KR200446418Y1 - Polishing jig for a cam - Google Patents

Abstract

The present invention relates to a cam lapping polishing jig for processing the cam surface coupled to the rotating chuck while rotating the cam shaft to satisfy the required roughness, and more specifically, the cam shaft on which the cam is built is rotated by rotating the cam shaft. The upper and lower grippers 20 and 20 'while lapping the cam surface while gripping the grip surface 10 and 10' on one side and the cam surface on the other side, respectively, while lapping the cam surface. ), And the upper and lower grippers 20 and 20 'are brackets 25 and 25' having a central shaft 22 coupled to the left and right sides of the base 21 and 21 '. And, on both sides of the bracket (25, 25 ') to form and provide the left and right polishing rolls 26, 27 to rotate to grip the surface of the cam, to grip the cam shaft by the upper and lower grippers Simple rolls allow the polishing rolls to wrap effectively against the cam surface The ease of use, as well as excellently supplied to provide excellently lapping processing efficiency of the cam has its features.

Cam, Lapping, Grinding Jig, X-shape, Rotary Chuck, Surface Roughness

Description

Polishing jig for a cam {Polishing jig for a cam}

The present invention relates to a cam lapping processing jig for machining the cam surface coupled to the rotating chuck while rotating the cam shaft to the cam surface to satisfy the required roughness.

In general, cams are mechanical components used to convert rotational motion into linear motion in various machinery.

Such a cam is required to be processed to satisfy the roughness of the cam surface according to the purpose of use due to the problem of deterioration of the operation accuracy when the roughness of the surface is lowered during manufacturing or use.

In particular, when the cam is used in a structure coupled to the camshaft, a variety of automatic or manual methods are used to wrap the surface of the cam.

That is, there are methods in which a polishing tool wraps the surface of the cam in an automated machine such as a cam coupled to the camshaft. Such lapping has a problem that the device is expensive and cannot be easily used in the field.

In addition, there is a method of manually wrapping the cam coupled to the cam shaft while rotating the cam shaft by biting both ends of the cam shaft, and such lapping is inexpensive and costs can be easily processed in the field. It was difficult to constantly grind and there was a problem that workability is lowered.

Therefore, there is a demand in the industry for an apparatus that can process the surface of the cam with excellent processing cost while being easily processed in the field.

The present invention is designed to solve the problems of the prior art described above, and is provided with a simple structure, which is easy to use as well as inexpensive to manufacture, and has an object of providing excellent lapping processing efficiency of the cam. .

The present invention aims to provide excellent reliability of use because the cam surface is easily wrapped while the cam shaft coupled to the rotary chuck is rotated and the cam surface is processed to satisfy the required roughness.

This invention,

While lapping the cam shaft on which the cam has been laid is rotated by a rotating chuck,

Comprising the grip handle on one side and the upper and lower grippers to grip and grind the cam surface on the other side around the center of rotation axis,

The upper and lower grippers are formed by forming a bracket having a central axis coupled to the inner side of the base so as to be movable left and right, and a left and right polishing roll that rotates to grip and polish the cam surface on both sides of the bracket. Polishing jig for processing.

According to the present invention, the bracket of the lower gripper is characterized in that it is opposed to the U-shape having a groove in the center for the grip of the cam surface.

The upper and lower grippers of the present invention are characterized by inserting each of the bullet springs so that the shock absorbing operation during the left and right flow of the bracket between the left and right sides of the base and the bracket around the axis.

The present invention provides a simple structure formed by opposing the gripper on the other side of the grip handle on one side of the center rotating shaft to grip the camshaft by the upper and lower grippers while rotating the camshaft cam coupled to the rotary chuck. By providing a lapping process of the cam surface by the polishing roll in a simple operation, it is easy to use and the manufacturing cost is low due to the simple structure, and it is easy to use, and also has the effect of excellently providing the lapping processing efficiency of the cam. will be.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail.

The cam lapping polishing jig of the present invention is for lapping the cam surface while rotating the cam shaft on which the cam is laid.

Such a cam lapping polishing jig is shown in Figures 1 to 3,

The upper and lower grippers 20 and 20 'are formed in an X shape so as to be rotatable about a central rotation shaft 11, and grips and grips the grip surface 10 and 10' on one side and the cam surface on the other side. It is made by opposing configuration.

The upper and lower grippers 20, 20 ′ are brackets 25 and 25 ′ whose centers are coupled to shafts 22 so as to be movable left and right inside the bases 21 and 21 ′, and the brackets ( 25 and 25 ', the left and right polishing rolls 26 and 27 are rotated so as to grip and polish the cam surface.

At this time, the left and right polishing rolls 26 and 27 of the upper and lower grippers 20 and 20 'are preferably selected to have a larger width than the cam width.

The brackets 25 and 25 'of the upper and lower grippers 20 and 20' are formed to face each other in a U shape having grooves 25a at the center for grip of the cam surface.

In addition, the upper and lower grippers 20, 20 'are brackets 25, 25' between the left and right sides of the base 21, 21 'and the brackets 25, 25' around the shaft 22. It is configured by inserting each of the bullet springs 28 so that the shock absorbing operation in the left and right flow of the).

As shown in the figure, 12 denotes a bolt for connecting and assembling the base 21 and 21 'of the upper and lower grippers and the grip handles 10 and 10'.

Next will be a look at the operation and action of the subject innovation configured as described above.

In a structure in which at least one cam 3 is coupled to the cam shaft 2, for example, a crankshaft of an automobile engine cylinder, the cam is machined to satisfy the surface roughness according to the purpose of use during manufacturing or use. Is required.

To this end, first, both ends of the camshaft 2 are installed by being bitten by a rotary chuck (not shown).

In addition, the grip handles 10 and 10 'of the present invention jig are rotated about the rotation shaft 11 to open the front upper and lower grippers 20 and 20' to face each other.

In this state, the grip handles 10 and 10 'are positioned around the rotary shaft 11 while the cam 3 on the cam shaft 2 is positioned between the upper and lower grippers 20 and 20'. It rotates in reverse and grips the upper and lower grippers 20 and 20 'in front to oppose each other.

In this way, the left and right polishing rolls 26 and 27 provided on the left and right sides of the brackets 25 and 25 'of the upper and lower grippers 20 and 20' are upper and lower left and right sides of the cam 3, that is, the cam 3. ) It is in a state located at four outer points.

When the cam shaft 2 is rotated by the rotation of the rotary chuck in which the cam shaft 2 is installed in this state, the abrasive jig of the present invention, which is gripped on the cam 3 of the frying cam shaft 2, is also rotated together and the upper plate is suspended. Since the grip handle 10 is supported by (5), only the cam 3 is continuously rotated, and the polishing jig is kept in a restricted state.

At this time, the grinding jig in the grip state of the cam (3) is gripped by the grip handle 10 is carried out the operation to pinch the grip (10, 10 ').

That is, the left and right polishing rolls 26 and 27 of the upper and lower grippers 20 and 20 'are in close contact with the outer surface of the cam 3.

As such, the polishing rolls 26 and 27 positioned at the top, bottom, left and right four points on the surface of the cam 3 have brackets 25, 25 'along the surface of the cam. This causes the ball to be in close contact with the cam surface while swinging left and right with respect to the shaft 22.

Therefore, the polishing rolls 26 and 27 which are in close contact with the surface of the cam 3 can be subjected to lapping evenly by the rotation operation of the cam.

In addition, since the brackets 25 and 25 'of the upper and lower grippers 20 and 20' are formed in a U shape having grooves 25a in the center, the cams have irregular surfaces. Interference is eliminated at the time, and only the rolls 26 and 27 are supported by the elastic roll so that the lapping process can be effectively performed.

In this way, when the lapping processing of the cam is completed, the rotation operation of the rotary chuck is stopped, and the grip handles 10 and 10 'of the inventive grinding jig are rotated about the rotating shaft 11 to raise and lower the gripper 20 ( 20 ') by simply opening it apart.

Accordingly, the present invention provides a simple structure in which a grip handle on the other side of the grip handle is formed on the other side of the rotary shaft, and grips the cam shaft by the upper and lower grippers while rotating the cam shaft with the cam. In this simple operation, the polishing roll is provided to effectively wrap the surface while elastically adhering to the surface of the cam, thereby providing excellent use efficiency.

1 is a front view showing a polishing jig of the present invention.

2 is a cross-sectional view showing a polishing jig of the present invention.

3 is a perspective view of main parts of the present invention;

Figure 4 is a state of use of the present invention.

** Description of the symbols for the main parts of the drawings **

10,10 ': Holding handle 11: axis of rotation

20,20 ': Gripper 21,21': Base

22: Shaft 25, 25 ': Bracket

26, 27: polishing roll 28: ball spring

Claims (3)

In the polishing jig for lapping the surface of the cam while rotating the cam shaft on which the cam has been built up by rotating the cam shaft, The upper and lower grippers 20 and 20 'are formed in an X shape so as to be rotatable about a central rotation shaft 11, and grips and grips the grip surface 10 and 10' on one side and the cam surface on the other side. Configure them to face each other, The upper and lower grippers 20, 20 ′ are brackets 25 and 25 ′ whose centers are coupled to shafts 22 so as to be movable left and right inside the bases 21 and 21 ′, and the brackets 25 A cam jig for grinding the cam, characterized in that formed by forming the left and right polishing rolls (26, 27) to rotate to grip and polish the cam surface on both sides of the (25 '). The method of claim 1, The brackets 25 and 25 'of the upper and lower grippers 20 and 20' are cam-lapping, characterized in that they are formed in a U-shape having a groove 25a at the center for grip of the cam surface. Polishing jig for processing. The method of claim 1, The upper and lower grippers 20, 20 ′ are formed between the bases 21, 21 ′ and the left and right sides of the brackets 25, 25 ′ with respect to the shaft 22. Cam lapping polishing jig, characterized in that made by inserting and installed each of the carbon spring (28) so that the shock absorbing operation during the left and right flow.

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