Powder metallurgy automobile rotor oil hole detection device and detection method

Abstract

This invention relates to a powder metallurgy automotive rotor oil hole detection device and method. The detection device includes a worktable, a positioning seat mounted on the worktable for supporting and positioning the workpiece to be detected, a clamping mechanism disposed above the positioning seat for pressing and positioning the workpiece axially onto the positioning seat, and multiple detection mechanisms arranged in a circumferential array along the positioning seat, each detection mechanism corresponding to one oil hole. Each detection mechanism includes a main drive component, a push rod, and a detection rod. The main drive component is connected to the push rod via a detachable plug-in connector. The detection rod is connected to the front end of the push rod. The main drive component drives the push rod to move the detection rod towards the oil hole, thereby detecting the oil hole through the insertion state of the detection rod. This invention can simultaneously detect the diameter and position of multiple oil holes, resulting in high detection efficiency and small detection error.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy automotive rotor manufacturing technology, and in particular to a powder metallurgy automotive rotor oil hole detection device and detection method. Background Technology

[0002] Powder metallurgy automotive rotors are critical components in engines or transmissions, and their sides typically require multiple oil holes for lubrication. The machining accuracy of these oil holes (including their diameter and position) directly affects the rotor's assembly performance and service life. Therefore, the oil holes need to be inspected after machining. Currently, the industry commonly uses manual inspection, employing pin-type plug gauges (go / no-go gauges) to inspect each oil hole individually.

[0003] The above-mentioned inspection method has the following significant drawbacks: First, the go / no-go gauge can only determine whether the diameter of the oil hole is within the tolerance range (go gauge passes, no-go gauge does not pass), and cannot detect the position of the oil hole, which can easily lead to workpieces with positional deviations flowing downstream; Second, since the rotor usually has multiple oil holes, manual alignment, insertion, and removal are required one by one, which is labor-intensive and has low inspection efficiency; Third, it relies on the worker's feel and experience, lacks quantitative standards, and long-term operation can easily lead to visual fatigue and operational errors, resulting in missed inspections or misjudgments and large inspection errors.

[0004] Therefore, there is an urgent need for a detection device that can simultaneously detect the diameter and position of multiple oil holes and has a high degree of automation. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a powder metallurgy automotive rotor oil hole detection device and detection method.

[0006] In a first aspect, the present invention provides a powder metallurgy automobile rotor oil hole detection device, comprising a worktable, a positioning seat mounted on the worktable for supporting and positioning the workpiece to be detected, a pressing mechanism disposed above the positioning seat for pressing and positioning the workpiece on the positioning seat from the axial direction of the workpiece, and a plurality of detection mechanisms arranged in a circumferential array along the positioning seat, each of the detection mechanisms corresponding to an oil hole.

[0007] The detection mechanism includes a main drive unit, a push rod, and a detection rod. The output end of the main drive unit is connected to the push rod via a detachable plug-in connector. The detection rod is connected to the front end of the push rod. The main drive unit drives the push rod to feed the detection rod towards the oil hole, so as to detect the oil hole through the insertion state of the detection rod.

[0008] Preferably, the detection rod is a tapered columnar structure with a front end diameter smaller than the rear end diameter; a spring is sleeved on the push rod, which provides buffering during the detection process and reset power after the detection.

[0009] Preferably, the detachable plug-in connector includes a first plug and a second plug that are mutually plugged in. The first plug is connected to the output end of the main drive unit, and the second plug is connected to the push rod. The first plug and the second plug are fixed together by the engagement of a protrusion and a groove. When the detection rod gets stuck in the oil hole due to its small diameter, the pulling force generated by the retraction of the main drive unit causes the detachable plug-in connector to separate, thereby disconnecting the power transmission between the main drive unit and the push rod.

[0010] Preferably, the main drive component is a main cylinder, which is fixed to a mounting plate. A vertical plate is fixed on the mounting plate, and a through hole is provided on the vertical plate for the push rod to pass through. The front end of the push rod passes through the vertical plate and is connected to the detection rod.

[0011] Preferably, the spring is sleeved on the push rod between the separable plug-in connector and the upright plate, which provides buffering during the detection process and drives the push rod to reset after the detection is completed.

[0012] Preferably, the bottom of the mounting plate is connected to a support plate via a support column, and the support plate is mounted on a worktable. An arc-shaped through hole is made on the worktable, and the support plate is locked to the worktable by bolts passing through the arc-shaped through hole. Loosening the bolts allows for fine adjustment of the angle position of the detection mechanism relative to the positioning seat to accommodate workpieces of different specifications.

[0013] Preferably, the top of the positioning seat is provided with a placement groove adapted to the shape of the workpiece, the middle of the placement groove is provided with a positioning boss for inserting into the center hole of the workpiece, and the placement groove is also provided with a positioning pin for inserting into the assembly hole of the workpiece.

[0014] Preferably, the clamping mechanism includes a rotary drive and a pressure block. The rotary drive drives the pressure block to rotate in the horizontal plane to achieve clearance or clamping, and it is movable in the vertical direction to clamp the workpiece.

[0015] Preferably, the rotary drive component is a rotary cylinder, which is vertically mounted on the worktable, with its piston rod extending upward and connected to a swing arm, and a pressure block installed at the end of the swing arm.

[0016] Preferably, the number of the detection mechanisms is the same as the number of oil holes on the workpiece, and they are set up in a one-to-one correspondence.

[0017] In a second aspect, the present invention provides a method for detecting oil holes using the above-mentioned detection equipment, comprising the following steps:

[0018] (1) Place the workpiece on the positioning seat and complete the initial positioning;

[0019] (2) Control the action of the clamping mechanism to clamp the workpiece axially;

[0020] (3) Control the main drive components of multiple detection mechanisms to move synchronously, and drive the detection rod to feed to the corresponding oil hole for detection;

[0021] (4) After the test is completed, the main drive component retracts, the push rod and the test bar are reset, the clamping mechanism is released, and the workpiece is taken out.

[0022] Preferably, the oil hole diameter is determined by the insertion depth of the detection rod, and the position is determined by whether the detection rod can be smoothly inserted into the oil hole.

[0023] Preferably, if the detection rod can be smoothly inserted to a preset depth and the stroke of the main drive is within the set range, the oil hole diameter is determined to be qualified; if the detection rod is inserted too deeply, causing the main cylinder stroke to exceed the limit, the oil hole diameter is determined to be too large; if the detection rod is blocked from insertion or cannot be inserted due to positional deviation, resulting in insufficient main cylinder stroke, the oil hole diameter is determined to be too small or the oil hole position is unqualified; if the detachable plug-in connector separates during the retraction of the main drive, the corresponding oil hole diameter is also determined to be too small and unqualified, and the stuck detection rod is manually removed.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention uses a tapered testing rod to replace the traditional go / no-go gauge. Combined with the main cylinder stroke control, it can not only detect whether the diameter of the oil hole is qualified, but also detect whether the position of the oil hole is qualified by whether the testing rod can be smoothly inserted into the oil hole.

[0026] 2. This invention achieves simultaneous detection of multiple oil holes in one go through multiple detection mechanisms in a circumferential array, eliminating the need for manual operation one by one and greatly improving detection efficiency; it also eliminates human interference, and the detection results are objective, quantitative, and have small detection errors and high precision.

[0027] 3. The design of the detachable plug-in connector in this invention acts as a safety fuse. If the detection rod gets stuck due to its small aperture, the detachable plug-in connector will automatically separate, cutting off the rigid connection between the main cylinder and the detection rod, thus avoiding the risk of damage to the workpiece and the detection rod. The automatic separation of the detachable plug-in connector at which station indicates which oil hole is unqualified, making it easy for operators to quickly locate the defect in the workpiece and intuitively pinpoint the fault. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure in one working state of the present invention;

[0030] Figure 3 This is a schematic diagram of another working state of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a detection mechanism according to the present invention;

[0032] Figure 5 This is a schematic diagram of the detachable plug-in connector structure of a detection mechanism according to the present invention.

[0033] Figure 6 This is a schematic diagram of the positioning base of the present invention;

[0034] Figure 7 This is a physical image of the workpiece of the present invention;

[0035] As shown in the figure:

[0036] 1. Worktable, 2. Workpiece, 3. Positioning seat, 4. Positioning boss, 5. Positioning pin, 6. Pressure block, 7. Rotary drive component, 8. Swing arm, 9. Main drive component, 10. Push rod, 11. Detector bar, 12. Separable plug-in connector, 13. Vertical plate, 14. Spring, 15. Mounting plate, 16. Support column, 17. Support plate, 18. Arc-shaped through hole, 19. Start button. Detailed Implementation

[0037] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0038] like Figure 1-6 As shown, the present invention includes a worktable 1, a positioning seat 3 mounted on the worktable 1 for supporting and positioning the workpiece 2 to be inspected, a pressing mechanism disposed above the positioning seat 3 for pressing and positioning the workpiece 2 on the positioning seat 3 from the axial direction of the workpiece 2, and a plurality of detection mechanisms arranged in a circumferential array along the positioning seat 3, each of the detection mechanisms corresponding to an oil hole.

[0039] The top of the positioning seat 3 is provided with a placement groove that matches the shape of the workpiece 2. The middle of the placement groove is provided with a positioning boss 4 for inserting into the center hole of the workpiece 2. The placement groove is also provided with a positioning pin 5 for inserting into the assembly hole of the workpiece 2. The initial positioning of the workpiece 2 is achieved through the cooperation of the placement groove, the positioning boss 4 and the positioning pin 5.

[0040] The clamping mechanism includes a rotary drive 7 and a clamping block 6. The rotary drive 7 drives the clamping block 6 to rotate in the horizontal plane to achieve displacement or clamping, and it is movable in the vertical direction to clamp the workpiece 2. Specifically, the rotary drive 7 is a rotary cylinder, which is vertically mounted on the worktable 1. Its piston rod extends upward and is connected to a swing arm 8, and the clamping block 6 is installed at the end of the swing arm 8. During operation, the rotary cylinder drives the swing arm 8 to rotate horizontally by 90 degrees to directly above the workpiece 2. Then, the piston rod moves downward, causing the clamping block 6 to clamp the upper surface of the workpiece 2, thereby fixing the workpiece 2 axially.

[0041] The detection mechanism includes a main drive component 9, a push rod 10, and a detection rod 11. The output end of the main drive component 9 is connected to the push rod 10 via a detachable plug-in connector 12. The detection rod 11 is connected to the front end of the push rod 10. The main drive component 9 drives the push rod 10 to feed the detection rod 11 towards the oil hole, and the quality of the oil hole is detected by the insertion state of the detection rod 11. The detection rod 11 is a tapered columnar structure, with its front end diameter smaller than its rear end diameter, meaning that the diameter of the detection rod 11 gradually increases along the insertion direction.

[0042] In this embodiment, the main drive component 9 is the main cylinder, fixed to the mounting plate 15. A vertical plate 13 is fixed to the mounting plate 15, and a through hole for the push rod 10 to pass through is provided on the vertical plate 13. The front end of the push rod 10 passes through the vertical plate 13 and connects to the detection rod 11. A spring 14 is sleeved on the push rod 10 between the detachable plug-in connector 12 and the vertical plate 13. The spring 14 provides cushioning during the detection process and drives the push rod 10 to reset after the detection is completed.

[0043] The detachable plug-in connector 12 includes a first plug and a second plug that plug into each other. The first plug is connected to the piston rod of the main drive component 9, and the second plug is connected to the push rod 10. The first plug and the second plug are fixed together by the engagement of a protrusion and a groove. When the detection rod 11 gets stuck in the oil hole due to its small diameter, the pulling force generated by the retraction of the main drive component 9 causes the detachable plug-in connector 12 to separate, thereby disconnecting the power transmission between the main drive component 9 and the push rod 10, separating the main cylinder piston rod from the push rod 10, and preventing damage to the workpiece 2 and the detection rod 11.

[0044] The bottom of the mounting plate 15 is connected to the support plate 17 via the support column 16, and the support plate 17 is mounted on the worktable 1. An arc-shaped through hole 18 is made on the worktable 1, and the support plate 17 is locked onto the worktable 1 by bolts passing through the arc-shaped through hole 18. Loosening the bolts allows for fine adjustment of the angle position of the detection mechanism relative to the positioning seat 3 to accommodate workpieces 2 of different specifications.

[0045] A start button 19 is installed on the workbench 1. A sensor for detecting the position of the piston rod of the main cylinder is installed on the main cylinder. The sensor is a magnetic induction proximity switch, which is connected to the input circuit of the programmable logic controller (PLC). The output circuit of the PLC is connected to the alarm circuit. The installation method of the magnetic induction switch, the stroke monitoring principle, the connection relationship with the PLC, and the connection relationship between the PLC and the alarm are all existing technologies and will not be described in detail here. A standard stroke range is preset in the PLC system; both exceeding the stroke limit and insufficient stroke will trigger an alarm.

[0046] If the oil hole diameter is too large, causing the detection rod 11 to be inserted too deeply, and the extension length of the main cylinder piston rod exceeds the set upper limit, the sensor will transmit a signal to the programmable logic controller, triggering the alarm and determining it as unqualified. If the oil hole diameter is too small or the oil hole position is inaccurate, causing the detection rod 11 to be blocked from insertion, and the main cylinder piston rod fails to reach the preset qualified position (i.e., insufficient stroke), the alarm will be triggered and it will be determined as unqualified.

[0047] The method for detecting oil holes using the above-mentioned testing equipment includes the following steps:

[0048] (1) Place workpiece 2 on positioning seat 3 and complete the initial positioning;

[0049] (2) Control the action of the clamping mechanism to clamp the workpiece 2 axially;

[0050] (3) Control the main drive component 9 of multiple detection mechanisms to move synchronously, and drive the detection rod 11 to feed to the corresponding oil hole for detection;

[0051] (4) After the test is completed, the main drive component 9 retracts, the push rod 10 and the detection rod 11 are reset, the clamping mechanism is released, and the workpiece 2 is taken out.

[0052] The insertion depth of the detection rod 11 is used to determine whether the diameter of the oil hole is qualified, and whether the position is qualified is determined by whether the detection rod 11 can be smoothly inserted into the oil hole. If the detection rod 11 can be smoothly inserted into the preset depth and the stroke of the main drive 9 is within the set range, the diameter of the oil hole is qualified. If the detection rod 11 is inserted too deeply, causing the stroke of the main cylinder to exceed the limit, the diameter of the oil hole is determined to be too large. If the insertion of the detection rod 11 is blocked or cannot be inserted due to positional deviation, resulting in insufficient stroke of the main cylinder, the diameter of the oil hole is determined to be too small or the position of the oil hole is unqualified. If the separable plug-in connector 12 separates during the retraction of the main drive 9, the corresponding oil hole diameter is also determined to be too small and unqualified, and the stuck detection rod 11 is manually removed.

[0053] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A powder metallurgy automotive rotor oil hole detection device, characterized in that: It includes a worktable, a positioning seat mounted on the worktable for supporting and positioning the workpiece to be inspected, a clamping mechanism disposed above the positioning seat for pressing and positioning the workpiece on the positioning seat from the axial direction of the workpiece, and a plurality of detection mechanisms arranged in a circumferential array along the positioning seat, each of the detection mechanisms corresponding to an oil hole. The detection mechanism includes a main drive unit, a push rod, and a detection rod. The output end of the main drive unit is connected to the push rod via a detachable plug-in connector. The detection rod is connected to the front end of the push rod. The main drive unit drives the push rod to feed the detection rod towards the oil hole, so as to detect the oil hole through the insertion state of the detection rod.

2. The powder metallurgy automotive rotor oil hole detection equipment according to claim 1, characterized in that: The detection rod is a tapered columnar structure with a front diameter smaller than its rear diameter; a spring is fitted on the push rod, which provides buffering during the detection process and reset power after the detection.

3. The powder metallurgy automotive rotor oil hole detection equipment according to claim 1, characterized in that: The detachable plug-in connector includes a first plug and a second plug that are plugged into each other. The first plug is connected to the output end of the main drive unit, and the second plug is connected to the push rod. The first plug and the second plug are plugged in and fixed by the cooperation of a protrusion and a groove.

4. The powder metallurgy automotive rotor oil hole detection equipment according to claim 1, characterized in that: The main drive component is the main cylinder, which is fixed on the mounting plate. A vertical plate is fixed on the mounting plate, and a through hole is provided on the vertical plate for the push rod to pass through. The front end of the push rod passes through the vertical plate and is connected to the detection rod.

5. The powder metallurgy automotive rotor oil hole detection equipment according to claim 1, characterized in that: The top of the positioning seat is provided with a placement groove that matches the shape of the workpiece. The middle of the placement groove is provided with a positioning boss for inserting into the center hole of the workpiece. The placement groove is also provided with a positioning pin for inserting into the assembly hole of the workpiece.

6. The powder metallurgy automotive rotor oil hole detection equipment according to claim 1, characterized in that: The clamping mechanism includes a rotary drive and a pressure block. The rotary drive drives the pressure block to rotate in the horizontal plane to achieve clearance or clamping, and it can move in the vertical direction to clamp the workpiece.

7. The powder metallurgy automotive rotor oil hole detection equipment according to claim 6, characterized in that: The rotary drive component is a rotary cylinder, which is vertically mounted on the worktable. Its piston rod extends upward and is connected to a swing arm, and the pressure block is installed at the end of the swing arm.

8. The powder metallurgy automotive rotor oil hole detection equipment according to claim 1, characterized in that: The number of detection mechanisms is the same as the number of oil holes on the workpiece, and they are set up in a one-to-one correspondence.

9. A method for detecting oil holes using the detection equipment according to any one of claims 1-8, characterized in that, Includes the following steps: (1) Place the workpiece on the positioning seat and complete the initial positioning; (2) Control the action of the clamping mechanism to clamp the workpiece axially; (3) Control the main drive components of multiple detection mechanisms to move synchronously, and drive the detection rod to feed to the corresponding oil hole for detection; (4) After the test is completed, the main drive component retracts, the push rod and the test bar are reset, the clamping mechanism is released, and the workpiece is taken out.

10. The method according to claim 9, characterized in that: The insertion depth of the test rod determines whether the diameter of the oil hole is up to standard, and the ability of the test rod to be smoothly inserted into the oil hole determines whether the position is up to standard.

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