Precision positioning device and method for edgeless plate rectifying blade

Abstract

The invention discloses a precision positioning device for a non-edge plate straightening blade, which is used for clamping and positioning the blade. The blade is provided with a plurality of positioning points for positioning, including a base, a fixture body, a positioning mechanism and a measuring gauge, wherein the base is provided with a fixing mechanism for fixing the bottom of the blade; the fixture body is fixedly connected to the base, and the fixture body includes a support portion connected to the base and a first positioning plate and a second positioning plate respectively fixedly connected to both sides of the support portion; the positioning mechanism includes a positioning pin group fixedly connected to the first positioning plate for positioning the blade profile and a clamping bolt threadedly connected to the second positioning plate, the positioning pin shaft is used for abutting against the positioning points on the blade in a one-to-one correspondence, and the clamping bolt is used for clamping the blade so that the blade is fixed between the positioning pin group and the clamping bolt; the measuring gauge is fixedly connected to the first positioning plate, and the gauge head of the measuring gauge passes through the first positioning plate to contact the profile of the blade and measures the profile allowance of the blade.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning fixtures, and in particular, to a precision positioning device for edgeless straightening blades. In addition, the present invention also relates to a precision positioning method for edgeless straightening blades comprising the precision positioning device for edgeless straightening blades. Background Art

[0002] Blades are core components of aircraft engines and need to work in harsh environments such as high temperature, high pressure and high speed for a long time. The processing quality directly affects the performance and life of aircraft engines. Although blades are thin-walled parts, they have complex structures and poor rigidity, which makes it very easy for blades to deform during processing.

[0003] The structure of the edgeless plate straightening blade is special, and it does not have a tenon and an edge plate, which makes it inconvenient to directly clamp and position the blade. Therefore, the existing edgeless plate straightening blades are usually positioned by setting a process boss on the blade. However, since the process boss reference is small, when the length of the blade body is too long, there will be a certain positioning error during positioning. This makes it easy for the positioning accuracy to be insufficient during the subsequent processing of the blade, and it is difficult to group the blades according to the blade profile allowance size, thereby failing to meet the requirements of rapid clamping and processing of the positioned straightening blades on the array machine tool. Summary of the invention

[0004] The present invention provides a precision positioning device for edgeless straightening blades to solve the technical problem of how to achieve precise positioning of edgeless straightening blades and group them according to the surface margin size of the blades to complete the rapid clamping and processing of the straightening blades on an array machine tool.

[0005] According to one aspect of the present invention, there is provided a precision positioning device for a blade without an edge plate, which is used for clamping and positioning the blade, wherein the blade is provided with a plurality of positioning points for positioning, including a base, a fixture body, a positioning mechanism and a measuring gauge, wherein the base is provided with a fixing mechanism for fixing the bottom of the blade; the fixture body is fixedly connected to the base, the fixture body includes a support portion connected to the base and a first positioning plate and a second positioning plate respectively fixedly connected to both sides of the support portion; the positioning mechanism includes a positioning pin group fixedly connected to the first positioning plate for positioning the blade profile and a clamping bolt threadedly connected to the second positioning plate, the positioning pin shaft is used to abut against the positioning points on the blade in a one-to-one correspondence, and the clamping bolt is used to clamp the blade so that the blade is fixed between the positioning pin group and the clamping bolt; the measuring gauge is fixedly connected to the first positioning plate, and the gauge head of the measuring gauge passes through the first positioning plate and contacts with the profile of the blade to measure the profile allowance of the blade.

[0006] Furthermore, the fixing mechanism includes a 3R chuck fixed on the base and a 3R tray detachably connected to the 3R chuck, the 3R tray is provided with a fixing groove for fixing the bottom of the blade, and the blade is fixed to the 3R tray by pouring a low-melting-point alloy at the gap between the blade and the fixing groove.

[0007] Furthermore, the locating pin group includes a plurality of blade disk locating pins and a plurality of blade edge locating pins, the blade disk locating pins are used to abut against the profile of the blade, and the blade edge locating pins are used to abut against the edge of the blade.

[0008] Furthermore, the positioning mechanism also includes a first adjustment pad fixedly connected to the support portion for abutting against a first side edge of the blade and a clamping mechanism fixedly connected to the first positioning plate for abutting against a second side edge of the blade.

[0009] Furthermore, the clamping mechanism includes a connecting plate, a threaded rod and a buffer assembly, the connecting plate is fixedly connected to the first positioning plate and is located on the side of the first positioning plate away from the support portion, the connecting plate is provided with an installation cavity, the buffer assembly slides along the length direction of the installation cavity and one end of the buffer assembly extends from an end of the installation cavity close to the blade and is used to abut against the second side of the blade, the threaded rod is threadedly connected to the connecting plate and one end of the threaded rod extends from an end of the installation cavity away from the blade and abuts against the buffer assembly, and the threaded rod is used to push the buffer assembly to clamp the second side of the blade.

[0010] Further, the buffer assembly includes a sliding sleeve, an elastic member and a clamping pin coaxially arranged with the sliding sleeve, the sliding sleeve is slidably connected in the installation cavity, the first end of the sliding sleeve abuts against the threaded rod, the second end of the sliding sleeve is provided with a sliding groove, the clamping pin includes a pin rod and a limiting ring fixed to the pin rod, the outer ring wall of the limiting ring is slidably matched with the inner wall of the installation cavity, the first end of the pin rod is slidably matched with the sliding groove, the second end of the pin rod extends out of the installation cavity and is used to abut against the second side of the blade, and the elastic member is sleeved on the pin rod and is located between the second end of the sliding sleeve and the limiting ring.

[0011] Furthermore, the second end of the pin rod is sleeved with a second adjustment pad for protecting the second side edge of the blade.

[0012] Furthermore, one end of the clamping bolt that abuts against the blade is sleeved with a buffer sleeve for protecting the blade.

[0013] Furthermore, the buffer sleeve is a nylon sleeve or a rubber sleeve.

[0014] According to another aspect of the present invention, a method for precisely positioning a non-edge plate straightening blade is provided. The method is implemented based on the above-mentioned precise positioning device for non-edge plate straightening blades. The method comprises the following steps:

[0015] Step S100: fix the 3R chuck on the base, and connect the 3R tray to the 3R chuck;

[0016] Step S200: placing the bottom of the blade into the fixing groove;

[0017] Step S300: positioning the blade disk positioning pins corresponding to the positioning points of the blade profile, and positioning the blade edge positioning pins corresponding to the positioning points of the blade edge, and then tightening the clamping bolts to fix the blade between the positioning pin group and the clamping bolts;

[0018] Step S400: pouring a low melting point alloy into the gap between the blade and the fixing groove to fix the blade on the 3R tray, thereby completing the fixing of the blade;

[0019] Step S500: Measure the profile allowance of the blade through a measuring table and read the data, take the data of one blade as the reference data, and group the blades whose difference with the reference data is within 0.05mm into a group for subsequent processing of the blades.

[0020] The present invention has the following beneficial effects:

[0021] The precision positioning device of the edgeless plate straightening blade of the present invention is used for clamping and positioning the edgeless plate straightening blade. The device includes a base, a fixture body, a positioning mechanism and a measuring table. During specific operation, the positioning point on the blade for positioning is first determined. In order to facilitate subsequent positioning, the positioning point can be marked, and then the bottom of the blade is placed on the fixing mechanism, and then the positioning pins on the positioning pin group are used to correspond to the positioning points on the blade one by one for positioning, and then the clamping bolt is tightened so that the clamping bolt fixes the blade between the positioning pin group and the clamping bolt, and then the blade is fixed to the fixing mechanism, and then the measuring table is used to measure the profile allowance of the blade, and according to the measurement results, the blades within the tolerance range of the reference value are grouped in batches, and the fixing mechanism is removed from the base after grouping. At this time, the state of the blade fixed on the fixing mechanism is the state of the blade after being positioned by the positioning mechanism, and finally the blades divided into the same group are placed on the machine tool through the fixing mechanism for subsequent array processing. In the above device, multiple positioning points on the blade are matched and positioned by the positioning pin group, and the blade is fixed by the clamping screw, and then the bottom of the blade is fixed by the fixing mechanism. The state of the blade fixed on the fixing mechanism is the state of the blade after being positioned by the positioning mechanism. Since the positioning pin group performs multi-point positioning on the blade, the positioning accuracy of the blade is improved, thereby reducing the positioning error of the blade. At the same time, the profile allowance of the blade is measured by the measuring table, and the blades within the tolerance range of the reference value are grouped in batches according to the measurement results, so as to meet the requirements of the fast clamping and processing of the positioned rectifier blades on the array machine tool.

[0022] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a structural schematic diagram of a precision positioning device for edgeless plate straightening blades according to a preferred embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of blade positioning in a preferred embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a clamping mechanism according to a preferred embodiment of the present invention.

[0027] Legend:

[0028] 100, base; 101, 3R chuck; 102, 3R tray;

[0029] 200, support portion; 201, first positioning plate; 202, second positioning plate;

[0030] 300, positioning mechanism; 301, positioning pin group; 302, blade disk positioning pin; 303, blade edge positioning pin; 304, clamping bolt; 305, buffer sleeve; 306, first adjustment pad;

[0031] 400, measuring table;

[0032] 500, clamping mechanism; 501, connecting plate; 502, mounting cavity; 503, threaded rod; 504, sliding sleeve; 505, sliding groove; 506, clamping pin; 507, pin rod; 508, limiting ring; 509, second adjustment pad; 510, elastic member;

[0033] 600. Leaves. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0035] like Figure 1 As shown, a precision positioning device for a non-edge plate straightening blade 600 of this embodiment is used for clamping and positioning the blade 600. The blade 600 is provided with a plurality of positioning points for positioning, including a base 100, a fixture body, a positioning mechanism 300 and a measuring gauge 400. The base 100 is provided with a fixing mechanism for fixing the bottom of the blade 600; the fixture body is fixedly connected to the base 100, and the fixture body includes a support portion 200 connected to the base 100 and a first positioning plate 201 and a second positioning plate 202 respectively fixedly connected to both sides of the support portion 200; the positioning mechanism 300 includes a fixing A positioning pin group 301 connected to the first positioning plate 201 for positioning the profile of the blade 600 and a clamping bolt 304 threadedly connected to the second positioning plate 202, the positioning pin shaft is used to abut against the positioning points on the blade 600 one by one, and the clamping bolt 304 is used to clamp the blade 600 so that the blade 600 is fixed between the positioning pin group 301 and the clamping bolt 304; the measuring gauge 400 is fixedly connected to the first positioning plate 201, and the gauge head of the measuring gauge 400 passes through the first positioning plate 201 to contact the profile of the blade 600 and measure the profile allowance of the blade 600.

[0036] In this embodiment, the blade 600 has six positioning points for positioning, of which three positioning points are located on the profile of the blade 600 and are in a triangular shape on the profile of the blade 600, and the other three positioning points are distributed on the edge of the blade 600. Before positioning, you can use a marker to mark the corresponding positioning points to facilitate subsequent positioning. The number of positioning pins in the positioning pin group 301 is also six, and they are matched with the positioning points on the blade 600 to accurately position the blade 600.

[0037] In specific implementation, the precision positioning device of the edgeless plate straightening blade 600 is used to clamp and position the edgeless plate straightening blade 600. The device includes a base 100, a fixture body, a positioning mechanism 300 and a measuring gauge 400. In specific operation, the positioning point on the blade 600 for positioning is first determined. For the convenience of subsequent positioning, the positioning point can be marked, and then the bottom of the blade 600 is placed on the fixing mechanism, and then the positioning pins on the positioning pin group 301 are used to correspond to the positioning points on the blade 600 one by one for positioning, and then the clamping bolt 304 is tightened so that the clamping bolt 304 can clamp the blade 600 is fixed between the positioning pin group 301 and the clamping bolt 304, and then the blade 600 is fixed on the fixing mechanism, and then the surface allowance of the blade 600 is measured by the measuring table 400, and the blades 600 that are within the tolerance range of the reference value are grouped in batches according to the measurement results. After grouping, the fixing mechanism is removed from the base 100. At this time, the state of the blade 600 fixed on the fixing mechanism is the state of the blade 600 after being positioned by the positioning mechanism 300. Finally, the blades 600 divided into the same group are placed on the machine tool through the fixing mechanism for subsequent array processing. In the above device, the positioning pin group 301 is used to coordinate and position multiple positioning points on the blade 600, and then the blade 600 is fixed by the clamping screw, and then the bottom of the blade 600 is fixed by the fixing mechanism. The state of the blade 600 fixed on the fixing mechanism is the state of the blade 600 after being positioned by the positioning mechanism 300. Since the positioning pin group 301 performs multi-point positioning on the blade 600 to improve the positioning accuracy of the blade 600, thereby reducing the positioning error of the blade 600, the surface allowance of the blade 600 is measured by the measuring table 400, and the blades 600 within the tolerance range of the reference value are grouped in batches according to the measurement results to meet the requirements of rapid clamping and processing of the positioned rectifying blades 600 on the array machine tool.

[0038] Furthermore, the fixing mechanism includes a 3R chuck fixed on the base 100 and a 3R tray detachably connected to the 3R chuck, and the 3R tray is provided with a fixing groove for fixing the bottom of the blade 600, and the gap between the blade 600 and the fixing groove is fixed to the 3R tray by pouring a low-melting-point alloy.

[0039] In this embodiment, the 3R chuck can be detachably mounted on the base 100, and the 3R tray can be detachably clamped on the 3R tray. The fixed groove is only used to place the blade 600. After the bottom of the blade 600 extends into the fixed groove, the blade 600 can still be adjusted. After the positioning of the blade 600 is completed by the positioning mechanism 300, the gap between the blade 600 and the fixed groove is poured with a low melting point alloy to fix the blade 600 on the 3R tray. At this time, the 3R tray can be removed from the 3R chuck, and then the 3R tray is placed on the entire machine tool, so as to clamp and process the positioned blade 600. After the processing is completed, the 3R tray only needs to be placed in warm water at about 50°C to dissolve the low melting point alloy, so that the blade 600 falls off the 3R tray.

[0040] Furthermore, the positioning pin group 301 includes a plurality of blade disk positioning pins 302 and a plurality of blade edge positioning pins 303 . The blade disk positioning pins 302 are used to abut against the profile of the blade 600 , and the blade edge positioning pins 303 are used to abut against the edge of the blade 600 .

[0041] In this embodiment, the positioning pin group 301 includes three blade disk positioning pins 302 and three blade edge positioning pins 303. The blade disk positioning pins 302 are used to abut against the surface of the blade 600, and the blade edge positioning pins 303 are used to abut against the edge of the blade 600. The blade 600 is positioned by multiple positioning pins to ensure the accuracy of the positioning of the blade 600.

[0042] Reference Figure 2 and Figure 3 , the positioning mechanism 300 also includes a first adjustment pad 306 fixedly connected to the support portion 200 for abutting against the first side edge of the blade 600 and a clamping mechanism 500 fixedly connected to the first positioning plate 201 for abutting against the second side edge of the blade 600. In this embodiment, the first adjustment pad 306 and the clamping mechanism 500 abut against the first side edge and the second side edge of the blade 600 respectively, thereby clamping the blade 600. In order to protect the side edge of the blade 600 and prevent damage to the blade 600 during the clamping process, the first adjustment pad 306 can be set as a specific elastic rubber pad. The first adjustment pad 306 and the clamping mechanism 500 are set to prevent the blade 600 from moving to both sides, so as to improve the accuracy of positioning the blade 600.

[0043] Furthermore, the clamping mechanism 500 includes a connecting plate 501, a threaded rod 503 and a buffer assembly, the connecting plate 501 is fixedly connected to the first positioning plate 201 and is located on the side of the first positioning plate 201 away from the support portion 200, the connecting plate 501 is provided with an installation cavity 502, the buffer assembly slides along the length direction of the installation cavity 502 and one end of the buffer assembly extends out of the installation cavity 502 to abut against the second side of the blade 600, the threaded rod 503 is threadedly connected to the connecting plate 501 and one end of the threaded rod 503 extends into the installation cavity 502 to abut against the buffer assembly, and the threaded rod 503 is used to push the buffer assembly to clamp the second side of the blade 600.

[0044] In this embodiment, the connecting plate 501 is removably fixed to the first positioning plate 201 by screws, and the installation cavity 502 on the connecting plate 501 is set from the first side of the blade 600 to the second side. During implementation, the threaded rod 503 is screwed to make the threaded rod 503 push the buffer assembly to slide in the installation cavity 502, so that the buffer assembly contacts the blade 600 and presses the second side of the blade 600. With the cooperation of the first adjustment pad 306, the risk of the blade 600 moving to both sides is limited, thereby ensuring the secondary fixation of the blade 600. After convenient positioning, a low-melting-point alloy is poured on the bottom of the blade 600 to fix the blade 600 on the 3R tray.

[0045] Further, the buffer assembly includes a sliding sleeve 504, an elastic member 510 and a clamping pin 506 coaxially arranged with the sliding sleeve 504, the sliding sleeve 504 is slidably connected in the installation cavity 502, the first end of the sliding sleeve 504 abuts against the threaded rod 503, the second end of the sliding sleeve 504 is provided with a sliding groove 505, the clamping pin 506 includes a pin rod 507 and a limiting ring 508 fixed on the pin rod 507, the outer ring wall of the limiting ring 508 is slidably matched with the inner wall of the installation cavity 502, the first end of the pin rod 507 is slidably matched with the sliding groove 505, the second end of the pin rod 507 extends out of the installation cavity 502 and is used to abut against the second side of the blade 600, and the elastic member 510 is sleeved on the pin rod 507 and is located between the second end of the sliding sleeve 504 and the limiting ring 508.

[0046] In this embodiment, the elastic member 510 is a compression spring, and the buffer assembly is mainly provided to provide the pin 507 with a buffer stroke when the buffer member contacts the blade 600, so as to protect the side of the blade 600 from being damaged due to excessive clamping force during the clamping process. In specific implementation, the threaded rod 503 is twisted, the threaded rod 503 pushes the sliding sleeve 504 to move, and the sliding sleeve 504 pushes the pin 507 to move, so that the pin 507 abuts against the blade 600. After the pin 507 abuts against the blade 600, the threaded rod 503 is continued to be twisted, and the pin 507 pushes the elastic member 510 to compress under the abutment of the blade 600, so that the pin 507 slides in the sliding groove 505, forming a buffering effect during compression.

[0047] Furthermore, the second end of the pin 507 is sleeved with a second adjustment pad 509 for protecting the second side of the blade 600. In this embodiment, the second adjustment pad 509 is configured as a specific elastic rubber pad for protecting the second side of the blade 600 from being scratched during compression.

[0048] Furthermore, a buffer sleeve 305 for protecting the blade 600 is sleeved on one end of the clamping bolt 304 abutting against the blade 600. The buffer sleeve 305 is provided in this embodiment to protect the contact position between the clamping bolt 304 and the blade 600 from being scratched.

[0049] Further, the buffer sleeve 305 is a nylon sleeve or a rubber sleeve. When the buffer sleeve 305 abuts against the blade 600, the blade 600 is protected from being damaged in the abutment surface during compression. Further, the blisk locating pin 302 and the blade edge locating pin 303 on the locating pin group 301 also need to be provided with a buffer sleeve 305 for preventing the blade 600 from being scratched.

[0050] According to another aspect of the present invention, a method for precisely positioning a non-edge straightening blade 600 is provided. The method is implemented based on the above-mentioned precise positioning device for the non-edge straightening blade 600. The method comprises the following steps:

[0051] Step S100: fix the 3R chuck on the base 100, and connect the 3R tray to the 3R chuck;

[0052] In step S100, the 3R tray is fixed on the 3R chuck by clamping, and the 3R chuck has a fixing slot for placing the blade 600. The detachable setting of the 3R tray is to facilitate the removal of the 3R tray and then place it on the rectifying blade 600 for quick clamping on the array machine tool.

[0053] Step S200: placing the bottom of the blade 600 into the fixing groove;

[0054] For step S200, the fixing groove is used to initially position the blade 600. After the bottom of the blade 600 is placed in the positioning groove, the position of the blade 600 can be adjusted within a limited range to meet the positioning and fixing of the blade 600 by the positioning pin group 301.

[0055] Step S300: Position the blade disk positioning pin 302 corresponding to the positioning point of the profile of the blade 600, and position the blade edge positioning pin 303 corresponding to the positioning point of the edge of the blade 600, and then tighten the clamping bolt 304 to fix the blade 600 between the positioning pin group 301 and the clamping bolt 304;

[0056] For step S300, the blade 600 has six positioning points for positioning, of which three positioning points are located on the profile of the blade 600 and are in a triangular shape on the profile of the blade 600, and the other three positioning points are distributed on the edge of the blade 600. Before positioning, you can use a marker to mark the corresponding positioning points to facilitate subsequent positioning. The positioning pin group 301 includes three blade disk positioning pins 302 and three blade edge positioning pins 303. The blade disk positioning pins 302 are used to abut the profile of the blade 600, and the blade edge positioning pins 303 are used to abut the edge of the blade 600. The blade 600 is positioned by multiple positioning pins to ensure the accuracy of the positioning of the blade 600.

[0057] Step S400: pouring a low melting point alloy into the gap between the blade 600 and the fixing groove to fix the blade 600 on the 3R tray, thereby completing the fixing of the blade 600;

[0058] For step S400, the 3R chuck can be detachably mounted on the base 100, and the 3R tray can be detachably clamped on the 3R tray. The fixed groove is only used to place the blade 600. After the bottom of the blade 600 extends into the fixed groove, the blade 600 can still be adjusted. After the positioning of the blade 600 is completed by the positioning mechanism 300, the gap between the blade 600 and the fixed groove is poured with a low melting point alloy to fix the blade 600 on the 3R tray. At this time, the 3R tray can be removed from the 3R chuck, and then the 3R tray is placed on the entire machine tool, so as to clamp and process the positioned blade 600. After the processing is completed, the 3R tray only needs to be placed in warm water at about 50°C to dissolve the low melting point alloy, so that the blade 600 falls off the 3R tray.

[0059] Step S500: Measure the profile allowance of the blade 600 through the measuring table 400 and read the data, take the data of one blade 600 as the reference data, and group the blades 600 whose difference with the reference data is within 0.05 mm into a group for subsequent processing of the blade 600.

[0060] With respect to step S500, the above device uses the positioning pin group 301 to coordinate and position multiple positioning points on the blade 600, and then uses the clamping screw to fix the blade 600, and then uses the fixing mechanism to fix the bottom of the blade 600. The state of the blade 600 fixed on the fixing mechanism is the state of the blade 600 after being positioned by the positioning mechanism 300. Since the positioning pin group 301 performs multi-point positioning on the blade 600 to improve the positioning accuracy of the blade 600, thereby reducing the positioning error of the blade 600, the surface allowance of the blade 600 is measured by the measuring table 400, and the blades 600 within the tolerance range of the reference value are grouped in batches according to the measurement results, so as to meet the requirements of the fast clamping processing of the positioned rectifier blades 600 on the array machine tool. In this embodiment, the tolerance range is 0.05mm.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A precision positioning device for a non-edge plate straightening blade, used for clamping and positioning a blade (600), wherein the blade (600) is provided with a plurality of positioning points for positioning, characterized in that: include: a base (100), wherein a fixing mechanism for fixing the bottom of the blade (600) is detachably connected to the base (100); A clamp body, the clamp body being fixedly connected to the base (100), the clamp body comprising a support portion (200) connected to the base (100), and a first positioning plate (201) and a second positioning plate (202) respectively fixedly connected to two sides of the support portion (200); A positioning mechanism (300), the positioning mechanism (300) comprising a positioning pin group (301) fixedly connected to the first positioning plate (201) for positioning the profile of the blade (600) and a clamping bolt (304) threadedly connected to the second positioning plate (202), the positioning pin group (301) being used to abut against positioning points on the blade (600) in a one-to-one correspondence, and the clamping bolt (304) being used to abut against the blade (600) so that the blade (600) is fixed between the positioning pin group (301) and the clamping bolt (304); a measuring gauge (400), the measuring gauge (400) being fixedly connected to the first positioning plate (201), the gauge head of the measuring gauge (400) passing through the first positioning plate (201) and contacting the profile of the blade (600) to measure the profile margin of the blade (600); The positioning mechanism (300) further comprises a first adjustment pad (306) fixedly connected to the support portion (200) and used for abutting against a first side edge of the blade (600), and a pressing mechanism (500) fixedly connected to the first positioning plate (201) and used for abutting against a second side edge of the blade (600); The clamping mechanism (500) includes a connecting plate (501), a threaded rod (503) and a buffer assembly, wherein the connecting plate (501) is fixedly connected to the first positioning plate (201) and is located on the side of the first positioning plate (201) away from the supporting portion (200), and an installation cavity (502) is provided on the connecting plate (501), and the buffer assembly slides along the length direction of the installation cavity (502), and one end of the buffer assembly extends from one end of the installation cavity (502) close to the blade (600) and is used to abut against the second side of the blade (600), the threaded rod (503) is threadedly connected to the connecting plate (501), and one end of the threaded rod (503) extends from one end of the installation cavity (502) away from the blade (600) and abuts against the buffer assembly, and the threaded rod (503) is used to push the buffer assembly to clamp the second side of the blade (600).

2. The precise positioning device for edgeless plate straightening blades according to claim 1, characterized in that: The fixing mechanism comprises a 3R chuck arranged on the base (100) and a 3R tray detachably connected to the 3R chuck, the 3R tray is provided with a fixing groove for fixing the bottom of the blade (600), and a low melting point alloy is poured into the gap between the blade (600) and the fixing groove so that the blade (600) is fixed to the 3R tray.

3. The precise positioning device for edgeless plate straightening blades according to claim 2, characterized in that: The positioning pin group (301) comprises a plurality of blade disk positioning pins (302) and a plurality of blade edge positioning pins (303), wherein the blade disk positioning pins (302) are used to abut against the profile of the blade (600), and the blade edge positioning pins (303) are used to abut against the edge of the blade (600).

4. The precise positioning device for edgeless plate straightening blades according to claim 1, characterized in that: The buffer assembly comprises a sliding sleeve (504), an elastic member (510) and a clamping pin (506) coaxially arranged with the sliding sleeve (504); the sliding sleeve (504) is slidably connected in the mounting cavity (502); a first end of the sliding sleeve (504) abuts against the threaded rod (503); a sliding groove (505) is provided at the second end of the sliding sleeve (504); the clamping pin (506) comprises a pin rod (507) and a limit stopper fixed on the pin rod (507); Ring (508), the outer ring wall of the limiting ring (508) is slidably matched with the inner wall of the installation cavity (502), the first end of the pin rod (507) is slidably matched with the sliding groove (505), the second end of the pin rod (507) extends out of the installation cavity (502) and is used to abut the second side of the blade (600), and the elastic member (510) is sleeved on the pin rod (507) and is located between the second end of the sliding sleeve (504) and the limiting ring (508).

5. The precise positioning device for edgeless plate straightening blades according to claim 4, characterized in that: The second end of the pin rod (507) is sleeved with a second adjustment pad (509) for protecting the second side edge of the blade (600).

6. The precise positioning device for edgeless plate straightening blades according to claim 1, characterized in that: One end of the clamping bolt (304) that abuts against the blade (600) is sleeved with a buffer sleeve (305) for protecting the blade (600).

7. The precise positioning device for edgeless plate straightening blades according to claim 6, characterized in that: The buffer sleeve (305) is a nylon sleeve or a rubber sleeve.

8. A method for precisely positioning a non-edge straightening blade, wherein the blade is positioned by using the precise positioning device for non-edge straightening blades as described in claim 3, characterized in that: The following steps are involved: Step S100: fix the 3R chuck on the base (100), and connect the 3R tray to the 3R chuck; Step S200: placing the bottom of the blade (600) into the fixing groove; Step S300: positioning the blade disk positioning pin (302) corresponding to the positioning point of the profile of the blade (600), and positioning the blade edge positioning pin (303) corresponding to the positioning point of the edge of the blade (600), and then tightening the clamping bolt (304) to fix the blade (600) between the positioning pin group (301) and the clamping bolt (304); Step S400: pouring a low melting point alloy into the gap between the blade (600) and the fixing groove, so that the blade (600) is fixed on the 3R tray, thereby completing the fixing of the blade (600); Step S500: Measure the profile margin of the blade (600) using the measuring table (400) and read the data, take the data of one blade (600) as the reference data, and group the blades (600) whose difference with the reference data is within 0.05 mm into a group for subsequent processing of the blades (600).

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