Automatic die for forklift axle housing machining

Abstract

The utility model discloses an automatic mould for processing a forklift axle housing, which comprises a supporting mechanism, a first positioning mechanism arranged on the supporting mechanism and used for axially positioning an axle housing workpiece, and a second positioning mechanism arranged on the supporting mechanism and used for axially positioning the axle housing workpiece. The second positioning mechanism is used for carrying out radial positioning on an axle housing workpiece, the supporting part is arranged on the supporting mechanism and used for supporting an axle housing when the axle housing workpiece is positioned, and the side pressing mechanism is arranged on the supporting mechanism and used for pressing the side face of the axle housing. According to the automatic mold for forklift axle housing machining, the problems that in the prior art, efficiency is low, machining quality is not stable, and cost is high are solved.

Description

Technical Field

[0001] This utility model relates to the field of forklift manufacturing technology, specifically to an automated mold for processing forklift axle housings. Background Technology

[0002] As a crucial component of the forklift drive axle housing, it plays a vital role in transmitting power, bearing loads, and supporting vehicle movement. Current manufacturing processes for forklift drive axle housings typically involve multiple machining steps, primarily including machining the outer diameter on a lathe, machining the flange faces on a vertical machining center, and machining the brake mounting holes and oil filling holes at both ends using a drilling machine. This machining process requires the workpiece to be transferred, positioned, and clamped multiple times between different machines.

[0003] However, existing processing techniques have the following drawbacks: First, multiple transfers and positioning not only increase processing complexity but also lead to lower production efficiency. Second, frequent workpiece clamping and transfer processes easily introduce processing errors, resulting in unstable processing quality. This instability may affect the final performance of the axle housing, especially when the fitting precision requirements are high. Furthermore, due to the complexity of the processing flow, the overall production cost is relatively high, making it difficult to meet the efficiency and quality requirements of mass production. Therefore, improving processing efficiency, reducing errors in processes, and ensuring processing quality have become pressing issues that need to be addressed in existing technologies. Utility Model Content

[0004] The purpose of this invention is to provide an automated mold for processing forklift axle housings, which solves the problems of low processing efficiency, unstable processing quality and high cost in the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automated mold for processing forklift axle housings, comprising:

[0006] Supporting institutions;

[0007] A first positioning mechanism is mounted on a support mechanism and is used for axial positioning of the axle housing workpiece.

[0008] A second positioning mechanism is mounted on the support mechanism and is used for radial positioning of the bridge housing workpiece.

[0009] A support portion, which is disposed on the support mechanism, is used to support the axle housing when positioning the axle housing workpiece;

[0010] A side clamping mechanism is mounted on the support mechanism and is used for pressing on the side of the axle housing.

[0011] Preferably, the support mechanism includes a base plate, a bridge shell support plate is fixed to the top of the base plate, and a bracket is also fixed to the top of the base plate.

[0012] Preferably, the first positioning mechanism includes an end face clamping cylinder, which is fixed on the axle housing support plate. A first connecting rod is fixed on the end face clamping cylinder, and a pressure rod is connected to the other end of the first connecting rod. A pressure block is fixedly connected to one end of the pressure rod.

[0013] Preferably, the second positioning mechanism includes a clamping cylinder, which is fixed to the axle housing support plate, and a clamping block is fixed on the clamping cylinder.

[0014] Preferably, the support includes a support cylinder, which is fixed on the bracket, and a support pin is fixed on the support cylinder.

[0015] Preferably, the side clamping mechanism includes a mounting transition plate, which is fixed on a bracket. A first hydraulic cylinder and a second hydraulic cylinder are fixed on both sides of the mounting transition plate, and a second connecting rod is fixed on the top of the first and second hydraulic cylinders. A connector is fixed on the second connecting rod.

[0016] Preferably, a water outlet valve block is provided on the top of the bracket, and a water outlet pipe is provided on the water outlet valve block.

[0017] Preferably, a protective cover is provided on the inner side of the bridge housing support plate, and a side support cylinder is provided on the protective cover.

[0018] Preferably, the base plate is further provided with a limit block.

[0019] Preferably, the bracket is further provided with a rotary clamping cylinder, and a correction rod is fixed to the output end of the rotary clamping cylinder.

[0020] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0021] This automated mold for forklift axle housing machining reduces the multiple transfer and repositioning steps required in existing technologies by integrating multiple positioning, support, and clamping mechanisms. The automated mold design allows the workpiece to be positioned and clamped at a single station, avoiding frequent transfers and significantly improving machining efficiency. Furthermore, the automated positioning and clamping system reduces human intervention, making it suitable for mass production and further enhancing overall production efficiency. Through the coordinated action of the first positioning mechanism, the second positioning mechanism, and the support unit, the axle housing maintains stable positioning during machining, reducing workpiece displacement and wobbling, effectively minimizing machining errors and ensuring consistent machining quality. The design of the qualitative, side-clamping mechanism and rotary clamping cylinder ensures that the workpiece is clamped more firmly and accurately during processing, preventing loosening or displacement of the workpiece due to unstable clamping. Through the coordinated operation of multiple hydraulic cylinders, the radial and axial positioning and clamping of the bridge housing workpiece are more precise, reducing the impact of clamping looseness or uneven pressure on processing accuracy. This utility model integrates multiple processing steps, which can significantly reduce the transfer of workpieces between different devices, reduce the frequency of use of processing equipment and the time cost of personnel operation, reduce the need for multiple devices and complex processing procedures, thereby reducing equipment maintenance and labor costs, and solving the problems of low efficiency, unstable processing quality and high cost in the prior art. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0025] Figure 4 This is a schematic diagram of the bridge shell support plate structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the support structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the side clamping mechanism of this utility model at a certain angle;

[0028] Figure 7 This is a schematic diagram of the side clamping mechanism of this utility model from another angle;

[0029] Figure 8 This is a schematic diagram of the fabrication of the bridge shell for the overall structure of this utility model.

[0030] In the diagram: 1. Support mechanism; 101. Base plate; 102. Bridge housing support plate; 103. Bracket; 2. First positioning mechanism; 21. End face clamping cylinder; 22. First connecting rod; 23. Pressure rod; 24. Pressure block; 3. Second positioning mechanism; 31. Clamping cylinder; 32. Clamping block; 4. Support part; 41. Support cylinder; 42. Support pin; 5. Side clamping mechanism; 51. Mounting transition plate; 52. First hydraulic cylinder; 53. Second hydraulic cylinder; 54. Second connecting rod; 55. Connector; 6. Water outlet valve block; 7. Water outlet pipe; 8. Protective cover; 9. Side support cylinder; 10. Limiting block; 11. Rotary clamping cylinder; 12. Correction rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figure 1 and Figure 8 As shown, an automated mold for machining forklift axle housings includes a support mechanism 1, a first positioning mechanism 2, a second positioning mechanism 3, a support part 4, and a side clamping mechanism 5. The support mechanism 1 supports the entire mold structure. The first positioning mechanism 2 is mounted on the support mechanism 1 and its function is to axially position the axle housing workpiece. The second positioning mechanism 3 is also mounted on the support mechanism 1 and is used to radially position the axle housing workpiece. The support part 4 is also mounted on the support mechanism 1 and is mainly used to provide support during the positioning of the axle housing workpiece. The side clamping mechanism 5 is responsible for clamping the sides of the axle housing workpiece to ensure that the workpiece remains stable and does not move during machining.

[0033] This automated mold uses a first positioning mechanism 2 and a second positioning mechanism 3 to position the axle housing workpiece axially and radially, respectively, ensuring accuracy during processing. A support part 4 further supports the workpiece, preventing displacement during positioning. The side clamping mechanism 5 applies pressure to the side of the axle housing workpiece after positioning, keeping it stable and preventing movement or vibration during processing. The coordinated operation of these mechanisms ensures the accuracy and stability of the workpiece during positioning and processing. This automated mold achieves automatic workpiece positioning and clamping, avoiding errors from manual adjustments and improving processing efficiency and accuracy. Simultaneously, the mold's simple structure facilitates maintenance and effectively reduces workpiece displacement during processing, improving product quality and consistency.

[0034] In practical applications, the structures of the support mechanism 1, positioning mechanism 2, and 3 can be adjusted according to different types of forklift axle housings. For example, the specifications of the positioning mechanism or the size of the support part can be changed to adapt to axle housing workpieces of different sizes and shapes. In addition, the clamping method of the side clamping mechanism 5 can also be selected according to different workpiece materials, such as using hydraulic cylinders or mechanical clamps.

[0035] In one possible implementation, the support mechanism 1 includes a base plate 101, with a bridge shell support plate 102 fixed to the top of the base plate 101, and a bracket 103 also fixed to the top of the base plate 101 for overall support of the mold structure. The base plate 101 provides a stable foundation for the entire mold, while the bridge shell support plate 102 is used to place and support the bridge shell workpiece, positioning it in a suitable processing position. The bracket 103 further enhances the structural stability of the mold, ensuring accurate installation and operation of other mechanisms. This structure provides sufficient strength and stability to ensure that the bridge shell workpiece does not experience significant vibration or displacement during processing. Simultaneously, the design of the base plate 101 and the bracket 103 makes the mold structure compact, easy to adjust, and convenient for installation and maintenance.

[0036] The base plate 101 of the support mechanism 1 can be made of different materials, such as steel or aluminum, to reduce weight, depending on the actual working environment. The shape and size of the axle housing support plate 102 can also be adjusted according to the specific dimensions of the axle housing workpiece to adapt to different models of forklift axle housings.

[0037] In one possible implementation, the first positioning mechanism 2 includes an end-face clamping cylinder 21, which is fixed to the axle housing support plate 102. The output end of the end-face clamping cylinder 21 is connected to a first connecting rod 22, and the other end of the first connecting rod 22 is connected to a pressure rod 23. One end of the pressure rod 23 is fixedly connected to a pressure block 24. The end-face clamping cylinder 21 pushes the first connecting rod 22 via a cylinder or hydraulic system, causing the first connecting rod 22 to move the pressure rod 23 forward. The pressure block 24 mounted on the pressure rod 23 clamps the end face of the axle housing workpiece, achieving axial positioning of the workpiece and preventing axial movement during processing. This positioning mechanism can quickly and accurately position the workpiece axially, reducing errors from manual operation and improving processing accuracy and efficiency. Simultaneously, the clamping force of the end-face clamping cylinder 21 can be adjusted to accommodate axle housing workpieces of different sizes and hardness.

[0038] The materials of the first connecting rod 22 and the pressure rod 23 can be selected from lighter or stronger materials according to processing requirements, such as carbon fiber or high-strength alloys, to reduce mold weight or enhance structural strength. The shape and size of the pressure block 24 can also be changed according to the size of the workpiece to ensure good clamping effect.

[0039] In one possible implementation, the second positioning mechanism 3 includes a clamping cylinder 31 fixed to the axle housing support plate 102. A clamping block 32 is fixed to the output end of the clamping cylinder 31. The clamping cylinder 31 controls the movement of the clamping block 32 via a cylinder or hydraulic system. The clamping block 32 clamps the axle housing workpiece radially, thereby achieving radial positioning of the workpiece and preventing radial movement during processing. The clamping cylinder 31 can quickly and stably clamp the workpiece radially, effectively avoiding the instability problem of manual clamping, while improving processing efficiency and accuracy. The clamping force can be adjusted according to the material and size of the workpiece to meet the needs of different workpieces.

[0040] The shape and material of the clamping block 32 can be changed according to different types of bridge housing workpieces. For example, a flexible clamping block can be used to avoid damage to the workpiece surface. The specifications of the clamping cylinder 31 can also be adjusted according to the actual workpiece size to ensure the clamping effect.

[0041] In one possible implementation, the support part 4 includes a support cylinder 41, which is fixed to the bracket 103. A support pin 42 is fixed to the output end of the support cylinder 41 for supporting the axle housing when the workpiece is positioned. The support cylinder 41 controls the extension and retraction of the support pin 42 via a cylinder or hydraulic system. When the axle housing workpiece needs to be positioned, the support cylinder 41 pushes the support pin 42 up to the bottom of the workpiece, supporting it and providing stable support force to prevent vertical displacement of the workpiece during processing. The combination of the support cylinder 41 and the support pin 42 provides stable support for the workpiece, preventing positional displacement due to its own weight or vibrations generated during processing. Simultaneously, the adjustable extension and retraction of the support cylinder allows it to adapt to axle housing workpieces of different sizes, increasing the applicability of the mold.

[0042] The material of the support pin 42 can be selected from different high-strength materials, such as titanium alloy or wear-resistant steel, depending on the weight and material of the axle housing workpiece, to ensure sufficient support strength. The specifications of the support cylinder 41 can also be adjusted according to the height and weight of different workpieces to ensure appropriate support force.

[0043] In one possible implementation, the side clamping mechanism 5 includes a mounting transition plate 51 fixed to a bracket 103. A first hydraulic cylinder 52 and a second hydraulic cylinder 53 are fixed to both sides of the mounting transition plate 51, respectively. A second connecting rod 54 is fixed to the top of the first and second hydraulic cylinders 52 and 53, and a connector 55 is fixed to the second connecting rod 54 for clamping the side of the axle housing workpiece. The first and second hydraulic cylinders 52 and 53 work together through the second connecting rod 54 to push the connector 55 to clamp the side of the workpiece. This clamping action ensures that the workpiece will not move left or right during processing, increasing the workpiece's positioning stability. The side clamping mechanism 5 clamps the workpiece with the coordinated action of the hydraulic cylinders on both sides, ensuring uniform force on the side of the workpiece and avoiding deformation or positional displacement caused by unilateral force. The clamping force of the hydraulic cylinders is adjustable, allowing for flexible adjustment of the clamping effect according to the size and material of different workpieces.

[0044] The first cylinder 52 and the second cylinder 53 can be different types of hydraulic cylinders or pneumatic cylinders, depending on the clamping force and speed requirements during processing. The length and shape of the second connecting rod 54 and the joint 55 can also be adjusted according to the size of the axle housing workpiece to ensure that the clamping mechanism can adapt to different types of workpieces.

[0045] In one possible implementation, a water outlet valve block 6 is provided on the top of the support 103, and a water outlet pipe 7 is provided on the water outlet valve block 6 for providing cooling or cleaning liquid. The water outlet valve block 6 is connected to an external water source through a pipe, and the water outlet pipe 7 controls the flow of liquid for cooling or cleaning the mold or workpiece during processing, preventing overheating or the generation of impurities that could affect processing quality. By setting the water outlet valve block 6 and the water outlet pipe 7, the flow rate of the cooling or cleaning liquid can be effectively controlled, ensuring that the temperature of the mold and workpiece is moderate during processing, reducing processing errors and extending the service life of the mold. At the same time, liquid cleaning can also prevent the accumulation of chips or dust, ensuring processing accuracy.

[0046] The material and diameter of the outlet pipe 7 can be adjusted according to the type and flow requirements of the coolant. For example, corrosion-resistant materials can be used to meet the needs of special coolants. The outlet valve block 6 can also be designed for multi-channel adjustment to control the liquid supply to different parts as needed.

[0047] In one possible implementation, a protective cover 8 is provided on the inner side of the bridge housing support plate 102. A side support cylinder 9 is mounted on the protective cover 8 to provide additional support to the sides of the bridge housing workpiece. The protective cover 8 protects the workpiece from external influences during processing. Simultaneously, the side support cylinder 9 can extend when necessary to support the sides of the bridge housing workpiece, enhancing its stability during processing. The protective cover 8 effectively prevents external interference or debris from entering the workpiece processing area, maintaining the cleanliness of the workpiece and the stability of the processing environment. The side support cylinder 9 provides additional support to the workpiece, preventing it from moving or deforming due to uneven force during side clamping or processing, thus improving processing reliability.

[0048] The shape and material of the protective cover 8 can be customized according to different processing environments. For example, transparent materials can be used to facilitate observation of the processing, or metal covers can be used to enhance the protective effect. The specifications and extension range of the side support cylinder 9 can also be adjusted according to the size of the axle housing workpiece to ensure adaptability.

[0049] In one possible implementation, a limiting block 10 is further provided on the base plate 101 to restrict the movement of the workpiece on the base plate. The limiting block 10 is mounted on the base plate 101 and restricts the range of movement of the workpiece on the base plate through physical contact, ensuring that the workpiece is fixed in an accurate position before processing. The limiting block 10 effectively prevents irregular movement of the workpiece during processing through a simple mechanical means, thereby improving processing accuracy. Its design is simple, durable, and easy to replace, and it can adapt to workpieces of different sizes.

[0050] The limiting block 10 can be replaced or adjusted according to different workpiece shapes and sizes. For example, an adjustable limiting block can be used to adapt to bridge housing workpieces of different specifications, increasing the adaptability of the mold.

[0051] In one possible implementation, the bracket 103 is further equipped with a rotary clamping cylinder 11. A correction rod 12 is fixed to the output end of the rotary clamping cylinder 11 for rotating and clamping the workpiece. Through the correction rod 12 at its output end, the rotary clamping cylinder 11 can precisely rotate and adjust the position of the workpiece before processing, ensuring the workpiece is at the optimal processing angle. Then, the workpiece is fixed by the clamping function. The rotary clamping cylinder 11 allows for flexible angle adjustment of the workpiece according to processing requirements, greatly improving processing flexibility and accuracy. The clamping function of the correction rod 12 further ensures the stability of the workpiece, preventing it from rotating or shifting during processing.

[0052] The specifications of the rotary clamping cylinder 11 can be adjusted according to the weight of the workpiece and the required rotation angle to ensure the smoothness and accuracy of the rotation operation. The length and shape of the correction rod 12 can also be changed according to the size and shape of the workpiece to better adapt to different types of bridge housing workpieces.

[0053] Working Process: The entire mold is securely connected to the horizontal machining table via the base plate 101, ensuring the stability and accuracy of the mold during operation. At the start of work, all cylinder piston rods on the mold are in their initial retracted state, and the alignment rod 12 is in a horizontal position, ready to receive the workpiece. The robot grips the bridge housing and precisely places it on the bridge housing support plate 102 of the mold. Because the support pin 42 is in the raised position, the flange face of the bridge housing remains essentially vertical. Once the bridge housing is correctly placed inside the mold, the end face clamping cylinder 21 activates, pushing the first connecting rod 22 to drive the pressure rod 23 and pressure block 24, applying pressure to the other end of the bridge housing, causing it to gradually approach the limiting block 10. After the bridge housing contacts the limiting block 10, its axial positioning is completed. Immediately afterwards, the rotating clamping cylinder 11 and the alignment rod 12 are activated. Simultaneously, the support cylinder 41 and the side support cylinder 9 also work synchronously. The alignment rod 12 rotates and adjusts the bridge housing, correcting the machined surface to an ideal vertical position. During this process, the support cylinder 41 provides stable support to the bottom of the bridge housing via the support pin 42, ensuring that the bridge housing does not tilt or shift during posture adjustment. The side support cylinder 9 further supports the sides of the bridge housing to prevent lateral movement. After posture adjustment is completed, the clamping cylinder 31 starts working, pushing the clamping block 32 to radially clamp the outer side of the bridge housing, ensuring that the workpiece remains stable and does not move throughout the entire processing. At this point, the axial, radial, and posture of the bridge housing have been accurately positioned. After the workpiece is clamped and stabilized, the robot releases its gripper, and then the machine door closes, beginning the machining operation on the bridge housing. During machining, the rotary clamping cylinder 11 and the alignment rod 12 maintain the bridge housing's posture, ensuring that the machined surface remains vertical. The support cylinder 41 and the side support cylinder 9 continuously provide support to the workpiece. After machining is completed, the water outlet pipe 7 on the water outlet valve block 6 is activated, spraying cutting fluid to clean the mold and bridge housing. The cutting fluid is sprayed onto the machined surface of the bridge housing workpiece to remove the iron filings generated during cutting, ensuring that the workpiece surface and mold remain clean and preventing the accumulation of iron filings from affecting subsequent processing.

[0054] After cleaning, the machine tool's front door opens, and the robot re-enters the work area to grasp the machined bridge housing workpiece. During the grasping process, the clamping cylinder 31 and the end face clamping cylinder 21 gradually loosen, releasing the axial and radial constraints on the workpiece. Simultaneously, the support cylinder 41 and the side support cylinder 9 also gradually retract, completely releasing the support for the bridge housing. After the robot grasps and removes the machined bridge housing, it places a new workpiece into the mold and begins the next processing cycle. The mold then automatically enters the positioning, posture adjustment, clamping, and processing process again.

[0055] By adjusting the stroke of the support cylinder 41 and clamping cylinder 31, the height of the support pin 42, and the distance of the limit block 10, the mold can adapt to bridge housing workpieces of different sizes, increasing processing flexibility. An automatic lubrication system can be integrated on the water outlet valve block 6 to lubricate the key parts of the mold after cleaning, ensuring the long-term operation of each component of the mold. By integrating sensors, the correct positioning and clamping of the bridge housing can be detected, ensuring that the workpiece is in an ideal state before each processing and timely feedback to the control system, realizing a more intelligent automated processing flow. In this way, the entire automated mold processing process achieves efficient and accurate workpiece positioning and processing, effectively improving production efficiency and processing quality.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated mold for machining forklift axle housings, characterized in that, include: Supporting structure (1); A first positioning mechanism (2) is provided on the support mechanism (1) and is used to axially position the bridge housing workpiece. The second positioning mechanism (3) is mounted on the support mechanism (1) and is used for radial positioning of the bridge housing workpiece. Support (4), which is disposed on the support mechanism (1), is used to support the bridge housing when positioning the bridge housing workpiece; Side clamping mechanism (5) is provided on the support mechanism (1) and is used for the press on the side of the bridge housing.

2. The automated mold for processing forklift axle housings according to claim 1, characterized in that: The support mechanism (1) includes a base plate (101), a bridge shell support plate (102) is fixed on the top of the base plate (101), and a bracket (103) is also fixed on the top of the base plate (101).

3. An automated mold for processing forklift axle housings according to claim 2, characterized in that: The first positioning mechanism (2) includes an end face clamping cylinder (21), which is fixed on the bridge housing support plate (102). A first connecting rod (22) is fixed on the end face clamping cylinder (21), and a pressure rod (23) is connected to the other end of the first connecting rod (22). A pressure block (24) is fixedly connected to one end of the pressure rod (23).

4. An automated mold for processing forklift axle housings according to claim 2, characterized in that: The second positioning mechanism (3) includes a clamping cylinder (31), which is fixed on the bridge housing support plate (102), and a clamping block (32) is fixed on the clamping cylinder (31).

5. An automated mold for processing forklift axle housings according to claim 2, characterized in that: The support part (4) includes a support cylinder (41), which is fixed on the bracket (103) and a support nail (42) is fixed on the support cylinder (41).

6. An automated mold for processing forklift axle housings according to claim 2, characterized in that: The side clamping mechanism (5) includes a mounting transition plate (51), which is fixed on the bracket (103). A first oil cylinder (52) and a second oil cylinder (53) are fixed on both sides of the mounting transition plate (51). A second connecting rod (54) is also fixed on the top of the first oil cylinder (52) and the second oil cylinder (53). A connector (55) is fixed on the second connecting rod (54).

7. An automated mold for processing forklift axle housings according to claim 3, characterized in that: The top of the bracket (103) is provided with a water outlet valve block (6), and a water outlet pipe (7) is provided on the water outlet valve block (6).

8. An automated mold for processing forklift axle housings according to claim 2, characterized in that: The bridge housing support plate (102) is provided with a protective cover (8) on its inner side, and a side support cylinder (9) is provided on the protective cover (8).

9. An automated mold for processing forklift axle housings according to claim 2, characterized in that: A limit block (10) is also provided on the base plate (101).

10. An automated mold for processing forklift axle housings according to claim 2, characterized in that: The bracket (103) is also provided with a rotary clamping cylinder (11), and a correction rod (12) is fixed at the output end of the rotary clamping cylinder (11).

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