Wear-resistant part inner hole machining device and machining method

Abstract

The invention relates to a wear-resistant part inner hole machining device and method, and belongs to the technical field of inner hole defect detection.The wear-resistant part inner hole machining device comprises an outer pipe sleeve, an inner pipe sleeve and a connecting shaft rotationally arranged in the inner pipe sleeve; a plurality of abutting shafts are arranged on the connecting shaft in a sliding mode in the radial direction of the connecting shaft, and a plurality of abutting plates are arranged in the connecting shaft in a sliding mode in the axial direction of the connecting shaft; the end of the abutting shaft makes contact with the end of the abutting plate. Contact switches are arranged at the two ends of the abutting plate respectively. The contact switch is electrically connected with the display lamp and the power supply. A connecting cavity is formed in the connecting shaft; a plurality of through holes are formed in the peripheral side of the connecting shaft; the abutting shaft is slidably arranged in the through hole; the abutting plate is arranged in the connecting cavity in a sliding mode. A first chamfer is formed in the end of the abutting shaft. A second chamfer capable of making contact with the first chamfer is formed in the end of the abutting plate. The method has the effect of improving the inner hole defect detection efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of inner hole defect detection, and in particular to an inner hole processing device and a processing method for wear-resistant parts. Background Art

[0002] During the use of wear-resistant parts, the inner hole may be concave or convex due to wear, corrosion or processing errors. In order to restore its original size and accuracy, timely repair is required. Repair methods usually include: grinding with grinding tools, adding wear-resistant materials to the inner hole surface through laser cladding technology, or using electrospark machining, etc.

[0003] However, since the inside of the wear-resistant part cannot be seen, it is impossible to accurately determine the repair position in the inner hole of the wear-resistant part. The traditional inspection method is to disassemble the part for repair, which is not only time-consuming but also may cause additional damage to the part, resulting in low inner hole inspection efficiency. Summary of the invention

[0004] In order to improve the problem of low efficiency in the inner hole detection process, the present application provides an inner hole processing device and a processing method for wear-resistant parts.

[0005] The present application provides a wear-resistant part inner hole processing device adopts the following technical solution:

[0006] A wear-resistant part inner hole processing device and processing method, comprising an outer tube sleeve, an inner tube sleeve and a connecting shaft rotatably arranged in the inner tube sleeve; a plurality of abutment shafts are arranged on the connecting shaft along its radial sliding direction, and a plurality of abutment plates are arranged in the connecting shaft along its axial sliding direction; the end of the abutment shaft contacts the end of the abutment plate; contact switches are respectively arranged at both ends of the abutment plate; the contact switch is electrically connected to a display light and a power supply.

[0007] Optionally, a connecting cavity is opened in the connecting shaft; a plurality of through holes are opened on the circumferential side of the connecting shaft; the abutment shaft is slidably set in the through holes; the abutment plate is slidably set in the connecting cavity; a chamfer 1 is opened at the end of the abutment shaft; a chamfer 2 which can contact the chamfer 1 is opened at the end of the abutment plate.

[0008] Optionally, a contact groove is provided on the side wall of the abutment plate, and a contact sheet is slidably arranged in the contact groove; and the contact switch is arranged between the contact sheet and the contact groove.

[0009] Optionally, a slope is formed at a top corner of the contact piece; the contact piece abuts against the adjacent abutment plate via the slope.

[0010] Optionally, a return spring three is provided in the contact groove, and the return spring three is fixedly connected to the contact piece and is used for driving the contact piece to return to the outside of the contact groove.

[0011] Optionally, a second reset spring is provided in the connecting cavity, the second reset spring is connected to the abutment plate, and the second reset spring is used to drive the abutment plate to reset toward a direction close to the abutment axis.

[0012] Optionally, a return spring 1 is fixedly provided in the through hole; the return spring 1 is connected to the abutment shaft, and the return spring 1 is used for driving the abutment shaft to return to a direction away from the abutment plate.

[0013] Optionally, a lead screw is rotatably arranged inside the outer tube sleeve; the lead screw is threadedly matched with the inner tube sleeve.

[0014] Optionally, an outer gear ring is fixedly provided on the outer circumferential surface of the connecting shaft, and a transmission gear meshing with the outer gear ring is rotatably provided in the inner sleeve.

[0015] The present application provides a method for machining inner holes of wear-resistant parts using the following technical solution:

[0016] A method for machining inner holes of wear-resistant parts adopts the wear-resistant part inner hole machining device to detect the inner hole defect position.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. Through the direct contact between the abutment shaft and the inner wall of the inner hole, the device can detect small changes in the inner hole surface. When there is a defect on the inner hole wall, the abutment shaft will contact it and trigger the electronic response of the display light, thereby accurately marking the defect location.

[0019] 2. The contact components in the device, such as the contact sheet and the contact groove, are designed so that once the abutment shaft contacts the inner hole defect, the contact sheet will separate from the adjacent abutment plate, triggering the display light to respond. At the same time, the defect can be judged as a pit or a protrusion by the movement direction of the abutment plate. The rapid identification process helps to improve detection efficiency.

[0020] 3. The dial and range-measuring rod equipped with the device provide users with intuitive monitoring means, making the operation process transparent and convenient for real-time adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the inner hole processing device of the wear-resistant part according to the embodiment of the present application.

[0022] Figure 2 It is a cross-sectional view of the inner sleeve of the embodiment of the present application.

[0023] Figure 3It is a cross-sectional view of the connecting shaft of the embodiment of the present application.

[0024] Figure 4 It is a schematic structural diagram of the abutment shaft and the abutment plate according to an embodiment of the present application.

[0025] Figure numerals: 1. outer sleeve; 11. inner sleeve; 12. inner cavity; 13. connecting shaft; 14. lead screw; 15. connecting cavity; 16. outer gear ring; 17. transmission gear; 18. threaded hole; 19. through hole; 2. through hole; 21. abutment shaft; 22. abutment plate; 23. tapered portion; 24. chamfer one; 25. chamfer two; 26. contact groove; 27. contact sheet; 28. inclined surface. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-4 This application is described in further detail.

[0027] The embodiment of the present application discloses a wear-resistant part inner hole processing device and a processing method. The wear-resistant part inner hole processing device comprises an outer tube sleeve 1 and an inner tube sleeve 11 movably arranged in the outer tube sleeve 1. The outer tube sleeve 1 and the inner tube sleeve 11 are both round tubes with closed ends and a cavity inside. The inner tube sleeve 11 is arranged in the outer cavity of the outer tube sleeve 1; the inner tube sleeve 11 can move along the axial direction of the outer cavity.

[0028] A connecting shaft 13 is arranged in the inner sleeve 11 along the axial direction of the inner sleeve 11. The two ends of the connecting shaft 13 are rotatably connected to the two bottom walls of the inner sleeve 11 respectively. A lead screw 14 is coaxially arranged in the connecting shaft 13, and the connecting shaft 13 and the lead screw 14 do not contact each other. Threaded holes 18 for threaded transmission with the lead screw 14 are respectively arranged on the two bottom walls of the inner sleeve 11. A guide bar is fixed on the outer circumference of the inner sleeve 11, and the guide bar is slidably matched with the inner circumference of the outer sleeve 1 to limit the inner sleeve 11 to slide only along the axial direction of the outer sleeve 1. A stepper motor 1 is embedded in the bottom wall on one side of the outer sleeve 1, and the lead screw 14 is coaxially fixed with the output shaft of the stepper motor 1.

[0029] Specifically, the controller of the stepper motor 1 controls the stepper motor 1 to rotate a unit angle every unit time, so that the inner tube sleeve 11 moves a unit distance away from the stepper motor 1 every unit time during the threaded transmission cooperation with the lead screw 14. A distance measuring rod marked with scales is fixedly provided on the inner tube sleeve 11 near the stepper motor 1; the distance measuring rod penetrates the bottom wall of the outer tube sleeve 1 and passes out of the outer tube sleeve 1, and the user can judge the moving distance of the inner tube sleeve 11 according to the reading of the distance measuring rod.

[0030] An outer gear ring 16 is fixedly disposed on the outer circumference of the connecting shaft 13, and a transmission gear 17 meshing with the outer gear ring 16 is rotatably disposed in the inner cavity 12 of the inner sleeve 11. In one embodiment, the transmission gear 17 is rotatably disposed on the inner bottom surface of the inner cavity 12 near the stepper motor 1. A stepper motor 2 is embedded and fixed on the inner bottom wall of the inner sleeve 11 near or away from the stepper motor 1, and the output shaft of the stepper motor 2 is coaxially fixedly connected to the transmission gear 17.

[0031] Specifically, after the controller of the stepper motor 2 is started, it sends a signal to the stepper motor 2 every unit time, so that the stepper motor 2 rotates a unit angle; after sending a preset number of signals, it stops sending. In one embodiment, after the inner tube sleeve 11 stops axial movement, the stepper motor 2 is started, and the connecting shaft 13 is intermittently rotated at the same time interval, and the controller of the stepper motor 2 stops rotating after rotating a preset angle.

[0032] A connecting cavity 15 is provided in the connecting shaft 13 along its axial direction. A plurality of through holes 2 are provided on the circumferential side of the connecting shaft 13 and are respectively connected to the connecting cavity 15. The plurality of through holes 2 are evenly distributed on the outer circumferential surface of the connecting shaft 13 along the circumferential direction of the connecting shaft 13. An abutment shaft 21 is provided in the through hole 2 to slide along the radial direction of the connecting shaft 13; an abutment plate 22 is provided in the connecting cavity 15 to slide along the axial direction of the connecting shaft 13; and the end of the abutment shaft 21 contacts the end of the abutment plate 22.

[0033] It should be noted that both the outer tube sleeve 1 and the inner tube sleeve 11 are provided with a through hole 19 for accommodating the abutment shaft 21 , and the cross section of the through hole 19 is square, so that the abutment shaft 21 can rotate in the through hole 19 .

[0034] A tapered portion 23 is provided at the end of the abutment shaft 21 that is away from the abutment plate 22; when the outer sleeve 1 penetrates into the inner hole, the tapered portion 23 contacts the inner wall of the inner hole. In one embodiment, the tip of the tapered portion 23 is rounded to avoid damage to the inner wall of the inner hole. A chamfer 24 is provided at the end of the abutment shaft 21 that is away from the tapered portion 23 and faces the abutment plate 22. A reset spring 1 is provided in the through hole 2 that is arranged around the abutment shaft 21; the reset spring 1 is connected to the abutment shaft 21, and the reset spring 1 is used to drive the abutment shaft 21 to reset in a direction away from the abutment plate 22.

[0035] The longitudinal section of the abutment plate 22 is arc-shaped, so that the outer peripheral surface of the abutment plate 22 fits the inner wall of the connection cavity 15; in one embodiment, the abutment plate 22 is connected to the inner wall of the connection cavity 15 through a dovetail block. A second reset spring is provided on the inner wall of the connection cavity 15, and the second reset spring is connected to the abutment plate 22. The second reset spring is used to drive the abutment plate 22 to reset in the direction close to the abutment shaft 21. A second chamfer 25 is provided at the end of the abutment plate 22 toward the end close to the abutment shaft 21, and the direction of the second chamfer 25 is toward the direction away from the axis of the connection shaft 13. The abutment shaft 21 contacts the second chamfer 25 of the abutment plate 22 through a first chamfer 24. Specifically, when the abutment shaft 21 moves toward the axis of the connection shaft 13, it will push the abutment plate 22 to move in a direction close to the stepper motor; when the abutment shaft 21 moves in a direction away from the axis of the connection shaft 13, the abutment plate 22 moves in a direction away from the stepper motor. The side walls of two adjacent abutment plates 22 are in contact with each other.

[0036] Specifically, after the outer tube sleeve 1 is extended into the inner hole, several abutment shafts 21 abut against the inner hole wall respectively. Since the abutment shafts 21 have the same length, the ends of several abutment plates 22 facing the abutment shafts 21 are all on the same plane. When there is a depression on the inner hole wall, the abutment shaft 21 can be aligned with the depression by rotating the connecting shaft 13; the abutment shaft 21 is plugged into the depression and moves away from the axis of the connecting shaft 13, and the abutment plate 22 in contact with the abutment shaft 21 moves toward the abutment shaft 21 under the action of the second reset spring, so that a single abutment plate 22 protrudes from the plane composed of several abutment plates 22. When there is a protrusion on the inner hole wall, the abutment shaft 21 and the abutment plate 22 both move in the opposite direction, so that the end of the abutment plate 22 away from the abutment shaft 21 protrudes from the plane composed of several abutment plates 22.

[0037] Contact components are respectively provided at both ends of the abutment plate 22. The contact components include a contact groove 26 at least provided on one side of the abutment plate 22 and a contact piece 27 slidably provided in the contact groove 26 along the width direction of the abutment plate 22. In one embodiment, four groups of contact components are provided on the abutment plate 22, and contact grooves 26 are respectively provided on the two side walls at one end of the abutment plate 22, and contact pieces 27 are provided in the contact grooves 26. A return spring 3 is provided in the contact groove 26, and the return spring 3 is fixedly connected to the contact piece 27, and is used to drive the contact piece 27 to return to the outside of the contact groove 26. When the ends of several abutment plates 22 are in the same plane, the contact piece 27 contacts the side wall of the adjacent abutment plate 22 or the contact piece 27 on the adjacent abutment plate 22, and the contact piece 27 shrinks in the contact groove 26. When there is a depression or a protrusion on the inner hole, the abutment plate 22 protrudes from the plane composed of several abutment plates 22, and the contact piece 27 is separated from the adjacent abutment plate 22, and the contact piece 27 extends out of the contact groove 26.

[0038] Specifically, a limiting piece is fixedly provided on the side wall of the contact piece 27, and a limiting groove for accommodating the limiting piece is provided on the side wall of the contact groove 26, so as to prevent the contact piece 27 from being separated from the contact groove 26. An inclined surface 28 facing the midpoint of the abutment plate 22 is provided at the top corner of the contact piece 27; when the contact piece 27 extending out of the contact groove 26 follows the abutment plate 22 to return to its original position, the contact piece 27 contacts the adjacent abutment plate 22 through the inclined surface 28, and is retracted into the contact groove 26 under the pressure.

[0039] A contact switch is provided between the contact piece 27 and the contact groove 26, and the contact switch is electrically connected to the display light. When the contact piece 27 is separated from the adjacent abutment plate 22, the contact switch is closed, and the display light is powered on and turned on; when the contact piece 27 is in abutment with the adjacent abutment plate 22, the contact switch is disconnected, and the display light is powered off and turned off. Specifically, the contact switches at both ends of the abutment plate 22 are respectively connected to different display lights. When the abutment plate 22 moves toward a direction close to the stepper motor, one of the display lights is turned on; when it moves in the opposite direction, the other display light is turned on; different display lights are used to judge whether the abutment shaft 21 is in contact with the depression or protrusion on the inner hole wall.

[0040] It should be noted that the contact switch includes a switch movable plate and a switch stator that can be electrically contacted with the switch movable plate; it should be noted that the contact switch includes a switch movable plate and a switch stator that can be electrically contacted with the switch movable plate; the switch movable plate and the switch stator are respectively fixed on the side wall of the contact plate 27 and the inner wall of the contact groove 26.

[0041] In one embodiment, the display light is arranged on the connecting shaft 13, and a window for reading the display light is provided on the inner tube sleeve 11 and the outer tube sleeve 1. A dial is provided on the outer tube sleeve 1 for reading the rotation angle of the display light after rotation.

[0042] A specific implementation of the present application includes the following steps:

[0043] Insert the end of the outer sleeve 1 into the inner hole and record the insertion distance of the outer sleeve 1. Start the drive motor 1, which drives the inner sleeve 11 to move. After the inner sleeve 11 stops moving, the drive motor 2 is started and drives the connecting shaft 13 to rotate. Repeat the above process until the indicator light comes on, turn off the drive motor 1 and the drive motor 2, read the dial reading and the rangefinder reading, and determine the concave or convex position in the inner hole.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wear-resistant part inner hole processing device, characterized in that: The invention comprises an outer tube sleeve (1), an inner tube sleeve (11), and a connecting shaft (13) rotatably arranged in the inner tube sleeve (11); a plurality of abutment shafts (21) are slidably arranged in the radial direction of the connecting shaft (13); a plurality of abutment plates (22) are slidably arranged in the axial direction of the connecting shaft (13); the end of the abutment shaft (21) contacts the end of the abutment plate (22); contact switches are respectively arranged at both ends of the abutment plate (22); the contact switches are electrically connected to a display light and a power source.

2. The inner hole processing device of a wear-resistant part according to claim 1, characterized in that: A connecting cavity (15) is provided in the connecting shaft (13); a plurality of through holes (2) are provided on the peripheral side of the connecting shaft (13); the abutting shaft (21) is slidably arranged in the through hole (2); the abutting plate (22) is slidably arranged in the connecting cavity (15); a first chamfer (24) is provided at the end of the abutting shaft (21); and a second chamfer (25) capable of contacting the first chamfer (24) is provided at the end of the abutting plate (22).

3. A wear-resistant part inner hole processing device according to claim 2, characterized in that: A contact groove (26) is provided on the side wall of the abutment plate (22), and a contact sheet (27) is slidably arranged in the contact groove (26); the contact switch is arranged between the contact sheet (27) and the contact groove (26).

4. A wear-resistant part inner hole processing device according to claim 3, characterized in that: An inclined surface (28) is provided at the top corner of the contact piece (27); the contact piece (27) abuts against the adjacent abutment plate (22) via the inclined surface (28).

5. The inner hole processing device for wear-resistant parts according to claim 3, characterized in that: A third return spring is provided in the contact groove (26), and the third return spring is fixedly connected to the contact piece (27) and is used to drive the contact piece (27) to return to the outside of the contact groove (26).

6. The wear-resistant part inner hole processing device according to claim 3, characterized in that: A second return spring is arranged in the connecting cavity (15), the second return spring is connected to the abutment plate (22), and the second return spring is used to drive the abutment plate (22) to return to a direction close to the abutment shaft (21).

7. The inner hole processing device for wear-resistant parts according to claim 3, characterized in that: A return spring 1 is fixedly arranged in the through hole (2); the return spring 1 is connected to the abutment shaft (21), and the return spring 1 is used to drive the abutment shaft (21) to return in a direction away from the abutment plate (22).

8. The wear-resistant part inner hole processing device according to claim 1, characterized in that: A lead screw (14) is rotatably arranged inside the outer tube sleeve (1); the lead screw (14) is threadedly matched with the inner tube sleeve (11).

9. The wear-resistant part inner hole processing device according to claim 1, characterized in that: An outer gear ring (16) is fixedly provided on the outer circumferential surface of the connecting shaft (13), and a transmission gear (17) meshing with the outer gear ring (16) is rotatably provided in the inner sleeve (11).

10. A method for machining inner holes of wear-resistant parts, characterized in that: The inner hole processing device for wear-resistant parts described in any one of claims 1 to 9 is used to detect the position of inner hole defects.

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