JP4797242B2 - Semi-dry rolling method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a semi-dry (trace mist) rolling method in flat rolling for machining a screw .
[0002]
[Prior art]
A conventional flat rolling method is a wet method as shown in FIG. The coolant nozzle 6 directly applies coolant 7 to the workpiece 3 from above the workpiece, and the coolant 7 penetrates between the flat die teeth 12 and 13 and the workpiece 3 to form an oil film. In such a conventional flat rolling method, the coolant nozzle 6 faces the workpiece 3, so that the coolant 7 is not easily applied to the flat die teeth 12 and 13 when the flat dies 1 and 2 are returned. Naturally, sludge-like processing waste (for example, FIG. 1B) 20 remains on the flat die tooth surface, and the processing waste between the flat die teeth 12 and 13 and the workpiece 3 when the next workpiece 3 is processed. This has shortened the life of the flat die teeth 12 and 13. In the conventional flat rolling method, the coolant used is mostly oily. In order to remove the processing waste even in the conventional wet processing, air blow can be performed when the flat die is returned. However, the coolant adhering to the tooth surface of the flat die becomes mist, which deteriorates the working environment. In addition, with wet oil-based and water-soluble coolant, machining waste cannot be removed unless high-pressure air blow is used, and when high pressure is used, a cover and a dust suction device that prevent the coolant from scattering are required, resulting in high costs. Recently, there is an example in which water-soluble coolant is used instead of oil-based coolant. However, with wet oily and water-soluble coolants, if oily, the work piece must be cleaned in a later process, and in the case of water-soluble coolants, there is a problem of deterioration and decay when mixed with slide lubricant. But it had a bad influence on the global environment.
[0003]
[Problems to be solved by the invention]
The problem of the present invention is that, even in the flat rolling method for processing a screw , as in the case of small-diameter splines and gears, it does not use wet oil-based or water-soluble coolant, and it is necessary to perform cleaning in a later process as in the case of oil-based An object of the present invention is to provide a flat rolling processing method and a rolling processing apparatus that do not. It is preferable to provide a flat rolling process method that is friendly to the global environment and does not have the problem of deterioration due to deterioration when mixed with slide lubricant as in the case of water-soluble coolant, and does not require a large coolant tank.
[0004]
[Means for achieving the object]
The present invention provides a rolling process method in which a screw is machined by a flat die that moves in the vertical direction, and a mist outlet is provided between the upper part of the workpiece and the upper flat die before meshing with the workpiece, A mist nozzle arranged so that the mist is sprayed from the bottom to the top along the threading groove of the upper flat die before meshing with the workpiece from the mist blowout port over the entire width of the upper flat die. A small amount of mist is applied to the threading groove of the upper flat die from the bottom to the top and in the direction opposite to the rolling process direction , and pressurized air is applied to the mist nozzle for rolling. The above-mentioned problems have been solved by removing the machining waste adhering to the groove for threading of the rolling flat die generated in the manufacturing process .
In the invention according to claim 2, the oil type used for the mist is a vegetable oil or a synthetic oil which is highly biodegradable.
Furthermore , in a flat rolling device that rolls a screw with a flat die that moves in the vertical direction, a mist nozzle is provided between the upper portion of the workpiece and the upper flat die before meshing with the workpiece. The mist nozzle has at least one mist inlet and a mist outlet, and the mist outlet extends over the entire width of the upper flat die before the upper flat die is engaged with the workpiece. A semi-dry rolling apparatus arranged so that mist is sprayed along the groove for threading from bottom to top and in the direction opposite to the rolling direction .
Further, the mist nozzle has at least one mist inlet and a plurality of mist outlets, and a part of the mist outlets are engaged with the workpiece over the entire width of the upper flat die. The upper dies are arranged so that mist is sprayed from below to above along the threading grooves of the upper flat die, and another mist outlet is engaged with the work piece over the entire width of the lower flat die. A semi-dry rolling processing device arranged so that mist is sprayed along the threading groove of the lower flat die after the manufacturing process may be used. The mist nozzle may further include another mist blowing port, and the another mist blowing port may be a semi-dry rolling apparatus arranged so that mist is blown to the workpiece .
[0005]
With such a configuration, even in the flat rolling method for processing a screw , as in the case of small-diameter splines and gears, no wet oily or water-soluble coolant is used, and no cleaning in the subsequent process is required as in the case of oily. The flat rolling process was provided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
[Example 1]
An embodiment of the present invention will be described with reference to FIG. FIG. 1A is a schematic perspective view of a main part of a semi-dry rolling apparatus used in an embodiment of the present invention, and FIG. 1B is a screw of a left flat die 1 before meshing with a workpiece of FIG. The elements on larger scale of the process groove | channel 8 are shown. In order to perform the semi-dry rolling process of the screw , the mist nozzles 10 and 11 are respectively installed toward the flat dies 1 and 2 that mesh with the workpiece material 3 on which the screw is processed. The mist outlet of the left flat die mist nozzle 10 has an elongated hole shape, and is arranged so that mist is sprayed along the threading groove of the workpiece 13 over the entire width of the left flat die tooth surface 8. The mist outlet of the right flat die mist nozzle 11 is also formed in a long hole shape, and is arranged so that mist is sprayed along the threading groove of the workpiece 13 over the entire width of the right flat die tooth surface 9.
[0007]
When the rolling process is started, the workpiece 13 supported by the head stock center 5 and the tail stock center 4 is moved downward by the left rack 1 and upward by the right rack 2 by a rolling disk drive device (not shown). The workpiece 13 is rolled and a thread is processed by rolling. At this time, a small amount of mist is formed on the tooth surfaces 8 and 9 of the flat dies 1 and 2 before meshing with the workpiece 13 as a workpiece. It is applied through the nozzles 10 and 11 for use. The minute amount of mist becomes a lubricant and penetrates between the flat die tooth surfaces 8 and 9 and the workpiece 13 to form an oil film. In the example shown in FIG. 1, the amount of trace mist is about 5 to 10 cc / h per nozzle. By the rolling process, sludge-like processing waste 20 (FIG. 1B) remains on the rack tooth surfaces 8 and 9, but the front dies 1 and 2 are processed before the workpiece 13 is processed in the next processing. Since the mist nozzles 10 and 11 are disposed in the sludge, the sludge-like processing waste 20 is blown off before rolling by the air pressure of a very small amount of mist blown out from the nozzle. As a result, during the rolling process, the processing waste 20 does not enter between the flat dies 1 and 2 and the workpiece 13, a good lubrication state is obtained, and the rack tooth surface is not damaged. The life of the dies 1 and 2 is good.
[0008]
The present applicant has proposed a semi-dry rolling method in the unpublished 1999 patent application No. 174823 as a method for solving the problems of the prior art in rolling processing of small-diameter splines, gears and the like. According to this method, by arranging at least one mist nozzle substantially parallel to the groove of the flat die, the mist is sprayed over the entire width of the flat die tooth along the flat die tooth surface. While removing the rolling scraps, an oil film can be formed. However, in the rolling of the workpiece of the screw, the direction diameter splines of threading groove of the flat die, unlike gears, etc., has become an angle close to parallel to the traveling direction of the flat die. Therefore, small-diameter spline, it is difficult to blow the rolling scraps flat die face width throughout with exertion similar mist and gears, etc., it had been caused to shorten the flat die life semi-dry rolling of the screw The present invention has solved these problems.
[0009]
[Example 2]
Another embodiment of the present invention will be described with reference to FIG. As in the first embodiment, in order to perform the semi-dry rolling process of the screw , the mist nozzles 10 and 11 are respectively installed toward the flat dies 1 and 2 that mesh with the workpiece 13 that is a material on which the screw is processed. ing. The mist nozzle has a plurality of mist outlets 12 and 13 ', and the mist outlets 12 and 13' extend along the threading groove of the flat die before meshing with the workpiece over the entire width of the flat die. So that mist can be sprayed. What is necessary is just to set a hole diameter and a hole space | interval appropriately according to the width dimension of the target workpiece for a mist blower outlet. At this time, if the mist sprayed on the flat dies 1 and 2 flows in the direction opposite to the workpiece 13 as shown in FIG. Does not bite into the rolled part. Furthermore, when machining waste becomes a problem, the angle of the holes of the blowout ports 32 and 33 is sprayed with mist on the flat dies 1 and 2 just before rolling as shown in FIG. It is recommended to spray mist on the part of the die immediately after rolling. Further, when it is desired to further improve the lubricity, the hole angle of the blowout ports 42 and 43 is preferably set so that mist is also applied to the workpiece 13 as shown in FIG.
[0010]
【The invention's effect】
By using the semi-dry rolling machine with such a configuration, a small amount of mist is applied to the groove for threading of the upper flat die from below to above and in the direction opposite to the rolling direction, so that the minute amount of mist becomes a lubricant. It penetrates between flat die workpieces to form an oil film, and sludge-like machining waste adhering to the screw machining grooves of the upper flat die can be blown away from the bottom to the top. The friction between the tooth surfaces of the die is reduced, and the flat die tooth surface is not damaged by processing waste, so that the life of the flat die is kept equivalent to that when using wet oil-based or water-soluble coolant. In addition, there is no need to clean the work piece in the subsequent process as in the case of oiliness, and there is no problem of deterioration and deterioration due to mixing with the lubricating oil of the slide as in the case of water-soluble coolant. Does not require cement system, it was intended to provide a friendly flat rolling method and apparatus of the global environment.
[0011]
Preferably, pressurized air may be added to the mist nozzle to better remove the rolling waste generated by rolling and adhering to the tooth surface. Moreover, you may make it remove more the rolling waste adhering to a tooth surface by arrange | positioning a several mist blowing outlet so that mist may be sprayed over the whole width | variety of a flat die. In addition, by arranging multiple mist outlets over the entire width of the flat die so that mist is sprayed on both the flat die before rolling and the flat die after rolling, the rolling scraps that adhere to the tooth surface May be better removed. In addition, a mist outlet may be arranged so that mist is sprayed on the workpiece, and the formation of an oil film between the flat die and the workpiece may be made more stable. Furthermore, the oil type used for the mist can be made harmless to the human body by using a vegetable oil or a synthetic oil that is highly biodegradable.
[Brief description of the drawings]
1A is a schematic perspective view of a main part of a semi-dry rolling apparatus used in an embodiment of the present invention, and FIG. 1B is a left side flat die 1 before meshing with a workpiece of FIG. The partial enlarged view of the tooth gap 8 is shown.
FIG. 2 is a schematic perspective view of a main part of a semi-dry rolling apparatus used in another embodiment of the present invention.
FIG. 3A is a semi-dry form rolling used in yet another embodiment in which mist blowing ports 22 and 23 are provided with an angle of a hole so that mist blown on a flat die flows in a direction opposite to the workpiece. main part schematic perspective view an example of a processing apparatus, (b) the holes in the outlet 32 and 33 angle on the opposite side of the flat die, in addition to the embodiment described in blown mist to the site immediately after rolling Example of schematic perspective view of main part of semi-dry rolling processing apparatus to be used , (c) is used for another embodiment in which the angle of the holes of the blowout ports 42 and 43 is sprayed on a flat die immediately before rolling. The example of a principal part schematic perspective view of the semi-dry rolling processing apparatus to perform is shown.
FIG. 4 is a schematic perspective view of a main part of a conventional wet rolling apparatus.
[Explanation of symbols]
1, 2 ··· Flat die 8, 9 · · Flat die tooth surface 10, 11 · · Mist nozzle 13 · · Work piece

Claims (2)

In a rolling process method in which a screw is machined by a flat die that moves in the vertical direction, a mist outlet is provided between the upper part of the workpiece and the upper flat die before meshing with the workpiece, from the mist outlet. Through a nozzle for mist arranged over the entire width of the upper flat die so that the mist is blown upward from below along the threading groove of the upper flat die before meshing with the workpiece, Generated by rolling by applying a small amount of mist to the threading groove of the upper flat die from below to above and in the direction opposite to the rolling direction , and applying pressurized air to the mist nozzle. A semi-dry rolling method characterized in that rolling is performed so as to remove the machining waste adhering to the threading groove of the rolling flat die . 2. The semi-dry rolling method according to claim 1, wherein the oil type used for the mist is a vegetable oil or a synthetic oil, which is highly biodegradable .

Images