A high-efficiency hydraulic tool for main reduction shell

Abstract

This application discloses a high-efficiency hydraulic fixture for a main reduction housing, including a four-axis rotary table. The four-axis rotary table includes a left tailstock and a right power tailstock, both of which are equipped with turntables. The turntables are connected to four-axis connecting plates, and a bridge plate spans between the two four-axis connecting plates. The bridge plate is equipped with multiple rotary clamping mechanisms, and an auxiliary support mechanism is located at the lower center of the bridge plate. The rotary clamping mechanisms clamp the main reduction housing in one direction, while the auxiliary support mechanism provides lateral auxiliary support to the main reduction housing. A two-way clamping method is adopted. Vertical clamping ensures that the main reduction housing is fixed in the vertical direction, while lateral auxiliary support provides additional support force from the side. The two work together to effectively limit the degree of freedom of the main reduction housing in all directions, greatly enhance the stability of the clamping, and enable the main reduction housing to maintain a relatively fixed position during processing, reducing processing errors caused by vibration and displacement.

Description

Technical Field

[0001] This application belongs to the field of gearbox housing clamping tools, and particularly relates to a high-efficiency hydraulic tool for main gearbox housings. Background Technology

[0002] In the automotive manufacturing industry, the chassis, as a key supporting component for overall vehicle performance, directly impacts the vehicle's safety, stability, and reliability through the quality and performance of its various components. The final drive housing, as a crucial component of the chassis, plays a vital role in the vehicle's power transmission and steering systems. Structurally, the final drive housing is complex, containing numerous holes and surfaces with extremely stringent positional requirements. The precision of their fit with other components directly affects the overall performance of the final drive; even slight deviations can lead to reduced transmission efficiency, increased noise, or even serious mechanical failures.

[0003] In current manufacturing processes, four-axis rotary milling and drilling are commonly performed using a four-axis rotary table with specialized fixtures. Typically, the fixture uses a pressure plate to vertically clamp the reducer housing. However, given the large size and irregular shape of the main reducer housing, existing clamping equipment faces numerous challenges during clamping. When the rotary table rotates the main reducer housing on the specialized fixture and performs cutting operations, the weight of the housing is applied to the pressure plate and then transmitted to the power component connected to the pressure plate. This leads to unstable clamping, causing the workpiece to easily vibrate and shift. This not only significantly reduces machining accuracy but also causes positional deviations of holes and surfaces to exceed allowable limits. Therefore, developing a device that can meet the needs of mass production, improve production efficiency, and stably clamp the reducer housing, thereby improving the dimensional accuracy of batch products, is of paramount practical importance. Utility Model Content

[0004] This utility model provides a high-efficiency hydraulic tooling for the main reducer housing, which solves the problem that in the existing processing and manufacturing process of automobile main reducer housing, when using existing fixtures for milling and drilling, the clamping is unstable and prone to vibration and displacement, resulting in reduced processing accuracy, affecting the cooperation between the main reducer and other components, and reducing the surface quality of the product.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-efficiency hydraulic fixture for a main reduction housing includes a four-axis rotary table, which includes a left tailstock and a right power tailstock. Both the left and right power tailstocks are equipped with turntables, and the turntables are connected to four-axis connecting plates. A bridge plate spans between the two four-axis connecting plates. The bridge plate is equipped with multiple rotary clamping mechanisms, each of which includes a drive component and a pressure plate. The drive component can drive the pressure plate to rotate and lift to vertically clamp and position the main reduction housing. The bridge plate has two symmetrical concave receiving portions in the middle, and the two symmetrical bearing mounting portions of the main reduction housing can pass through the concave receiving portions.

[0007] An auxiliary support mechanism is provided at the lower center of the bridge plate. The auxiliary support mechanism includes a power component and lateral clamping components located on both sides of the power component. The operation of the power component can drive the lateral clamping components on both sides to move toward the inner wall of the housing corresponding to the main reduction housing bearing mounting part and contact the inner wall of the housing to achieve lateral abutment of the main reduction housing for stable clamping.

[0008] In the aforementioned structure, the rotary clamping mechanism clamps the main reduction housing in one direction, while the auxiliary support mechanism provides lateral auxiliary support to the main reduction housing. The two-way clamping method ensures the main reduction housing is fixed vertically by vertical clamping, while the lateral auxiliary support provides additional support from the side. The combined effect of these two mechanisms effectively restricts the main reduction housing's degrees of freedom in all directions, greatly enhancing clamping stability. This allows the main reduction housing to maintain a relatively fixed position during processing, reducing processing errors caused by vibration and displacement. The processed main reduction housing can then better cooperate with other components, improving the performance of the entire automotive power transmission and steering system.

[0009] In a preferred implementation, the driving component is a rotary cylinder, and the output end of the rotary cylinder is connected to a pressure plate. The rotary cylinder can drive the pressure plate to switch between a first position and a second position. When the pressure plate is in the first position, the vertical projection of the pressure plate is located outside the main reduction housing, allowing the main reduction housing to be placed on the bridge plate from above. When the pressure plate is in the second position, the vertical projection of the pressure plate is located above the main reduction housing flange, and the pressure plate can abut against the upper plane of the main reduction housing flange.

[0010] In a preferred implementation, four corner cylinders are provided and positioned at the four corners of the main reduction housing. The corner cylinders are detachably connected to the bridge plate.

[0011] In a preferred embodiment, the power component is a double-piston rod hydraulic cylinder, which is mounted below the bridge plate via a mounting base, and the two piston rods of the double-piston rod hydraulic cylinder are connected to a lateral clamping component.

[0012] In a preferred implementation, the upper surface of the bridge plate is provided with multiple equal-height blocks, and the lower surface of the flange of the main reducing shell abuts against the upper side of the equal-height blocks.

[0013] In the preferred implementation, the bridge plate is provided with locating pins and guide pins, which are inserted into different holes in the main reduction flange to achieve guiding and positioning.

[0014] After the main reduction housing is guided to its approximate position by the guide pin, the locating pin is inserted into the flange hole. Through close contact with the hole wall, the positional accuracy of the main reduction housing in both the horizontal and vertical directions is ensured, providing a reliable positioning reference for subsequent machining. High-precision positioning guarantees that the main reduction housing remains in the same position each time it is clamped.

[0015] In the preferred implementation, the guide pin is bullet-shaped and has a clearance fit with the flange hole, while the locating pin is a shoulder-type locating pin that has a transition fit with the flange hole.

[0016] In a preferred implementation, a plurality of prepositioning blocks are provided on the bridge plate. The shape of the prepositioning blocks is adapted to the local concave contour shape of the main reduction shell flange, and the prepositioning blocks are located outside the local concave contour for prepositioning the main reduction shell.

[0017] The positioning block on the outside provides a reliable reference for the main reduction housing. Operators can quickly determine whether the main reduction housing is placed correctly based on the position of the positioning block. When the main reduction housing is placed on the bridge plate, the positioning block is located on the outside of the local concave contour of the main reduction housing flange. When the main reduction housing is placed on the bridge plate, the positioning block restricts the main reduction housing from the outside to prevent the main reduction housing from shifting in the horizontal direction, which further improves the positioning efficiency.

[0018] In a preferred embodiment, the left tailstock and right power tailstock are mounted on an extension block. By adjusting the height of the extension block, the distance between the bridge plate and the processing table can be adjusted. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain this application and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic three-dimensional structural diagram of one embodiment of the hydraulic tooling of this application is shown;

[0021] Figure 2 A schematic top view of one embodiment of the hydraulic tooling of this application is shown.

[0022] Figure 3 A schematic three-dimensional structural diagram of one embodiment of the hydraulic tooling auxiliary support mechanism of this application is shown;

[0023] Figure 4A schematic three-dimensional structural diagram illustrating one embodiment of the assembly of the main reducing shell and the hydraulic fixture of this application is shown.

[0024] Label Explanation:

[0025] 1. Left tailstock; 2. Right power tailstock; 3. Turntable; 4. Worktable; 5. Four-axis connecting plate; 6. Bridge plate; 60. Four-axis clamping mechanism; 600. Drive component; 601. Pressure plate; 61. Recessed mounting part; 62. Auxiliary support mechanism; 620. Power component; 621. Lateral clamping mechanism; 622. Mounting seat; 63. Equalizing block; 64. Positioning pin; 65. Guide pin; 66. Pre-positioning block; 7. Heightening block; 8. Main reduction housing; 80. Main reduction housing flange. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0027] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In this utility model, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] In this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0030] The present invention will now be described with reference to the accompanying drawings.

[0031] The specific solution adopted is as follows:

[0032] like Figure 1-4 As shown, this utility model provides

[0033] A high-efficiency hydraulic fixture for a main reducer housing includes a four-axis rotary table. The four-axis rotary table includes a left tailstock 1 and a right power tailstock 2. Both the left tailstock 1 and the right power tailstock 2 are provided with turntables 3. The turntables 3 are connected to four-axis connecting plates 5. A bridge plate 6 spans between the two four-axis connecting plates 5. The bridge plate 6 is provided with multiple rotary clamping mechanisms. Each rotary clamping mechanism includes a drive component 600 and a pressure plate 601. The drive component 600 can drive the pressure plate 601 to perform rotational and lifting movements to vertically clamp and position the main reducer housing 8. The bridge plate 6 has two symmetrical concave receiving portions in the middle. The two symmetrical bearing mounting portions of the main reducer housing 8 can pass into the concave receiving portions.

[0034] The lower center of the bridge plate 6 is provided with an auxiliary support mechanism 62. The auxiliary support mechanism 62 includes a power component 620 and lateral clamping components located on both sides of the power component 620. The operation of the power component 620 can drive the lateral clamping components on both sides to move toward the inner wall of the housing corresponding to the bearing mounting part of the main reducer housing 8 and contact the inner wall of the housing to achieve lateral abutment of the main reducer housing 8 for stable clamping.

[0035] The high-efficiency hydraulic fixture of the main reducer housing 8 used in this application typically employs a bidirectional clamping method with unidirectional vertical clamping and reverse lateral auxiliary support. Vertical clamping ensures the main reducer housing 8 is fixed in the vertical direction, while the lateral auxiliary support provides additional support from the side. The two work together to effectively limit the degrees of freedom of the main reducer housing 8 in all directions, greatly enhancing clamping stability and allowing the main reducer housing 8 to maintain a relatively fixed position during machining, reducing machining errors caused by vibration and displacement. The main reducer housing 8 is large and irregularly shaped, making unidirectional vertical clamping insufficient to fully accommodate its shape. The lateral auxiliary support mechanism 62, driven by a power component 620, moves the lateral clamping component according to the shape of the inner wall of the housing corresponding to the bearing mounting part of the main reducer housing 8, ensuring close contact with the inner wall of the housing. This achieves effective and stable clamping of the irregularly shaped main reducer housing 8, ensuring that the main reducer housing 8 does not wobble due to its shape during machining. Stable clamping is a prerequisite for ensuring machining accuracy. Because the fixture of this application has high clamping stability, the main reducer housing 8 will not easily move during the machining process, thereby effectively reducing the positional deviation of the hole and surface, enabling the machined main reducer housing 8 to better cooperate with other parts and improve the performance of the entire automotive power transmission and steering system.

[0036] In a preferred embodiment of this application, the driving component 600 is a rotary cylinder, and the output end of the rotary cylinder is connected to the pressure plate 601. The rotary cylinder can drive the pressure plate 601 to switch between a first position and a second position. When the pressure plate 601 is in the first position, its vertical projection is located outside the main reduction housing 8. When the main reduction housing 8 is placed on or removed from the bridge plate 6, the pressure plate 601 will not obstruct the placement and removal path of the main reduction housing 8. Workers can easily place the main reduction housing 8 onto the bridge plate 6 from above without performing complicated operations to avoid the pressure plate 601, greatly improving the convenience and efficiency of workpiece loading and unloading. When the pressure plate 601 is in the second position, its vertical projection is located above the position of the main reduction housing flange 80 and can abut against the upper plane of the main reduction housing flange 80, achieving precise positioning and reliable clamping of the main reduction housing 8. This precise positioning and clamping can ensure the positional stability of the main reduction housing 8 during processing and reduce processing accuracy problems caused by clamping errors.

[0037] Because the corner cylinder can quickly and accurately switch the pressure plate 601 to the first and second positions, the reduction in loading / unloading time and clamping time in mass production can significantly improve overall production efficiency and reduce production costs. Furthermore, the corner cylinder has good controllability and response speed. On automated production lines, the movement of the corner cylinder can be controlled by a program to achieve automatic switching of the pressure plate 601 and automatic clamping of the main reducing housing 8. The corner cylinder's structural design is relatively compact, meeting the requirements for driving the pressure plate 601 while occupying less space. It is also easier to operate during maintenance and repair, reducing maintenance costs and time.

[0038] The hydraulically driven rotary cylinder used in this application boasts high reliability and stability, enabling it to withstand the harsh working environment of automotive manufacturing workshops, such as dust and oil contamination. It maintains stable performance during prolonged, high-intensity use, reducing the probability of malfunctions.

[0039] Furthermore, four corner cylinders are provided, positioned at the four corners of the main reducing housing 8. These corner cylinders are detachably connected to the bridge plate 6. Although the main reducing housing 8 has an irregular shape, when placed on the bridge plate 6, its edges roughly outline a relatively stable region. This outline can typically be approximated as a rectangle (or a similar rectangle), and the four corner positions are based on the four corner points of this approximate rectangle. This fully utilizes the space of the bridge plate 6 and avoids complex fixture structures. This compact layout allows the fixture to achieve maximum functionality within a limited space, improving space utilization.

[0040] In a preferred embodiment of this application, the power component 620 is a double-piston rod hydraulic cylinder, which is mounted below the bridge plate 6 via a mounting base 622. The two piston rods of the double-piston rod hydraulic cylinder are connected to the lateral clamping components. The two piston rods of the double-piston rod hydraulic cylinder move simultaneously outwards or inwards, providing symmetrical and stable driving force to the lateral clamping components on both sides. This bidirectional symmetrical driving method ensures that the pressure exerted by the lateral clamping components on the inner wall of the housing corresponding to the bearing mounting portion of the main reduction housing 8 is evenly distributed, avoiding the problem of uneven force distribution caused by unilateral driving, thereby improving the stability and reliability of clamping.

[0041] The dual-piston rod hydraulic cylinder is mounted below the bridge plate 6 via mounting base 622. This layout makes full use of the space below the bridge plate 6, avoiding excessive space occupation above or to the side of the bridge plate 6, thus making the entire fixture structure more compact. The compact structure helps reduce the size and weight of the fixture, facilitates installation, debugging and maintenance, and also reduces production costs.

[0042] Furthermore, it should be noted that the oil circuit connection structure and method of the double piston rod hydraulic cylinder and the rotary hydraulic cylinder in this application are all implemented using conventional means known in the prior art. The relevant technical content of this oil circuit connection is within the scope that can be understood and implemented by those skilled in the art based on existing knowledge, and therefore will not be elaborated in this application document.

[0043] See Figure 1The upper surface of the bridge plate 6 is provided with multiple equal-height blocks 63, and the lower surface of the flange of the main reduction housing 80 abuts against the upper side of the equal-height blocks 63. The equal-height blocks 63 provide a flat and stable support reference for the lower surface of the main reduction housing flange 80. During the machining process, the main reduction housing 8 needs to be placed on the bridge plate 6, and the surface of the bridge plate 6 may have slight unevenness. The equal-height blocks 63, through their height consistency and flat upper surface, ensure that the lower surface of the main reduction housing flange 80 can be evenly stressed, avoiding tilting or shaking of the main reduction housing 8 due to unevenness of the bridge plate 6, thereby ensuring machining accuracy.

[0044] The setting of the equal height block 63 provides a uniform height standard for the placement of the main reducing shell 8, ensuring that the main reducing shell 8 is at the same height each time it is clamped, which facilitates subsequent processing operations and measurements, and improves the consistency and repeatability of production.

[0045] In a preferred embodiment of this application, the bridge plate 6 is provided with a locating pin 64 and a guide pin 65. Both the locating pin 64 and the guide pin 65 are inserted into different holes in the main reduction housing flange 80 to achieve guiding and positioning. Furthermore, the guide pin 65 is bullet-shaped and has a clearance fit with the flange hole, while the locating pin 64 is a shoulder-type locating pin that has a transition fit with the flange hole. The head of the bullet-shaped guide pin 65 is conical. During the placement of the main reduction housing 8 onto the bridge plate 6, even if there is a certain deviation in the position of the main reduction housing 8, the conical head of the guide pin 65 can still smoothly insert into the corresponding hole in the main reduction housing flange 80. The guide pin 65 has a clearance fit with the flange hole, for example, a clearance of 0.5 mm. This relatively large clearance can accommodate the initial positional deviation of the main reduction housing 8 during placement. The shoulder-type locating pin 64 has a transition fit with the flange hole, for example, a clearance of 0.02 mm. This tight fit can precisely restrict the degree of freedom of the main reduction housing 8 on the bridge plate 6. After the main reducing housing 8 is guided to its approximate position by the guide pin 65, the locating pin 64 is inserted into the flange hole. Through close contact with the hole wall, the positional accuracy of the main reducing housing 8 in both the horizontal and vertical directions is ensured, providing a reliable positioning reference for subsequent machining. High-precision positioning ensures that the position of the main reducing housing 8 remains consistent each time it is clamped. This is particularly important for multi-station machining or batch production, ensuring the consistency of the dimensional and shape accuracy of the machined main reducing housing 8, thereby improving product quality and production efficiency.

[0046] Further, see Figure 1 and Figure 4 Multiple prepositioning blocks 66 are provided on the bridge plate 6. The shape of the prepositioning blocks 66 is adapted to the local concave contour shape of the main reduction shell flange 80, and the prepositioning blocks 66 are located outside the local concave contour, for prepositioning the main reduction shell 8.

[0047] The positioning block 66 provides a reliable reference for the main reduction housing 8 by positioning it on the outside. The operator can quickly determine whether the main reduction housing 8 is placed correctly based on the position of the positioning block 66. When the main reduction housing 8 is placed on the bridge plate 6, the positioning block 66 is located on the outside of the local concave contour of the main reduction housing flange 80. When the main reduction housing 8 is placed on the bridge plate 6, the positioning block 66 restricts the main reduction housing 8 from the outside to prevent the main reduction housing 8 from shifting in the horizontal direction, which further improves the positioning efficiency.

[0048] The shape adaptation and external positioning of the pre-positioning block 66 enable rapid positioning of the main reducing housing 8, reducing the time and effort spent by operators during the positioning process. In mass production, rapid positioning and clamping is key to improving production efficiency. The use of the pre-positioning block 66 allows the main reducing housing 8 to be positioned and clamped quickly and accurately, significantly increasing the production speed of the production line and meeting the needs of large-scale production.

[0049] See Figure 1 The left tailstock 1 and the right power tailstock 2 are located on the heightening block 7. By adjusting the height of the heightening block 7, the distance between the bridge plate 6 and the processing table can be adjusted.

[0050] The bearing hole of the main reducer housing 8 is a critical structural component. If the distance between the bridge plate 6 and the machining table is too small, the bearing hole may directly abut against the worktable 4 when the main reducer housing 8 is placed. This physical contact will hinder the normal positioning of the main reducer housing 8 on the bridge plate 6, causing the main reducer housing 8 to fail to be accurately placed in the predetermined position, thus affecting the accuracy of subsequent machining. For example, when milling the end face of the main reducer housing 8, if the positioning is inaccurate, the milled end face may be uneven, and the perpendicularity with the bearing hole cannot be guaranteed. Meanwhile, by adjusting the height of the height-increasing block 7, the distance between the bridge plate 6 and the worktable 4 is increased, providing the main reducer housing 8 with greater rotation space, allowing it to be machined at different angles to meet the machining requirements of complex structures.

[0051] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0052] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-efficiency hydraulic tooling for a main reducing shell, comprising a four-axis rotary table, the four-axis rotary table including a left tailstock and a right power tailstock, both the left tailstock and the right power tailstock being provided with a turntable, characterized in that, The turntable is connected to a four-axis connecting plate, and a bridge plate spans between two of the four-axis connecting plates. The bridge plate is provided with multiple rotary clamping mechanisms, each of which includes a driving component and a pressure plate. The driving component can drive the pressure plate to rotate and lift to vertically clamp and position the main reduction housing. The bridge plate has two symmetrical concave receiving portions in the middle, and the two symmetrical bearing mounting portions of the main reduction housing can pass through the concave receiving portions. An auxiliary support mechanism is provided at the lower center of the bridge plate. The auxiliary support mechanism includes a power component and lateral clamping components located on both sides of the power component. The operation of the power component can drive the lateral clamping components on both sides to move toward the inner wall of the housing corresponding to the main reduction housing bearing mounting part and contact the inner wall of the housing to achieve lateral abutment of the main reduction housing for stable clamping.

2. The high-efficiency hydraulic tooling for the main reducing shell according to claim 1, characterized in that, The driving component is a rotary cylinder, and the output end of the rotary cylinder is connected to a pressure plate. The rotary cylinder can drive the pressure plate to switch between a first position and a second position. When the pressure plate is in the first position, the vertical projection of the pressure plate is located outside the main reduction housing, so as to allow the main reduction housing to be placed on the bridge plate from above. When the pressure plate is in the second position, the vertical projection of the pressure plate is located above the main reduction housing flange, and the pressure plate can abut against the upper plane of the main reduction housing flange.

3. The high-efficiency hydraulic tooling for the main reducing shell according to claim 2, characterized in that, Four corner cylinders are provided and located at the four corners of the main reduction housing. The corner cylinders are detachably connected to the bridge plate.

4. The high-efficiency hydraulic tooling for the main reducing shell according to claim 1, characterized in that, The power component is a double piston rod hydraulic cylinder, which is mounted under the bridge plate via a mounting base. The two piston rods of the double piston rod hydraulic cylinder are connected to a lateral clamping component.

5. The high-efficiency hydraulic tooling for the main reducing shell according to claim 1, characterized in that, The upper surface of the bridge plate is provided with multiple equal-height blocks, and the lower part of the flange of the main reduction shell abuts against the upper side of the equal-height blocks.

6. The high-efficiency hydraulic tooling for the main reducing shell according to claim 1, characterized in that, The bridge plate is equipped with locating pins and guide pins, which are inserted into different holes in the main reduction flange to achieve guiding and positioning.

7. The high-efficiency hydraulic tooling for the main reducing shell according to claim 6, characterized in that, The guide pin is bullet-shaped and fits with the flange hole with clearance, while the locating pin is a shoulder-type locating pin that fits with the flange hole with transition.

8. The high-efficiency hydraulic tooling for the main reducing shell according to claim 1, characterized in that, Multiple pre-positioning blocks are provided on the bridge plate. The shape of the pre-positioning blocks is adapted to the local concave contour shape of the main reduction shell flange, and the pre-positioning blocks are located outside the local concave contour, for pre-positioning the main reduction shell.

9. The high-efficiency hydraulic tooling for the main reducing shell according to claim 1, characterized in that, The left tailstock and right power tailstock are located on the riser block. By adjusting the height of the riser block, the distance between the bridge plate and the processing table can be adjusted.

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