JPS61151056A - Processing machine body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a machining machine, and more particularly, to a machining machine that suppresses deterioration in machining accuracy due to vibrations generated during machining work.
Concerning a processing machine that mainly uses cement matrix.

[Conventional technology]

Most of the machining machines are metal products, and it has been a major problem that vibrations during machining work have an adverse effect on the machining process, and several attempts have been made to improve them. For example, processing machines made of cement concrete or cash register/concrete have been used experimentally or practically to absorb vibrations.

[Problems that the invention attempts to solve]

However, the cement comfried truck is
Porous materials are thought to be better in terms of vibration absorption, but wouldn't that reduce the strength of the concrete member? The durability of the machine that is used for processing will be low. Furthermore, resin concrete products have an insufficient modulus of elasticity and are more expensive than cement-based products.

With the aim of providing a processing machine that uses inexpensive cement-based metal, suppresses harmful vibrations, and has sufficient strength as a member, the inventors of the present invention conducted extensive tests to obtain a cement hardened body that could not be obtained conventionally. It has high strength and high modulus of elasticity, and also has a high logarithmic damping rate of vibration damping performance.This improves machining accuracy by completely eliminating resonance vibration in the frequency range that is harmful to F and knife machining work. As a result, they discovered that the strength of the material could be sufficiently improved and completed the present invention.

[Means to solve the problem]

That is, the excitation damping performance logarithmic damping rate of the present invention is 0.02.
Jg top"c'sp, Ka, elastic modulus, di 30 X
This processing machine is characterized by being made of hardened cement with a hardness of 1'0'klil/cff1 or more.

Hereinafter, the present invention will be explained in detail.

The cement hardened body (hereinafter referred to as hardened body) according to the present invention is
It is a hardened material made of cementitious material hardened by a water use reaction with water, and it is a hardened material that contains any amount of aggregate etc. as required. That is, the hardened material of the present invention is, for example, a cementitious material or an ultrafine powder.

Superplasticizers, water and aggregates, cementitious materials, superplasticizers, calcium sulfate.

It can be manufactured by distributing water and aggregate, and if necessary, ultrafine powder.

The cementitious material is composed of a cementitious material, an expanding agent added as necessary, and a pozzolan such as Flyan 7U.

As the cementitious material, ordinary, early-strength, ultra-early-strength and white Portland cements are commonly used. In addition, moderate heat and low heat cement such as blast furnace cement and acetate resistant cement are also used.
Ru.

The ultrafine powder is a powder with an average particle size of IA or less, and there are no particular restrictions on its composition, but those that can be used in four baths with water are not suitable. In the present invention, it is also possible to use silica dust (silica fume), heptadium aluminum, etc., which are by-produced during the production of silicon, silicon-containing materials, and norconia. In view of the fluidity and moldability of the mixed material, the preferred amount of fi fine powder is 5 to 50 parts by weight based on the cementitious material.

A high-performance water reducing agent (hereinafter simply referred to as a water reducing agent) is a surfactant that increases dispersion power without causing too much delay in setting or excessive air entrainment even when added to cement in large quantities. Examples include salts of melamine sulfonic acid formaldehyde condensates, salts of naphthalene sulfonic acid formaldehyde condensates, high molecular weight polydanine sulfonates, and polycardanates. The standard amount of water reducing agent used is 0.3 to IJt% based on cement, but in the present invention, it is desirable to add it in a larger amount than that, preferably 1
The amount is 0 parts by weight or less, more preferably 1 to 5 parts by weight.

Also, general sand or gravel can be used as the aggregate, but the strength and modulus of elasticity can be improved if hard aggregate is selected based on Mohs hardness of 6 or higher or Knoop indenter hardness of 700' and 9/W'' or higher. This is extremely effective in improving vibration and reducing vibration.

The hard aggregate used is n7t, which is selected according to either a Mohs hardness of 6 or more, preferably 7 or more, or a Noog indenter hardness of 700'Kg/+012 or more.

All examples that meet this criterion include silica, pyrite,
Hematite, magnetite, yellow jade, rononite, dirandom, zenatite, spinel beryl 1 gold curb, tourmaline, granite, andalusite, cross stone, zircon, calcined bauxite, boron carbide, tungsten carbide, ferrosilicon nitride, Examples include silicon nitride, fused silica, ridged magnesia, and silicon carbide.

Calcium sulfate is preferably used in the form of an anhydrous salt or a dihydrate salt, preferably an insoluble anhydrous 5-precious fine powder. As a commercially available high-strength admixture containing calcium sulfate as a main component, for example, Denki Kagaku Kogyo (aL) trade name "rFukasigma 1" is available.
00OJ, Nippon Cement Co., Ltd.'s trade name "Atheno Super Minx", Showa Mining Co., Ltd.'s trade name "Guimix", etc. can be used. The amount of lactium sulfate added is 1 to 15 parts by weight based on the weight of the cementitious material. If it is less than 1 part by weight, there is no effect of increasing the strength (15 parts by weight).
- Even if it is mixed in excess of 10%, expansion cracks etc. will occur and higher effects cannot be obtained.

Add water to the above ingredients to obtain a mixed substance. 3. From the viewpoint of formability, the amount of water added is preferably 1.
12.5 or more heavy parts for the t part, more preferably 15
~30 parts by weight.

Although the present invention was achieved by using the above materials,
Furthermore, the following effects can be achieved by using the following inflatable materials and/or frying pans, etc.

The use of an expanding material is effective for adhesion to a bulkhead frame, etc., which will be described later, and for reducing shrinkage. # For upholstery materials, quicklime type,
Quicklime-gypsum-based and calcium-sulfoaluminum-based materials are effective, and from the viewpoint of their expansive properties, the preferred amount used is 20 MIk parts or less in cementitious material, more preferably 2 to 2 parts.
It is 15 parts by weight.

The use of fly flouches is effective in improving fluidity without deteriorating strength properties and in reducing changes in length. Spherical fly ash is most suitable. From the viewpoint of strength, the amount used is preferably 30 parts or less in the cementitious material, and more preferably 5 to 25 parts.
Parts by weight.

Further, the above materials and steel materials such as steel frames, reinforcing bars, and metallic θ frames can also be used as reinforcement materials for tension or bending, and for surface protection and attachment of machinery.

The logarithmic damping rate (hereinafter simply referred to as damping rate) of vibration damping performance as used in the present invention refers to the amount of noise generated when a test piece (hardened round bar) is hung on a hemp string and struck with a glass hammer. It is a value obtained by logarithmically converting the amplitude of a free damping vibration waveform and using the least squares method. As an example, FIG. 1 and FIG. 2 show the method of collapse and calculation.

FIG. 1 is a schematic layout diagram of the attenuation rate measurement method and 6111 equipment, and shows the measurement system.

FIG. 2 is a model of a free damping vibration waveform generated in a test piece, and is an example of calculating the damping rate from this model waveform as shown in the following equation.

That is, if the attenuation plan is δ, δ−ln −= An−= 1n−−”0= −In
-T-*X8 However, in the case of a cured product, it becomes porous, which may cause a decrease in strength, so it is preferably 0.07 or less in order to have both sufficient vibration absorption and strength. Also, if the hardened body is made denser to increase its strength, the damping rate will decrease and the vibration absorption will deteriorate, so in order to obtain high strength without impairing vibration absorption, it is necessary to 020 or more. However, the larger the elastic modulus is, the more preferable it is in view of the rigidity of the processing machine during processing operations, and for practical purposes, it is preferably 30 X 1 O'yu/cit or more.

For example, materials such as Lennon concrete and ALC whose elastic modulus is 9/i/9 smaller than 30 x 10' are not preferred from the viewpoint of durability.

The method for measuring the elastic modulus is based on the ASTMC469 elasticity test using a cylindrical specimen with a diameter of 1 ocIIL and a height of 201 cm, after sufficient curing (in principle, after 28 days).

The production of a processing machine using the material of the present invention can normally be carried out as follows. Where to use parallel attribute frames
To make a meal that does not use a metal frame, prepare a formwork with a predetermined shape. If necessary, set steel frames or reinforcing bars in advance. Knead the ingredients uniformly in a mixer. The mixing method is not particularly limited, but it may be a method in which all materials are added and mixed together, for example, the materials except for the ultrafine powder and the water reducing agent are kneaded in advance, and the ultrafine powder and the water reducing agent are added thereto. The method of separating and mixing, such as mixing and re-kneading, is an OT function. There are no particular restrictions on the mixer, and any conventional mixer may be used.

The uniformly kneaded material is then molded into a previously prepared metal frame or mold by pouring, injection, press-fitting, etc., using a vibrator if necessary, and is then molded at room temperature, normal pressure, and high temperature. It is hardened under normal pressure and high temperature pressure to form a processed machine body.

〔Example〕

The present invention will be described in more detail below with reference to Examples.

Example 1 Using the distribution meeting shown in Table 1 Experimental House 7 to 20, all the ingredients were put into a forced mixer at once and thoroughly kneaded for 7 tons.
φ6 Q w X 400 m (for damping rate), φ10
A cured cylindrical body of 01111×200+111 (for 541 elasticity coefficient) was completely prepared, and after sufficient curing, the attenuation rate and elastic modulus were measured. In addition, the compressive strength 1fk of the 3-month-old log was measured in accordance with JIS-A-1108. Full results table-1
Also listed in

Comparative Example Table-i Example 1 except that it was used in Example 8 of Actual ml~6
Go in the same way. The complete results are listed in Table 1.

<Materials used) 0 Cement: Denki Kagaku Kogyo Co., Ltd. Ordinary Boltland Cementon' see: Silica flour (Silica dust during the production of ferrotricon) (Average particle size: 0 .1μ) ・Water reducer・・・・・・・・・Denki Kagaku Kogyo Co., Ltd. Trade name 1'-FT-500J (Main component: salt of alkylnaphthalene sulfonic acid formaldehyde condensate) (Used in terms of active ingredient) O expansion agent J・・・・・・Denki Kagaku Kogyo Co., Ltd. Product name 1'-C8Asu20j K・・・・・・Calcium oxide calcined product 88 μd 0 calcium sulfate・・・・・・...Electrochemical industry (
Co., Ltd. Product name: Denka Sigma 000J o 7 Ryan 7U... Thermal power plant fly ash specific gravity 2.35 0 Sand A... River sand produced for Sagami 5th grade Mohs hardness 5
~5.5 B... Borax 5N lower Mohs hardness 7C...
... Corundum sand 5M bottom Mohs hardness D ...
... Magnetite crushed product 5mF Specific gravity 4.69E...
...Sumitomo Metal Mining Co., Ltd. product name "Pilton J"
5 + o + do 0 gravel F......! Crushed marine hard sandstone (maximum aggregate size = 13m1) Mohs hardness approximately 6.5 G...... Crushed magnetite product 5+a+ ~ 40 scale, specific gravity 4.83 H... Sumitomo Metal Mining Co., Ltd. product name "Guruton J 5 M~l 51010 water..."
・・Tap water Example 2 A cutting machine body as shown in Figure 3 was made with an iron frame (thickness: 5 mm), and the materials of experiment numbers 5 to 18 of Example 1 were poured into it. After molding using a vibrator and curing for 3 months in the open air, the vibration damping properties were examined and the maximum vibration +11i was compared with that of a conventional casting machine (Okenken 21). The results are shown in Table-2.

Table 2 (Note) 421 uses conventional casting for nine aircraft. It is possible to manufacture a processing machine that is strong, has a high modulus of elasticity, and does not change over time even with rapid temperature changes.

The machining machine manufactured in this manner improves machining accuracy because the vibrations generated by the power section do not resonate within the machining machine. In addition, the conventional processing machine made of cement concrete has insufficient ftff1 degree, and the processing machine of the present invention has extremely high f′i.
Furthermore, it is possible to minimize or eliminate the use of reinforcing steel materials in the processing machine.

[Brief explanation of drawings]

FIG. 1 is a schematic layout diagram showing a method of measuring the attenuation rate, and FIG. 2 is a diagram showing a method of calculating the attenuation rate. Furthermore, FIG. 3 is a perspective view of the grinding machine body of the embodiment. Code 1 Motor mounting part 2 and stone kV! , 9 attaching part 3 Processing table patent applicant Denki Kagaku Kogyo Co., Ltd. Review-1 Ba-3 1: Meter yfL distance Hiroshi 2-Study cup 3-fiQ: e-m

Claims (1)

[Claims] A processing machine comprising a hardened cement body having a logarithmic damping rate of vibration damping performance of 0.02 or more and an elastic modulus of 30×10^4 kg/cm^2 or more.