A clamping and positioning tool for tube plate milling

Abstract

The utility model discloses a kind of clamping and positioning tool for tube plate milling, comprising: operation platform, and the positioning assembly and clamping assembly are slidably arranged in the middle part of operation platform along the periphery of operation platform;At least one slab is provided in the middle part of operation platform;The positioning assembly includes several positioning mechanisms arranged along the periphery of slab on operation platform;The clamping assembly includes several clamping mechanisms arranged along the periphery of slab on operation platform and adjacent to several positioning mechanisms.The tool is automatically operated by positioning assembly and clamping assembly, and several positioning mechanisms successively push slab, so that it is flush in length and width direction, and several clamping mechanisms are used to clamp and compress the top of slab after alignment, without stopping adjustment when switching processing side, greatly shorten the time required for clamping and positioning when switching processing side, reduce the processing error of re-adjusting slab clamping and positioning, so as to ensure the processing efficiency and processing quality of slab.

Description

Technical Field

[0001] This utility model belongs to the field of tube sheet blank processing technology, specifically a clamping and positioning tool for tube sheet milling. Background Technology

[0002] Tube sheet blanks are important blanks for mechanical parts. The tube sheets formed after processing are widely used in many industrial fields. The processing steps of tube sheet blanks are relatively complex, including milling around the perimeter, drilling and milling holes, milling threads, chamfering, etc. Before processing, the blanks need to be clamped and positioned. Different clamping and positioning points need to be switched according to different processing steps to ensure the stability of the tube sheet blanks during processing.

[0003] Chinese patent CN217942571U discloses a clamping and positioning device for processing color steel sheets. This device vertically places the color steel sheet between two clamping plates, and a drive assembly moves the two clamping plates closer together or further apart, thus clamping and fixing or releasing the color steel sheet. After clamping and fixing the color steel sheet, an adjusting rod moves downwards along the height of a support rod, causing the contact plate at the end of the adjusting rod to move towards one side of the color steel sheet. The contact plate then abuts against the top of the color steel sheet, thus securing it in a stable position. However, when switching the processing side of the slab, this device requires stopping the machine to re-clamp and reposition the slab, resulting in compromised processing accuracy and quality. Furthermore, stopping to adjust the clamping and positioning of the slab is time-consuming and labor-intensive, leading to low processing efficiency.

[0004] Therefore, there is an urgent need for a clamping and positioning fixture for tube sheet milling that eliminates the need to stop and adjust when switching machining sides, greatly shortens the time required for clamping and positioning when switching machining sides, reduces the machining error caused by readjusting the blank clamping and positioning, and improves machining accuracy, thereby ensuring the machining efficiency and quality of the blank. Utility Model Content

[0005] The purpose of this utility model is to provide a clamping and positioning fixture for tube sheet milling, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A clamping and positioning fixture for tube sheet milling includes: The operating platform is equipped with positioning components and clamping components that are slidably disposed around the periphery of the operating platform toward the center of the operating platform. At least one slab is provided in the middle of the operating platform; The positioning component includes several positioning mechanisms arranged on the operating platform along the periphery of the slab. The clamping assembly includes several clamping mechanisms arranged on the operating platform along the periphery of the slab and adjacent to several positioning mechanisms. The positioning mechanisms and clamping mechanisms described herein can be switched to clamp and position the slab.

[0007] The clamping and positioning fixture for tube sheet milling according to the present invention has at least the following technical effects: This clamping and positioning fixture for tube sheet milling can quickly position and clamp the slab through the automated operation of the positioning and clamping components. Several positioning mechanisms push the slab sequentially to make it flush in the length and width directions, while several clamping mechanisms clamp and press the top of the flushed slab. By retracting several positioning and clamping mechanisms on the machining side, it is possible to quickly switch between different machining positions, which facilitates milling of different positions on the slab by the milling cutter. There is no need to stop the machine for adjustment when switching machining sides, which greatly shortens the time required for clamping and positioning when switching machining sides, reduces the machining error caused by readjusting the slab clamping and positioning, and improves machining accuracy, thereby ensuring the machining efficiency and quality of the slab.

[0008] As a further embodiment of this utility model: a plurality of slide rails are arranged around the perimeter of the operating platform toward the center, and sliders are respectively provided at the bottom of the plurality of positioning mechanisms and the plurality of clamping mechanisms, and the plurality of positioning mechanisms and the plurality of clamping mechanisms slide on the slide rails by means of the sliders.

[0009] Because several slide rails are set around the perimeter of the operating platform towards the center, and several positioning mechanisms and several clamping mechanisms are respectively equipped with sliders at their bottoms, the positioning mechanisms and several clamping mechanisms slide on the slide rails via the sliders; the slide rails provide a precise linear motion path for the positioning mechanisms and clamping mechanisms, and when the sliders slide on the slide rails, they can ensure the straightness and stability of the motion, so that the slab always maintains an accurate position during the processing, thereby reducing processing errors and improving product quality.

[0010] As a further embodiment of this utility model: the positioning mechanism includes a first positioning block, a second positioning block, a third positioning block, a fourth positioning block arranged on both sides along the length direction of the operating platform, and a fifth positioning block and a sixth positioning block arranged on both sides along the width direction of the operating platform.

[0011] As a further embodiment of this utility model, a pusher block is provided at one end of each of the positioning blocks near the slab.

[0012] As a further embodiment of the present invention: the clamping mechanism includes a first clamping arm, a second clamping arm, a third clamping arm, a fourth clamping arm arranged on both sides along the length direction of the operating platform, and a fifth clamping arm, a sixth clamping arm, a seventh clamping arm, and an eighth clamping arm arranged on both sides along the width direction of the operating platform.

[0013] The positioning mechanisms include a first positioning block, a second positioning block, a third positioning block, a fourth positioning block, and a fifth positioning block and a sixth positioning block, which are arranged on both sides along the length of the operating platform and on both sides along the width of the operating platform; each of the positioning blocks has a push block at one end near the slab; and the clamping mechanisms include a first clamping arm, a second clamping arm, a third clamping arm, a fourth clamping arm, and a fifth clamping arm, a sixth clamping arm, a seventh clamping arm, and an eighth clamping arm, which are arranged on both sides along the length of the operating platform and on both sides along the width of the operating platform.

[0014] When several slabs need to be processed, the first, second, and sixth positioning blocks are slidable to push the slabs, pre-positioning one or both sides of each slab. Then, the third, fourth, and fifth positioning blocks are slidable to push the slabs further, positioning them in four directions to ensure they are flush in both length and width. At this point, the first, second, third, fourth, fifth, and sixth clamping arms clamp and press the slabs together, while the first, second, third, fourth, fifth, and sixth positioning blocks... The blocks are all retracted to their original positions, and one side of the slab is milled using a milling cutter. After that side is machined, the seventh and eighth clamping arms clamp and press the slab tightly, and the first and second clamping arms are retracted to their original positions to mill the other side of the slab. After that side is machined, the first and second clamping arms clamp and press the slab tightly again, and the third and fourth clamping arms are retracted to their original positions to mill the other side of the slab. After that side is machined, the third and fourth clamping arms clamp and press the slab tightly again, and the fifth and sixth clamping arms are retracted to their original positions to mill the other side of the slab, thus completing the milling operation on all four sides of the slab.

[0015] This fixture enables the slab to be positioned in stages using several positioning mechanisms, gradually aligning several slabs in both length and width directions, effectively reducing positioning errors and improving positioning accuracy. Furthermore, several clamping mechanisms work together at different processing stages to clamp and press the slab, providing a more uniform and stable clamping force, ensuring that the slab does not shift or wobble during milling, reducing processing errors caused by slab movement and improving processing precision. During processing, the positioning and clamping mechanisms on the processing side are all in a retracted state, avoiding interference with the milling cutter and ensuring reliability and smoothness during processing.

[0016] As a further embodiment of this utility model: several clamping arms are respectively provided with a rotary lifting device, and a rotary lifting rod is provided on the top of the rotary lifting device.

[0017] As a further embodiment of this utility model: a connecting rod is provided at the top of the rotating lifting rod, and a pressure rod is provided at the bottom of the free end of the connecting rod.

[0018] By setting a rotary lifting device on each of the clamping arms, and a rotary lifting rod at the top of the rotary lifting device; a connecting rod at the top of the rotary lifting rod, and a pressure rod at the bottom of the free end of the connecting rod; when the clamping arms slide close to the side of the slab, the rotary lifting device drives the rotary lifting rod to rise and rotate, causing the connecting rod to rotate to the top of the slab, and then drives the rotary lifting rod to fall, so that the pressure rod at the bottom of the free end of the connecting rod clamps and presses it against the top of the slab, thereby achieving clamping and pressing of the slab; when processing this side of the slab, it is only necessary to drive the rotary lifting rod to rise and rotate 90° by the rotary lifting device to drive the connecting rod away from the outside of the slab, avoiding interference with the milling cutter.

[0019] As a further embodiment of this utility model, a first rubber pad is provided on the side of the pusher block closest to the slab.

[0020] Because the pusher block is equipped with a first rubber pad on the side closest to the slab, during the positioning process of each positioning block on the slab, the pusher block needs to contact the side wall of the slab and apply a certain pushing force. The rubber pad can play a role in buffering and isolating, preventing the pusher block from directly scratching or damaging the side wall of the slab, ensuring the integrity and smoothness of the side wall of the slab, thereby ensuring the quality of the slab.

[0021] As a further improvement of this utility model, a second rubber pad is provided at the bottom of the pressure rod.

[0022] Because a second rubber pad is provided at the bottom of the pressure bar, during the clamping and pressing process of the pressure bar on the slab, the bottom of the pressure bar needs to contact the top surface of the slab and apply a certain pressure. The rubber pad can play a role in buffering and isolating, avoiding the bottom of the pressure bar from producing indentations or scratches on the top surface of the slab, ensuring the integrity and smoothness of the top surface of the slab, thereby ensuring the quality of the slab.

[0023] As a further embodiment of this utility model, the number of slabs set in the middle of the operating platform is 1 to 3.

[0024] Since the number of slabs set in the middle of the operating platform is 1 to 3, the tooling can clamp and position multiple slabs at the same time, thereby performing multiple processing steps on the slabs, which greatly improves the slab processing efficiency and ensures the accuracy of processing multiple slabs at the same time, meeting the needs of processing large batches of slabs in multiple processes. Attached Figure Description

[0025] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 A schematic diagram of a three-dimensional structure of a clamping and positioning fixture for tube sheet milling; Figure 2 A top view schematic diagram of a clamping and positioning fixture for tube sheet milling; Figure 3 for Figure 1 A magnified view of part A.

[0027] Figure label: 1. Operating platform; 101. Slide rail; 2. Positioning assembly; 201. First positioning block; 202. Second positioning block; 203. Third positioning block; 204. Fourth positioning block; 205. Fifth positioning block; 206. Sixth positioning block; 207. Push block; 3. Clamping assembly; 301. First clamping arm; 302. Second clamping arm; 303. Third clamping arm; 304. Fourth clamping arm; 305. Fifth clamping arm; 306. Sixth clamping arm; 307. Seventh clamping arm; 308. Eighth clamping arm; 309. Rotary lifting device; 310. Rotary lifting rod; 311. Connecting rod; 312. Pressure rod; 4. Slab. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] like Figure 1 and Figure 2 The present invention provides a clamping and positioning fixture for tube sheet milling, comprising: an operating platform 1, a positioning component 2 and a clamping component 3 slidably disposed along the periphery of the operating platform 1 toward the center of the operating platform 1; at least one blank 4 is disposed in the center of the operating platform 1; the positioning component 2 includes a plurality of positioning mechanisms disposed along the periphery of the blank 4 on the operating platform 1; the clamping component 3 includes a plurality of clamping mechanisms disposed along the periphery of the blank 4 on the operating platform 1 and adjacent to the plurality of positioning mechanisms.

[0035] In use, when several slab blanks 4 need to be clamped and positioned for machining, the slab blanks 4 are placed in the middle of the operating platform 1. Several positioning mechanisms in four directions of the operating platform 1 push the slab blanks 4 one after another, so that the several slab blanks 4 are flush in both length and width directions. At the same time, several clamping mechanisms clamp and press the top of the slab blanks 4 after they are flush. At this time, several positioning mechanisms and several clamping mechanisms on the machining side retract to their original positions to prevent interference with the milling cutter. The milling cutter then mills that side of the slab blank 4. After one side of the slab blank 4 is milled, several positioning mechanisms and several clamping mechanisms that have retracted to their original positions clamp and position the side and top of the slab blank 4 again. Several positioning mechanisms and several clamping mechanisms on the other machining side retract to their original positions. In this way, the clamping, positioning and retraction of several positioning mechanisms and several clamping mechanisms are controlled according to different machining positions to achieve machining of different positions of the slab blank.

[0036] Specifically, this clamping and positioning fixture for tube sheet milling can quickly position and clamp the blank 4 through the automated operation of the positioning component 2 and the clamping component 3. Several positioning mechanisms push the blank 4 sequentially to make it flush in the length and width directions. At the same time, several clamping mechanisms clamp and press the top of the flushed blank 4. By retracting several positioning mechanisms and several clamping mechanisms on the machining side, it is possible to quickly switch between different machining positions, which is convenient for the milling cutter to mill different positions of the blank 4. There is no need to stop the machine for adjustment when switching machining sides, which greatly shortens the time required for clamping and positioning when switching machining sides, reduces the machining error of reading the blank clamping and positioning, and improves the machining accuracy, thereby ensuring the machining efficiency and machining quality of the blank.

[0037] Furthermore, such as Figure 1 As shown, several slide rails 101 are arranged around the perimeter of the operating platform 1 towards the center. Several positioning mechanisms and several clamping mechanisms are respectively provided with sliders at their bottoms. The positioning mechanisms and several clamping mechanisms slide on the slide rails 101 via the sliders.

[0038] Specifically, since several slide rails 101 are arranged around the perimeter of the operating platform 2 towards the center, and several positioning mechanisms and several clamping mechanisms are respectively provided with sliders at their bottoms, the positioning mechanisms and several clamping mechanisms slide on the slide rails 101 via the sliders; the slide rails 101 provide a precise linear motion path for the positioning mechanisms and clamping mechanisms, and when the sliders slide on the slide rails 101, the linearity and stability of the motion can be guaranteed, so that the blank 4 always maintains an accurate position during the processing, thereby reducing processing errors and improving product quality.

[0039] Furthermore, such as Figure 1 and Figure 2 As shown, the positioning mechanisms include a first positioning block 201, a second positioning block 202, a third positioning block 203, a fourth positioning block 204 arranged on both sides along the length of the operating platform 1, and a fifth positioning block 205 and a sixth positioning block 206 arranged on both sides along the width of the operating platform 1; a push block 207 is respectively provided at one end of the positioning blocks near the blank 4; the clamping mechanisms include a first clamping arm 301, a second clamping arm 302, a third clamping arm 303, a fourth clamping arm 304 arranged on both sides along the length of the operating platform 1, and a fifth clamping arm 305, a sixth clamping arm 306, a seventh clamping arm 307 and an eighth clamping arm 308 arranged on both sides along the width of the operating platform 1.

[0040] In use, when several slab blanks 4 need to be processed, the sliding first positioning block 201, the second positioning block 202, and the sixth positioning block 206 push the several slab blanks 4 to pre-position one or both sides of the several slab blanks 4. At this time, the sliding third positioning block 203, the fourth positioning block 204, and the fifth positioning block 205 push the several slab blanks 4 to position the several slab blanks 4 in four directions, so that the several slab blanks 4 are flush in both length and width directions. At this time, the first clamping arm 301, the second clamping arm 302, the third clamping arm 303, the fourth clamping arm 304, the fifth clamping arm 305, and the sixth clamping arm 306 clamp and press the slab blanks 4, and the first positioning block 201, the second positioning block 202, the third positioning block 203, the fourth positioning block 204, and the fifth positioning block 206... Both 05 and the sixth positioning block 206 retract to their original positions, and the milling cutter mills one side of the blank 4. After machining this side, the seventh clamping arm 307 and the eighth clamping arm 308 clamp and press the blank 4, and the first clamping arm 301 and the second clamping arm 302 retract to their original positions to mill the other side of the blank 4. After machining this side, the first clamping arm 301 and the second clamping arm 302 clamp and press the blank 4 again, and the third clamping arm 303 and the fourth clamping arm 304 retract to their original positions to mill the other side of the blank 4. After machining this side, the third clamping arm 303 and the fourth clamping arm 304 clamp and press the blank 4 again, and the fifth clamping arm 305 and the sixth clamping arm 306 retract to their original positions to mill the other side of the blank 4, thereby completing the milling operation on all four sides of the blank 4.

[0041] Specifically, this fixture enables the slab 4 to be positioned in stages through several positioning mechanisms, gradually aligning several slabs 4 in both length and width directions, effectively reducing positioning errors and improving positioning accuracy. Furthermore, several clamping mechanisms work together at different processing stages to clamp and press the slab 4, providing a more uniform and stable clamping force, ensuring that the slab 4 does not shift or wobble during milling, reducing processing errors caused by the movement of the slab 4, and improving processing precision. Moreover, during processing, the positioning mechanisms and clamping mechanisms on the processing side are all in a retracted state, avoiding interference with the milling cutter and ensuring the reliability and smoothness of processing.

[0042] Furthermore, such as Figure 3 As shown, several clamping arms are respectively equipped with a rotary lifting device 309, and a rotary lifting rod 310 is provided on the top of the rotary lifting device 309; a connecting rod 311 is provided on the top of the rotary lifting rod 310, and a pressure rod 312 is provided at the bottom of the free end of the connecting rod 311.

[0043] Specifically, a rotary lifting device 309 is provided on each of the clamping arms. A rotary lifting rod 310 is provided on the top of the rotary lifting device 309. A connecting rod 311 is provided on the top of the rotary lifting rod 310, and a pressure rod 312 is provided at the bottom of the free end of the connecting rod. When the clamping arms slide close to the side of the slab, the rotary lifting device 309 drives the rotary lifting rod 310 to rise and rotate, causing the connecting rod 311 to rotate to the upper part of the slab 4. Then, the rotary lifting device 309 drives the rotary lifting rod 310 to fall, so that the pressure rod 312 at the bottom of the free end of the connecting rod 311 clamps and presses it on the top of the slab 4, thereby achieving clamping and pressing of the slab 4. When processing this side of the slab 4, it is only necessary to drive the rotary lifting rod 310 to rise and rotate 90° by the rotary lifting device 309 to drive the connecting rod 311 away from the outside of the slab 4, avoiding interference with the milling cutter.

[0044] Furthermore, a first rubber pad is provided on the side of the pusher block 207 near the slab 4.

[0045] Specifically, since the push block 207 is provided with a first rubber pad on the side close to the slab 4, during the positioning process of each positioning block on the slab 4, the push block 207 needs to contact the side wall of the slab 4 and apply a certain pushing force. The rubber pad can play a buffering and isolation role, preventing the push block 207 from directly scratching or hitting the side wall of the slab 4, ensuring the integrity and smoothness of the side wall of the slab 4, thereby ensuring the quality of the slab 4.

[0046] Furthermore, a second rubber pad is provided at the bottom of the pressure rod 312.

[0047] Specifically, since a second rubber pad is provided at the bottom of the pressure rod 312, during the clamping and pressing process of the pressure rod 312 on the slab 4, the bottom of the pressure rod 312 needs to contact the top surface of the slab 4 and apply a certain pressure. The rubber pad can play a role in buffering and isolation, avoiding the bottom of the pressure rod 312 from making indentations on the top surface of the slab, ensuring the integrity and smoothness of the top surface of the slab 4, thereby ensuring the quality of the slab 4.

[0048] According to an embodiment of the present invention, the number of slabs 4 in the middle of the operating platform 1 is 1 to 3.

[0049] Specifically, since the number of slab blanks 4 set in the middle of the operating platform 1 is 1 to 3, the tooling can clamp and position multiple slab blanks 4 at the same time, thereby performing multiple processing steps on the slab blanks 4, which greatly improves the slab blank processing efficiency, while ensuring the accuracy of processing multiple slab blanks 4 at the same time, and meeting the needs of processing large batches of slab blanks 4 in multiple processes.

[0050] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A clamping and positioning fixture for tube sheet milling, characterized in that, include: The operating platform is equipped with positioning components and clamping components that are slidably disposed around the periphery of the operating platform toward the center of the operating platform. At least one slab is provided in the middle of the operating platform; The positioning component includes several positioning mechanisms arranged on the operating platform along the periphery of the slab. The clamping assembly includes several clamping mechanisms arranged on the operating platform along the periphery of the slab and adjacent to several positioning mechanisms. The positioning mechanisms and clamping mechanisms described herein can be switched to clamp and position the slab.

2. The clamping and positioning fixture for tube sheet milling according to claim 1, characterized in that, Several slide rails are arranged around the perimeter of the operating platform toward the center. Each of the positioning mechanisms and clamping mechanisms has a slider at its bottom. The positioning mechanisms and clamping mechanisms slide on the slide rails via the sliders.

3. The clamping and positioning fixture for tube sheet milling according to claim 2, characterized in that, The positioning mechanism includes a first positioning block, a second positioning block, a third positioning block, a fourth positioning block arranged on both sides along the length of the operating platform, and a fifth positioning block and a sixth positioning block arranged on both sides along the width of the operating platform.

4. The clamping and positioning fixture for tube sheet milling according to claim 3, characterized in that, Each of the aforementioned positioning blocks has a pusher block at one end near the slab.

5. The clamping and positioning fixture for tube sheet milling according to claim 4, characterized in that, The clamping mechanisms include a first clamping arm, a second clamping arm, a third clamping arm, a fourth clamping arm arranged on both sides along the length of the operating platform, and a fifth clamping arm, a sixth clamping arm, a seventh clamping arm, and an eighth clamping arm arranged on both sides along the width of the operating platform.

6. The clamping and positioning fixture for tube sheet milling according to claim 5, characterized in that, Several clamping arms are each equipped with a rotary lifting device, and the rotary lifting device is equipped with a rotary lifting rod at the top.

7. The clamping and positioning fixture for tube sheet milling according to claim 6, characterized in that, The top of the rotating lifting rod is provided with a connecting rod, and the bottom of the free end of the connecting rod is provided with a pressure rod.

8. The clamping and positioning fixture for tube sheet milling according to claim 7, characterized in that, The pusher block has a first rubber pad on the side closest to the slab.

9. The clamping and positioning fixture for tube sheet milling according to claim 8, characterized in that, A second rubber pad is provided at the bottom of the pressure rod.

10. The clamping and positioning fixture for tube sheet milling according to any one of claims 1 to 9, characterized in that, The number of slabs set in the middle of the operating platform is 1 to 3.

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