Camshaft post-grinding cleaning device

Abstract

The present application relates to a camshaft post-grinding cleaning device, which belongs to the field of camshaft production and processing. The device includes a frame, a clamp assembly is rotatably provided on the frame, and the clamp assembly is used to clamp the camshaft and rotate it relative to the frame. The device includes a wiping frame, and the wiping frame is provided with a wiping assembly and a detection assembly. The wiping assembly includes a wiping strip, and the detection assembly includes a tension sensor. The middle part of the wiping strip abuts against the side wall of the camshaft, and the tension sensor is used to detect the magnitude of the tension exerted on the two ends of the wiping strip. During the rotation of the camshaft, the surface contacts the wiping strip and rubs against it. When the wiping strip contacts the burr on the camshaft surface, the wiping strip will be subjected to a dragging force in the tangential direction of the camshaft rotation direction. At this time, the magnitude of the tension exerted on the two ends of the wiping strip is inconsistent and is sensed by the detection assembly, thereby achieving the purpose of detecting surface burr defects on the camshaft.

Description

Technical Field

[0001] The present application relates to the field of camshaft production and processing, and in particular to a camshaft post-grinding cleaning device. Background Art

[0002] The camshaft is a component in a piston engine that controls the opening and closing of the valves. The camshaft mainly consists of a shaft, a journal and a cam, and the shaft, journal and cam are integrally formed. When in use, the lobe of the cam collides with the piston rod to achieve the function of opening and closing the valves.

[0003] Transforming a steel billet into a camshaft requires five steps: turning, milling, drilling, testing, and grinding. Surface treatment, such as pickling, is then performed to improve the camshaft's physical and chemical properties. After surface treatment, the camshaft surface is cleaned and wiped, followed by oiling and packaging.

[0004] During the wiping process, the camshaft is fixed to a rotating fixture and rotated on a fixed axis. The operator holds a dry cloth and brings it into contact with the side wall of the camshaft. As the camshaft rotates, the cloth is continuously moved along the axial direction of the camshaft, ensuring that the entire side wall of the camshaft is wiped with the cloth. This process also serves to inspect the camshaft surface for burrs. When a burr on the camshaft contacts the cloth, the cloth is immediately pulled and sensed by the operator. Based on the feedback, the operator then takes further action to address the burr on the camshaft.

[0005] In summary, since the operator always holds the cloth and continuously applies force during the wiping process, the operator's perception and sensitivity will decrease over time, making it difficult to detect the cloth pulling caused by relatively small burrs, resulting in a decrease in the accuracy of burr detection. Summary of the Invention

[0006] In order to improve the above problems, the present application provides a camshaft post-grinding cleaning device.

[0007] The present application provides a camshaft post-grinding cleaning device that adopts the following technical solution:

[0008] A camshaft post-grinding cleaning device includes a frame, a clamp assembly is rotatably provided on the frame, the clamp assembly is used to clamp the camshaft and rotate it relative to the frame, and includes a wiping frame, a wiping assembly and a detection assembly are provided on the wiping frame, the wiping assembly includes a wiping strip, the detection assembly includes a tension sensor, the middle part of the wiping strip abuts against the side wall of the camshaft, and the tension sensor is used to detect the magnitude of the tension applied to both ends of the wiping strip.

[0009] Preferably, a plurality of the wiping strips are provided along the axial direction of the camshaft, the number of detection points of the tension sensor is twice the number of the wiping strips, and a single tension sensor is connected to one end of a single wiping strip.

[0010] Preferably, a self-adjusting spring is connected between the tension sensor and the end of the wiping strip.

[0011] Preferably, the wiping assembly further comprises a limiting wire, which passes through a plurality of adjacent wiping strips, the length direction of the limiting wire being perpendicular to the length direction of the wiping strip, and a limiting ball is provided at the end of the limiting wire, which abuts against the side wall of the wiping strip.

[0012] Preferably, the wiping strip is provided with a waist-shaped hole for the limiting wire to pass through, and the length direction of the waist-shaped hole is consistent with the length direction of the wiping strip.

[0013] Preferably, the limiting wire is detachably connected to the limiting ball, the end of the limiting wire is fixedly connected with a stop hook, and the limiting ball is provided with a loading and unloading through hole for the end of the limiting wire to pass through. After the end of the limiting wire passes through the limiting ball, the stop hook is located on the side of the limiting ball away from the wiping strip.

[0014] Preferably, the wiping frame is slidably connected to the frame, and the sliding direction is the axial direction of the camshaft; a traction rope is connected between the wiping frame and the wiping assembly, and the wiping strip at the front end along the moving direction of the wiping frame is fixedly connected to the traction rope.

[0015] Preferably, the number of the traction ropes is two, and the wiping frame is slidably connected to two adjustment blocks, a single adjustment block is fixedly connected to one end of a traction rope away from the wiping strip, and the wiping frame is rotatably connected to an adjustment screw, and the adjustment screw is threadedly connected to the two adjustment blocks.

[0016] Preferably, the wiping assembly further comprises a wiping sheet, which is located between the two wiping strips and fixedly connected to the wiping strips, and the connection point between the wiping strips and the wiping sheet is located on the side of the limiting ball facing the camshaft.

[0017] Preferably, the wiping strip and the wiping sheet are made of aramid.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. Through the arrangement of the wiping strip and the detection component, during the rotation of the camshaft, the surface contacts the wiping strip and rubs against it. When the wiping strip contacts the burrs on the camshaft surface, the wiping strip will be subjected to a drag force tangential to the direction of camshaft rotation. At this time, the pulling forces at both ends of the wiping strip are inconsistent and are sensed by the detection component, achieving the purpose of detecting surface burr defects on the camshaft;

[0020] 2. Through the setting of the traction rope, the wiping frame can actively apply a pulling force to the wiping strip at the front end away from the camshaft, so that the wiping component can more smoothly cross the shoulder structure on the camshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the camshaft post-grinding cleaning device in the embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the explosion structure of a single set of wiping strips, limiting wires and limiting balls in an embodiment of the present application.

[0023] Figure 3 It is a schematic diagram of the structure of a single set of wiping strips in an embodiment of the present application, which is used to reflect the mutual cooperation of the limiting wires and the limiting balls.

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure used to illustrate the cleaning of the camshaft surface by the wiping component in the embodiment of the present application.

[0025] Explanation of the accompanying reference numerals: 1. Frame; 12. Clamp assembly; 2. Wiping rack; 21. Adjusting block; 22. Pulling rope; 23. Adjusting screw; 3. Wiping assembly; 31. Wiping strip; 311. Waist-shaped hole; 32. Wiping piece; 33. Limiting wire; 331. Anti-retraction hook; 34. Limiting ball; 341. Loading and unloading through hole; 4. Detection assembly; 41. Tension sensor; 42. Self-adjusting spring; 5. Camshaft. 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 camshaft post-grinding cleaning device, such as Figure 1 As shown, it includes a frame 1, on which a clamp assembly 12 and a wiping frame 2 are provided. The clamp assembly 12 is used to clamp the camshaft 5 and make the camshaft 5 rotate relative to the frame 1. The wiping frame 2 is provided with a wiping assembly 3 and a detection assembly 4. The wiping assembly 3 is used to wipe the surface of the camshaft 5, and the detection assembly 4 is used to detect the force condition of the wiping assembly 3.

[0028] like Figure 1As shown, the clamp assembly 12 is a three-jaw chuck that clamps the camshaft 5 and rotates it around a fixed axis. The wiping frame 2 is slidably connected to the frame 1, and the sliding direction is parallel to the rotation axis of the camshaft 5. The sliding mechanism of the wiping frame 2 is similar to that of an electric slide. The wiping assembly 3 includes a wiping strip 31 and a wiping sheet 32. The wiping strip 31 is an aramid cloth strip with a diameter of 4-5 mm, and the wiping sheet 32 ​​is a thin aramid cloth. There are ten wiping strips 31 and two wiping sheets 32. The length direction of the wiping strip 31 is perpendicular to the axis of the camshaft 5. The wiping strips 31 are divided into three groups along the direction of movement of the wiping frame 2. The first and last groups each have three strips, and the middle group has four strips. The two wiping sheets 32 are respectively located between two adjacent groups of wiping strips 31 and are fixedly connected to the wiping strips 31 on both sides of themselves by sewing.

[0029] like Figure 1 、 2 As shown in Figure 3, multiple wiping strips 31 in the same group are closely aligned. The wiping assembly 3 also includes a limiting wire 33. A single limiting wire 33 passes through each wiping strip 31 in the same group in sequence along the axial direction of the camshaft 5. A limiting ball 34 is detachably provided at the end of the limiting wire 33. The limiting ball 34 abuts against the side wall of the wiping strip 31 at the edge of the group. A stop barb 331 is integrally formed at the end of the limiting wire 33. The limiting ball 34 is provided with a loading and unloading through-hole 341 for the end of the limiting wire 33 to pass through. The stop barb 331 can be squeezed to allow it to pass smoothly through the loading and unloading through-hole 341. The stop barb 331 is located on the side of the limiting ball 34 facing away from the wiping strip 31. At this time, the wiping strips 31 in the same group can be stably arranged close to each other.

[0030] like Figure 1 、 2 As shown in Figure 3, the detection assembly 4 includes a tension sensor 41 and a self-adjusting spring 42. The number of detection points of the tension sensor 41 is the same as the number of the self-adjusting spring 42, and both are twice the number of the wiping strips 31. The self-adjusting spring 42 is fixedly connected to the end of the wiping strip 31, and the end of the self-adjusting spring 42 away from the wiping strip 31 is fixedly connected to the detection point of the tension sensor 41. In particular, the end of the wiping strip 31 and the detection points of the self-adjusting spring 42 and the tension sensor 41 correspond one to one. The hole in the wiping strip 31 through which the limit wire 33 passes is a waist-shaped hole 311, and the length direction of the waist-shaped hole 311 is consistent with the length direction of the wiping strip 31. When the force applied to a single wiping strip 31 deviates from the force applied to an adjacent wiping strip 31, the two strips tend to slide relative to each other along their own length. The presence of the waist-shaped hole 311 creates space for a slight relative movement between adjacent wiping strips 31, and the force applied to the wiping strips 31 is less likely to be affected by each other. A single set of wiping strips 31 includes a plurality of limiting wires 33 , which are arranged at regular intervals along the length direction of the wiping strips 31 .

[0031] like Figure 1 and4 As shown, when the wiping assembly 3 is pressed against the sidewall of the camshaft 5, the self-adjusting spring 42 is under tension, which means that each wiping strip 31 and wiping sheet 32 ​​is in a tensile and taut state. The connection point between the wiping strip 31 and the wiping sheet 32 ​​is located on the side of the stop ball 34 facing the camshaft 5. When the wiping frame 2 is constantly moving and the camshaft 5 is not rotating, the wiping strip 31 cannot remain stable for a long time at the edge of each cam. In other words, the structure here is mainly friction by the wiping sheet 32, which can fully wipe the camshaft 5 and detect burrs.

[0032] like Figure 1 As shown, a traction rope 22 is connected between the wiping frame 2 and the wiping assembly 3, and the wiping strip 31 at the front end in the direction of movement of the wiping frame 2 is fixedly connected to the traction rope 22. The traction rope 22 is located on the side of the wiping strip 31 away from the camshaft 5, which provides tension traction for the wiping strip 31, so that the wiping assembly 3 can more smoothly cross the shoulder structure on the camshaft 5 during the process of moving along the camshaft 5, thereby reducing the deformation of the wiping assembly 3 in the axial direction of the camshaft 5. The traction rope 22 is inelastic and has two air portions. Two adjustment blocks 21 are slidably connected to the wiping frame 2. A single adjustment block 21 is fixedly connected to one end of a traction rope 22 away from the wiping strip 31. An adjusting screw rod 23 is rotatably connected to the wiping frame 2. The length direction of the adjusting screw rod 23 is perpendicular to the moving direction of the wiping frame 2. The adjusting screw rod 23 is threadedly connected to the two adjustment blocks 21. The adjusting screw rod 23 is a bidirectional screw rod, and its rotation can control the two adjustment blocks 21 to move toward or away from each other, thereby adjusting the initial downward pulling distance of the traction rope 22 on the wiping strip 31.

[0033] The implementation principle of a camshaft post-grinding cleaning device according to the embodiment of the present application is as follows:

[0034] First, secure the camshaft 5 with the clamp assembly 12. Adjust the screw 23 so that the front-end wiping strip 31 naturally contacts but does not abut the sidewall of the smallest radial portion of the camshaft 5. Then, the machine can begin operation. The three-jaw chuck begins to rotate, the wiping frame 2 begins to slide, and the wiping assembly 3 sequentially sweeps across the sidewalls of the camshaft 5, wiping and inspecting the surface for burrs. If the inspection assembly 4 detects a momentary deviation in the force applied to either end of a wiping strip 31, the machine can be temporarily stopped for manual inspection. To improve the accuracy of burr detection, the three-jaw chuck can be controlled to rotate alternately in forward and reverse directions while the wiping frame 2 moves.

[0035] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A camshaft post-grinding cleaning device, comprising a frame (1), a clamp assembly (12) rotatably provided on the frame (1), the clamp assembly (12) being used to clamp the camshaft (5) and rotate it relative to the frame (1), characterized in that: The invention comprises a wiping frame (2), a wiping assembly (3) and a detection assembly (4) being provided on the wiping frame (2), the wiping assembly (3) comprising a wiping strip (31), the detection assembly (4) comprising a tension sensor (41), the middle portion of the wiping strip (31) being in contact with the side wall of the cam shaft (5), the tension sensor (41) being used to detect the magnitude of the tension exerted on both ends of the wiping strip (31); a plurality of wiping strips (31) being provided along the axial direction of the cam shaft (5), the number of detection points of the tension sensor (41) being twice the number of the wiping strips (31), and a single tension sensor (41) being connected to one end of a single wiping strip (31); The wiping assembly (3) further comprises a limiting wire (33), the limiting wire (33) passes through a plurality of wiping strips (31) adjacent to each other in sequence, the length direction of the limiting wire (33) is perpendicular to the length direction of the wiping strips (31), the end of the limiting wire (33) is provided with a limiting ball (34), the limiting ball (34) abuts against the side wall of the wiping strip (31); the limiting wire (33) and the limiting ball (34) are detachably connected, the end of the limiting wire (33) is fixedly connected with a stop hook (331), the limiting ball (34) is provided with a loading and unloading through hole (341) for the end of the limiting wire (33) to pass through, and after the end of the limiting wire (33) passes through the limiting ball (34), the stop hook (331) is located on the side of the limiting ball (34) away from the wiping strip (31); The wiping frame (2) is slidably connected to the frame (1), and the sliding direction is the axial direction of the camshaft (5); a traction rope (22) is connected between the wiping frame (2) and the wiping assembly (3); the wiping strip (31) arranged at the front end in the direction of movement of the wiping frame (2) is fixedly connected to the traction rope (22); the number of the traction ropes (22) is two, and the wiping frame (2) is slidably connected to two adjustment blocks (21), and a single adjustment block (21) is fixedly connected to one end of the traction rope (22) away from the wiping strip (31); an adjustment screw rod (23) is rotatably connected to the wiping frame (2), and the adjustment screw rod (23) is threadedly connected to the two adjustment blocks (21).

2. The camshaft post-grinding cleaning device according to claim 1, characterized in that: A self-adjusting spring (42) is connected between the tension sensor (41) and the end of the wiping strip (31).

3. The camshaft post-grinding cleaning device according to claim 1, characterized in that: The wiping strip (31) is provided with a waist-shaped hole (311) for the limiting wire (33) to pass through, and the length direction of the waist-shaped hole (311) is consistent with the length direction of the wiping strip (31).

4. The camshaft post-grinding cleaning device according to claim 1, characterized in that: The wiping assembly (3) further comprises a wiping sheet (32), which is located between the two wiping strips (31) and fixedly connected to the wiping strips (31), and the connection point between the wiping strips (31) and the wiping sheet (32) is located on the side of the limiting ball (34) facing the camshaft (5).

5. The camshaft post-grinding cleaning device according to claim 4, characterized in that: The wiping strip (31) and the wiping sheet (32) are made of aramid.

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