Mechanism for machining end face of cam shaft

Abstract

The utility model discloses a cam shaft end face machining mechanism which comprises a sand strip, a clamping seat, a guide seat, a push-pull rod and a stroke-adjustable air cylinder, the sand strip is used for grinding the end face of a cam shaft, the push-pull rod penetrates through the stroke-adjustable air cylinder, the stroke-adjustable air cylinder drives the push-pull rod to move horizontally, the sand strip is installed on the clamping seat, and the guide seat is installed on the clamping seat. The clamping seat is installed on the guide seat, the guide seat is connected to the two guide rods in a sliding mode, the two guide rods are installed on the stroke-adjustable air cylinder, the guide seat is connected with the head end of the push-pull rod through the locking rod, and the guide seat is connected with the push-pull rod through the spring and the gasket. And the required roughness is achieved. The end face grinding machine is simple in implementation structure, is arranged at the tail frame part of equipment, automatically pushes the pull rod to extend out after the end face grinding wheel grinds, and grinds the end face by the grinding strip, meets the requirement on the roughness of the end face of a product, cancels the manual operation, and has very strong practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of camshaft end face machining, in particular to a mechanism for camshaft end face machining. Background Technique

[0002] As Figure 1 shown, there is a camshaft 12. The tail end of the camshaft has two end faces, namely end face A and end face B. The axial dimensions of the two end faces have relatively high requirements (tolerance 0.1 mm). These two end faces need to be machined at one time, which can not only ensure the axial dimension but also improve the efficiency. However, the roughness requirements of the two end faces are different, which are Ra0.8 mm and Ra1.6 - 3.2 mm respectively. For grinding products, the roughness of one-time grinding must be the same. Therefore, the current operation method is that after grinding, it needs to be manually filed with a file. Such an operation method has low efficiency, a risk of missed machining, and it is not easy to ensure the roughness. However, if it is ground twice, the efficiency will be affected and the axial dimension is not easy to ensure. Therefore, the current machining method needs to be improved. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a mechanism for camshaft end face machining, which solves the problems of low machining efficiency and the risk of missed machining in the existing machining method for the two end faces at the tail end of the camshaft.

[0004] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0005] The utility model is a mechanism for camshaft end face machining, including abrasive strips, a clamping seat, a guide seat, a push-pull rod, and an adjustable-stroke cylinder. The abrasive strips are used for grinding the camshaft end face. The push-pull rod passes through the adjustable-stroke cylinder, and the adjustable-stroke cylinder drives the push-pull rod to move horizontally. The abrasive strips are installed on the clamping seat, the clamping seat is installed on the guide seat, the guide seat is slidably connected to two guide rods, the two guide rods are installed on the adjustable-stroke cylinder, the guide seat is connected to the head end of the push-pull rod through a locking rod, and the guide seat and the push-pull rod are connected by a spring and a gasket.

[0006] Preferably, a positioning groove is arranged in the guide seat, a gasket is arranged outside the push-pull rod, a spring is arranged between the positioning groove and the gasket, and the spring is sleeved outside the push-pull rod. After adjusting the locking rod, the deformation amount of the spring can be changed.

[0007] Preferably, both ends of the abrasive strips are electroplated with a diamond / CBN coating composite coating, and the coating particle size is 60 - 80#.

[0008] Preferably, a copper sleeve is inlaid on the inner wall of the guide seat. The copper sleeve is sleeved outside the guide rod and is slidably connected to the guide rod.

[0009] Preferably, an adjusting nut is provided on the tail end screw of the push rod, and the telescopic length of the push rod is adjustable by the adjusting nut.

[0010] Preferably, a longitudinally arranged waist-shaped hole is provided on the guide seat, two internal thread grooves are provided in the clamping seat, and a locking screw is threadedly connected to the back of the clamping seat after passing through the waist-shaped hole.

[0011] The utility model has the following beneficial effects: By reforming an adjustable stroke cylinder, the utility model utilizes its two guide rods, a push rod, and an adjustable nut. The abrasive strip is installed on the clamping seat, the clamping seat is fixed on the guide seat, the guide seat is installed on the two guide rods of the cylinder, and is connected by the push rod and slides on the guide rods. By ventilating the cylinder, the abrasive strip moves forward and backward, so as to process the end face of the camshaft. In order to avoid the direct hard contact between the abrasive strip and the workpiece through air pressure, a spring is installed between the guide seat and the push rod for flexible contact. After grinding the two end faces of the tail end of the camshaft with a grinding wheel, then use the abrasive strip to file one of the end faces, automatically completing the processing and canceling the manual filing process; improving the efficiency and ensuring the roughness effect. At the same time, the risk of missed processing (manual filing) is avoided. This method has a scientific and reasonable principle, changes the original conventional processing method (manual filing), improves the efficiency, and ensures the stability of the quality (roughness). This mechanism has a low manufacturing cost and obvious effects. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the camshaft in Embodiment 1;

[0013] Figure 2 It is a three-dimensional view of a mechanism for machining the end face of a camshaft in Embodiment 1;

[0014] Figure 3 It is a top view of a mechanism for machining the end face of a camshaft in Embodiment 1;

[0015] Figure 4 It is a structural reference diagram when a mechanism for machining the end face of a camshaft in Embodiment 1 is installed on the tailstock of a machine tool.

[0016] Reference Signs:

[0017] Abrasive strip; 101, diamond / CBN coating composite coating; 2, clamping seat; 3, guide seat; 4, locking rod; 5, copper bushing; 6, gasket; 7, spring; 8, guide rod; 9, push rod; 10, locking nut; 11, adjustable stroke cylinder; 301, positioning groove; 302, waist-shaped hole; 303, internal thread groove; 304, locking screw; 12, camshaft; 13, tailstock of machine tool. Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model. Embodiment

[0019] Please refer to Figures 1-4 As shown, a mechanism for machining the end face of a camshaft disclosed in this embodiment includes a sand strip 1, a clamping seat 2, a guide seat 3, a push-pull rod 9, and an adjustable-stroke cylinder 11. The sand strip 1 is used for grinding the end face of the camshaft. The push-pull rod 9 passes through the adjustable-stroke cylinder 11, and the adjustable-stroke cylinder 11 drives the push-pull rod 9 to move horizontally. The sand strip 1 is installed on the clamping seat 2, the clamping seat 2 is installed on the guide seat 3, the guide seat 3 is slidably connected to two guide rods 8, the two guide rods 8 are installed on the adjustable-stroke cylinder 11, the guide seat 3 is connected to the head end of the push-pull rod 9 through a locking rod 4, and the guide seat 3 and the push-pull rod 9 are connected by a spring 7 and a gasket 6.

[0020] Preferably, a positioning groove 301 is provided in the guide seat 3, a gasket 6 is provided outside the push-pull rod 9, a spring 7 is provided between the positioning groove 301 and the gasket 6, and the spring 7 is sleeved outside the push-pull rod 9. After adjusting the locking rod 4, the deformation amount of the spring 7 can be changed; at the same time, by using this spring 7, it is avoided that the sand strip 1 and the machined end face are in direct hard contact with the cylinder pressure, but instead are in flexible contact using the spring force, thereby ensuring the machining axial dimension and roughness effect.

[0021] Preferably, both ends of the sand strip 1 are electroplated with a diamond / CBN coating composite coating 101, the coating particle size is 60 - 80#, and the roughness after machining meets Ra1.6 - 3.2 or Rz8 - 25.

[0022] Preferably, a copper sleeve 5 is inlaid on the inner wall of the guide seat 3. The copper sleeve 5 is sleeved outside the guide rod 8 and is slidably connected to the guide rod 8. The guide seat 3 slides on the guide rod 8 through the inner-wall copper guide sleeve 5. By using this copper sleeve 5, the wear resistance is improved. At the same time, if it is worn, only the copper sleeve 5 needs to be replaced, and there is no need to replace the guide seat 3 (the cost of the guide seat 3 is high), which saves costs;

[0023] Preferably, an adjusting nut 10 is provided on the tail end screw of the push rod 9, which is convenient for adjusting the contact pressure between the abrasive strip and the machining surface after the axial feed of the abrasive strip, ensuring the roughness. The telescopic length of the push rod 9 can be adjusted by the adjusting nut 10, that is, the pressure between the abrasive strip 1 and the machining end face can be adjusted. According to the roughness result of the end face of the abrasive strip after sanding, the pressure is adjusted to make the roughness meet the requirements. At the same time, ensure that the axial dimension is qualified.

[0024] Preferably, a longitudinally arranged kidney-shaped hole 302 is provided on the guide seat 3, two internal thread grooves 303 are provided in the clamp seat 2, and a locking screw 304 is threadedly connected through the kidney-shaped hole 302 on the back of the clamp seat 2, so that the clamp seat 2 can be adjusted in the up and down position, thereby adjusting the height of the abrasive strip 1 to ensure that the entire machined end face of the camshaft can be machined.

[0025] In this embodiment, the guide rod 8 and the push rod 9 are both modified from standard adjustable stroke cylinders 11; this saves the manufacturing cost and at the same time the accuracy meets the requirements.

[0026] The diamond / CBN coating composite coating 101 on the end face of the abrasive strip 1 is used to file the end face of the shaft, so as to achieve the required roughness.

[0027] The guide seat 3 is connected to the push rod 9 through the locking rod 4. The air pressure is used to push the push rod 9 forward and backward, so as to push the abrasive strip 1 into contact with the end face of the workpiece to be machined for machining. The guide seat 3 and the push rod 9 are connected by a spring 7 and a gasket 6. By using this spring 7, it is avoided that the abrasive strip 1 directly contacts the machining end face with the hard pressure of the cylinder, but uses the spring force for flexible contact, so as to ensure the machining axial dimension and roughness effect;

[0028] During specific use, this structure is installed at the tailstock 13 of the machine tool. After the two end faces A and B are ground by the grinding wheel, the abrasive strip 1 automatically extends to file one of the end faces B, completing the automatic machining and canceling the manual filing of the end face process. The machining efficiency is improved, the product quality requirements are met, and at the same time, the function of preventing missed machining is achieved. First, the push rod 9 is pushed to make the abrasive strip 1 move forward and backward by passing air through the cylinder. The diamond / CBN coating on the end face of the abrasive strip 1 is used to file the end face of the shaft, so as to achieve the required roughness. At the same time, a spring is installed between the guide seat and the push rod, avoiding the direct hard contact between the abrasive strip and the workpiece through air pressure, which is a flexible contact, ensuring the axial dimensions and roughness of the A and B surfaces. After the two end faces A and B of the camshaft are ground by the grinding wheel, the abrasive strip 1 is used to file one of the end faces B, automatically completing the machining and canceling the manual filing process. The efficiency is improved and the roughness effect is ensured. At the same time, the risk of missed machining (manual filing) is avoided. The principle of this method is scientific and reasonable, changing the original conventional machining method (manual filing), improving the efficiency, and ensuring the stability of the quality (roughness). The manufacturing cost of this mechanism is low and the effect is obvious.

[0029] The above are only the preferred embodiments of the present utility model and do not limit the present utility model. Any modification to the technical solutions recorded in the foregoing embodiments, any equivalent replacement of some technical features, and any modification, equivalent replacement, or improvement made shall fall within the protection scope of the present utility model.

Claims

1. A mechanism for machining the end face of a camshaft, comprising a sand strip (1), a clamping seat (2), a guide seat (3), a push-pull rod (9), and an adjustable-stroke cylinder (11). The sand strip (1) is used for grinding the end face of the camshaft. The push-pull rod (9) passes through the adjustable-stroke cylinder (11), and the adjustable-stroke cylinder (11) drives the push-pull rod (9) to move horizontally. It is characterized in that: The abrasive strip (1) is installed on the clamping seat (2), the clamping seat (2) is installed on the guiding seat (3), the guiding seat (3) is slidably connected to two guiding rods (8), the two guiding rods (8) are installed on the adjustable stroke cylinder (11), the guiding seat (3) is connected to the head end of the push-pull rod (9) through the locking rod (4), and the guiding seat (3) and the push-pull rod (9) are connected by a spring (7) and a gasket (6).

2. The mechanism for machining the end face of a camshaft according to claim 1, characterized in that: A positioning groove (301) is arranged in the guiding seat (3), the gasket (6) is arranged outside the push-pull rod (9), the spring (7) is arranged between the positioning groove (301) and the gasket (6), and the spring (7) is sleeved outside the push-pull rod (9). The deformation amount of the spring (7) can be changed after adjusting the locking rod (4).

3. A mechanism for machining the end face of a camshaft according to claim 1, characterized in that: Both ends of the abrasive strip (1) are electroplated with a diamond / CBN coating composite coating (101), and the coating particle size is 60-80#.

4. A mechanism for machining the end face of a camshaft according to claim 1, characterized in that: A copper sleeve (5) is inlaid on the inner wall of the guiding seat (3), the copper sleeve (5) is sleeved outside the guiding rod (8), and is slidably connected to the guiding rod (8).

5. A mechanism for machining the end face of a camshaft according to claim 1, characterized in that: An adjusting nut (10) is equipped on the screw rod at the tail end of the push-pull rod (9), and the telescopic length of the push-pull rod (9) can be adjusted and set by the adjusting nut (10).

6. The mechanism for machining the end face of a camshaft according to claim 1, characterized in that: A longitudinally arranged kidney-shaped hole (302) is arranged on the guiding seat (3), two internal thread grooves (303) are arranged in the clamping seat (2), and a locking screw (304) is threadedly connected after passing through the kidney-shaped hole (302) on the back of the clamping seat (2).

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