JPS6150198B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an apparatus for applying a dry lubricant (such as Molykote (trademark)) to the tooth surfaces of a spline portion of a shaft.

This type of lubricant is a solution dissolved in a solvent (xylene) that is applied and dried. Conventionally, a sponge roller is used to manually apply an amount sufficient to adhere to the bottom surface of the spline tooth, and then the excess amount is removed. In particular, air is used to blow it out to prevent it from accumulating at the bottom of the tooth.

As a result, there are various problems such as requiring manual labor, toxic desiccant being blown away and creating a problem in the working environment, expensive dry lubricant being wasted due to scattering, uneven coating, and unsuitability for integration into processing lines. be.
An object of the present invention is to provide a dry lubricant application device that eliminates all of these problems.

To specifically explain the embodiment shown in the attached drawings, in Fig. 1, 1 is a workpiece (shaft), 2 is a spline part provided in a part of the workpiece 1, and dry lubricant is uniformly applied to each part of the teeth. It is something to do.

Numerals 3, 4, and 5 are gear trains that mesh sequentially and are arranged vertically, and their teeth have the same shape as spline teeth. The gear train is supported by a bearing member 6 and is moved up and down between the spline portion 2 and the liquid O in the tank 8 by a reciprocating drive source 7 such as a piston cylinder.

A dry lubricant solution O dissolved in a solvent is stored in the tank 8, and during operation of the apparatus, it is stirred by a blade 10 rotated by a motor 9 to keep the concentration of the solution uniform vertically.

Reference numeral 12 in FIG. 5 indicates a nozzle for spraying air onto the spline portion 2, and the operation of the above configuration is as follows.

a When a detection element such as a proximity switch (not shown in the figure) detects that the workpiece 1 has been conveyed and has come to the upper position of the gear trains 3 to 5, the fluid pressure control circuit is controlled by an electric control circuit operated by that signal, The piston cylinder (or electromagnetic plunger) acts to clamp the workpiece 1 from both ends at the center 13, supporting its axis parallel to the axes of the gear trains 3 to 5, and stopping it.

b The electric control circuit/fluid pressure control circuit that controls the reciprocating drive source 7 is activated by the workpiece support end detection signal in a, and the gear trains 3 to 5 in the position shown in FIG. 2 are set in advance via the support member 6. The uppermost gear 3 meshes with the spline 2.

c The first timer circuit is activated by the above-mentioned upward mesh end detection signal to stop the gear trains 3 to 5 in the state shown in FIG. 3. During the stop time, an excess amount of the solution O that has adhered to the lowest gear 5 due to its lower part being immersed in the solution O as shown in Fig. 2 is dropped in excess of the amount necessary for coating the spline. Set the time required to complete the process.

d When the set time of the first timer has elapsed, the second timer
The timer circuit is switched to the timer circuit, and the timer circuit controls the electric path of the motor that rotates the workpiece 1 in one direction s as shown in FIG. 4 through the center. The rotation of the workpiece also rotates gear trains 3 to 5, and the second gear 4 from the bottom squeezes out excess solution, and the required amount adheres to each tooth surface of the top gear 3, and the attached liquid is transferred to the spline section. It is applied to each tooth of 2.

e When the set time of the second timer has elapsed, the circuit is switched to the third timer circuit, the rotation of the workpiece 1 is switched to the reverse direction r, and the solution is applied to the opposite surface of the spline teeth.

f When the application time by the third timer is over, the gear train raising support control circuit b is activated and the gear train 3
5 is lowered to the set position where the lowest gear 5 in FIG. 2 is immersed in the solution O, and is stopped at that position.

g Nozzle 1 is activated by the above detection signal of gear train descending completion.
From step 2, blow air to even out uneven adhesion of the solution. In this case, the workpiece 1 continues to rotate (FIG. 5).

h Set the above air blowing time using the timer circuit, and use the end signal to operate the control circuits and control mechanisms for stopping the rotation of the workpiece, decentering it, and carrying it out, and complete one process of applying the dry lubricant solution to the spline 2. end.

Since the present invention has the above-described configuration, a necessary minimum amount of dry lubricant solution is uniformly applied to each surface of the teeth of the spline. Since the air used to level out coating unevenness requires only a weak pressure that does not cause the solution to scatter, the working environment is improved without scattering the toxic solution, and there is no wastage of the solution. The mechanism is simple and compact. The process controls a to h above can be easily obtained by combining well-known electric control circuits, pneumatic control circuits, motor circuits, etc., and therefore have the advantage of being easy to incorporate into a line.

[Brief explanation of the drawing]

Fig. 1 is a front view of the spline part to be processed and the gear train for applying dry lubricant solution, Fig. 2 is a side view of the device of the present invention, and Figs. 3 to 5 show the state during each operation stroke. Side view. 1 is the workpiece, 2 is the spline part, 3.4.
5 is a gear train, 6 is a gear train support member, 7 is a gear train vertical movement drive source, 8 is a dry lubricant solution storage tank, and 12 is an air nozzle.

Claims (1)

[Scope of Claims] 1 Consists of a gear train 3 to 5 that moves up and down by a drive source 7 between a dry lubricant solution storage tank 8 and a spline portion 2 of a workpiece 1 conveyed and stopped above the tank. When the column stops rising, the top gear 3 engages with the spline, and the bottom gear 5 is positioned above the level of the solution O to drip the excess solution that has adhered to it during immersion. 1. Gear train 3
~ 5 are rotated in conjunction with each other to apply the solution adhering to the lowest gear 5 to the teeth of the spline section 2 through the upper gear train sequentially, and after the set application time has elapsed, the above rotation is reversed to apply the solution adhering to the lowest gear 5 to the teeth of the spline section 2. The solution is applied to the side surface, and after the set time has elapsed, the gear train is lowered to the set position, and while the workpiece continues to rotate, air is sprayed onto the spline part for the set time to even out uneven application of the solution. A device that applies dry lubricant to the teeth of a spline constructed as follows.