Workpiece detection tooling

Abstract

The utility model relates to detection equipment technical field, especially a work piece detection frock. Include: rack, the annular main body is provided with the feeding station, thickness detection station, hardness detection station, material collecting subassembly and feed module in proper order according to the feeding direction on the rack, the guide rod of feeding station is annular main body and can be moved axially, thickness detection station is pressed into a pair of spacing corresponding maximum allowable thickness's floating clamp plate through the down pressure subassembly, realizes thickness preliminary screening, the hardness detection station is used to eddy current detection subassembly and does nondestructive testing to thickness qualified piece, feed module is responsible for the transmission between each station, and material collecting subassembly collects qualified piece, and this frock passes through each part cooperation, realizes the automatic continuous detection, promotes the automation level and detection accuracy, guarantees detection consistency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a workpiece testing fixture. Background Technology

[0002] In precision machinery manufacturing, automotive parts, aerospace, and other fields, ring-shaped workpieces (such as bearing rings, sealing rings, flange bushings, etc.) are widely used. These workpieces typically have a ring-shaped main structure, which may have notches and internal holes (such as bearing holes, connecting holes). The thickness and hardness of the workpiece are key quality indicators that directly affect its performance, assembly accuracy, wear resistance, and lifespan, and must be rigorously tested. Traditional testing processes often involve multiple independent steps, which are inefficient and make it difficult to ensure the consistency and accuracy of the tests.

[0003] For batch inspection of ring-shaped workpieces with uniform external dimensions but high internal quality requirements, how to efficiently, automatically, and continuously complete the accurate detection of thickness and hardness and achieve automatic sorting of qualified products is a problem that urgently needs to be optimized and solved on the production line. Therefore, a workpiece inspection fixture is urgently needed to solve the above problems. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a workpiece inspection fixture, which solves the technical problems of low efficiency, excessive manual intervention, and difficulty in ensuring inspection consistency in traditional inspection methods.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A workpiece inspection fixture for inspecting the thickness and hardness of a workpiece, the workpiece comprising: an annular body having a notch and an inner hole, and a frame corresponding to the feeding direction of the annular body, the frame being provided with:

[0007] The loading station includes: a guide rod, a set of annular bodies sleeved on the guide rod, and the annular bodies being movable in the axial direction of the guide rod;

[0008] The thickness detection station includes a pressing component and a set of clamping plate components. The clamping plate components include a pair of floating and fitting clamping plates. The spacing between the pair of clamping plates corresponds to the maximum allowable thickness of the annular body. The pressing component is used to press the annular body on the guide rod into the space between the pair of clamping plates in sequence.

[0009] A hardness testing station, the hardness testing station including: an eddy current testing component, the eddy current testing component being used to test a ring-shaped body with qualified thickness;

[0010] The collecting assembly is used to collect ring-shaped bodies with qualified thickness and hardness.

[0011] The material conveying module is used to sequentially transfer the ring-shaped body between the thickness detection station, the hardness detection station, and the material collection assembly.

[0012] Based on the above structure, the principle of the workpiece inspection fixture is as follows: First, adjust the distance between a pair of clamping plates to correspond to the maximum allowable thickness of the annular body, calibrate the parameters of the eddy current detection component, and match the hardness standard value of the annular body; then, sequentially place the annular bodies to be inspected onto the guide rod, ensuring smooth fit between the inner hole and the guide rod, and arrange the annular bodies along the axial direction of the guide rod. Under the action of the pushing force, the annular bodies move along the axial direction of the guide rod to the entrance of the thickness detection station, waiting for inspection; activate the pressing component to press the first annular body on the guide rod between the pair of clamping plates. When the thickness of the annular body is less than or equal to the maximum allowable value, it smoothly passes through the gap between the clamping plates and enters the material conveying module between the thickness detection station and the hardness detection station; when the thickness of the annular body is greater than the maximum allowable value, the annular body is held in place by the pair of clamping plates; then, the material conveying module between the thickness detection station and the hardness detection station delivers the annular body with the acceptable thickness. The ring body is transferred to the hardness testing station, where the eddy current testing component begins operation. The eddy current probe (not shown) of the eddy current testing component excites an alternating magnetic field that acts on the ring body. The induction coil (not shown) of the eddy current testing component receives the change in induced current signal caused by the change in the electromagnetic characteristics of the ring body. Based on a preset threshold, it determines whether the hardness of the ring body is qualified. If the hardness meets the standard, it proceeds to the next transfer process; if the hardness does not meet the standard, it is diverted and rejected. Finally, the material conveying module between the hardness testing station and the collection component transfers the ring bodies with qualified thickness and hardness to the collection component, completing the collection. This application uses a pair of clamps to quickly perform a preliminary thickness screening of the ring body, then performs eddy current non-destructive hardness testing on the ring bodies that pass the preliminary screening, and finally collects the ring bodies with qualified thickness and hardness, completing the ring body testing. The ring bodies are automatically transferred between the stations by the material conveying module, improving testing efficiency and consistency.

[0013] Furthermore, in one workpiece inspection fixture of this application, the guide rod is provided with an extension portion, which extends axially along the loading station. When the annular body is sleeved on the guide rod, the extension portion is located within the notch. As a preferred embodiment of this application, the workpiece inspection fixture of this application uses the cooperation between the extension portion and the notch to achieve circumferential positioning of the annular body on the guide rod. On the one hand, this avoids jamming caused by circumferential offset when the annular body slides axially upward on the guide rod; on the other hand, the contact guidance between the notch and the extension portion ensures the stability of the relative position of the annular body when it enters the subsequent thickness inspection station.

[0014] Furthermore, in this application, a workpiece inspection fixture includes a material conveying module comprising: a first conveying mechanism disposed between a thickness inspection station and a hardness inspection station; the first conveying mechanism comprising: a turntable, a tray, and a rotation drive device; the tray being mounted on a frame; the turntable being rotatably mounted on the tray; the rotation drive device being used to drive the turntable to rotate; a set of clamping plate assemblies being spaced apart along the circumference of the tray; each clamping plate assembly being connected to the turntable and corresponding to the eddy current inspection assembly; and a material drop hole being provided on the tray. As a preferred embodiment of this application, a workpiece inspection fixture is provided. First, a pressing component presses the annular body into a clamping plate assembly located at the thickness detection station. If the thickness of the annular body is less than or equal to the maximum allowable value, the annular body moves between a pair of clamping plates. If the thickness of the annular body is greater than the maximum allowable value, the annular body is stuck between a pair of clamping plates. At this time, a rotating drive device drives a turntable to rotate, causing a set of clamping plate assemblies to move on a pallet. The annular body located between a pair of clamping plates rolls on the pallet. When an annular body with acceptable thickness is moved to the hardness detection station position along with its clamping plate assembly, this position is directly opposite the material drop hole on the pallet. At this time, the annular body with acceptable thickness falls from the material drop hole into the hardness detection station, while the annular body with unacceptable thickness, i.e., the annular body stuck between a pair of clamping plates, will rotate to the next position under the rotation of the turntable.

[0015] Furthermore, in a workpiece inspection fixture of this application, the pressing assembly includes: a pressing base, a pressing head, and a limiting head. The pressing base is located at the upper end of the thickness detection station. The pressing base has a receiving hole, which is directly opposite to a guide rod. The guide rod extends axially into the receiving hole. The pressing head passes through the pressing base and is vertically movable and adjustable. The limiting head is located inside the pressing base and floats opposite the end of the guide rod. The pressing head has a linkage rod, which passes through the limiting head. The linkage rod has an inclined surface. When the pressing head moves up and down, the limiting head slides on the inclined surface. As a preferred embodiment of this application, a workpiece inspection fixture, in its initial state, has an annular body fitted onto a guide rod, with the annular body located inside a lower pressure seat. The end of the guide rod near the lower pressure assembly is spaced apart from a spring-extended limiting head, the distance between the two being less than the thickness of the annular body. When the lower pressure seat presses down, the end of the pressure head abuts against the side edge of the annular body. The downward movement of the pressure head causes the inclined surface on the linkage rod to push the limiting head horizontally back. At this time, the gap between the end of the guide rod near the lower pressure assembly and the spring-extended limiting head increases. As the pressure head continues to press down, the pressure head will... The main body is pushed into a pair of clamping plates to detect thickness; during reset, the pressure head begins to move upward, driving the linkage rod upward, and the limit head elastically resets and extends, blocking the guide rod from moving the next ring body to be tested, preventing the next ring body to be tested from falling; the linkage design of the cavity and guide rod, and the pressure head and limit head, reduces the skewing or jamming when the pressure head presses down on the ring body, reducing the probability of tooling failure; the floating design of the limit head can accommodate the dimensional errors of the ring body, avoiding jamming of the entire pressing assembly due to out-of-tolerance ring bodies, and improving the adaptability of the tooling to batch ring bodies.

[0016] Furthermore, in a workpiece inspection fixture of this application, the clamping plate assembly further includes: a mounting part, which is mounted on a turntable; a pair of clamping plates including: a first clamping plate and a second clamping plate; the second clamping plate is mounted on the mounting part; the first clamping plate is mounted on the second clamping plate via a pair of rods; the pair of rods pass through the second clamping plate; each end of the pair of rods away from the first clamping plate is provided with a protrusion; the protrusion extends radially along the rod; an elastic element is sleeved on the rod; and both ends of the elastic element abut against the protrusion and the second clamping plate, respectively. As a preferred embodiment of this application, a workpiece inspection fixture is provided. The first clamping plate and the second clamping plate achieve axial floating through a rod and an elastic element. When the annular body is pressed in, the clamping force is automatically adjusted. When the annular body is pressed between the first clamping plate and the second clamping plate, if the thickness of the annular body is less than or equal to the preset distance between the first clamping plate and the second clamping plate, the annular body falls directly between the first clamping plate and the second clamping plate, and the tray supports the side of the annular body. If the thickness of the annular body is greater than the preset distance between the first clamping plate and the second clamping plate, during the pressing of the annular body, the first clamping plate moves axially along the rod, and the gap between the second clamping plate and the first clamping plate increases. Since the second clamping plate is provided with an elastic element on the side away from the first clamping plate, under the action of the elastic element, the first clamping plate and the second clamping plate will clamp the extra-thick annular body. Driven by the turntable, the extra-thick annular body is carried away from the hardness testing station.

[0017] Furthermore, in a workpiece inspection fixture of this application, a shim is provided between a pair of clamping plates. The shim is used to adjust the preset distance between the pair of clamping plates. A guide notch is provided on the pair of clamping plates, and the guide notch is positioned directly opposite the lower pressure seat. As a preferred embodiment of this application, in a workpiece inspection fixture, the shim is used to adjust the preset distance between the pair of clamping plates. By replacing shims of different thicknesses, the inspection gap can be controlled to adapt to annular bodies of different thicknesses, thereby improving the versatility of the inspection fixture. The guide notch is designed to guide the annular body when it is pressed into the pair of clamping plates, preventing jamming when pressing the annular body into the pair of clamping plates.

[0018] Furthermore, in a workpiece inspection fixture of this application, the material conveying module further includes: a second conveying mechanism, which is disposed between the hardness detection station and the material collection component. The second conveying mechanism is mounted on the frame and located below the material drop hole. The eddy current detection component is mounted between the tray and the second conveying mechanism. A waste pipe is provided on the second conveying mechanism, and the opening of the waste pipe is located on the side of the second conveying mechanism. As a preferred embodiment of this application, in a workpiece inspection fixture of this application, a ring-shaped body with acceptable thickness falls onto the second conveying mechanism through the material drop hole. During this process, the eddy current detection component uses the principle of electromagnetic induction to detect the ring-shaped body and determines whether the hardness of the ring-shaped body is acceptable based on a preset threshold. For ring-shaped bodies with unacceptable hardness, when conveyed on the second conveying mechanism past the opening of the waste pipe, an air-blowing rejection component (not shown) blows the unacceptable ring-shaped body into the waste pipe for collection. For ring-shaped bodies with acceptable hardness, the second conveying mechanism conveys them to the material collection component.

[0019] Furthermore, in this application, a workpiece inspection fixture includes a material collection assembly comprising: a guide rod disposed at the end of the second conveying mechanism away from the eddy current detection assembly; the guide rod being mounted on a frame; a tapered guide head at the end of the guide rod near the second conveying mechanism; when the annular body detaches from the second conveying mechanism, the annular body is fitted onto the guide rod by gravity; an adjustment part adapted to the missing part is provided on the guide rod; the tapered guide head is used to adjust the annular body to a preset position when it slides off the guide rod; a set of material collection discs is provided on the side of the guide rod away from the second conveying mechanism; the set of material collection discs is movable and adjustable in the conveying direction of the annular body; each material collection disc is rotatably mounted on the frame; a set of material collection columns is provided on the material collection disc; the set of material collection columns is evenly spaced along the circumference of the material collection disc; the end of the guide rod away from the second conveying mechanism is positioned directly opposite the material collection columns; a limiting part corresponding to the adjustment part is provided on the material collection column; the limiting part extends axially along the material collection column. As a preferred embodiment of this application, a workpiece inspection fixture is provided. After the annular body detaches from the second conveying mechanism, it falls under the influence of gravity. A conical guide head guides the inner hole of the annular body into the guide rod, preventing the annular body from jamming or falling due to deviation during the fall. The adjustment part adapts to the missing part. When the annular body slides down along the guide rod, the missing part cooperates with the adjustment part to adjust the annular body to a preset circumferential posture. When the annular body slides to the end of the guide rod, since the end of the guide rod away from the second conveying mechanism is directly opposite the collecting column, and the limiting part corresponds to the adjustment part, the annular body falls and is fitted onto the collecting column under the influence of gravity, ensuring that the posture of all annular bodies is uniform during collection, which is convenient for subsequent processes. When a collecting column is full of annular bodies, the corresponding collecting plate rotates, causing another collecting column to move to the end of the guide rod away from the second conveying mechanism. If the collecting plate is full, a set of movable and adjustable collecting plates can be switched to the next collecting plate to collect the annular bodies.

[0020] Furthermore, in one workpiece inspection fixture of this application, the frame is provided with a chuck, and the chuck has a limiting notch adapted to the guide rod. The limiting notch is used to accommodate the guide rod, and the chuck is movable and adjustable in the conveying direction of the annular body. As a preferred embodiment of this application, when the collecting tray rotates, the chuck moves towards the guide rod until the guide rod enters the limiting notch, so that the annular body sliding on the guide rod is limited at the upper end of the chuck, preventing the annular body from slipping off the guide rod and improving the overall automation efficiency.

[0021] Furthermore, in one workpiece inspection fixture of this application, a collection box is also provided on the frame. The collection box is located below the conical guide head and is used to collect accidentally dropped annular bodies. As a preferred embodiment of this application, the collection box of this workpiece inspection fixture can centrally collect dropped annular bodies and perform regular unified processing, reducing the frequency of manual intervention.

[0022] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0023] The purpose of this utility model is to provide a workpiece inspection fixture. By setting up a feeding station, a thickness detection station, a hardness detection station, a material collection component, and a material conveying module, it can realize automated and continuous detection of the thickness and hardness of a ring-shaped body. The thickness detection station uses a pair of adjustable-pitch clamps to achieve rapid initial thickness screening. The hardness detection station uses an eddy current detection component to perform non-destructive hardness testing. The material conveying module ensures stable transfer of the ring-shaped body between the stations. Finally, the material collection component realizes the orderly collection of qualified workpieces, improving the automation level and detection accuracy of the overall inspection process, so as to ensure the consistency and accuracy of the inspection. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a workpiece corresponding to a workpiece inspection fixture in an embodiment of this application;

[0025] Figure 2 This is a three-dimensional structural schematic diagram of a workpiece inspection fixture in an embodiment of this application;

[0026] Figure 3 for Figure 2 Enlarged view of a portion of center circle A;

[0027] Figure 4 This is a three-dimensional structural diagram of the clamping plate assembly and the first conveying mechanism in a workpiece inspection fixture according to an embodiment of this application;

[0028] Figure 5 This is an internal structural diagram of the clamping plate assembly in a workpiece inspection fixture according to an embodiment of this application.

[0029] In the diagram: 1-ring body; 10-notch; 100-inner hole; 2-frame; 3-loading station; 31-guide rod; 311-extension; 4-thickness detection station; 41-pressing assembly; 411-pressing seat; 4110-receiving hole; 412-pressing head; 413-limiting head; 414-linkage rod; 4141-sloping surface; 415-mounting bracket; 42-clamping plate assembly; 420-guide notch; 421-clamping plate; 4211-first clamping plate; 4212-second clamping plate; 422-mounting part; 423-rod part; 4231-protrusion; 424-elastic element; 4 25-Gasket; 5-Hardness testing station; 51-Eddy current testing component; 6-Collection component; 61-Guide rod; 611-Conical guide head; 612-Adjustment part; 62-Collection tray; 63-Collection column; 631-Limiting part; 64-Slide plate; 65-Slide rail; 7-Conveying module; 71-First conveying mechanism; 710-Discharge hole; 711-Turntable; 712-Pattern; 713-Rotation drive device; 714-Second discharge hole; 715-Linear drive device; 72-Second conveying mechanism; 721-Waste pipe; 8-Chuck; 80-Limiting notch; 9-Collection box. Detailed Implementation

[0030] like Figure 1 , 2 As shown, a workpiece inspection fixture is used to inspect the thickness and hardness of a workpiece. The workpiece includes: an annular body 1, which has a notch 10 and an inner hole 100. The fixture also includes: a frame 2, which, corresponding to the feeding direction of the annular body 1, has the following sequentially arranged components:

[0031] The loading station 3 includes: a guide rod 31, a set of annular bodies 1 sleeved on the guide rod 31, and the annular bodies 1 being movable in the axial direction of the guide rod 31;

[0032] Thickness detection station 4 includes: a pressing component 41 and a set of clamping plate components 42. The clamping plate components 42 include: a pair of floating and fitting clamping plates 421. The distance between the pair of clamping plates 421 corresponds to the maximum allowable thickness of the annular body 1. The pressing component 41 is used to press the annular body 1 on the guide rod 31 into the space between the pair of clamping plates 421 in sequence.

[0033] Hardness testing station 5, the hardness testing station 5 includes: eddy current testing component 51, the eddy current testing component 51 is used to test the thickness of the ring body 1 that is qualified;

[0034] The collecting component 6 is used to collect the annular body 1, which has qualified thickness and hardness.

[0035] Material conveying module 7 is used to sequentially transfer the annular body 1 between the thickness detection station 4, the hardness detection station 5, and the material collection assembly 6.

[0036] Based on the above structure, the principle of the workpiece inspection fixture is as follows: First, adjust the distance between a pair of clamping plates 421 to correspond to the maximum allowable thickness of the annular body 1, calibrate the parameters of the eddy current detection component 51, and match the hardness standard value of the annular body 1; then, place the annular body 1 to be inspected onto the guide rod 31 in sequence, with the inner hole 100 smoothly fitting with the guide rod 31, and arrange the annular body 1 along the axial direction of the guide rod 31. Under the action of the pushing force, the annular body 1 moves along the axial direction of the guide rod 31 to the entrance of the thickness detection station 4, waiting for inspection; start the pressing component 41 to press the first annular body 1 on the guide rod 31 between the pair of clamping plates 421. When the thickness of the annular body 1 is less than or equal to the maximum allowable value, it passes smoothly through the gap between the clamping plates 421 and enters the material conveying module 7 between the thickness detection station 4 and the hardness detection station 5; when the thickness of the annular body 1 is greater than the maximum allowable value, the annular body 1 is stuck by the pair of clamping plates 421; then, the material conveying module between the thickness detection station 4 and the hardness detection station 5... 7. The ring-shaped body 1 with qualified thickness is transferred to the hardness testing station 5. The eddy current testing component 51 starts working. The eddy current probe (not shown) of the eddy current testing component 51 excites an alternating magnetic field acting on the ring-shaped body 1. The induction coil (not shown) of the eddy current testing component 51 receives the change in induced current signal caused by the change in the electromagnetic characteristics of the ring-shaped body 1. It judges whether the hardness of the ring-shaped body 1 is qualified according to the preset threshold. If the hardness meets the standard, it enters the next transfer process. If the hardness does not meet the standard, it is diverted and rejected. Finally, the material conveying module 7 between the hardness testing station 5 and the material collection component 6 transfers the ring-shaped body 1 with qualified thickness and hardness to the material collection component 6 to complete the collection. This application uses a pair of clamping plates 421 to quickly screen the thickness of the ring-shaped body 1. Then, the ring-shaped body 1 that passes the initial screening is subjected to eddy current non-destructive hardness testing. Finally, the ring-shaped body 1 with qualified thickness and hardness is collected to complete the testing of the ring-shaped body 1. The ring-shaped body 1 is automatically transferred between the stations by the material conveying module 7, which improves the testing efficiency and consistency. The number of clamping plate components 42 is 4.

[0037] In this embodiment, as Figure 4As shown, the guide rod 31 is provided with an extension 311, which extends axially along the loading station 3. When the annular body 1 is fitted onto the guide rod 31, the extension 311 is located within the notch 10. The cooperation between the extension 311 and the notch 10 achieves circumferential positioning of the annular body 1 on the guide rod 31. On the one hand, it avoids jamming caused by circumferential offset when the annular body 1 slides axially along the guide rod 31; on the other hand, the contact guidance between the notch 10 and the extension 311 ensures the stability of the relative position of the annular body 1 when it enters the subsequent thickness detection station 4. A vibratory feeder is provided at the end of the guide rod 31 away from the thickness detection station 4. The vibratory feeder is used to fit the annular body 1 onto the guide rod 31 and move the annular body 1 axially along the guide rod 31.

[0038] In this embodiment, the material conveying module 7 includes: a first conveying mechanism 71, which is located between the thickness detection station 4 and the hardness detection station 5. The first conveying mechanism 71 includes: a turntable 711, a tray 712, and a rotation drive device 713. The tray 712 is mounted on the frame 2, and the turntable 711 is rotatably mounted on the tray 712. The rotation drive device 713 is used to drive the turntable 711 to rotate. A set of clamping plate assemblies 42 are spaced along the circumference of the tray 712 on the tray 712. Each clamping plate assembly 42 is connected to the turntable 711 and corresponds to the eddy current detection assembly 51. The tray 712 is provided with a material drop hole 710. First, the pressing component 41 presses the annular body 1 into a clamping plate component 42 located at the thickness detection station 4. If the thickness of the annular body 1 is less than or equal to the maximum allowable value, the annular body 1 moves between a pair of clamping plates 421. If the thickness of the annular body 1 is greater than the maximum allowable value, the annular body 1 is stuck by a pair of clamping plates 421. At this time, the rotation drive device 713 drives the turntable 711 to rotate, causing a set of clamping plate components 42 to move on the tray 712. The annular body 1 located between a pair of clamping plates 421 rolls on the tray 712. When the annular body 1 with qualified thickness is moved to the hardness detection station 5 along with its clamping plate component 42, this position is directly opposite the material drop hole 710 on the tray 712. At this time, the annular body 1 with qualified thickness falls from the material drop hole 710 into the hardness detection station 5, while the annular body 1 with unqualified thickness, that is, the annular body 1 stuck in a pair of clamping plates 421, will be rotated to the next position by the rotation of the turntable 711. The tray 712 is also provided with a second discharge hole 714, which is used to collect the annular body 1 with poor thickness; the rotation drive device 713 adopts a motor.

[0039] In this embodiment, the pressing assembly 41 includes: a pressing base 411, a pressing head 412, and a limiting head 413. The pressing base 411 is located at the upper end of the thickness detection station 4. The pressing base 411 has a receiving hole 4110, which is directly opposite to the guide rod 31. The guide rod 31 extends axially into the receiving hole 4110. The pressing head 412 passes through the pressing base 411 and is vertically movable and adjustable. The limiting head 413 is located inside the pressing base 411 and floats opposite the end of the guide rod 31. The pressing head 412 has a linkage rod 414, which passes through the limiting head 413. The linkage rod 414 has an inclined surface 4141. When the pressing head 412 moves up and down, the limiting head 413 slides on the inclined surface 4141. In the initial state, the annular body 1 is fitted onto the guide rod 31, and the annular body 1 is located inside the lower pressure seat 411. The end of the guide rod 31 near the lower pressure assembly 41 is spaced apart from the elastically extended limiting head 413, and the distance between the two is less than the thickness of the annular body 1. When the lower pressure seat 411 presses down, the end of the pressure head 412 abuts against the side edge of the annular body 1. The downward movement of the pressure head 412 causes the inclined surface 4141 on the linkage rod 414 to push the limiting head 413 to retract horizontally. At this time, the gap between the end of the guide rod 31 near the lower pressure assembly 41 and the elastically extended limiting head 413 increases. As the pressure head 412 continues to press down, the pressure head 412 pushes the annular body 1 into a pair of clamps. The thickness is detected in plate 421. During reset, the pressure head 412 moves upward, driving the linkage rod 414 upward. The limit head 413 elastically resets and extends, blocking the guide rod 31 from moving up and down the next ring body 1 to be tested, preventing the next ring body 1 to be tested from falling. The linkage design of the receiving hole 4110 and the guide rod 31, and the pressure head 412 and the limit head 413, reduces the skewing or jamming when the pressure head 412 presses down on the ring body 1, reducing the probability of tooling failure. The floating design of the limit head 413 can accommodate the dimensional errors of the ring body 1, avoiding jamming of the entire pressing assembly 41 due to out-of-tolerance ring body 1, and improving the adaptability of the tooling to batches of ring bodies 1. The pressing assembly 41 also includes a mounting bracket 415, and the limit head 413 is mounted on the mounting bracket 415 by a spring.

[0040] In this embodiment, as Figure 5As shown, the clamping plate assembly 42 further includes: a mounting part 422, which is mounted on the turntable 711; a pair of clamping plates 421 including: a first clamping plate 4211 and a second clamping plate 4212; the second clamping plate 4212 is mounted on the mounting part 422; the first clamping plate 4211 is mounted on the second clamping plate 4212 via a pair of rods 423; the pair of rods 423 pass through the second clamping plate 4212; each end of the pair of rods 423 away from the first clamping plate 4211 is provided with a protrusion 4231; the protrusion 4231 extends radially along the rod 423; an elastic element 424 is sleeved on the rod 423; the two ends of the elastic element 424 abut against the protrusion 4231 and the second clamping plate 4212, respectively. The first clamping plate 4211 and the second clamping plate 4212 achieve axial floating through the rod 423 and the elastic element 424. When the annular body 1 is pressed in, the clamping force is automatically adjusted. When the annular body 1 is pressed between the first clamping plate 4211 and the second clamping plate 4212, if the thickness of the annular body 1 is less than or equal to the preset distance between the first clamping plate 4211 and the second clamping plate 4212, the annular body 1 falls directly between the first clamping plate 4211 and the second clamping plate 4212, and the tray 712 supports the side of the annular body 1; if the thickness of the annular body 1 is greater than or equal to the preset distance between the first clamping plate 4211 and the second clamping plate 4212, the annular body 1 falls directly between the first clamping plate 4211 and the second clamping plate 4212. When the preset distance between the first clamping plate 4211 and the second clamping plate 4212 is reached, during the pressing of the annular body 1, the first clamping plate 4211 moves axially along the rod 423, and the gap between the second clamping plate 4212 and the first clamping plate 4211 increases. Since the second clamping plate 4212 is provided with an elastic element 424 on the side away from the first clamping plate 4211, under the action of the elastic element 424, the first clamping plate 4211 and the second clamping plate 4212 will hold the extra-thick annular body 1. Driven by the turntable 711, the extra-thick annular body 1 is carried away from the hardness testing station 5. The elastic element 424 is a spring; the first conveying mechanism 71 is provided with a linear drive device 715. When the extra-thick annular body 1 is brought to the top of the second drop hole 714 by the first clamping plate 4211 and the second clamping plate 4212, the linear drive device 715 is used to push a pair of protrusions 4231 to make the extra-thick annular body 1 fall from between the first clamping plate 4211 and the second clamping plate 4212 into the second drop hole 714.

[0041] In this embodiment, a shim 425 is provided between the pair of clamping plates 421. The shim 425 is used to adjust the preset distance between the pair of clamping plates 421. A guide notch 420 is provided on the pair of clamping plates 421, and the guide notch 420 is positioned directly opposite the lower pressure seat 411. The shim 425 is used to adjust the preset distance between the pair of clamping plates 421. By replacing the shims 425 with different thicknesses, the detection gap can be controlled to adapt to annular bodies 1 of different thicknesses, thereby improving the versatility of the detection fixture. The guide notch 420 is designed to guide the annular body 1 when it is pressed into the pair of clamping plates 421, preventing jamming when pressing the annular body 1 into the pair of clamping plates 421.

[0042] In this embodiment, the material conveying module 7 further includes: a second conveying mechanism 72, which is located between the hardness testing station 5 and the material collection assembly 6. The second conveying mechanism 72 is mounted on the frame 2 and is located below the material drop hole 710. The eddy current testing assembly 51 is mounted between the tray 712 and the second conveying mechanism 72. The second conveying mechanism 72 is provided with a waste pipe 721, and the opening of the waste pipe 721 is located on the side of the second conveying mechanism 72. The ring-shaped body 1 with acceptable thickness falls through the drop hole 710 onto the second conveying mechanism 72. During this process, the eddy current detection component 51 uses the principle of electromagnetic induction to detect the ring-shaped body 1 and determines whether the hardness of the ring-shaped body 1 is acceptable based on a preset threshold. For ring-shaped bodies 1 with unacceptable hardness, when they are conveyed through the waste pipe 721 on the second conveying mechanism 72, the air blowing rejection component (not shown) blows the unacceptable ring-shaped body 1 into the waste pipe 721 for collection. For ring-shaped bodies 1 with acceptable hardness, the second conveying mechanism 72 conveys them to the collection component 6. The second conveying mechanism 72 uses a conveyor belt, and a waste collection box is provided on the frame 2. The end of the waste pipe 721 away from the first conveying mechanism 71 is connected to the waste collection box.

[0043] In this embodiment, the material collection assembly 6 includes: a guide rod 61, which is located at the end of the second conveying mechanism 72 away from the eddy current detection assembly 51. The guide rod 61 is mounted on the frame 2. A tapered guide head 611 is provided at the end of the guide rod 61 near the second conveying mechanism 72. When the annular body 1 is disengaged from the second conveying mechanism 72, the annular body 1 is fitted onto the guide rod 61 under the action of gravity. The guide rod 61 is provided with an adjustment part 612 adapted to the missing part 10. The tapered guide head 611 is used to adjust the annular body 1 to a preset position when it slides off the guide rod 61. A set of material collection trays 62 is provided on the side of the guide rod 61 away from the second conveying mechanism 72. The set of material collection trays 62 is movable and adjustable in the conveying direction of the annular body 1. Each material collection tray 62 is rotatably mounted on the frame 2. A set of material collection columns 63 is provided on the material collection tray 62. The set of material collection columns 63 is evenly spaced along the circumference of the material collection tray 62. The end of the guide rod 61 away from the second conveying mechanism 72 is positioned directly opposite the material collection column 63. The material collection column 63 is provided with a limiting part 631 corresponding to the adjusting part 612. The limiting part 631 extends along the axial direction of the material collection column 63. After the annular body 1 detaches from the second conveying mechanism 72, it falls under the influence of gravity. The conical guide head 611 guides the inner hole 100 of the annular body 1 into the guide rod 61, preventing the annular body 1 from getting stuck or falling due to deviation during the fall. The adjusting part 612 adapts to the notch 10. When the annular body 1 slides down along the guide rod 61, the notch 10 and the adjusting part 612 cooperate to adjust the annular body 1 to a preset circumferential posture. When the annular body 1 slides to the end of the guide rod 61, since the end of the guide rod 61 away from the second conveying mechanism 72 is directly opposite the collection column 63, Furthermore, the limiting part 631 corresponds to the adjusting part 612. Under the action of gravity, the annular body 1 falls and is fitted onto the collecting column 63, ensuring that the posture of all annular bodies 1 is uniform during collection, which is convenient for subsequent processes. When one collecting column 63 is full of annular bodies 1, the corresponding collecting plate 62 rotates, causing another collecting column 63 to move to the end of the guide rod 61 away from the second conveying mechanism 72. If the collecting plate 62 is full, a set of movable and adjustable collecting plates 62 can be switched to the next collecting plate 62 to collect the annular bodies 1. There are two collecting plates 62 in a set, which are spaced apart in the conveying direction of the annular bodies 1; there are 12 collecting columns 63 in a set. The collecting plates 62 are driven to rotate by a motor (not shown). The frame 2 is provided with a sliding plate 64, which is mounted on the frame 2 by a pair of slide rails 65. A set of collecting plates 62 are spaced apart on the slide rails 65.

[0044] In this embodiment, as Figure 3As shown, the frame 2 is equipped with a chuck 8, which has a limiting notch 80 adapted to the guide rod 61. The limiting notch 80 is used to accommodate the guide rod 61. The chuck 8 is movable and adjustable in the conveying direction of the annular body 1. When the collecting tray 62 rotates, the chuck 8 moves towards the guide rod 61 until the guide rod 61 enters the limiting notch 80, so that the annular body 1 sliding on the guide rod 61 is limited at the upper end of the chuck 8, preventing the annular body 1 from slipping off the guide rod 61 and improving the overall automation efficiency. The chuck 8 is movable and adjustable via a cylinder.

[0045] In this embodiment, the frame 2 is also equipped with a collection box 9, which is located below the conical guide head 611. The collection box 9 is used to collect accidentally dropped annular bodies 1. The collection box 9 can collect dropped annular bodies 1 in a centralized manner and process them periodically, reducing the frequency of manual intervention.

[0046] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A workpiece inspection fixture for inspecting the thickness and hardness of a workpiece, the workpiece comprising: An annular body (1), wherein the annular body (1) is provided with a notch (10) and an inner hole (100), characterized in that: it includes: a frame (2), wherein, corresponding to the feeding direction of the annular body (1), the frame (2) is provided with: The loading station (3) includes: a guide rod (31), a set of annular bodies (1) sleeved on the guide rod (31), and the annular bodies (1) are movable in the axial direction of the guide rod (31); Thickness detection station (4), the thickness detection station (4) includes: a pressing component (41) and a set of clamping plate components (42), the clamping plate components (42) include: a pair of floating and fitting clamping plates (421), the distance between the pair of clamping plates (421) corresponds to the maximum allowable thickness of the annular body (1), the pressing component (41) is used to press the annular body (1) on the guide rod (31) into the pair of clamping plates (421) in sequence; Hardness testing station (5), the hardness testing station (5) includes: eddy current testing component (51), the eddy current testing component (51) is used to test the thickness of the ring body (1). The material collection component (6) is used to collect the annular body (1) with qualified thickness and hardness. Material conveying module (7) is used to sequentially transfer the annular body (1) between the thickness detection station (4), the hardness detection station (5), and the material collection assembly (6).

2. The workpiece inspection fixture according to claim 1, characterized in that: The guide rod (31) is provided with an extension (311), which extends axially along the loading station (3). When the annular body (1) is sleeved on the guide rod (31), the extension (311) is located inside the missing part (10).

3. The workpiece inspection fixture according to claim 1, characterized in that: The material conveying module (7) includes: a first conveying mechanism (71), which is located between the thickness detection station (4) and the hardness detection station (5). The first conveying mechanism (71) includes: a turntable (711), a tray (712), and a rotation drive device (713). The tray (712) is mounted on the frame (2). The turntable (711) is rotatably mounted on the tray (712). The rotation drive device (713) is used to drive the turntable (711) to rotate. A set of clamping plate assemblies (42) are spaced along the circumference of the tray (712) on the tray (712). Each clamping plate assembly (42) is connected to the turntable (711) and corresponds to the eddy current detection assembly (51). The tray (712) is provided with a material drop hole (710).

4. The workpiece inspection fixture according to claim 1, characterized in that: The pressing assembly (41) includes: a pressing base (411), a pressing head (412), and a limiting head (413). The pressing base (411) is located at the upper end of the thickness detection station (4). The pressing base (411) has a receiving hole (4110) which is directly opposite to the guide rod (31). The guide rod (31) extends axially into the receiving hole (4110). The pressing head (412) passes through the pressing base (411). The pressing head (412) is vertically positioned... The limit head (413) is located inside the lower pressure seat (411) and is floating opposite the end of the guide rod (31). The pressure head (412) is provided with a linkage rod (414), which passes through the limit head (413). The linkage rod (414) is provided with an inclined surface (4141). When the pressure head (412) moves up and down, the limit head (413) slides on the inclined surface (4141).

5. The workpiece inspection fixture according to claim 3, characterized in that: The clamp assembly (42) further includes: a mounting part (422) mounted on a turntable (711), and a pair of clamps (421) including: a first clamp (4211) and a second clamp (4212), the second clamp (4212) mounted on the mounting part (422), the first clamp (4211) mounted on the second clamp (4212) by a pair of rods (423), the pair of rods (423) passing through the second clamp (4212), and each end of the pair of rods (423) away from the first clamp (4211) having a protrusion (4231), the protrusion (4231) extending radially along the rod (423), and an elastic element (424) sleeved on the rod (423), the two ends of the elastic element (424) abutting against the protrusion (4231) and the second clamp (4212) respectively.

6. The workpiece inspection fixture according to claim 1, characterized in that: A gasket (425) is provided between a pair of clamping plates (421), the gasket (425) is used to adjust the preset distance between the pair of clamping plates (421), and a guide notch (420) is provided on the pair of clamping plates (421), the guide notch (420) is set directly opposite the lower pressure seat (411).

7. The workpiece inspection fixture according to claim 3, characterized in that: The material conveying module (7) further includes: a second conveying mechanism (72), which is located between the hardness testing station (5) and the material collection assembly (6). The second conveying mechanism (72) is mounted on the frame (2) and is located below the discharge hole (710). The eddy current testing assembly (51) is mounted between the tray (712) and the second conveying mechanism (72). The second conveying mechanism (72) is provided with a waste pipe (721), and the opening of the waste pipe (721) is located on the side of the second conveying mechanism (72).

8. A workpiece inspection fixture according to claim 7, characterized in that: The material collection assembly (6) includes: a guide rod (61), which is located at the end of the second conveying mechanism (72) away from the eddy current detection assembly (51). The guide rod (61) is mounted on the frame (2). A tapered guide head (611) is provided at the end of the guide rod (61) near the second conveying mechanism (72). When the annular body (1) is disengaged from the second conveying mechanism (72), the annular body (1) is fitted onto the guide rod (61) by gravity. An adjustment part (612) is provided on the guide rod (61) to adapt to the missing part (10). The tapered guide head (611) is used to adjust the annular body (1) to a preset position when the annular body (1) slides on the guide rod (61). A set of collecting discs (62) is provided on the side of the guide rod (61) away from the second conveying mechanism (72). The set of collecting discs (62) is movable and adjustable in the conveying direction of the annular body (1). Each collecting disc (62) is rotatably mounted on the frame (2). A set of collecting columns (63) is provided on the collecting disc (62). The set of collecting columns (63) is evenly spaced along the circumference of the collecting disc (62). The end of the guide rod (61) away from the second conveying mechanism (72) is set directly opposite the collecting column (63). The collecting column (63) is provided with a limiting part (631) corresponding to the adjusting part (612). The limiting part (631) extends along the axial direction of the collecting column (63).

9. A workpiece inspection fixture according to claim 8, characterized in that: The frame (2) is provided with a chuck (8), which has a limiting notch (80) adapted to the guide rod (61). The limiting notch (80) is used to accommodate the guide rod (61). The chuck (8) is movable and adjustable in the conveying direction of the annular body (1).

10. A workpiece inspection fixture according to claim 8, characterized in that: The frame (2) is also provided with a collection box (9), which is located below the conical guide head (611) and is used to collect the ring body (1) that has fallen accidentally.

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