedly mounted on the vertical plate 2, located between the first support and the second support. The pressure plate 8 is slidably connected to the third support 6, and the third support 6 guides the pressure plate 8, allowing the pressure plate 8 to move vertically. The clamping rod 9 is vertically mounted and fixedly mounted on the pressure plate 8. Multiple clamping rods 9 are provided, and all clamping rods 9 are arranged sequentially along the length direction of the pressure plate 8, which is parallel to the first direction.

[0030] like Figures 1 to 4As shown, the first operating lever 7 and the third support 6 are threadedly connected. The first operating lever 7 is vertically positioned, and its lower end is rotatably connected to the upper end of the pressure plate 8. The clamping rod 9 is located at the lower end of the pressure plate 8. The third support 6 has a threaded hole, and the outer surface of the first operating lever 7 has an external thread. By rotating the first operating lever 7, the operator can move the first operating lever 7 up and down on the third support 6. Simultaneously, the first operating lever 7 drives the pressure plate 8 and its clamping rod 9 to move synchronously, allowing the clamping rod 9 to contact and separate from the intake manifold blank. When the clamping rod 9 contacts the intake manifold blank, pressure can be applied to it.

[0031] like Figure 1 As shown, in this embodiment, two clamping rods 9 are provided, and there is a certain distance between the two clamping rods 9. The two clamping rods 9 can apply pressure to the intake manifold blank at two positions.

[0032] like Figures 1 to 5 As shown, the auxiliary support mechanism includes a support base 10 mounted on the base plate 1, a support pin 11 movably mounted on the support base 10 for providing support for the intake manifold blank, a first spring 12 mounted inside the support base 10 for applying an elastic force to the support pin 11, a top pin 13 movably mounted on the support base 10 for applying pressure to the support pin 11, and a second operating lever 14 mounted on the support base 10 for pushing the top pin 13 to move linearly. The support base 10 is fixedly mounted on the base plate 1. The support pin 11 is vertically positioned and can move linearly in the vertical direction. The lower end of the support pin 11 is inserted into a receiving hole provided on the support base 10. The first spring 12 is also located in this receiving hole. The first spring 12 is a cylindrical helical spring and a compression spring (the elastic force generated by the first spring 12 can push the support pin 11, but cannot push the intake manifold blank). The first spring 12 applies an upward elastic force to the support pin 11 and is sandwiched between the support pin 11 and the inner bottom surface of the receiving hole. The top pin 13 is movably mounted in a guide hole provided in the support base 10. The axis of the top pin 13 is parallel to the second direction. The guide hole communicates with the receiving hole. The top pin 13 is located between the support pin 11 and the second operating lever 14. The second operating lever 14 is used to push the top pin 13 toward the position of the support pin 11. A second spring 15 is fitted on the top pin 13. The second spring 15 is a cylindrical helical spring and a compression spring. The second spring 15 is sandwiched between the limiting surface provided in the guide hole and the stepped surface provided on the top pin 13. The second spring 15 is used to apply an elastic force to the top pin 13 to move it away from the support nail 11, so as to realize the automatic reset of the top pin 13.

[0033] like Figure 5As shown, preferably, the second operating rod 14 is threadedly connected to the support base 10. The support base 10 has a threaded hole coaxial with the guide hole, and the second operating rod 14 has an external thread. By rotating the second operating rod 14, when the second operating rod 14 moves toward a position close to the support pin 11, the second operating rod 14 can push the top pin 13 to move linearly toward the support pin 11. The second operating rod 14 applies pressure to the top pin 13, the second spring 15 is compressed, and finally the top pin 13 abuts against the support pin 11, keeping the support pin 11 in a supported state, and the support pin 11 cannot move in the vertical direction. When the second operating rod 14 moves toward a position away from the support pin 11, the second operating rod 14 cannot apply pressure to the top pin 13, the second spring 15 extends, pushing the top pin 13 to move away from the support pin 11. After the top pin 13 separates from the support pin 11, the support pin 11 can move in the vertical direction.

[0034] like Figure 5 As shown, preferably, the top surface of the support pin 11 is in contact with the surface of the intake manifold blank. The support pin 11 provides support to the pressure regulator below the middle position of the pressure regulator in the length direction of the intake manifold blank. The top surface of the support pin 11 is spherical, which provides good positioning effect. A groove is provided on the outer circumference of the support pin 11 for the end of the top pin 13 to be inserted. This groove extends along the length direction of the support pin 11.

[0035] like Figure 1 and Figure 5 As shown, after the intake manifold blank is placed, the first spring 12 pushes the support pin 11 upward to contact the intake manifold blank. Then, the second operating lever 14 is rotated, and the second operating lever 14 pushes the top pin 13 to move linearly toward the support pin 11. The top pin 13 is inserted into the groove of the support pin 11. After the top pin 13 moves into place, it abuts against the support pin 11, applying radial pressure to the support pin 11, thus fixing the support pin 11 in place. The first spring 12 remains compressed, and the support pin 11 is firmly locked and not easily loosened, providing stable support. This auxiliary support mechanism uses the elasticity of the spring to provide floating support. Under the action of the elastic force generated by the first spring 12, the support pin 11 contacts the surface of the intake manifold blank, providing good support effect and uniform force, which can improve the stability of the intake manifold blank clamping.

[0036] like Figures 1 to 4As shown, the first positioning mechanism is located above the first lever cylinder 4. The first positioning mechanism includes a first positioning seat 23 disposed on the vertical plate 2, and a first vertical positioning pin 16, a first horizontal positioning pin 17, and a first stop bar 18 disposed on the first positioning seat 23. The first positioning seat 23 is fixedly disposed at the upper end of the vertical plate 2. The first vertical positioning pin 16 is vertically disposed on the first positioning seat 23, and the first horizontal positioning pin 17 is horizontally disposed on the first positioning seat 23. The axis of the first horizontal positioning pin 17 is parallel to the second direction. The first horizontal positioning pin 17 is located below the first vertical positioning pin 16. The first vertical positioning pin 16 is in contact with the first surface of the intake manifold blank. The first horizontal positioning pin 17 is used to insert into a positioning hole on the second surface of the intake manifold blank. The first stop bar 18 is vertically disposed on the first positioning seat 23 and is used to limit the intake manifold blank in the first direction.

[0037] like Figures 1 to 4 As shown, the second positioning mechanism is located above the second lever cylinder 5. The second positioning mechanism includes a second positioning seat 24 mounted on the vertical plate 2, and a second vertical positioning pin 19, a second horizontal positioning pin 20, and a second stop bar 21 mounted on the second positioning seat 24. The second positioning seat 24 is fixedly mounted on the upper end of the vertical plate 2. The second vertical positioning pin 19 is vertically mounted on the second positioning seat 24, and the second horizontal positioning pin 20 is horizontally mounted on the second positioning seat 24. The axis of the second horizontal positioning pin 20 is parallel to the second direction, and the second horizontal positioning pin 20 is located below the second vertical positioning pin 19. The second vertical positioning pin 19 contacts the first surface of the intake manifold blank, and the second horizontal positioning pin 20 is used to insert into another positioning hole on the second surface of the intake manifold blank. The first horizontal positioning pin 17 and the second horizontal positioning pin 20 are on the same straight line parallel to the first direction, and the first vertical positioning pin 16 and the second vertical positioning pin 19 are also on the same straight line parallel to the first direction.

[0038] like Figures 1 to 4As shown, the second positioning mechanism also includes a third operating lever 22. The second stop lever 21 is connected to the third operating lever 22. The length direction of the second stop lever 21 is parallel to the first direction. The second stop lever 21 is threadedly connected to the second positioning seat 24. An external thread is provided on the outer circular surface of the second stop lever 21. A threaded hole is provided on the second positioning seat 24. One end of the third operating lever 22 is fixedly connected to one end of the second stop lever 21. The third operating lever 22 is used for the operator to hold and drive the second stop lever 21 to rotate, thereby allowing the second stop lever 21 to move linearly along the first direction, so that the second stop lever 21 contacts or separates from the end face of the intake manifold blank. After the first stop lever 18 and the second stop lever 21 respectively contact the two end faces of the intake manifold blank in the length direction, they can limit the intake manifold blank in the first direction. With the help of four positioning pins, the intake manifold blank can be accurately positioned. The intake manifold blank is not easy to shake during the processing, which helps to improve the processing quality.

[0039] like Figures 1 to 4 As shown, the engine cylinder head intake manifold machining fixture of the present invention also includes a reinforcing plate 3 fixedly connected to the base plate 1 and the vertical plate 2. Two reinforcing plates 3 are provided, and the vertical plate 2 is located between the two reinforcing plates 3. The lower end of the reinforcing plate 3 is fixedly connected to the base plate. The provision of the reinforcing plate 3 can improve the connection strength between the base plate 1 and the vertical plate 2 and improve reliability.

[0040] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An engine cylinder head intake manifold machining fixture, comprising a base plate, a first clamping mechanism, and a second clamping mechanism, characterized in that: It also includes a vertical plate disposed on the base plate, a first positioning mechanism and a second positioning mechanism disposed on the vertical plate, a third pressing mechanism disposed on the vertical plate and used to apply pressure to the intake manifold blank, and an auxiliary support mechanism disposed on the base plate. The third pressing mechanism is located between the first pressing mechanism and the second pressing mechanism, and the auxiliary support mechanism is located below the third pressing mechanism. The base plate is horizontally set and is rectangular. The length direction of the base plate is parallel to the first direction, and the width direction is parallel to the second direction. Both the first and second directions are horizontal and perpendicular to each other. The vertical plate is vertically set on the base plate, and its lower end is fixedly connected to the base plate. The length direction of the vertical plate is parallel to the first direction. The first, second, and third pressing mechanisms are on the same straight line parallel to the first direction. The first and second pressing mechanisms are used to apply pressure to both ends of the intake manifold blank in the length direction, respectively. The third pressing mechanism is located in the middle of the first and second pressing mechanisms and is used to apply pressure to the intake manifold blank at the middle position in the length direction. The auxiliary support mechanism provides support for the intake manifold blank. The first pressing mechanism includes a first support disposed on a vertical plate and a first lever cylinder disposed on the first support. The first support is fixedly disposed on the vertical plate, and the first lever cylinder is used to apply pressure to the cylinder head of the cylinder head in a second direction. The second pressing mechanism includes a second support disposed on a vertical plate and a second lever cylinder disposed on the second support. The second support is fixedly disposed on the vertical plate, and the second lever cylinder is used to apply pressure to the cylinder head of the cylinder head in a second direction. The third clamping mechanism includes a third support mounted on a vertical plate, a movable pressure plate mounted on the third support, a clamping rod mounted on the pressure plate for applying pressure to the intake manifold blank, and a first operating rod mounted on the third support for driving the pressure plate to move linearly. The third support is fixedly mounted on the vertical plate and is located between the first and second supports. The pressure plate and the third support are slidably connected. The third support guides the pressure plate, which can move vertically. The clamping rod is vertically mounted and fixedly mounted on the pressure plate. Multiple clamping rods are provided and all clamping rods are arranged sequentially along the length of the pressure plate. The length of the pressure plate is parallel to the first direction. The first operating lever and the third support are threaded together. The first operating lever is vertically positioned, and its lower end is rotatably connected to the upper end of the pressure plate. The clamping rod is located at the lower end of the pressure plate. The third support has a threaded hole, and the outer surface of the first operating lever has an external thread. By rotating the first operating lever, the operator can move the first operating lever up and down on the third support. At the same time, the first operating lever drives the pressure plate and the clamping rod on it to move synchronously, allowing the clamping rod to contact and separate from the intake manifold blank. When the clamping rod contacts the intake manifold blank, it can apply pressure to the intake manifold blank. The auxiliary support mechanism includes a support base mounted on the base plate, a support pin movably mounted on the support base for providing support for the intake manifold blank, a first spring mounted inside the support base for applying an elastic force to the support pin, a top pin movably mounted on the support base for applying pressure to the support pin, and a second operating lever mounted on the support base for pushing the top pin to move linearly. The support base is fixedly mounted on the base plate. The support pin is vertically mounted and can move linearly in the vertical direction. The lower end of the support pin is inserted into the receiving hole provided on the support base. The first spring is also located in the receiving hole. The first spring is a cylindrical helical spring and is a compression spring. The first spring applies an upward elastic force to the support pin. The first spring is sandwiched between the support pin and the inner bottom surface of the receiving hole. The top pin is movably set in the guide hole provided in the support base. The axis of the top pin is parallel to the second direction. The guide hole is connected to the receiving hole. The top pin is located between the support pin and the second operating rod. The second operating rod is used to push the top pin to move toward the position of the support pin. A second spring is fitted on the top pin. The second spring is a cylindrical helical spring and a compression spring. The second spring is sandwiched between the limiting surface set in the guide hole and the stepped surface set on the top pin. The second spring is used to apply an elastic force to the top pin so that it moves away from the support pin, thereby realizing the automatic reset of the top pin. The second operating rod is threadedly connected to the support base. The support base has a threaded hole that is coaxial with the guide hole. The second operating rod has an external thread. By rotating the second operating rod, when the second operating rod moves toward a position close to the support pin, the second operating rod can push the top pin to move linearly toward the support pin. The second operating rod applies pressure to the top pin, and the second spring is compressed, ultimately causing the top pin to abut against the support pin, keeping the support pin in a supported state. The support pin cannot move in the vertical direction. When the second operating lever moves away from the support pin, the second operating lever cannot apply pressure to the top pin. The second spring extends and pushes the top pin away from the support pin. After the top pin separates from the support pin, the support pin can move in the vertical direction. The top surface of the support pin is in contact with the surface of the intake manifold blank. The support pin provides support to the pressure tank below the middle position of the pressure tank in the length direction of the intake manifold blank. The top surface of the support pin is spherical. A groove is provided on the outer circular surface of the support pin to allow the end of the top pin to be inserted. The groove extends along the length direction of the support pin. After the intake manifold blank is placed, the first spring pushes the support pin upward to contact the intake manifold blank. Then, the second operating lever is rotated, and the second operating lever pushes the top pin to move linearly toward the support pin. The top pin is inserted into the slide groove of the support pin. After the top pin moves into place, it abuts against the support pin and applies radial pressure to the support pin, thus fixing the support pin in place. The first spring remains compressed, and the support pin is locked firmly and not easy to loosen, providing stable support. The first positioning mechanism is located above the first lever cylinder. The first positioning mechanism includes a first positioning seat disposed on a vertical plate and a first vertical positioning pin, a first horizontal positioning pin, and a first stop rod disposed on the first positioning seat. The first positioning seat is fixedly disposed at the upper end of the vertical plate. The first vertical positioning pin is vertically disposed on the first positioning seat. The first horizontal positioning pin is horizontally disposed on the first positioning seat. The axis of the first horizontal positioning pin is parallel to the second direction. The first horizontal positioning pin is located below the first vertical positioning pin. The first vertical positioning pin is in contact with the first surface of the intake manifold blank. The first horizontal positioning pin is used to insert into a positioning hole on the second surface of the intake manifold blank. The first stop rod is vertically disposed on the first positioning seat. The first stop rod is used to limit the intake manifold blank in the first direction. The second positioning mechanism is located above the second lever cylinder. The second positioning mechanism includes a second positioning seat mounted on a vertical plate, and a second vertical positioning pin, a second horizontal positioning pin, and a second stop rod mounted on the second positioning seat. The second positioning seat is fixedly mounted on the upper end of the vertical plate. The second vertical positioning pin is vertically mounted on the second positioning seat, and the second horizontal positioning pin is horizontally mounted on the second positioning seat. The axis of the second horizontal positioning pin is parallel to the second direction, and the second horizontal positioning pin is located below the second vertical positioning pin. The second vertical positioning pin contacts the first surface of the intake manifold blank, and the second horizontal positioning pin is used to insert into another positioning hole on the second surface of the intake manifold blank. The first horizontal positioning pin and the second horizontal positioning pin are on the same straight line parallel to the first direction, and the first vertical positioning pin and the second vertical positioning pin are also on the same straight line parallel to the first direction. The second positioning mechanism also includes a third operating lever. The second stop lever is connected to the third operating lever. The length direction of the second stop lever is parallel to the first direction. The second stop lever is threadedly connected to the second positioning seat. An external thread is provided on the outer circular surface of the second stop lever. A threaded hole is provided on the second positioning seat. One end of the third operating lever is fixedly connected to one end of the second stop lever. The third operating lever is used for the operator to hold and drive the second stop lever to rotate, thereby enabling the second stop lever to move linearly along the first direction, so that the second stop lever contacts or separates from the end face of the intake manifold blank. After the first stop lever and the second stop lever respectively contact the two end faces of the intake manifold blank in the length direction, they can limit the intake manifold blank in the first direction. With the help of four positioning pins, the intake manifold blank can be positioned.

2. The engine cylinder head intake manifold machining fixture according to claim 1, characterized in that: Two clamping rods are provided.

Images