JPH10180501A - Lathe machining, lathe machining device, round rod member, and lathe machined product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform precise work in lathe machining to a member hard to be cut in an overhang-supported condition by holding it by a guide bush. SOLUTION: A round rod member is rotatably held by a guide bush 3 installed and fixed on the main body side of a lathe work device to be supplied along its length, so it is supplied from the guide bush 3 toward a work tool disposed on the main body side, so lathe work is performed in an overhang- supported condition, where a member having a fixed lubricating layer 2 of a specified thickness preliminarily formed on an outer circumferential surface of it is used as the round rod member 1, thereby low friction of the holding condition by the guide bush 3 can be made in lathe machining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lathe processing method, a lathe processing apparatus, a round bar material and a lathe product, and more particularly to a lathe chuck which rotatably supports one end and the other end rotatably by a tailstock. A so-called CNC type, which is a lathe processing different from a normal lathe processing apparatus that performs lathe processing while supporting, for example, a round bar material is rotatably and feedably supported in a single support state and lathe processing is performed while sequentially feeding. The present invention relates to a technique suitable for an automatic lathe (guide bush type, Swiss type CNC lathe, etc.).

[0002]

2. Description of the Related Art Generally, in order to process a so-called long bar in lathe processing, a middle part of the outer periphery of the round bar is rotatably supported by a chuck on a lathe apparatus, and the round bar is rotatably supported. Centering is performed on the other end surface of the machine by a center drill or the like, and the processed center is rotatably supported by using a tailstock of a lathe apparatus, so that both sides are supported. After this preparation step, the apron on which the cutting tool is mounted is generally cut by the cutting tool while moving in the longitudinal direction of the round bar.

On the other hand, CNC type automatic lathes support a relatively small diameter round bar or tube material so as to be rotatable and feedable in a single support state, and sequentially feed the round bar material to a cutting tool such as a cutting tool. The lathe processing is performed while performing, and the center processing described above can be omitted, and the center processing can be performed on a small-diameter part that is difficult to perform.

According to the CNC-type automatic lathe, for example, in the case of continuous machining by unmanned automatic operation, in order to improve the machining accuracy for a round bar material that is rotatably and feedably supported in a single-supported state, the center runout is eliminated. Called a fixed bush (guide bush) for this purpose. Incidentally, a rotary bush type CNC-type automatic lathe that uses a rotary bush that rotates in conjunction with a round bar is also in practical use in part. According to this type of lathe, the machining accuracy is inferior to that of the fixed bush type because the lathe is more expensive than the fixed bush type, and there is a slight occurrence of center runout.

[0005] In view of the circumstances described above, CNC bush lathes of the fixed bush type are currently frequently used.

Referring to the drawings, a description will be given of a fixed bush of a fixed bush type CNC automatic lathe. FIG. 6 is a front view of the fixed bush, which is shown together with the round bar 1.

In this figure, four split grooves 3a are formed in this fixed bush 3 in a substantially cross shape as shown. The fixed bush 3 is provided with a hole 3n formed so as to be concentric with the outer diameter of the fixed bush 3 in the longitudinal direction of the drawing. The hole 3n is formed in the above-mentioned split groove 3
a is formed continuously.

The hole 3n is made of tungsten carbide 3
c, etc., is formed by machining from a super-hard material, and by sufficiently securing abrasion resistance, the fixed bush 3 holds the round bar 1 so as to be able to be sent out along the longitudinal direction. Is sequentially fed to a cutting tool 12 shown by a broken line in the direction of the arrow, so that lathe processing in a single support state can be performed without center runout.

That is, when performing lathing, the gap between the hole 3n of the fixed bush 3 and the outer peripheral surface of the round bar 1 is set to be as small as possible, and lathing is performed. Small and high-accuracy lathe processing can be realized.

[0010]

As described above, lathing using a fixed bush is made of a metal material such as free-cutting steel or copper containing a sulfur component, and the outer peripheral surface thereof has the above-mentioned hole 3n. By directly contacting and rotating at a high speed, even if the amount of generated heat is large, the material is limited to metal materials or other industrial materials capable of maintaining a sufficient sliding state. ing. In other words, the supplier of the fixed bush type CNC type automatic lathe, free cutting steel,
There is no guarantee other than good cutting metal materials such as copper.

For example, in the case of metal titanium, which is extremely difficult to lathe, a special cutting tool having a cutting bit set at a rake angle of about 20 degrees is prepared, and the peripheral speed of the round bar 1 is adjusted accurately. It is known that lathing can be performed at last while sufficiently supplying and cooling the cutting fluid so as to make it nearly water-like.

However, in the case of such a difficult-to-cut material, if the above-mentioned fixed bush 3 is used as it is, a galling K as shown in FIG. 6 is generated.

When such a galling K occurs, the material to be cut becomes defective in machining, and the galling K grows at an accelerated rate. For this reason, for example, in the case of unmanned automatic operation, the operation must be forcibly stopped halfway, and in some cases, the device is destroyed, which is a serious problem.

Therefore, it has been common sense that difficult-to-cut materials cannot be turned by a fixed bush type CNC automatic lathe.

[0015] The inventors of the present application have studied and considered the cause of the occurrence of such galling K and found the following.

That is, difficult-to-process materials such as pure titanium, titanium alloy, and stainless steel have a thermal conductivity of 0.05 (cal / cm / s).
ec / ° C) or less. This value is at least one order of magnitude lower than the thermal conductivity of a good working material such as the above-mentioned free-cutting steel and copper.

From this, the frictional heat generated by the rotation at the contact surface between the outer peripheral surface of the round bar 1 made of, for example, a titanium bar and the hole 3n of the fixed bush 3 is generated by the rod 1
Gradually accumulates heat inside, resulting in thermal expansion,
The outer diameter of the rod material 1 was increased and melted, and the rod material 1 was partially adhered to the hole 3n. This was found to be the cause of the generation of galling K.

On the other hand, rod materials and tube materials containing difficult-to-process materials are wrapped with rust-proof paper or special paper at the time of shipment from a factory or during long-term storage in order to prevent dirt and scratches or to prevent rust. Although shipment or management is performed on a daily basis, extra work is required for these operations, resulting in increased costs.

A number of lathe products including a round bar material and a tube material, in which a solid lubricating layer having a predetermined thickness is formed on the outer peripheral surface or the inner peripheral surface thereof, have been put into practical use. In order to obtain such a product, after performing predetermined machining including lathe processing, in order to form a solid lubricating layer at a desired portion, masking of an unnecessary portion of solid lubricating layer formation is performed. After forming a coating film, a dried product is obtained after drying and firing.

Further, for example, Japanese Patent Application Laid-Open No. 54-137569 discloses a composition for drawing a steel material by utilizing the releasability of TFE (tetrafluoroethylene low polymer) of a fluoropolymer. It has been disclosed. According to this composition, it seems to work effectively for securing the gloss of the surface after drawing, but does not contribute to the active formation of the solid lubricating layer. Therefore, even in this proposal, a separate process is required to form a solid lubricating layer having a predetermined thickness on the outer peripheral surface or the inner peripheral surface.

As described above, in order to form a solid lubricating layer,
Since the number of man-hours increases, extra man-hours are required for parts management during completion, which has led to an increase in cost.

Accordingly, the present invention has been made in view of the above-mentioned problems, and it has become possible to lathe hard-to-cut materials with a fixed bush type CNC automatic lathe, which has been considered impossible in the past. It is intended to provide a lathe processing method and a lathe processing apparatus.

It is another object of the present invention to provide a round bar material and a tube material which do not require extra steps for preventing dirt and scratches or preventing rust.

It is an object of the present invention to provide a low-cost lathe product in which a solid lubricating layer having a predetermined thickness is formed on an outer peripheral surface, an inner peripheral surface, or an external surface thereof.

[0025]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, according to the present invention, a guide bush installed and fixed on a main body side of a lathe processing apparatus holds a rotatable and rotatable along the longitudinal direction of a round bar material, and holds the guide bar from the guide bush. A lathe processing method in which lathing is performed in a single-supported state by sequentially feeding a processing tool disposed on a main body side, wherein a solid lubricating layer having a predetermined thickness is previously formed on an outer peripheral surface as a round bar material. It is characterized in that lathing is carried out by using the one formed with the above so as to reduce the friction of the state held by the guide bush.

A guide bush installed and fixed on the main body side of the lathe machining apparatus is held rotatably and rotatably along the longitudinal direction of the round bar, and a processing tool disposed on the main body side from the guide bush. By sequentially sending out, a lathe processing device that performs lathe processing in a single support state, by using a round bar material having a solid lubricating layer of a predetermined thickness previously formed on the outer peripheral surface thereof, It is characterized in that the holding state by the guide bush is reduced.

A guide bush installed and fixed to the main body side of the lathe machining apparatus is held rotatably and rotatably along the longitudinal direction, and sequentially from the guide bush to a processing tool disposed on the main body side. By being sent out, it is a round bar material that is subjected to lathe processing in a single support state, and by forming a solid lubricating layer of a predetermined thickness on the outer peripheral surface in advance, it is possible to reduce the friction of the state held by the guide bush. It is characterized by aiming.

[0028] A guide bush installed and fixed on the main body side of the lathe machining apparatus is held rotatably and rotatably along the longitudinal direction of the round bar, and a processing tool disposed on the main body side from the guide bush. A lathe product in which lathing is performed in a single-supported state by sequentially sending out a solid lubricating layer having a predetermined thickness on an outer peripheral surface thereof in advance as a round bar. It is characterized in that lathing is performed so as to reduce the friction of the state held by the guide bush, and a solid lubricating layer is left.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a flow chart showing steps for forming a solid lubricating layer. In this figure, first, step S
1, a metal material having a thermal conductivity of 0.05 (cal / cm / sec / ° C) or less, for example, pure titanium, titanium alloy, stainless steel, nickel alloy, Hastelloy (trade name), Inconel (trade name) One batch of a solid or tubular round bar 1 having a predetermined diameter and full length of another hard-to-cut metal material is prepared and stored in a tray.

Subsequently, proceeding to step S2, the surface is removed by degreasing or washing with water such as a solvent such as trichloroethylene or carbon tetrachloride, and the coating unevenness and the adhesion strength of the coating film described later are reduced. Try to prevent decline.

In step S3, sand blasting, liquid honing or similar roughening with alumina (60 to 120 mesh) is performed uniformly on the surface including the outer peripheral surface and the inner peripheral surface.

The physical processing of the round bar is thus completed, and the flow advances to step S4 to clean the surface by flushing or washing with high-pressure air. The above steps S2 to S4 are collectively referred to as a base processing step. In this step, any one of the steps can be omitted as necessary.

Next, in step S5, the paint is prepared by stirring the paint and adjusting the viscosity using a thinner or the like as necessary.

In step S6, if necessary, PTFE (polytetrafluoroethylene)
Is uniformly applied by a method such as a spray gun, a roll coater, and dipping.

In the following step S7, at 100 ° C. for about 30
Pre-drying is performed for a minute, and the process proceeds to the firing step of step S8. In this firing, baking is performed at 380 ° C. for about 30 minutes.

Thereafter, the flow advances to step S9 to perform cooling. During this cooling, sufficient durability to withstand sliding of the fixed bush can be secured even at room temperature, but if the solid lubricating layer remains in the final product and the solid lubricating layer is exposed to high temperature or steam, it is baked. Later, if the water is cooled immediately, the durability is further improved.

As described above, since the solid lubricating layer 2 is formed on the surface of the round bar 1, this state is shipped from the factory. still,
Examples of the round bar include an outer surface including an outer peripheral surface and a side surface and a pipe-shaped round bar in which the solid lubricating layer 2 is formed not only on the outer peripheral surface but also on the inner peripheral surface. Further, the solid lubrication layer 2 formed on the round bar 1 is fixed to a fixed bush type CN.
The material is not limited to the above-mentioned difficult-to-process material as long as it is to be turned by a C-type automatic lathe, and may be a good-process material.

The solid lubricating layer 2 is made of fluororesin,
Molybdenum disulfide, tungsten disulfide, graphite, boron nitride, polyimide, polyamide,
PBI (polybenzimidazole) -based, silicone resin-based polysulfone-based, polyether-based, and polyetheretherketone-based paints are used by appropriately combining one or more of them. The forming conditions are as thin as possible. Not destroyed. Preferably, the solid lubricating layer 2 is set to 1 or more and 100 μm or less so that brittle fracture does not occur in the holding state by the fixed bush, and the outer diameter tolerance of the round bar is kept within the general tolerance. It is good to

FIG. 2 is a principle diagram showing how lathing is performed by a CNC automatic lathe of a fixed bush type.

In this figure, a hopper 5 for accommodating a large number of round bars 1 having undergone the process shown in FIG. 1 is disposed behind a main body 10 of the lathe apparatus. From the bottom of the round bar 1
It is configured to discharge to the downstream side for each one.

On the downstream side of the hopper 5, a part of the discharged round bar 1 is gripped by the chuck portion 4a as shown in the figure, and then driven to rotate at high speed in the direction of arrow D1 in the figure.
Further, a gripping rotation feed mechanism 4 for feeding out the round bar 1 at a constant speed in the direction of arrow D2 is provided.

A fixed bush 3 fixed to the main body 10 is provided downstream of the gripping rotation feed mechanism 4, and an end of the round bar 1 guided in the hole 3n of the fixed bush 3. The configuration is such that the portion 1 a is held in a state of protruding outside the main body 10.

Referring further to the front view of the fixed bush 3 shown in FIG. 4, the fixed bush 3 is formed with four split grooves 3a in a substantially cross shape as shown. The hole 3n formed so as to be concentric with the outer diameter portion thereof is formed continuously with the split groove 3a. The holes 3n are formed from a super-hard material such as tungsten carbide 3c, and can be sent out along the longitudinal direction of the round bar 1 by the fixed bush 3 by ensuring sufficient wear resistance. And arrow D in FIG.
By sequentially feeding the round bar 1 that is rotated at a high speed in one direction to the cutting tool 12 and the drill 15, lathe processing in a single support state can be performed without center deviation.

Therefore, in preparation for lathe processing,
A nut (not shown) is screwed into the screw portion 3b, gradually tightened, and the split groove 3 is formed by the component force generated in the tapered portion 3P.
a so as to narrow the hole 3n of the fixed bush 3,
The gap between the round bar 1 and the outer peripheral surface is set as small as possible.
After this preliminary preparation, lathing is performed as described below, and lathing with high accuracy and minimal occurrence of center runout can be realized. In FIG. 4, for convenience of illustration, a gap is provided between the hole 3 n and the layer 2 on the outer peripheral surface of the round bar 1. It is adjusted to the required size (several micrometer to several tens of micrometer) so that the gap becomes fine.

On the other hand, the main body 10 has a moving table 13 having a plurality of types of cutting tools 12, a moving table 16 having a drill 15 having a different outer diameter, and a moving table 18 having a different vertical end mill 17. But each one body
It is provided so as to be relatively movable with respect to zero. The main body 10 is provided with a supply section 14 for supplying a cutting fluid to the cutting section and a tray 20 for storing the work W after processing.

The above hopper 5, gripping rotation feed mechanism 4,
A control device 100 is connected to each of the moving tables and the like via signal lines shown by broken lines, and an automatic lathe machining program can be executed using the input device 101 and the display device 102 connected to the control device 100. I have.

FIG. 3 is an operation explanatory view showing a state after the start of an automatic lathe machining program for machining a workpiece W having a shape as shown.

In the figure, first, a machining program for machining a workpiece W having a shape as shown in the figure is input to the input device 10.
1. Input to the control device 100 using the display device 102. Then, when it is started, first, the arrow A from the hopper 5
The round bar 1 is discharged in the direction, and the middle portion is gripped by the gripping rotation feed mechanism 4 as illustrated. Further, the round bar 1 is held by the fixed bush 3 set so that the gap has a minimum necessary size by the above-mentioned preparation, and the rotation is started.

Subsequently, for example, after the moving table 16 is moved in the direction of arrow D5 to perform drilling with the drill 15, the hole is moved by moving in the direction of arrow D6. Further, before and after this, after the moving table 13 is moved in the direction of arrow D3 and a desired byte is selected,
The cutting tool 12 is moved by the cutting allowance in the direction of arrow D4 and stopped.

Thereafter, the arrow D2 of the gripping rotation feed mechanism 4
Feeding of round bar 1 by moving action in direction (arrow A1 direction)
Is performed to perform cutting. At this time, the cutting fluid is supplied from the supply unit 14 to the cutting unit. Even a difficult-to-cut material can be cut without using any special cutting fluid or oil.

By the above operation, a work W having an arbitrary shape as shown in the figure is processed. Here, the moving table 18 provided with the end mill 17 is for cutting the round bar material 1 stopped at a predetermined angle by the fixed bush, and the end mill is used to cut a keyway, a bolt head and the like. Since the shape portion can be appropriately processed, all the desired products can be processed with one lathe device. Further, a grinder or the like can be appropriately added.

The round bar 1 automatically supplied as described above
Machining using is based on unmanned automatic operation in principle. Therefore, for example, when a difficult-to-process material such as pure titanium, a titanium alloy, and stainless steel having a thermal conductivity of 0.05 (cal / cm / sec / ° C) or less is used as it is, a conventional round bar is used. Friction heat generated by rotation at the contact surface between the outer peripheral surface of the material 1 and the hole 3n of the fixed bush 3 is gradually stored inside the rod material 1 to cause thermal expansion, and the outer diameter of the rod material 1 is increased. Increased, and a staking state was formed, in which a part of the holes was fixed to the hole 3n, and the automatic operation had to be forcibly stopped halfway.

However, referring again to FIG. 4, a round bar 1 having a solid lubricating layer 2 having a predetermined thickness formed on the outer peripheral surface thereof through the steps described in FIG. By using the cutting tool, the cutting tool 12 is rotated at a high speed in the direction of the arrow D while reducing the friction of the holding state by the fixed bush 3 so as to reduce the friction.
As a result, since lathing can be performed, heat generation due to friction can be prevented. As a result, good machining is possible even with difficult-to-cut materials.

FIG. 5 is a cross-sectional view of the center of a lathe product. FIG. 5 (a) is obtained by cutting using a titanium metal round bar 1 having an outer diameter of 6 mm by the above method. FIG. 3 is a center sectional view of the needle 200 in a folded state.

This needle 200 is a needle before fine adjustment used as a needle of an ultrasonic scalpel for cataract surgery of a human eyeball, and has a total length of about 35 mm and an outer diameter of about 0.8 mm at the tip. And has a through hole. Conventionally, in order to obtain such a needle 200, a dedicated cutting tool is prepared, and a large amount of a dedicated cutting fluid is used. I was For this reason, they have been reused by disinfection after use in surgery.

Even with such a needle 200, using the lathe shown in FIGS. 1 to 4, for example, a large number of round bars 1 made of titanium metal having a total length of about 200 to 250 cm are set in the hopper 5. By automatically operating a plurality of lathes and performing lathe processing at a predetermined number of revolutions (around 2000 rpm), it is possible to produce a large number of lathes with high precision at low cost.

As a result, a large quantity can be manufactured at low cost, so that it can be handled as a so-called disposable product like a syringe, and hospital infection can be positively prevented.

FIG. 5B is a cross-sectional view of the center of the roller 201, which is processed so as to leave the state in which the solid lubricating layer 2 is formed, so that only the portion 1c into which the bearing B is press-fitted is processed. It was done.

By processing as described above, the roller 201
A step of separately forming the solid lubricating layer 2 on the outer peripheral surface of the device becomes unnecessary. Furthermore, since the solid lubricating layer 2 is formed on the round bar material 1 in advance, there is an advantage that consideration for preventing dirt and scratches or generating rust is not required.

FIG. 5 (c) shows a lathe shown in FIGS. 1 to 4 in which a pipe material 1 in which a solid lubricating layer 2 is formed in advance on both the outer peripheral surface and the inner peripheral surface of a pipe is used. It is sectional drawing of the processed joint product 202. In this figure, by turning only the threaded portion 1d and leaving the solid lubricating layer 2 on both the outer peripheral surface and the inner peripheral surface, it is resistant to rust and reduces the resistance to the fluid flowing inside. Products that can be reduced can be provided. The illustrated product can be obtained by using a device or a tool capable of screw processing such as a normal NC lathe or a general-purpose lathe.

Although it has been described that the thickness of the solid lubricating layer 2 is preferably set to 1 or more and 100 μm or less to prevent brittle fracture due to holding and sliding of the fixed bush 3, For example, as shown in FIG. 5C, the joint part 202 having the threaded portion 1d that does not require exceptional processing accuracy can be processed in a light holding state, so that brittle fracture does not occur even if the thickness of the solid lubricant layer 2 is increased. So
It can be formed thick.

Finally, in the above description, the case where the solid lubricating layer 2 is formed in advance on the round bar material 1 side is mainly described. However, if necessary, the solid lubricating layer 2 is formed on the hole 3n side of the fixed bush 3. It may be formed in advance and lathed in preparation for the solid lubricating layer 2 of the fixed bush 3 being immediately worn away. Therefore, in this case, automatic continuous operation cannot be performed.

[0064]

As described above, according to the present invention,
Fixed bushing C
It is possible to provide a lathe processing method and a lathe processing apparatus capable of realizing lathing with an NC type automatic lathe.

Further, it is possible to provide a round bar material which does not require extra man-hours for preventing dirt and scratches or preventing rust.

And, it is possible to provide at low cost a lathe product having a solid lubricating layer of a predetermined thickness formed on its outer peripheral surface, inner peripheral surface, or external surface.

[0067]

[Brief description of the drawings]

FIG. 1 is a flowchart showing a process for forming a solid lubrication layer.

FIG. 2 is a principle view showing how lathing is performed by a fixed bush type CNC automatic lathe.

FIG. 3 is an operation explanatory view showing how lathing is performed by a fixed bush type CNC automatic lathe.

FIG. 4 is a front view of a fixed bush 3;

FIG. 5 is a center sectional view of a lathe product.

FIG. 6 is a front view of a conventional fixed bush.

[Explanation of symbols]

 Reference Signs List 1 round bar material 2 solid lubrication layer 3 fixed bush 4 gripping rotation feed mechanism 5 hopper 10 body (fixed bush type CNC automatic lathe) 12 bytes

Claims (23)

[Claims] 1. A guide bush installed and fixed on a main body side of a lathe processing apparatus, so that it can be sent out and rotatably held along the longitudinal direction of a round bar material and a tube material, and from the guide bush to the main body side. A lathing method in which lathing is performed in a single-supported state by sequentially feeding the processing tools to be disposed, wherein a solid lubricating layer having a predetermined thickness is formed on an outer peripheral surface of the round bar in advance. A lathe processing method, wherein lathing is performed so as to reduce friction of the holding state by the guide bush by using the guide bush. 2. The lathe processing includes turning with a cutting tool, hole drilling with a cutting drill, and grinding with a grinding device, and further, the rotation is stopped, and the round bar held at a predetermined angle by the guide bushing. The lathe processing method according to claim 1, further comprising a vertical end mill for processing the material and a grinding device for performing the grinding, the hole processing, the cutting, and the grinding as appropriate. . 3. The round bar material has a thermal conductivity of 0.05.
(Cal / cm / sec / ° C) Pure metal made of pure titanium, titanium alloy, stainless steel, nickel alloy, Hastelloy (trade name), Inconel (trade name) and other hard-to-work metal materials that are less than (cal / cm / sec / ° C) The lathe processing method according to claim 1, wherein a material or a tube material is included. 4. The solid lubricating layer is made of a fluorine resin,
Molybdenum disulfide, tungsten disulfide, graphite, boron nitride, polyimide, polyamide,
2. The method according to claim 1, wherein one or more of PBI (polybenzimidazole) -based, silicone resin-based, polysulfone-based, polyether-based, and polyetheretherketone-based paints are appropriately combined. Lathe processing method. 5. A step of preparing a base for the round bar and tube material, a step of applying the paint of each system, a step of pre-drying, and a step of firing for forming the solid lubricating layer. The lathe processing method according to claim 4, wherein the step of cooling is sequentially performed. 6. The solid lubricating layer is set to a thickness as small as possible, and preferably from 1 to 100 μm to prevent brittle fracture in the holding state by the guide bush. ,
The lathe processing method according to claim 5, wherein outer diameter tolerances of the round bar material and the tube material are kept within general tolerances. 7. A guide bush installed and fixed on the main body side of the lathe processing apparatus, is held rotatably and rotatably along the longitudinal direction of the round bar, and is disposed on the main body side from the guide bush. A lathe processing apparatus that performs lathe processing in a single support state by sequentially sending out to a processing tool, wherein the round bar material having a solid lubricating layer having a predetermined thickness previously formed on an outer peripheral surface thereof is used. A lathe processing apparatus characterized in that the friction of the holding state by the guide bush is reduced. 8. The machining tool includes a cutting tool for turning, a cutting drill or a grinding device for drilling a hole, and further performs a cutting process on a round bar material stopped at the predetermined angle by the guide bush after stopping the rotation. Do vertical end mill,
The lathe processing device according to claim 7, further comprising a grinding device. 9. The round bar material has a thermal conductivity of 0.05.
(Cal / cm / sec / ° C) Pure metal made of pure titanium, titanium alloy, stainless steel, nickel alloy, Hastelloy (trade name), Inconel (trade name) and other hard-to-work metal materials that are less than (cal / cm / sec / ° C) The lathe processing apparatus according to claim 7, comprising a material or a tube material. 10. The solid lubricating layer includes a fluororesin type, a molybdenum disulfide type, a tungsten disulfide type, a graphite type, a boron nitride type, a polyimide type, a polyamide type, a PBI (polybenzimidazole) type, a silicone resin type, The lathe processing apparatus according to claim 7, wherein one or a combination of one or more of a polysulfone-based, a polyether-based, and a polyetheretherketone-based paint is appropriately used. 11. A process for preparing a solid lubricating layer for the round bar and tube material, a process for applying the paint of each system, a process for pre-drying, and a process for firing. The lathe processing apparatus according to claim 10, wherein the lathing processing is sequentially performed. 12. The brittle fracture in the holding state by the guide bush is prevented by setting the thickness of the solid lubricating layer to be as small as possible and preferably set to 1 to 100 μm.
The lathe processing apparatus according to claim 11, wherein an outer diameter tolerance of the round bar is kept within a general tolerance. 13. A guide bush installed and fixed to a main body side of a lathe processing apparatus, is held rotatably and rotatably along a longitudinal direction, and is provided with a processing tool disposed on the main body side from the guide bush. A round bar material that is subjected to lathe processing in a single-supported state by being sequentially sent out, and a solid lubricating layer having a predetermined thickness is formed in advance on an outer peripheral surface, so that the state of the state held by the guide bush is maintained. Round bar material characterized by low friction. 14. The round bar material has a thermal conductivity of 0.05.
(Cal / cm / sec / ℃) or less, including pure titanium, titanium alloy, stainless steel, nickel alloy, Hastelloy (trade name), Inconel (trade name) and other hard-to-work metal materials The round bar according to claim 13, wherein: 15. The solid lubricating layer may be a fluororesin type, a molybdenum disulfide type, a tungsten disulfide type, a graphite type, a boron nitride type, a polyimide type, a polyamide type, a PBI (polybenzimidazole) type, a silicone resin type, 14. A combination of one or more of a polysulfone-based, polyether-based, and polyetheretherketone-based paint, as appropriate.
Round bar material described in. 16. A step of preparing a base for the round bar, a step of applying a paint of each system, a step of pre-drying, a step of baking, and a step of cooling to form the solid lubricating layer. 16. The round bar according to claim 15, wherein 17. The brittle fracture is prevented from occurring in the state of being held by the guide bush by setting the thickness of the solid lubricating layer to be as small as possible and preferably set to 1 to 100 μm. 14. The round bar according to claim 13, wherein an outer diameter tolerance of the round bar is kept within a general tolerance. 18. A guide bush installed and fixed on a main body side of a lathe processing device, is held rotatably and rotatably along a longitudinal direction of a round bar, and is disposed on the main body side from the guide bush. A lathe product in which lathing is performed in a single support state by sequentially sending out to a processing tool, wherein the round bar material has a solid lubricating layer having a predetermined thickness previously formed on an outer peripheral surface thereof. By using, the lathe processing is performed so as to reduce friction of the holding state by the guide bush, and at least a part of the solid lubricating layer is left. . 19. The lathe processing includes turning with a cutting tool,
Including grinding for drilling with a cutting drill and grinding with a grinding device, and further performing grinding with a vertical end mill for performing processing on the round bar material held at a predetermined angle by the guide bush by stopping the rotation. The lathe-processed product according to claim 18, further comprising a grinding device for performing turning, drilling, cutting, and grinding as appropriate. 20. The round bar material has a thermal conductivity of 0.05.
(Cal / cm / sec / ° C) Pure metal made of pure titanium, titanium alloy, stainless steel, nickel alloy, Hastelloy (trade name), Inconel (trade name) and other hard-to-work metal materials that are less than (cal / cm / sec / ° C) 19. A lathe according to claim 18, comprising material or tubing, leaving a second solid lubrication layer formed on the inner peripheral surface of the tubing. 21. The solid lubricating layer includes a fluororesin type, a molybdenum disulfide type, a tungsten disulfide type, a graphite type, a boron nitride type, a polyimide type, a polyamide type, a PBI (polybenzimidazole) type, a silicone resin type, 19. A material obtained by appropriately combining one or more of polysulfone-based, polyether-based, and polyetheretherketone-based paints.
Lathe processing product described in 1. 22. An undercoating process for the round bar, a process of applying the paint of each system, a preliminary drying process, a firing process, and a cooling process for forming the solid lubricating layer. The lathe-processed product according to claim 18, wherein 23. The thickness of the solid lubricating layer is set to be as small as possible, preferably 1 to 100 μm, so that brittle fracture does not occur in the holding state by the guide bush. 19. The lathe product according to claim 18, wherein an outer diameter tolerance of the round bar is kept within a general tolerance.