Preparation method of self-lubricating long-life tool for reducing built-up edge

Abstract

The application discloses a preparation method of a self-lubricating high-service-life cutter capable of reducing built-up edge, and steps of the method comprise the following steps: performing ultrasonic deionized water rinsing and dehydration drying on a workpiece; loading the workpiece into a vacuum processing furnace, vacuumizing, and injecting nitrogen; performing workpiece surface treatment by using an ion source; adjusting an arc source of the vacuum processing furnace to adapt to a surface nanometer coating device capable of switching, setting an unfiltered arc source supply, an A-type filtered arc source supply and a B-type filtered arc source supply; supplying the ion source by using the unfiltered arc source supply, bombarding the workpiece surface, and forming a base layer; supplying the ion source by using the A-type filtered arc source supply, bombarding the workpiece surface by using an ion beam formed by ions filtered by the A-type filtered arc source supply, and forming a roughly filtered intermediate precision layer; supplying the ion source by using the A-type filtered arc source supply, bombarding the workpiece surface, and forming a precision filtered surface; and introducing a gas containing Cr particles to deposit a self-lubricating layer.

Description

TECHNICAL FIELD

[0001] The present application relates to surface coating preparation technology and its using equipment, in particular, is a kind of self-lubricating high service life cutting tool preparation method for reducing built-up edge. BACKGROUND

[0002] Arc source carries out ion source supply, and the ion beam formed by ion source is accelerated to high speed and impacts the surface of target material, and the ion impact of ion beam makes the atoms of target material surface escape and deposit on the surface of base material, to form nanometer coating.

[0003] But the ion diameter generated by the arc source at the present stage is not the same, and the relatively large ion bombards the surface of workpiece, which will produce relatively large size pits, and large pits similar to liquid drops will be produced, and in particular in machining tool, the concave and convex will increase the adhesion to machining chips, and after the adhesion of machining chips, with the progress of machining, the friction of cutting tool and machining chips adhered will generate heat, which will damage the surface coating of machining tool, and also cause surface damage to the machined workpiece, i.e. the phenomenon of machining chip heat flow, and the large pit similar to liquid drop is called built-up edge.

[0004] Therefore, it is necessary to provide a self-lubricating high service life cutting tool preparation method for reducing built-up edge to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a self-lubricating high service life cutting tool preparation method for reducing built-up edge.

[0006] A self-lubricating high service life cutting tool preparation method for reducing built-up edge, the steps comprising:

[0007] 1) Workpiece is subjected to ultrasonic deionized water rinsing and dehydration drying;

[0008] 2) Workpiece is loaded into vacuum processing furnace, and vacuum is extracted to a vacuum degree lower than 1x10-3Pa, while nitrogen is injected, to a vacuum degree greater than 1.01x10-3Pa;

[0009] 3) Ion source works to process the surface of workpiece, for 2-4min, with a bias voltage of 100V;

[0010] 4) Adjust the arc source switching surface nanometer coating equipment carried by vacuum processing furnace, the vacuum processing furnace is provided with arc source supply module, and the arc source supply module comprises arc source loading plate, the arc source loading plate is provided with unfiltered arc source supply, A type rough filtering arc source supply and B type precise filtering arc source supply;

[0011] 5) Unfiltered arc source supply for ion source supply, unfiltered ion beam bombarding the workpiece surface, time 8-10 min, arc current 80A, bias 100V, forming the primer layer of the nano coating;

[0012] 6) A type of rough filtering arc source supply for ion source supply, A type of rough filtering arc source supply filtered ion beam bombarding the workpiece surface, time 5-7 min, arc current 85A, bias 130-150V, forming the rough filtering intermediate precision layer of the nano coating;

[0013] 7) B type precision filtering arc source supply for ion source supply, B type precision filtering arc source supply filtered ion beam bombarding the workpiece surface, time 2-4 min, arc current 95A, bias 110-110V forming the precision filtering surface of the nano coating;

[0014] 8) The gas containing cr particles is introduced, the ion source works, the time is 22-25 min, the bias is 110V, and the self-lubricating layer is deposited;

[0015] 9) Naturally cooled to 100℃ or less, the vacuum system is turned off, and the workpiece is taken out.

[0016] Further, the A type of rough filtering arc source supply includes a straight cylinder filter, and the diameter of the ion source filtered is greater than 20μm.

[0017] Further, the B type precision filtering arc source supply includes a special-shaped cylindrical filter, and the diameter of the ion filtered by the special-shaped cylindrical filter is greater than 10μm.

[0018] Further, the special-shaped cylindrical filter is an L-shaped filter.

[0019] Further, the special-shaped cylindrical filter is an s-shaped filter.

[0020] Further, the vacuum processing furnace is an eight-corner or six-corner furnace.

[0021] Further, the number of arc source supply modules is one fourth or one third of the number of inner walls of the vacuum processing furnace.

[0022] Compared with the prior art, the present application forms a sandwich type surface super slow nano coating by directly bombarding with unfiltered ion beam, bombarding with ion beam after rough filtering, and bombarding with ion beam after precision filtering. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the surface nano coating equipment adapted to switching of the arc source.

[0024] Figure 2is a schematic view of a straight cylindrical filter body.

[0025] Figure 3 is a schematic view of an L-shaped filter body.

[0026] Fig. 4 is a schematic view of a s-shaped filter body.

[0027] Figure 5 is a schematic view of the present application. DETAILED DESCRIPTION EMBODIMENT

[0028] Referring to Figures 1-5 The embodiment shows a method for preparing a self-lubricating high-service-life tool with reduced built-up edge, comprising the following steps:

[0029] 1) The workpiece is subjected to ultrasonic deionized water rinsing and dehydration drying;

[0030] 2) The workpiece is loaded into a vacuum processing furnace, vacuum is extracted to a vacuum degree lower than 1x10-3Pa, and nitrogen is injected until the vacuum degree is greater than 1.01x10-3Pa;

[0031] 3) The ion source is operated to perform workpiece surface treatment, for a time of 2-4 min and with a bias voltage of 100 V;

[0032] 4) An arc source adaptive switching surface nanocoating device is debugged and mounted on the vacuum processing furnace, the arc source adaptive switching surface nanocoating device comprising a vacuum processing furnace 100, the vacuum processing furnace 100 being provided with an arc source supply module 200, the arc source supply module 200 comprising an arc source loading plate 1, the arc source loading plate 1 being provided with an unfiltered arc source supply 2, an A-type roughly filtered arc source supply 3, and a B-type precisely filtered arc source supply 4;

[0033] 5) The unfiltered arc source supply 2 is operated to supply an ion source, an ion beam formed by unfiltered ions bombarding the workpiece surface 10 for a time of 8-10 min, with an arc current of 80 A and a bias voltage of 100 V, to form a 30-40% thick nanocoating base layer 20;

[0034] 6) The A-type roughly filtered arc source supply 3 is operated to supply an ion source, an ion beam formed by ions filtered by the A-type roughly filtered arc source supply bombarding the workpiece surface for a time of 5-7 min, with an arc current of 85 A and a bias voltage of 130-150 V, to form a 30-40% thick nanocoating roughly filtered intermediate precise layer 30;

[0035] 7) Type B precision filtering arc source supply 4 supplies ion source, the ion beam formed by the filtered ions of type B precision filtering arc source supply 4 bombards the surface of the workpiece, time 2-4 min, arc current 100 A, bias 130-150 V, forming a 10-20% thick nanometer coating precision filtering surface 40;

[0036] 8) the gas containing cr particles is introduced, the ion source works, time 22-25 min, bias 110 V, depositing the self-lubricating layer 50;

[0037] 9) naturally cooled to 100℃ or less, the vacuum system is turned off, and the workpiece is taken out.

[0038] Type A rough filtering arc source supply 3 includes a straight cylinder filter body 31, which performs ion source filtering with a diameter of 20μm or more.

[0039] Type B precision filtering arc source supply 4 includes a special-shaped cylinder filter body, which performs ion filtering with a diameter of more than 10μm.

[0040] The special-shaped cylinder filter body is an L-shaped filter body 41.

[0041] Meanwhile, the special-shaped cylinder filter body can also be a s-shaped filter body 42.

[0042] The vacuum processing furnace 100 is an eight-corner or six-corner furnace.

[0043] The number of arc source supply modules 200 is one fourth or one third of the number of inner wall surfaces of the vacuum processing furnace 100.

[0044] Compared with the prior art, the present application can adaptively select unfiltered ion beam direct bombardment, rough filtered ion beam bombardment, and precision filtered ion beam bombardment to prepare surface nanometer coating, and meet the nanometer coating preparation of different surface requirements.

[0045] The above only describes some embodiments of the present application. Those skilled in the art can make several modifications and improvements without departing from the inventive concept, and these all belong to the protection scope of the present application.

Claims

1. A method for preparing a self-lubricating tool with a long service life and reducing built-up edge, characterized by: include: 1) The workpiece is rinsed with ultrasonic deionized water, dehydrated and dried; 2) The workpiece is loaded into the vacuum furnace and evacuated to a vacuum degree lower than 1×10-3Pa. Nitrogen is injected at the same time to a vacuum degree greater than 1.01x10-3Pa. 3) The ion source works to treat the workpiece surface for 2-4 minutes with a bias voltage of 100V. 4) Debugging the surface nano-coating equipment equipped with an arc source adaptive switch equipped with a vacuum working furnace. The vacuum working furnace is provided with an arc source supply module, which includes an arc source loading plate. The arc source loading plate is provided with an unfiltered arc source supply component, a type A coarse filtered arc source supply component, and a type B fine filtered arc source supply component; 5) The unfiltered arc source supply is used to supply the ion source. The ion beam composed of unfiltered ions bombards the workpiece surface for 8-10 minutes, with an arc current of 80A and a bias voltage of 100V to form a base layer for the nano coating. 6) A type coarse filtering arc source supply is used to supply the ion source. The ion beam composed of the ions filtered by the A type coarse filtering arc source supply bombards the surface of the workpiece for 5-7 minutes, with an arc current of 85A and a bias voltage of 130-150V, forming a coarse filtering intermediate precision layer of the nano coating; 7) The B-type precision filtered arc source supply is used to supply the ion source. The ion beam composed of the ions filtered by the B-type precision filtered arc source supply bombards the workpiece surface for 2-4 minutes, with an arc current of 100A and a bias voltage of 130-150V, forming a nano-coated precision filtered surface; 8) A gas containing Cr particles was introduced, the ion source was operated for 22-25 minutes, the bias voltage was 110 V, and the self-lubricating layer was deposited; 9) Let the temperature drop naturally to below 100°C, turn off the vacuum system and remove the workpiece; Type A coarse filtering arc source supply includes a straight cylindrical filter body, which filters ions with a diameter of more than 20μm; Type B fine filtering arc source supply includes a special-shaped cylindrical filter body, which filters ions with a diameter greater than 10μm; the special-shaped cylindrical filter body is an L-shaped filter body or an S-shaped filter body.

2. The method for preparing a self-lubricating tool with a long service life and reduced built-up edge according to claim 1, characterized in that: The vacuum working furnace is an octagonal or hexagonal furnace.

3. The method for preparing a self-lubricating tool with a long service life and reduced built-up edge according to claim 2, characterized in that: The number of arc source supply modules is one quarter or one third of the number of inner walls of the vacuum working furnace.

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