Powder metallurgy parts defect detection device and method

Abstract

The present invention relates to the technical field of part defect detection, and specifically proposes a powder metallurgy part defect detection device and method, the device comprising: an operating table, an internal support fixing mechanism, an external clamping mechanism, a visual inspection group 1 and a visual inspection group 2. The present invention cooperates with the internal support fixing mechanism and the external clamping mechanism to alternately perform internal support fixing and external clamping fixing on the flange, and cooperates with the corresponding visual inspection group 2 and visual inspection group 1, so as to achieve circumferential comprehensive detection of the outer annular surface, upper surface, inner annular surface and lower surface of the flange, which not only improves the convenience of comprehensive circumferential detection of the flange, but also avoids the problem of increased cost caused by detection through two devices. At the same time, under the cooperation of the rotating guide group and the rotating support guide group, the stability of the flange rotation and the visual inspection group 1 and the visual inspection group 2 can also be improved, thereby improving the accuracy of flange detection.

Description

Technical Field

[0001] The invention relates to the technical field of parts defect detection, and specifically proposes a powder metallurgy parts defect detection device and method. Background Art

[0002] Flanges are the most common powder metallurgy parts, among which large flanges are more common. After casting, powder metallurgy flanges need to be inspected for quality on their inner and outer rings and upper and lower surfaces. Quality inspection is generally carried out through visual inspection, which can detect scratches, cracks, holes, burrs and other defects, thereby improving product reliability and extending service life.

[0003] At present, the following problems exist when defect detection is performed on flanges: 1. Since the upper and lower surfaces and the inner and outer rings of the flange need to be inspected, but only three parts of the flange can be inspected at a time, another part of the flange needs to be fixed, which results in the flange needing to be turned over during inspection, or another inspection equipment needs to be used to complete the comprehensive inspection of the inner and outer rings and the upper and lower surfaces of the flange, which not only reduces the convenience of inspection, but also increases the inspection cost; 2. During inspection, the unstable rotation of the flange or the jitter caused by the unstable rotation of the visual inspection group can easily cause the captured image to be blurred, thereby causing inaccurate defect detection of the flange. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a powder metallurgy parts defect detection device and method to solve the technical problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: a powder metallurgy parts defect detection device, comprising: an operating table, the operating table is composed of a hollow ring and a support table installed at the bottom of the ring and connected to the ring, the top of the support table is rotatably connected to a rotating cylinder concentric with the ring, an internal supporting fixing mechanism is installed on the rotating cylinder, and an external clamping mechanism is installed on the inner ring surface of the ring.

[0006] The outer wall of the rotating cylinder is installed with L-shaped seats evenly arranged along the circumference of the rotating cylinder through supporting columns, and the vertical section and horizontal section of one of the L-shaped seats are both installed with visual inspection group 1, and the top of the support platform is slidably connected with an inverted L-shaped frame, and the vertical section and horizontal section of the inverted L-shaped frame are both installed with visual inspection group 2.

[0007] The inner support fixing mechanism includes a plurality of support brackets which are connected to the outer wall of the rotating cylinder by guide rods and slide radially thereof and are evenly arranged along its circumference. The vertical cross-section of the support bracket is L-shaped. The support brackets and the L-shaped seats are arranged alternately. A uniformly arranged support friction reduction group is installed on the top of the horizontal section of the support bracket. An inner clamping drive group and a rotation drive group which drive the plurality of support brackets to clamp the flange internally are installed on the support platform. The inner clamping drive group also drives the horizontal section of the inverted L-shaped frame to move above the flange through the linkage group. A rotation guide group is installed between the support bracket and the inverted L-shaped frame.

[0008] In one possible implementation, the internal clamping drive group includes a mounting groove opened at the bottom of the support platform, a cylinder is installed in the mounting groove through a bracket, a push rod is fixedly installed at the telescopic end of the cylinder, the push rod is slid into the rotating cylinder and then rotatably installed with a conical column whose diameter gradually decreases upward, the conical column is connected to the bottom of the inner wall of the rotating cylinder by a telescopic rod, a wedge is installed after the guide rod penetrates into the rotating cylinder, the wedge is connected to the inner wall of the rotating cylinder by a reset spring, a ball is rollingly installed on the inclined surface of the wedge, the ball rolls against the inclined surface of the conical column, and a support plate that slides through the rotating cylinder is fixedly installed on the vertical section of the support bracket close to the side wall of the rotating cylinder.

[0009] In one possible implementation, the linkage group includes a guide groove provided at the top of the support platform and slidably connected to the bottom of the vertical section of the inverted L-shaped frame, a connected through groove is provided between the guide groove and the mounting groove, the vertical section of the inverted L-shaped frame is provided with a connecting plate that passes through the through groove and then enters the mounting groove and is provided with a push-pull block, a return spring three is provided between the inverted L-shaped frame and the through groove and is sleeved on the connecting plate, the side of the lower end of the push-pull block away from the top rod is an inclined surface, the side wall of the top rod is provided with an L support rod, the top of the vertical section of the L support rod is rollingly connected with a ball bearing that contacts the inclined surface of the push-pull block, the top of the inverted L-shaped frame is provided with a sliding groove, and the inner ring surface of the circular ring is provided with a sliding plug plate that is slidably connected to the sliding groove.

[0010] The external clamping mechanism includes a plurality of external clamping plates which are connected to the inner ring surface of the circular ring by plug rods and slide along its radial direction and are evenly arranged along its circumference; an external clamping driving group which drives the external clamping plates to clamp the outer ring surface of the flange is installed inside the circular ring; a rotating supporting guide group which rotationally guides the L-shaped seats is installed between the external clamping plates and the plurality of L-shaped seats.

[0011] In a possible implementation, the support and friction reduction group includes evenly arranged spring grooves opened at the top of the horizontal section of the support frame, a mounting seat is installed in the spring groove through a supporting spring, and a friction reduction member is rotatably connected to the top of the mounting seat.

[0012] In one possible implementation, the rotating guide group includes a plug-in support ring that is installed together at the ends of the horizontal sections of multiple L-shaped seats, an arc-shaped slot is opened on the end face of the outer clamp close to the plug-in support ring, and the lower end face of the plug-in support ring is rollingly connected with evenly arranged balls.

[0013] In one possible implementation, the external clamping drive group includes a rotating ring rotatably connected to the inner wall of a circular ring, the inner ring surface of the rotating ring is equipped with arc-shaped push blocks that are evenly arranged along its circumference and correspond one-to-one with the insertion rod, and a ball is installed after the insertion rod penetrates the inner cavity of the circular ring, and a reset spring is installed between the insertion rod and the inner wall of the circular ring. The inner wall of the circular ring is equipped with an external clamping drive component that drives the rotating ring to rotate to push the insertion rod to move.

[0014] In one possible implementation, the rotating support guide group includes guide grooves opened at the ends of the vertical and horizontal sections of the support frame, and the ends of the horizontal and vertical sections of the inverted L-shaped frame are both equipped with arc-shaped clamping plates that are in sliding contact with the corresponding guide grooves, and the inner arc surface of the arc-shaped clamping plate is rollingly connected with evenly arranged balls.

[0015] In one possible implementation, the inner ring surface of the circular ring is installed with supporting plates evenly arranged along its circumference, the supporting plates are aligned with the guide grooves at the ends of the horizontal sections of the supporting brackets, and the lower end surfaces of the supporting plates near the guide grooves are rollingly connected with evenly arranged balls.

[0016] In a possible implementation, ear support plates are installed on both sides of the vertical section of the L-shaped seat arranged along its width direction, and the vertical section of the support frame is provided with support slots corresponding to adjacent ear support plates.

[0017] The present invention also provides a powder metallurgy parts defect detection method, comprising the following steps:

[0018] S1. Clean and place: clean the impurities and dust adhering to the surface of the flange, and then place the flange on the top of the horizontal section of multiple circumferential support brackets.

[0019] S2. The inner support is fixed, and the support bracket is driven to move away from the rotating cylinder through the inner clamping drive group until the vertical sections of multiple support brackets are clamped against the inner annular surface of the flange and clamped by the inner support. At this time, the inner clamping drive group also drives the inverted L-shaped frame to move toward the flange through the linkage group, so that the visual inspection group 2 installed on the lower end surface of the horizontal section of the inverted L-shaped frame is located above the flange. At the same time, the rotating guide group between the inverted L-shaped frame and the support bracket cooperates to plug and support the horizontal section and the vertical section of the inverted L-shaped frame.

[0020] S3, outer ring and upper end inspection, the rotating drive group drives the rotating cylinder to drive the guide rod and the support bracket to rotate, and the support bracket drives the flange to rotate. At this time, the two visual inspection groups installed on the inverted L-shaped frame respectively perform defect inspection on the outer ring surface and the top circumference of the flange.

[0021] S4, external clamping, the internal clamping drive group drives the inverted L-shaped frame and the supporting frame to reset, the horizontal section of the supporting frame supports the flange, and then the external clamping drive group drives multiple plug rods to push the outer clamping plate to move toward the flange until multiple outer clamping plates are tightly clamped against the outer ring surface of the flange. At this time, the rotating supporting guide group is plugged into the outer clamping plate to provide support and guidance when the L-shaped seat rotates.

[0022] S5, inner ring and lower end detection, the rotary drive group drives the rotary cylinder to rotate, and the visual inspection group rotates along the circumference of the flange to inspect the inner ring surface and the lower end surface of the flange.

[0023] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

[0024] 1. A powder metallurgy parts defect detection device designed by the present invention, through the cooperation of the internal support fixing mechanism and the external clamping mechanism, alternately performs internal support fixing and external clamping fixing on the flange, and cooperates with the corresponding visual inspection group two and visual inspection group one, so as to realize the circumferential integrated comprehensive inspection of the outer ring surface, upper surface, inner ring surface and lower surface of the flange, which not only improves the convenience of comprehensive circumferential inspection of the flange, but also avoids the problem of increased inspection cost caused by inspection by two devices. At the same time, under the cooperation of the rotating guide group and the rotating support guide group, the stability of the flange rotation and the visual inspection group one and the visual inspection group two can also be improved, thereby improving the accuracy of inspection.

[0025] 2. The present invention realizes the integrated drive of the inner support clamping of the flange and the movement of the inverted L-shaped frame by cooperating with the linkage group and the inner clamping drive group. It is not only convenient for the placement of the flange, but also enables the inverted L-shaped frame to synchronously drive the visual inspection group to move the flange in two directions along with the inner clamping of the flange, thereby improving the convenience of flange inspection.

[0026] 3. The mounting seat in the supporting and anti-friction group of the present invention cooperates with the supporting spring, so that the supporting frame can support the bottom of the flange when the flange is clamped internally, and can also avoid the problem that after the outer clamping plate clamps the outer annular surface of the flange, the rotating cylinder drives the L-shaped seat to rotate, and the visual inspection group inspects the flange, a convex defect appears on the lower end surface of the flange, which hinders the rotation and movement of the supporting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the parts defect detection device of the present invention.

[0029] Figure 2 The present invention Figure 1 A first partial cross-sectional view of .

[0030] Figure 3 The present invention Figure 1 A second partial cross-sectional view of .

[0031] Figure 4 The present invention Figure 1 A third partial sectional view of .

[0032] Figure 5 The present invention Figure 1 A partial sectional top view of .

[0033] Figure 6 The present invention Figure 1 Main sectional view.

[0034] Figure 7 The present invention Figure 6 Enlarged view of point A in .

[0035] Reference numerals:

[0036] 1. Operating table; 10. Circular ring; 101. Supporting plate; 11. Support table; 2. Rotating cylinder; 3. Internal support fixing mechanism; 30. Guide rod; 31. Support bracket; 32. Support anti-friction group; 320. Mounting seat; 321. Top support spring; 322. Anti-friction member; 33. Internal clamping drive group; 330. Mounting groove; 331. Push rod; 332. Conical column; 333. Telescopic rod; 334. Wedge block; 335. Reset spring 1; 336. Support plate; 34. Linkage group; 340. Guide groove; 341. Connecting plate; 342. Push-pushing block; 343. L Support rod; 344, sliding groove; 345, sliding plate; 346, reset spring three; 35, rotating guide group; 350, plug-in support ring; 351, arc-shaped slot; 4, external clamping mechanism; 40, plug-in rod; 41, external clamping plate; 42, external clamping drive group; 420, rotating ring; 421, pushing arc-shaped block; 422, reset spring two; 43, rotating support guide group; 430, guide groove; 431, arc-shaped clamping plate; 5, L-shaped seat; 50, ear support plate; 51, support slot; 6, visual inspection group one; 7, inverted L-shaped frame; 8, visual inspection group two; 9, flange. DETAILED DESCRIPTION

[0037] 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.

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] See also Figure 1 A powder metallurgy parts defect detection device comprises: an operating table 1, the operating table 1 is composed of a hollow ring 10 and a support table 11 installed at the bottom of the ring 10 and connected to the ring 10, the top of the support table 11 is rotatably connected to a rotating cylinder 2 concentric with the ring, an internal supporting fixing mechanism 3 is installed on the rotating cylinder 2, and an external clamping mechanism 4 is installed on the inner ring surface of the ring 10.

[0040] See also Figure 2 , Figure 3 and Figure 6The outer wall of the rotating cylinder 2 is installed with L-shaped seats 5 evenly arranged along the circumference of the rotating cylinder 2 through supporting columns, and the vertical section and horizontal section of one of the L-shaped seats 5 are installed with a visual detection group 6 (such as a CCD visual camera and a lighting source used in conjunction with it), and the top of the support platform 11 is slidably connected with an inverted L-shaped frame 7, and the vertical section and horizontal section of the inverted L-shaped frame 7 are installed with a visual detection group 8 (such as a CCD visual camera and a lighting source used in conjunction with it).

[0041] The CCD vision camera is used to capture images, and the lighting source is used to provide uniform lighting, reduce shadows and reflections, and improve the image recognition accuracy of the CCD vision camera; the image recognized by the CCD vision camera is sent to the image processing software, and the image processing software is used to process and analyze the image data.

[0042] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 The inner support fixing mechanism 3 includes a plurality of support brackets 31 connected to the outer wall of the rotating cylinder 2 by a guide rod 30, which slide along its radial direction and are evenly arranged along its circumference. The vertical cross-section of the support bracket 31 is L-shaped. The support bracket 31 and the L-shaped seat 5 are arranged alternately. The top of the horizontal section of the support bracket 31 is equipped with an evenly arranged support anti-friction group 32; the support platform 11 is equipped with an inner clamping drive group 33 and a rotation drive group for driving the plurality of support brackets 31 to clamp the flange 9 internally. The inner clamping drive group 33 also drives the horizontal section of the inverted L-shaped frame 7 to move above the flange 9 through the linkage group 34. A rotation guide group 35 is installed between the support bracket 31 and the inverted L-shaped frame 7.

[0043] In the initial state, the inverted L-shaped frame 7 is located on a side close to the inner surface of the circular ring 10 to prevent the horizontal section of the inverted L-shaped frame 7 from obstructing the placement of the flange 9, thereby facilitating the placement of the flange 9 on the horizontal section of the support frame 31.

[0044] When inspecting the outer annular surface and the top of the flange 9, the visual inspection group 1 6 does not work, and the guide rod 30 is driven by the internal clamping drive group 33 to drive the support bracket 31 to move away from the rotating cylinder 2 until the vertical sections of multiple support brackets 31 are tightly against the inner annular surface of the flange 9. At this time, the internal clamping drive group 33 drives the inverted L-shaped frame 7 to move toward the flange 9 through the linkage group 34, so that the visual inspection group 2 8 installed on the lower end surface of the horizontal section of the inverted L-shaped frame 7 is located above the flange 9. At the same time, the rotating guide group 35 between the inverted L-shaped frame 7 and the support bracket 31 cooperates with the horizontal section and the vertical section of the inverted L-shaped frame 7 for plug-in support, thereby improving the stability of the inverted L-shaped frame 7, so that the visual inspection group 2 8 can stably inspect the flange 9.

[0045] Then, the rotating cylinder 2 is driven by the rotating drive group to drive the guide rod 30 and the supporting bracket 31 to rotate, and the supporting bracket 31 drives the flange 9 to rotate. At this time, the two visual inspection groups 2 8 installed on the inverted L-shaped frame 7 respectively perform circumferential defect inspection on the outer ring surface and the top of the flange 9. During the rotation process, the inverted L-shaped frame 7 cooperates with the supporting bracket 31 through the rotating guide group 35, which not only improves the stability of the inverted L-shaped frame 7 and avoids the shaking of the visual inspection group 2 8 to affect the inspection of the flange 9, but also enables the inverted L-shaped frame 7 and the supporting bracket 31 to support each other for rotational guidance, maintains the distance between the two visual inspection groups 2 8 and the corresponding outer ring surface or top of the flange 9, and improves the inspection accuracy.

[0046] See also Figure 6 The inner clamping drive group 33 includes a mounting groove 330 opened at the bottom of the support platform 11, and a cylinder is installed in the mounting groove 330 through a bracket. A push rod 331 is fixedly installed at the telescopic end of the cylinder. After the push rod 331 is slid into the rotating cylinder 2, a conical column 332 with a diameter gradually decreasing upward is rotated and installed. The conical column 332 is connected to the bottom of the inner wall of the rotating cylinder 2 through a telescopic rod 333. After the guide rod 30 penetrates into the rotating cylinder 2, a wedge block 334 is installed. The wedge block 334 is connected to the inner wall of the rotating cylinder 2 through a return spring 335. A ball is rollingly installed on the inclined surface of the wedge block 334, and the ball rolls against the inclined surface of the conical column 332. A support plate 336 that slides through the rotating cylinder 2 is fixedly installed on the vertical section of the support bracket 31 near the side wall of the rotating cylinder 2.

[0047] When the flange 9 is placed on the support bracket 31, the cylinder pushes the push rod 331 and the tapered column 332 to move upward. The tapered column 332 pushes the ball on the wedge block 334 through the inclined surface and squeezes the guide rod 30 to drive the support bracket 31 to move toward the inner ring surface of the ring 10. At this time, the return spring 335 contracts until the vertical section of the support bracket 31 is tightly pressed against the inner ring surface of the flange 9, thereby achieving internal support and fixation of the flange 9, so that the top and outer ring surface of the flange 9 can be detected when the rotating cylinder 2 drives the flange 9 to rotate.

[0048] The rotating drive group includes a connecting tube fixedly installed at the bottom of the rotating cylinder 2, sleeved on the top rod 331 and rotatably inserted into the installation groove 330, and a driving shaft is rotatably connected in the installation groove 330. Gears are fixedly sleeved on the driving shaft and the connecting tube, and the two gears are meshed for transmission. The driving shaft is connected to an external motor, and the driving shaft is driven to rotate by the external motor. The driving shaft drives the connecting tube and the rotating cylinder 2 to rotate through the meshing transmission between the two gears. The rotating cylinder 2 drives the support frame 31 and the flange 9 to rotate through the guide rod 30 and the support plate 336, so that the two visual inspection groups 8 installed on the inverted L-shaped frame 7 can perform circumferential inspection on the outer annular surface and the top of the flange 9 respectively.

[0049] See also Figure 2 and Figure 6 The linkage group 34 includes a guide groove 340 opened at the top of the support platform 11 and slidably connected to the bottom of the vertical section of the inverted L-shaped frame 7, a through groove connected to the guide groove 340 and the mounting groove 330, the vertical section of the inverted L-shaped frame 7 is installed with a connecting plate 341 that passes through the through groove and then enters the mounting groove 330 and is installed with a push-pushing driving block 342, a return spring 346 is installed between the inverted L-shaped frame 7 and the through groove, the lower end of the push-pushing driving block 342 is an inclined surface away from the top rod 331, and the side wall of the top rod 331 is installed with an L support rod 343, the top of the vertical section of the L support rod 343 is rollingly connected with a ball that contacts the inclined surface of the push-pushing driving block 342, a sliding groove 344 is opened at the top of the inverted L-shaped frame 7, and a sliding plug plate 345 slidably connected to the sliding groove 344 is installed on the inner ring surface of the ring 10.

[0050] When the push rod 331 moves upward, it drives the L-shaped rod 343 to move upward. When the ball on the L-shaped rod 343 contacts the inclined surface of the push-pushing block 342, the L-shaped rod 343 squeezes the push-pushing block 342 through the ball to make the connecting plate 341 move toward the push rod 331. The connecting plate 341 drives the inverted L-shaped frame 7 to move toward the flange 9. At the same time, the top of the inverted L-shaped frame 7 slides along the sliding plate 345, so that the inverted L-shaped frame 7 maintains the stability of horizontal movement.

[0051] By cooperating with the linkage group 34 and the internal clamping drive group 33, the integrated drive of the internal support clamping of the flange 9 and the movement of the inverted L-shaped frame 7 is realized, which not only facilitates the placement of the flange 9, but also enables the inverted L-shaped frame 7 to synchronously drive the visual inspection group 2 8 to move toward the flange 9 along with the internal clamping of the flange 9, thereby improving the convenience of flange 9 detection.

[0052] See also Figure 1 , Figure 3 , Figure 5 and Figure 6 The outer clamping mechanism 4 includes a plurality of outer clamping plates 41 connected to the inner ring surface of the circular ring 10 by an insert rod 40, which slide along its radial direction and are evenly arranged along its circumference. An outer clamping driving group 42 is installed in the circular ring 10 to drive the outer clamping plates 41 to clamp the outer ring surface of the flange 9. A rotating supporting guide group 43 is installed between the outer clamping plates 41 and the plurality of L-shaped seats 5 to rotationally guide the L-shaped seats 5.

[0053] Before inspecting the inner annular surface and the lower end surface of the flange 9, the inner clamping drive group 33 drives the inverted L-shaped frame 7 and the support frame 31 to reset. After resetting, the horizontal section of the support frame 31 still supports the flange 9. At this time, the end of the horizontal section of the support frame 31 is located directly below the flange 9, preventing the support frame 31 from affecting the clamping of the flange 9 by the outer clamping plate 41.

[0054] Then, the external clamping drive group 42 drives multiple insertion rods 40 to push the external clamping plate 41 to move toward the flange 9 until the multiple external clamping plates 41 are tightly clamped against the outer annular surface of the flange 9. At this time, the L-shaped seat 5 is plugged into and matched with the external clamping plate 41 through the rotating support guide group 43, so as to support and guide the L-shaped seat 5 when it rotates, so that the horizontal section end of the L-shaped seat 5 is supported, thereby improving the stability of the L-shaped seat 5 when it rotates, and further improving the stability and accuracy of the two visual inspection groups 1-6 when inspecting the inner annular surface and the lower end surface of the flange 9.

[0055] Then the rotary drive group drives the rotary drum 2 to rotate, and the visual inspection group 6 rotates along the circumference of the flange 9, so as to inspect the inner annular surface and the lower end surface of the flange 9.

[0056] See also Figure 2 and Figure 7 The support and friction reduction group 32 includes evenly arranged spring grooves opened at the top of the horizontal section of the support bracket 31, and a mounting seat 320 is installed in the spring groove through a supporting spring 321. The top of the mounting seat 320 is rotatably connected with a friction reduction member 322 (such as a roller or a ball). The mounting seat 320 cooperates with the supporting spring 321, so that the support bracket 31 can support the bottom of the flange 9 when the flange 9 is clamped internally, and can reduce the friction between the flange 9 and the support bracket 31 when the rotating cylinder 2 drives the L-shaped seat 5 to rotate the visual inspection group 6 to inspect the flange 9. At the same time, when a convex defect appears on the lower end surface of the flange 9, the friction reduction member 322 and the mounting seat 320 squeeze the supporting spring 321 and move downward under the extrusion action of the convex defect on the surface of the flange 9, thereby preventing the defect on the surface of the flange 9 from hindering the rotation and movement of the support bracket 31.

[0057] See also Figure 2 , Figure 4 , Figure 5 and Figure 6 The rotating guide group 35 includes a plug-in support ring 350 installed together at the ends of the horizontal sections of multiple L-shaped seats 5. An arc-shaped slot 351 is opened on the end face of the outer clamping plate 41 near the plug-in support ring 350, and the lower end face of the plug-in support ring 350 is rollingly connected with evenly arranged balls (not shown in the figure).

[0058] When the outer clamping plate 41 moves toward the flange 9 to clamp the flange 9 externally, the plug-in support ring 350 is inserted into the arc-shaped slot 351, thereby supporting the horizontal section end of the L-shaped seat 5, and then the rotating drive group drives the rotating cylinder 2, the L-shaped seat 5 and the plug-in support ring 350 to rotate, and the two visual inspection groups 6 respectively inspect the inner annular surface and the lower end surface of the flange 9, and the plug-in support ring 350 rotates along the arc-shaped slots 351 on the multiple outer clamping plates 41, thereby improving the rotation stability of the visual inspection group 6, and then improving the accuracy of the inspection.

[0059] See also Figure 5 and Figure 6 The outer clamping drive group 42 includes a rotating ring 420 rotatably connected to the inner wall of the ring 10, and the inner ring surface of the rotating ring 420 is equipped with arc-shaped push blocks 421 that are evenly arranged along its circumference and correspond one to one with the insertion rod 40. After the insertion rod 40 penetrates the inner cavity of the ring 10, a ball is installed, and a return spring 422 is installed between the insertion rod 40 and the inner wall of the ring 10. The inner wall of the ring 10 is equipped with an outer clamping drive component that drives the rotating ring 420 to rotate to push the insertion rod 40 to move.

[0060] The outer clamp driving component can be a rotating shaft rotatably connected to the inner wall of the circular ring 10, and an inner gear ring is installed near the lower end of the inner ring surface of the rotating ring 420, and a gear that meshes with the inner gear ring is fixed on the rotating shaft. When the external motor drives the rotating shaft to rotate, the rotating shaft drives the rotating ring 420 to rotate through the meshing of the gear connected thereto with the inner gear ring. When the rotating ring 420 drives the push arc block 421 to rotate, the inclined surface of the push arc block 421 squeezes the ball on the insertion rod 40, thereby causing the reset spring 422 to contract, and the insertion rod 40 drives the outer clamp plate 41 to move toward the outer ring surface of the flange 9 until the outer clamp plate 41 clamps the flange 9 and fixes it.

[0061] See also Figure 2 , Figure 4 and Figure 6 The rotating support guide group 43 includes guide grooves 430 opened at the ends of the vertical and horizontal sections of the support frame 31, and the ends of the horizontal and vertical sections of the inverted L-shaped frame 7 are both equipped with arc-shaped clamping plates 431 that are in sliding contact with the corresponding guide grooves 430, and the inner arc surface of the arc-shaped clamping plate 431 is rollingly connected with evenly arranged balls.

[0062] When the inverted L-shaped frame 7 moves toward the flange 9 driven by the linkage group 34, the support frame 31 moves away from the rotating cylinder 2. When the vertical section of the support frame 31 is pressed against the inner annular surface of the flange 9, the upper and lower arc-shaped clamping plates 431 connected to the inverted L-shaped frame 7 are respectively inserted into the corresponding guide grooves 430 opened at the ends of the vertical section and the horizontal section of the support frame 31. The guide grooves 430 cooperate with the arc-shaped clamping plates 431 so that when the two visual inspection groups 2 8 respectively inspect the top and the outer annular surface of the flange 9, the horizontal section and the vertical section of the inverted L-shaped frame 7 are always supported, thereby improving the stability of the visual inspection group 2 8.

[0063] See also Figure 1 , Figure 2 and Figure 3 The inner ring surface of the ring 10 is installed with supporting plates 101 evenly arranged along its circumference, the supporting plates 101 are aligned with the guide groove 430 at the end of the horizontal section of the supporting bracket 31, and the lower end surface of the supporting plates 101 close to the guide groove 430 is rollingly connected with evenly arranged balls (not shown in the figure).

[0064] When the support bracket 31 moves in the direction away from the rotating cylinder 2 to clamp the inner annular surface of the flange 9, the support insert plate 101 is inserted into the guide groove 430 opened at the end of the horizontal section of the corresponding support bracket 31, thereby supporting the end of the horizontal section of the support bracket 31 and limiting the support bracket 31 when the support bracket 31 rotates, thereby improving the stability of the rotation of the support bracket 31, thereby further improving the stability of the inverted L-shaped frame 7 and the accuracy of the detection of the visual detection group 2 8.

[0065] See also Figure 3 The vertical section of the L-shaped seat 5 is installed with ear support plates 50 on both sides arranged along its width direction, and the vertical section of the support frame 31 is provided with support slots 51 corresponding to adjacent ear support plates 50. When the support frame 31 moves toward the outer wall of the rotating cylinder 2 under the elastic force of the reset spring 335, the ear support plate 50 is inserted into the support slot 51, thereby supporting the vertical section of the L-shaped seat 5. Under the plug-in cooperation of the ear support plate 50 and the support slot 51, and the plug-in support ring 350 and the arc-shaped slot 351, the horizontal section end and the vertical section end of the L-shaped seat 5 are supported, thereby improving the stability of the L-shaped seat 5 during rotation, and further improving the accuracy of the inner ring surface and the lower end surface detection of the flange 9 by the two visual inspection groups 6.

[0066] See also Figure 1-Figure 7 The present invention also provides a powder metallurgy parts defect detection method, comprising the following steps:

[0067] S1. Cleaning and placing: cleaning impurities and dust adhering to the surface of the flange 9, and then placing the flange 9 on the top of the horizontal section of multiple circumferential support brackets 31.

[0068] S2. The inner support is fixed, and the support bracket 31 is driven to move away from the rotating cylinder 2 through the inner clamping drive group 33 until the vertical sections of multiple support brackets 31 are tightly against the inner annular surface of the flange 9. At this time, the inner clamping drive group 33 also drives the inverted L-shaped frame 7 to move toward the flange 9 through the linkage group 34, so that the visual inspection group 2 8 installed on the lower end surface of the horizontal section of the inverted L-shaped frame 7 is located above the flange 9. At the same time, the rotating guide group 35 between the inverted L-shaped frame 7 and the support bracket 31 cooperates to plug and support the horizontal section and the vertical section of the inverted L-shaped frame 7.

[0069] S3, outer ring and upper end inspection, the rotating drive group drives the rotating cylinder 2 to drive the guide rod 30 and the supporting bracket 31 to rotate, and the supporting bracket 31 drives the flange 9 to rotate. At this time, the two visual inspection groups 8 installed on the inverted L-shaped frame 7 respectively perform defect inspection on the outer ring surface and the top circumference of the flange 9.

[0070] S4, external clamping, the internal clamping drive group 33 drives the inverted L-shaped frame 7 and the supporting frame 31 to reset, the horizontal section of the supporting frame 31 supports the flange 9, and then the external clamping drive group 42 drives multiple insertion rods 40 to push the outer clamping plate 41 to move toward the flange 9 until the multiple outer clamping plates 41 are tightly clamped against the outer annular surface of the flange 9. At this time, the rotating supporting guide group 43 is plugged into the outer clamping plate 41 to provide support and guidance when the L-shaped seat 5 rotates.

[0071] S5, inner ring and lower end detection, the rotary drive group drives the rotating cylinder 2 to rotate, and the visual inspection group 6 rotates along the circumference of the flange 9 to inspect the inner ring surface and the lower end surface of the flange 9 in the circumferential direction.

[0072] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0073] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A powder metallurgy parts defect detection device, characterized in that: include: The operating table (1) is composed of a hollow circular ring (10) and a support table (11) installed at the bottom of the circular ring (10) and connected to the circular ring; the top of the support table (11) is rotatably connected to a rotating cylinder (2) concentric with the circular ring; an internal supporting and fixing mechanism (3) is installed on the rotating cylinder (2); and an external clamping mechanism (4) is installed on the inner ring surface of the circular ring (10); The outer wall of the rotating cylinder (2) is provided with L-shaped seats (5) evenly arranged along the circumference of the rotating cylinder (2) through support columns, wherein the vertical section and the horizontal section of one of the L-shaped seats (5) are both provided with a visual inspection group 1 (6), and the top of the support platform (11) is slidably connected with an inverted L-shaped frame (7), and the vertical section and the horizontal section of the inverted L-shaped frame (7) are both provided with a visual inspection group 2 (8); The inner support fixing mechanism (3) comprises a plurality of support brackets (31) connected to the outer wall of the rotating cylinder (2) through a guide rod (30), sliding along the radial direction thereof and evenly arranged along the circumference thereof, the vertical cross section of the support bracket (31) being L-shaped, the support bracket (31) and the L-shaped seat (5) being arranged in a staggered manner, and a uniformly arranged support friction reduction group (32) being installed on the top of the horizontal section of the support bracket (31); an inner clamping driving group (33) and a rotation driving group for driving the plurality of support brackets (31) to clamp the flange (9) internally are installed on the support platform (11), the inner clamping driving group (33) also drives the horizontal section of the inverted L-shaped frame (7) to move to above the flange (9) through a linkage group (34), and a rotation guide group (35) is installed between the support bracket (31) and the inverted L-shaped frame (7); The outer clamping mechanism (4) comprises a plurality of outer clamping plates (41) connected to the inner ring surface of the circular ring (10) by means of an insert rod (40) and arranged evenly along its circumference so as to slide radially thereof; an outer clamping driving group (42) is installed in the circular ring (10) for driving the outer clamping plates (41) to clamp the outer ring surface of the flange (9); and a rotating support guide group (43) is installed between the outer clamping plates (41) and the plurality of L-shaped seats (5) for rotatingly guiding the L-shaped seats (5).

2. A powder metallurgy parts defect detection device according to claim 1, characterized in that: The inner clamping drive group (33) comprises a mounting groove (330) provided at the bottom of the support platform (11), a cylinder being mounted in the mounting groove (330) via a bracket, a push rod (331) being fixedly mounted on the telescopic end of the cylinder, the push rod (331) being slidably inserted into the rotating cylinder (2) and then being rotatably mounted with a conical column (332) whose diameter gradually decreases upwards, the conical column (332) being connected to the bottom of the inner wall of the rotating cylinder (2) via a telescopic rod (333), a wedge block (334) being mounted after the guide rod (30) penetrates into the rotating cylinder (2), the wedge block (334) being connected to the inner wall of the rotating cylinder (2) via a return spring 1 (335), a ball bearing being rollingly mounted on the inclined surface of the wedge block (334), the ball bearing rollingly contacting with the inclined surface of the conical column (332), a support plate (336) slidingly penetrating the rotating cylinder (2) being fixedly mounted on the vertical section of the support bracket (31) close to the side wall of the rotating cylinder (2) 3. The powder metallurgy parts defect detection device according to claim 1, characterized in that: The external clamping drive group (42) includes a rotating ring (420) rotatably connected to the inner wall of the circular ring (10), the inner ring surface of the rotating ring (420) is equipped with arc-shaped push blocks (421) evenly arranged along its circumference and corresponding to the insertion rod (40) one by one, and a ball is installed after the insertion rod (40) penetrates the inner cavity of the circular ring (10), and a second return spring (422) is installed between the insertion rod (40) and the inner wall of the circular ring (10), and the inner wall of the circular ring (10) is equipped with an external clamping drive component that drives the rotating ring (420) to rotate so as to push the insertion rod (40) to move.

4. A powder metallurgy parts defect detection device according to claim 2, characterized in that: The linkage group (34) comprises a guide groove (340) provided at the top of the support platform (11) and slidably connected to the bottom of the vertical section of the inverted L-shaped frame (7); a through groove communicating with the guide groove (340) and the mounting groove (330); a connecting plate (341) passing through the through groove and then into the mounting groove (330) and provided with a push-pushing driving block (342) is provided on the vertical section of the inverted L-shaped frame (7); a connecting plate (341) sleeved on the connecting plate (341) is provided between the inverted L-shaped frame (7) and the through groove. ), a return spring three (346) on the push-pushing driving block (342) is provided, a side of the lower end away from the push rod (331) is an inclined surface, an L-shaped support rod (343) is installed on the side wall of the push rod (331), a ball bearing that contacts the inclined surface of the push-pushing driving block (342) is rollingly connected at the top of the vertical section of the L-shaped support rod (343), a sliding groove (344) is provided at the top of the inverted L-shaped frame (7), and a sliding plate (345) that is slidably connected to the sliding groove (344) is installed on the inner ring surface of the ring (10).

5. The powder metallurgy parts defect detection device according to claim 1, characterized in that: The rotating support guide group (43) comprises guide grooves (430) provided at the ends of the vertical section and the horizontal section of the support frame (31); the ends of the horizontal section and the vertical section of the inverted L-shaped frame (7) are both provided with arc-shaped clamping plates (431) in sliding contact with the corresponding guide grooves (430); the inner arc surface of the arc-shaped clamping plate (431) is rollingly connected with evenly arranged balls.

6. The powder metallurgy parts defect detection device according to claim 1, characterized in that: The rotating guide group (35) comprises a plug-in support ring (350) which is installed together at the ends of the horizontal sections of a plurality of L-shaped seats (5); an arc-shaped slot (351) is provided on the end surface of the outer clamping plate (41) close to the plug-in support ring (350); and the lower end surface of the plug-in support ring (350) is rollingly connected with evenly arranged balls.

7. The powder metallurgy parts defect detection device according to claim 5, characterized in that: The inner ring surface of the circular ring (10) is provided with support plates (101) evenly arranged along its circumference, the support plates (101) are aligned with the guide grooves (430) at the ends of the horizontal sections of the support bracket (31), and the lower end surface of the support plates (101) close to the guide grooves (430) is rollingly connected with evenly arranged balls.

8. The powder metallurgy parts defect detection device according to claim 1, characterized in that: The supporting friction reduction group (32) comprises evenly arranged spring grooves opened at the top of the horizontal section of the supporting frame (31), a mounting seat (320) is installed in the spring groove via a supporting spring (321), and a friction reduction member (322) is rotatably connected to the top of the mounting seat (320).

9. The powder metallurgy parts defect detection device according to claim 1, characterized in that: Ear support plates (50) are installed on both sides of the vertical section of the L-shaped seat (5) arranged along the width direction thereof, and the vertical section of the support frame (31) is provided with support slots (51) corresponding to adjacent ear support plates (50) one by one.

10. A powder metallurgy parts defect detection method, which is accomplished by using the powder metallurgy parts defect detection device according to claim 1, characterized in that: The following steps are involved: S1, cleaning and placing, cleaning impurities and dust adhering to the surface of the flange (9), and then placing the flange (9) on top of the horizontal section of multiple circumferential support brackets (31); S2, the inner support is fixed, and the inner clamping drive group (33) drives the support bracket (31) to clamp the inner ring surface of the flange (9) against the inner support. At this time, the inner clamping drive group (33) also drives the inverted L-shaped frame (7) to move toward the flange (9) through the linkage group (34), so that the visual inspection group 2 (8) installed on the lower end surface of the horizontal section of the inverted L-shaped frame (7) is located above the flange (9). At the same time, the rotating guide group (35) between the inverted L-shaped frame (7) and the support bracket (31) cooperates to plug and support the horizontal section and the vertical section of the inverted L-shaped frame (7); S3, outer ring and upper end inspection, the rotation drive group drives the rotating cylinder (2) to drive the support frame (31) and the flange (9) to rotate, and at this time, the two visual inspection groups (8) installed on the inverted L-shaped frame (7) respectively perform defect inspection on the outer ring surface and the top circumference of the flange (9); S4, external clamping, the internal clamping drive group (33) drives the inverted L-shaped frame (7) and the support frame (31) to reset, and then the external clamping drive group (42) drives the external clamping plate (41) to clamp the outer annular surface of the flange (9), and at this time, the rotating support guide group (43) is plugged into the external clamping plate (41) to support and guide when the L-shaped seat (5) rotates; S5, inner ring and lower end detection, the rotary drive group drives the rotary cylinder (2) to rotate, and the visual inspection group (6) rotates along the circumference of the flange (9) to inspect the inner ring surface and the lower end surface of the flange (9) in the circumferential direction.

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