Alloy damping aseismatic knife lever

Abstract

The alloy damping anti-seismic cutter rod is disclosed, the cutter rod comprises an alloy part and a damping part at the head end part, the damping part comprises the following components in terms of mass: tungsten 94-96%, nickel 1.0-1.5%, iron 0.06-0.13%, copper 0.1-0.5%, cobalt 1.8-2.5%, molybdenum 0.8-1.5%, the damping part in the application increases the wave-absorbing component on the basis of tungsten, the wave-absorbing component comprises tungsten, nickel, cobalt, molybdenum and the like, reasonable limitation of the composition changes the natural vibration frequency of the damping part, the resonance phenomenon disappears when deep cavity processing of the parts is carried out, and the machining precision is improved, the component proportion of the damping part is limited in the application, and meanwhile, the length ratio of the damping part and the alloy part is changed, so that the bending strength can be greatly improved under cooperation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of turning devices, in particular to an alloy damping anti-vibration tool bar. BACKGROUND

[0002] One of the factors affecting the machining precision of parts is vibration. For example, in the turning machining of a deep cavity of a part, vibration caused by the same frequency resonance of a tool bar greatly affects the machining precision. In this regard, some enterprises improve the structure of the tool bar, such as adding a weight-reducing layer, and the structure assembly is relatively complex and not practical, and needs to be improved. SUMMARY

[0003] To solve the above at least one technical defect, the application provides the following technical scheme:

[0004] The alloy damping anti-vibration tool bar disclosed in the application comprises an alloy part and a damping part at the head part of the alloy part, and the damping part comprises the following components in terms of mass: tungsten 94-96%, nickel 1.0-1.5%, iron 0.06-0.13%, copper 0.1-0.5%, cobalt 1.8-2.5% and molybdenum 0.8-1.5%.

[0005] Further, the damping part comprises the following components: tungsten 95%, nickel 1.3%, iron 0.1%, copper 0.3%, cobalt 2.2% and molybdenum 1.1%.

[0006] Further, the length ratio of the damping part to the alloy part is 1:3.

[0007] Further, the forming of the damping part comprises the following steps:

[0008] First, the components are proportioned according to the above defined proportions, ball-milled, granulated and dried.

[0009] Second, the dried particles are sintered to form a sintered product, which comprises a pre-sintering stage, a solid-phase sintering stage, a liquid-phase sintering stage and a cooling stage, the temperature of the pre-sintering stage is lower than 850 DEG C, the temperature of the solid-phase sintering stage is lower than 1500 DEG C, and the temperature of the liquid-phase sintering stage is lower than 1600 DEG C.

[0010] Third, the sintered product after cooling is prepared into a formed damping part.

[0011] Further, the temperature of the solid-phase sintering stage is 1300-1450 DEG C, and the maintaining time is 6h; the temperature of the liquid-phase sintering stage is 1500-1580 DEG C, and the maintaining time is 8h.

[0012] Further, the drying temperature is 450-600 DEG C, and the granularity of the particles after ball-milling is 0.3-0.5 mu m.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] 1、The damping part in the application increases wave-absorbing components on the basis of tungsten, the wave-absorbing components include tungsten, nickel, cobalt, molybdenum and the like, reasonable limitation of the composition changes the natural vibration frequency of the damping part, and the resonance phenomenon disappears when deep cavity processing of the parts is carried out, and the processing precision is improved.

[0015] 2、The application limits the component proportion of the damping part, and changes the length ratio of the damping part and the alloy part, and the bending strength can be greatly improved under cooperation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0017] Figure 1 is the amplitude analysis diagram of the tool bar of the comparative example 1.

[0018] Figure 2 is the amplitude analysis diagram of the tool bar of the application.

[0019] Figure 3a is the organization crystal phase diagram of the damping part.

[0020] Figure 3b is the organization amplification crystal phase diagram of the damping part.

[0021] Figure 4a is the amplification crystal phase diagram of tungsten.

[0022] Figure 4b is the amplification crystal phase diagram of nickel.

[0023] Figure 4c is the amplification crystal phase diagram of iron.

[0024] Figure 4d is the amplification crystal phase diagram of copper.

[0025] Figure 4e is the amplification crystal phase diagram of cobalt.

[0026] Figure 5 is the structural schematic diagram of the tool bar.

[0027] In the drawings: 1, damping part; 2, alloy part. DETAILED DESCRIPTION

[0028] The application will be further described below in combination with the drawings and specific embodiments.

[0029] The preparation of the damping part is as follows:

[0030] First, the components are proportioned according to Table 1 by electronic weighing;

[0031] Ball milling and granulation: the proportioned materials are granulated to 0.4 μm by ball milling;

[0032] Drying: the granules after ball milling are added into a rotary dryer, the drying temperature is 500℃, and the time is 5h.

[0033] Second, the dried granules are sintered into a sheet-shaped damping part, which includes:

[0034] Pre-sintering stage: the temperature is raised from room temperature to 800℃, and the holding time is 4h;

[0035] Solid phase sintering stage: the temperature is raised from 800℃ to 1450℃, and the holding time is 6h, the near-eutectic temperature range, solid phase reaction and diffusion are intensified;

[0036] Liquid phase sintering stage: the temperature is raised from 1450℃ to 1500℃, and the holding time is 8h, the liquid phase appears in the alloy, the shrinkage is completed and the crystallization transformation occurs, forming the basic organization and framework of the damping part;

[0037] Cooling stage: the temperature is gradually reduced from 1500℃ to room temperature, and the cooling time is 14h.

[0038] Table 1: Proportioning of damping part components

[0039]

[0040] The crystal phase of the damping part composed of proportioning 1 is detected, as shown in Figure 3a , Figure 3b , wherein Figure 4a is tungsten, Figure 4b is nickel, Figure 4c is iron, Figure 4d is copper, Figure 4e is cobalt, etc. The test shows that the density ratio of the damping part is 14.35, the material hardness is HRA94.5, and the bending strength is 4500MPa. The damping parts composed of proportioning 2 and proportioning 3 have basically the same performance as the damping part composed of proportioning 1.

[0041] Example 1

[0042] The alloy damping anti-seismic knife rod includes an alloy part 2 and a damping part 1 at the leading end of the alloy part 2, as shown in Figure 5 , the alloy part 2 and the damping part 1 are fixed as a whole by riveting and welding, and the alloy part is a sheet-shaped body made of tungsten steel material with a brand of YT712.

[0043] The length ratio of the damping part 1 to the alloy part 2 is 1:3, the mass ratio of the damping part 1 to the alloy part 2 is 1:2.5, and the damping part 1 is formed by the proportion 1 in Table 1.

[0044] Example 2

[0045] Compared with Example 1, the difference is that the damping part is formed by the proportion 2 in Table 1 in this example.

[0046] Example 3

[0047] Compared with Example 1, the difference is that the damping part is formed by the proportion 3 in Table 1 in this example.

[0048] Comparative Example 1

[0049] Compared with Example 1, the difference is that the whole tool bar is formed by the traditional YT712 (brand) material in this example.

[0050] The performance of the tool bars prepared in Examples 1-3 and Comparative Example 1 is detected, and the results are shown in the following table.

[0051] Table 2: Bending strength detection

[0052]

[0053] The vibration frequency of the tool bar is detected, the amplitude graph of the tool bar prepared in Example 1 is shown in Figure 2 , the amplitude graph of the tool bar prepared in Comparative Example 1 is shown in Figure 1 , the natural frequency is obviously changed, the resonance phenomenon of the tool bar disappears when deep cavity machining, and the bending strength of the tool bar is obviously improved.

[0054] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above examples, any technical scheme falling within the idea of the present application belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. An alloy damping anti-vibration tool holder, characterized in that, The tool holder includes an alloy part (2) and a damping part (1) at its head end. The damping part (1) comprises the following components by mass: 94-96% tungsten, 1.0-1.5% nickel, 0.06-0.13% iron, 0.1-0.5% copper, 1.8-2.5% cobalt, and 0.8-1.5% molybdenum.

2. The alloy damping anti-vibration tool bar as described in claim 1, characterized in that: The damping part (1) comprises the following components: 95% tungsten, 1.3% nickel, 0.1% iron, 0.3% copper, 2.2% cobalt, and 1.1% molybdenum.

3. The alloy damping anti-vibration tool bar as described in claim 1, characterized in that: The length ratio of the damping part (1) to the alloy part (2) is 1:

3.

4. The alloy damping anti-vibration tool bar as described in claim 1, characterized in that: The forming of the damping part (1) includes the following steps: First, the ingredients are prepared according to the component ratio specified in claim 1, ball milled and granulated, and then dried. Second, the dried particles are sintered into shape, including a pre-sintering stage, a solid-phase sintering stage, a liquid-phase sintering stage, and a cooling stage. The temperature of the pre-sintering stage is below 850℃, the temperature of the solid-phase sintering stage is below 1500℃, and the temperature of the liquid-phase sintering stage is below 1600℃. Third, the damping part is prepared by sintering the cooled material (1).

5. The alloy damping anti-vibration tool bar as described in claim 4, characterized in that: Solid-phase sintering stage temperature: 1300-1450℃, holding time: 6h; liquid-phase sintering stage temperature: 1500-1580℃, holding time: 8h.

6. The alloy damping anti-vibration tool bar as described in claim 4, characterized in that: The drying temperature is 450-600℃, and the particle size after ball milling is 0.3-0.5μm.

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