JPH01164545A - Polishing device for wire material made of ti and ti alloy - Google Patents

Abstract

PURPOSE:To obtain a wire material having the superior surface state and rectilinearity with high efficiency in simple ways by revolving a spinner, allowing an alloy wire material to pass, and by sliding a plurality grindstones in the opposite radial direction by the centrifugal force and allowing said grindstones to contact the wire material. CONSTITUTION:A wire material made of Ti and Ti alloy is introduced onto a spinner 1 from one hollow shaft 11a and taken up from another hollow shaft 11b, passing through the space parts 22 and 22 of the grindstone holders 2 and 2. If, in this state, the spinner 1 is revolved, each thrust is generated on the grindstone holders 2 and 2 through a weight part 21 by the centrifugal force, and the grindstone holders 2 and 2 are slided in the direction of arrow, and the grinding surface of the grindstone 3 contacts a wire material 7 during passing, and the continuous grindstone holders 2 and 2 are slided in 180 deg. symmetry for the axis center O of the spinner, and the wire material 17 is applied with the successive bending simultaneously with polishing. Then, a scale layer is destroyed, and the bending and deformation in the foreprocess can be corrected, and a product having the superior straightness can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polishing apparatus for producing pure titanium and titanium alloy wire rods with excellent surface properties.

[Conventional technology]

Pure titanium and titanium alloys are lightweight, high strength, and have excellent corrosion resistance and heat resistance, so they are used for mechanical parts,
Demand is increasing in the fields of electrical parts and metal decorations. These pure titanium and titanium alloy products (including intermediate products) and wire rods are subjected to cold drawing during the manufacturing process or heat treatment after this processing, which can cause seizures or cover the surface with scale. surface quality deteriorates.

Conventionally, methods for improving this surface quality include peeling using a die and cutting using a centerless lathe.

[Problem that the invention seeks to solve]

However, the above-mentioned processing method not only has problems in that it involves a decrease in product yield, but also has difficulties in terms of processing efficiency, and in the case of peeling, the shape deteriorates due to misalignment of the central axis.
Furthermore, in the case of centerless lathes, there are problems such as restrictions on product length.

[Means for solving problems]

The present invention was devised to solve the above-mentioned problems, and its purpose is to easily and efficiently produce pure titanium and titanium alloy wire rods with excellent surface properties and good linearity. The object of the present invention is to provide a polishing device of this kind that can be obtained in the following manner.

In order to achieve the above object, the present invention provides a spinner that allows pure titanium and titanium alloy wire to pass through, and two or more grindstones.
Adjacent spinners are arranged so that they slide a certain distance from the rotating shaft in opposite directions when the spinner rotates.

[For production]

The device of the present invention is preferably installed on the exit side of a cold drawing device for pure titanium and titanium alloy wires or a heat treatment device following this device, and the spinner is operated while the pure titanium and titanium alloy wires are passed through the spinner. When rotated, each grinding wheel slides in opposite radial directions due to centrifugal force and comes into contact with pure titanium and titanium alloy wire, and the abrasive cutting edge continuously grinds the surface. At the same time, each grinding wheel slides in the opposite radial direction, which continuously bends the pure titanium and titanium alloy wires, ensuring that the scale layer is destroyed, and polishing the pure titanium and titanium alloy wires under tension. As a result, bends and deformations from the previous process are corrected.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figures 1 to 3 show an embodiment of the polishing apparatus for pure titanium and titanium alloy wire according to the present invention, where A is the apparatus according to the present invention, and the exit side of the cold drawing apparatus or the heat treatment apparatus B of the next step is shown. and the winding device C.

This invention! A includes a spinner 1, a grindstone holder 2, and a grindstone 3. First, spinner 1 has casing I
Hollow shafts 11a and llb are coaxially provided at both ends of the casings 10a and 10a in the longitudinal direction and communicate with the cavity 100 in the casing.
1a and llb are rotatably supported by bearings 4, 4,
It is driven and rotated at a predetermined speed by an electric motor (not shown).

In the illustrated case, the casings 10a and 10a are made up of two parallel blocks, and the blocks 10b and 10b with hollow shafts are tightened together by screw members 12 and 12, but the invention is not limited to this. Needless to say, this is not something that can be done.

Slide surfaces 101 and 101 that allow the grindstone holder 2 to slide are provided oppositely to the casings 10a, 10a. It is desirable that the sliding surfaces 101, 101 and the grindstone holder 2 are arranged in an even number of two or more at regular intervals so that the rotational centrifugal force of the spinner 1 does not become unbalanced. In the illustrated example, four are used.

Each grindstone holder 2 has side walls 20, 20 that are slidably fitted on the slide surfaces 101, 101, and is provided with a trowel portion 21 at the top for generating thrust by centrifugal force due to rotation of the spinner 1, In addition, a window-shaped space 22 is missing in the middle portion.

The whetstone 3 is a vitrified whetstone, a resinoid whetstone, a metal bond whetstone, etc., and is housed in about half of the space 22, particularly toward the side opposite to the spindle, and has screws of 5° on both sides in the thickness direction of the whetstone holder 2. Grindstone holder 2 that can be stopped with 5
It is designed to be clamped and fixed by 3a and 23b.

The grinding wheel 3 is preferably one of several types in which the abrasive grain size is made fine depending on the feeding direction of the pure titanium or titanium alloy wire 7.

Each grindstone holder 2 is arranged so that the iron part 21 is 180 degrees symmetrical with respect to the spinner axis O, and the casing 10a
, a stopper plate 24 fastened to the loa with bolts 6.
A and 24b restrict the protrusion.

One stopper plate 24a is connected to the casing IQa, 1
It has a length spanning 0a, and is in contact with the end surface of the grindstone holder 2 on the side opposite to the weight part. On the other hand, the other stopper plate 24b forms a set of two, is fixed in a relationship perpendicular to the stopper plate 24a, guides the iron part 21 at the inner end, and guides the side wall end face 25 of the grindstone holder 2. 25 and the predetermined slide length Q2
It is now possible to obtain .

In the assembled state, the pure titanium and titanium alloy wire rods 7 are guided into the cavity 100 of the spinner 1 through one hollow shaft 11a, and the space 22.2 of each grinding wheel holder 2.2.
22 and from the other intermediate shaft 11b to the winding device C.
guided by.

In this state, if the spinner 1 is rotated while winding the pure titanium and titanium alloy wire 7, the resulting centrifugal force will generate a thrust on the grinding wheel holders 2, 2 through the iron parts 21, respectively, and the slide surfaces 101 and 101 will be rotated. slide radially along. As a result, the grinding surface 30 of the grindstone 3 fixed to each grindstone holder 2 comes into contact with the passing pure titanium and titanium alloy wire 7, so that extremely highly efficient continuous grinding can be achieved.

The polishing surface 30 of each grinding wheel 3 is positioned and fixed at a distance Q1 from the spinner axis 0, and the grinding wheel holder 2 has a sliding length Q2, so that the pure titanium and titanium alloy wire 7 From the spinner center (L
-L) A trajectory is drawn whose radius is a point a distance before. The grindstone holder 2 adjacent to the above-mentioned grindstone holder 2 is
Since it slides 180 degrees symmetrically with respect to the spinner axis O, the pure titanium and titanium alloy wire 7 is
Draw a locus whose radius is the point that is symmetrical to the next point that is a distance ahead of Q2-Q.

As a result, the pure titanium and titanium alloy wire rods 7 are subjected to continuous bending at the same time as polishing, which destroys the scale layer generated during the heat treatment process, thereby further promoting the polishing effect.

In addition, since polishing is performed with a certain amount of tension applied to the pure titanium and titanium alloy wire 7, even if bending or deformation occurs in the previous process, it is corrected in this polishing process, resulting in good straightness. Becomes a product.

Next, an example of use of the device of the present invention will be shown.

The apparatus of the present invention was placed on the exit side of a cold drawing device, and a pure titanium wire rod with a diameter of 3) φ was processed using the cold drawing device and subsequently polished.

The specifications and polishing conditions of the apparatus of the present invention are as follows.

Number of whetstones = 4 stages Type of whetstone: Alumina grindstone Grain size of whetstone: 1st stage...180 2nd stage...180 3rd stage...1500 4th stage...2000 Spinner rotation Number: 100 rev/see Wire feeding speed: 60 mm/min As a result, the surface roughness of the pure titanium wire was Ra = 2.2 μm before polishing, but after polishing Ra = 0.

2 μm, and a good polishing effect was continuously obtained.

〔Effect of the invention〕

According to the present invention as described above, pure titanium and titanium alloy wire rods with good surface quality and straightness can be continuously produced with extremely high efficiency compared to conventional peeling methods using dies or cutting methods using centerless lathes. Moreover, excellent effects such as a simple structure and easy implementation can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing an example of the use of the pure titanium and titanium alloy wire polishing apparatus according to the present invention, and Fig.
3 is an exploded perspective view of the device of the present invention. 1...Spinner, 2...Whetstone holder, 3...Whetstone, 7...Pure titanium and titanium alloy wire rod

Claims (1)

[Claims] A spinner that allows pure titanium and titanium alloy wire to pass through is provided with two or more grinding wheels such that adjacent ones slide a certain distance from the rotating shaft in opposite directions when the spinner rotates. Polishing equipment for titanium and titanium alloy wire.