CN117948858A - A high-precision machined parts accuracy detection device - Google Patents

Abstract

The invention discloses a precision detection device for a high-precision machined part, which relates to the technical field of workpiece precision detection and comprises a bottom plate, wherein the upper surface of the bottom plate is connected with an X-axis moving mechanism, a moving part of the X-axis moving mechanism is fixedly connected with a Y-axis adjusting mechanism, a screw thread of the Y-axis adjusting mechanism is connected with a Z-axis adjusting mechanism, and a moving part of the Z-axis adjusting mechanism is fixedly connected with a precision detection mechanism; the precision detection mechanism includes: and the mounting frame is fixedly connected with the moving part of the Z-axis adjusting mechanism, one side of the mounting frame, which is far away from the crankshaft to be measured, is spliced and provided with a guide plate, one side of the mounting frame, which is close to the crankshaft to be measured, is provided with a vertical limiting rod and a horizontal limiting rod in a sliding manner, the intersection point of the vertical limiting rod and the horizontal limiting rod is provided with a measuring rod in a sliding manner, one end of the measuring rod is fixedly connected with a guide seat, and the other end of the measuring rod is provided with a probe for measurement. The high-precision machining part precision detection device conveniently detects the machined irregular curved surface.

Description

A high-precision machined parts accuracy detection device

Technical Field

The present invention relates to the technical field of workpiece precision detection, and in particular to a high-precision machined workpiece precision detection device.

Background technique

Machining is a way of processing parts, which is to process raw materials to make them meet the final requirements and have relatively high precision and quality. When producing spare parts for industrial products such as automobiles, it is often necessary to machine different types of crankshafts or camshafts. The machined crankshaft or camshaft surface needs to pass the precision test before it can be used.

The crankshaft or camshaft contains irregular curved surfaces. Existing high-precision machined parts accuracy detection devices usually clamp the machined parts for manual measurement. Due to the irregularity of some curved surfaces, the measurement method is relatively complicated and it is impossible to conveniently detect whether the machined curved surfaces are qualified, resulting in low accuracy detection efficiency.

Therefore, a new type of high-precision machined parts accuracy detection device is needed.

Summary of the invention

1. Technical issues to be resolved

In view of the deficiencies in the prior art, the present invention provides a workpiece accuracy detection device for high-precision machined parts.

(II) Technical solution

To achieve the above-mentioned object, the present invention provides the following technical solution: a high-precision machined parts precision detection device, comprising a base plate, one end of which is equipped with a clamping mechanism, and the clamping mechanism is used to clamp the crankshaft to be tested, an upper surface of the base plate is connected to an X-axis moving mechanism, a moving part of the X-axis moving mechanism is fixedly connected to a Y-axis adjustment mechanism, a screw of the Y-axis adjustment mechanism is threadedly connected to a Z-axis adjustment mechanism, and a moving part of the Z-axis adjustment mechanism is fixedly connected to a precision detection mechanism;

The precision detection mechanism includes: an installation frame fixedly connected to the moving part of the Z-axis adjustment mechanism, a guide plate is plugged and installed on the side of the installation frame away from the crankshaft to be measured, a vertical limit rod and a horizontal limit rod are slidably provided on the side of the installation frame close to the crankshaft to be measured, and the vertical limit rod and the horizontal limit rod are perpendicular to each other, a measuring rod is slidably installed at the intersection of the vertical limit rod and the horizontal limit rod, one end of the measuring rod is fixedly connected to a guide seat, the guide plate is provided with two equidistant guide grooves, and two cylinders of the guide seat are respectively inserted into a guide groove, the shape of the guide groove of the guide plate is obtained by equidistantly enlarging the contour of the surface to be measured, a probe for measurement is provided at the other end of the measuring rod, and a marking pen parallel to the probe is provided on one side of the probe.

As a preferred embodiment of the present invention, a plurality of plug-in columns are fixedly mounted on a side of the mounting frame away from the crankshaft to be tested, and the guide plate is fixedly plugged with the plug-in columns.

As a preferred embodiment of the present invention, a set of locking components are fixedly installed at both ends of the installation frame;

Each set of locking components includes: a rotating seat fixedly connected to the outer wall of the installation frame, a baffle plate rotatably mounted on the rotating seat, and the baffle plate passes through the square hole of the installation frame and contacts the guide plate.

As a preferred embodiment of the present invention, the measuring rod passes through the through slots of the vertical limiting rod and the horizontal limiting rod at the same time.

As a preferred embodiment of the present invention, a sliding assembly is fixedly installed at the end of each of the vertical limit rod and the horizontal limit rod;

Each sliding assembly comprises a sliding seat fixedly connected to the end of the limiting rod, and a roller is rotatably mounted on the sliding seat.

As a preferred embodiment of the present invention, a mounting plate is fixedly installed on the other end of the measuring rod, and a mounting shell is installed on the mounting plate, a dial indicator is clamped between the mounting plate and the mounting shell, and the dial indicator is provided with a retractable probe, the marker pen is fixedly connected to a sliding seat, and the sliding rod of the sliding seat is slidably connected to the measuring rod, the sliding seat is rotatably connected to an adjusting screw, and the adjusting screw is threadedly connected to the measuring rod.

As a preferred embodiment of the present invention, the X-axis moving mechanism includes: two linear rails that are parallel and fixedly mounted on the base plate, a moving platform is fixedly mounted on the two linear rails, a mounting frame is fixedly mounted on the other end of the base plate, a driving motor is mounted on the mounting frame, an output end of the driving motor is coaxially fixedly connected to an X-axis screw, and the X-axis screw is threadedly connected to the moving platform.

As a preferred embodiment of the present invention, the Y-axis adjustment mechanism includes: a Y-axis seat fixedly connected to the moving platform, a Y-axis screw rotatably mounted on the Y-axis seat, and a first turntable coaxially fixedly connected to one end of the Y-axis screw.

As a preferred embodiment of the present invention, the Z-axis adjustment mechanism includes: a Z-axis seat threadedly connected to the Y-axis screw, a lifting block vertically slidably installed on the Z-axis seat, a worm rotatably installed in the middle of the Z-axis seat, a Z-axis screw rotatably installed in the inner cavity of the Z-axis seat, and the Z-axis screw is threadedly connected to the lifting block, a worm gear is coaxially fixed to the Z-axis screw sleeve, and the worm gear is meshed with the worm, and one end of the worm is coaxially fixedly connected to a second turntable.

As a preferred embodiment of the present invention, the clamping mechanism includes: a clamping seat fixedly mounted on one end of the base plate, the clamping seat is equipped with a chuck, and the chuck clamps the crankshaft to be tested.

Beneficial Effects

Compared with the prior art, the present invention provides a high-precision machined parts accuracy detection device, which has the following beneficial effects:

1. Through the adjustment of the Y-axis adjustment mechanism and the Z-axis adjustment mechanism and the cooperation with the X-axis moving mechanism, the dial indicator of the precision detection mechanism is made to fit the measured surface of the crankshaft to be measured. The measuring rod is pushed by hand to move, so that when the guide seat moves along the guide groove, the dial indicator is driven to rotate through the measuring rod, so that the probe of the dial indicator is always kept perpendicular to the section of the measured surface, which is convenient for the probe to detect the machining accuracy of the measured surface. When the convex surface exceeding the error lifts up the retractable probe, the marker pen contacts the convex surface exceeding the error and leaves a mark, and the unqualified processing is automatically marked directly on the surface, which is convenient for the later correction of the unqualified surface, and conveniently realizes the detection of irregular machined surfaces, and improves the efficiency of precision detection;

Second, when testing a new irregular curved surface, a new guide plate is installed on the mounting frame, wherein the through hole of the guide plate is first inserted into the plug-in column, and at the same time, the two cylinders of the guide seat are respectively inserted into the guide groove of a guide plate, and then the baffle is rotated to press against the guide plate so that the guide plate cannot move. Thanks to the replaceable design of the guide plate, the versatility of the high-precision machined parts precision detection device is improved;

3. Unscrew the bolts installed on the mounting shell to separate the mounting plate and the mounting shell, and then remove the dial indicator. Thanks to the replacement design of the dial indicator, the convenience of maintenance of the high-precision machined parts accuracy detection device is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG2 is an enlarged view of point A in FIG1 according to an embodiment of the present invention;

FIG3 is a schematic diagram of the overall structure of an embodiment of the present invention from another angle;

FIG4 is a schematic structural diagram of a Z-axis adjustment mechanism according to an embodiment of the present invention;

FIG5 is an exploded view of the Z-axis adjustment mechanism without the Z-axis seat according to an embodiment of the present invention;

FIG6 is a schematic diagram of the structure of an accuracy detection mechanism according to an embodiment of the present invention;

7 is a schematic diagram of the structure of the precision detection mechanism without the installation frame according to an embodiment of the present invention;

FIG8 is an enlarged view of point B in FIG7 according to an embodiment of the present invention;

FIG9 is an enlarged view of point C in FIG7 according to an embodiment of the present invention;

10 is a schematic diagram of the structure of a probe detecting a crankshaft to be tested according to an embodiment of the present invention;

FIG11 is an enlarged view of point D in FIG7 according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of the structure of a locking assembly according to an embodiment of the present invention.

In the figure:

1. Bottom plate;

2. X-axis moving mechanism; 21. Linear rail; 22. Moving table; 23. X-axis screw; 24. Mounting frame; 25. Driving motor; 26. Hexagon socket bolt;

3. Y-axis adjustment mechanism; 31. Y-axis seat; 32. Y-axis screw; 33. first turntable;

4. Z-axis adjustment mechanism; 41. Z-axis seat; 42. lifting block; 43. second turntable; 44. Z-axis screw; 45. worm wheel; 46. worm;

5. Precision detection mechanism; 51. Mounting frame; 52. Guide plate; 53. Vertical limit rod; 54. Horizontal limit rod; 55. Measuring rod; 56. Guide seat; 57. Sliding assembly; 571. Sliding seat; 572. Roller; 58. Lock assembly; 581. Rotating seat; 582. Baffle; 59. Mounting plate; 510. Mounting shell; 511. Dial indicator; 512. Plug-in column; 513. Probe; 514. Sliding seat; 515. Marker pen; 516. Adjusting screw;

6. Clamping mechanism; 61. Clamping seat; 62. Clamping plate;

7. Crankshaft to be tested.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Please refer to Figures 1-12, a high-precision machined parts precision detection device includes a base plate 1. The high-precision machined parts precision detection device can detect irregular curved surfaces of engine crankshafts or camshafts. A clamping mechanism 6 is installed at one end of the base plate 1, and the clamping mechanism 6 is used to clamp the crankshaft 7 to be tested. The high-precision machined parts precision detection device is used to detect irregular curved surfaces of the crankshaft 7 to be tested. An X-axis moving mechanism 2 is connected to the upper surface of the base plate 1, and the moving part of the X-axis moving mechanism 2 is fixedly connected to the Y-axis adjustment mechanism 3. The X-axis moving mechanism 2 and the Y-axis adjustment mechanism 3 are cross-arranged, and the X-axis moving mechanism 2 and the Y-axis adjustment mechanism 3 are perpendicular to each other. The X-axis moving mechanism 2 is used to drive the precision detection mechanism 5 to approach the crankshaft 7 to be tested. The Y-axis adjustment mechanism 3 is used to adjust the position of the precision detection mechanism 5 in the Y-axis direction. The screw of the Y-axis adjustment mechanism 3 is threadedly connected to the Z-axis adjustment mechanism 4. The Z-axis adjustment mechanism 4 is used to adjust the position of the precision detection mechanism 5 in the Z-axis direction. The moving part of the Z-axis adjustment mechanism 4 is fixedly connected to the precision detection mechanism 5. The precision detection mechanism 5 is used to detect the irregular curved surface of the crankshaft 7 to be tested. The linear moving direction of the moving part of the X-axis moving mechanism 2 is the X-axis direction, the linear moving direction of the Z-axis seat 41 is the Y-axis direction, and the linear moving direction of the moving part of the Z-axis adjustment mechanism 4 is the Z-axis direction. The moving part of the X-axis moving mechanism 2 is the moving table 22, and the moving part of the Z-axis adjustment mechanism 4 is the lifting block 42.

The clamping mechanism 6 includes: a clamping seat 61 fixedly mounted at one end of the base plate 1, a chuck 62 mounted on the clamping seat 61, and the chuck 62 clamps the crankshaft 7 to be tested. The driving and control functions of the chuck 62 are installed inside the clamping seat 61. The chuck 62 has a shaft locking function, so that the crankshaft 7 to be tested can be temporarily fixed in position for curved surface detection.

The X-axis moving mechanism 2 includes: two linear rails 21 that are parallel and fixedly mounted on the base plate 1. Each linear rail 21 is installed with a number of linearly evenly distributed hexagon socket bolts 26, and each hexagon socket bolt 26 is threaded on the base plate 1. The two linear rails 21 are jointly fixedly mounted with a moving platform 22, and a mounting frame 24 is fixedly mounted on the other end of the base plate 1, and a driving motor 25 is installed on the mounting frame 24. A bolt is respectively installed at the four corners of the driving motor 25, and each bolt is threadedly connected to the mounting frame 24. The output end of the driving motor 25 is coaxially fixedly connected with the X-axis screw 23, and the X-axis screw 23 is threadedly connected to the moving platform 22. A shaft coupling is installed at the output end of the driving motor 25, and it is coaxially fixedly connected with the X-axis screw 23 through the shaft coupling.

The Y-axis adjustment mechanism 3 includes: a Y-axis seat 31 fixedly connected to the moving table 22, a Y-axis screw 32 rotatably mounted on the Y-axis seat 31, and a first turntable 33 coaxially fixedly connected to one end of the Y-axis screw 32. A circular stop block is provided at both ends of the Y-axis screw 32, so that the Y-axis screw 32 can only rotate around its own axis and cannot move along the axis. The Y-axis screw 32 is coaxially fixedly connected to the first turntable 33 by welding. The Y-axis screw 32 can be driven to rotate by turning the first turntable 33 by hand, and the rotating Y-axis screw 32 drives the Z-axis seat 41 to slide linearly along the Y-axis seat 31.

The Z-axis adjustment mechanism 4 includes: a Z-axis seat 41 threadedly connected to the Y-axis screw 32, a lifting block 42 is vertically slidably installed on the Z-axis seat 41, and a worm 46 is rotatably installed in the middle of the Z-axis seat 41. A circular stopper is respectively provided at both ends of the worm 46, so that the worm 46 can only rotate around its own axis and cannot move along the axis. A Z-axis screw 44 is rotatably installed in the inner cavity of the Z-axis seat 41, and the Z-axis screw 44 is threadedly connected to the lifting block 42. A circular stopper is provided at the bottom of the Z-axis screw 44, so that the Z-axis screw 44 can only rotate around its own axis and cannot move along the axis. The Z-axis screw 44 is coaxially fixed with a worm wheel 45, and the worm wheel 45 is meshed with the worm 46. Rotating the worm 46 can drive the worm wheel 45 to rotate. One end of the worm 46 is coaxially fixedly connected to a second turntable 43, and the second turntable 43 is used to drive the worm 46 to rotate.

The precision detection mechanism 5 includes: a mounting frame 51 fixedly connected to the moving part of the Z-axis adjustment mechanism 4, and a guide plate 52 is inserted and installed on the side of the mounting frame 51 away from the crankshaft 7 to be tested. The mounting frame 51 is provided with an inlay groove for installing the guide plate 52. The guide plate 52 can be replaced according to the shape of the curved surface to be tested, so that the high-precision machined parts precision detection device can detect different curved surface processing accuracies. A vertical limit rod 53 and a horizontal limit rod 54 are slidably provided on the side of the mounting frame 51 close to the crankshaft 7 to be tested, and the vertical limit rod 53 and the horizontal limit rod 54 are perpendicular to each other, and a measuring rod 55 is slidably installed at the intersection of the vertical limit rod 53 and the horizontal limit rod 54. The vertical limit rod 53 and the horizontal limit rod 54 are both provided with a through groove, and the measuring rod 55 simultaneously penetrates the through grooves of the vertical limit rod 53 and the horizontal limit rod 54. One end of the measuring rod 55 is fixedly connected to a guide seat 56. The measuring rod 55 is fixedly connected to the middle of the guide seat 56. The guide plate 52 is provided with two equidistant guide grooves, and the two cylinders of the guide seat 56 are respectively inserted into one guide groove, and the shape of the guide groove of the guide plate 52 is obtained by equidistantly enlarging the contour of the surface to be measured. The spacing between the two cylindrical axes of the guide seat 56 is equal to the spacing between the center lines of the two guide grooves. A probe 513 for measurement is provided at the other end of the measuring rod 55, and a marking pen 515 parallel to the probe 513 is provided on one side of the probe 513. When the guide seat 56 moves along the guide groove, the measuring rod 55 drives the probe 513 to rotate, so that the probe 513 always remains perpendicular to the section of the surface to be measured, which is convenient for the probe 513 to detect the machining accuracy of the surface to be measured. The marking pen 515 is used to automatically mark on the raised surface for later correction.

A plurality of plug-in posts 512 are fixedly mounted on the side of the mounting frame 51 away from the crankshaft 7 to be tested, and the guide plate 52 is fixedly plugged with the plug-in posts 512. The plug-in posts 512 are used for mounting and positioning the guide plate 52. A set of locking components 58 are fixedly mounted on both ends of the mounting frame 51. The locking components 58 are used to fix the position of the guide plate 52 so that it cannot move.

Each set of locking components 58 includes: a rotating seat 581 fixedly connected to the outer wall of the installation frame 51, a baffle 582 is rotatably installed on the rotating seat 581, and the baffle 582 passes through the square hole of the installation frame 51 and contacts the guide plate 52. After the guide plate 52 is installed, the baffle 582 is rotated to make it close to the guide plate 52, so that the guide plate 52 cannot move.

The measuring rod 55 passes through the through slots of the vertical limiting rod 53 and the horizontal limiting rod 54. A sliding assembly 57 is fixedly installed at the ends of the vertical limiting rod 53 and the horizontal limiting rod 54. The mounting frame 51 is provided with a sliding groove adapted for linear sliding of the sliding assembly 57. The sliding assembly 57 can be configured as various assemblies that reduce the friction between the limiting rod and the mounting frame 51.

Each sliding assembly 57 includes a sliding seat 571 fixedly connected to the end of the limiting rod, and a roller 572 is rotatably mounted on the sliding seat 571. The roller 572 is used to reduce the friction between the limiting rod and the installation frame 51.

The other end of the measuring rod 55 is fixedly mounted with a mounting plate 59, and the mounting plate 59 is mounted with a mounting shell 510, a dial gauge 511 is sandwiched between the mounting plate 59 and the mounting shell 510, and the dial gauge 511 is provided with a retractable probe 513, a marker pen 515 is fixedly connected with a sliding seat 514, and the sliding rod of the sliding seat 514 is slidably connected with the measuring rod 55, the sliding seat 514 is rotatably connected with an adjusting screw 516, and the adjusting screw 516 is threadedly connected with the measuring rod 55. The retractable probe 513 of the dial gauge 511 is used to detect whether the machining accuracy of the surface to be measured is within the error range. When the curved surface protrusion exceeding the error lifts up the retractable probe 513, the marker pen 515 and the curved surface protrusion exceeding the error leave a mark. The end of the adjusting screw 516 away from the probe 513 is provided with a hexagonal nut. By using a wrench to turn the hexagonal nut, the sliding seat 514 can be driven to move linearly along its own sliding rod, thereby adjusting the installation position of the marker 515 to meet the different error marking needs of the curved surface. The adjusting marker 51 is as close to the probe 513 as possible, so that the automatic marking point of the adjusting marker 51 is as close as possible to the unqualified part of the curved surface mechanism. The mounting plate 59 and the mounting shell 510 are fixedly connected by bolts. The mounting shell 510 is provided with a through hole for the adapter bolt, and the mounting plate 59 is provided with a threaded hole for the adapter bolt. The dial indicator 511 can be removed for replacement by unscrewing the bolts.

working principle:

When the high-precision machined parts precision detection device is used, the clamping mechanism 6 is used to clamp the crankshaft 7 to be tested, and then the X-axis moving mechanism 2 is used to drive the precision detection mechanism 5 to approach the crankshaft 7 to be tested, wherein the driving motor 25 drives the X-axis screw 23 to rotate, so that the X-axis screw 23 drives the moving platform 22 to move along the linear rail 21, so that the precision detection mechanism 5 approaches the crankshaft 7 to be tested, and then the probe 513 of the dial indicator 511 is made to fit the measured curved surface of the crankshaft 7 to be tested by adjusting the Y-axis adjustment mechanism 3 and the Z-axis adjustment mechanism 4 and cooperating with the X-axis moving mechanism 2, wherein the first turntable 33 is rotated by hand to drive the Y-axis screw 32 to rotate, and the rotating Y-axis screw 32 drives the Z-axis seat 41 to slide linearly along the Y-axis seat 31 to adjust the position of the precision detection mechanism 5 on the Y-axis, and the second turntable 43 is rotated by hand to drive the worm 46 to rotate, and the rotating The worm 46 drives the Z-axis screw 44 to rotate through the worm gear 45, so that the lifting block 42 moves in the Z-axis direction, which is used to adjust the position of the precision detection mechanism 5 on the Z-axis. When the probe 513 of the dial indicator 511 fits the measured surface of the crankshaft 7 to be measured, the measuring rod 55 is pushed by hand to move, so that the probe 513 of the dial indicator 511 fits the measured surface of the crankshaft 7 to be measured and moves to measure the machining accuracy error of the surface. When the guide seat 56 moves along the guide groove, it drives the probe 513 to rotate through the measuring rod 55, so that the probe 513 always remains perpendicular to the section of the measured surface, which is convenient for the dial indicator 511 to detect the machining accuracy of the measured surface. When the surface protrusion that exceeds the error lifts up the retractable probe 513, the marker pen 515 contacts the surface protrusion that exceeds the error to leave a mark, which is convenient for correcting the unqualified surface later.

When measuring a new curved surface, the guide plate 52 installed on the installation frame 51 is taken out and a new guide plate 52 is installed. When installing the new guide plate 52, the through hole of the guide plate 52 is first inserted into the plug-in column 512, and at the same time, the two cylinders of the guide seat 56 are respectively inserted into a guide groove of the guide plate 52, and then the baffle 582 is rotated to make it close to the guide plate 52, so that the guide plate 52 cannot move;

When replacing the dial gauge 511, unscrew the bolts mounted on the mounting shell 510 to separate the mounting plate 59 from the mounting shell 510, and then remove the dial gauge 511;

When adjusting the installation position of the marking pen 515, use a wrench to tighten the hexagonal nut to drive the sliding seat 514 to move linearly along its own sliding rod, so as to adjust the installation position of the marking pen 515 to meet the different error marking needs of the curved surface.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims (10)

1. A high-precision machined parts precision detection device, comprising a base plate (1), characterized in that: a clamping mechanism (6) is installed at one end of the base plate (1), and the clamping mechanism (6) is used to clamp a crankshaft (7) to be tested, an X-axis moving mechanism (2) is connected to the upper surface of the base plate (1), a moving part of the X-axis moving mechanism (2) is fixedly connected to a Y-axis adjustment mechanism (3), a screw of the Y-axis adjustment mechanism (3) is threadedly connected to a Z-axis adjustment mechanism (4), and a moving part of the Z-axis adjustment mechanism (4) is fixedly connected to a precision detection mechanism (5); The precision detection mechanism (5) comprises: a mounting frame (51) fixedly connected to a moving part of a Z-axis adjustment mechanism (4); a guide plate (52) is plugged and installed on a side of the mounting frame (51) away from the crankshaft (7) to be tested; a vertical limit rod (53) and a horizontal limit rod (54) are slidably provided on a side of the mounting frame (51) close to the crankshaft (7) to be tested, and the vertical limit rod (53) and the horizontal limit rod (54) are perpendicular to each other; and a sliding connection is formed between the intersection of the vertical limit rod (53) and the horizontal limit rod (54). A measuring rod (55) is provided, one end of which is fixedly connected to a guide seat (56), the guide plate (52) is provided with two equidistant guide grooves, and two cylinders of the guide seat (56) are respectively inserted into one guide groove, the shape of the guide groove of the guide plate (52) is obtained by equidistantly enlarging the contour of the surface to be measured, the other end of the measuring rod (55) is provided with a probe (513) for measurement, and a marking pen (515) parallel to the probe (513) is provided on one side of the probe (513). 2. A high-precision machined parts accuracy detection device according to claim 1, characterized in that: a plurality of plug-in columns (512) are fixedly installed on the side of the mounting frame (51) away from the crankshaft (7) to be tested, and the guide plate (52) is fixedly plugged with the plug-in columns (512). 3. A high-precision machined parts accuracy detection device according to claim 2, characterized in that: a set of locking components (58) are fixedly mounted on both ends of the mounting frame (51); Each group of the locking components (58) comprises a rotating seat (581) fixedly connected to the outer wall of the installation frame (51), a baffle (582) being rotatably mounted on the rotating seat (581), and the baffle (582) passes through a square hole of the installation frame (51) and contacts the guide plate (52). 4. A high-precision machined parts accuracy detection device according to claim 1, characterized in that: the measuring rod (55) simultaneously passes through the through slots of the vertical limit rod (53) and the horizontal limit rod (54). 5. A high-precision machined parts accuracy detection device according to claim 1, characterized in that: a sliding assembly (57) is fixedly mounted on the ends of the vertical limit rod (53) and the horizontal limit rod (54); Each of the sliding assemblies (57) comprises a sliding seat (571) fixedly connected to the end of the limiting rod, and a roller (572) is rotatably mounted on the sliding seat (571). 6. A high-precision machined parts accuracy detection device according to claim 1, characterized in that: the other end of the measuring rod (55) is fixedly mounted with a mounting plate (59), and the mounting plate (59) is mounted with a mounting shell (510), a dial indicator (511) is clamped between the mounting plate (59) and the mounting shell (510), and the dial indicator (511) is provided with a retractable probe (513), the marking pen (515) is fixedly connected with a sliding seat (514), and the sliding rod of the sliding seat (514) is slidably connected to the measuring rod (55), the sliding seat (514) is rotatably connected with an adjusting screw (516), and the adjusting screw (516) is threadedly connected to the measuring rod (55). 7. A high-precision machined parts accuracy detection device according to claim 1, characterized in that: the X-axis moving mechanism (2) comprises: two linear rails (21) parallel and fixedly mounted on the base plate (1), the two linear rails (21) are commonly fixedly mounted with a moving table (22), the other end of the base plate (1) is fixedly mounted with a mounting frame (24), the mounting frame (24) is mounted with a driving motor (25), the output end of the driving motor (25) is coaxially fixedly connected with an X-axis screw (23), and the X-axis screw (23) is threadedly connected to the moving table (22). 8. A high-precision machined parts accuracy detection device according to claim 7, characterized in that: the Y-axis adjustment mechanism (3) comprises: a Y-axis seat (31) fixedly connected to the moving platform (22), a Y-axis screw (32) rotatably mounted on the Y-axis seat (31), and a first turntable (33) coaxially and fixedly connected to one end of the Y-axis screw (32). 9. A high-precision machined parts accuracy detection device according to claim 8, characterized in that: the Z-axis adjustment mechanism (4) comprises: a Z-axis seat (41) threadedly connected to the Y-axis screw (32), the Z-axis seat (41) is vertically slidably installed with a lifting block (42), the middle part of the Z-axis seat (41) is rotatably installed with a worm (46), the inner cavity of the Z-axis seat (41) is rotatably installed with a Z-axis screw (44), and the Z-axis screw (44) is threadedly connected to the lifting block (42), the Z-axis screw (44) is coaxially fixed with a worm gear (45), and the worm gear (45) is meshed with the worm (46), and one end of the worm (46) is coaxially fixedly connected with a second turntable (43). 10. A high-precision machined parts accuracy detection device according to claim 1, characterized in that: the clamping mechanism (6) comprises: a clamping seat (61) fixedly mounted on one end of the base plate (1), the clamping seat (61) is equipped with a chuck (62), and the chuck (62) clamps the crankshaft (7) to be tested.