On-machine measuring equipment suitable for large-scale deep blind hole machining

Abstract

The utility model discloses on-machine measuring equipment suitable for large-scale deep blind hole processing, which belongs to the field of processing equipment, and is characterized in that a measuring assembly is arranged aiming at a cutter bar, and the inner diameter of a corresponding measuring point of a large-scale deep blind hole in the opposite direction is respectively measured by utilizing the combined arrangement of a measuring ball module and a point light source module, so that the inner diameter measured value of the measuring point is obtained; and on-machine measurement of the inner diameter of the large-scale deep blind hole is realized. The on-machine measuring equipment suitable for large-scale deep blind hole machining is simple in structure and convenient to operate, an existing machine tool structure can be effectively utilized, on-machine measurement of a large-blind-hole workpiece can be achieved only by simply transforming the existing machine tool structure, secondary clamping and positioning of the workpiece caused by measurement are avoided, and the working efficiency is improved. The precision and efficiency of inner diameter measurement in the machining process of the large-scale deep blind hole workpiece are improved, guarantee is provided for the final finish machining efficiency and precision of the workpiece, the machining cost and application cost of the large-scale deep blind hole workpiece are reduced, and good economic value and practical value are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of processing equipment, and in particular relates to an on-machine measuring device suitable for processing large deep blind holes. Background Art

[0002] In the field of mechanical processing technology, the processing of workpieces with large deep blind holes is often encountered. When processing the above workpieces, in order to ensure that the processing accuracy of the large deep blind holes meets the requirements of the actual design, it is necessary to strictly ensure the clamping accuracy during the workpiece processing.

[0003] However, in the actual processing, operators found that it was difficult to ensure the clamping accuracy of large workpieces, and it was difficult to ensure the unity of the workpiece spindle and the processing Z axis. The deflection between the two often exceeded 0.1mm. As the length of the workpiece increases, the offset between the workpiece spindle and the processing Z axis will become larger and larger, resulting in further increase in processing errors, making the workpiece processing unable to meet the needs of actual applications, and there are huge processing defects. Utility Model Content

[0004] In response to one or more of the above defects or improvement needs in the prior art, the utility model provides an on-machine measuring device suitable for large deep blind hole processing, which can realize on-machine measurement of the workpiece after processing while meeting the large deep blind hole processing needs of the workpiece, thereby ensuring the accuracy of workpiece measurement and improving the efficiency of measuring large deep blind hole workpieces.

[0005] To achieve the above-mentioned purpose, the utility model provides an on-machine measuring device suitable for large deep blind hole processing, comprising a chuck for clamping one end of a workpiece and a center frame for clamping the other end of the workpiece, and a displacement processing assembly for driving a tool bar to reciprocate in an XZ plane is arranged at one end of the center frame away from the chuck;

[0006] A measuring component is also provided corresponding to the tool rod;

[0007] The measuring assembly includes a measuring ball module that can be assembled on a tool handle connected to the end of the tool rod and a point light source module arranged on the outer peripheral wall surface of the end of the tool rod; and the measuring ball module assembled on the tool handle is located on the side of the tool rod axis away from the point light source module.

[0008] As a further improvement of the present invention, the measuring ball module assembled on the tool handle and the point light source module are located in the same XZ plane passing through the tool rod axis.

[0009] As a further improvement of the present utility model, the point light source module includes a point light source, a sealing cover plate and a driving component;

[0010] The point light source and the driving assembly are respectively embedded in the holes formed at the end of the tool shank; and the sealing cover plate is assembled with the driving assembly, so as to change the position of the sealing cover plate through the driving assembly, so that the sealing cover plate can seal the point light source in the corresponding hole when the point light source is not working, and release the sealing of the point light source when the point light source is working.

[0011] As a further improvement of the present utility model, the driving assembly includes a sliding pin, a spiral groove disk and a control motor;

[0012] The sliding pin is connected to one end of the sealing cover plate, and is assembled with the spiral groove disk, and the spiral groove disk is connected to the output end of the control motor, so that the control motor can drive the sealing cover plate to reciprocate in translation through the spiral groove disk.

[0013] As a further improvement of the present utility model, the steady rest includes an annular bracket and at least three acting units arranged at intervals along the circumferential direction on the annular bracket;

[0014] The at least three acting units can respectively reciprocate in the radial direction of the annular bracket to abut against at least three points on the outer circumference of the workpiece.

[0015] As a further improvement of the present utility model, there are three acting units, which include a pressing unit located at the top of the annular bracket and two supporting units located on both sides of the annular bracket; the two supporting units can respectively abut against the two side wall surfaces of the workpiece, and the pressing unit can abut against the top of the workpiece and press the workpiece on the two supporting units.

[0016] As a further improvement of the present utility model, the pressing part of the pressing unit is connected to a telescopic mechanism driven by a cylinder or a hydraulic cylinder;

[0017] and / or

[0018] The supporting part of the supporting unit is connected to a lead screw structure driven by a servo motor.

[0019] As a further improvement of the present utility model, the bottom of the steady rest is assembled on the guide rail extending along the Z-axis in the displacement processing assembly and can reciprocate in the Z-axis direction under the guidance of the guide rail.

[0020] As a further improvement of the present utility model, the displacement processing assembly includes a tool shank seat and a carriage corresponding to the guide rail;

[0021] The tool shank passes through the tool shank seat; the bottom of the tool shank seat is connected to the carriage, the bottom of the carriage is provided with an X-axis displacement mechanism, and a Z-axis sliding mechanism is arranged between the X-axis displacement mechanism and the guide rail.

[0022] As long as the above - mentioned improved technical features do not conflict with each other, they can be combined with each other.

[0023] Generally speaking, compared with the prior art, the beneficial effects of the above - mentioned technical solutions conceived by the present utility model include:

[0024] (1) The in - machine measuring device applicable to the processing of large - depth blind holes of the present utility model is obtained by simply modifying the existing machine tool. A measuring component is set for the tool shank. By using the combined setting of the measuring ball module and the point - light - source module in the measuring component, the inner - diameter measurement in the opposite directions of the corresponding measuring points of the large - depth blind hole is respectively carried out, and then the inner - diameter measurement value of the measuring point is obtained, effectively realizing the in - machine measurement of the inner diameter of the large - depth blind hole, ensuring the accuracy of the inner - diameter measurement during the processing of large - depth blind - hole workpieces, improving the convenience and efficiency of the inner - diameter measurement, and providing guarantee for the processing accuracy of the workpieces.

[0025] (2) The in - machine measuring device applicable to the processing of large - depth blind holes of the present utility model effectively ensures the reliability and accuracy of the setting and application of the in - machine measuring device through the optimized design of the specific structures of the steady rest and the point - light - source module, ensuring that the in - machine measurement process of the in - machine measuring device can be carried out accurately and reliably.

[0026] (3) The in - machine measuring device applicable to the processing of large - depth blind holes of the present utility model has a simple structure and convenient operation. It can effectively utilize the existing machine - tool structure, and only needs to simply modify the existing machine - tool structure to realize the in - machine measurement of large - blind - hole workpieces, avoiding the secondary clamping and positioning of the workpieces caused by measurement, improving the accuracy and efficiency of the inner - diameter measurement during the processing of large - depth blind - hole workpieces, providing guarantee for the efficiency and accuracy of the final finish - machining of the workpieces, reducing the processing cost and application cost of large - depth blind - hole workpieces, and having good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 、 Figure 2 is a schematic structural diagram of a large - depth blind - hole processing device based on in - machine measurement in an embodiment of the present utility model;

[0029] Figure 3 is a schematic structural diagram of the steady rest of the large - depth blind - hole processing device in an embodiment of the present utility model;

[0030] Figure 4It is a schematic structural diagram of the measurement component of the large deep blind hole processing equipment in the embodiment of the present utility model;

[0031] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0032] 1. Chuck; 2. Displacement processing component; 3. Center rest; 4. Measurement component; 5. Workpiece;

[0033] 201. Tool rod seat; 202. Tool rod; 203. Cross slide; 204. Guide rail; 205. Tool holder;

[0034] 301. Ring-shaped bracket; 302. Pressing unit; 303. Supporting unit;

[0035] 401. Measuring ball module; 402. Point light source module; 4021. Point light source; 4022. Sealing cover plate; 4023. Sliding pin; 4024. Spiral groove disk; 4025. Control motor. Detailed implementation manners

[0036] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0037] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the present utility model, unless otherwise clearly specified or limited, the terms "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0041] Embodiment:

[0042] Refer to Figure 1 、 Figure 2 , in the present utility model, for the equipment and workpiece 5 involved, the following XYZ axis coordinates are constructed. Among them, the length direction of the machine tool (corresponding to the axial direction of the workpiece 5) is the Z axis, the horizontal direction perpendicular to the Z axis is the X axis, and the vertical direction perpendicular to the Z axis is the Y axis.

[0043] Specifically, the in-machine measuring equipment applicable to the machining of large deep blind holes in the preferred embodiment is as shown in Figure 1 . It is obtained by transforming the existing machine tool for machining large deep blind holes on long shaft workpieces. It includes a chassis located at one end of the machine tool. A chuck 1 is arranged on one side of the chassis along the Z-axis direction. The control mechanism of the chuck 1 is arranged inside the chassis, and the opening or locking of the chuck 1 can be realized by the control of the control mechanism.

[0044] By the arrangement of the chuck 1, reliable clamping of one end of the workpiece 5 to be machined can be realized.

[0045] Correspondingly, a steady rest 3 is provided for the fixation and clamping of the other end of the workpiece 5. For the steady rest in the preferred embodiment, it includes an annular bracket 301 with a through hole, and the bottom of the annular bracket 301 is fixedly arranged or displaceably arranged.

[0046] In a preferred embodiment, for the convenience of loading and unloading the workpiece 5 to be processed, the annular support 301 is arranged in a displaceable form, and its bottom is assembled and connected with a guide rail 204 extending along the Z-axis, and can reciprocate along the Z-axis under the guidance of the guide rail 204.

[0047] Meanwhile, in order to realize the support and fixation of the workpiece 5 by the annular support 301, at least three acting units capable of reciprocating radially along the annular support 301 are arranged at intervals in the circumferential direction of the annular support 301, and at least three points on the outer periphery of the workpiece 5 are abutted by them, so as to clamp and fix the workpiece 5.

[0048] In the preferred embodiment as Figure 3 shown, there are 3 acting units arranged at intervals on the annular support 301, namely, two support units 303 distributed on both sides of the annular support 301 and a pressing unit 302 located at the top of the annular support 301. The two support units 303 respectively support both sides of the workpiece 5, and then the pressing unit 302 presses the top of the workpiece 5, so that the pressing unit 302 reliably presses the workpiece 5 on the two support units 303.

[0049] In a preferred embodiment, the 3 acting units are arranged at equal intervals, and the interval angles between them are 120° respectively.

[0050] More specifically, for the acting units in the preferred embodiment, among them, the supporting part of the support unit 303 is preferably connected to a lead screw structure driven by a servo motor. By the forward and reverse driving of the servo motor, the reciprocating movement of the supporting part along the radial direction can be realized, so as to adjust the position of the supporting part and change the position state of the workpiece 5 after being clamped.

[0051] Meanwhile, the pressing part of the pressing unit 302 in the preferred embodiment is preferably connected to a telescopic mechanism driven by a cylinder or a hydraulic cylinder. For example, in the preferred embodiment as Figure 3 shown, the pressing unit 302 is a hydraulic mechanism including a hydraulic cylinder. By controlling the hydraulic cylinder, the lifting control of the pressing part can be realized, so as to press and fix one end of the workpiece 5 in place.

[0052] During actual use, one end of the workpiece 5 is clamped by the chuck 1, and the other end of the workpiece 5 is fixed by the steady rest 3. After the clamping of the chuck 1 is completed, by adjusting the two support units 303 on the steady rest 3, the clamping state of the workpiece 5 can be correspondingly changed, and the levelness (whether the Y-axis heights at both ends of the workpiece 5 are the same) and coaxiality (the parallel degree between the axial direction of the workpiece 5 and the Z-axis direction) of the workpiece 5 can be adjusted.

[0053] In the conventional machining process, the horizontality of the workpiece 5 is relatively easy to measure and maintain, and the Y-axis height of the clamped end of the center frame 3 can be relatively accurately adjusted to be the same as the Y-axis height of the clamped end of the chuck 1. However, the coaxiality of the workpiece 5 is difficult to accurately measure and maintain, resulting in a plane offset during the machining of the workpiece 5, which affects the machining quality of the workpiece 5.

[0054] For the on-machine measuring device in the preferred embodiment, its design purpose is to realize the offset during the rough machining of the workpiece 5 , to provide an accurate basis for adjusting the coaxiality of the workpiece 5 , and further to provide a guarantee for the subsequent fine machining of the workpiece 5 .

[0055] Furthermore, corresponding to the workpiece 5 clamped on the chuck 1 and the center frame 3, the machine tool also includes a displacement processing assembly 2 arranged on the side of the center frame 3 away from the chuck 1. In addition to the aforementioned guide rail 204 extending along the Z-axis, the displacement processing assembly 2 also includes a tool rod seat 201 corresponding to the guide rail 204. The bottom of the tool rod seat 201 is connected to the slide plate 203, and a through hole is opened in the middle for connecting the tool rod 202. The tool rod 202 is inserted into the tool rod seat 201.

[0056] At the same time, the carriage 203 in the preferred embodiment is assembled and connected to the guide rail 204 through the X-axis displacement mechanism, so that the carriage 203 can reciprocate along the X-axis driven by the X-axis displacement mechanism, and then adjust the X-axis position of the carriage 203 and the tool rod seat 201 on the carriage 203 to adapt to the different processing sizes of the processing tool on the tool rod 202.

[0057] Corresponding to the fixation of the machining tool, a tool handle 205 is provided at the end of the tool rod 202 , so as to be quickly assembled and connected with the machining tool to be used, thereby completing the deep blind hole machining of the workpiece 5 .

[0058] It can be understood that a Z-axis sliding mechanism is provided between the X-axis displacement mechanism and the guide rail 204 in the preferred embodiment, so as to drive the carriage 203 to slide back and forth in the Z-axis direction under the guidance of the guide rail 204 .

[0059] For the aforementioned machine tool, the processing requirements of the machine tool can be met by assembling and connecting the processing tool to the tool handle 205. On this basis, a measuring component 4 is further provided in the preferred embodiment to meet the on-machine measurement requirements of the machine tool.

[0060] The measuring component 4 in the preferred embodiment includes a measuring ball module 401 that can be assembled and connected to the tool handle 205, and a point light source module 402 arranged on the outer wall surface of the tool rod 202 on the side away from the tool handle 205. By separately setting the measuring ball module 401 and the point light source module 402, the diameter measurement of the corresponding measuring point inside the blind hole can be independently completed.

[0061] In the field of workpiece measurement, the aforementioned methods of contact measurement using a measuring ball and non-contact measurement using a point light source are relatively mature existing technologies. For example, the solutions for measurement using a measuring ball are described and applied in detail in the applicant's prior patents such as CN203579318U, CN203817886U, CN202180214U, etc., and will not be elaborated here; while for the method of measurement using a point light source, there are also relatively mature products in the existing technology, such as laser distance sensors, infrared distance sensors, etc., which will not be elaborated here either. Obviously, the two measurement technologies themselves are not the key points of concern in the present utility model, so they will not be elaborated here. The in-machine measurement device in the present utility model focuses on the combined design and use of the two technologies.

[0062] Further, to ensure the accuracy of the measurement results of the two modules, in the preferred embodiment, the measuring ball module 401 and the point light source module 402 assembled on the tool holder 205 are in the same XZ plane passing through the axis of the tool shank 202.

[0063] More specifically, for the integration of the point light source module 402 on the tool shank 202, a preferred design is carried out in the preferred embodiment, as shown in Figure 4 As shown. Among them, a receiving hole for receiving the point light source 4021 and an installation hole for installing supporting equipment are provided on one side surface of the tool shank 202. The point light source 4021 is embedded and installed in the receiving hole, and a control motor is provided in the installation hole, and a closable sealing cover plate 4022 is provided corresponding to the opening position of the receiving hole. One end of the sealing cover plate 4022 is provided with a sliding pin 4023, and a spiral groove disk 4024 is provided corresponding to the output end of the control motor 4025. The sliding pin 4023 and the spiral groove disk 4024 are assembled. Through the control of the control motor 4025, the sliding control of the sliding pin 4023 can be realized, and then the reciprocating translational movement of the sealing cover plate 4022 can be driven, so that it is switched from the state of shielding the point light source 4021 (initial state) to the state of being away from the point light source 4021 (working state).

[0064] Obviously, the main function of the relevant accessories provided corresponding to the point light source 4021 is the closed protection of the point light source 4021, especially the closed protection of the point light source 4021 when the tool shank 202 undertakes the processing operation requirements. According to the actual setting needs, the structure of the above-mentioned closed protection can be set in other forms, which can be an automatic opening and closing control method or a manual opening and closing control method, and will not be elaborated here.

[0065] Based on the above-mentioned settings and improvements of the machine tool structure, the machine tool structure in the preferred embodiment can complete the in-machine measurement after rough machining of a large deep blind hole while meeting the processing of a large deep blind hole of the workpiece 5.

[0066] In order to ensure the accuracy of the processing of the workpiece 5, when using the aforementioned machine tool to process large deep blind holes, it is preferred to perform rough processing first and then fine processing. The on-machine measurement process of the large deep blind holes is carried out after the rough processing is completed and before the fine processing begins, and the measurement results provide an accurate basis for adjusting the state position of the workpiece 5 before fine processing.

[0067] In actual use, for the on-machine measuring device for large deep blind holes in the preferred embodiment, the process during use is as follows:

[0068] After completing the rough machining of the workpiece 5, the tool rod 202 is withdrawn from the workpiece 5, the tool on the tool handle 205 is removed, the measuring ball module 401 is assembled and connected to the tool handle 205, and the position of the measuring ball in the measuring ball module 401 is adjusted to ensure that the measuring ball and the point light source 4021 are approximately in the same XZ plane, and the measuring ball is on the side of the tool rod 202 axis away from the point light source 4021; in this way, the measuring ball module 401 and the point light source module 402 can measure the inner diameter of the same point from completely opposite directions; thereafter, by adding the inner diameters measured by the two modules, half of the sum is the inner diameter measurement value of the measuring point, thereby completing the on-machine measurement of large deep blind holes.

[0069] It should be pointed out that in order to facilitate the measurement of the two modules, the two modules can be calibrated using the three-axis coordinate system of the machine tool, or the coordinate systems of the two module components can be measured and calibrated and measured separately, which will not be elaborated here.

[0070] The on-machine measuring device suitable for large deep blind hole processing in the utility model has a simple structure and is easy to operate. It can effectively utilize the existing machine tool structure and can realize the on-machine measurement of large blind hole workpieces only by simple modification of the existing machine tool structure, thereby avoiding secondary clamping and positioning of the workpiece due to measurement, improving the accuracy and efficiency of inner diameter measurement during the processing of large deep blind hole workpieces, providing guarantee for the efficiency and accuracy of the final finishing of the workpiece, reducing the processing cost and application cost of large deep blind hole workpieces, and having good economic value and practical value.

[0071] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An on-machine measuring device suitable for large deep blind hole processing, comprising a chuck for clamping one end of a workpiece and a center frame for clamping the other end of the workpiece, and a displacement processing assembly for driving a tool bar to reciprocate in an XZ plane is arranged at the end of the center frame away from the chuck; characterized in that: A measuring component is also provided corresponding to the tool rod; The measuring assembly includes a measuring ball module that can be assembled on a tool handle connected to the end of the tool rod and a point light source module arranged on the outer peripheral wall surface of the end of the tool rod; and the measuring ball module assembled on the tool handle is located on the side of the tool rod axis away from the point light source module.

2. The on-machine measuring device suitable for large deep blind hole processing according to claim 1 is characterized in that: The measuring ball module assembled on the tool handle and the point light source module are located in the same XZ plane passing through the tool rod axis.

3. The on-machine measuring device suitable for large deep blind hole processing according to claim 2 is characterized in that: The point light source module comprises a point light source, a sealing cover plate and a driving component; The point light source and the driving assembly are respectively embedded in the holes opened at the end of the knife rod; and the sealing cover plate is assembled with the driving assembly so that the position of the sealing cover plate can be changed by the driving assembly, so that the sealing cover plate can seal the point light source in the corresponding hole when the point light source is not working, and release the seal of the point light source when the point light source is working.

4. The on-machine measuring device suitable for large deep blind hole processing according to claim 3 is characterized in that: The driving assembly includes a sliding pin, a spiral groove disk and a control motor; The sliding pin is connected to one end of the sealing cover plate, which is assembled with the spiral groove disk, and the spiral groove disk is connected to the output end of the control motor, so that the control motor can drive the sealing cover plate to reciprocate and translate through the spiral groove disk.

5. The on-machine measuring device suitable for large deep blind hole processing according to claim 4 is characterized in that: The central frame comprises an annular frame and at least three action units arranged on the annular frame at intervals along the annular direction; The at least three action units can respectively move back and forth along the radial direction of the annular support to abut at least three points on the outer periphery of the workpiece.

6. The on-machine measuring device suitable for large deep blind hole processing according to claim 5, characterized in that: There are three action units, including a holding unit located at the top of the annular bracket and two supporting units located at both sides of the annular bracket; the two supporting units can respectively abut against the two side walls of the workpiece, and the holding unit can abut against the top of the workpiece and hold the workpiece on the two supporting units.

7. The on-machine measuring device suitable for large deep blind hole processing according to claim 6, characterized in that: The pressing part of the pressing unit is connected to a telescopic mechanism driven by a pneumatic cylinder or a hydraulic cylinder; and / or The supporting portion of the supporting unit is connected to a lead screw structure driven by a servo motor.

8. The on-machine measuring device suitable for large deep blind hole processing according to any one of claims 1 to 7, characterized in that: The bottom of the center frame is assembled on a guide rail extending along the Z axis in the displacement processing assembly, and can be reciprocated in the Z axis direction under the guidance of the guide rail.

9. The on-machine measuring device suitable for large deep blind hole processing according to claim 8, characterized in that: The displacement processing assembly includes a tool bar seat and a carriage arranged corresponding to the guide rail; The tool bar is inserted into the tool bar seat; the bottom of the tool bar seat is connected to the carriage, an X-axis displacement mechanism is arranged at the bottom of the carriage, and a Z-axis sliding mechanism is arranged between the X-axis displacement mechanism and the guide rail.

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