An EGR valve body machining fixture

Abstract

The application belongs to the technical field of EGR valve body clamps, in particular to an EGR valve body machining clamp, which comprises a workbench, the top surface of the workbench is provided with a pair of first fixing members, the vertical surface of the first fixing member is engaged with an upper tightening screw, the end of the upper tightening screw is movably provided with a connecting frame, the end of the connecting frame away from the upper tightening screw is fixedly connected with a clamping plate, and the vertical surface of the clamping plate is uniformly provided with fixed rods; the EGR valve body machining clamp is provided with multiple fixed rods on the clamping plate, when in use, the clamping plate moves close to the surface of the valve body, the fixed rods on the clamping plate extrude the surface of the valve body, the multiple fixed rods extrude and fix the irregular surface of the valve body, the clamping area of the clamp on the valve body is increased, the clamping effect can be ensured without excessively increasing the clamping force, the surface of the valve body is prevented from being excessively extruded and deformed and damaged, and the stability during the EGR valve machining can be ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of EGR valve body clamps, in particular to an EGR valve body machining clamp. BACKGROUND

[0002] The EGR valve is also called the exhaust gas recirculation valve, which is a mechatronic product installed on the diesel engine to control the exhaust gas recirculation amount of the intake system, and is a very important and key component in the exhaust gas recirculation device; its function is to control the amount of exhaust gas entering the intake manifold, so that a certain amount of exhaust gas flows into the intake manifold for recirculation; currently, the surface of the valve body needs to be treated during EGR valve production, including cutting, punching, grinding and other processes, and when the surface of the valve body is treated, the valve body needs to be clamped and fixed by a clamp.

[0003] The surface of the EGR valve body is irregularly shaped, and the existing clamp has limited contact area between the clamping plate and the valve body when clamping and fixing the EGR valve body; in order to ensure the clamping effect of the valve body, the clamping force of the clamping plate on the valve body needs to be appropriately increased, which is easy to cause the valve body to be excessively squeezed and deformed and damaged, and when the clamping force is reduced, the clamping effect of the clamping plate on the valve body is also reduced, which cannot guarantee the stability of the EGR valve machining.

[0004] Therefore, the application provides an EGR valve body machining clamp. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: An EGR valve body machining fixture of this invention includes a worktable. A pair of first fixing members are mounted on the top surface of the worktable. A tightening screw is engaged with the vertical surface of each of the first fixing members. A connecting frame is movably mounted on the end of the tightening screw. A clamping plate is fixedly connected to the end of the connecting frame away from the tightening screw. Fixed rods are evenly arrayed and inserted into the vertical surface of the clamping plate. A compression spring is provided at the end of each fixed rod near the first fixing member. A baffle is provided at the end of the compression spring away from the fixed rod. A linkage frame is provided between the baffle and the clamping plate. In this embodiment of the invention… In use, the EGR valve body to be processed is placed in the center of the worktable, and then the tightening screw is turned. When the tightening screw engages with the threaded hole on the first fixing part, it drives the clamping plate to move through the connecting frame. When the clamping plate moves close to the surface of the valve body, the fixing rod on the clamping plate presses against the surface of the valve body. Then the fixing rod moves relative to the clamping plate, and the compression spring between the fixing rod and the baffle is compressed. Multiple fixing rods press and fix the irregular surface of the valve body, increasing the clamping and fixing area of ​​the fixture on the valve body. The clamping effect can be guaranteed without excessively increasing the clamping force, avoiding excessive compression deformation and damage to the surface of the valve body, and ensuring the stability of EGR valve processing.

[0007] Preferably, a pair of movable plates are slidably connected to the top surface of the workbench, the ends of the movable plates are connected to the output ends of the hydraulic components, and a second fixing component is installed on the top surface of the movable plates. In use, the second fixing component is installed on the top of the movable plates, and the relevant structure for clamping the valve body is installed on the second fixing component. Then, the position of the movable plates is adjusted by the hydraulic components. The clamping structure on the second fixing component can also assist in clamping the surface of the valve body, further improving the overall clamping stability of the valve body.

[0008] Preferably, the top surface of the movable plate has multiple uniformly formed arc-shaped mounting slots, and a connector is installed inside the mounting slot. The connector is connected to the second fixing member by a thread. In use, the position of the second fixing member can be adjusted by inserting the connector into different mounting slots, thereby further adjusting the angle of the auxiliary clamping.

[0009] Preferably, the fixed rod has a uniformly spaced positioning groove along its centerline on its annular circumferential surface. A positioning block is inserted into the positioning groove, and a locking rod is fixedly connected to the positioning block on the outer side of the positioning groove. Multiple fixed blocks are fixedly connected to the vertical surface of the clamping plate. The fixed block has a locking slot on its annular circumferential surface, and the locking rod is embedded in the locking slot. In use, for the valve body surface that needs to be exposed for processing, the fixed rod at the corresponding position is first pressed. After the end of the fixed rod used for pressing moves towards the clamping plate, the positioning block is inserted into the positioning groove. The locking rod on the positioning block is engaged in the locking slot on the fixed block, and the position of the fixed rod is locked and fixed, exposing the surface of the valve body that needs to be processed.

[0010] Preferably, one end of the fixed rod close to the baffle is fixedly connected with an extension rod, and the end of the extension rod penetrates through the baffle; in use, when the valve body needs to be surface processed after being clamped and fixed, the extension rod is pulled to drive the fixed rod to further compress the compression spring, the clamped fixed rod no longer extrudes the surface of the valve body, then the positioning block is inserted into the positioning groove for clamping, the applicable range of the clamping of the fixed rod is increased, and the clamping frequency of the valve body is reduced.

[0011] Preferably, the end of the fixed rod away from the compression spring is provided with a rubber block, and the surface of the rubber block is arc-shaped; in use, when the fixed rod extrudes the surface of the valve body, the rubber block will extrude the valve body instead of the fixed rod, the arc-shaped surface of the rubber block improves the extrusion contact effect between the rubber block and the irregular surface of the valve body, the extrusion makes the rubber block deform to further increase the contact area between the rubber block and the valve body, and the stability of the clamping of the valve body is further improved.

[0012] Preferably, a roller is arranged between the fixed rod and the rubber block, the roller is movably embedded into the rubber block and the fixed rod, and a plurality of connecting springs are arranged between the rubber block and the fixed rod; in use, when the rubber block extrudes the surface of the valve body, for the irregular surface of the valve body, the rubber block can be deflected through the roller, the position is limited through the connecting spring, and the rubber block is deflected synchronously when extruding the surface of the valve body.

[0013] Preferably, the fixed rod comprises a first connecting rod and a second connecting rod, the end of the second connecting rod is provided with a connecting groove, a connecting plate is inserted into the connecting groove, a plurality of connecting holes are uniformly formed in the top surface of the connecting plate, the connecting plate is fixedly connected with the first connecting rod, a positioning pin is inserted into the connecting groove, and the bottom end of the positioning pin is inserted into the connecting hole; in use, the length of the whole fixed rod is changed by adjusting the insertion depth of the connecting plate and the distance between the first connecting rod and the second connecting rod, then the positioning pin is inserted into the connecting hole for clamping, and the length of the fixed rod is adjusted to have integrity after the adjustment, and the fixed rod can be synchronously adjusted for different sizes of valve bodies.

[0014] Preferably, a plurality of first clamping grooves are annularly formed in the annular circumferential surface of the first connecting rod, a plurality of second clamping grooves are annularly formed in the annular circumferential surface of the second connecting rod, and a connecting column is inserted into the first clamping groove and the second clamping groove; in use, when the fixed rod moves relative to the clamping plate, the connecting column will contact with the through hole provided on the surface of the clamping plate for the movement of the fixed rod instead of the gap between the first connecting rod and the second connecting rod.

[0015] Preferably, the baffle plate is provided with a brake hole corresponding to the position of the compression spring, a friction block is inserted into the brake hole, the friction block is connected with the end of the compression spring, and a friction force exists between the friction block and the brake hole, and the value of the friction force is less than the critical value of damage of the fixed rod extruding the EGR valve body; in use, when the fixed rod extrudes the valve body surface with excessive force, the friction block at the end of the compression spring moves in the brake hole, avoiding the compression spring from being further compressed by the fixed rod, and limiting the extrusion force of the fixed rod on the valve body.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The EGR valve body machining clamp disclosed by the present application, by arranging a plurality of fixed rods on the clamping plate, in use, the EGR valve body to be machined is placed at the center of the workbench, then the upper tightening screw is twisted and tightened, when the upper tightening screw is engaged with the threaded hole on the first fixing piece, the clamping plate is moved by the connecting frame, when the clamping plate moves close to the surface of the valve body, the fixed rods on the clamping plate extrude the surface of the valve body, then the fixed rods move relative to the clamping plate, the compression spring between the fixed rods and the baffle plate is compressed, the plurality of fixed rods extrude the irregular surface of the valve body, the clamping and fixing area of the clamp on the valve body is increased, the clamping effect can be ensured without excessively increasing the clamping force, the valve body surface is prevented from being excessively extruded and deformed and damaged, and the stability of the EGR valve during machining can be ensured.

[0018] 2. The EGR valve body machining clamp disclosed by the present application, by arranging a friction block on the baffle plate, when the fixed rod extrudes the surface of the valve body with excessive force, the friction block at the end of the compression spring moves in the brake hole, avoiding the compression spring from being further compressed by the fixed rod, limiting the extrusion force of the fixed rod on the valve body, and further preventing the valve body from being extruded and deformed and damaged. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below with reference to the drawings.

[0020] Figure 1 is a perspective view of the present application;

[0021] Figure 2 is a perspective view of the present application Figure 1 is an enlarged schematic view of part A in the present application;

[0022] Figure 3 is a schematic view of the structure on the baffle plate of the present application;

[0023] Figure 4 is a perspective view of the present application Figure 3 is an enlarged schematic view of part B in the present application;

[0024] Figure 5 is an exploded schematic view of the rubber block of the fixed rod of the present application;

[0025] Figure 6Is the fixed rod of the present application is resolved schematic diagram;

[0026] Figure 7 Is the fixed rod of the present application is resolved schematic diagram;

[0027] In the figure: 1, workbench;11, first fixed part;12, tighten screw;13, connecting frame;14, clamping plate;15, baffle;16, fixed rod;161, first connecting rod;162, second connecting rod;17, compression spring;18, friction block;2, moving plate;21, installation slot;22, connecting piece;23, second fixed part;3, positioning slot;31, positioning block;32, clamping rod;33, fixed block;4, rubber block;41, roller;42, connecting spring;5, connecting slot;51, connecting plate;52, connecting hole;53, positioning pin;6, first clamping slot;61, second clamping slot;62, connecting column;7, extension rod. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments. Example one

[0029] As Figures 1-2As shown, an EGR valve body machining fixture according to an embodiment of the present invention includes a worktable 1. A pair of first fixing members 11 are mounted on the top surface of the worktable 1. A tightening screw 12 is engaged with the vertical surface of the first fixing member 11. A connecting frame 13 is movably mounted at the end of the tightening screw 12. A clamping plate 14 is fixedly connected to the end of the connecting frame 13 away from the tightening screw 12. Fixing rods 16 are evenly arrayed on the vertical surface of the clamping plate 14. A compression spring 17 is provided at the end of the fixing rod 16 near the first fixing member 11. A baffle 15 is provided at the end of the compression spring 17 away from the fixing rod 16. A linkage frame is provided between the baffle 15 and the clamping plate 14. The surface of the EGR valve body is irregularly shaped. When the existing fixture clamps hold and fix the EGR valve body, the contact area between the clamping plate 14 and the valve body is limited. In order to ensure the clamping effect on the valve body, it is necessary to appropriately increase the clamping force of the clamping plate 14 on the valve body, which can easily cause the valve body to be crushed. Excessive compression can cause deformation and damage. When the clamping force is reduced, the clamping effect of the clamping plate 14 on the valve body decreases simultaneously, making it impossible to guarantee the stability of EGR valve processing. In this embodiment of the invention, the EGR valve body to be processed is placed at the center of the worktable 1, and then the tightening screw 12 is turned. When the tightening screw 12 engages with the threaded hole on the first fixing member 11, it drives the clamping plate 14 to move through the connecting frame 13. When the clamping plate 14 moves closer to the surface of the valve body, the fixing rod 16 on the clamping plate 14 compresses the surface of the valve body. Then the fixing rod 16 moves relative to the clamping plate 14, and the compression spring 17 between the fixing rod 16 and the baffle 15 is compressed. Multiple fixing rods 16 compress and fix the irregular surface of the valve body, increasing the clamping and fixing area of ​​the fixture on the valve body. The clamping effect can be guaranteed without excessively increasing the clamping force, avoiding excessive compression and deformation damage to the valve body surface, and ensuring the stability of EGR valve processing.

[0030] A pair of movable plates 2 are slidably connected to the top surface of the workbench 1. The ends of the movable plates 2 are connected to the output ends of the hydraulic components. A second fixing member 23 is installed on the top surface of the movable plates 2. In use, the second fixing member 23 is installed on the top of the movable plates 2, and the relevant structure for clamping the valve body is installed on the second fixing member 23. Then, the position of the movable plates 2 is adjusted by the hydraulic components. The clamping structure on the second fixing member 23 can also assist in clamping the surface of the valve body, further improving the clamping stability of the overall clamp on the valve body and improving the balance of the clamping and fixing force on the valve body.

[0031] The top surface of the movable plate 2 is evenly provided with multiple mounting slots 21 in an arc shape. A connector 22 is installed inside the mounting slot 21. The connector 22 is connected to the second fixing member 23 by a thread. In use, the connector 22 can be inserted into different mounting slots 21 to adjust the position of the second fixing member 23 and further adjust the angle of the auxiliary clamping to improve the clamping effect according to the actual shape of the valve body.

[0032] like Figures 3-4As shown, the annular peripheral surface of the fixed rod 16 is uniformly provided with a positioning groove 3 along the center line direction, and the positioning groove 3 is inserted with a positioning block 31. The positioning block 31 is fixedly connected with a clamping rod 32 on the outer side of the positioning groove 3. The vertical surface of the clamping plate 14 is fixedly connected with a plurality of fixed blocks 33, and the annular peripheral surface of the fixed block 33 is provided with a bayonet. The clamping rod 32 is embedded into the bayonet. In use, for the valve body surface that needs to be processed, the fixed rod 16 at the corresponding position is first extruded, and the end of the fixed rod 16 for extrusion moves to the clamping plate 14. Then, the positioning block 31 is inserted into the positioning groove 3, and the clamping rod 32 on the positioning block 31 is clamped in the bayonet on the fixed block 33. The position of the fixed rod 16 is clamped and fixed. The surface of the valve body that needs to be processed is exposed, the flexibility of the clamp clamping the valve body is improved, and the valve body processing is facilitated.

[0033] As shown in Figure 7 The end of the fixed rod 16 close to the baffle 15 is fixedly connected with an extension rod 7, and the end of the extension rod 7 penetrates through the baffle 15. In use, when the valve body is clamped and fixed and part of the surface needs to be processed, the extension rod 7 is pulled to further extrude the compression spring 17, and the fixed rod 16 that is pulled no longer extrudes the valve body surface. Then, the positioning block 31 is inserted into the positioning groove 3 for clamping, which increases the applicable range of the clamping of the fixed rod 16 and reduces the number of times the valve body is clamped and fixed. In addition, in actual operation, the fixed rod 16 needs to be clamped and fixed step by step from the outside to the inside.

[0034] As shown in Figure 5 The end of the fixed rod 16 away from the compression spring 17 is provided with a rubber block 4, and the surface of the rubber block 4 is an arc surface. In use, when the fixed rod 16 extrudes the valve body surface, the rubber block 4 will extrude the valve body instead of the fixed rod 16. The arc surface of the rubber block 4 improves the extrusion contact effect between the rubber block 4 and the irregular surface of the valve body. The extrusion further increases the contact area between the rubber block 4 and the valve body by deforming the rubber block 4, which further improves the stability of the clamped valve body.

[0035] A roller 41 is arranged between the fixed rod 16 and the rubber block 4, and the roller 41 is movably embedded into the rubber block 4 and the fixed rod 16. A plurality of connecting springs 42 are arranged between the rubber block 4 and the fixed rod 16. In use, when the rubber block 4 extrudes the valve body surface, for the irregular valve body surface, the rubber block 4 can be deflected through the roller 41, and the position is limited through the connecting spring 42. The rubber block 4 is deflected synchronously when extruding the valve body surface, which further improves the extrusion contact effect between the rubber block 4 and the irregular surface of the valve body.

[0036] As shown in Figure 5 As shown in Figure 6As shown, the fixed rod 16 includes a first connecting rod 161 and a second connecting rod 162, the end of the second connecting rod 162 is provided with a connecting groove 5, the inside of the connecting groove 5 is inserted with a connecting plate 51, the top surface of the connecting plate 51 is uniformly provided with a plurality of connecting holes 52, the connecting plate 51 is fixedly connected with the first connecting rod 161, the annular surface of the second connecting rod 162 is inserted with a positioning pin 53, the bottom end of the positioning pin 53 is inserted into the connecting hole 52; in use, by adjusting the insertion depth of the connecting plate 51, the distance between the first connecting rod 161 and the second connecting rod 162 is adjusted, so that the length of the whole fixed rod 16 is changed, and then the positioning pin 53 is inserted into the connecting hole 52 and clamped, the fixed rod 16 has integrity after being adjusted in length, and can be synchronously adjusted for different size valve bodies, thereby increasing the applicability of the fixed rod 16.

[0037] The annular surface of the first connecting rod 161 is annularly provided with a plurality of first clamping grooves 6, the annular surface of the second connecting rod 162 is annularly provided with a plurality of second clamping grooves 61, and the first connecting rod 161 and the second clamping grooves 61 are inserted with a connecting column 62; in use, when the fixed rod 16 moves relative to the clamping plate 14, the connecting column 62 will replace the gap between the first connecting rod 161 and the second connecting rod 162 to contact the through hole provided on the surface of the clamping plate 14 for the movement of the fixed rod 16, so as to avoid the clamping of the gap of the fixed rod 16 and the through hole. Embodiment two

[0038] As Figure 3 shown, the other embodiment of the present application is that the baffle 15 is provided with a brake hole at the corresponding position of the compression spring 17, the brake hole is inserted with a friction block 18, the friction block 18 is connected with the end of the compression spring 17, there is a friction force between the friction block 18 and the brake hole, and the value of the friction force is less than the critical value of damage of the fixed rod 16 to the EGR valve body; in use, when the fixed rod 16 presses the surface of the valve body with too much force, the friction block 18 at the end of the compression spring 17 moves in the brake hole, so as to avoid the compression spring 17 from being further compressed by the fixed rod 16, limit the extrusion force of the fixed rod 16 to the valve body, and further prevent the valve body from being extruded and deformed and damaged.

[0039] In use, the EGR valve body to be processed is placed at the center of the workbench 1, and then the screw rod 12 is tightened. When the screw rod 12 is engaged with the threaded hole on the first fixing member 11, the clamping plate 14 is moved by the connecting frame 13. When the clamping plate 14 moves close to the surface of the valve body, the fixed rods 16 on the clamping plate 14 extrude the surface of the valve body. Then, the fixed rods 16 move relative to the clamping plate 14, and the compression spring 17 between the fixed rods 16 and the baffle 15 is compressed. The multiple fixed rods 16 extrude and fix the irregular surface of the valve body, increase the clamping and fixing area of the clamp on the valve body, ensure the clamping effect without excessive increase of clamping force, avoid excessive extrusion and deformation damage of the surface of the valve body, and ensure the stability of the EGR valve processing. In use, the second fixing member 23 is installed on the top of the moving plate 2, and the clamp related structure is installed on the second fixing member 23. Then, the position of the moving plate 2 is adjusted by the hydraulic part, and the clamp structure on the second fixing member 23 can also assist in clamping the surface of the valve body. The connecting part 22 can be inserted into different installation grooves 21 to adjust the position of the second fixing member 23 and further adjust the angle of auxiliary clamping. For the valve body surface that needs to be processed, the fixed rods 16 at the corresponding position are first extruded, and then the positioning block 31 is inserted into the positioning groove 3. The clamping rod 32 on the positioning block 31 is clamped in the clamping hole on the fixed block 33, and the position of the fixed rod 16 is clamped and fixed.

[0040] Wherein in use, when the valve body needs to be machined after being clamped and fixed, pull the extension rod 7, the extension rod 7 drives the fixed rod 16 to further extrude the compression spring 17, the fixed rod 16 is no longer extruded to the surface of the valve body, then insert the positioning block 31 into the positioning groove 3 to fix, increase the applicable range of the fixed rod 16 being clamped, and reduce the number of times of clamping the valve body; Wherein when the fixed rod 16 extrudes the surface of the valve body, the rubber block 4 will extrude the valve body instead of the fixed rod 16, the curved surface of the rubber block 4 improves the extrusion contact effect between the rubber block 4 and the irregular surface of the valve body, and the extrusion makes the rubber block 4 deform to further increase the contact area between the valve body; Wherein when the rubber block 4 extrudes the surface of the valve body, for irregular valve body surface, the rubber block 4 can be deflected by the roller 41, the position is limited by the connecting spring 42, and the rubber block 4 is deflected synchronously when extruding the surface of the valve body; Wherein by adjusting the depth of the connecting plate 51 inserted into the depth, adjusting the distance between the first connecting rod 161 and the second connecting rod 162, the length of the whole fixed rod 16 is changed, then the positioning pin 53 is inserted into the connecting hole 52 to fix, the fixed rod 16 has integrity after being adjusted in length, and different sizes of valve body can be adjusted and used synchronously; Wherein when the fixed rod 16 moves relative to the clamping plate 14, the connecting column 62 will replace the gap between the first connecting rod 161 and the second connecting rod 162 and the through hole on the surface of the clamping plate 14 for the movement of the fixed rod 16 to contact; Wherein when the fixed rod 16 extrudes the surface of the valve body too hard, the friction block 18 at the end of the compression spring 17 moves in the brake hole, avoiding the compression spring 17 being further compressed by the fixed rod 16, limiting the extrusion force of the fixed rod 16 to the valve body, and further preventing the valve body from being extruded and deformed and damaged.

[0041] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A machining fixture for an EGR valve body, characterized in that: The system includes a workbench (1), on the top surface of which a pair of first fixing members (11) are installed. A tightening screw (12) is engaged with the vertical surface of the first fixing member (11). A connecting frame (13) is movably installed at the end of the tightening screw (12). A clamping plate (14) is fixedly connected to the end of the connecting frame (13) away from the tightening screw (12). Fixing rods (16) are evenly arranged in an array on the vertical surface of the clamping plate (14). A compression spring (17) is provided at the end of the fixing rod (16) near the first fixing member (11). A baffle (15) is provided at the end of the compression spring (17) away from the fixing rod (16). A linkage frame is provided between the baffle (15) and the clamping plate (14). The fixed rod (16) has a positioning groove (3) evenly distributed along the center line on its annular circumferential surface. A positioning block (31) is inserted into the positioning groove (3). A locking rod (32) is fixedly connected to the positioning block (31) on the outer side of the positioning groove (3). Multiple fixing blocks (33) are fixedly connected to the vertical surface of the clamping plate (14). A locking slot is opened on the annular circumferential surface of the fixing block (33). The locking rod (32) is embedded in the locking slot. For the valve body surface that needs to be exposed for processing, first press the fixing rod (16) at the corresponding position. After the end of the fixing rod (16) used for pressing moves towards the clamping plate (14), insert the positioning block (31) into the positioning groove (3). The locking rod (32) on the positioning block (31) is engaged in the locking slot on the fixing block (33). The position of the fixing rod (16) is locked and fixed, exposing the surface of the valve body that needs to be processed. An extension rod (7) is fixedly connected to one end of the fixed rod (16) near the baffle (15), and the end of the extension rod (7) passes through the baffle (15). By pulling the extension rod (7), the extension rod (7) drives the fixed rod (16) to further compress the spring (17). The pulled fixed rod (16) no longer compresses the valve body surface. Then, the positioning block (31) is inserted into the positioning groove (3) and secured.

2. The EGR valve body machining fixture according to claim 1, characterized in that: The top surface of the workbench (1) is slidably connected to a pair of movable plates (2), the ends of the movable plates (2) are connected to the output end of the hydraulic components, and a second fixing component (23) is installed on the top surface of the movable plates (2).

3. The EGR valve body machining fixture according to claim 2, characterized in that: The top surface of the movable plate (2) is uniformly provided with multiple mounting slots (21) in an arc shape. A connector (22) is installed inside the mounting slot (21). The connector (22) is connected to the second fixing member (23) by a thread.

4. The EGR valve body machining fixture according to claim 1, characterized in that: A rubber block (4) is installed at the end of the fixing rod (16) away from the compression spring (17), and the surface of the rubber block (4) is an arc-shaped surface.

5. The EGR valve body machining fixture according to claim 4, characterized in that: A roller (41) is provided between the fixed rod (16) and the rubber block (4). The roller (41) is movably embedded in the rubber block (4) and the fixed rod (16). A plurality of connecting springs (42) are provided between the rubber block (4) and the fixed rod (16).

6. The EGR valve body machining fixture according to claim 1, characterized in that: The fixing rod (16) includes a first connecting rod (161) and a second connecting rod (162). The end of the second connecting rod (162) is provided with a connecting groove (5). A connecting plate (51) is inserted into the connecting groove (5). A plurality of connecting holes (52) are evenly provided on the top surface of the connecting plate (51). The connecting plate (51) is fixedly connected to the first connecting rod (161). A positioning pin (53) is inserted into the annular circumferential surface of the second connecting rod (162). The bottom end of the positioning pin (53) is inserted into the connecting hole (52).

7. The EGR valve body machining fixture according to claim 6, characterized in that: The first connecting rod (161) has a plurality of first slots (6) formed in a ring on its annular circumferential surface, and the second connecting rod (162) has a plurality of second slots (61) formed in a ring on its annular circumferential surface. A connecting post (62) is inserted into the first connecting rod (161) and the second slot (61).

8. The EGR valve body machining fixture according to claim 1, characterized in that: The baffle (15) has a brake hole at the corresponding position of the compression spring (17), and a friction block (18) is inserted into the brake hole. The friction block (18) is connected to the end of the compression spring (17). There is friction between the friction block (18) and the brake hole. The friction value is less than the critical value at which the fixed rod (16) will crush the EGR valve body.

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